add gridstack.js
This commit is contained in:
Pavel Reznikov
parent
4576db237c
commit
f11993b229
298
gridstack.js
Normal file
298
gridstack.js
Normal file
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(function (scope, _) {
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var Utils = {
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is_intercepted: function (a, b) {
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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);
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}
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};
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var id_seq = 0;
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var GridStackEngine = function (width, onchange) {
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this.width = width;
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this.nodes = [];
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this.onchange = onchange || function () {};
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};
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GridStackEngine.prototype._fix_collisions = function (node) {
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this.nodes = _.sortBy(this.nodes, function (n) { return -(n.x + n.y * this.width); }, this);
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while (true) {
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var collision_node = _.find(this.nodes, function (n) {
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return n != node && Utils.is_intercepted(n, node);
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}, this);
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if (typeof collision_node == 'undefined') {
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return;
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}
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this.move_node(collision_node, collision_node.x, node.y + node.height,
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collision_node.width, collision_node.height, true);
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}
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};
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GridStackEngine.prototype._pack_nodes = function () {
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this.nodes = _.sortBy(this.nodes, function (n) { return n.x + n.y * this.width; }, this);
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_.each(this.nodes, function (n, i) {
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while (n.y > 0) {
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var new_y = n.y - 1;
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var can_be_moved = i == 0;
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if (i > 0) {
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var collision_node = _.chain(this.nodes)
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.first(i)
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.find(function (bn) {
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return Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
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})
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.value();
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can_be_moved = typeof collision_node == 'undefined';
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}
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if (!can_be_moved) {
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break;
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}
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n.y = new_y;
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}
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}, this);
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};
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GridStackEngine.prototype._prepare_node = function (node, moving) {
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node = _.defaults(node || {}, {width: 1, height: 1, x: 0, y: 0 });
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node.x = parseInt('' + node.x);
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node.y = parseInt('' + node.y);
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node.width = parseInt('' + node.width);
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node.height = parseInt('' + node.height);
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if (node.width > this.width) {
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node.width = this.width;
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}
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else if (node.width < 1) {
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node.width = 1;
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}
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if (node.height < 1) {
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node.height = 1;
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}
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if (node.x < 0) {
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node.x = 0;
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}
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if (node.x + node.width > this.width) {
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if (moving) {
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node.x = this.width - node.width;
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}
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else {
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node.width = this.width - node.x;
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}
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}
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if (node.y < 0) {
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node.y = 0;
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}
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return node;
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};
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GridStackEngine.prototype._notify = function () {
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this.onchange(this.nodes);
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};
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GridStackEngine.prototype.add_node = function(node) {
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node = this._prepare_node(node);
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if (typeof node.max_width != 'undefined') node.width = Math.min(node.width, node.max_width);
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if (typeof node.max_height != 'undefined') node.height = Math.min(node.height, node.max_height);
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if (typeof node.min_width != 'undefined') node.width = Math.max(node.width, node.min_width);
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if (typeof node.min_height != 'undefined') node.height = Math.max(node.height, node.min_height);
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node._id = ++id_seq;
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this.nodes.push(node);
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this._fix_collisions(node);
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this._pack_nodes();
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this._notify();
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return node;
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};
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GridStackEngine.prototype.remove_node = function (node) {
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node._id = null;
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this.nodes = _.without(this.nodes, node);
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this._pack_nodes();
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this._notify(node);
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};
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GridStackEngine.prototype.move_node = function (node, x, y, width, height, no_pack) {
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if (typeof x == 'undefined') x = node.x;
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if (typeof y == 'undefined') y = node.y;
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if (typeof width == 'undefined') width = node.width;
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if (typeof height == 'undefined') height = node.height;
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if (typeof node.max_width != 'undefined') width = Math.min(width, node.max_width);
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if (typeof node.max_height != 'undefined') height = Math.min(height, node.max_height);
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if (typeof node.min_width != 'undefined') width = Math.max(width, node.min_width);
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if (typeof node.min_height != 'undefined') height = Math.max(height, node.min_height);
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if (node.x == x && node.y == y && node.width == width && node.height == height) {
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return node;
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}
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var moving = node.x != x;
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node.x = x;
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node.y = y;
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node.width = width;
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node.height = height;
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node = this._prepare_node(node, moving);
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this._fix_collisions(node);
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if (!no_pack) {
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this._pack_nodes();
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this._notify();
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}
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return node;
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};
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GridStackEngine.prototype.get_grid_height = function () {
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return _.reduce(this.nodes, function (memo, n) { return Math.max(memo, n.y + n.height); }, 0);
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};
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var GridStack = function (el, opts) {
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var self = this;
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this.container = $(el);
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this.opts = _.defaults(opts || {}, {
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width: 12,
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item_class: 'grid-stack-item',
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placeholder_class: 'grid-stack-placeholder',
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handle: '.grid-stack-item-content',
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cell_height: 60,
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vertical_margin: 20
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});
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this.grid = new GridStackEngine(this.opts.width, function (nodes) {
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_.each(nodes, function (n) {
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n.el
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.attr('data-gs-x', n.x)
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.attr('data-gs-y', n.y)
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.attr('data-gs-width', n.width)
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.attr('data-gs-height', n.height);
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});
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});
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this.container.find('.' + this.opts.item_class).each(function (index, el) {
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self._prepare_element(el);
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});
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this.placeholder = $('<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '"><div class="placeholder-content" /></div>').hide();
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this.container.append(this.placeholder);
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this.container.height((this.grid.get_grid_height()) * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
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};
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GridStack.prototype._update_container_height = function () {
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this.container.height(this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
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};
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GridStack.prototype._prepare_element = function (el) {
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var self = this;
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el = $(el);
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var node = self.grid.add_node({
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x: el.attr('data-gs-x'),
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y: el.attr('data-gs-y'),
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width: el.attr('data-gs-width'),
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height: el.attr('data-gs-height'),
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max_width: el.attr('data-gs-max-width'),
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min_width: el.attr('data-gs-min-width'),
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max_height: el.attr('data-gs-max-height'),
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min_height: el.attr('data-gs-min-height'),
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el: el
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});
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el.data('_gridstack_node', node);
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var cell_width, cell_height = this.opts.cell_height + this.opts.vertical_margin / 2;
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var on_start_moving = function (event, ui) {
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var o = $(this);
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cell_width = Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
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self.placeholder
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.attr('data-gs-x', o.attr('data-gs-x'))
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.attr('data-gs-y', o.attr('data-gs-y'))
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.attr('data-gs-width', o.attr('data-gs-width'))
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.attr('data-gs-height', o.attr('data-gs-height'))
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.show();
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node.el = self.placeholder;
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};
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var on_end_moving = function (event, ui) {
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var o = $(this);
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node.el = o;
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self.placeholder.hide();
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o
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.attr('data-gs-x', node.x)
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.attr('data-gs-y', node.y)
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.attr('data-gs-width', node.width)
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.attr('data-gs-height', node.height)
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.removeAttr('style');
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self._update_container_height();
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};
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el.draggable({
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handle: this.opts.handle,
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scroll: true,
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appendTo: 'body',
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start: on_start_moving,
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stop: on_end_moving,
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drag: function (event, ui) {
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var x = Math.round(ui.position.left / cell_width),
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y = Math.floor(ui.position.top / cell_height);
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self.grid.move_node(node, x, y);
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self._update_container_height();
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}
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}).resizable({
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autoHide: true,
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handles: 'se',
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minHeight: this.opts.cell_height - 10,
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minWidth: 70,
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start: on_start_moving,
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stop: on_end_moving,
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resize: function (event, ui) {
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var width = Math.round(ui.size.width / cell_width),
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height = Math.round(ui.size.height / cell_height);
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self.grid.move_node(node, node.x, node.y, width, height);
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self._update_container_height();
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}
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});
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};
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GridStack.prototype.add_widget = function (el, x, y, width, height) {
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el = $(el);
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if (typeof x != 'undefined') el.attr('data-gs-x', x);
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if (typeof y != 'undefined') el.attr('data-gs-y', y);
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if (typeof width != 'undefined') el.attr('data-gs-width', width);
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if (typeof height != 'undefined') el.attr('data-gs-height', height);
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this.container.append(el);
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this._prepare_element(el);
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};
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GridStack.prototype.remove_widget = function (el) {
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var node = $(el).data('_gridstack_node');
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this.grid.remove_node(node);
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el.remove();
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};
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scope.GridStackUI = GridStack;
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$.fn.gridstack = function (opts) {
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return this.each(function () {
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if (!$(this).data('_gridstack')) {
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$(this).data('_gridstack', new GridStack(this, opts));
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}
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});
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};
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})(window, _);
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