diff --git a/dist/jquery.gridster.css b/dist/jquery.gridster.css
index 36923624c3..800e228bbb 100644
--- a/dist/jquery.gridster.css
+++ b/dist/jquery.gridster.css
@@ -1,49 +1,57 @@
-/*! gridster.js - v0.1.0 - 2012-07-20
+/*! gridster.js - v0.1.0 - 2012-07-23
 * https://github.com/ducksboard/gridster.js
 * Copyright (c) 2012 ducksboard; Licensed MIT, GPL */
 
 .gridster {
-  position:relative;
+    position:relative;
 }
 
 .gridster > * {
-  margin: 0 auto;
-  -webkit-transition: height .4s;
-  -moz-transition: height .4s;
-  -o-transition: height .4s;
-  -ms-transition: height .4s;
-  transition: height .4s;
+    margin: 0 auto;
+    -webkit-transition: height .4s;
+    -moz-transition: height .4s;
+    -o-transition: height .4s;
+    -ms-transition: height .4s;
+    transition: height .4s;
 }
 
 .gridster .gs_w{
-  z-index: 2;
-  position: absolute;
-  background: rgba(0,0,0,.23);
-}
-
-.ready .gs_w:not(.player):not(.preview-holder):not(.ui-draggable-dragging) {
-  -webkit-transition: left .3s, top .3s;
-  -moz-transition: left .3s, top .3s;
-  -o-transition: left .3s, top .3s;
-}
-
-.gridster.dragging .ui-sortable-helper {
-  z-index: 9;
-}
-
-.gridster .preview-holder {
-    border: 2px dashed #333;
-    border-radius: 5px;
-    z-index: 1;
-    background:#FFF;
+    z-index: 2;
     position: absolute;
 }
 
-.gridster .ui-draggable-dragging {
-    z-index: 10!important;
+.ready .gs_w:not(.preview-holder) {
+    -webkit-transition: opacity .3s, left .3s, top .3s;
+    -moz-transition: opacity .3s, left .3s, top .3s;
+    -o-transition: opacity .3s, left .3s, top .3s;
+    transition: opacity .3s, left .3s, top .3s;
 }
 
- /*uncomment this if you draggable.helper option to "clone"*/
+.gridster .preview-holder {
+    z-index: 1;
+    position: absolute;
+    background-color: #fff;
+    border-color: #fff;
+    opacity: 0.3;
+}
+
+.gridster .player-revert {
+    z-index: 10!important;
+    -webkit-transition: left .3s, top .3s!important;
+    -moz-transition: left .3s, top .3s!important;
+    -o-transition: left .3s, top .3s!important;
+    transition:  left .3s, top .3s!important;
+}
+
+.gridster .dragging {
+    z-index: 10!important;
+    -webkit-transition: none!important;
+    -moz-transition: none!important;
+    -o-transition: none!important;
+    transition: none!important;
+}
+
+/* Uncomment this if you set helper : "clone" in draggable options */
 /*.gridster .player {
-  display: none!important;
+  opacity:0;
 }*/
diff --git a/dist/jquery.gridster.js b/dist/jquery.gridster.js
index a9c966a371..54497cffaf 100644
--- a/dist/jquery.gridster.js
+++ b/dist/jquery.gridster.js
@@ -1,10 +1,10 @@
-/*! gridster.js - v0.1.0 - 2012-07-20
+/*! gridster.js - v0.1.0 - 2012-07-23
 * https://github.com/ducksboard/gridster.js
 * Copyright (c) 2012 ducksboard; Licensed MIT, GPL */
 
 ;(function($, window, document, undefined){
     /**
-    * Coords description
+    * Coords
     *
     * @class Coords
     * @param {HTMLElement|Object} obj HTMLElement or a literal Object with the left, top, width and height properties.
@@ -30,12 +30,20 @@
         this.original_coords = this.get();
     };
 
-    fn.set = function() {
+
+    fn.set = function(update, not_update_offsets) {
         var el = this.el;
-        if (el) {
-            this.data = el.offset();
-            this.data.width || (this.data.width = el.width());
-            this.data.height || (this.data.height = el.height());
+
+        if (el && !update) {
+            this.data = {} || el.offset();
+            this.data.width = el.width();
+            this.data.height = el.height();
+        };
+
+        if (el && update && !not_update_offsets) {
+            var offset = el.offset();
+            this.data.top = offset.top;
+            this.data.left = offset.left;
         }
 
         var d = this.data;
@@ -53,19 +61,23 @@
         return this;
     };
 
+
     fn.update = function(data){
         if (!data && !this.el) {
             return this;
         }
 
         if (data) {
-            var new_data = $.extend(this.data, data);
+            var new_data = $.extend({}, this.data, data);
             this.data = new_data;
+            return this.set(true, true);
         }
-        this.set();
+
+        this.set(true);
         return this;
     };
 
+
     fn.get = function(){
         return this.coords;
     };
@@ -195,18 +207,18 @@
       }
     };
 
-    fn.find_collisions = function(){
+    fn.find_collisions = function(player_data_coords){
       var self = this;
       var colliders_coords = [];
       var colliders_data = [];
       var $colliders = (this.colliders || this.$colliders);
       var count = $colliders.length;
+      var player_coords = self.$element.coords().update(player_data_coords || false).get();
 
       while(count--){
         var $collider = self.$colliders ? $($colliders[count]) : $colliders[count];
-        var player_coords = self.$element.coords().update().get();
         var $collider_coords_ins = ($collider.isCoords) ?
-                $collider.update() : $collider.coords();
+                $collider : $collider.coords();
         var collider_coords = $collider_coords_ins.get();
         var overlaps = self.overlaps(player_coords, collider_coords);
 
@@ -246,8 +258,8 @@
     };
 
 
-    fn.get_closest_colliders = function(){
-      var colliders = this.find_collisions();
+    fn.get_closest_colliders = function(player_data_coords){
+      var colliders = this.find_collisions(player_data_coords);
       var min_area = 100;
       colliders.sort(function(a, b){
 
@@ -283,30 +295,9 @@
 
 }(jQuery, window, document));
 
-;(function($, window, document, undefined) {
-
-    var defaults = {
-        widget_selector: '> li',
-        widget_margins: [10, 10],
-        widget_base_dimensions: [400, 225],
-        extra_rows: 0,
-        extra_cols: 0,
-        min_cols: 1,
-        min_rows: 10,
-        autogenerate_stylesheet: true,
-        serialize_params: function($w, wgd) {
-            return {
-                col: wgd.col,
-                row: wgd.row
-            };
-        },
-        collision: {},
-        draggable: {}
-    };
-
-
+(function(window, undefined) {
     /* Debounce and throttle functions taken from underscore.js */
-    var debounce = function(func, wait, immediate) {
+    window.debounce = function(func, wait, immediate) {
         var timeout;
         return function() {
           var context = this, args = arguments;
@@ -321,10 +312,10 @@
     };
 
 
-    var throttle = function(func, wait) {
+    window.throttle = function(func, wait) {
         var context, args, timeout, throttling, more, result;
         var whenDone = debounce(
-            function(){ more = throttling = false; }, wait, true);
+            function(){ more = throttling = false; }, wait);
         return function() {
           context = this; args = arguments;
           var later = function() {
@@ -344,6 +335,248 @@
         };
     };
 
+})(window)
+
+;(function($, window, document, undefined){
+
+    var defaults = {
+        items: '.gs_w',
+        distance: 1,
+        limit: true,
+        offset_left: 0,
+        drag: function(e){},
+        start : function(e, ui){},
+        stop : function(e){}
+    };
+
+    var $body = $(document.body);
+
+
+    /**
+    * Draggable
+    *
+    * @class Draggable
+    * @constructor
+    */
+    function Draggable(element, options) {
+      this.options = $.extend(defaults, options);
+      this.$container = $(element);
+      this.$dragitems = $(this.options.items, this.$container);
+      this.is_dragging = false;
+      this.player_min_left = 0 + this.options.offset_left;
+
+      this.init();
+    };
+
+    var fn = Draggable.prototype;
+
+    fn.init = function() {
+        this.$container.css('position', 'relative');
+        this.enable();
+    };
+
+    fn.get_actual_pos = function($el) {
+        var pos = $el.position();
+        return pos;
+    };
+
+
+    fn.get_mouse_pos = function(e) {
+        return {
+            left: e.clientX,
+            top: e.clientY
+        };
+    };
+
+
+    fn.drag_handler = function(e) {
+        var self = this;
+        var first = true;
+        this.$player = $(e.currentTarget);
+
+        this.el_init_pos = this.get_actual_pos(this.$player);
+        this.mouse_init_pos = this.get_mouse_pos(e);
+
+        $body.on('mousemove.draggable', function(mme){
+            var mouse_actual_pos = self.get_mouse_pos(mme);
+            var diff_x = Math.abs(mouse_actual_pos.left - self.mouse_init_pos.left);
+            var diff_y = Math.abs(mouse_actual_pos.top - self.mouse_init_pos.top);
+            if (!(diff_x > self.options.distance || diff_y > self.options.distance)) {
+                return false;
+            }
+
+            if (first) {
+                first = false;
+                self.on_dragstart.call(self, mme);
+                return false;
+            }
+
+            if (self.is_dragging == true) {
+                throttle(self.on_dragmove.call(self, mme), 130);
+            };
+
+            return false;
+
+        });
+
+        return false;
+    };
+
+
+    fn.on_dragstart = function(e) {
+        e.preventDefault();
+        this.drag_start = true;
+        this.is_dragging = true;
+        this.$container_offset = this.$container.offset();
+        if (this.options.helper === 'clone') {
+            this.$helper = this.$player.clone().appendTo(this.$container).addClass('helper');
+            this.helper = true;
+        }else{
+            this.helper = false;
+        }
+        this.el_init_offset = this.$player.offset();
+        this.player_width = this.$player.width();
+        this.player_max_left = this.$container.width() - this.player_width + this.options.offset_left;
+        if (this.options.start) {
+            this.options.start.call(this.$player, e, {
+                helper: this.helper ? this.$helper : this.$player
+            });
+        };
+        return false;
+    };
+
+
+    fn.get_offset = function(e) {
+        e.preventDefault();
+        var mouse_actual_pos = this.get_mouse_pos(e);
+        var diff_x = mouse_actual_pos.left - this.mouse_init_pos.left;
+        var diff_y = mouse_actual_pos.top - this.mouse_init_pos.top;
+
+        var left = this.el_init_offset.left + diff_x - this.$container_offset.left;
+        var top = this.el_init_offset.top + diff_y - this.$container_offset.top;
+
+        if (this.options.limit) {
+            if (left > this.player_max_left) {
+                left = this.player_max_left;
+            }else if(left < this.player_min_left) {
+                left = this.player_min_left;
+            }
+        };
+
+        return {
+            left: left,
+            top: top
+        }
+    };
+
+
+    fn.on_dragmove = function(e) {
+        var offset = this.get_offset(e);
+
+        (this.helper ? this.$helper : this.$player).css({
+            'position': 'absolute',
+            'left' : offset.left,
+            'top' : offset.top
+        });
+
+        var ui = {
+            'position': {
+                'left': offset.left,
+                'top': offset.top
+            }
+        };
+
+        if (this.options.drag) {
+            this.options.drag.call(this.$player, e, ui);
+        }
+        return false;
+    };
+
+
+    fn.on_dragstop = function(e) {
+        var offset = this.get_offset(e);
+
+        this.drag_start = false;
+
+        var ui = {
+            'position': {
+                'left': offset.left,
+                'top': offset.top
+            }
+        }
+
+        if (this.options.stop) {
+            this.options.stop.call(this.$player, e, ui);
+        }
+
+        if (this.helper) {
+            this.$helper.remove();
+        }
+
+        return false;
+    };
+
+
+    fn.enable = function(){
+        this.$container.on('mousedown.draggable', this.options.items, $.proxy(this.drag_handler, this));
+        $body.on('mouseup.draggable', $.proxy(function(e) {
+            this.is_dragging = false;
+            $body.off('mousemove.draggable');
+            if (this.drag_start) {
+                this.on_dragstop(e);
+            }
+        }, this));
+    };
+
+
+    fn.disable = function(){
+        this.$container.off('mousedown.draggable');
+        $body.off('mouseup.draggable');
+    };
+
+
+    fn.destroy = function(){
+        this.disable();
+        $.removeData(this.$container, 'draggable');
+    };
+
+
+    //jQuery adapter
+    $.fn.draggable = function ( options ) {
+        return this.each(function () {
+            if (!$.data(this, 'draggable')) {
+                $.data(this, 'draggable', new Draggable( this, options ));
+            }
+        });
+    };
+
+
+}(jQuery, window, document));
+
+;(function($, window, document, undefined) {
+
+    var defaults = {
+        widget_selector: '> li',
+        widget_margins: [10, 10],
+        widget_base_dimensions: [400, 225],
+        extra_rows: 0,
+        extra_cols: 0,
+        min_cols: 1,
+        min_rows: 10,
+        autogenerate_stylesheet: true,
+        avoid_overlapped_widgets: true,
+        serialize_params: function($w, wgd) {
+            return {
+                col: wgd.col,
+                row: wgd.row
+            };
+        },
+        collision: {},
+        draggable: {
+            distance: 4
+        }
+    };
+
 
     /**
     * @class Gridster
@@ -401,6 +634,8 @@
       this.init();
     }
 
+    Gridster.generated_stylesheets = [];
+
     var fn = Gridster.prototype;
 
     fn.init = function() {
@@ -415,6 +650,31 @@
     };
 
 
+    /**
+    * Disable dragging.
+    *
+    * @method enable
+    * @return {Class} Returns the instance of the Gridster Class.
+    */
+    fn.disable = function(){
+        this.$wrapper.find('.player-revert').removeClass('player-revert');
+        this.drag_api.disable();
+        return this;
+    }
+
+
+    /**
+    * Enable dragging.
+    *
+    * @method enable
+    * @return {Class} Returns the instance of the Gridster Class.
+    */
+    fn.enable = function(){
+        this.drag_api.enable();
+        return this;
+    }
+
+
     /**
     * Add a new widget to the grid.
     *
@@ -422,7 +682,7 @@
     * @param {String} html The string representing the HTML of the widget.
     * @param {Number} size_x The nº of rows the widget occupies horizontally.
     * @param {Number} size_y The nº of columns the widget occupies vertically.
-    * @return {HTMLElement} Returns the jQuery wrapped HTMLElement representing
+    * @return {HTMLElement} Returns the jQuery wrapped HTMLElement representing.
     *  the widget that was just created.
     */
     fn.add_widget = function(html, size_x, size_y) {
@@ -439,12 +699,9 @@
 
         this.register_widget($w);
 
-        this.$widgets.draggable('destroy');
-        this.draggable();
-
         this.set_dom_grid_height();
 
-        $w.fadeIn();
+        return $w.fadeIn();
     };
 
 
@@ -504,7 +761,6 @@
         this.$widgets = this.$widgets.not($el);
 
         var $nexts = this.widgets_below($el);
-
         this.remove_from_gridmap(wgd);
 
         $el.fadeOut($.proxy(function(){
@@ -562,7 +818,8 @@
     * @return {Array} Returns the instance of the Gridster class.
     */
     fn.register_widget = function($el) {
-        var widget_grid_data = {
+
+        var wgd = {
             'col': parseInt($el.attr('data-col'), 10),
             'row': parseInt($el.attr('data-row'), 10),
             'size_x': parseInt($el.attr('data-sizex'), 10),
@@ -570,13 +827,27 @@
             'el': $el
         };
 
+        if (this.options.avoid_overlapped_widgets &&
+            !this.can_move_to(
+             { size_x: wgd.size_x, size_y: wgd.size_y }, wgd.col, wgd.row)
+        ) {
+            wgd = this.next_position(wgd.size_x, wgd.size_y);
+            wgd.el = $el;
+            $el.attr({
+                'data-col': wgd.col,
+                'data-row': wgd.row,
+                'data-sizex': wgd.size_x,
+                'data-sizey': wgd.size_y
+            });
+        };
+
         // attach Coord object to player data-coord attribute
         $el.data('coords', $el.coords());
 
         // Extend Coord object with grid position info
-        $el.data('coords').grid = widget_grid_data;
+        $el.data('coords').grid = wgd;
 
-        this.add_to_gridmap(widget_grid_data, $el);
+        this.add_to_gridmap(wgd, $el);
         this.widgets.push($el);
         return this;
     };
@@ -647,8 +918,10 @@
     fn.draggable = function() {
         var self = this;
         var draggable_options = $.extend(true, {}, this.options.draggable, {
-            // containment : this.$wrapper,
+            offset_left: this.options.widget_margins[0],
+            items: '.gs_w',
             start: function(event, ui) {
+                self.$widgets.filter('.player-revert').removeClass('player-revert');
                 self.$player = $(this);
                 self.$helper = self.options.draggable.helper === 'clone' ?
                     $(ui.helper) : self.$player;
@@ -658,16 +931,16 @@
                 self.$el.trigger('gridster:dragstart');
             },
             stop: function(event, ui) {
-                self.on_stop_drag.call(self, ui);
+                self.on_stop_drag.call(self, event, ui);
                 self.$el.trigger('gridster:dragstop');
             },
-            drag: throttle(function(event, ui) {
+            drag: function(event, ui) {
                 self.on_drag.call(self, event, ui);
                 self.$el.trigger('gridster:drag');
-            }, 100, true)
+            }
           });
 
-        this.$widgets.draggable(draggable_options);
+        this.drag_api = this.$el.draggable(draggable_options).data('draggable');
         return this;
     };
 
@@ -681,8 +954,10 @@
     *  See http://jqueryui.com/demos/draggable/ for more info.
     */
     fn.on_start_drag = function(event, ui) {
+
+        this.$helper.add(this.$player).add(this.$wrapper).addClass('dragging');
+
         this.$player.addClass('player');
-        this.$wrapper.addClass('dragging');
         this.player_grid_data = this.$player.coords().grid;
         this.placeholder_grid_data = $.extend({}, this.player_grid_data);
 
@@ -701,8 +976,9 @@
         this.last_cols = [];
         this.last_rows = [];
 
+
         // see jquery.collision.js
-        this.drag_api = this.$helper.collision(
+        this.collision_api = this.$helper.collision(
             colliders, this.options.collision);
 
         this.$preview_holder = $('<li />', {
@@ -730,7 +1006,11 @@
     *  See http://jqueryui.com/demos/draggable/ for more info.
     */
     fn.on_drag = function(event, ui) {
-        this.colliders_data = this.drag_api.get_closest_colliders();
+        var abs_offset = {
+            left: ui.position.left + this.baseX,
+            top: ui.position.top + this.baseY
+        }
+        this.colliders_data = this.collision_api.get_closest_colliders(abs_offset);
 
         this.on_overlapped_column_change(
             this.on_start_overlapping_column,
@@ -763,8 +1043,11 @@
     *  See http://jqueryui.com/demos/draggable/ for more info.
     */
     fn.on_stop_drag = function(event, ui) {
-        this.$wrapper.removeClass('dragging');
-        this.colliders_data = this.drag_api.get_closest_colliders();
+        this.$helper.add(this.$player).add(this.$wrapper).removeClass('dragging');
+
+        ui.position.left = ui.position.left + this.baseX;
+        ui.position.top = ui.position.top + this.baseY;
+        this.colliders_data = this.collision_api.get_closest_colliders(ui.position);
 
         this.on_overlapped_column_change(
             this.on_start_overlapping_column,
@@ -776,13 +1059,14 @@
             this.on_stop_overlapping_row
         );
 
-        this.$player.add(this.$helper).attr({
+        this.$player
+        .addClass('player-revert').removeClass('player').attr({
             'data-col': this.placeholder_grid_data.col,
             'data-row': this.placeholder_grid_data.row
         }).css({
             'left': '',
             'top': ''
-        }).removeClass('player');
+        });
 
         this.$changed = this.$changed.add(this.$player);
 
@@ -1276,12 +1560,21 @@
                 size_y: phgd.size_y,
                 size_x: phgd.size_x
             });
+
+        //Prevents widgets go out of the grid
+        var right_col = (col + phgd.size_x - 1);
+        if (right_col > this.cols) {
+            col = col - (right_col - col);
+        };
+
         var moved_down = this.placeholder_grid_data.row < row;
         var changed_column = this.placeholder_grid_data.col !== col;
 
         this.placeholder_grid_data.col = col;
         this.placeholder_grid_data.row = row;
 
+
+
         this.cells_occupied_by_placeholder = this.get_cells_occupied(
             this.placeholder_grid_data);
 
@@ -1631,24 +1924,28 @@
         var can_go_up = true;
         y_units || (y_units = 1);
 
-        if (!this.can_go_up($widget)) { return false; } //break;
+        // if (!this.can_go_up($widget)) { return false; } //break;
+        console.log($widget, y_units);
 
         this.for_each_column_occupied(el_grid_data, function(col){
             // can_go_up
             if ($.inArray($widget, moved) === -1) {
-                var widget_grid_data = $widget.coords().grid;
+                var widget_grid_data = $.extend({}, el_grid_data);
                 var next_row = actual_row - y_units;
                 next_row = this.can_go_up_to_row(widget_grid_data, col, next_row);
-                if (!next_row) {
+                console.log('can_go_up_to_row?', $widget, y_units, next_row);
+                if (next_row === false) {
                     return true;
                 }
 
                 var $next_widgets = this.widgets_below($widget);
+                console.log('$next_widgets', $next_widgets);
 
                 this.remove_from_gridmap(widget_grid_data);
                 widget_grid_data.row = next_row;
                 this.add_to_gridmap(widget_grid_data);
-                $widget.attr('data-row', widget_grid_data.row);
+                console.log($widget, 'next-row', next_row);
+                $widget.attr('data-row', next_row);
                 this.$changed = this.$changed.add($widget);
 
                 moved.push($widget);
@@ -1733,9 +2030,13 @@
 
             r = actual_row;
             while (r--){
-                if (this.is_empty(tcol, r) &&
-                    !this.is_placeholder_in(tcol, r)
+                var $w = this.is_widget(tcol, r);
+                console.log(tcol, r, $w, this.is_empty(tcol, r));
+                if ($w && $w.is(widget_grid_data.el) ||
+                    (this.is_empty(tcol, r) &&
+                    !this.is_placeholder_in(tcol, r))
                 ) {
+                    console.log('push', tcol, r);
                     urc[tcol].push(r);
                 }else{
                     break;
@@ -1749,6 +2050,8 @@
 
         });
 
+        console.log('urc', urc);
+
         if (!result) { return false; }
 
         //get common rows starting from upper position in all the columns widget occupies
@@ -1865,7 +2168,8 @@
         if (initial_row === 1) { return false; }
 
         this.for_each_column_occupied(el_grid_data, function(col){
-            if (this.is_occupied(col, prev_row) ||
+            if (!$el.is(this.is_widget(col, prev_row)) &&
+                this.is_occupied(col, prev_row) ||
                 this.is_player(col, prev_row) ||
                 this.is_placeholder_in(col, prev_row)
             ) {
@@ -1902,6 +2206,12 @@
         };
         var result = true;
 
+        //Prevents widgets go out of the grid
+        var right_col = col + widget_grid_data.size_x - 1;
+        if (right_col > this.cols) {
+            return false;
+        };
+
         this.for_each_cell_occupied(future_wd, function(tcol, trow){
             var $tw = this.is_widget(tcol, trow);
             if ($tw && (!widget_grid_data.el || $tw.is($w))) {
@@ -2146,6 +2456,33 @@
     };
 
 
+
+    fn.get_widgets_from = function(col, row) {
+        var ga = this.gridmap;
+        var $widgets = $();
+
+        if (col) {
+            $widgets = $widgets.add(
+                this.$widgets.filter(function(){
+                    var tcol = $(this).attr('data-col');
+                    return (tcol == col || tcol > col);
+                })
+            );
+        };
+
+        if (row) {
+            $widgets = $widgets.add(
+                this.$widgets.filter(function(){
+                    var trow = $(this).attr('data-row');
+                    return (trow == row || trow > row);
+                })
+            );
+        };
+
+        return $widgets;
+    }
+
+
     /**
     * Set the current height of the parent grid.
     *
@@ -2168,7 +2505,7 @@
     * @param {Number} cols Number of rows.
     * @return {Object} Returns the instance of the Gridster class.
     */
-    fn.generate_stylesheet = function(rows, cols) {
+    fn.generate_stylesheet = function(opts) {
         var styles = '';
         var extra_cells = 10;
         var max_size_y = 6;
@@ -2176,28 +2513,50 @@
         var i;
         var rules;
 
+        opts || (opts = {});
+        opts.cols || (opts.cols = this.cols);
+        opts.rows || (opts.rows = this.rows);
+        opts.namespace || (opts.namespace = '');
+        opts.widget_base_dimensions ||
+            (opts.widget_base_dimensions = this.options.widget_base_dimensions);
+        opts.widget_margins ||
+            (opts.widget_margins = this.options.widget_margins);
+        opts.min_widget_width = (opts.widget_margins[0] * 2) +
+            opts.widget_base_dimensions[0];
+        opts.min_widget_height = (opts.widget_margins[1] * 2) +
+            opts.widget_base_dimensions[1];
+
+        var serialized_opts = $.param(opts);
+        // don't duplicate stylesheets for the same configuration
+        if ($.inArray(serialized_opts, Gridster.generated_stylesheets) >= 0) {
+            return false;
+        };
+
+        Gridster.generated_stylesheets.push(serialized_opts);
+
         /* generate CSS styles for cols */
-        for (i = cols + extra_cells; i >= 0; i--) {
-            styles += '[data-col="'+ (i + 1) +'"] { left: ' +
-                      (i * this.min_widget_width) +
+        for (i = opts.cols + extra_cells; i >= 0; i--) {
+            styles += opts.namespace + ' [data-col="'+ (i + 1) +'"] { left: ' +
+                        ((i * opts.widget_base_dimensions[0]) + (i *opts.widget_margins[0]) + ((i+1) * opts.widget_margins[0])) +
                       'px;} ';
         }
 
         /* generate CSS styles for rows */
-        for (i = rows + extra_cells; i >= 0; i--) {
-            styles += '[data-row="' + (i + 1) + '"] { top: ' +
-                      (i * this.min_widget_height) + 'px;} ';
+        for (i = opts.rows + extra_cells; i >= 0; i--) {
+            styles += opts.namespace + ' [data-row="' + (i + 1) + '"] { top: ' +
+                      ((i * opts.widget_base_dimensions[1]) + (i * opts.widget_margins[1]) + ((i+1) * opts.widget_margins[1]) ) +
+                      'px;} ';
         }
 
 
         for (var y = 1; y < max_size_y; y++) {
-            styles += '[data-sizey="' + (y) + '"] { height: ' +
-                      (y * this.options.widget_base_dimensions[1] + (y-1)*(this.options.widget_margins[1]*2)) + 'px;}';
+            styles += opts.namespace + ' [data-sizey="' + (y) + '"] { height: ' +
+                      (y * opts.widget_base_dimensions[1] + (y-1)*(opts.widget_margins[1]*2)) + 'px;}';
         }
 
         for (var x = 1; x < max_size_x; x++) {
-            styles += '[data-sizex="' + (x) + '"] { width: ' +
-                      (x * this.options.widget_base_dimensions[0] + (x-1)*(this.options.widget_margins[0]*2)) + 'px;}';
+            styles += opts.namespace + ' [data-sizex="' + (x) + '"] { width: ' +
+                    (x * opts.widget_base_dimensions[0] + (x-1)*(opts.widget_margins[0]*2)) + 'px;}';
         }
 
         return this.add_style_tag(styles);
@@ -2328,19 +2687,19 @@
         var min_cols = Math.max.apply(null, actual_cols);
         var min_rows = Math.max.apply(null, actual_rows);
 
-        cols = Math.max(min_cols, cols, this.options.min_cols);
-        rows = Math.max(min_rows, rows, this.options.min_rows);
+        this.cols = Math.max(min_cols, cols, this.options.min_cols);
+        this.rows = Math.max(min_rows, rows, this.options.min_rows);
 
         this.baseX = ($(window).width() - aw) / 2;
         this.baseY = this.$wrapper.offset().top;
 
         if (this.options.autogenerate_stylesheet) {
-            this.generate_stylesheet(rows, cols);
+            this.generate_stylesheet();
         }
 
         /* more faux rows that needed are created so that there are cells
          * where drag beyond the limits */
-        return this.generate_faux_grid(rows, cols);
+        return this.generate_faux_grid(this.rows, this.cols);
     };
 
 
diff --git a/dist/jquery.gridster.min.css b/dist/jquery.gridster.min.css
index 332f0cacd5..7d676b6f5b 100644
--- a/dist/jquery.gridster.min.css
+++ b/dist/jquery.gridster.min.css
@@ -1,3 +1,3 @@
-/*! gridster.js - v0.1.0 - 2012-07-20
+/*! gridster.js - v0.1.0 - 2012-07-23
 * https://github.com/ducksboard/gridster.js
-* Copyright (c) 2012 ducksboard; Licensed MIT, GPL */.gridster{position:relative}.gridster>*{margin:0 auto;-webkit-transition:height .4s;-moz-transition:height .4s;-o-transition:height .4s;-ms-transition:height .4s;transition:height .4s}.gridster .gs_w{z-index:2;position:absolute;background:rgba(0,0,0,.23)}.ready .gs_w:not(.player):not(.preview-holder):not(.ui-draggable-dragging){-webkit-transition:left .3s,top .3s;-moz-transition:left .3s,top .3s;-o-transition:left .3s,top .3s}.gridster.dragging .ui-sortable-helper{z-index:9}.gridster .preview-holder{border:2px dashed #333;border-radius:5px;z-index:1;background:#FFF;position:absolute}.gridster .ui-draggable-dragging{z-index:10!important}
\ No newline at end of file
+* Copyright (c) 2012 ducksboard; Licensed MIT, GPL */.gridster{position:relative}.gridster>*{margin:0 auto;-webkit-transition:height .4s;-moz-transition:height .4s;-o-transition:height .4s;-ms-transition:height .4s;transition:height .4s}.gridster .gs_w{z-index:2;position:absolute}.ready .gs_w:not(.preview-holder){-webkit-transition:opacity .3s,left .3s,top .3s;-moz-transition:opacity .3s,left .3s,top .3s;-o-transition:opacity .3s,left .3s,top .3s;transition:opacity .3s,left .3s,top .3s}.gridster .preview-holder{z-index:1;position:absolute;background-color:#fff;border-color:#fff;opacity:.3}.gridster .player-revert{z-index:10!important;-webkit-transition:left .3s,top .3s!important;-moz-transition:left .3s,top .3s!important;-o-transition:left .3s,top .3s!important;transition:left .3s,top .3s!important}.gridster .dragging{-webkit-transition:none!important;-moz-transition:none!important;-o-transition:none!important;transition:none!important}
\ No newline at end of file
diff --git a/dist/jquery.gridster.min.js b/dist/jquery.gridster.min.js
index c22f589bec..bb48c41add 100644
--- a/dist/jquery.gridster.min.js
+++ b/dist/jquery.gridster.min.js
@@ -1,4 +1,4 @@
-/*! gridster.js - v0.1.0 - 2012-07-20
+/*! gridster.js - v0.1.0 - 2012-07-23
 * https://github.com/ducksboard/gridster.js
 * Copyright (c) 2012 ducksboard; Licensed MIT, GPL */
-(function(a,b,c,d){function e(b){return b[0]&&a.isPlainObject(b[0])?this.data=b[0]:this.el=b,this.isCoords=!0,this.coords={},this.init(),this}var f=e.prototype;f.init=function(){this.set(),this.original_coords=this.get()},f.set=function(){var a=this.el;a&&(this.data=a.offset(),this.data.width||(this.data.width=a.width()),this.data.height||(this.data.height=a.height()));var b=this.data;return this.coords.x1=b.left,this.coords.y1=b.top,this.coords.x2=b.left+b.width,this.coords.y2=b.top+b.height,this.coords.cx=b.left+b.width/2,this.coords.cy=b.top+b.height/2,this.coords.width=b.width,this.coords.height=b.height,this.coords.el=a||!1,this},f.update=function(b){if(!b&&!this.el)return this;if(b){var c=a.extend(this.data,b);this.data=c}return this.set(),this},f.get=function(){return this.coords},a.fn.coords=function(){if(this.data("coords"))return this.data("coords");var a=new e(this,arguments[0]);return this.data("coords",a),a}})(jQuery,window,document),function(a,b,c,d){function f(b,c,d){this.options=a.extend(e,d),this.$element=b,this.last_colliders=[],this.last_colliders_coords=[],typeof c=="string"||c instanceof jQuery?this.$colliders=a(c,this.options.colliders_context).not(this.$element):this.colliders=a(c),this.init()}var e={colliders_context:c.body,on_overlap:function(a){},on_overlap_start:function(a){},on_overlap_stop:function(a){}},g=f.prototype;g.init=function(){this.find_collisions()},g.overlaps=function(a,b){var c=!1,d=!1;if(b.x1>=a.x1&&b.x1<=a.x2||b.x2>=a.x1&&b.x2<=a.x2||a.x1>=b.x1&&a.x2<=b.x2)c=!0;if(b.y1>=a.y1&&b.y1<=a.y2||b.y2>=a.y1&&b.y2<=a.y2||a.y1>=b.y1&&a.y2<=b.y2)d=!0;return c&&d},g.detect_overlapping_region=function(a,b){var c="",d="";return a.y1>b.cy&&a.y1<b.y2&&(c="N"),a.y2>b.y1&&a.y2<b.cy&&(c="S"),a.x1>b.cx&&a.x1<b.x2&&(d="W"),a.x2>b.x1&&a.x2<b.cx&&(d="E"),c+d||"C"},g.calculate_overlapped_area_coords=function(b,c){var d=Math.max(b.x1,c.x1),e=Math.max(b.y1,c.y1),f=Math.min(b.x2,c.x2),g=Math.min(b.y2,c.y2);return a({left:d,top:e,width:f-d,height:g-e}).coords().get()},g.calculate_overlapped_area=function(a){return a.width*a.height},g.manage_colliders_start_stop=function(b,c,d){var e=this.last_colliders_coords;for(var f=0,g=e.length;f<g;f++)a.inArray(e[f],b)===-1&&c.call(this,e[f]);for(var h=0,i=b.length;h<i;h++)a.inArray(b[h],e)===-1&&d.call(this,b[h])},g.find_collisions=function(){var b=this,c=[],d=[],e=this.colliders||this.$colliders,f=e.length;while(f--){var g=b.$colliders?a(e[f]):e[f],h=b.$element.coords().update().get(),i=g.isCoords?g.update():g.coords(),j=i.get(),k=b.overlaps(h,j);if(!k)continue;var l=b.detect_overlapping_region(h,j);if(l==="C"){var m=b.calculate_overlapped_area_coords(h,j),n=b.calculate_overlapped_area(m),o={area:n,area_coords:m,region:l,coords:j,player_coords:h,el:g};b.options.on_overlap.call(this,o),c.push(i),d.push(o)}}return this.manage_colliders_start_stop(c,b.options.on_overlap_stop,b.options.on_overlap_start),this.last_colliders_coords=c,d},g.get_closest_colliders=function(){var a=this.find_collisions(),b=100;return a.sort(function(a,c){return a.area<=b?1:a.region==="C"&&c.region==="C"?a.coords.y1<c.coords.y1||a.coords.x1<c.coords.x1?-1:1:a.area<c.area?1:1}),a},a.fn.collision=function(a,b){return new f(this,a,b)}}(jQuery,window,document),function(a,b,c,d){function h(b,c){this.options=a.extend(!0,e,c),this.$el=a(b),this.$wrapper=this.$el.parent(),this.$widgets=this.$el.find(this.options.widget_selector).addClass("gs_w"),this.widgets=[],this.$changed=a([]),this.wrapper_width=this.$wrapper.width(),this.min_widget_width=this.options.widget_margins[0]*2+this.options.widget_base_dimensions[0],this.min_widget_height=this.options.widget_margins[1]*2+this.options.widget_base_dimensions[1],this.init()}var e={widget_selector:"> li",widget_margins:[10,10],widget_base_dimensions:[400,225],extra_rows:0,extra_cols:0,min_cols:1,min_rows:10,autogenerate_stylesheet:!0,serialize_params:function(a,b){return{col:b.col,row:b.row}},collision:{},draggable:{}},f=function(a,b,c){var d;return function(){var e=this,f=arguments,g=function(){d=null,c||a.apply(e,f)};c&&!d&&a.apply(e,f),clearTimeout(d),d=setTimeout(g,b)}},g=function(a,b){var c,d,e,g,h,i,j=f(function(){h=g=!1},b,!0);return function(){c=this,d=arguments;var f=function(){e=null,h&&a.apply(c,d),j()};return e||(e=setTimeout(f,b)),g?h=!0:i=a.apply(c,d),j(),g=!0,i}},i=h.prototype;i.init=function(){this.generate_grid_and_stylesheet(),this.get_widgets_from_DOM(),this.set_dom_grid_height(),this.$wrapper.addClass("ready"),this.draggable(),a(b).bind("resize",g(a.proxy(this.recalculate_faux_grid,this),200))},i.add_widget=function(b,c,d){var e=this.next_position(c,d),f=a(b).attr({"data-col":e.col,"data-row":e.row,"data-sizex":e.size_x,"data-sizey":e.size_y}).addClass("gs_w").appendTo(this.$el).hide();this.$widgets=this.$widgets.add(f),this.register_widget(f),this.$widgets.draggable("destroy"),this.draggable(),this.set_dom_grid_height(),f.fadeIn()},i.next_position=function(a,b){a||(a=1),b||(b=1);var c=this.gridmap,d=c.length,e=[];for(var f=1;f<d;f++){var g=c[f].length;for(var h=1;h<=g;h++){var i=this.can_move_to({size_x:a,size_y:b},f,h);i&&e.push({col:f,row:h,size_y:b,size_x:a})}}return e.length?this.sort_by_row_and_col_asc(e)[0]:!1},i.remove_widget=function(b,c){var d=b instanceof jQuery?b:a(b),e=d.coords().grid;this.$widgets=this.$widgets.not(d);var f=this.widgets_below(d);this.remove_from_gridmap(e),d.fadeOut(a.proxy(function(){d.remove(),f.each(a.proxy(function(b,c){this.move_widget_up(a(c),e.size_y)},this)),c&&c.apply(this,b)},this))},i.serialize=function(b){b||(b=this.$widgets);var c=[];return b.each(a.proxy(function(b,d){c.push(this.options.serialize_params(a(d),a(d).coords().grid))},this)),c},i.serialize_changed=function(){return this.serialize(this.$changed)},i.register_widget=function(a){var b={col:parseInt(a.attr("data-col"),10),row:parseInt(a.attr("data-row"),10),size_x:parseInt(a.attr("data-sizex"),10),size_y:parseInt(a.attr("data-sizey"),10),el:a};return a.data("coords",a.coords()),a.data("coords").grid=b,this.add_to_gridmap(b,a),this.widgets.push(a),this},i.update_widget_position=function(a,b){return this.for_each_cell_occupied(a,function(a,c){if(!this.gridmap[a])return this;this.gridmap[a][c]=b}),this},i.remove_from_gridmap=function(a){return this.update_widget_position(a,!1)},i.add_to_gridmap=function(b,c){this.update_widget_position(b,c||b.el);if(b.el){var d=this.widgets_below(b.el);d.each(a.proxy(function(b,c){this.move_widget_up(a(c))},this))}},i.draggable=function(){var b=this,c=a.extend(!0,{},this.options.draggable,{start:function(c,d){b.$player=a(this),b.$helper=b.options.draggable.helper==="clone"?a(d.helper):b.$player,b.helper=!b.$helper.is(b.$player),b.on_start_drag.call(b,c,d),b.$el.trigger("gridster:dragstart")},stop:function(a,c){b.on_stop_drag.call(b,c),b.$el.trigger("gridster:dragstop")},drag:g(function(a,c){b.on_drag.call(b,a,c),b.$el.trigger("gridster:drag")},100,!0)});return this.$widgets.draggable(c),this},i.on_start_drag=function(b,c){this.$player.addClass("player"),this.$wrapper.addClass("dragging"),this.player_grid_data=this.$player.coords().grid,this.placeholder_grid_data=a.extend({},this.player_grid_data),this.$el.css("height",this.$el.height()+this.player_grid_data.size_y*this.min_widget_height);var d=this.faux_grid,e=this.$player.data("coords").coords;this.cells_occupied_by_player=this.get_cells_occupied(this.player_grid_data),this.cells_occupied_by_placeholder=this.get_cells_occupied(this.placeholder_grid_data),this.last_cols=[],this.last_rows=[],this.drag_api=this.$helper.collision(d,this.options.collision),this.$preview_holder=a("<li />",{"class":"preview-holder","data-row":this.$player.attr("data-row"),"data-col":this.$player.attr("data-col"),css:{width:e.width,height:e.height}}).appendTo(this.$el),this.options.draggable.start&&this.options.draggable.start.call(this,b,c)},i.on_drag=function(a,b){this.colliders_data=this.drag_api.get_closest_colliders(),this.on_overlapped_column_change(this.on_start_overlapping_column,this.on_stop_overlapping_column),this.on_overlapped_row_change(this.on_start_overlapping_row,this.on_stop_overlapping_row),this.helper&&this.$player&&this.$player.css({left:b.position.left,top:b.position.top}),this.options.draggable.drag&&this.options.draggable.drag.call(this,a,b)},i.on_stop_drag=function(a,b){this.$wrapper.removeClass("dragging"),this.colliders_data=this.drag_api.get_closest_colliders(),this.on_overlapped_column_change(this.on_start_overlapping_column,this.on_stop_overlapping_column),this.on_overlapped_row_change(this.on_start_overlapping_row,this.on_stop_overlapping_row),this.$player.add(this.$helper).attr({"data-col":this.placeholder_grid_data.col,"data-row":this.placeholder_grid_data.row}).css({left:"",top:""}).removeClass("player"),this.$changed=this.$changed.add(this.$player),this.cells_occupied_by_player=this.get_cells_occupied(this.placeholder_grid_data),this.set_cells_player_occupies(this.placeholder_grid_data.col,this.placeholder_grid_data.row),this.$player.coords().grid.row=this.placeholder_grid_data.row,this.$player.coords().grid.col=this.placeholder_grid_data.col,this.$player=null,this.$preview_holder.remove(),this.set_dom_grid_height(),this.options.draggable.stop&&this.options.draggable.stop.call(this,a,b)},i.on_overlapped_column_change=function(b,c){if(!this.colliders_data.length)return;var d=this.get_targeted_columns(this.colliders_data[0].el.data.col),e=this.last_cols.length,f=d.length,g;for(g=0;g<f;g++)a.inArray(d[g],this.last_cols)===-1&&(b||a.noop).call(this,d[g]);for(g=0;g<e;g++)a.inArray(this.last_cols[g],d)===-1&&(c||a.noop).call(this,this.last_cols[g]);return this.last_cols=d,this},i.on_overlapped_row_change=function(b,c){if(!this.colliders_data.length)return;var d=this.get_targeted_rows(this.colliders_data[0].el.data.row),e=this.last_rows.length,f=d.length,g;for(g=0;g<f;g++)a.inArray(d[g],this.last_rows)===-1&&(b||a.noop).call(this,d[g]);for(g=0;g<e;g++)a.inArray(this.last_rows[g],d)===-1&&(c||a.noop).call(this,this.last_rows[g]);this.last_rows=d},i.set_player=function(a,b){this.empty_cells_player_occupies();var c=this,d=c.colliders_data[0].el.data,e=d.col,f=b||d.row;this.player_grid_data={col:e,row:f,size_y:this.player_grid_data.size_y,size_x:this.player_grid_data.size_x},this.cells_occupied_by_player=this.get_cells_occupied(this.player_grid_data);var g=this.get_widgets_overlapped(this.player_grid_data),h=this.widgets_constraints(g);this.manage_movements(h.can_go_up,e,f),this.manage_movements(h.can_not_go_up,e,f);if(!g.length){var i=this.can_go_player_up(this.player_grid_data);i!==!1&&(f=i),this.set_placeholder(e,f)}return{col:e,row:f}},i.widgets_constraints=function(b){var c=a([]),d,e=[],f=[];return b.each(a.proxy(function(b,d){var g=a(d),h=g.coords().grid;this.can_go_widget_up(h)?(c=c.add(g),e.push(h)):f.push(h)},this)),d=b.not(c),{can_go_up:this.sort_by_row_asc(e),can_not_go_up:this.sort_by_row_desc(f)}},i.sort_by_row_asc=function(a){return a=a.sort(function(a,b){return a.row>b.row?1:-1}),a},i.sort_by_row_and_col_asc=function(a){return a=a.sort(function(a,b){return a.row>b.row||a.row==b.row&&a.col>b.col?1:-1}),a},i.sort_by_col_asc=function(a){return a=a.sort(function(a,b){return a.col>b.col?1:-1}),a},i.sort_by_row_desc=function(a){return a=a.sort(function(a,b){return a.row+a.size_y<b.row+b.size_y?1:-1}),a},i.manage_movements=function(b,c,d){return a.each(b,a.proxy(function(a,b){var e=b,f=e.el,g=this.can_go_widget_up(e);if(g)this.move_widget_to(f,g),this.set_placeholder(c,g+e.size_y);else{var h=this.can_go_player_up(this.player_grid_data);if(!h){var i=d+this.player_grid_data.size_y-e.row;this.move_widget_down(f,i),this.set_placeholder(c,d)}}},this)),this},i.is_player=function(a,b){if(b&&!this.gridmap[a])return!1;var c=b?this.gridmap[a][b]:a;return c&&(c.is(this.$player)||c.is(this.$helper))},i.is_player_in=function(b,c){var d=this.cells_occupied_by_player;return a.inArray(b,d.cols)>=0&&a.inArray(c,d.rows)>=0},i.is_placeholder_in=function(b,c){var d=this.cells_occupied_by_placeholder||[];return this.is_placeholder_in_col(b)&&a.inArray(c,d.rows)>=0},i.is_placeholder_in_col=function(b){var c=this.cells_occupied_by_placeholder||[];return a.inArray(b,c.cols)>=0},i.is_empty=function(a,b){return typeof this.gridmap[a]!="undefined"&&typeof this.gridmap[a][b]!="undefined"&&this.gridmap[a][b]===!1?!0:!1},i.is_occupied=function(a,b){return this.gridmap[a]?this.gridmap[a][b]?!0:!1:!1},i.is_widget=function(a,b){var c=this.gridmap[a];return c?(c=c[b],c?c:!1):!1},i.is_widget_under_player=function(a,b){return this.is_widget(a,b)?this.is_player_in(a,b):!1},i.get_widgets_under_player=function(){var b=this.cells_occupied_by_player,c=a([]);return a.each(b.cols,a.proxy(function(d,e){a.each(b.rows,a.proxy(function(a,b){this.is_widget(e,b)&&(c=c.add(this.gridmap[e][b]))},this))},this)),c},i.set_placeholder=function(b,c){var d=a.extend({},this.placeholder_grid_data),e=this.widgets_below({col:d.col,row:d.row,size_y:d.size_y,size_x:d.size_x}),f=this.placeholder_grid_data.row<c,g=this.placeholder_grid_data.col!==b;this.placeholder_grid_data.col=b,this.placeholder_grid_data.row=c,this.cells_occupied_by_placeholder=this.get_cells_occupied(this.placeholder_grid_data),this.$preview_holder.attr({"data-row":c,"data-col":b}),(f||g)&&e.each(a.proxy(function(c,e){this.move_widget_up(a(e),this.placeholder_grid_data.col-b+d.size_y)},this))},i.can_go_player_up=function(a){var b=a.row+a.size_y-1,c=!0,d=[],e=1e4,f=this.get_widgets_under_player();return this.for_each_column_occupied(a,function(a){var g=this.gridmap[a],h=b+1;d[a]=[];while(--h>0)if(this.is_empty(a,h)||this.is_player(a,h)||this.is_widget(a,h)&&g[h].is(f))d[a].push(h),e=h<e?h:e;else break;if(d[a].length===0)return c=!1,!0;d[a].sort()}),c?this.get_valid_rows(a,d,e):!1},i.can_go_widget_up=function(a){var b=a.row+a.size_y-1,c=!0,d=[],e=1e4;return this.for_each_column_occupied(a,function(a){var f=this.gridmap[a];d[a]=[];var g=b+1;while(--g>0){if(this.is_occupied(a,g)&&!this.is_player(a,g))break;!this.is_player(a,g)&&!this.is_placeholder_in(a,g)&&d[a].push(g),g<e&&(e=g)}if(d[a].length===0)return c=!1,!0;d[a].sort()}),c?this.get_valid_rows(a,d,e):!1},i.get_valid_rows=function(b,c,d){var e=b.row,f=b.row+b.size_y-1,g=b.size_y,h=d-1,i=[];while(++h<=f){var j=!0;a.each(c,function(b,c){c&&a.inArray(h,c)===-1&&(j=!1)});if(j===!0){i.push(h);if(i.length===g)break}}var k=!1;return g===1?i[0]!==e&&(k=i[0]||!1):i[0]!==e&&(k=this.get_consecutive_numbers_index(i,g)),k},i.get_consecutive_numbers_index=function(a,b){var c=a.length,d=[],e=!0,f=-1;for(var g=0;g<c;g++){if(e||a[g]===f+1){d.push(g);if(d.length===b)break;e=!1}else d=[],e=!0;f=a[g]}return d.length>=b?a[d[0]]:!1},i.get_widgets_overlapped=function(){var b,c=a([]),d=[],e=this.cells_occupied_by_player.rows.slice(0);return e.reverse(),a.each(this.cells_occupied_by_player.cols,a.proxy(function(b,f){a.each(e,a.proxy(function(b,e){if(!this.gridmap[f])return!0;var g=this.gridmap[f][e];this.is_occupied(f,e)&&!this.is_player(g)&&a.inArray(g,d)===-1&&(c=c.add(g),d.push(g))},this))},this)),c},i.on_start_overlapping_column=function(a){this.set_player(a,!1)},i.on_start_overlapping_row=function(a){this.set_player(!1,a)},i.on_stop_overlapping_column=function(a){this.set_player();var b=this;this.for_each_widget_below(a,this.cells_occupied_by_player.rows[0],function(a,c){b.move_widget_up(this,b.player_grid_data.size_y)})},i.on_stop_overlapping_row=function(a){this.set_player();var b=this,c=this.cells_occupied_by_player.cols;for(var d=0,e=c.length;d<e;d++)this.for_each_widget_below(c[d],a,function(a,c){b.move_widget_up(this,b.player_grid_data.size_y)})},i.move_widget_to=function(b,c){var d=this,e=b.coords().grid,f=c-e.row,g=this.widgets_below(b),h=this.can_move_to(e,e.col,c,b);return h===!1?!1:(this.remove_from_gridmap(e),e.row=c,this.add_to_gridmap(e),b.attr("data-row",c),this.$changed=this.$changed.add(b),g.each(function(b,c){var e=a(c),f=e.coords().grid,g=d.can_go_widget_up(f);g&&g!==f.row&&d.move_widget_to(e,g)}),this)},i.move_widget_up=function(b,c){var d=b.coords().grid,e=d.row,f=[],g=!0;c||(c=1);if(!this.can_go_up(b))return!1;this.for_each_column_occupied(d,function(d){if(a.inArray(b,f)===-1){var g=b.coords().grid,h=e-c;h=this.can_go_up_to_row(g,d,h);if(!h)return!0;var i=this.widgets_below(b);this.remove_from_gridmap(g),g.row=h,this.add_to_gridmap(g),b.attr("data-row",g.row),this.$changed=this.$changed.add(b),f.push(b),i.each(a.proxy(function(b,d){this.move_widget_up(a(d),c)},this))}})},i.move_widget_down=function(b,c){var d=b.coords().grid,e=d.row,f=[],g=c;if(!b)return!1;if(a.inArray(b,f)===-1){var h=b.coords().grid,i=e+c,j=this.widgets_below(b);this.remove_from_gridmap(h),j.each(a.proxy(function(b,c){var d=a(c),e=d.coords().grid,f=this.displacement_diff(e,h,g);f>0&&this.move_widget_down(d,f)},this)),h.row=i,this.update_widget_position(h,b),b.attr("data-row",h.row),this.$changed=this.$changed.add(b),f.push(b)}},i.can_go_up_to_row=function(b,c,d){var e=this.gridmap,f=!0,g=[],h=b.row,i;this.for_each_column_occupied(b,function(a){var b=e[a];g[a]=[],i=h;while(i--)if(this.is_empty(a,i)&&!this.is_placeholder_in(a,i))g[a].push(i);else break;if(!g[a].length)return f=!1,!0});if(!f)return!1;i=d;for(i=1;i<h;i++){var j=!0;for(var k=0,l=g.length;k<l;k++)g[k]&&a.inArray(i,g[k])===-1&&(j=!1);if(j===!0){f=i;break}}return f},i.displacement_diff=function(a,b,c){var d=a.row,e=[],f=b.row+b.size_y;this.for_each_column_occupied(a,function(a){var b=0;for(var c=f;c<d;c++)this.is_empty(a,c)&&(b=b+1);e.push(b)});var g=Math.max.apply(null,e);return c=c-g,c>0?c:0},i.widgets_below=function(b){var c=a.isPlainObject(b)?b:b.coords().grid,d=this,e=this.gridmap,f=c.row+c.size_y-1,g=a([]);return this.for_each_column_occupied(c,function(b){d.for_each_widget_below(b,f,function(b,c){if(!d.is_player(this)&&a.inArray(this,g)===-1)return g=g.add(this),!0})}),this.sort_by_row_asc(g)},i.set_cells_player_occupies=function(a,b){return this.remove_from_gridmap(this.placeholder_grid_data),this.placeholder_grid_data.col=a,this.placeholder_grid_data.row=b,this.add_to_gridmap(this.placeholder_grid_data,this.$player),this},i.empty_cells_player_occupies=function(){return this.remove_from_gridmap(this.placeholder_grid_data),this},i.can_go_up=function(a){var b=a.coords().grid,c=b.row,d=c-1,e=this.gridmap,f=[],g=!0;return c===1?!1:(this.for_each_column_occupied(b,function(a){if(this.is_occupied(a,d)||this.is_player(a,d)||this.is_placeholder_in(a,d))return g=!1,!0}),g)},i.can_move_to=function(a,b,c){var d=this.gridmap,e=a.el,f={size_y:a.size_y,size_x:a.size_x,col:b,row:c},g=!0;return this.for_each_cell_occupied(f,function(b,c){var d=this.is_widget(b,c);d&&(!a.el||d.is(e))&&(g=!1)}),g},i.get_targeted_columns=function(a){var b=(a||this.player_grid_data.col)+(this.player_grid_data.size_x-1),c=[];for(var d=a;d<=b;d++)c.push(d);return c},i.get_targeted_rows=function(a){var b=(a||this.player_grid_data.row)+(this.player_grid_data.size_y-1),c=[];for(var d=a;d<=b;d++)c.push(d);return c},i.get_cells_occupied=function(a){var b={cols:[],rows:[]},c;arguments[1]instanceof jQuery&&(a=arguments[1].coords().grid);for(c=0;c<a.size_x;c++){var d=a.col+c;b.cols.push(d)}for(c=0;c<a.size_y;c++){var e=a.row+c;b.rows.push(e)}return b},i.for_each_cell_occupied=function(a,b){return this.for_each_column_occupied(a,function(c){this.for_each_row_occupied(a,function(a){b.call(this,c,a)})}),this},i.for_each_column_occupied=function(a,b){for(var c=0;c<a.size_x;c++){var d=a.col+c;b.call(this,d,a)}},i.for_each_row_occupied=function(a,b){for(var c=0;c<a.size_y;c++){var d=a.row+c;b.call(this,d,a)}},i._traversing_widgets=function(b,c,d,e,f){var g=this.gridmap;if(!g[d])return;var h,i,j=b+"/"+c;if(arguments[2]instanceof jQuery){var k=arguments[2].coords().grid;d=k.col,e=k.row,f=arguments[3]}var l=[],m=e,n={"for_each/above":function(){while(m--)if(m>0&&this.is_widget(d,m)&&a.inArray(g[d][m],l)===-1){h=f.call(g[d][m],d,m),l.push(g[d][m]);if(h)break}},"for_each/below":function(){for(m=e+1,i=g[d].length;m<i;m++)if(this.is_widget(d,m)&&a.inArray(g[d][m],l)===-1){h=f.call(g[d][m],d,m),l.push(g[d][m]);if(h)break}}};n[j]&&n[j].call(this)},i.for_each_widget_above=function(a,b,c){return this._traversing_widgets("for_each","above",a,b,c),this},i.for_each_widget_below=function(a,b,c){return this._traversing_widgets("for_each","below",a,b,c),this},i.get_highest_occupied_cell=function(){var a,b=this.gridmap,c=[],d=[];for(var e=b.length-1;e>=1;e--)for(a=b[e].length-1;a>=1;a--)if(this.is_widget(e,a)){c.push(a),d[a]=e;break}var f=Math.max.apply(null,c);return this.highest_occupied_cell={col:d[f],row:f},this.highest_occupied_cell},i.set_dom_grid_height=function(){var a=this.get_highest_occupied_cell().row;return this.$el.css("height",a*this.min_widget_height),this},i.generate_stylesheet=function(a,b){var c="",d=10,e=6,f=6,g,h;for(g=b+d;g>=0;g--)c+='[data-col="'+(g+1)+'"] { left: '+g*this.min_widget_width+"px;} ";for(g=a+d;g>=0;g--)c+='[data-row="'+(g+1)+'"] { top: '+g*this.min_widget_height+"px;} ";for(var i=1;i<e;i++)c+='[data-sizey="'+i+'"] { height: '+(i*this.options.widget_base_dimensions[1]+(i-1)*this.options.widget_margins[1]*2)+"px;}";for(var j=1;j<f;j++)c+='[data-sizex="'+j+'"] { width: '+(j*this.options.widget_base_dimensions[0]+(j-1)*this.options.widget_margins[0]*2)+"px;}";return this.add_style_tag(c)},i.add_style_tag=function(a){var b=c,d=b.createElement("style");return b.getElementsByTagName("head")[0].appendChild(d),d.setAttribute("type","text/css"),d.styleSheet?d.styleSheet.cssText=a:d.appendChild(c.createTextNode(a)),this},i.generate_faux_grid=function(b,c){this.faux_grid=[],this.gridmap=[];var d,e;for(d=c;d>0;d--){this.gridmap[d]=[];for(e=b;e>0;e--){var f=a({left:this.baseX+(d-1)*this.min_widget_width,top:this.baseY+(e-1)*this.min_widget_height,width:this.min_widget_width,height:this.min_widget_height,col:d,row:e,original_col:d,original_row:e}).coords();this.gridmap[d][e]=!1,this.faux_grid.push(f)}}return this},i.recalculate_faux_grid=function(){var c=this.$wrapper.width();return this.baseX=(a(b).width()-c)/2,this.baseY=this.$wrapper.offset().top,a.each(this.faux_grid,a.proxy(function(a,b){this.faux_grid[a]=b.update({left:this.baseX+(b.data.col-1)*this.min_widget_width,top:this.baseY+(b.data.row-1)*this.min_widget_height})},this)),this},i.get_widgets_from_DOM=function(){return this.$widgets.each(a.proxy(function(b,c){this.register_widget(a(c))},this)),this},i.generate_grid_and_stylesheet=function(){var c=this.$wrapper.width(),d=this.$wrapper.height(),e=Math.floor(c/this.min_widget_width)+this.options.extra_cols,f=Math.floor(d/this.min_widget_height)+this.options.extra_rows,g=this.$widgets.map(function(){return a(this).attr("data-col")}),h=this.$widgets.map(function(){return a(this).attr("data-row")}),i=Math.max.apply(null,g),j=Math.max.apply(null,h);return e=Math.max(i,e,this.options.min_cols),f=Math.max(j,f,this.options.min_rows),this.baseX=(a(b).width()-c)/2,this.baseY=this.$wrapper.offset().top,this.options.autogenerate_stylesheet&&this.generate_stylesheet(f,e),this.generate_faux_grid(f,e)},a.fn.gridster=function(b){return this.each(function(){a(this).data("gridster")||a(this).data("gridster",new h(this,b))})}}(jQuery,window,document);
\ No newline at end of file
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this.data("coords",a),a}})(jQuery,window,document),function(a,b,c,d){function f(b,c,d){this.options=a.extend(e,d),this.$element=b,this.last_colliders=[],this.last_colliders_coords=[],typeof c=="string"||c instanceof jQuery?this.$colliders=a(c,this.options.colliders_context).not(this.$element):this.colliders=a(c),this.init()}var e={colliders_context:c.body,on_overlap:function(a){},on_overlap_start:function(a){},on_overlap_stop:function(a){}},g=f.prototype;g.init=function(){this.find_collisions()},g.overlaps=function(a,b){var c=!1,d=!1;if(b.x1>=a.x1&&b.x1<=a.x2||b.x2>=a.x1&&b.x2<=a.x2||a.x1>=b.x1&&a.x2<=b.x2)c=!0;if(b.y1>=a.y1&&b.y1<=a.y2||b.y2>=a.y1&&b.y2<=a.y2||a.y1>=b.y1&&a.y2<=b.y2)d=!0;return c&&d},g.detect_overlapping_region=function(a,b){var c="",d="";return a.y1>b.cy&&a.y1<b.y2&&(c="N"),a.y2>b.y1&&a.y2<b.cy&&(c="S"),a.x1>b.cx&&a.x1<b.x2&&(d="W"),a.x2>b.x1&&a.x2<b.cx&&(d="E"),c+d||"C"},g.calculate_overlapped_area_coords=function(b,c){var d=Math.max(b.x1,c.x1),e=Math.max(b.y1,c.y1),f=Math.min(b.x2,c.x2),g=Math.min(b.y2,c.y2);return a({left:d,top:e,width:f-d,height:g-e}).coords().get()},g.calculate_overlapped_area=function(a){return a.width*a.height},g.manage_colliders_start_stop=function(b,c,d){var e=this.last_colliders_coords;for(var f=0,g=e.length;f<g;f++)a.inArray(e[f],b)===-1&&c.call(this,e[f]);for(var h=0,i=b.length;h<i;h++)a.inArray(b[h],e)===-1&&d.call(this,b[h])},g.find_collisions=function(b){var c=this,d=[],e=[],f=this.colliders||this.$colliders,g=f.length,h=c.$element.coords().update(b||!1).get();while(g--){var i=c.$colliders?a(f[g]):f[g],j=i.isCoords?i:i.coords(),k=j.get(),l=c.overlaps(h,k);if(!l)continue;var m=c.detect_overlapping_region(h,k);if(m==="C"){var n=c.calculate_overlapped_area_coords(h,k),o=c.calculate_overlapped_area(n),p={area:o,area_coords:n,region:m,coords:k,player_coords:h,el:i};c.options.on_overlap.call(this,p),d.push(j),e.push(p)}}return this.manage_colliders_start_stop(d,c.options.on_overlap_stop,c.options.on_overlap_start),this.last_colliders_coords=d,e},g.get_closest_colliders=function(a){var b=this.find_collisions(a),c=100;return b.sort(function(a,b){return a.area<=c?1:a.region==="C"&&b.region==="C"?a.coords.y1<b.coords.y1||a.coords.x1<b.coords.x1?-1:1:a.area<b.area?1:1}),b},a.fn.collision=function(a,b){return new f(this,a,b)}}(jQuery,window,document),function(a,b){a.debounce=function(a,b,c){var d;return function(){var e=this,f=arguments,g=function(){d=null,c||a.apply(e,f)};c&&!d&&a.apply(e,f),clearTimeout(d),d=setTimeout(g,b)}},a.throttle=function(a,b){var c,d,e,f,g,h,i=debounce(function(){g=f=!1},b);return function(){c=this,d=arguments;var j=function(){e=null,g&&a.apply(c,d),i()};return e||(e=setTimeout(j,b)),f?g=!0:h=a.apply(c,d),i(),f=!0,h}}}(window),function(a,b,c,d){function g(b,c){this.options=a.extend(e,c),this.$container=a(b),this.$dragitems=a(this.options.items,this.$container),this.is_dragging=!1,this.player_min_left=0+this.options.offset_left,this.init()}var e={items:".gs_w",distance:1,limit:!0,offset_left:0,drag:function(a){},start:function(a,b){},stop:function(a){}},f=a(c.body),h=g.prototype;h.init=function(){this.$container.css("position","relative"),this.enable()},h.get_actual_pos=function(a){var b=a.position();return b},h.get_mouse_pos=function(a){return{left:a.clientX,top:a.clientY}},h.drag_handler=function(b){var c=this,d=!0;return this.$player=a(b.currentTarget),this.el_init_pos=this.get_actual_pos(this.$player),this.mouse_init_pos=this.get_mouse_pos(b),f.on("mousemove.draggable",function(a){var b=c.get_mouse_pos(a),e=Math.abs(b.left-c.mouse_init_pos.left),f=Math.abs(b.top-c.mouse_init_pos.top);return e>c.options.distance||f>c.options.distance?d?(d=!1,c.on_dragstart.call(c,a),!1):(c.is_dragging==!0&&throttle(c.on_dragmove.call(c,a),130),!1):!1}),!1},h.on_dragstart=function(a){return a.preventDefault(),this.drag_start=!0,this.is_dragging=!0,this.$container_offset=this.$container.offset(),this.options.helper==="clone"?(this.$helper=this.$player.clone().appendTo(this.$container).addClass("helper"),this.helper=!0):this.helper=!1,this.el_init_offset=this.$player.offset(),this.player_width=this.$player.width(),this.player_max_left=this.$container.width()-this.player_width+this.options.offset_left,this.options.start&&this.options.start.call(this.$player,a,{helper:this.helper?this.$helper:this.$player}),!1},h.get_offset=function(a){a.preventDefault();var b=this.get_mouse_pos(a),c=b.left-this.mouse_init_pos.left,d=b.top-this.mouse_init_pos.top,e=this.el_init_offset.left+c-this.$container_offset.left,f=this.el_init_offset.top+d-this.$container_offset.top;return this.options.limit&&(e>this.player_max_left?e=this.player_max_left:e<this.player_min_left&&(e=this.player_min_left)),{left:e,top:f}},h.on_dragmove=function(a){var b=this.get_offset(a);(this.helper?this.$helper:this.$player).css({position:"absolute",left:b.left,top:b.top});var c={position:{left:b.left,top:b.top}};return this.options.drag&&this.options.drag.call(this.$player,a,c),!1},h.on_dragstop=function(a){var b=this.get_offset(a);this.drag_start=!1;var c={position:{left:b.left,top:b.top}};return this.options.stop&&this.options.stop.call(this.$player,a,c),this.helper&&this.$helper.remove(),!1},h.enable=function(){this.$container.on("mousedown.draggable",this.options.items,a.proxy(this.drag_handler,this)),f.on("mouseup.draggable",a.proxy(function(a){this.is_dragging=!1,f.off("mousemove.draggable"),this.drag_start&&this.on_dragstop(a)},this))},h.disable=function(){this.$container.off("mousedown.draggable"),f.off("mouseup.draggable")},h.destroy=function(){this.disable(),a.removeData(this.$container,"draggable")},a.fn.draggable=function(b){return this.each(function(){a.data(this,"draggable")||a.data(this,"draggable",new g(this,b))})}}(jQuery,window,document),function(a,b,c,d){function f(b,c){this.options=a.extend(!0,e,c),this.$el=a(b),this.$wrapper=this.$el.parent(),this.$widgets=this.$el.find(this.options.widget_selector).addClass("gs_w"),this.widgets=[],this.$changed=a([]),this.wrapper_width=this.$wrapper.width(),this.min_widget_width=this.options.widget_margins[0]*2+this.options.widget_base_dimensions[0],this.min_widget_height=this.options.widget_margins[1]*2+this.options.widget_base_dimensions[1],this.init()}var e={widget_selector:"> li",widget_margins:[10,10],widget_base_dimensions:[400,225],extra_rows:0,extra_cols:0,min_cols:1,min_rows:10,autogenerate_stylesheet:!0,avoid_overlapped_widgets:!0,serialize_params:function(a,b){return{col:b.col,row:b.row}},collision:{},draggable:{distance:4}};f.generated_stylesheets=[];var g=f.prototype;g.init=function(){this.generate_grid_and_stylesheet(),this.get_widgets_from_DOM(),this.set_dom_grid_height(),this.$wrapper.addClass("ready"),this.draggable(),a(b).bind("resize",throttle(a.proxy(this.recalculate_faux_grid,this),200))},g.disable=function(){return this.drag_api.disable(),this},g.enable=function(){return this.drag_api.enable(),this},g.add_widget=function(b,c,d){var e=this.next_position(c,d),f=a(b).attr({"data-col":e.col,"data-row":e.row,"data-sizex":e.size_x,"data-sizey":e.size_y}).addClass("gs_w").appendTo(this.$el).hide();return this.$widgets=this.$widgets.add(f),this.register_widget(f),this.set_dom_grid_height(),f.fadeIn()},g.next_position=function(a,b){a||(a=1),b||(b=1);var c=this.gridmap,d=c.length,e=[];for(var f=1;f<d;f++){var g=c[f].length;for(var h=1;h<=g;h++){var i=this.can_move_to({size_x:a,size_y:b},f,h);i&&e.push({col:f,row:h,size_y:b,size_x:a})}}return e.length?this.sort_by_row_and_col_asc(e)[0]:!1},g.remove_widget=function(b,c){var d=b instanceof jQuery?b:a(b),e=d.coords().grid;this.$widgets=this.$widgets.not(d);var f=this.widgets_below(d);this.remove_from_gridmap(e),d.fadeOut(a.proxy(function(){d.remove(),f.each(a.proxy(function(b,c){this.move_widget_up(a(c),e.size_y)},this)),c&&c.apply(this,b)},this))},g.serialize=function(b){b||(b=this.$widgets);var c=[];return b.each(a.proxy(function(b,d){c.push(this.options.serialize_params(a(d),a(d).coords().grid))},this)),c},g.serialize_changed=function(){return this.serialize(this.$changed)},g.register_widget=function(a){var b={col:parseInt(a.attr("data-col"),10),row:parseInt(a.attr("data-row"),10),size_x:parseInt(a.attr("data-sizex"),10),size_y:parseInt(a.attr("data-sizey"),10),el:a};return this.options.avoid_overlapped_widgets&&!this.can_move_to({size_x:b.size_x,size_y:b.size_y},b.col,b.row)&&(b=this.next_position(b.size_x,b.size_y),b.el=a,a.attr({"data-col":b.col,"data-row":b.row,"data-sizex":b.size_x,"data-sizey":b.size_y})),a.data("coords",a.coords()),a.data("coords").grid=b,this.add_to_gridmap(b,a),this.widgets.push(a),this},g.update_widget_position=function(a,b){return this.for_each_cell_occupied(a,function(a,c){if(!this.gridmap[a])return this;this.gridmap[a][c]=b}),this},g.remove_from_gridmap=function(a){return this.update_widget_position(a,!1)},g.add_to_gridmap=function(b,c){this.update_widget_position(b,c||b.el);if(b.el){var d=this.widgets_below(b.el);d.each(a.proxy(function(b,c){this.move_widget_up(a(c))},this))}},g.draggable=function(){var b=this,c=a.extend(!0,{},this.options.draggable,{offset_left:this.options.widget_margins[0],items:".gs_w",start:function(c,d){b.$widgets.filter(".player-revert").removeClass("player-revert"),b.$player=a(this),b.$helper=b.options.draggable.helper==="clone"?a(d.helper):b.$player,b.helper=!b.$helper.is(b.$player),b.on_start_drag.call(b,c,d),b.$el.trigger("gridster:dragstart")},stop:function(a,c){b.on_stop_drag.call(b,a,c),b.$el.trigger("gridster:dragstop")},drag:function(a,c){b.on_drag.call(b,a,c),b.$el.trigger("gridster:drag")}});return this.drag_api=this.$el.draggable(c).data("draggable"),this},g.on_start_drag=function(b,c){this.$helper.add(this.$player).add(this.$wrapper).addClass("dragging"),this.$player.addClass("player"),this.player_grid_data=this.$player.coords().grid,this.placeholder_grid_data=a.extend({},this.player_grid_data),this.$el.css("height",this.$el.height()+this.player_grid_data.size_y*this.min_widget_height);var d=this.faux_grid,e=this.$player.data("coords").coords;this.cells_occupied_by_player=this.get_cells_occupied(this.player_grid_data),this.cells_occupied_by_placeholder=this.get_cells_occupied(this.placeholder_grid_data),this.last_cols=[],this.last_rows=[],this.collision_api=this.$helper.collision(d,this.options.collision),this.$preview_holder=a("<li />",{"class":"preview-holder","data-row":this.$player.attr("data-row"),"data-col":this.$player.attr("data-col"),css:{width:e.width,height:e.height}}).appendTo(this.$el),this.options.draggable.start&&this.options.draggable.start.call(this,b,c)},g.on_drag=function(a,b){var c={left:b.position.left+this.baseX,top:b.position.top+this.baseY};this.colliders_data=this.collision_api.get_closest_colliders(c),this.on_overlapped_column_change(this.on_start_overlapping_column,this.on_stop_overlapping_column),this.on_overlapped_row_change(this.on_start_overlapping_row,this.on_stop_overlapping_row),this.helper&&this.$player&&this.$player.css({left:b.position.left,top:b.position.top}),this.options.draggable.drag&&this.options.draggable.drag.call(this,a,b)},g.on_stop_drag=function(a,b){this.$helper.add(this.$player).add(this.$wrapper).removeClass("dragging"),b.position.left=b.position.left+this.baseX,b.position.top=b.position.top+this.baseY,this.colliders_data=this.collision_api.get_closest_colliders(b.position),this.on_overlapped_column_change(this.on_start_overlapping_column,this.on_stop_overlapping_column),this.on_overlapped_row_change(this.on_start_overlapping_row,this.on_stop_overlapping_row),this.$player.addClass("player-revert").removeClass("player").attr({"data-col":this.placeholder_grid_data.col,"data-row":this.placeholder_grid_data.row}).css({left:"",top:""}),this.$changed=this.$changed.add(this.$player),this.cells_occupied_by_player=this.get_cells_occupied(this.placeholder_grid_data),this.set_cells_player_occupies(this.placeholder_grid_data.col,this.placeholder_grid_data.row),this.$player.coords().grid.row=this.placeholder_grid_data.row,this.$player.coords().grid.col=this.placeholder_grid_data.col,this.$player=null,this.$preview_holder.remove(),this.set_dom_grid_height(),this.options.draggable.stop&&this.options.draggable.stop.call(this,a,b)},g.on_overlapped_column_change=function(b,c){if(!this.colliders_data.length)return;var d=this.get_targeted_columns(this.colliders_data[0].el.data.col),e=this.last_cols.length,f=d.length,g;for(g=0;g<f;g++)a.inArray(d[g],this.last_cols)===-1&&(b||a.noop).call(this,d[g]);for(g=0;g<e;g++)a.inArray(this.last_cols[g],d)===-1&&(c||a.noop).call(this,this.last_cols[g]);return this.last_cols=d,this},g.on_overlapped_row_change=function(b,c){if(!this.colliders_data.length)return;var d=this.get_targeted_rows(this.colliders_data[0].el.data.row),e=this.last_rows.length,f=d.length,g;for(g=0;g<f;g++)a.inArray(d[g],this.last_rows)===-1&&(b||a.noop).call(this,d[g]);for(g=0;g<e;g++)a.inArray(this.last_rows[g],d)===-1&&(c||a.noop).call(this,this.last_rows[g]);this.last_rows=d},g.set_player=function(a,b){this.empty_cells_player_occupies();var c=this,d=c.colliders_data[0].el.data,e=d.col,f=b||d.row;this.player_grid_data={col:e,row:f,size_y:this.player_grid_data.size_y,size_x:this.player_grid_data.size_x},this.cells_occupied_by_player=this.get_cells_occupied(this.player_grid_data);var g=this.get_widgets_overlapped(this.player_grid_data),h=this.widgets_constraints(g);this.manage_movements(h.can_go_up,e,f),this.manage_movements(h.can_not_go_up,e,f);if(!g.length){var i=this.can_go_player_up(this.player_grid_data);i!==!1&&(f=i),this.set_placeholder(e,f)}return{col:e,row:f}},g.widgets_constraints=function(b){var c=a([]),d,e=[],f=[];return b.each(a.proxy(function(b,d){var g=a(d),h=g.coords().grid;this.can_go_widget_up(h)?(c=c.add(g),e.push(h)):f.push(h)},this)),d=b.not(c),{can_go_up:this.sort_by_row_asc(e),can_not_go_up:this.sort_by_row_desc(f)}},g.sort_by_row_asc=function(a){return a=a.sort(function(a,b){return a.row>b.row?1:-1}),a},g.sort_by_row_and_col_asc=function(a){return a=a.sort(function(a,b){return a.row>b.row||a.row==b.row&&a.col>b.col?1:-1}),a},g.sort_by_col_asc=function(a){return a=a.sort(function(a,b){return a.col>b.col?1:-1}),a},g.sort_by_row_desc=function(a){return a=a.sort(function(a,b){return a.row+a.size_y<b.row+b.size_y?1:-1}),a},g.manage_movements=function(b,c,d){return a.each(b,a.proxy(function(a,b){var e=b,f=e.el,g=this.can_go_widget_up(e);if(g)this.move_widget_to(f,g),this.set_placeholder(c,g+e.size_y);else{var h=this.can_go_player_up(this.player_grid_data);if(!h){var i=d+this.player_grid_data.size_y-e.row;this.move_widget_down(f,i),this.set_placeholder(c,d)}}},this)),this},g.is_player=function(a,b){if(b&&!this.gridmap[a])return!1;var c=b?this.gridmap[a][b]:a;return c&&(c.is(this.$player)||c.is(this.$helper))},g.is_player_in=function(b,c){var d=this.cells_occupied_by_player;return a.inArray(b,d.cols)>=0&&a.inArray(c,d.rows)>=0},g.is_placeholder_in=function(b,c){var d=this.cells_occupied_by_placeholder||[];return this.is_placeholder_in_col(b)&&a.inArray(c,d.rows)>=0},g.is_placeholder_in_col=function(b){var c=this.cells_occupied_by_placeholder||[];return a.inArray(b,c.cols)>=0},g.is_empty=function(a,b){return typeof this.gridmap[a]!="undefined"&&typeof this.gridmap[a][b]!="undefined"&&this.gridmap[a][b]===!1?!0:!1},g.is_occupied=function(a,b){return this.gridmap[a]?this.gridmap[a][b]?!0:!1:!1},g.is_widget=function(a,b){var c=this.gridmap[a];return c?(c=c[b],c?c:!1):!1},g.is_widget_under_player=function(a,b){return this.is_widget(a,b)?this.is_player_in(a,b):!1},g.get_widgets_under_player=function(){var b=this.cells_occupied_by_player,c=a([]);return a.each(b.cols,a.proxy(function(d,e){a.each(b.rows,a.proxy(function(a,b){this.is_widget(e,b)&&(c=c.add(this.gridmap[e][b]))},this))},this)),c},g.set_placeholder=function(b,c){var d=a.extend({},this.placeholder_grid_data),e=this.widgets_below({col:d.col,row:d.row,size_y:d.size_y,size_x:d.size_x}),f=b+d.size_x-1;f>this.cols&&(b=b-(f-b));var g=this.placeholder_grid_data.row<c,h=this.placeholder_grid_data.col!==b;this.placeholder_grid_data.col=b,this.placeholder_grid_data.row=c,this.cells_occupied_by_placeholder=this.get_cells_occupied(this.placeholder_grid_data),this.$preview_holder.attr({"data-row":c,"data-col":b}),(g||h)&&e.each(a.proxy(function(c,e){this.move_widget_up(a(e),this.placeholder_grid_data.col-b+d.size_y)},this))},g.can_go_player_up=function(a){var b=a.row+a.size_y-1,c=!0,d=[],e=1e4,f=this.get_widgets_under_player();return this.for_each_column_occupied(a,function(a){var g=this.gridmap[a],h=b+1;d[a]=[];while(--h>0)if(this.is_empty(a,h)||this.is_player(a,h)||this.is_widget(a,h)&&g[h].is(f))d[a].push(h),e=h<e?h:e;else break;if(d[a].length===0)return c=!1,!0;d[a].sort()}),c?this.get_valid_rows(a,d,e):!1},g.can_go_widget_up=function(a){var b=a.row+a.size_y-1,c=!0,d=[],e=1e4;return this.for_each_column_occupied(a,function(a){var f=this.gridmap[a];d[a]=[];var g=b+1;while(--g>0){if(this.is_occupied(a,g)&&!this.is_player(a,g))break;!this.is_player(a,g)&&!this.is_placeholder_in(a,g)&&d[a].push(g),g<e&&(e=g)}if(d[a].length===0)return c=!1,!0;d[a].sort()}),c?this.get_valid_rows(a,d,e):!1},g.get_valid_rows=function(b,c,d){var e=b.row,f=b.row+b.size_y-1,g=b.size_y,h=d-1,i=[];while(++h<=f){var j=!0;a.each(c,function(b,c){c&&a.inArray(h,c)===-1&&(j=!1)});if(j===!0){i.push(h);if(i.length===g)break}}var k=!1;return g===1?i[0]!==e&&(k=i[0]||!1):i[0]!==e&&(k=this.get_consecutive_numbers_index(i,g)),k},g.get_consecutive_numbers_index=function(a,b){var c=a.length,d=[],e=!0,f=-1;for(var g=0;g<c;g++){if(e||a[g]===f+1){d.push(g);if(d.length===b)break;e=!1}else d=[],e=!0;f=a[g]}return d.length>=b?a[d[0]]:!1},g.get_widgets_overlapped=function(){var b,c=a([]),d=[],e=this.cells_occupied_by_player.rows.slice(0);return e.reverse(),a.each(this.cells_occupied_by_player.cols,a.proxy(function(b,f){a.each(e,a.proxy(function(b,e){if(!this.gridmap[f])return!0;var g=this.gridmap[f][e];this.is_occupied(f,e)&&!this.is_player(g)&&a.inArray(g,d)===-1&&(c=c.add(g),d.push(g))},this))},this)),c},g.on_start_overlapping_column=function(a){this.set_player(a,!1)},g.on_start_overlapping_row=function(a){this.set_player(!1,a)},g.on_stop_overlapping_column=function(a){this.set_player();var b=this;this.for_each_widget_below(a,this.cells_occupied_by_player.rows[0],function(a,c){b.move_widget_up(this,b.player_grid_data.size_y)})},g.on_stop_overlapping_row=function(a){this.set_player();var b=this,c=this.cells_occupied_by_player.cols;for(var d=0,e=c.length;d<e;d++)this.for_each_widget_below(c[d],a,function(a,c){b.move_widget_up(this,b.player_grid_data.size_y)})},g.move_widget_to=function(b,c){var d=this,e=b.coords().grid,f=c-e.row,g=this.widgets_below(b),h=this.can_move_to(e,e.col,c,b);return h===!1?!1:(this.remove_from_gridmap(e),e.row=c,this.add_to_gridmap(e),b.attr("data-row",c),this.$changed=this.$changed.add(b),g.each(function(b,c){var e=a(c),f=e.coords().grid,g=d.can_go_widget_up(f);g&&g!==f.row&&d.move_widget_to(e,g)}),this)},g.move_widget_up=function(b,c){var d=b.coords().grid,e=d.row,f=[],g=!0;c||(c=1);if(!this.can_go_up(b))return!1;this.for_each_column_occupied(d,function(d){if(a.inArray(b,f)===-1){var g=b.coords().grid,h=e-c;h=this.can_go_up_to_row(g,d,h);if(!h)return!0;var i=this.widgets_below(b);this.remove_from_gridmap(g),g.row=h,this.add_to_gridmap(g),b.attr("data-row",g.row),this.$changed=this.$changed.add(b),f.push(b),i.each(a.proxy(function(b,d){this.move_widget_up(a(d),c)},this))}})},g.move_widget_down=function(b,c){var d=b.coords().grid,e=d.row,f=[],g=c;if(!b)return!1;if(a.inArray(b,f)===-1){var h=b.coords().grid,i=e+c,j=this.widgets_below(b);this.remove_from_gridmap(h),j.each(a.proxy(function(b,c){var d=a(c),e=d.coords().grid,f=this.displacement_diff(e,h,g);f>0&&this.move_widget_down(d,f)},this)),h.row=i,this.update_widget_position(h,b),b.attr("data-row",h.row),this.$changed=this.$changed.add(b),f.push(b)}},g.can_go_up_to_row=function(b,c,d){var e=this.gridmap,f=!0,g=[],h=b.row,i;this.for_each_column_occupied(b,function(a){var b=e[a];g[a]=[],i=h;while(i--)if(this.is_empty(a,i)&&!this.is_placeholder_in(a,i))g[a].push(i);else break;if(!g[a].length)return f=!1,!0});if(!f)return!1;i=d;for(i=1;i<h;i++){var j=!0;for(var k=0,l=g.length;k<l;k++)g[k]&&a.inArray(i,g[k])===-1&&(j=!1);if(j===!0){f=i;break}}return f},g.displacement_diff=function(a,b,c){var d=a.row,e=[],f=b.row+b.size_y;this.for_each_column_occupied(a,function(a){var b=0;for(var c=f;c<d;c++)this.is_empty(a,c)&&(b=b+1);e.push(b)});var g=Math.max.apply(null,e);return c=c-g,c>0?c:0},g.widgets_below=function(b){var c=a.isPlainObject(b)?b:b.coords().grid,d=this,e=this.gridmap,f=c.row+c.size_y-1,g=a([]);return this.for_each_column_occupied(c,function(b){d.for_each_widget_below(b,f,function(b,c){if(!d.is_player(this)&&a.inArray(this,g)===-1)return g=g.add(this),!0})}),this.sort_by_row_asc(g)},g.set_cells_player_occupies=function(a,b){return this.remove_from_gridmap(this.placeholder_grid_data),this.placeholder_grid_data.col=a,this.placeholder_grid_data.row=b,this.add_to_gridmap(this.placeholder_grid_data,this.$player),this},g.empty_cells_player_occupies=function(){return this.remove_from_gridmap(this.placeholder_grid_data),this},g.can_go_up=function(a){var b=a.coords().grid,c=b.row,d=c-1,e=this.gridmap,f=[],g=!0;return c===1?!1:(this.for_each_column_occupied(b,function(a){if(this.is_occupied(a,d)||this.is_player(a,d)||this.is_placeholder_in(a,d))return g=!1,!0}),g)},g.can_move_to=function(a,b,c){var d=this.gridmap,e=a.el,f={size_y:a.size_y,size_x:a.size_x,col:b,row:c},g=!0,h=b+a.size_x-1;return h>this.cols?!1:(this.for_each_cell_occupied(f,function(b,c){var d=this.is_widget(b,c);d&&(!a.el||d.is(e))&&(g=!1)}),g)},g.get_targeted_columns=function(a){var b=(a||this.player_grid_data.col)+(this.player_grid_data.size_x-1),c=[];for(var d=a;d<=b;d++)c.push(d);return c},g.get_targeted_rows=function(a){var b=(a||this.player_grid_data.row)+(this.player_grid_data.size_y-1),c=[];for(var d=a;d<=b;d++)c.push(d);return c},g.get_cells_occupied=function(a){var b={cols:[],rows:[]},c;arguments[1]instanceof jQuery&&(a=arguments[1].coords().grid);for(c=0;c<a.size_x;c++){var d=a.col+c;b.cols.push(d)}for(c=0;c<a.size_y;c++){var e=a.row+c;b.rows.push(e)}return b},g.for_each_cell_occupied=function(a,b){return this.for_each_column_occupied(a,function(c){this.for_each_row_occupied(a,function(a){b.call(this,c,a)})}),this},g.for_each_column_occupied=function(a,b){for(var c=0;c<a.size_x;c++){var d=a.col+c;b.call(this,d,a)}},g.for_each_row_occupied=function(a,b){for(var c=0;c<a.size_y;c++){var d=a.row+c;b.call(this,d,a)}},g._traversing_widgets=function(b,c,d,e,f){var g=this.gridmap;if(!g[d])return;var h,i,j=b+"/"+c;if(arguments[2]instanceof jQuery){var k=arguments[2].coords().grid;d=k.col,e=k.row,f=arguments[3]}var l=[],m=e,n={"for_each/above":function(){while(m--)if(m>0&&this.is_widget(d,m)&&a.inArray(g[d][m],l)===-1){h=f.call(g[d][m],d,m),l.push(g[d][m]);if(h)break}},"for_each/below":function(){for(m=e+1,i=g[d].length;m<i;m++)if(this.is_widget(d,m)&&a.inArray(g[d][m],l)===-1){h=f.call(g[d][m],d,m),l.push(g[d][m]);if(h)break}}};n[j]&&n[j].call(this)},g.for_each_widget_above=function(a,b,c){return this._traversing_widgets("for_each","above",a,b,c),this},g.for_each_widget_below=function(a,b,c){return this._traversing_widgets("for_each","below",a,b,c),this},g.get_highest_occupied_cell=function(){var a,b=this.gridmap,c=[],d=[];for(var e=b.length-1;e>=1;e--)for(a=b[e].length-1;a>=1;a--)if(this.is_widget(e,a)){c.push(a),d[a]=e;break}var f=Math.max.apply(null,c);return this.highest_occupied_cell={col:d[f],row:f},this.highest_occupied_cell},g.get_widgets_from=function(b,c){var d=this.gridmap,e=a();return b&&(e=e.add(this.$widgets.filter(function(){var c=a(this).attr("data-col");return c==b||c>b}))),c&&(e=e.add(this.$widgets.filter(function(){var b=a(this).attr("data-row");return b==c||b>c}))),e},g.set_dom_grid_height=function(){var a=this.get_highest_occupied_cell().row;return this.$el.css("height",a*this.min_widget_height),this},g.generate_stylesheet=function(b){var c="",d=10,e=6,g=6,h,i;b||(b={}),b.cols||(b.cols=this.cols),b.rows||(b.rows=this.rows),b.namespace||(b.namespace=""),b.widget_base_dimensions||(b.widget_base_dimensions=this.options.widget_base_dimensions),b.widget_margins||(b.widget_margins=this.options.widget_margins),b.min_widget_width=b.widget_margins[0]*2+b.widget_base_dimensions[0],b.min_widget_height=b.widget_margins[1]*2+b.widget_base_dimensions[1];var j=a.param(b);if(a.inArray(j,f.generated_stylesheets)>=0)return!1;f.generated_stylesheets.push(j);for(h=b.cols+d;h>=0;h--)c+=b.namespace+' [data-col="'+(h+1)+'"] { left: '+(h*b.widget_base_dimensions[0]+h*b.widget_margins[0]+(h+1)*b.widget_margins[0])+"px;} ";for(h=b.rows+d;h>=0;h--)c+=b.namespace+' [data-row="'+(h+1)+'"] { top: '+(h*b.widget_base_dimensions[1]+h*b.widget_margins[1]+(h+1)*b.widget_margins[1])+"px;} ";for(var k=1;k<e;k++)c+=b.namespace+' [data-sizey="'+k+'"] { height: '+(k*b.widget_base_dimensions[1]+(k-1)*b.widget_margins[1]*2)+"px;}";for(var l=1;l<g;l++)c+=b.namespace+' [data-sizex="'+l+'"] { width: '+(l*b.widget_base_dimensions[0]+(l-1)*b.widget_margins[0]*2)+"px;}";return this.add_style_tag(c)},g.add_style_tag=function(a){var b=c,d=b.createElement("style");return b.getElementsByTagName("head")[0].appendChild(d),d.setAttribute("type","text/css"),d.styleSheet?d.styleSheet.cssText=a:d.appendChild(c.createTextNode(a)),this},g.generate_faux_grid=function(b,c){this.faux_grid=[],this.gridmap=[];var d,e;for(d=c;d>0;d--){this.gridmap[d]=[];for(e=b;e>0;e--){var f=a({left:this.baseX+(d-1)*this.min_widget_width,top:this.baseY+(e-1)*this.min_widget_height,width:this.min_widget_width,height:this.min_widget_height,col:d,row:e,original_col:d,original_row:e}).coords();this.gridmap[d][e]=!1,this.faux_grid.push(f)}}return this},g.recalculate_faux_grid=function(){var c=this.$wrapper.width();return this.baseX=(a(b).width()-c)/2,this.baseY=this.$wrapper.offset().top,a.each(this.faux_grid,a.proxy(function(a,b){this.faux_grid[a]=b.update({left:this.baseX+(b.data.col-1)*this.min_widget_width,top:this.baseY+(b.data.row-1)*this.min_widget_height})},this)),this},g.get_widgets_from_DOM=function(){return this.$widgets.each(a.proxy(function(b,c){this.register_widget(a(c))},this)),this},g.generate_grid_and_stylesheet=function(){var c=this.$wrapper.width(),d=this.$wrapper.height(),e=Math.floor(c/this.min_widget_width)+this.options.extra_cols,f=Math.floor(d/this.min_widget_height)+this.options.extra_rows,g=this.$widgets.map(function(){return a(this).attr("data-col")}),h=this.$widgets.map(function(){return a(this).attr("data-row")}),i=Math.max.apply(null,g),j=Math.max.apply(null,h);return this.cols=Math.max(i,e,this.options.min_cols),this.rows=Math.max(j,f,this.options.min_rows),this.baseX=(a(b).width()-c)/2,this.baseY=this.$wrapper.offset().top,this.options.autogenerate_stylesheet&&this.generate_stylesheet(),this.generate_faux_grid(this.rows,this.cols)},a.fn.gridster=function(b){return this.each(function(){a(this).data("gridster")||a(this).data("gridster",new f(this,b))})}}(jQuery,window,document);
\ No newline at end of file
diff --git a/docs/api.js b/docs/api.js
index 80392888e1..8b7efa7acb 100644
--- a/docs/api.js
+++ b/docs/api.js
@@ -3,6 +3,7 @@ YUI.add("yuidoc-meta", function(Y) {
     "classes": [
         "Collision",
         "Coords",
+        "Draggable",
         "Gridster"
     ],
     "modules": [],
diff --git a/docs/classes/Collision.html b/docs/classes/Collision.html
index 4acf1b1e43..74c25d5b5d 100644
--- a/docs/classes/Collision.html
+++ b/docs/classes/Collision.html
@@ -46,6 +46,8 @@
             
                 <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
diff --git a/docs/classes/Coords.html b/docs/classes/Coords.html
index e315cfc5ff..603259dcf0 100644
--- a/docs/classes/Coords.html
+++ b/docs/classes/Coords.html
@@ -46,6 +46,8 @@
             
                 <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
@@ -107,7 +109,7 @@
 
 
 <div class="box intro">
-    <p>Coords description</p>
+    <p>Coords</p>
 </div>
 
 
diff --git a/docs/classes/Draggable.html b/docs/classes/Draggable.html
new file mode 100644
index 0000000000..62f883a3ad
--- /dev/null
+++ b/docs/classes/Draggable.html
@@ -0,0 +1,222 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Draggable</title>
+    <link rel="stylesheet" href="http:&#x2F;&#x2F;yui.yahooapis.com&#x2F;3.5.1&#x2F;build&#x2F;cssgrids&#x2F;cssgrids-min.css">
+    <link rel="stylesheet" href="..&#x2F;assets/vendor/prettify/prettify-min.css">
+    <link rel="stylesheet" href="..&#x2F;assets/css/main.css" id="site_styles">
+    <link rel="shortcut icon" type="image/png" href="..&#x2F;assets/favicon.png">
+    <script src="http:&#x2F;&#x2F;yui.yahooapis.com&#x2F;combo?3.5.1&#x2F;build&#x2F;yui&#x2F;yui-min.js"></script>
+</head>
+<body class="yui3-skin-sam">
+
+<div id="doc">
+    <div id="hd" class="yui3-g header">
+        <div class="yui3-u-3-4">
+            
+                <!-- <h1><img src="..&#x2F;assets/css/logo.png" title=""></h1> -->
+                <h1><img src="http://ducksboard.com/wp-content/themes/blog-theme-ducksboard/images/ducksboard.png" title=""></h1>
+            
+        </div>
+        <div class="yui3-u-1-4 version">
+            <em>API Docs for: </em>
+        </div>
+    </div>
+    <div id="bd" class="yui3-g">
+
+        <div class="yui3-u-1-4">
+            <div id="docs-sidebar" class="sidebar apidocs">
+                <div id="api-list">
+    <h2 class="off-left">APIs</h2>
+    <div id="api-tabview" class="tabview">
+        <ul class="tabs">
+            <li><a href="#api-classes">Classes</a></li>
+            <li><a href="#api-modules">Modules</a></li>
+        </ul>
+
+        <div id="api-tabview-filter">
+            <input type="search" id="api-filter" placeholder="Type to filter APIs">
+        </div>
+
+        <div id="api-tabview-panel">
+            <ul id="api-classes" class="apis classes">
+            
+                <li><a href="..&#x2F;classes/Collision.html">Collision</a></li>
+            
+                <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
+            
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
+                <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
+            
+            </ul>
+
+            <ul id="api-modules" class="apis modules">
+            
+            </ul>
+        </div>
+    </div>
+</div>
+
+            </div>
+        </div>
+        <div class="yui3-u-3-4">
+                <div id="api-options">
+        Show:
+        <label for="api-show-inherited">
+            <input type="checkbox" id="api-show-inherited" checked>
+            Inherited
+        </label>
+
+        <label for="api-show-protected">
+            <input type="checkbox" id="api-show-protected">
+            Protected
+        </label>
+
+        <label for="api-show-private">
+            <input type="checkbox" id="api-show-private">
+            Private
+        </label>
+        <label for="api-show-deprecated">
+            <input type="checkbox" id="api-show-deprecated">
+            Deprecated
+        </label>
+
+    </div>
+
+
+            <div class="apidocs">
+                <div id="docs-main">
+                    <div class="content">
+                        <h1>Draggable Class</h1>
+<div class="box meta">
+    
+
+    
+
+    
+        <div class="foundat">
+            Defined in: <a href="..&#x2F;files&#x2F;src_jquery.draggable.js.html#l24"><code>src&#x2F;jquery.draggable.js:24</code></a>
+        </div>
+    
+
+    
+
+    
+</div>
+
+
+
+<div class="box intro">
+    <p>Draggable</p>
+</div>
+
+
+    <div class="constructor">
+        <h2>Constructor</h2>
+        <div id="method_Draggable" class="method item">
+    <h3 class="name"><code>Draggable</code></h3>
+
+    
+        <span class="paren">()</span>
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    <div class="meta">
+        
+            
+                
+                <p>
+                
+                Defined in
+                
+            
+        
+        
+        <a href="..&#x2F;files&#x2F;src_jquery.draggable.js.html#l24"><code>src&#x2F;jquery.draggable.js:24</code></a>
+        
+        </p>
+
+
+        
+
+        
+    </div>
+
+    <div class="description">
+        
+    </div>
+
+    
+
+    
+
+    
+</div>
+
+    </div>
+
+
+<div id="classdocs" class="tabview">
+    <ul class="api-class-tabs">
+        <li class="api-class-tab index"><a href="#index">Index</a></li>
+
+        
+        
+        
+        
+    </ul>
+
+    <div>
+        <div id="index" class="api-class-tabpanel index">
+            <h2 class="off-left">Item Index</h2>
+
+            
+
+            
+
+            
+
+            
+        </div>
+
+        
+
+        
+
+        
+
+        
+    </div>
+</div>
+
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+<script src="..&#x2F;assets/vendor/prettify/prettify-min.js"></script>
+<script>prettyPrint();</script>
+<script src="..&#x2F;assets/js/yui-prettify.js"></script>
+<script src="..&#x2F;assets/../api.js"></script>
+<script src="..&#x2F;assets/js/api-filter.js"></script>
+<script src="..&#x2F;assets/js/api-list.js"></script>
+<script src="..&#x2F;assets/js/api-search.js"></script>
+<script src="..&#x2F;assets/js/apidocs.js"></script>
+</body>
+</html>
diff --git a/docs/classes/Gridster.html b/docs/classes/Gridster.html
index fe4b5d5983..c052ce9429 100644
--- a/docs/classes/Gridster.html
+++ b/docs/classes/Gridster.html
@@ -46,6 +46,8 @@
             
                 <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
@@ -106,7 +108,7 @@
 
     
         <div class="foundat">
-            Defined in: <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l70"><code>src&#x2F;jquery.gridster.js:70</code></a>
+            Defined in: <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l33"><code>src&#x2F;jquery.gridster.js:33</code></a>
         </div>
     
 
@@ -172,7 +174,7 @@
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l70"><code>src&#x2F;jquery.gridster.js:70</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l33"><code>src&#x2F;jquery.gridster.js:33</code></a>
         
         </p>
 
@@ -497,6 +499,20 @@
 
                                 
                                 
+                            </li>
+                        
+                            <li class="index-item method">
+                                <a href="#method_enable">enable</a>
+
+                                
+                                
+                            </li>
+                        
+                            <li class="index-item method">
+                                <a href="#method_enable">enable</a>
+
+                                
+                                
                             </li>
                         
                             <li class="index-item method">
@@ -847,6 +863,13 @@
 
                                 
                                 
+                            </li>
+                        
+                            <li class="index-item method">
+                                <a href="#method_sort_by_row_asc">sort_by_row_asc</a>
+
+                                
+                                
                             </li>
                         
                             <li class="index-item method">
@@ -939,7 +962,7 @@
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1899"><code>src&#x2F;jquery.gridster.js:1899</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l2004"><code>src&#x2F;jquery.gridster.js:2004</code></a>
         
         </p>
 
@@ -1049,7 +1072,7 @@
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l339"><code>src&#x2F;jquery.gridster.js:339</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l342"><code>src&#x2F;jquery.gridster.js:342</code></a>
         
         </p>
 
@@ -1182,7 +1205,7 @@
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l140"><code>src&#x2F;jquery.gridster.js:140</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l129"><code>src&#x2F;jquery.gridster.js:129</code></a>
         
         </p>
 
@@ -1260,7 +1283,7 @@
                     
                         <span class="type">HTMLElement</span>:
                     
-                    Returns the jQuery wrapped HTMLElement representing
+                    Returns the jQuery wrapped HTMLElement representing.
  the widget that was just created.
                 
             </div>
@@ -1317,7 +1340,7 @@
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l995"><code>src&#x2F;jquery.gridster.js:995</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1048"><code>src&#x2F;jquery.gridster.js:1048</code></a>
         
         </p>
 
@@ -1435,7 +1458,7 @@
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1402"><code>src&#x2F;jquery.gridster.js:1402</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1455"><code>src&#x2F;jquery.gridster.js:1455</code></a>
         
         </p>
 
@@ -1572,7 +1595,7 @@ upper row possible.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1044"><code>src&#x2F;jquery.gridster.js:1044</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1097"><code>src&#x2F;jquery.gridster.js:1097</code></a>
         
         </p>
 
@@ -1690,7 +1713,7 @@ upper row possible.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1574"><code>src&#x2F;jquery.gridster.js:1574</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1627"><code>src&#x2F;jquery.gridster.js:1627</code></a>
         
         </p>
 
@@ -1817,7 +1840,7 @@ into account the dimensions (<code>size_y</code> and <code>size_x</code> attrs.
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l361"><code>src&#x2F;jquery.gridster.js:361</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l364"><code>src&#x2F;jquery.gridster.js:364</code></a>
         
         </p>
 
@@ -1888,7 +1911,7 @@ into account the dimensions (<code>size_y</code> and <code>size_x</code> attrs.
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1537"><code>src&#x2F;jquery.gridster.js:1537</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1590"><code>src&#x2F;jquery.gridster.js:1590</code></a>
         
         </p>
 
@@ -1905,6 +1928,148 @@ into account the dimensions (<code>size_y</code> and <code>size_x</code> attrs.
     
 
     
+        <div class="returns">
+            <h4>Returns:</h4>
+
+            <div class="returns-description">
+                
+                    
+                        <span class="type">Class</span>:
+                    
+                    Returns the instance of the Gridster Class.
+                
+            </div>
+        </div>
+    
+
+    
+</div>
+
+                
+                    <div id="method_enable" class="method item">
+    <h3 class="name"><code>enable</code></h3>
+
+    
+        <span class="paren">()</span>
+    
+
+    
+        <span class="returns-inline">
+            <span class="type">Class</span>
+        </span>
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    <div class="meta">
+        
+            
+                
+                <p>
+                
+                Defined in
+                
+            
+        
+        
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l105"><code>src&#x2F;jquery.gridster.js:105</code></a>
+        
+        </p>
+
+
+        
+
+        
+    </div>
+
+    <div class="description">
+        <p>Disable dragging.</p>
+    </div>
+
+    
+
+    
+        <div class="returns">
+            <h4>Returns:</h4>
+
+            <div class="returns-description">
+                
+                    
+                        <span class="type">Class</span>:
+                    
+                    Returns the instance of the Gridster Class.
+                
+            </div>
+        </div>
+    
+
+    
+</div>
+
+                
+                    <div id="method_enable" class="method item">
+    <h3 class="name"><code>enable</code></h3>
+
+    
+        <span class="paren">()</span>
+    
+
+    
+        <span class="returns-inline">
+            <span class="type">Class</span>
+        </span>
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    <div class="meta">
+        
+            
+                
+                <p>
+                
+                Defined in
+                
+            
+        
+        
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l117"><code>src&#x2F;jquery.gridster.js:117</code></a>
+        
+        </p>
+
+
+        
+
+        
+    </div>
+
+    <div class="description">
+        <p>Enable dragging.</p>
+    </div>
+
+    
+
+    
         <div class="returns">
             <h4>Returns:</h4>
 
@@ -1975,7 +2140,7 @@ into account the dimensions (<code>size_y</code> and <code>size_x</code> attrs.
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1671"><code>src&#x2F;jquery.gridster.js:1671</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1730"><code>src&#x2F;jquery.gridster.js:1730</code></a>
         
         </p>
 
@@ -2103,7 +2268,7 @@ each one.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1692"><code>src&#x2F;jquery.gridster.js:1692</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1751"><code>src&#x2F;jquery.gridster.js:1751</code></a>
         
         </p>
 
@@ -2231,7 +2396,7 @@ each one.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1711"><code>src&#x2F;jquery.gridster.js:1711</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1770"><code>src&#x2F;jquery.gridster.js:1770</code></a>
         
         </p>
 
@@ -2364,7 +2529,7 @@ each one.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1777"><code>src&#x2F;jquery.gridster.js:1777</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1836"><code>src&#x2F;jquery.gridster.js:1836</code></a>
         
         </p>
 
@@ -2511,7 +2676,7 @@ iteration. The value of <code>this</code> inside the function is the jQuery wrap
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1793"><code>src&#x2F;jquery.gridster.js:1793</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1852"><code>src&#x2F;jquery.gridster.js:1852</code></a>
         
         </p>
 
@@ -2652,7 +2817,7 @@ iteration. The value of <code>this</code> inside the function is the jQuery wrap
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1922"><code>src&#x2F;jquery.gridster.js:1922</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l2027"><code>src&#x2F;jquery.gridster.js:2027</code></a>
         
         </p>
 
@@ -2762,7 +2927,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1996"><code>src&#x2F;jquery.gridster.js:1996</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l2101"><code>src&#x2F;jquery.gridster.js:2101</code></a>
         
         </p>
 
@@ -2850,7 +3015,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1855"><code>src&#x2F;jquery.gridster.js:1855</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1941"><code>src&#x2F;jquery.gridster.js:1941</code></a>
         
         </p>
 
@@ -2969,7 +3134,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1643"><code>src&#x2F;jquery.gridster.js:1643</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1702"><code>src&#x2F;jquery.gridster.js:1702</code></a>
         
         </p>
 
@@ -3063,7 +3228,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1809"><code>src&#x2F;jquery.gridster.js:1809</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1868"><code>src&#x2F;jquery.gridster.js:1868</code></a>
         
         </p>
 
@@ -3144,7 +3309,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1608"><code>src&#x2F;jquery.gridster.js:1608</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1667"><code>src&#x2F;jquery.gridster.js:1667</code></a>
         
         </p>
 
@@ -3249,7 +3414,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1626"><code>src&#x2F;jquery.gridster.js:1626</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1685"><code>src&#x2F;jquery.gridster.js:1685</code></a>
         
         </p>
 
@@ -3366,7 +3531,7 @@ detect row or column that we want to go.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1095"><code>src&#x2F;jquery.gridster.js:1095</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1148"><code>src&#x2F;jquery.gridster.js:1148</code></a>
         
         </p>
 
@@ -3494,7 +3659,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1982"><code>src&#x2F;jquery.gridster.js:1982</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l2087"><code>src&#x2F;jquery.gridster.js:2087</code></a>
         
         </p>
 
@@ -3565,7 +3730,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1173"><code>src&#x2F;jquery.gridster.js:1173</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1226"><code>src&#x2F;jquery.gridster.js:1226</code></a>
         
         </p>
 
@@ -3636,7 +3801,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l931"><code>src&#x2F;jquery.gridster.js:931</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l975"><code>src&#x2F;jquery.gridster.js:975</code></a>
         
         </p>
 
@@ -3723,7 +3888,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l850"><code>src&#x2F;jquery.gridster.js:850</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l894"><code>src&#x2F;jquery.gridster.js:894</code></a>
         
         </p>
 
@@ -3848,7 +4013,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l869"><code>src&#x2F;jquery.gridster.js:869</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l913"><code>src&#x2F;jquery.gridster.js:913</code></a>
         
         </p>
 
@@ -3973,7 +4138,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l823"><code>src&#x2F;jquery.gridster.js:823</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l867"><code>src&#x2F;jquery.gridster.js:867</code></a>
         
         </p>
 
@@ -4092,7 +4257,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l837"><code>src&#x2F;jquery.gridster.js:837</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l881"><code>src&#x2F;jquery.gridster.js:881</code></a>
         
         </p>
 
@@ -4202,7 +4367,7 @@ the</code>upper<em>rows<code>array. Iteration starts from row specified in</code
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l791"><code>src&#x2F;jquery.gridster.js:791</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l835"><code>src&#x2F;jquery.gridster.js:835</code></a>
         
         </p>
 
@@ -4330,7 +4495,7 @@ HTMLElements.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l808"><code>src&#x2F;jquery.gridster.js:808</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l852"><code>src&#x2F;jquery.gridster.js:852</code></a>
         
         </p>
 
@@ -4456,7 +4621,7 @@ and col given.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l889"><code>src&#x2F;jquery.gridster.js:889</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l933"><code>src&#x2F;jquery.gridster.js:933</code></a>
         
         </p>
 
@@ -4582,7 +4747,7 @@ else returns the jQuery HTMLElement
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l914"><code>src&#x2F;jquery.gridster.js:914</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l958"><code>src&#x2F;jquery.gridster.js:958</code></a>
         
         </p>
 
@@ -4714,7 +4879,7 @@ params and if this is under the widget that is being dragged.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l745"><code>src&#x2F;jquery.gridster.js:745</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l789"><code>src&#x2F;jquery.gridster.js:789</code></a>
         
         </p>
 
@@ -4856,7 +5021,7 @@ each widget) in descending way.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1357"><code>src&#x2F;jquery.gridster.js:1357</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1410"><code>src&#x2F;jquery.gridster.js:1410</code></a>
         
         </p>
 
@@ -4975,7 +5140,7 @@ each widget) in descending way.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1268"><code>src&#x2F;jquery.gridster.js:1268</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1321"><code>src&#x2F;jquery.gridster.js:1321</code></a>
         
         </p>
 
@@ -5087,7 +5252,7 @@ if they can.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1311"><code>src&#x2F;jquery.gridster.js:1311</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1364"><code>src&#x2F;jquery.gridster.js:1364</code></a>
         
         </p>
 
@@ -5213,7 +5378,7 @@ if they can.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l173"><code>src&#x2F;jquery.gridster.js:173</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l159"><code>src&#x2F;jquery.gridster.js:159</code></a>
         
         </p>
 
@@ -5335,7 +5500,7 @@ if they can.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l444"><code>src&#x2F;jquery.gridster.js:444</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l452"><code>src&#x2F;jquery.gridster.js:452</code></a>
         
         </p>
 
@@ -5448,7 +5613,7 @@ if they can.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l521"><code>src&#x2F;jquery.gridster.js:521</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l545"><code>src&#x2F;jquery.gridster.js:545</code></a>
         
         </p>
 
@@ -5576,7 +5741,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l561"><code>src&#x2F;jquery.gridster.js:561</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l585"><code>src&#x2F;jquery.gridster.js:585</code></a>
         
         </p>
 
@@ -5700,7 +5865,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l395"><code>src&#x2F;jquery.gridster.js:395</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l400"><code>src&#x2F;jquery.gridster.js:400</code></a>
         
         </p>
 
@@ -5807,7 +5972,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1206"><code>src&#x2F;jquery.gridster.js:1206</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1259"><code>src&#x2F;jquery.gridster.js:1259</code></a>
         
         </p>
 
@@ -5911,7 +6076,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1218"><code>src&#x2F;jquery.gridster.js:1218</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1271"><code>src&#x2F;jquery.gridster.js:1271</code></a>
         
         </p>
 
@@ -6017,7 +6182,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l470"><code>src&#x2F;jquery.gridster.js:470</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l489"><code>src&#x2F;jquery.gridster.js:489</code></a>
         
         </p>
 
@@ -6124,7 +6289,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1230"><code>src&#x2F;jquery.gridster.js:1230</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1283"><code>src&#x2F;jquery.gridster.js:1283</code></a>
         
         </p>
 
@@ -6228,7 +6393,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1248"><code>src&#x2F;jquery.gridster.js:1248</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1301"><code>src&#x2F;jquery.gridster.js:1301</code></a>
         
         </p>
 
@@ -6322,7 +6487,7 @@ overlapped or stops being overlapped.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1958"><code>src&#x2F;jquery.gridster.js:1958</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l2063"><code>src&#x2F;jquery.gridster.js:2063</code></a>
         
         </p>
 
@@ -6394,7 +6559,7 @@ the browser is resized.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l277"><code>src&#x2F;jquery.gridster.js:277</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l265"><code>src&#x2F;jquery.gridster.js:265</code></a>
         
         </p>
 
@@ -6476,7 +6641,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l326"><code>src&#x2F;jquery.gridster.js:326</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l329"><code>src&#x2F;jquery.gridster.js:329</code></a>
         
         </p>
 
@@ -6581,7 +6746,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l217"><code>src&#x2F;jquery.gridster.js:217</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l201"><code>src&#x2F;jquery.gridster.js:201</code></a>
         
         </p>
 
@@ -6685,7 +6850,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l243"><code>src&#x2F;jquery.gridster.js:243</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l231"><code>src&#x2F;jquery.gridster.js:231</code></a>
         
         </p>
 
@@ -6783,7 +6948,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l265"><code>src&#x2F;jquery.gridster.js:265</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l253"><code>src&#x2F;jquery.gridster.js:253</code></a>
         
         </p>
 
@@ -6871,7 +7036,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1520"><code>src&#x2F;jquery.gridster.js:1520</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1573"><code>src&#x2F;jquery.gridster.js:1573</code></a>
         
         </p>
 
@@ -6980,7 +7145,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1841"><code>src&#x2F;jquery.gridster.js:1841</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1927"><code>src&#x2F;jquery.gridster.js:1927</code></a>
         
         </p>
 
@@ -7067,7 +7232,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l953"><code>src&#x2F;jquery.gridster.js:953</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l997"><code>src&#x2F;jquery.gridster.js:997</code></a>
         
         </p>
 
@@ -7194,7 +7359,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l597"><code>src&#x2F;jquery.gridster.js:597</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l621"><code>src&#x2F;jquery.gridster.js:621</code></a>
         
         </p>
 
@@ -7315,7 +7480,7 @@ mapped array of positions.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l686"><code>src&#x2F;jquery.gridster.js:686</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l710"><code>src&#x2F;jquery.gridster.js:710</code></a>
         
         </p>
 
@@ -7420,7 +7585,7 @@ each widget) in ascending way.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l706"><code>src&#x2F;jquery.gridster.js:706</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l750"><code>src&#x2F;jquery.gridster.js:750</code></a>
         
         </p>
 
@@ -7476,6 +7641,111 @@ coords of each widget) in ascending way.</p>
     
 
     
+</div>
+
+                
+                    <div id="method_sort_by_row_asc" class="method item">
+    <h3 class="name"><code>sort_by_row_asc</code></h3>
+
+    
+        <div class="args">
+            <span class="paren">(</span><ul class="args-list inline commas">
+            
+                <li class="arg">
+                    
+                        <code>widgets</code>
+                    
+                </li>
+            
+            </ul><span class="paren">)</span>
+        </div>
+    
+
+    
+        <span class="returns-inline">
+            <span class="type">Array</span>
+        </span>
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    <div class="meta">
+        
+            
+                
+                <p>
+                
+                Defined in
+                
+            
+        
+        
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l730"><code>src&#x2F;jquery.gridster.js:730</code></a>
+        
+        </p>
+
+
+        
+
+        
+    </div>
+
+    <div class="description">
+        <p>Sorts an Array of grid coords objects (representing the grid coords of
+each widget) placing first the empty cells upper left.</p>
+    </div>
+
+    
+        <div class="params">
+            <h4>Parameters:</h4>
+
+            <ul class="params-list">
+            
+                <li class="param">
+                    
+                        <code class="param-name">widgets</code>
+                        <span class="type">Array</span>
+                    
+
+                    
+
+                    <div class="param-description">
+                        <p>Array of grid coords objects</p>
+                    </div>
+
+                    
+                </li>
+            
+            </ul>
+        </div>
+    
+
+    
+        <div class="returns">
+            <h4>Returns:</h4>
+
+            <div class="returns-description">
+                
+                    
+                        <span class="type">Array</span>:
+                    
+                    Returns the array sorted.
+                
+            </div>
+        </div>
+    
+
+    
 </div>
 
                 
@@ -7525,7 +7795,7 @@ coords of each widget) in ascending way.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l726"><code>src&#x2F;jquery.gridster.js:726</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l770"><code>src&#x2F;jquery.gridster.js:770</code></a>
         
         </p>
 
@@ -7636,7 +7906,7 @@ each widget) in descending way.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l305"><code>src&#x2F;jquery.gridster.js:305</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l308"><code>src&#x2F;jquery.gridster.js:308</code></a>
         
         </p>
 
@@ -7759,7 +8029,7 @@ the grid coords object passed in the <code>grid_data</code> param.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1491"><code>src&#x2F;jquery.gridster.js:1491</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l1544"><code>src&#x2F;jquery.gridster.js:1544</code></a>
         
         </p>
 
@@ -7863,7 +8133,7 @@ the grid coords object passed in the <code>grid_data</code> param.</p>
             
         
         
-        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l650"><code>src&#x2F;jquery.gridster.js:650</code></a>
+        <a href="..&#x2F;files&#x2F;src_jquery.gridster.js.html#l674"><code>src&#x2F;jquery.gridster.js:674</code></a>
         
         </p>
 
diff --git a/docs/data.json b/docs/data.json
index 45ae5c0f72..63b56646c8 100644
--- a/docs/data.json
+++ b/docs/data.json
@@ -19,6 +19,15 @@
             "fors": {},
             "namespaces": {}
         },
+        "src/jquery.draggable.js": {
+            "name": "src/jquery.draggable.js",
+            "modules": {},
+            "classes": {
+                "Draggable": 1
+            },
+            "fors": {},
+            "namespaces": {}
+        },
         "src/jquery.gridster.js": {
             "name": "src/jquery.gridster.js",
             "modules": {},
@@ -104,7 +113,7 @@
             ],
             "file": "src/jquery.coords.js",
             "line": 10,
-            "description": "Coords description",
+            "description": "Coords",
             "params": [
                 {
                     "name": "obj",
@@ -114,6 +123,19 @@
             ],
             "is_constructor": 1
         },
+        "Draggable": {
+            "name": "Draggable",
+            "shortname": "Draggable",
+            "classitems": [],
+            "plugins": [],
+            "extensions": [],
+            "plugin_for": [],
+            "extension_for": [],
+            "file": "src/jquery.draggable.js",
+            "line": 24,
+            "description": "Draggable",
+            "is_constructor": 1
+        },
         "Gridster": {
             "name": "Gridster",
             "shortname": "Gridster",
@@ -123,7 +145,7 @@
             "plugin_for": [],
             "extension_for": [],
             "file": "src/jquery.gridster.js",
-            "line": 70,
+            "line": 33,
             "uses": [
                 "Coords",
                 "Collision"
@@ -215,7 +237,31 @@
     "classitems": [
         {
             "file": "src/jquery.gridster.js",
-            "line": 140,
+            "line": 105,
+            "description": "Disable dragging.",
+            "itemtype": "method",
+            "name": "enable",
+            "return": {
+                "description": "Returns the instance of the Gridster Class.",
+                "type": "Class"
+            },
+            "class": "Gridster"
+        },
+        {
+            "file": "src/jquery.gridster.js",
+            "line": 117,
+            "description": "Enable dragging.",
+            "itemtype": "method",
+            "name": "enable",
+            "return": {
+                "description": "Returns the instance of the Gridster Class.",
+                "type": "Class"
+            },
+            "class": "Gridster"
+        },
+        {
+            "file": "src/jquery.gridster.js",
+            "line": 129,
             "description": "Add a new widget to the grid.",
             "itemtype": "method",
             "name": "add_widget",
@@ -237,14 +283,14 @@
                 }
             ],
             "return": {
-                "description": "Returns the jQuery wrapped HTMLElement representing\n the widget that was just created.",
+                "description": "Returns the jQuery wrapped HTMLElement representing.\n the widget that was just created.",
                 "type": "HTMLElement"
             },
             "class": "Gridster"
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 173,
+            "line": 159,
             "description": "Get the most left column below to add a new widget.",
             "itemtype": "method",
             "name": "next_position",
@@ -268,7 +314,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 217,
+            "line": 201,
             "description": "Remove a widget from the grid.",
             "itemtype": "method",
             "name": "remove_widget",
@@ -287,7 +333,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 243,
+            "line": 231,
             "description": "Returns a serialized array of the widgets in the grid.",
             "itemtype": "method",
             "name": "serialize",
@@ -307,7 +353,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 265,
+            "line": 253,
             "description": "Returns a serialized array of the widgets that have changed their position.",
             "itemtype": "method",
             "name": "serialize_changed",
@@ -319,7 +365,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 277,
+            "line": 265,
             "description": "Creates the grid coords object representing the widget a add it to the\nmapped array of positions.",
             "itemtype": "method",
             "name": "register_widget",
@@ -331,7 +377,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 305,
+            "line": 308,
             "description": "Update in the mapped array of positions the value of cells represented by\nthe grid coords object passed in the `grid_data` param.",
             "params": [
                 {
@@ -355,7 +401,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 326,
+            "line": 329,
             "description": "Remove a widget from the mapped array of positions.",
             "itemtype": "method",
             "name": "remove_from_gridmap",
@@ -374,7 +420,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 339,
+            "line": 342,
             "description": "Add a widget to the mapped array of positions.",
             "itemtype": "method",
             "name": "add_to_gridmap",
@@ -398,7 +444,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 361,
+            "line": 364,
             "description": "Make widgets draggable. It Wraps the jQuery UI Draggable Plugin.",
             "itemtype": "method",
             "name": "draggable",
@@ -410,7 +456,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 395,
+            "line": 400,
             "description": "This function is executed when the player begins to be dragged.",
             "itemtype": "method",
             "name": "on_start_drag",
@@ -430,7 +476,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 444,
+            "line": 452,
             "description": "This function is executed when the player is being dragged.",
             "itemtype": "method",
             "name": "on_drag",
@@ -450,7 +496,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 470,
+            "line": 489,
             "description": "This function is executed when the player stops being dragged.",
             "itemtype": "method",
             "name": "on_stop_drag",
@@ -470,7 +516,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 521,
+            "line": 545,
             "description": "Executes the callbacks passed as arguments when a column begins to be\noverlapped or stops being overlapped.",
             "params": [
                 {
@@ -494,7 +540,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 561,
+            "line": 585,
             "description": "Executes the callbacks passed as arguments when a row starts to be\noverlapped or stops being overlapped.",
             "params": [
                 {
@@ -518,7 +564,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 597,
+            "line": 621,
             "description": "Sets the current position of the player",
             "params": [
                 {
@@ -542,7 +588,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 650,
+            "line": 674,
             "description": "See which of the widgets in the $widgets param collection can go to\na upper row and which not.",
             "itemtype": "method",
             "name": "widgets_contraints",
@@ -561,7 +607,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 686,
+            "line": 710,
             "description": "Sorts an Array of grid coords objects (representing the grid coords of\neach widget) in ascending way.",
             "itemtype": "method",
             "name": "sort_by_row_asc",
@@ -580,7 +626,26 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 706,
+            "line": 730,
+            "description": "Sorts an Array of grid coords objects (representing the grid coords of\neach widget) placing first the empty cells upper left.",
+            "itemtype": "method",
+            "name": "sort_by_row_asc",
+            "params": [
+                {
+                    "name": "widgets",
+                    "description": "Array of grid coords objects",
+                    "type": "Array"
+                }
+            ],
+            "return": {
+                "description": "Returns the array sorted.",
+                "type": "Array"
+            },
+            "class": "Gridster"
+        },
+        {
+            "file": "src/jquery.gridster.js",
+            "line": 750,
             "description": "Sorts an Array of grid coords objects by column (representing the grid\ncoords of each widget) in ascending way.",
             "itemtype": "method",
             "name": "sort_by_row_asc",
@@ -599,7 +664,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 726,
+            "line": 770,
             "description": "Sorts an Array of grid coords objects (representing the grid coords of\neach widget) in descending way.",
             "itemtype": "method",
             "name": "sort_by_row_desc",
@@ -618,7 +683,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 745,
+            "line": 789,
             "description": "Sorts an Array of grid coords objects (representing the grid coords of\neach widget) in descending way.",
             "itemtype": "method",
             "name": "manage_movements",
@@ -647,7 +712,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 791,
+            "line": 835,
             "description": "Determines if there is a widget in the row and col given. Or if the\nHTMLElement passed as first argument is the player.",
             "itemtype": "method",
             "name": "is_player",
@@ -672,7 +737,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 808,
+            "line": 852,
             "description": "Determines if the widget that is being dragged is currently over the row\nand col given.",
             "itemtype": "method",
             "name": "is_player_in",
@@ -696,7 +761,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 823,
+            "line": 867,
             "description": "Determines if the placeholder is currently over the row and col given.",
             "itemtype": "method",
             "name": "is_placeholder_in",
@@ -720,7 +785,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 837,
+            "line": 881,
             "description": "Determines if the placeholder is currently over the column given.",
             "itemtype": "method",
             "name": "is_placeholder_in_col",
@@ -739,7 +804,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 850,
+            "line": 894,
             "description": "Determines if the cell represented by col and row params is empty.",
             "itemtype": "method",
             "name": "is_empty",
@@ -763,7 +828,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 869,
+            "line": 913,
             "description": "Determines if the cell represented by col and row params is occupied.",
             "itemtype": "method",
             "name": "is_occupied",
@@ -787,7 +852,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 889,
+            "line": 933,
             "description": "Determines if there is a widget in the cell represented by col/row params.",
             "itemtype": "method",
             "name": "is_widget",
@@ -811,7 +876,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 914,
+            "line": 958,
             "description": "Determines if there is a widget in the cell represented by col/row\nparams and if this is under the widget that is being dragged.",
             "itemtype": "method",
             "name": "is_widget_under_player",
@@ -835,7 +900,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 931,
+            "line": 975,
             "description": "Get widgets overlapping with the player.",
             "itemtype": "method",
             "name": "get_widgets_under_player",
@@ -847,7 +912,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 953,
+            "line": 997,
             "description": "Put placeholder at the row and column specified.",
             "itemtype": "method",
             "name": "set_placeholder",
@@ -871,7 +936,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 995,
+            "line": 1048,
             "description": "Determines whether the player can move to a position above.",
             "itemtype": "method",
             "name": "can_go_player_up",
@@ -890,7 +955,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1044,
+            "line": 1097,
             "description": "Determines whether a widget can move to a position above.",
             "itemtype": "method",
             "name": "can_go_widget_up",
@@ -909,7 +974,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1095,
+            "line": 1148,
             "description": "Search a valid row for the widget represented by `widget_grid_data' in\nthe `upper_rows` array. Iteration starts from row specified in `min_row`.",
             "itemtype": "method",
             "name": "get_valid_rows",
@@ -938,7 +1003,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1173,
+            "line": 1226,
             "description": "Get widgets overlapping with the player.",
             "itemtype": "method",
             "name": "get_widgets_overlapped",
@@ -950,7 +1015,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1206,
+            "line": 1259,
             "description": "This callback is executed when the player begins to collide with a column.",
             "itemtype": "method",
             "name": "on_start_overlapping_column",
@@ -969,7 +1034,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1218,
+            "line": 1271,
             "description": "A callback executed when the player begins to collide with a row.",
             "itemtype": "method",
             "name": "on_start_overlapping_row",
@@ -988,7 +1053,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1230,
+            "line": 1283,
             "description": "A callback executed when the the player ends to collide with a column.",
             "itemtype": "method",
             "name": "on_stop_overlapping_column",
@@ -1007,7 +1072,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1248,
+            "line": 1301,
             "description": "This callback is executed when the player ends to collide with a row.",
             "itemtype": "method",
             "name": "on_stop_overlapping_row",
@@ -1026,7 +1091,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1268,
+            "line": 1321,
             "description": "Move a widget to a specific row. The cell or cells must be empty.\nIf the widget has widgets below, all of these widgets will be moved also\nif they can.",
             "itemtype": "method",
             "name": "move_widget_to",
@@ -1045,7 +1110,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1311,
+            "line": 1364,
             "description": "Move up the specified widget and all below it.",
             "itemtype": "method",
             "name": "move_widget_up",
@@ -1070,7 +1135,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1357,
+            "line": 1410,
             "description": "Move down the specified widget and all below it.",
             "itemtype": "method",
             "name": "move_widget_down",
@@ -1094,7 +1159,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1402,
+            "line": 1455,
             "description": "Check if the widget can move to the specified row, else returns the\nupper row possible.",
             "itemtype": "method",
             "name": "can_go_up_to_row",
@@ -1123,7 +1188,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1491,
+            "line": 1544,
             "description": "Get widgets below a widget.",
             "itemtype": "method",
             "name": "widgets_below",
@@ -1142,7 +1207,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1520,
+            "line": 1573,
             "description": "Update the array of mapped positions with the new player position.",
             "itemtype": "method",
             "name": "set_cells_player_occupies",
@@ -1166,7 +1231,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1537,
+            "line": 1590,
             "description": "Remove from the array of mapped positions the reference to the player.",
             "itemtype": "method",
             "name": "empty_cells_player_occupies",
@@ -1178,7 +1243,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1574,
+            "line": 1627,
             "description": "Check if it's possible to move a widget to a specific col/row. It takes\ninto account the dimensions (`size_y` and `size_x` attrs. of the grid coords\n object) the widget occupies.",
             "itemtype": "method",
             "name": "can_move_to",
@@ -1207,7 +1272,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1608,
+            "line": 1667,
             "description": "Given the leftmost column returns all columns that are overlapping with the player.",
             "itemtype": "method",
             "name": "get_targeted_columns",
@@ -1227,7 +1292,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1626,
+            "line": 1685,
             "description": "Given the upper row returns all rows that are overlapping with the player.",
             "itemtype": "method",
             "name": "get_targeted_rows",
@@ -1247,7 +1312,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1643,
+            "line": 1702,
             "description": "Get all columns and rows that a widget occupies.",
             "itemtype": "method",
             "name": "get_cells_occupied",
@@ -1266,7 +1331,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1671,
+            "line": 1730,
             "description": "Iterate over the cells occupied by a widget executing a function for\neach one.",
             "itemtype": "method",
             "name": "for_each_cell_occupied",
@@ -1290,7 +1355,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1692,
+            "line": 1751,
             "description": "Iterate over the columns occupied by a widget executing a function for\neach one.",
             "itemtype": "method",
             "name": "for_each_column_occupied",
@@ -1314,7 +1379,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1711,
+            "line": 1770,
             "description": "Iterate over the rows occupied by a widget executing a function for\neach one.",
             "itemtype": "method",
             "name": "for_each_row_occupied",
@@ -1338,7 +1403,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1777,
+            "line": 1836,
             "description": "Iterate over each widget above the column and row specified.",
             "itemtype": "method",
             "name": "for_each_widget_above",
@@ -1367,7 +1432,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1793,
+            "line": 1852,
             "description": "Iterate over each widget below the column and row specified.",
             "itemtype": "method",
             "name": "for_each_widget_below",
@@ -1396,7 +1461,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1809,
+            "line": 1868,
             "description": "Returns the highest occupied cell in the grid.",
             "itemtype": "method",
             "name": "get_highest_occupied_cell",
@@ -1408,7 +1473,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1841,
+            "line": 1927,
             "description": "Set the current height of the parent grid.",
             "itemtype": "method",
             "name": "set_dom_grid_height",
@@ -1420,7 +1485,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1855,
+            "line": 1941,
             "description": "It generates the neccessary styles to position the widgets.",
             "itemtype": "method",
             "name": "generate_stylesheet",
@@ -1444,7 +1509,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1899,
+            "line": 2004,
             "description": "Injects the given CSS as string to the head of the document.",
             "itemtype": "method",
             "name": "add_style_tag",
@@ -1463,7 +1528,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1922,
+            "line": 2027,
             "description": "Generates a faux grid to collide with it when a widget is dragged and\ndetect row or column that we want to go.",
             "itemtype": "method",
             "name": "generate_faux_grid",
@@ -1487,7 +1552,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1958,
+            "line": 2063,
             "description": "Recalculates the offsets for the faux grid. You need to use it when\nthe browser is resized.",
             "itemtype": "method",
             "name": "recalculate_faux_grid",
@@ -1499,7 +1564,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1982,
+            "line": 2087,
             "description": "Get all widgets in the DOM and register them.",
             "itemtype": "method",
             "name": "get_widgets_from_DOM",
@@ -1511,7 +1576,7 @@
         },
         {
             "file": "src/jquery.gridster.js",
-            "line": 1996,
+            "line": 2101,
             "description": "Calculate columns and rows to be set based on the configuration\n parameters, grid dimensions, etc ...",
             "itemtype": "method",
             "name": "generate_grid_and_stylesheet",
diff --git a/docs/files/src_jquery.collision.js.html b/docs/files/src_jquery.collision.js.html
index 18bf3441af..0d078d2bd7 100644
--- a/docs/files/src_jquery.collision.js.html
+++ b/docs/files/src_jquery.collision.js.html
@@ -46,6 +46,8 @@
             
                 <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
@@ -211,18 +213,18 @@
       }
     };
 
-    fn.find_collisions = function(){
+    fn.find_collisions = function(player_data_coords){
       var self = this;
       var colliders_coords = [];
       var colliders_data = [];
       var $colliders = (this.colliders || this.$colliders);
       var count = $colliders.length;
+      var player_coords = self.$element.coords().update(player_data_coords || false).get();
 
       while(count--){
         var $collider = self.$colliders ? $($colliders[count]) : $colliders[count];
-        var player_coords = self.$element.coords().update().get();
         var $collider_coords_ins = ($collider.isCoords) ?
-                $collider.update() : $collider.coords();
+                $collider : $collider.coords();
         var collider_coords = $collider_coords_ins.get();
         var overlaps = self.overlaps(player_coords, collider_coords);
 
@@ -262,8 +264,8 @@
     };
 
 
-    fn.get_closest_colliders = function(){
-      var colliders = this.find_collisions();
+    fn.get_closest_colliders = function(player_data_coords){
+      var colliders = this.find_collisions(player_data_coords);
       var min_area = 100;
       colliders.sort(function(a, b){
 
diff --git a/docs/files/src_jquery.coords.js.html b/docs/files/src_jquery.coords.js.html
index 0b0b63e7bc..ef5dd34b99 100644
--- a/docs/files/src_jquery.coords.js.html
+++ b/docs/files/src_jquery.coords.js.html
@@ -46,6 +46,8 @@
             
                 <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
@@ -101,7 +103,7 @@
 
 ;(function($, window, document, undefined){
     &#x2F;**
-    * Coords description
+    * Coords
     *
     * @class Coords
     * @param {HTMLElement|Object} obj HTMLElement or a literal Object with the left, top, width and height properties.
@@ -127,12 +129,20 @@
         this.original_coords = this.get();
     };
 
-    fn.set = function() {
+
+    fn.set = function(update, not_update_offsets) {
         var el = this.el;
-        if (el) {
-            this.data = el.offset();
-            this.data.width || (this.data.width = el.width());
-            this.data.height || (this.data.height = el.height());
+
+        if (el &amp;&amp; !update) {
+            this.data = {} || el.offset();
+            this.data.width = el.width();
+            this.data.height = el.height();
+        };
+
+        if (el &amp;&amp; update &amp;&amp; !not_update_offsets) {
+            var offset = el.offset();
+            this.data.top = offset.top;
+            this.data.left = offset.left;
         }
 
         var d = this.data;
@@ -150,19 +160,23 @@
         return this;
     };
 
+
     fn.update = function(data){
         if (!data &amp;&amp; !this.el) {
             return this;
         }
 
         if (data) {
-            var new_data = $.extend(this.data, data);
+            var new_data = $.extend({}, this.data, data);
             this.data = new_data;
+            return this.set(true, true);
         }
-        this.set();
+
+        this.set(true);
         return this;
     };
 
+
     fn.get = function(){
         return this.coords;
     };
diff --git a/docs/files/src_jquery.draggable.js.html b/docs/files/src_jquery.draggable.js.html
new file mode 100644
index 0000000000..01b39af04c
--- /dev/null
+++ b/docs/files/src_jquery.draggable.js.html
@@ -0,0 +1,338 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>src&#x2F;jquery.draggable.js</title>
+    <link rel="stylesheet" href="http:&#x2F;&#x2F;yui.yahooapis.com&#x2F;3.5.1&#x2F;build&#x2F;cssgrids&#x2F;cssgrids-min.css">
+    <link rel="stylesheet" href="..&#x2F;assets/vendor/prettify/prettify-min.css">
+    <link rel="stylesheet" href="..&#x2F;assets/css/main.css" id="site_styles">
+    <link rel="shortcut icon" type="image/png" href="..&#x2F;assets/favicon.png">
+    <script src="http:&#x2F;&#x2F;yui.yahooapis.com&#x2F;combo?3.5.1&#x2F;build&#x2F;yui&#x2F;yui-min.js"></script>
+</head>
+<body class="yui3-skin-sam">
+
+<div id="doc">
+    <div id="hd" class="yui3-g header">
+        <div class="yui3-u-3-4">
+            
+                <!-- <h1><img src="..&#x2F;assets/css/logo.png" title=""></h1> -->
+                <h1><img src="http://ducksboard.com/wp-content/themes/blog-theme-ducksboard/images/ducksboard.png" title=""></h1>
+            
+        </div>
+        <div class="yui3-u-1-4 version">
+            <em>API Docs for: </em>
+        </div>
+    </div>
+    <div id="bd" class="yui3-g">
+
+        <div class="yui3-u-1-4">
+            <div id="docs-sidebar" class="sidebar apidocs">
+                <div id="api-list">
+    <h2 class="off-left">APIs</h2>
+    <div id="api-tabview" class="tabview">
+        <ul class="tabs">
+            <li><a href="#api-classes">Classes</a></li>
+            <li><a href="#api-modules">Modules</a></li>
+        </ul>
+
+        <div id="api-tabview-filter">
+            <input type="search" id="api-filter" placeholder="Type to filter APIs">
+        </div>
+
+        <div id="api-tabview-panel">
+            <ul id="api-classes" class="apis classes">
+            
+                <li><a href="..&#x2F;classes/Collision.html">Collision</a></li>
+            
+                <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
+            
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
+                <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
+            
+            </ul>
+
+            <ul id="api-modules" class="apis modules">
+            
+            </ul>
+        </div>
+    </div>
+</div>
+
+            </div>
+        </div>
+        <div class="yui3-u-3-4">
+                <div id="api-options">
+        Show:
+        <label for="api-show-inherited">
+            <input type="checkbox" id="api-show-inherited" checked>
+            Inherited
+        </label>
+
+        <label for="api-show-protected">
+            <input type="checkbox" id="api-show-protected">
+            Protected
+        </label>
+
+        <label for="api-show-private">
+            <input type="checkbox" id="api-show-private">
+            Private
+        </label>
+        <label for="api-show-deprecated">
+            <input type="checkbox" id="api-show-deprecated">
+            Deprecated
+        </label>
+
+    </div>
+
+
+            <div class="apidocs">
+                <div id="docs-main">
+                    <div class="content">
+                        <h1 class="file-heading">File: src&#x2F;jquery.draggable.js</h1>
+
+<div class="file">
+    <pre class="code prettyprint linenums">
+&#x2F;*
+ * jquery.draggable
+ * https:&#x2F;&#x2F;github.com&#x2F;ducksboard&#x2F;gridster.js
+ *
+ * Copyright (c) 2012 ducksboard
+ * Licensed under the MIT, GPL licenses.
+ *&#x2F;
+
+;(function($, window, document, undefined){
+
+    var defaults = {
+        items: &#x27;.gs_w&#x27;,
+        distance: 1,
+        limit: true,
+        offset_left: 0,
+        drag: function(e){},
+        start : function(e, ui){},
+        stop : function(e){}
+    };
+
+    var $body = $(document.body);
+
+
+    &#x2F;**
+    * Draggable
+    *
+    * @class Draggable
+    * @constructor
+    *&#x2F;
+    function Draggable(element, options) {
+      this.options = $.extend(defaults, options);
+      this.$container = $(element);
+      this.$dragitems = $(this.options.items, this.$container);
+      this.is_dragging = false;
+      this.player_min_left = 0 + this.options.offset_left;
+
+      this.init();
+    };
+
+    var fn = Draggable.prototype;
+
+    fn.init = function() {
+        this.$container.css(&#x27;position&#x27;, &#x27;relative&#x27;);
+        this.enable();
+    };
+
+    fn.get_actual_pos = function($el) {
+        var pos = $el.position();
+        return pos;
+    };
+
+
+    fn.get_mouse_pos = function(e) {
+        return {
+            left: e.clientX,
+            top: e.clientY
+        };
+    };
+
+
+    fn.drag_handler = function(e) {
+        var self = this;
+        var first = true;
+        this.$player = $(e.currentTarget);
+
+        this.el_init_pos = this.get_actual_pos(this.$player);
+        this.mouse_init_pos = this.get_mouse_pos(e);
+
+        $body.on(&#x27;mousemove.draggable&#x27;, function(mme){
+            var mouse_actual_pos = self.get_mouse_pos(mme);
+            var diff_x = Math.abs(mouse_actual_pos.left - self.mouse_init_pos.left);
+            var diff_y = Math.abs(mouse_actual_pos.top - self.mouse_init_pos.top);
+            if (!(diff_x &gt; self.options.distance || diff_y &gt; self.options.distance)) {
+                return false;
+            }
+
+            if (first) {
+                first = false;
+                self.on_dragstart.call(self, mme);
+                return false;
+            }
+
+            if (self.is_dragging == true) {
+                throttle(self.on_dragmove.call(self, mme), 130);
+            };
+
+            return false;
+
+        });
+
+        return false;
+    };
+
+
+    fn.on_dragstart = function(e) {
+        e.preventDefault();
+        this.drag_start = true;
+        this.is_dragging = true;
+        this.$container_offset = this.$container.offset();
+        if (this.options.helper === &#x27;clone&#x27;) {
+            this.$helper = this.$player.clone().appendTo(this.$container).addClass(&#x27;helper&#x27;);
+            this.helper = true;
+        }else{
+            this.helper = false;
+        }
+        this.el_init_offset = this.$player.offset();
+        this.player_width = this.$player.width();
+        this.player_max_left = this.$container.width() - this.player_width + this.options.offset_left;
+        if (this.options.start) {
+            this.options.start.call(this.$player, e, {
+                helper: this.helper ? this.$helper : this.$player
+            });
+        };
+        return false;
+    };
+
+
+    fn.get_offset = function(e) {
+        e.preventDefault();
+        var mouse_actual_pos = this.get_mouse_pos(e);
+        var diff_x = mouse_actual_pos.left - this.mouse_init_pos.left;
+        var diff_y = mouse_actual_pos.top - this.mouse_init_pos.top;
+
+        var left = this.el_init_offset.left + diff_x - this.$container_offset.left;
+        var top = this.el_init_offset.top + diff_y - this.$container_offset.top;
+
+        if (this.options.limit) {
+            if (left &gt; this.player_max_left) {
+                left = this.player_max_left;
+            }else if(left &lt; this.player_min_left) {
+                left = this.player_min_left;
+            }
+        };
+
+        return {
+            left: left,
+            top: top
+        }
+    };
+
+
+    fn.on_dragmove = function(e) {
+        var offset = this.get_offset(e);
+
+        (this.helper ? this.$helper : this.$player).css({
+            &#x27;position&#x27;: &#x27;absolute&#x27;,
+            &#x27;left&#x27; : offset.left,
+            &#x27;top&#x27; : offset.top
+        });
+
+        var ui = {
+            &#x27;position&#x27;: {
+                &#x27;left&#x27;: offset.left,
+                &#x27;top&#x27;: offset.top
+            }
+        };
+
+        if (this.options.drag) {
+            this.options.drag.call(this.$player, e, ui);
+        }
+        return false;
+    };
+
+
+    fn.on_dragstop = function(e) {
+        var offset = this.get_offset(e);
+
+        this.drag_start = false;
+
+        var ui = {
+            &#x27;position&#x27;: {
+                &#x27;left&#x27;: offset.left,
+                &#x27;top&#x27;: offset.top
+            }
+        }
+
+        if (this.options.stop) {
+            this.options.stop.call(this.$player, e, ui);
+        }
+
+        if (this.helper) {
+            this.$helper.remove();
+        }
+
+        return false;
+    };
+
+
+    fn.enable = function(){
+        this.$container.on(&#x27;mousedown.draggable&#x27;, this.options.items, $.proxy(this.drag_handler, this));
+        $body.on(&#x27;mouseup.draggable&#x27;, $.proxy(function(e) {
+            this.is_dragging = false;
+            $body.off(&#x27;mousemove.draggable&#x27;);
+            if (this.drag_start) {
+                this.on_dragstop(e);
+            }
+        }, this));
+    };
+
+
+    fn.disable = function(){
+        this.$container.off(&#x27;mousedown.draggable&#x27;);
+        $body.off(&#x27;mouseup.draggable&#x27;);
+    };
+
+
+    fn.destroy = function(){
+        this.disable();
+        $.removeData(this.$container, &#x27;draggable&#x27;);
+    };
+
+
+    &#x2F;&#x2F;jQuery adapter
+    $.fn.draggable = function ( options ) {
+        return this.each(function () {
+            if (!$.data(this, &#x27;draggable&#x27;)) {
+                $.data(this, &#x27;draggable&#x27;, new Draggable( this, options ));
+            }
+        });
+    };
+
+
+}(jQuery, window, document));
+
+    </pre>
+</div>
+
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+<script src="..&#x2F;assets/vendor/prettify/prettify-min.js"></script>
+<script>prettyPrint();</script>
+<script src="..&#x2F;assets/js/yui-prettify.js"></script>
+<script src="..&#x2F;assets/../api.js"></script>
+<script src="..&#x2F;assets/js/api-filter.js"></script>
+<script src="..&#x2F;assets/js/api-list.js"></script>
+<script src="..&#x2F;assets/js/api-search.js"></script>
+<script src="..&#x2F;assets/js/apidocs.js"></script>
+</body>
+</html>
diff --git a/docs/files/src_jquery.gridster.js.html b/docs/files/src_jquery.gridster.js.html
index 4b865c9dcd..4df4a9e481 100644
--- a/docs/files/src_jquery.gridster.js.html
+++ b/docs/files/src_jquery.gridster.js.html
@@ -46,6 +46,8 @@
             
                 <li><a href="..&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href="..&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href="..&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
@@ -109,6 +111,7 @@
         min_cols: 1,
         min_rows: 10,
         autogenerate_stylesheet: true,
+        avoid_overlapped_widgets: true,
         serialize_params: function($w, wgd) {
             return {
                 col: wgd.col,
@@ -116,47 +119,9 @@
             };
         },
         collision: {},
-        draggable: {}
-    };
-
-
-    &#x2F;* Debounce and throttle functions taken from underscore.js *&#x2F;
-    var debounce = function(func, wait, immediate) {
-        var timeout;
-        return function() {
-          var context = this, args = arguments;
-          var later = function() {
-            timeout = null;
-            if (!immediate) func.apply(context, args);
-          };
-          if (immediate &amp;&amp; !timeout) func.apply(context, args);
-          clearTimeout(timeout);
-          timeout = setTimeout(later, wait);
-        };
-    };
-
-
-    var throttle = function(func, wait) {
-        var context, args, timeout, throttling, more, result;
-        var whenDone = debounce(
-            function(){ more = throttling = false; }, wait, true);
-        return function() {
-          context = this; args = arguments;
-          var later = function() {
-            timeout = null;
-            if (more) func.apply(context, args);
-            whenDone();
-          };
-          if (!timeout) timeout = setTimeout(later, wait);
-          if (throttling) {
-            more = true;
-          } else {
-            result = func.apply(context, args);
-          }
-          whenDone();
-          throttling = true;
-          return result;
-        };
+        draggable: {
+            distance: 4
+        }
     };
 
 
@@ -216,6 +181,8 @@
       this.init();
     }
 
+    Gridster.generated_stylesheets = [];
+
     var fn = Gridster.prototype;
 
     fn.init = function() {
@@ -230,6 +197,30 @@
     };
 
 
+    &#x2F;**
+    * Disable dragging.
+    *
+    * @method enable
+    * @return {Class} Returns the instance of the Gridster Class.
+    *&#x2F;
+    fn.disable = function(){
+        this.drag_api.disable();
+        return this;
+    }
+
+
+    &#x2F;**
+    * Enable dragging.
+    *
+    * @method enable
+    * @return {Class} Returns the instance of the Gridster Class.
+    *&#x2F;
+    fn.enable = function(){
+        this.drag_api.enable();
+        return this;
+    }
+
+
     &#x2F;**
     * Add a new widget to the grid.
     *
@@ -237,7 +228,7 @@
     * @param {String} html The string representing the HTML of the widget.
     * @param {Number} size_x The nº of rows the widget occupies horizontally.
     * @param {Number} size_y The nº of columns the widget occupies vertically.
-    * @return {HTMLElement} Returns the jQuery wrapped HTMLElement representing
+    * @return {HTMLElement} Returns the jQuery wrapped HTMLElement representing.
     *  the widget that was just created.
     *&#x2F;
     fn.add_widget = function(html, size_x, size_y) {
@@ -254,12 +245,9 @@
 
         this.register_widget($w);
 
-        this.$widgets.draggable(&#x27;destroy&#x27;);
-        this.draggable();
-
         this.set_dom_grid_height();
 
-        $w.fadeIn();
+        return $w.fadeIn();
     };
 
 
@@ -299,9 +287,7 @@
         }
 
         if (valid_pos.length) {
-            var next_position = this.sort_by_row_desc(valid_pos);
-            next_position = this.sort_by_col_asc(next_position)[0];
-            return next_position;
+            return this.sort_by_row_and_col_asc(valid_pos)[0];
         }
         return false;
     };
@@ -314,7 +300,7 @@
     * @param {HTMLElement} el The jQuery wrapped HTMLElement you want to remove.
     * @return {Class} Returns the instance of the Gridster Class.
     *&#x2F;
-    fn.remove_widget = function(el) {
+    fn.remove_widget = function(el, callback) {
         var $el = el instanceof jQuery ? el : $(el);
         var wgd = $el.coords().grid;
 
@@ -329,6 +315,10 @@
             $nexts.each($.proxy(function(i, widget){
                 this.move_widget_up( $(widget), wgd.size_y );
             }, this));
+
+            if (callback) {
+                callback.apply(this, el);
+            };
         }, this));
     };
 
@@ -375,7 +365,8 @@
     * @return {Array} Returns the instance of the Gridster class.
     *&#x2F;
     fn.register_widget = function($el) {
-        var widget_grid_data = {
+
+        var wgd = {
             &#x27;col&#x27;: parseInt($el.attr(&#x27;data-col&#x27;), 10),
             &#x27;row&#x27;: parseInt($el.attr(&#x27;data-row&#x27;), 10),
             &#x27;size_x&#x27;: parseInt($el.attr(&#x27;data-sizex&#x27;), 10),
@@ -383,13 +374,27 @@
             &#x27;el&#x27;: $el
         };
 
+        if (this.options.avoid_overlapped_widgets &amp;&amp;
+            !this.can_move_to(
+             { size_x: wgd.size_x, size_y: wgd.size_y }, wgd.col, wgd.row)
+        ) {
+            wgd = this.next_position(wgd.size_x, wgd.size_y);
+            wgd.el = $el;
+            $el.attr({
+                &#x27;data-col&#x27;: wgd.col,
+                &#x27;data-row&#x27;: wgd.row,
+                &#x27;data-sizex&#x27;: wgd.size_x,
+                &#x27;data-sizey&#x27;: wgd.size_y
+            });
+        };
+
         &#x2F;&#x2F; attach Coord object to player data-coord attribute
         $el.data(&#x27;coords&#x27;, $el.coords());
 
         &#x2F;&#x2F; Extend Coord object with grid position info
-        $el.data(&#x27;coords&#x27;).grid = widget_grid_data;
+        $el.data(&#x27;coords&#x27;).grid = wgd;
 
-        this.add_to_gridmap(widget_grid_data, $el);
+        this.add_to_gridmap(wgd, $el);
         this.widgets.push($el);
         return this;
     };
@@ -460,28 +465,30 @@
     fn.draggable = function() {
         var self = this;
         var draggable_options = $.extend(true, {}, this.options.draggable, {
-            &#x2F;&#x2F; containment : this.$wrapper,
+            offset_left: this.options.widget_margins[0],
+            items: &#x27;.gs_w&#x27;,
             start: function(event, ui) {
+                self.$widgets.filter(&#x27;.player-revert&#x27;).removeClass(&#x27;player-revert&#x27;);
                 self.$player = $(this);
                 self.$helper = self.options.draggable.helper === &#x27;clone&#x27; ?
                     $(ui.helper) : self.$player;
+                self.helper = !self.$helper.is(self.$player);
 
                 self.on_start_drag.call(self, event, ui);
                 self.$el.trigger(&#x27;gridster:dragstart&#x27;);
             },
             stop: function(event, ui) {
-                self.on_stop_drag.call(self, ui);
+                self.on_stop_drag.call(self, event, ui);
                 self.$el.trigger(&#x27;gridster:dragstop&#x27;);
             },
-            drag: throttle(function(event, ui) {
+            drag: function(event, ui) {
                 self.on_drag.call(self, event, ui);
                 self.$el.trigger(&#x27;gridster:drag&#x27;);
-            }, 100, true)
+            }
           });
 
-        this.$widgets.draggable(draggable_options);
-
-      return this;
+        this.drag_api = this.$el.draggable(draggable_options).data(&#x27;draggable&#x27;);
+        return this;
     };
 
 
@@ -494,8 +501,10 @@
     *  See http:&#x2F;&#x2F;jqueryui.com&#x2F;demos&#x2F;draggable&#x2F; for more info.
     *&#x2F;
     fn.on_start_drag = function(event, ui) {
+
+        this.$helper.add(this.$player).add(this.$wrapper).addClass(&#x27;dragging&#x27;);
+
         this.$player.addClass(&#x27;player&#x27;);
-        this.$wrapper.addClass(&#x27;dragging&#x27;);
         this.player_grid_data = this.$player.coords().grid;
         this.placeholder_grid_data = $.extend({}, this.player_grid_data);
 
@@ -514,8 +523,9 @@
         this.last_cols = [];
         this.last_rows = [];
 
+
         &#x2F;&#x2F; see jquery.collision.js
-        this.drag_api = this.$helper.collision(
+        this.collision_api = this.$helper.collision(
             colliders, this.options.collision);
 
         this.$preview_holder = $(&#x27;&lt;li &#x2F;&gt;&#x27;, {
@@ -543,7 +553,11 @@
     *  See http:&#x2F;&#x2F;jqueryui.com&#x2F;demos&#x2F;draggable&#x2F; for more info.
     *&#x2F;
     fn.on_drag = function(event, ui) {
-        this.colliders_data = this.drag_api.get_closest_colliders();
+        var abs_offset = {
+            left: ui.position.left + this.baseX,
+            top: ui.position.top + this.baseY
+        }
+        this.colliders_data = this.collision_api.get_closest_colliders(abs_offset);
 
         this.on_overlapped_column_change(
             this.on_start_overlapping_column,
@@ -555,6 +569,13 @@
             this.on_stop_overlapping_row
         );
 
+        if (this.helper &amp;&amp; this.$player) {
+            this.$player.css({
+                &#x27;left&#x27;: ui.position.left,
+                &#x27;top&#x27;: ui.position.top
+            });
+        }
+
         if (this.options.draggable.drag) {
             this.options.draggable.drag.call(this, event, ui);
         }
@@ -569,7 +590,11 @@
     *  See http:&#x2F;&#x2F;jqueryui.com&#x2F;demos&#x2F;draggable&#x2F; for more info.
     *&#x2F;
     fn.on_stop_drag = function(event, ui) {
-        this.colliders_data = this.drag_api.get_closest_colliders();
+        this.$helper.add(this.$player).add(this.$wrapper).removeClass(&#x27;dragging&#x27;);
+
+        ui.position.left = ui.position.left + this.baseX;
+        ui.position.top = ui.position.top + this.baseY;
+        this.colliders_data = this.collision_api.get_closest_colliders(ui.position);
 
         this.on_overlapped_column_change(
             this.on_start_overlapping_column,
@@ -581,13 +606,14 @@
             this.on_stop_overlapping_row
         );
 
-        this.$player.add(this.$helper).attr({
+        this.$player
+        .addClass(&#x27;player-revert&#x27;).removeClass(&#x27;player&#x27;).attr({
             &#x27;data-col&#x27;: this.placeholder_grid_data.col,
             &#x27;data-row&#x27;: this.placeholder_grid_data.row
         }).css({
             &#x27;left&#x27;: &#x27;&#x27;,
             &#x27;top&#x27;: &#x27;&#x27;
-        }).removeClass(&#x27;player&#x27;);
+        });
 
         this.$changed = this.$changed.add(this.$player);
 
@@ -796,6 +822,26 @@
     };
 
 
+    &#x2F;**
+    * Sorts an Array of grid coords objects (representing the grid coords of
+    * each widget) placing first the empty cells upper left.
+    *
+    * @method sort_by_row_asc
+    * @param {Array} widgets Array of grid coords objects
+    * @return {Array} Returns the array sorted.
+    *&#x2F;
+    fn.sort_by_row_and_col_asc = function(widgets) {
+        widgets = widgets.sort(function(a, b){
+           if (a.row &gt; b.row || a.row == b.row &amp;&amp; a.col &gt; b.col) {
+               return 1;
+           }
+           return -1;
+        });
+
+        return widgets;
+    };
+
+
     &#x2F;**
     * Sorts an Array of grid coords objects by column (representing the grid
     * coords of each widget) in ascending way.
@@ -1061,12 +1107,21 @@
                 size_y: phgd.size_y,
                 size_x: phgd.size_x
             });
+
+        &#x2F;&#x2F;Prevents widgets go out of the grid
+        var right_col = (col + phgd.size_x - 1);
+        if (right_col &gt; this.cols) {
+            col = col - (right_col - col);
+        };
+
         var moved_down = this.placeholder_grid_data.row &lt; row;
         var changed_column = this.placeholder_grid_data.col !== col;
 
         this.placeholder_grid_data.col = col;
         this.placeholder_grid_data.row = row;
 
+
+
         this.cells_occupied_by_placeholder = this.get_cells_occupied(
             this.placeholder_grid_data);
 
@@ -1687,6 +1742,12 @@
         };
         var result = true;
 
+        &#x2F;&#x2F;Prevents widgets go out of the grid
+        var right_col = col + widget_grid_data.size_x - 1;
+        if (right_col &gt; this.cols) {
+            return false;
+        };
+
         this.for_each_cell_occupied(future_wd, function(tcol, trow){
             var $tw = this.is_widget(tcol, trow);
             if ($tw &amp;&amp; (!widget_grid_data.el || $tw.is($w))) {
@@ -1931,6 +1992,33 @@
     };
 
 
+
+    fn.get_widgets_from = function(col, row) {
+        var ga = this.gridmap;
+        var $widgets = $();
+
+        if (col) {
+            $widgets = $widgets.add(
+                this.$widgets.filter(function(){
+                    var tcol = $(this).attr(&#x27;data-col&#x27;);
+                    return (tcol == col || tcol &gt; col);
+                })
+            );
+        };
+
+        if (row) {
+            $widgets = $widgets.add(
+                this.$widgets.filter(function(){
+                    var trow = $(this).attr(&#x27;data-row&#x27;);
+                    return (trow == row || trow &gt; row);
+                })
+            );
+        };
+
+        return $widgets;
+    }
+
+
     &#x2F;**
     * Set the current height of the parent grid.
     *
@@ -1953,7 +2041,7 @@
     * @param {Number} cols Number of rows.
     * @return {Object} Returns the instance of the Gridster class.
     *&#x2F;
-    fn.generate_stylesheet = function(rows, cols) {
+    fn.generate_stylesheet = function(opts) {
         var styles = &#x27;&#x27;;
         var extra_cells = 10;
         var max_size_y = 6;
@@ -1961,28 +2049,47 @@
         var i;
         var rules;
 
+        opts || (opts = {});
+        opts.cols || (opts.cols = this.cols);
+        opts.rows || (opts.rows = this.rows);
+        opts.namespace || (opts.namespace = &#x27;&#x27;);
+        opts.widget_base_dimensions || (opts.widget_base_dimensions = this.options.widget_base_dimensions);
+        opts.widget_margins || (opts.widget_margins = this.options.widget_margins);
+
+        opts.min_widget_width = (opts.widget_margins[0] * 2) + opts.widget_base_dimensions[0];
+        opts.min_widget_height = (opts.widget_margins[1] * 2) + opts.widget_base_dimensions[1];
+
+        var serialized_opts = $.param(opts);
+        &#x2F;&#x2F; don&#x27;t duplicate stylesheets for the same configuration
+        if ($.inArray(serialized_opts, Gridster.generated_stylesheets) &gt;= 0) {
+            return false;
+        };
+
+        Gridster.generated_stylesheets.push(serialized_opts);
+
         &#x2F;* generate CSS styles for cols *&#x2F;
-        for (i = cols + extra_cells; i &gt;= 0; i--) {
-            styles += &#x27;[data-col=&quot;&#x27;+ (i + 1) +&#x27;&quot;] { left: &#x27; +
-                      (i * this.min_widget_width) +
+        for (i = opts.cols + extra_cells; i &gt;= 0; i--) {
+            styles += opts.namespace + &#x27; [data-col=&quot;&#x27;+ (i + 1) +&#x27;&quot;] { left: &#x27; +
+                      ((i * opts.widget_base_dimensions[0]) + (i *opts.widget_margins[0] ) + ((i+1) * opts.widget_margins[0])) +
                       &#x27;px;} &#x27;;
         }
 
         &#x2F;* generate CSS styles for rows *&#x2F;
-        for (i = rows + extra_cells; i &gt;= 0; i--) {
-            styles += &#x27;[data-row=&quot;&#x27; + (i + 1) + &#x27;&quot;] { top: &#x27; +
-                      (i * this.min_widget_height) + &#x27;px;} &#x27;;
+        for (i = opts.rows + extra_cells; i &gt;= 0; i--) {
+            styles += opts.namespace + &#x27; [data-row=&quot;&#x27; + (i + 1) + &#x27;&quot;] { top: &#x27; +
+                      ((i * opts.widget_base_dimensions[1]) + (i * opts.widget_margins[1]) + ((i+1) * opts.widget_margins[1]) ) +
+                      &#x27;px;} &#x27;;
         }
 
 
         for (var y = 1; y &lt; max_size_y; y++) {
-            styles += &#x27;[data-sizey=&quot;&#x27; + (y) + &#x27;&quot;] { height: &#x27; +
-                      (y * this.options.widget_base_dimensions[1] + (y-1)*(this.options.widget_margins[1]*2)) + &#x27;px;}&#x27;;
+            styles += opts.namespace + &#x27; [data-sizey=&quot;&#x27; + (y) + &#x27;&quot;] { height: &#x27; +
+                      (y * opts.widget_base_dimensions[1] + (y-1)*(opts.widget_margins[1]*2)) + &#x27;px;}&#x27;;
         }
 
         for (var x = 1; x &lt; max_size_x; x++) {
-            styles += &#x27;[data-sizex=&quot;&#x27; + (x) + &#x27;&quot;] { width: &#x27; +
-                      (x * this.options.widget_base_dimensions[0] + (x-1)*(this.options.widget_margins[0]*2)) + &#x27;px;}&#x27;;
+            styles += opts.namespace + &#x27; [data-sizex=&quot;&#x27; + (x) + &#x27;&quot;] { width: &#x27; +
+                    (x * opts.widget_base_dimensions[0] + (x-1)*(opts.widget_margins[0]*2)) + &#x27;px;}&#x27;;
         }
 
         return this.add_style_tag(styles);
@@ -2113,24 +2220,19 @@
         var min_cols = Math.max.apply(null, actual_cols);
         var min_rows = Math.max.apply(null, actual_rows);
 
-        cols = Math.max(min_cols, cols, this.options.min_cols);
-        rows = Math.max(min_rows, rows, this.options.min_rows);
+        this.cols = Math.max(min_cols, cols, this.options.min_cols);
+        this.rows = Math.max(min_rows, rows, this.options.min_rows);
 
-        &#x2F;&#x2F;this.support_grid_width = cols * this.min_widget_width;
-        &#x2F;&#x2F; this.support_grid_width = this.wrapper_width;
-
-        &#x2F;&#x2F; this.support_grid_height = rows * this.min_widget_height;
         this.baseX = ($(window).width() - aw) &#x2F; 2;
         this.baseY = this.$wrapper.offset().top;
 
-        &#x2F;&#x2F;this.baseX = 0;
         if (this.options.autogenerate_stylesheet) {
-            this.generate_stylesheet(rows, cols);
+            this.generate_stylesheet();
         }
 
         &#x2F;* more faux rows that needed are created so that there are cells
          * where drag beyond the limits *&#x2F;
-        return this.generate_faux_grid(rows, cols);
+        return this.generate_faux_grid(this.rows, this.cols);
     };
 
 
diff --git a/docs/index.html b/docs/index.html
index 3da554286f..b51bc488fc 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -46,6 +46,8 @@
             
                 <li><a href=".&#x2F;classes/Coords.html">Coords</a></li>
             
+                <li><a href=".&#x2F;classes/Draggable.html">Draggable</a></li>
+            
                 <li><a href=".&#x2F;classes/Gridster.html">Gridster</a></li>
             
             </ul>
diff --git a/grunt.js b/grunt.js
index f0b2f9d34f..aa31d6a54e 100644
--- a/grunt.js
+++ b/grunt.js
@@ -13,7 +13,7 @@ module.exports = function(grunt) {
     },
     concat: {
       dist_js: {
-        src: ['<banner:meta.banner>', '<file_strip_banner:src/jquery.coords.js>', '<file_strip_banner:src/jquery.collision.js>', '<file_strip_banner:src/<%= pkg.name %>.js>'],
+        src: ['<banner:meta.banner>', '<file_strip_banner:src/jquery.coords.js>', '<file_strip_banner:src/jquery.collision.js>', 'src/utils.js', '<file_strip_banner:src/jquery.draggable.js>', '<file_strip_banner:src/<%= pkg.name %>.js>'],
         dest: 'dist/<%= pkg.name %>.js'
       },
       dist_css: {
diff --git a/index.html b/index.html
index 2486a21e55..296a890a0c 100755
--- a/index.html
+++ b/index.html
@@ -56,7 +56,7 @@
 
         <div class="gridster">
           <ul>
-            <li data-row="1" data-col="1" data-sizex="1" data-sizey="1"></li>
+            <li data-row="1" data-col="1" data-sizex="2" data-sizey="1"></li>
             <li data-row="2" data-col="1" data-sizex="1" data-sizey="1"></li>
             <li data-row="3" data-col="1" data-sizex="1" data-sizey="1"></li>
 
@@ -85,10 +85,10 @@
 
             <article class="m_txt">
                 <h3 class="heading-l">Setup</h3>
-                <p>Nowadays griddable.js depends on jQuery and jQuery UI draggable, so you need to include this scripts in the head of your document.</p>
+                <p>Nowadays griddable.js depends on jQuery, so you need to include it in the head of your document.</p>
 
                 <h4 class="heading-m">Include dependencies</h4>
-                <p>Download the latest release at <a href="http://jquery.com/">jQuery</a> and <a href="http://jqueryui.com/">jQuery UI</a>.</p>
+                <p>Download the latest release at <a href="http://jquery.com/">jQuery</a>.</p>
 
                 <script src="https://gist.github.com/3129541.js?file=gridder.html"></script>
 
@@ -144,10 +144,15 @@
                         <li><a href="#extra_cols_opt">extra_cols</a></li>
                         <li><a href="#extra_rows_opt">extra_rows</a></li>
                         <li><a href="#autogenerate_stylesheet_opt">autogenerate_stylesheet</a></li>
+                        <li><a href="#avoid_overlapped_widgets_opt">avoid_overlapped_widgets</a></li>
 
-                        <li><a href="#on_overlap_start_opt">on_overlap_start</a></li>
-                        <li><a href="#on_overlap_opt">on_overlap</a></li>
-                        <li><a href="#on_overlap_stop_opt">on_overlap_stop</a></li>
+                        <li><a href="#draggable_start_opt">draggable.start</a></li>
+                        <li><a href="#draggable_start_opt">draggable.drag</a></li>
+                        <li><a href="#draggable_start_opt">draggable.stop</a></li>
+
+                        <li><a href="#on_overlap_start_opt">collision.on_overlap_start</a></li>
+                        <li><a href="#on_overlap_opt">collision.on_overlap</a></li>
+                        <li><a href="#on_overlap_stop_opt">collision.on_overlap_stop</a></li>
                     </ul>
                 </nav><br><br>
 
@@ -196,11 +201,20 @@
                     <h4 id="autogenerate_stylesheet_opt" class="heading-m">autogenerate_stylesheet: <em>true</em></h4>
                     <p>If true, all the CSS required to position all widgets in their respective columns and rows will be generated automatically and injected to the <code>&lt;head&gt;</code> of the document. You can set this to false, and write your own CSS targeting rows and cols via data-attributes like so: <code>[data-col="1"] { left: 10px; }</code></p>
 
+                    <h4 id="avoid_overlapped_widgets_opt" class="heading-m">avoid_overlapped_widgets: <em>true</em></h4>
+                    <p>Avoid that widgets loaded from the DOM can be overlapped. It is helpful if the positions were bad stored in the database or if there was any conflict.</p>
+
                     <h4 id="serialize_params_opt" class="heading-m">serialize_params: <em>function($w, wgd) { return { col: wgd.col, row: wgd.row } }</em></h4>
                     <p>Return the data you want for each widget in the serialize method. Two arguments are passed: `$w`: the jQuery wrapped HTMLElement, and `wgd`: the grid coords object (`col`, `row`, `size_x`, `size_y`).</p>
 
-                    <h4 id="draggable_opt" class="heading-m">draggable: <em>{}</em></h4>
-                    <p>The configuration object of the jQuery UI Draggable Plugin. See <a href="http://jqueryui.com/demos/draggable/">http://jqueryui.com/demos/draggable/</a> for more information.</p>
+                    <h4 id="draggable_start_opt" class="heading-m">draggable.start: <em>function(event, ui){}</em></h4>
+                    <p>Executes a function when dragging starts.</p>
+
+                    <h4 id="draggable_drag_opt" class="heading-m">draggable.drag: <em>function(event, ui){}</em></h4>
+                    <p>Executes a function when the mouse is moved during the dragging.</p>
+
+                    <h4 id="draggable_stop_opt" class="heading-m">draggable.stop: <em>function(event, ui){}</em></h4>
+                    <p>Executes a function when dragging stops.</p>
 
                     <h4 id="on_overlap_start_opt" class="heading-m">collision.on_overlap_start: <em>function(collider_data) { }</em></h4>
                     <p>Executes a function first time a widget overlaps with a "faux" grid cell.</p>
@@ -292,7 +306,7 @@
             </header>
 
             <article class="m_txt">
-                <p>Reminds that gridster.js depends on jQuery and jQuery UI draggable. Download the latest release at <a href="http://jquery.com/">jQuery</a> and <a href="http://jqueryui.com/">jQuery UI</a>.
+                <p>Reminds that gridster.js depends on jQuery. Download the latest release at <a href="http://jquery.com/">jQuery</a>.
                 </p>
 
                 <h3 class="heading-l">gridster.<u>js</u></h3>
@@ -354,7 +368,6 @@
 </footer>
 
 <script type="text/javascript" src="libs/jquery/jquery.js"></script>
-<script type="text/javascript" src="libs/jquery-ui/jquery-ui.js"></script>
 
 <script src="dist/jquery.gridster.js" type="text/javascript" charset="utf-8"></script>
 
@@ -367,10 +380,7 @@
         widget_margins: [10, 10],
         widget_base_dimensions: [140, 140],
         min_cols: 6,
-        min_rows: 10,
-        draggable: {
-            helper: "clone"
-        }
+        min_rows: 10
     }).data('gridster');
 
   });