diff --git a/bower.json b/bower.json
index 14aa752..3b786b7 100644
--- a/bower.json
+++ b/bower.json
@@ -6,7 +6,10 @@
     "Pavel Reznikov <pashka.reznikov@gmail.com>"
   ],
   "description": "gridstack.js is a jQuery plugin for widget layout",
-  "main": "dist/gridstack.min.js",
+  "main": [
+    "dist/gridstack.js",
+    "dist/gridstack.css"
+  ],
   "moduleType": [
     "amd"
   ],
diff --git a/demo/float.html b/demo/float.html
index 12281ac..638ec2a 100644
--- a/demo/float.html
+++ b/demo/float.html
@@ -12,13 +12,13 @@
 
     <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
     <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css"/>
-    <link rel="stylesheet" href="../src/gridstack.css"/>
+    <link rel="stylesheet" href="../dist/gridstack.css"/>
 
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.0/jquery-ui.js"></script>
     <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>
-    <script src="../src/gridstack.js"></script>
+    <script src="../dist/gridstack.js"></script>
 
     <style type="text/css">
         .grid-stack {
diff --git a/demo/knockout.html b/demo/knockout.html
index 4ef54dd..2a7a360 100644
--- a/demo/knockout.html
+++ b/demo/knockout.html
@@ -12,14 +12,14 @@
 
     <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
     <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css"/>
-    <link rel="stylesheet" href="../src/gridstack.css"/>
+    <link rel="stylesheet" href="../dist/gridstack.css"/>
 
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.0/jquery-ui.js"></script>
     <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
-    <script src="../src/gridstack.js"></script>
+    <script src="../dist/gridstack.js"></script>
 
     <style type="text/css">
         .grid-stack {
diff --git a/demo/knockout2.html b/demo/knockout2.html
index 1e8e09b..af558ec 100644
--- a/demo/knockout2.html
+++ b/demo/knockout2.html
@@ -12,14 +12,14 @@
 
     <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
     <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css"/>
-    <link rel="stylesheet" href="../src/gridstack.css"/>
+    <link rel="stylesheet" href="../dist/gridstack.css"/>
 
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.0/jquery-ui.js"></script>
     <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
-    <script src="../src/gridstack.js"></script>
+    <script src="../dist/gridstack.js"></script>
 
     <style type="text/css">
         .grid-stack {
diff --git a/demo/nested.html b/demo/nested.html
index 6446b0e..0fff23f 100644
--- a/demo/nested.html
+++ b/demo/nested.html
@@ -12,13 +12,13 @@
 
     <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
     <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css"/>
-    <link rel="stylesheet" href="../src/gridstack.css"/>
+    <link rel="stylesheet" href="../dist/gridstack.css"/>
 
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.0/jquery-ui.js"></script>
     <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>
-    <script src="../src/gridstack.js"></script>
+    <script src="../dist/gridstack.js"></script>
 
     <style type="text/css">
         .grid-stack {
diff --git a/demo/serialization.html b/demo/serialization.html
index 01e2c56..aca9d32 100644
--- a/demo/serialization.html
+++ b/demo/serialization.html
@@ -12,13 +12,13 @@
 
     <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
     <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css"/>
-    <link rel="stylesheet" href="../src/gridstack.css"/>
+    <link rel="stylesheet" href="../dist/gridstack.css"/>
 
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.0/jquery-ui.js"></script>
     <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>
-    <script src="../src/gridstack.js"></script>
+    <script src="../dist/gridstack.js"></script>
 
     <style type="text/css">
         .grid-stack {
diff --git a/src/gridstack.css b/dist/gridstack.css
similarity index 100%
rename from src/gridstack.css
rename to dist/gridstack.css
diff --git a/dist/gridstack.js b/dist/gridstack.js
new file mode 100644
index 0000000..88f9604
--- /dev/null
+++ b/dist/gridstack.js
@@ -0,0 +1,865 @@
+//     gridstack.js 0.2.3-dev
+//     http://troolee.github.io/gridstack.js/
+//     (c) 2014-2015 Pavel Reznikov
+//     gridstack.js may be freely distributed under the MIT license.
+
+(function (factory) {
+    if (typeof define === 'function' && define.amd) {
+        define(['jquery', 'lodash'], factory);
+    }
+    else {
+        factory(jQuery, _);
+    }
+})(function ($, _) {
+
+    var scope = window;
+
+    var Utils = {
+        is_intercepted: function (a, b) {
+            return !(a.x + a.width <= b.x || b.x + b.width <= a.x || a.y + a.height <= b.y || b.y + b.height <= a.y);
+        },
+
+        sort: function (nodes, dir, width) {
+            width = width || _.chain(nodes).map(function (node) { return node.x + node.width; }).max().value();
+            dir = dir != -1 ? 1 : -1;
+            return _.sortBy(nodes, function (n) { return dir * (n.x + n.y * width); });
+        },
+
+        create_stylesheet: function (id) {
+            var style = document.createElement("style");
+            style.setAttribute("type", "text/css");
+            style.setAttribute("data-gs-id", id);
+            if (style.styleSheet) {
+                style.styleSheet.cssText = "";
+            }
+            else {
+                style.appendChild(document.createTextNode(""));
+            }
+            document.getElementsByTagName('head')[0].appendChild(style);
+            return style.sheet;
+        },
+
+        insert_css_rule: function (sheet, selector, rules, index) {
+            if(typeof sheet.insertRule === 'function') {
+                sheet.insertRule(selector + "{" + rules + "}", index);
+            }
+            else if(typeof sheet.addRule === 'function') {
+                sheet.addRule(selector, rules, index);
+            }
+        },
+
+        toBool: function (v) {
+            if (typeof v == 'boolean')
+                return v;
+            if (typeof v == 'string') {
+                v = v.toLowerCase();
+                return !(v == '' || v == 'no' || v == 'false' || v == '0');
+            }
+            return Boolean(v);
+        }
+    };
+
+    var id_seq = 0;
+
+    var GridStackEngine = function (width, onchange, float, height, items) {
+        this.width = width;
+        this.float = float || false;
+        this.height = height || 0;
+
+        this.nodes = items || [];
+        this.onchange = onchange || function () {};
+
+        this._update_counter = 0;
+        this._float = this.float;
+    };
+
+    GridStackEngine.prototype.batch_update = function () {
+        this._update_counter = 1;
+        this.float = true;
+    };
+
+    GridStackEngine.prototype.commit = function () {
+        this._update_counter = 0;
+        if (this._update_counter == 0) {
+            this.float = this._float;
+            this._pack_nodes();
+            this._notify();
+        }
+    };
+
+    GridStackEngine.prototype._fix_collisions = function (node) {
+        this._sort_nodes(-1);
+
+        var nn = node, has_locked = Boolean(_.find(this.nodes, function (n) { return n.locked }));
+        if (!this.float && !has_locked) {
+            nn = {x: 0, y: node.y, width: this.width, height: node.height};
+        }
+
+        while (true) {
+            var collision_node = _.find(this.nodes, function (n) {
+                return n != node && Utils.is_intercepted(n, nn);
+            }, this);
+            if (typeof collision_node == 'undefined') {
+                return;
+            }
+            this.move_node(collision_node, collision_node.x, node.y + node.height,
+                collision_node.width, collision_node.height, true);
+        }
+    };
+
+    GridStackEngine.prototype.is_area_empty = function (x, y, width, height) {
+        var nn = {x: x || 0, y: y || 0, width: width || 1, height: height || 1};
+        var collision_node = _.find(this.nodes, function (n) {
+            return Utils.is_intercepted(n, nn);
+        }, this);
+        return collision_node == null;
+    };
+
+    GridStackEngine.prototype._sort_nodes = function (dir) {
+        this.nodes = Utils.sort(this.nodes, dir, this.width);
+    };
+
+    GridStackEngine.prototype._pack_nodes = function () {
+        this._sort_nodes();
+
+        if (this.float) {
+            _.each(this.nodes, function (n, i) {
+                if (n._updating || typeof n._orig_y == 'undefined' || n.y == n._orig_y)
+                    return;
+
+                var new_y = n.y;
+                while (new_y >= n._orig_y) {
+                    var collision_node = _.chain(this.nodes)
+                        .find(function (bn) {
+                            return n != bn && Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
+                        })
+                        .value();
+
+                    if (!collision_node) {
+                        n._dirty = true;
+                        n.y = new_y;
+                    }
+                    --new_y;
+                }
+            }, this);
+        }
+        else {
+            _.each(this.nodes, function (n, i) {
+                if (n.locked)
+                    return;
+                while (n.y > 0) {
+                    var new_y = n.y - 1;
+                    var can_be_moved = i == 0;
+
+                    if (i > 0) {
+                        var collision_node = _.chain(this.nodes)
+                            .take(i)
+                            .find(function (bn) {
+                                return Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
+                            })
+                            .value();
+                        can_be_moved = typeof collision_node == 'undefined';
+                    }
+
+                    if (!can_be_moved) {
+                        break;
+                    }
+                    n._dirty = n.y != new_y;
+                    n.y = new_y;
+                }
+            }, this);
+        }
+    };
+
+    GridStackEngine.prototype._prepare_node = function (node, resizing) {
+        node = _.defaults(node || {}, {width: 1, height: 1, x: 0, y: 0 });
+
+        node.x = parseInt('' + node.x);
+        node.y = parseInt('' + node.y);
+        node.width = parseInt('' + node.width);
+        node.height = parseInt('' + node.height);
+        node.auto_position = node.auto_position || false;
+        node.no_resize = node.no_resize || false;
+        node.no_move = node.no_move || false;
+
+        if (node.width > this.width) {
+            node.width = this.width;
+        }
+        else if (node.width < 1) {
+            node.width = 1;
+        }
+
+        if (node.height < 1) {
+            node.height = 1;
+        }
+
+        if (node.x < 0) {
+            node.x = 0;
+        }
+
+        if (node.x + node.width > this.width) {
+            if (resizing) {
+                node.width = this.width - node.x;
+            }
+            else {
+                node.x = this.width - node.width;
+            }
+        }
+
+        if (node.y < 0) {
+            node.y = 0;
+        }
+
+        return node;
+    };
+
+    GridStackEngine.prototype._notify = function () {
+        if (this._update_counter) {
+            return;
+        }
+        var deleted_nodes = Array.prototype.slice.call(arguments, 1).concat(this.get_dirty_nodes());
+        deleted_nodes = deleted_nodes.concat(this.get_dirty_nodes());
+        this.onchange(deleted_nodes);
+    };
+
+    GridStackEngine.prototype.clean_nodes = function () {
+        _.each(this.nodes, function (n) {n._dirty = false });
+    };
+
+    GridStackEngine.prototype.get_dirty_nodes = function () {
+        return _.filter(this.nodes, function (n) { return n._dirty; });
+    };
+
+    GridStackEngine.prototype.add_node = function(node) {
+        node = this._prepare_node(node);
+
+        if (typeof node.max_width != 'undefined') node.width = Math.min(node.width, node.max_width);
+        if (typeof node.max_height != 'undefined') node.height = Math.min(node.height, node.max_height);
+        if (typeof node.min_width != 'undefined') node.width = Math.max(node.width, node.min_width);
+        if (typeof node.min_height != 'undefined') node.height = Math.max(node.height, node.min_height);
+
+        node._id = ++id_seq;
+        node._dirty = true;
+
+        if (node.auto_position) {
+            this._sort_nodes();
+
+            for (var i = 0; ; ++i) {
+                var x = i % this.width, y = Math.floor(i / this.width);
+                if (x + node.width > this.width) {
+                    continue;
+                }
+                if (!_.find(this.nodes, function (n) {
+                    return Utils.is_intercepted({x: x, y: y, width: node.width, height: node.height}, n);
+                })) {
+                    node.x = x;
+                    node.y = y;
+                    break;
+                }
+            }
+        }
+
+        this.nodes.push(node);
+
+        this._fix_collisions(node);
+        this._pack_nodes();
+        this._notify();
+        return node;
+    };
+
+    GridStackEngine.prototype.remove_node = function (node) {
+        node._id = null;
+        this.nodes = _.without(this.nodes, node);
+        this._pack_nodes();
+        this._notify(node);
+    };
+
+    GridStackEngine.prototype.can_move_node = function (node, x, y, width, height) {
+        var has_locked = Boolean(_.find(this.nodes, function (n) { return n.locked }));
+
+        if (!this.height && !has_locked)
+            return true;
+
+        var cloned_node;
+        var clone = new GridStackEngine(
+            this.width,
+            null,
+            this.float,
+            0,
+            _.map(this.nodes, function (n) { if (n == node) { cloned_node = $.extend({}, n); return cloned_node; } return $.extend({}, n) }));
+
+        clone.move_node(cloned_node, x, y, width, height);
+
+        var res = true;
+
+        if (has_locked)
+            res &= !Boolean(_.find(clone.nodes, function (n) { return n != cloned_node && Boolean(n.locked) && Boolean(n._dirty); }));
+        if (this.height)
+            res &= clone.get_grid_height() <= this.height;
+
+        return res;
+    };
+
+    GridStackEngine.prototype.can_be_placed_with_respect_to_height = function (node) {
+        if (!this.height)
+            return true;
+
+        var clone = new GridStackEngine(
+            this.width,
+            null,
+            this.float,
+            0,
+            _.map(this.nodes, function (n) { return $.extend({}, n) }));
+        clone.add_node(node);
+        return clone.get_grid_height() <= this.height;
+    };
+
+    GridStackEngine.prototype.move_node = function (node, x, y, width, height, no_pack) {
+        if (typeof x != 'number') x = node.x;
+        if (typeof y != 'number') y = node.y;
+        if (typeof width != 'number') width = node.width;
+        if (typeof height != 'number') height = node.height;
+
+        if (typeof node.max_width != 'undefined') width = Math.min(width, node.max_width);
+        if (typeof node.max_height != 'undefined') height = Math.min(height, node.max_height);
+        if (typeof node.min_width != 'undefined') width = Math.max(width, node.min_width);
+        if (typeof node.min_height != 'undefined') height = Math.max(height, node.min_height);
+
+        if (node.x == x && node.y == y && node.width == width && node.height == height) {
+            return node;
+        }
+
+        var resizing = node.width != width;
+        node._dirty = true;
+
+        node.x = x;
+        node.y = y;
+        node.width = width;
+        node.height = height;
+
+        node = this._prepare_node(node, resizing);
+
+        this._fix_collisions(node);
+        if (!no_pack) {
+            this._pack_nodes();
+            this._notify();
+        }
+        return node;
+    };
+
+    GridStackEngine.prototype.get_grid_height = function () {
+        return _.reduce(this.nodes, function (memo, n) { return Math.max(memo, n.y + n.height); }, 0);
+    };
+
+    GridStackEngine.prototype.begin_update = function (node) {
+        _.each(this.nodes, function (n) {
+            n._orig_y = n.y;
+        });
+        node._updating = true;
+    };
+
+    GridStackEngine.prototype.end_update = function () {
+        _.each(this.nodes, function (n) {
+            n._orig_y = n.y;
+        });
+        var n = _.find(this.nodes, function (n) { return n._updating; });
+        if (n) {
+            n._updating = false;
+        }
+    };
+
+    var GridStack = function (el, opts) {
+        var self = this, one_column_mode;
+
+        this.container = $(el);
+
+        opts.item_class = opts.item_class || 'grid-stack-item';
+        var is_nested = this.container.closest('.' + opts.item_class).size() > 0;
+
+        this.opts = _.defaults(opts || {}, {
+            width: parseInt(this.container.attr('data-gs-width')) || 12,
+            height: parseInt(this.container.attr('data-gs-height')) || 0,
+            item_class: 'grid-stack-item',
+            placeholder_class: 'grid-stack-placeholder',
+            handle: '.grid-stack-item-content',
+            cell_height: 60,
+            vertical_margin: 20,
+            auto: true,
+            min_width: 768,
+            float: false,
+            _class: 'grid-stack-' + (Math.random() * 10000).toFixed(0),
+            animate: Boolean(this.container.attr('data-gs-animate')) || false,
+            always_show_resize_handle: opts.always_show_resize_handle || false,
+            resizable: _.defaults(opts.resizable || {}, {
+                autoHide: !(opts.always_show_resize_handle || false),
+                handles: 'se'
+            }),
+            draggable: _.defaults(opts.draggable || {}, {
+                handle: '.grid-stack-item-content',
+                scroll: false,
+                appendTo: 'body'
+            })
+        });
+        this.opts.is_nested = is_nested;
+
+        this.container.addClass(this.opts._class);
+        if (is_nested) {
+            this.container.addClass('grid-stack-nested');
+        }
+
+        this._init_styles();
+
+        this.grid = new GridStackEngine(this.opts.width, function (nodes) {
+            var max_height = 0;
+            _.each(nodes, function (n) {
+                if (n._id == null) {
+                    n.el.remove();
+                }
+                else {
+                    n.el
+                        .attr('data-gs-x', n.x)
+                        .attr('data-gs-y', n.y)
+                        .attr('data-gs-width', n.width)
+                        .attr('data-gs-height', n.height);
+                    max_height = Math.max(max_height, n.y + n.height);
+                }
+            });
+            self._update_styles(max_height + 10);
+        }, this.opts.float, this.opts.height);
+
+        if (this.opts.auto) {
+            var elements = [];
+            this.container.children('.' + this.opts.item_class).each(function (index, el) {
+                el = $(el);
+                elements.push({
+                    el: el,
+                    i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * parseInt(el.attr('data-gs-width'))
+                });
+            });
+            _.chain(elements).sortBy(function (x) { return x.i; }).each(function (i) {
+                self._prepare_element(i.el);
+            }).value();
+        }
+
+        this.set_animation(this.opts.animate);
+
+        this.placeholder = $('<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '"><div class="placeholder-content" /></div>').hide();
+        this.container.append(this.placeholder);
+        this.container.height((this.grid.get_grid_height()) * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
+
+        var on_resize_handler = function () {
+            if (self._is_one_column_mode()) {
+                if (one_column_mode)
+                    return;
+
+                one_column_mode = true;
+
+                self.grid._sort_nodes();
+                _.each(self.grid.nodes, function (node) {
+                    self.container.append(node.el);
+
+                    if (!node.no_move) {
+                        node.el.draggable('disable');
+                    }
+                    if (!node.no_resize) {
+                        node.el.resizable('disable');
+                    }
+                });
+            }
+            else {
+                if (!one_column_mode)
+                    return;
+
+                one_column_mode = false;
+
+                _.each(self.grid.nodes, function (node) {
+                    if (!node.no_move) {
+                        node.el.draggable('enable');
+                    }
+                    if (!node.no_resize) {
+                        node.el.resizable('enable');
+                    }
+                });
+            }
+        };
+
+        $(window).resize(on_resize_handler);
+        on_resize_handler();
+    };
+
+    GridStack.prototype._init_styles = function () {
+        if (this._styles_id) {
+            $('[data-gs-id="' + this._styles_id + '"]').remove();
+        }
+        this._styles_id = 'gridstack-style-' + (Math.random() * 100000).toFixed();
+        this._styles = Utils.create_stylesheet(this._styles_id);
+        if (this._styles != null)
+            this._styles._max = 0;
+    };
+
+    GridStack.prototype._update_styles = function (max_height) {
+        if (this._styles == null) {
+            return;
+        }
+
+        var prefix = '.' + this.opts._class + ' .' + this.opts.item_class;
+
+        if (typeof max_height == 'undefined') {
+            max_height = this._styles._max;
+            this._init_styles();
+            this._update_container_height();
+        }
+
+        if (this._styles._max == 0) {
+            Utils.insert_css_rule(this._styles, prefix, 'min-height: ' + (this.opts.cell_height) + 'px;', 0);
+        }
+
+        if (max_height > this._styles._max) {
+            for (var i = this._styles._max; i < max_height; ++i) {
+                Utils.insert_css_rule(this._styles,
+                    prefix + '[data-gs-height="' + (i + 1) + '"]',
+                    'height: ' + (this.opts.cell_height * (i + 1) + this.opts.vertical_margin * i) + 'px;',
+                    i
+                );
+                Utils.insert_css_rule(this._styles,
+                    prefix + '[data-gs-min-height="' + (i + 1) + '"]',
+                    'min-height: ' + (this.opts.cell_height * (i + 1) + this.opts.vertical_margin * i) + 'px;',
+                    i
+                );
+                Utils.insert_css_rule(this._styles,
+                    prefix + '[data-gs-max-height="' + (i + 1) + '"]',
+                    'max-height: ' + (this.opts.cell_height * (i + 1) + this.opts.vertical_margin * i) + 'px;',
+                    i
+                );
+                Utils.insert_css_rule(this._styles,
+                    prefix + '[data-gs-y="' + i + '"]',
+                    'top: ' + (this.opts.cell_height * i + this.opts.vertical_margin * i) + 'px;',
+                    i
+                );
+            }
+            this._styles._max = max_height;
+        }
+    };
+
+    GridStack.prototype._update_container_height = function () {
+        if (this.grid._update_counter) {
+            return;
+        }
+        this.container.height(this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
+    };
+
+    GridStack.prototype._is_one_column_mode = function () {
+        return $(window).width() <= this.opts.min_width;
+    };
+
+    GridStack.prototype._prepare_element = function (el) {
+        var self = this;
+        el = $(el);
+
+        el.addClass(this.opts.item_class);
+
+        var node = self.grid.add_node({
+            x: el.attr('data-gs-x'),
+            y: el.attr('data-gs-y'),
+            width: el.attr('data-gs-width'),
+            height: el.attr('data-gs-height'),
+            max_width: el.attr('data-gs-max-width'),
+            min_width: el.attr('data-gs-min-width'),
+            max_height: el.attr('data-gs-max-height'),
+            min_height: el.attr('data-gs-min-height'),
+            auto_position: Utils.toBool(el.attr('data-gs-auto-position')),
+            no_resize: Utils.toBool(el.attr('data-gs-no-resize')),
+            no_move: Utils.toBool(el.attr('data-gs-no-move')),
+            locked: Utils.toBool(el.attr('data-gs-locked')),
+            el: el
+        });
+        el.data('_gridstack_node', node);
+
+        var cell_width, cell_height;
+
+        var on_start_moving = function (event, ui) {
+            var o = $(this);
+            self.grid.clean_nodes();
+            self.grid.begin_update(node);
+            cell_width = Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
+            cell_height = self.opts.cell_height + self.opts.vertical_margin;
+            self.placeholder
+                .attr('data-gs-x', o.attr('data-gs-x'))
+                .attr('data-gs-y', o.attr('data-gs-y'))
+                .attr('data-gs-width', o.attr('data-gs-width'))
+                .attr('data-gs-height', o.attr('data-gs-height'))
+                .show();
+            node.el = self.placeholder;
+        };
+
+        var on_end_moving = function (event, ui) {
+            var o = $(this);
+            node.el = o;
+            self.placeholder.hide();
+            o
+                .attr('data-gs-x', node.x)
+                .attr('data-gs-y', node.y)
+                .attr('data-gs-width', node.width)
+                .attr('data-gs-height', node.height)
+                .removeAttr('style');
+            self._update_container_height();
+            self.container.trigger('change', [self.grid.get_dirty_nodes()]);
+
+            self.grid.end_update();
+        };
+
+        el.draggable(_.extend(this.opts.draggable, {
+            start: on_start_moving,
+            stop: on_end_moving,
+            drag: function (event, ui) {
+                var x = Math.round(ui.position.left / cell_width),
+                    y = Math.floor((ui.position.top + cell_height/2) / cell_height);
+                if (!self.grid.can_move_node(node, x, y, node.width, node.height)) {
+                    return;
+                }
+                self.grid.move_node(node, x, y);
+                self._update_container_height();
+            },
+            containment: this.opts.is_nested ? this.container.parent() : null
+        })).resizable(_.extend(this.opts.resizable, {
+            start: on_start_moving,
+            stop: on_end_moving,
+            resize: function (event, ui) {
+                var x = Math.round(ui.position.left / cell_width),
+                    y = Math.floor((ui.position.top + cell_height/2) / cell_height),
+                    width = Math.round(ui.size.width / cell_width),
+                    height = Math.round(ui.size.height / cell_height);
+                if (!self.grid.can_move_node(node, x, y, width, height)) {
+                    return;
+                }
+                self.grid.move_node(node, x, y, width, height);
+                self._update_container_height();
+            }
+        }));
+
+        if (node.no_move || this._is_one_column_mode()) {
+            el.draggable('disable');
+        }
+
+        if (node.no_resize || this._is_one_column_mode()) {
+            el.resizable('disable');
+        }
+
+        el.attr('data-gs-locked', node.locked ? 'yes' : null);
+    };
+
+    GridStack.prototype.set_animation = function (enable) {
+        if (enable) {
+            this.container.addClass('grid-stack-animate');
+        }
+        else {
+            this.container.removeClass('grid-stack-animate');
+        }
+    };
+
+    GridStack.prototype.add_widget = function (el, x, y, width, height, auto_position) {
+        el = $(el);
+        if (typeof x != 'undefined') el.attr('data-gs-x', x);
+        if (typeof y != 'undefined') el.attr('data-gs-y', y);
+        if (typeof width != 'undefined') el.attr('data-gs-width', width);
+        if (typeof height != 'undefined') el.attr('data-gs-height', height);
+        if (typeof auto_position != 'undefined') el.attr('data-gs-auto-position', auto_position ? 'yes' : null);
+        this.container.append(el);
+        this._prepare_element(el);
+        this._update_container_height();
+
+        return el;
+    };
+
+    GridStack.prototype.will_it_fit = function (x, y, width, height, auto_position) {
+        var node = {x: x, y: y, width: width, height: height, auto_position: auto_position};
+        return this.grid.can_be_placed_with_respect_to_height(node);
+    };
+
+    GridStack.prototype.remove_widget = function (el, detach_node) {
+        detach_node = typeof detach_node === 'undefined' ? true : detach_node;
+        el = $(el);
+        var node = el.data('_gridstack_node');
+        this.grid.remove_node(node);
+        el.removeData('_gridstack_node');
+        this._update_container_height();
+        if (detach_node)
+            el.remove();
+    };
+
+    GridStack.prototype.remove_all = function (detach_node) {
+        _.each(this.grid.nodes, function (node) {
+            this.remove_widget(node.el, detach_node);
+        }, this);
+        this.grid.nodes = [];
+        this._update_container_height();
+    };
+
+    GridStack.prototype.resizable = function (el, val) {
+        el = $(el);
+        el.each(function (index, el) {
+            el = $(el);
+            var node = el.data('_gridstack_node');
+            if (typeof node == 'undefined' || node == null) {
+                return;
+            }
+
+            node.no_resize = !(val || false);
+            if (node.no_resize) {
+                el.resizable('disable');
+            }
+            else {
+                el.resizable('enable');
+            }
+        });
+        return this;
+    };
+
+    GridStack.prototype.movable = function (el, val) {
+        el = $(el);
+        el.each(function (index, el) {
+            el = $(el);
+            var node = el.data('_gridstack_node');
+            if (typeof node == 'undefined' || node == null) {
+                return;
+            }
+
+            node.no_move = !(val || false);
+            if (node.no_move) {
+                el.draggable('disable');
+            }
+            else {
+                el.draggable('enable');
+            }
+        });
+        return this;
+    };
+
+    GridStack.prototype.disable = function () {
+        this.movable(this.container.children('.' + this.opts.item_class), false);
+        this.resizable(this.container.children('.' + this.opts.item_class), false);
+    };
+
+    GridStack.prototype.enable = function () {
+        this.movable(this.container.children('.' + this.opts.item_class), true);
+        this.resizable(this.container.children('.' + this.opts.item_class), true);
+    };
+
+    GridStack.prototype.locked = function (el, val) {
+        el = $(el);
+        el.each(function (index, el) {
+            el = $(el);
+            var node = el.data('_gridstack_node');
+            if (typeof node == 'undefined' || node == null) {
+                return;
+            }
+
+            node.locked = (val || false);
+            el.attr('data-gs-locked', node.locked ? 'yes' : null);
+        });
+        return this;
+    };
+
+    GridStack.prototype._update_element = function (el, callback) {
+        el = $(el).first();
+        var node = el.data('_gridstack_node');
+        if (typeof node == 'undefined' || node == null) {
+            return;
+        }
+
+        var self = this;
+
+        self.grid.clean_nodes();
+        self.grid.begin_update(node);
+
+        callback.call(this, el, node);
+
+        self._update_container_height();
+        self.container.trigger('change', [self.grid.get_dirty_nodes()]);
+
+        self.grid.end_update();
+    };
+
+    GridStack.prototype.resize = function (el, width, height) {
+        this._update_element(el, function (el, node) {
+            width = (width != null && typeof width != 'undefined') ? width : node.width;
+            height = (height != null && typeof height != 'undefined') ? height : node.height;
+
+            this.grid.move_node(node, node.x, node.y, width, height);
+        });
+    };
+
+    GridStack.prototype.move = function (el, x, y) {
+        this._update_element(el, function (el, node) {
+            x = (x != null && typeof x != 'undefined') ? x : node.x;
+            y = (y != null && typeof y != 'undefined') ? y : node.y;
+
+            this.grid.move_node(node, x, y, node.width, node.height);
+        });
+    };
+
+    GridStack.prototype.update = function (el, x, y, width, height) {
+        this._update_element(el, function (el, node) {
+            x = (x != null && typeof x != 'undefined') ? x : node.x;
+            y = (y != null && typeof y != 'undefined') ? y : node.y;
+            width = (width != null && typeof width != 'undefined') ? width : node.width;
+            height = (height != null && typeof height != 'undefined') ? height : node.height;
+
+            this.grid.move_node(node, x, y, width, height);
+        });
+    };
+
+    GridStack.prototype.cell_height = function (val) {
+        if (typeof val == 'undefined') {
+            return this.opts.cell_height;
+        }
+        val = parseInt(val);
+        if (val == this.opts.cell_height)
+            return;
+        this.opts.cell_height = val || this.opts.cell_height;
+        this._update_styles();
+    };
+
+    GridStack.prototype.cell_width = function () {
+        var o = this.container.children('.' + this.opts.item_class).first();
+        return Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
+    };
+
+    GridStack.prototype.get_cell_from_pixel = function(position) {
+        var containerPos = this.container.position();
+        var relativeLeft = position.left - containerPos.left;
+        var relativeTop = position.top - containerPos.top;
+
+        var column_width = Math.floor(this.container.width() / this.opts.width);
+        var row_height = this.opts.cell_height + this.opts.vertical_margin;
+
+        return {x: Math.floor(relativeLeft / column_width), y: Math.floor(relativeTop / row_height)};
+    };
+
+    GridStack.prototype.batch_update = function () {
+        this.grid.batch_update();
+    };
+
+    GridStack.prototype.commit = function () {
+        this.grid.commit();
+        this._update_container_height()
+    };
+
+    GridStack.prototype.is_area_empty = function (x, y, width, height) {
+        return this.grid.is_area_empty(x, y, width, height);
+    };
+
+    scope.GridStackUI = GridStack;
+
+    scope.GridStackUI.Utils = Utils;
+
+    $.fn.gridstack = function (opts) {
+        return this.each(function () {
+            if (!$(this).data('gridstack')) {
+                $(this).data('gridstack', new GridStack(this, opts));
+            }
+        });
+    };
+
+    return scope.GridStackUI;
+});