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larscwallin/dashboard.html

Created September 19, 2012 12:17
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dashboard.html
<!doctype html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title></title>
<link rel="stylesheet" type="text/css" href="jquery.gridster.css">
<style type="text/css">
body {
text-align: center;
}
* div {
margin: 0px;
padding: 0px;
}
.widget-grid {
display: inline-block;
border: 1px solid red;
}
.widget-grid-item {
list-style-type: none;
background-image: url(sunset.jpg);
background-repeat: no-repeat;
background-position: center;
background-size: cover;
}
.widget-grid-item .title{
position: absolute;
bottom: 0px;
left: 0px;
opacity: 0.7;
background-color: #000;
color: #fff;
padding: 5px;
font-family: sans-serif;
}
</style>
</head>
<body>
<header role="header">
</header>
<div role="main">
<section class="demo">
<div class="gridster">
<ul class="widget-grid">
<li class="widget-grid-item" data-row="1" data-col="1" data-sizex="1" data-sizey="1">
<div class="title">Test</div>
</li>
<li class="widget-grid-item" data-row="1" data-col="2" data-sizex="1" data-sizey="1"></li>
<li class="widget-grid-item" data-row="2" data-col="1" data-sizex="1" data-sizey="1"></li>
<li class="widget-grid-item" data-row="2" data-col="2" data-sizex="1" data-sizey="1"></li>
<li class="widget-grid-item" data-row="3" data-col="1" data-sizex="1" data-sizey="1"></li>
<li class="widget-grid-item" data-row="3" data-col="2" data-sizex="1" data-sizey="1"></li>
</ul>
</div>
</section>
</div>
<footer role="footer">
</footer>
<script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.8.0.min.js" type="text/javascript"></script>
<script src="jquery.gridster.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
var gridster;
$(function(){
gridster = $(".gridster ul").gridster({
widget_margins: [5, 5],
widget_base_dimensions: [150, 150],
min_cols: 2
}).data('gridster');
});
</script>
</body>
</html>
Raw
jquery.gridster.css
/*! gridster.js - v0.1.0 - 2012-09-12
* http://gridster.net/
* Copyright (c) 2012 ducksboard; Licensed MIT */.gridster{position:relative}.gridster>*{margin:0 auto;-webkit-transition:height .4s;-moz-transition:height .4s;-o-transition:height .4s;-ms-transition:height .4s;transition:height .4s}.gridster .gs_w{z-index:2;position:absolute}.ready .gs_w:not(.preview-holder){-webkit-transition:opacity .3s,left .3s,top .3s;-moz-transition:opacity .3s,left .3s,top .3s;-o-transition:opacity .3s,left .3s,top .3s;transition:opacity .3s,left .3s,top .3s}.ready .gs_w:not(.preview-holder){-webkit-transition:opacity .3s,left .3s,top .3s,width .3s,height .3s;-moz-transition:opacity .3s,left .3s,top .3s,width .3s,height .3s;-o-transition:opacity .3s,left .3s,top .3s,width .3s,height .3s;transition:opacity .3s,left .3s,top .3s,width .3s,height .3s}.gridster .preview-holder{z-index:1;position:absolute;background-color:#fff;border-color:#fff;opacity:.3}.gridster .player-revert{z-index:10!important;-webkit-transition:left .3s,top .3s!important;-moz-transition:left .3s,top .3s!important;-o-transition:left .3s,top .3s!important;transition:left .3s,top .3s!important}.gridster .dragging{z-index:10!important;-webkit-transition:all 0s!important;-moz-transition:all 0s!important;-o-transition:all 0s!important;transition:all 0s!important}
Raw
jquery.gridster.js
/*! gridster.js - v0.1.0 - 2012-09-12
* http://gridster.net/
* Copyright (c) 2012 ducksboard; Licensed MIT */
;(function($, window, document, undefined){
/**
* Creates objects with coordinates (x1, y1, x2, y2, cx, cy, width, height)
* to simulate DOM elements on the screen.
* Coords is used by Gridster to create a faux grid with any DOM element can
* collide.
*
* @class Coords
* @param {HTMLElement|Object} obj The jQuery HTMLElement or a object with: left,
* top, width and height properties.
* @return {Object} Coords instance.
* @constructor
*/
function Coords(obj) {
if (obj[0] && $.isPlainObject(obj[0])) {
this.data = obj[0];
}else {
this.el = obj;
}
this.isCoords = true;
this.coords = {};
this.init();
return this;
}
var fn = Coords.prototype;
fn.init = function(){
this.set();
this.original_coords = this.get();
};
fn.set = function(update, not_update_offsets) {
var el = this.el;
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;
this.coords.x1 = d.left;
this.coords.y1 = d.top;
this.coords.x2 = d.left + d.width;
this.coords.y2 = d.top + d.height;
this.coords.cx = d.left + (d.width / 2);
this.coords.cy = d.top + (d.height / 2);
this.coords.width = d.width;
this.coords.height = d.height;
this.coords.el = el || false ;
return this;
};
fn.update = function(data){
if (!data && !this.el) {
return this;
}
if (data) {
var new_data = $.extend({}, this.data, data);
this.data = new_data;
return this.set(true, true);
}
this.set(true);
return this;
};
fn.get = function(){
return this.coords;
};
//jQuery adapter
$.fn.coords = function() {
if (this.data('coords') ) {
return this.data('coords');
}
var ins = new Coords(this, arguments[0]);
this.data('coords', ins);
return ins;
};
}(jQuery, window, document));
;(function($, window, document, undefined){
var defaults = {
colliders_context: document.body
// ,on_overlap: function(collider_data){},
// on_overlap_start : function(collider_data){},
// on_overlap_stop : function(collider_data){}
};
/**
* Detects collisions between a DOM element against other DOM elements or
* Coords objects.
*
* @class Collision
* @uses Coords
* @param {HTMLElement} el The jQuery wrapped HTMLElement.
* @param {HTMLElement|Array} colliders Can be a jQuery collection
* of HTMLElements or an Array of Coords instances.
* @param {Object} [options] An Object with all options you want to
* overwrite:
* @param {Function} [options.on_overlap_start] Executes a function the first
* time each `collider ` is overlapped.
* @param {Function} [options.on_overlap_stop] Executes a function when a
* `collider` is no longer collided.
* @param {Function} [options.on_overlap] Executes a function when the
* mouse is moved during the collision.
* @return {Object} Collision instance.
* @constructor
*/
function Collision(el, colliders, options) {
this.options = $.extend(defaults, options);
this.$element = el;
this.last_colliders = [];
this.last_colliders_coords = [];
if (typeof colliders === 'string' || colliders instanceof jQuery) {
this.$colliders = $(colliders,
this.options.colliders_context).not(this.$element);
}else{
this.colliders = $(colliders);
}
this.init();
}
var fn = Collision.prototype;
fn.init = function() {
this.find_collisions();
};
fn.overlaps = function(a, b) {
var x = false;
var y = false;
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)
) { x = true; }
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)
) { y = true; }
return (x && y);
};
fn.detect_overlapping_region = function(a, b){
var regionX = '';
var regionY = '';
if (a.y1 > b.cy && a.y1 < b.y2) { regionX = 'N'; }
if (a.y2 > b.y1 && a.y2 < b.cy) { regionX = 'S'; }
if (a.x1 > b.cx && a.x1 < b.x2) { regionY = 'W'; }
if (a.x2 > b.x1 && a.x2 < b.cx) { regionY = 'E'; }
return (regionX + regionY) || 'C';
};
fn.calculate_overlapped_area_coords = function(a, b){
var x1 = Math.max(a.x1, b.x1);
var y1 = Math.max(a.y1, b.y1);
var x2 = Math.min(a.x2, b.x2);
var y2 = Math.min(a.y2, b.y2);
return $({
left: x1,
top: y1,
width : (x2 - x1),
height: (y2 - y1)
}).coords().get();
};
fn.calculate_overlapped_area = function(coords){
return (coords.width * coords.height);
};
fn.manage_colliders_start_stop = function(new_colliders_coords, start_callback, stop_callback){
var last = this.last_colliders_coords;
for (var i = 0, il = last.length; i < il; i++) {
if ($.inArray(last[i], new_colliders_coords) === -1) {
start_callback.call(this, last[i]);
}
}
for (var j = 0, jl = new_colliders_coords.length; j < jl; j++) {
if ($.inArray(new_colliders_coords[j], last) === -1) {
stop_callback.call(this, new_colliders_coords[j]);
}
}
};
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 $collider_coords_ins = ($collider.isCoords) ?
$collider : $collider.coords();
var collider_coords = $collider_coords_ins.get();
var overlaps = self.overlaps(player_coords, collider_coords);
if (!overlaps) {
continue;
}
var region = self.detect_overlapping_region(
player_coords, collider_coords);
//todo: make this an option
if (region === 'C'){
var area_coords = self.calculate_overlapped_area_coords(
player_coords, collider_coords);
var area = self.calculate_overlapped_area(area_coords);
var collider_data = {
area: area,
area_coords : area_coords,
region: region,
coords: collider_coords,
player_coords: player_coords,
el: $collider
};
if (self.options.on_overlap) {
self.options.on_overlap.call(this, collider_data);
}
colliders_coords.push($collider_coords_ins);
colliders_data.push(collider_data);
}
}
if (self.options.on_overlap_stop || self.options.on_overlap_start) {
this.manage_colliders_start_stop(colliders_coords,
self.options.on_overlap_stop, self.options.on_overlap_start);
}
this.last_colliders_coords = colliders_coords;
return colliders_data;
};
fn.get_closest_colliders = function(player_data_coords){
var colliders = this.find_collisions(player_data_coords);
colliders.sort(function(a, b) {
/* if colliders are being overlapped by the "C" (center) region,
* we have to set a lower index in the array to which they are placed
* above in the grid. */
if (a.region === 'C' && b.region === 'C') {
if (a.coords.y1 < b.coords.y1 || a.coords.x1 < b.coords.x1) {
return - 1;
}else{
return 1;
}
}
if (a.area < b.area) {
return 1;
}
return 1;
});
return colliders;
};
//jQuery adapter
$.fn.collision = function(collider, options) {
return new Collision( this, collider, options );
};
}(jQuery, window, document));
;(function(window, undefined) {
/* Debounce and throttle functions taken from underscore.js */
window.debounce = function(func, wait, immediate) {
var timeout;
return function() {
var context = this, args = arguments;
var later = function() {
timeout = null;
if (!immediate) func.apply(context, args);
};
if (immediate && !timeout) func.apply(context, args);
clearTimeout(timeout);
timeout = setTimeout(later, wait);
};
};
window.throttle = function(func, wait) {
var context, args, timeout, throttling, more, result;
var whenDone = debounce(
function(){ more = throttling = false; }, wait);
return function() {
context = this; args = arguments;
var later = function() {
timeout = null;
if (more) func.apply(context, args);
whenDone();
};
if (!timeout) timeout = setTimeout(later, wait);
if (throttling) {
more = true;
} else {
result = func.apply(context, args);
}
whenDone();
throttling = true;
return result;
};
};
})(window);
;(function($, window, document, undefined){
var defaults = {
items: '.gs_w',
distance: 1,
limit: true,
offset_left: 0,
autoscroll: true
// ,drag: function(e){},
// start : function(e, ui){},
// stop : function(e){}
};
var $window = $(window);
var isTouch = !!('ontouchstart' in window);
var pointer_events = {
start: isTouch ? 'touchstart' : 'mousedown.draggable',
move: isTouch ? 'touchmove' : 'mousemove.draggable',
end: isTouch ? 'touchend' : 'mouseup.draggable'
};
/**
* Basic drag implementation for DOM elements inside a container.
* Provide start/stop/drag callbacks.
*
* @class Draggable
* @param {HTMLElement} el The HTMLelement that contains all the widgets
* to be dragged.
* @param {Object} [options] An Object with all options you want to
* overwrite:
* @param {HTMLElement|String} [options.items] Define who will
* be the draggable items. Can be a CSS Selector String or a
* collection of HTMLElements.
* @param {Number} [options.distance] Distance in pixels after mousedown
* the mouse must move before dragging should start.
* @param {Boolean} [options.limit] Constrains dragging to the width of
* the container
* @param {offset_left} [options.offset_left] Offset added to the item
* that is being dragged.
* @param {Number} [options.drag] Executes a callback when the mouse is
* moved during the dragging.
* @param {Number} [options.start] Executes a callback when the drag
* starts.
* @param {Number} [options.stop] Executes a callback when the drag stops.
* @return {Object} Returns `el`.
* @constructor
*/
function Draggable(el, options) {
this.options = $.extend({}, defaults, options);
this.$body = $(document.body);
this.$container = $(el);
this.$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.calculate_positions();
this.$container.css('position', 'relative');
this.enable();
$(window).bind('resize',
throttle($.proxy(this.calculate_positions, this), 200));
};
fn.get_actual_pos = function($el) {
var pos = $el.position();
return pos;
};
fn.get_mouse_pos = function(e) {
if (isTouch) {
var oe = e.originalEvent;
e = oe.touches.length ? oe.touches[0] : oe.changedTouches[0];
};
return {
left: e.clientX,
top: e.clientY
};
};
fn.get_offset = function(e) {
e.preventDefault();
var mouse_actual_pos = this.get_mouse_pos(e);
var diff_x = Math.round(
mouse_actual_pos.left - this.mouse_init_pos.left);
var diff_y = Math.round(mouse_actual_pos.top - this.mouse_init_pos.top);
var left = Math.round(this.el_init_offset.left + diff_x - this.baseX);
var top = Math.round(
this.el_init_offset.top + diff_y - this.baseY + this.scrollOffset);
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,
mouse_left: mouse_actual_pos.left,
mouse_top: mouse_actual_pos.top
};
};
fn.manage_scroll = function(offset) {
/* scroll document */
var nextScrollTop;
var scrollTop = $window.scrollTop();
var min_window_y = scrollTop;
var max_window_y = min_window_y + this.window_height;
var mouse_down_zone = max_window_y - 50;
var mouse_up_zone = min_window_y + 50;
var abs_mouse_left = offset.mouse_left;
var abs_mouse_top = min_window_y + offset.mouse_top;
var max_player_y = (this.doc_height - this.window_height +
this.player_height);
if (abs_mouse_top >= mouse_down_zone) {
nextScrollTop = scrollTop + 30;
if (nextScrollTop < max_player_y) {
$window.scrollTop(nextScrollTop);
this.scrollOffset = this.scrollOffset + 30;
}
};
if (abs_mouse_top <= mouse_up_zone) {
nextScrollTop = scrollTop - 30;
if (nextScrollTop > 0) {
$window.scrollTop(nextScrollTop);
this.scrollOffset = this.scrollOffset - 30;
}
};
}
fn.calculate_positions = function(e) {
this.window_height = $window.height();
}
fn.drag_handler = function(e) {
var node = e.target.nodeName;
if (e.which !== 1 && !isTouch) {
return;
}
if (node === 'INPUT' || node === 'TEXTAREA' || node === 'SELECT' ||
node === 'BUTTON') {
return;
};
var self = this;
var first = true;
this.$player = $(e.currentTarget);
this.el_init_pos = this.get_actual_pos(this.$player);
this.mouse_init_pos = this.get_mouse_pos(e);
this.offsetY = this.mouse_init_pos.top - this.el_init_pos.top;
this.$body.on(pointer_events.move, function(mme){
var mouse_actual_pos = self.get_mouse_pos(mme);
var diff_x = Math.abs(
mouse_actual_pos.left - self.mouse_init_pos.left);
var diff_y = Math.abs(
mouse_actual_pos.top - self.mouse_init_pos.top);
if (!(diff_x > self.options.distance ||
diff_y > self.options.distance)
) {
return false;
}
if (first) {
first = false;
self.on_dragstart.call(self, mme);
return false;
}
if (self.is_dragging == true) {
self.on_dragmove.call(self, mme);
}
return false;
});
return false;
};
fn.on_dragstart = function(e) {
e.preventDefault();
this.drag_start = true;
this.is_dragging = true;
var offset = this.$container.offset();
this.baseX = Math.round(offset.left);
this.baseY = Math.round(offset.top);
this.doc_height = $(document).height();
if (this.options.helper === 'clone') {
this.$helper = this.$player.clone()
.appendTo(this.$container).addClass('helper');
this.helper = true;
}else{
this.helper = false;
}
this.scrollOffset = 0;
this.el_init_offset = this.$player.offset();
this.player_width = this.$player.width();
this.player_height = this.$player.height();
this.player_max_left = (this.$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.$player
});
}
return false;
};
fn.on_dragmove = function(e) {
var offset = this.get_offset(e);
this.options.autoscroll && this.manage_scroll(offset);
(this.helper ? this.$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.on_select_start = function(e) {
return false;
}
fn.enable = function(){
this.$container.on('selectstart', this.on_select_start);
this.$container.on(pointer_events.start, this.options.items, $.proxy(
this.drag_handler, this));
this.$body.on(pointer_events.end, $.proxy(function(e) {
this.is_dragging = false;
this.$body.off(pointer_events.move);
if (this.drag_start) {
this.on_dragstop(e);
}
}, this));
};
fn.disable = function(){
this.$container.off(pointer_events.start);
this.$body.off(pointer_events.end);
this.$container.off('selectstart', this.on_select_start);
};
fn.destroy = function(){
this.disable();
$.removeData(this.$container, 'drag');
};
//jQuery adapter
$.fn.drag = function ( options ) {
return this.each(function () {
if (!$.data(this, 'drag')) {
$.data(this, 'drag', new Draggable( this, options ));
}
});
};
}(jQuery, window, document));
;(function($, window, document, undefined) {
var defaults = {
namespace: '',
widget_selector: '> li',
widget_margins: [10, 10],
widget_base_dimensions: [400, 225],
extra_rows: 0,
extra_cols: 0,
min_cols: 1,
min_rows: 15,
max_size_x: 6,
autogenerate_stylesheet: true,
avoid_overlapped_widgets: true,
serialize_params: function($w, wgd) {
return {
col: wgd.col,
row: wgd.row,
size_x: wgd.size_x,
size_y: wgd.size_y
};
},
collision: {},
draggable: {
distance: 4
}
};
/**
* @class Gridster
* @uses Draggable
* @uses Collision
* @param {HTMLElement} el The HTMLelement that contains all the widgets.
* @param {Object} [options] An Object with all options you want to
* overwrite:
* @param {HTMLElement|String} [options.widget_selector] Define who will
* be the draggable widgets. Can be a CSS Selector String or a
* collection of HTMLElements
* @param {Array} [options.widget_margins] Margin between widgets.
* The first index for the horizontal margin (left, right) and
* the second for the vertical margin (top, bottom).
* @param {Array} [options.widget_base_dimensions] Base widget dimensions
* in pixels. The first index for the width and the second for the
* height.
* @param {Number} [options.extra_cols] Add more columns in addition to
* those that have been calculated.
* @param {Number} [options.extra_rows] Add more rows in addition to
* those that have been calculated.
* @param {Number} [options.min_cols] The minimum required columns.
* @param {Number} [options.min_rows] The minimum required rows.
* @param {Number} [options.max_size_x] The maximum number of columns
* that a widget can span.
* @param {Boolean} [options.autogenerate_stylesheet] If true, all the
* CSS required to position all widgets in their respective columns
* and rows will be generated automatically and injected to the
* `<head>` of the document. You can set this to false, and write
* your own CSS targeting rows and cols via data-attributes like so:
* `[data-col="1"] { left: 10px; }`
* @param {Boolean} [options.avoid_overlapped_widgets] Avoid that widgets loaded
* from the DOM can be overlapped. It is helpful if the positions were
* bad stored in the database or if there was any conflict.
* @param {Function} [options.serialize_params] Return the data you want
* for each widget in the serialization. Two arguments are passed:
* `$w`: the jQuery wrapped HTMLElement, and `wgd`: the grid
* coords object (`col`, `row`, `size_x`, `size_y`).
* @param {Object} [options.collision] An Object with all options for
* Collision class you want to overwrite. See Collision docs for
* more info.
* @param {Object} [options.draggable] An Object with all options for
* Draggable class you want to overwrite. See Draggable docs for more
* info.
*
* @constructor
*/
function Gridster(el, options) {
this.options = $.extend(true, defaults, options);
this.$el = $(el);
this.$wrapper = this.$el.parent();
this.$widgets = $(this.options.widget_selector, this.$el).addClass('gs_w');
this.widgets = [];
this.$changed = $([]);
this.wrapper_width = this.$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();
}
Gridster.generated_stylesheets = [];
var fn = Gridster.prototype;
fn.init = function() {
this.generate_grid_and_stylesheet();
this.get_widgets_from_DOM();
this.set_dom_grid_height();
this.$wrapper.addClass('ready');
this.draggable();
$(window).bind(
'resize', throttle($.proxy(this.recalculate_faux_grid, this), 200));
};
/**
* Disables dragging.
*
* @method disable
* @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;
};
/**
* Enables 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.
*
* @method add_widget
* @param {String|HTMLElement} html The string representing the HTML of the widget
* or the HTMLElement.
* @param {Number} [size_x] The nº of rows the widget occupies horizontally.
* @param {Number} [size_y] The nº of columns the widget occupies vertically.
* @param {Number} [col] The column the widget should start in.
* @param {Number} [row] The row the widget should start in.
* @return {HTMLElement} Returns the jQuery wrapped HTMLElement representing.
* the widget that was just created.
*/
fn.add_widget = function(html, size_x, size_y, col, row) {
var pos;
size_x || (size_x = 1);
size_y || (size_y = 1);
if (!col & !row) {
pos = this.next_position(size_x, size_y);
}else{
pos = {
col: col,
row: row
};
this.empty_cells(col, row, size_x, size_y);
}
var $w = $(html).attr({
'data-col': pos.col,
'data-row': pos.row,
'data-sizex' : size_x,
'data-sizey' : size_y
}).addClass('gs_w').appendTo(this.$el).hide();
this.$widgets = this.$widgets.add($w);
this.register_widget($w);
this.add_faux_rows(pos.size_y);
this.set_dom_grid_height();
return $w.fadeIn();
};
/**
* Change the size of a widget.
*
* @method resize_widget
* @param {HTMLElement} $widget The jQuery wrapped HTMLElement
* representing the widget.
* @param {Number} size_x The number of columns that will occupy the widget.
* @param {Number} size_y The number of rows that will occupy the widget.
* @return {HTMLElement} Returns $widget.
*/
fn.resize_widget = function($widget, size_x, size_y) {
var wgd = $widget.coords().grid;
size_x || (size_x = wgd.size_x);
size_y || (size_y = wgd.size_y);
if (size_x > this.cols) {
size_x = this.cols;
};
var old_cells_occupied = this.get_cells_occupied(wgd);
var old_size_x = wgd.size_x;
var old_size_y = wgd.size_y;
var old_col = wgd.col;
var new_col = old_col;
var wider = size_x > old_size_x;
var taller = size_y > old_size_y;
if (old_col + size_x - 1 > this.cols) {
var diff = old_col + (size_x - 1) - this.cols;
var c = old_col - diff;
new_col = Math.max(1, c);
};
var new_grid_data = {
col: new_col,
row: wgd.row,
size_x: size_x,
size_y: size_y
};
var new_cells_occupied = this.get_cells_occupied(new_grid_data);
var empty_cols = [];
$.each(old_cells_occupied.cols, function(i, col) {
if ($.inArray(col, new_cells_occupied.cols) === -1) {
empty_cols.push(col);
};
});
var occupied_cols = [];
$.each(new_cells_occupied.cols, function(i, col) {
if ($.inArray(col, old_cells_occupied.cols) === -1) {
occupied_cols.push(col);
}
});
var empty_rows = [];
$.each(old_cells_occupied.rows, function(i, row) {
if ($.inArray(row, new_cells_occupied.rows) === -1) {
empty_rows.push(row);
};
});
var occupied_rows = [];
$.each(new_cells_occupied.rows, function(i, row) {
if ($.inArray(row, old_cells_occupied.rows) === -1) {
occupied_rows.push(row);
};
});
this.remove_from_gridmap(wgd);
if (occupied_cols.length) {
var cols_to_empty = [
new_col, wgd.row, size_x, Math.min(old_size_y, size_y), $widget
];
this.empty_cells.apply(this, cols_to_empty);
};
if (occupied_rows.length) {
var rows_to_empty = [new_col, wgd.row, size_x, size_y, $widget];
this.empty_cells.apply(this, rows_to_empty);
};
wgd.col = new_col;
wgd.size_x = size_x;
wgd.size_y = size_y;
this.add_to_gridmap(new_grid_data, $widget);
//update coords instance attributes
$widget.data('coords').update({
width: (size_x * this.options.widget_base_dimensions[0] +
((size_x - 1) * this.options.widget_margins[0]) * 2),
height: (size_y * this.options.widget_base_dimensions[1] +
((size_y - 1) * this.options.widget_margins[1]) * 2)
});
if (size_y > old_size_y) {
this.add_faux_rows(size_y - old_size_y);
};
$widget.attr({
'data-col': new_col,
'data-sizex': size_x,
'data-sizey': size_y
});
if (empty_cols.length) {
var cols_to_remove_holes = [
empty_cols[0], wgd.row,
empty_cols.length,
Math.min(old_size_y, size_y),
$widget
];
this.remove_empty_cells.apply(this, cols_to_remove_holes);
}
if (empty_rows.length) {
var rows_to_remove_holes = [
new_col, wgd.row, size_x, size_y, $widget
];
this.remove_empty_cells.apply(this, rows_to_remove_holes);
}
return $widget;
};
/**
* Move down widgets in cells represented by the arguments col, row, size_x,
* size_y
*
* @method empty_cells
* @param {Number} col The column where the group of cells begin.
* @param {Number} row The row where the group of cells begin.
* @param {Number} size_x The number of columns that the group of cells
* occupy.
* @param {Number} size_y The number of rows that the group of cells
* occupy.
* @param {HTMLElement} $exclude Exclude widgets from being moved.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.empty_cells = function(col, row, size_x, size_y, $exclude) {
var $nexts = this.widgets_below({
col: col,
row: row - size_y,
size_x: size_x,
size_y: size_y
});
$nexts.not($exclude).each($.proxy(function(i, w) {
var wgd = $(w).coords().grid;
if (!(wgd.row <= (row + size_y - 1))) { return; };
var diff = (row + size_y) - wgd.row;
this.move_widget_down($(w), diff);
}, this));
this.set_dom_grid_height();
return this;
};
/**
* Move up widgets below cells represented by the arguments col, row, size_x,
* size_y.
*
* @method remove_empty_cells
* @param {Number} col The column where the group of cells begin.
* @param {Number} row The row where the group of cells begin.
* @param {Number} size_x The number of columns that the group of cells
* occupy.
* @param {Number} size_y The number of rows that the group of cells
* occupy.
* @param {HTMLElement} $exclude Exclude widgets from being moved.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.remove_empty_cells = function(col, row, size_x, size_y, exclude) {
var $nexts = this.widgets_below({
col: col,
row: row,
size_x: size_x,
size_y: size_y
});
$nexts.not(exclude).each($.proxy(function(i, widget) {
this.move_widget_up( $(widget), size_y );
}, this));
this.set_dom_grid_height();
return this;
}
/**
* Get the most left column below to add a new widget.
*
* @method next_position
* @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 {Object} Returns a grid coords object representing the future
* widget coords.
*/
fn.next_position = function(size_x, size_y) {
size_x || (size_x = 1);
size_y || (size_y = 1);
var ga = this.gridmap;
var cols_l = ga.length;
var valid_pos = [];
for (var c = 1; c < cols_l; c++) {
var rows_l = ga[c].length;
for (var r = 1; r <= rows_l; r++) {
var can_move_to = this.can_move_to({
size_x: size_x,
size_y: size_y
}, c, r);
if (can_move_to) {
valid_pos.push({
col: c,
row: r,
size_y: size_y,
size_x: size_x
});
}
}
}
if (valid_pos.length) {
return this.sort_by_row_and_col_asc(valid_pos)[0];
}
return false;
};
/**
* Remove a widget from the grid.
*
* @method remove_widget
* @param {HTMLElement} el The jQuery wrapped HTMLElement you want to remove.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.remove_widget = function(el, callback) {
var $el = el instanceof jQuery ? el : $(el);
var wgd = $el.coords().grid;
this.cells_occupied_by_placeholder = {};
this.$widgets = this.$widgets.not($el);
var $nexts = this.widgets_below($el);
this.remove_from_gridmap(wgd);
$el.fadeOut($.proxy(function() {
$el.remove();
$nexts.each($.proxy(function(i, widget) {
this.move_widget_up( $(widget), wgd.size_y );
}, this));
this.set_dom_grid_height();
if (callback) {
callback.call(this, el);
}
}, this));
};
/**
* Returns a serialized array of the widgets in the grid.
*
* @method serialize
* @param {HTMLElement} [$widgets] The collection of jQuery wrapped
* HTMLElements you want to serialize. If no argument is passed all widgets
* will be serialized.
* @return {Array} Returns an Array of Objects with the data specified in
* the serialize_params option.
*/
fn.serialize = function($widgets) {
$widgets || ($widgets = this.$widgets);
var result = [];
$widgets.each($.proxy(function(i, widget) {
result.push(this.options.serialize_params(
$(widget), $(widget).coords().grid ) );
}, this));
return result;
};
/**
* Returns a serialized array of the widgets that have changed their
* position.
*
* @method serialize_changed
* @return {Array} Returns an Array of Objects with the data specified in
* the serialize_params option.
*/
fn.serialize_changed = function() {
return this.serialize(this.$changed);
};
/**
* Creates the grid coords object representing the widget a add it to the
* mapped array of positions.
*
* @method register_widget
* @return {Array} Returns the instance of the Gridster class.
*/
fn.register_widget = function($el) {
var wgd = {
'col': parseInt($el.attr('data-col'), 10),
'row': parseInt($el.attr('data-row'), 10),
'size_x': parseInt($el.attr('data-sizex'), 10),
'size_y': parseInt($el.attr('data-sizey'), 10),
'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 = wgd;
this.add_to_gridmap(wgd, $el);
this.widgets.push($el);
return this;
};
/**
* Update in the mapped array of positions the value of cells represented by
* the grid coords object passed in the `grid_data` param.
*
* @param {Object} grid_data The grid coords object representing the cells
* to update in the mapped array.
* @param {HTMLElement|Boolean} value Pass `false` or the jQuery wrapped
* HTMLElement, depends if you want to delete an existing position or add
* a new one.
* @method update_widget_position
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.update_widget_position = function(grid_data, value) {
this.for_each_cell_occupied(grid_data, function(col, row) {
if (!this.gridmap[col]) { return this; }
this.gridmap[col][row] = value;
});
return this;
};
/**
* Remove a widget from the mapped array of positions.
*
* @method remove_from_gridmap
* @param {Object} grid_data The grid coords object representing the cells
* to update in the mapped array.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.remove_from_gridmap = function(grid_data) {
return this.update_widget_position(grid_data, false);
};
/**
* Add a widget to the mapped array of positions.
*
* @method add_to_gridmap
* @param {Object} grid_data The grid coords object representing the cells
* to update in the mapped array.
* @param {HTMLElement|Boolean} value The value to set in the specified
* position .
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.add_to_gridmap = function(grid_data, value) {
this.update_widget_position(grid_data, value || grid_data.el);
if (grid_data.el) {
var $widgets = this.widgets_below(grid_data.el);
$widgets.each($.proxy(function(i, widget) {
this.move_widget_up( $(widget));
}, this));
}
};
/**
* Make widgets draggable.
*
* @uses Draggable
* @method draggable
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.draggable = function() {
var self = this;
var draggable_options = $.extend(true, {}, this.options.draggable, {
offset_left: this.options.widget_margins[0],
start: function(event, ui) {
self.$widgets.filter('.player-revert')
.removeClass('player-revert');
self.$player = $(this);
self.$helper = self.options.draggable.helper === 'clone' ?
$(ui.helper) : self.$player;
self.helper = !self.$helper.is(self.$player);
self.on_start_drag.call(self, event, ui);
self.$el.trigger('gridster:dragstart');
},
stop: function(event, ui) {
self.on_stop_drag.call(self, event, ui);
self.$el.trigger('gridster:dragstop');
},
drag: throttle(function(event, ui) {
self.on_drag.call(self, event, ui);
self.$el.trigger('gridster:drag');
}, 60)
});
this.drag_api = this.$el.drag(draggable_options).data('drag');
return this;
};
/**
* This function is executed when the player begins to be dragged.
*
* @method on_start_drag
* @param {Event} The original browser event
* @param {Object} A prepared ui object.
*/
fn.on_start_drag = function(event, ui) {
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 = $.extend({}, this.player_grid_data);
//set new grid height along the dragging period
this.$el.css('height', this.$el.height() +
(this.player_grid_data.size_y * this.min_widget_height));
var colliders = this.faux_grid;
var coords = this.$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 = [];
// see jquery.collision.js
this.collision_api = this.$helper.collision(
colliders, this.options.collision);
this.$preview_holder = $('<li />', {
'class': 'preview-holder',
'data-row': this.$player.attr('data-row'),
'data-col': this.$player.attr('data-col'),
css: {
width: coords.width,
height: coords.height
}
}).appendTo(this.$el);
if (this.options.draggable.start) {
this.options.draggable.start.call(this, event, ui);
}
};
/**
* This function is executed when the player is being dragged.
*
* @method on_drag
* @param {Event} The original browser event
* @param {Object} A prepared ui object.
*/
fn.on_drag = function(event, ui) {
//break if dragstop has been fired
if (this.$player === null) {
return false;
};
var abs_offset = {
left: ui.position.left + this.baseX,
top: ui.position.top + this.baseY
};
this.colliders_data = this.collision_api.get_closest_colliders(
abs_offset);
this.on_overlapped_column_change(
this.on_start_overlapping_column,
this.on_stop_overlapping_column
);
this.on_overlapped_row_change(
this.on_start_overlapping_row,
this.on_stop_overlapping_row
);
if (this.helper && this.$player) {
this.$player.css({
'left': ui.position.left,
'top': ui.position.top
});
}
if (this.options.draggable.drag) {
this.options.draggable.drag.call(this, event, ui);
}
};
/**
* This function is executed when the player stops being dragged.
*
* @method on_stop_drag
* @param {Event} The original browser event
* @param {Object} A prepared ui object.
*/
fn.on_stop_drag = function(event, ui) {
this.$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,
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;
if (this.options.draggable.stop) {
this.options.draggable.stop.call(this, event, ui);
}
this.$preview_holder.remove();
this.$player = null;
this.$helper = null;
this.placeholder_grid_data = {};
this.player_grid_data = {};
this.cells_occupied_by_placeholder = {};
this.cells_occupied_by_player = {};
this.set_dom_grid_height();
};
/**
* Executes the callbacks passed as arguments when a column begins to be
* overlapped or stops being overlapped.
*
* @param {Function} start_callback Function executed when a new column
* begins to be overlapped. The column is passed as first argument.
* @param {Function} stop_callback Function executed when a column stops
* being overlapped. The column is passed as first argument.
* @method on_overlapped_column_change
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.on_overlapped_column_change = function(start_callback, stop_callback) {
if (!this.colliders_data.length) {
return;
}
var cols = this.get_targeted_columns(
this.colliders_data[0].el.data.col);
var last_n_cols = this.last_cols.length;
var n_cols = cols.length;
var i;
for (i = 0; i < n_cols; i++) {
if ($.inArray(cols[i], this.last_cols) === -1) {
(start_callback || $.noop).call(this, cols[i]);
}
}
for (i = 0; i< last_n_cols; i++) {
if ($.inArray(this.last_cols[i], cols) === -1) {
(stop_callback || $.noop).call(this, this.last_cols[i]);
}
}
this.last_cols = cols;
return this;
};
/**
* Executes the callbacks passed as arguments when a row starts to be
* overlapped or stops being overlapped.
*
* @param {Function} start_callback Function executed when a new row begins
* to be overlapped. The row is passed as first argument.
* @param {Function} stop_callback Function executed when a row stops being
* overlapped. The row is passed as first argument.
* @method on_overlapped_row_change
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.on_overlapped_row_change = function(start_callback, end_callback) {
if (!this.colliders_data.length) {
return;
}
var rows = this.get_targeted_rows(this.colliders_data[0].el.data.row);
var last_n_rows = this.last_rows.length;
var n_rows = rows.length;
var i;
for (i = 0; i < n_rows; i++) {
if ($.inArray(rows[i], this.last_rows) === -1) {
(start_callback || $.noop).call(this, rows[i]);
}
}
for (i = 0; i < last_n_rows; i++) {
if ($.inArray(this.last_rows[i], rows) === -1) {
(end_callback || $.noop).call(this, this.last_rows[i]);
}
}
this.last_rows = rows;
};
/**
* Sets the current position of the player
*
* @param {Function} start_callback Function executed when a new row begins
* to be overlapped. The row is passed as first argument.
* @param {Function} stop_callback Function executed when a row stops being
* overlapped. The row is passed as first argument.
* @method set_player
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.set_player = function(col, row, no_player) {
var self = this;
if (!no_player) {
this.empty_cells_player_occupies();
};
var cell = !no_player ? self.colliders_data[0].el.data : {col: col};
var to_col = cell.col;
var to_row = row || cell.row;
this.player_grid_data = {
col: to_col,
row: to_row,
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 $overlapped_widgets = this.get_widgets_overlapped(
this.player_grid_data);
var constraints = this.widgets_constraints($overlapped_widgets);
this.manage_movements(constraints.can_go_up, to_col, to_row);
this.manage_movements(constraints.can_not_go_up, to_col, to_row);
/* if there is not widgets overlapping in the new player position,
* update the new placeholder position. */
if (!$overlapped_widgets.length) {
var pp = this.can_go_player_up(this.player_grid_data);
if (pp !== false) {
to_row = pp;
}
this.set_placeholder(to_col, to_row);
}
return {
col: to_col,
row: to_row
};
};
/**
* See which of the widgets in the $widgets param collection can go to
* a upper row and which not.
*
* @method widgets_contraints
* @param {HTMLElements} $widgets A jQuery wrapped collection of
* HTMLElements.
* @return {Array} Returns a literal Object with two keys: `can_go_up` &
* `can_not_go_up`. Each contains a set of HTMLElements.
*/
fn.widgets_constraints = function($widgets) {
var $widgets_can_go_up = $([]);
var $widgets_can_not_go_up;
var wgd_can_go_up = [];
var wgd_can_not_go_up = [];
$widgets.each($.proxy(function(i, w) {
var $w = $(w);
var wgd = $w.coords().grid;
if (this.can_go_widget_up(wgd)) {
$widgets_can_go_up = $widgets_can_go_up.add($w);
wgd_can_go_up.push(wgd);
}else{
wgd_can_not_go_up.push(wgd);
}
}, this));
$widgets_can_not_go_up = $widgets.not($widgets_can_go_up);
return {
can_go_up: this.sort_by_row_asc(wgd_can_go_up),
can_not_go_up: this.sort_by_row_desc(wgd_can_not_go_up)
};
};
/**
* Sorts an Array of grid coords objects (representing the grid coords of
* each widget) in ascending way.
*
* @method sort_by_row_asc
* @param {Array} widgets Array of grid coords objects
* @return {Array} Returns the array sorted.
*/
fn.sort_by_row_asc = function(widgets) {
widgets = widgets.sort(function(a, b) {
if (!a.row) {
a = $(a).coords().grid;
b = $(b).coords().grid;
};
if (a.row > b.row) {
return 1;
}
return -1;
});
return widgets;
};
/**
* 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_and_col_asc
* @param {Array} widgets Array of grid coords objects
* @return {Array} Returns the array sorted.
*/
fn.sort_by_row_and_col_asc = function(widgets) {
widgets = widgets.sort(function(a, b) {
if (a.row > b.row || a.row == b.row && a.col > b.col) {
return 1;
}
return -1;
});
return widgets;
};
/**
* Sorts an Array of grid coords objects by column (representing the grid
* coords of each widget) in ascending way.
*
* @method sort_by_col_asc
* @param {Array} widgets Array of grid coords objects
* @return {Array} Returns the array sorted.
*/
fn.sort_by_col_asc = function(widgets) {
widgets = widgets.sort(function(a, b) {
if (a.col > b.col) {
return 1;
}
return -1;
});
return widgets;
};
/**
* Sorts an Array of grid coords objects (representing the grid coords of
* each widget) in descending way.
*
* @method sort_by_row_desc
* @param {Array} widgets Array of grid coords objects
* @return {Array} Returns the array sorted.
*/
fn.sort_by_row_desc = function(widgets) {
widgets = widgets.sort(function(a, b) {
if (a.row + a.size_y < b.row + b.size_y) {
return 1;
}
return -1;
});
return widgets;
};
/**
* Sorts an Array of grid coords objects (representing the grid coords of
* each widget) in descending way.
*
* @method manage_movements
* @param {HTMLElements} $widgets A jQuery collection of HTMLElements
* representing the widgets you want to move.
* @param {Number} to_col The column to which we want to move the widgets.
* @param {Number} to_row The row to which we want to move the widgets.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.manage_movements = function($widgets, to_col, to_row) {
$.each($widgets, $.proxy(function(i, w) {
var wgd = w;
var $w = wgd.el;
var can_go_widget_up = this.can_go_widget_up(wgd);
if (can_go_widget_up) {
//target CAN go up
//so move widget up
this.move_widget_to($w, can_go_widget_up);
this.set_placeholder(to_col, can_go_widget_up + wgd.size_y);
} else {
//target can't go up
var can_go_player_up = this.can_go_player_up(
this.player_grid_data);
if (!can_go_player_up) {
// target can't go up
// player cant't go up
// so we need to move widget down to a position that dont
// overlaps player
var y = (to_row + this.player_grid_data.size_y) - wgd.row;
this.move_widget_down($w, y);
this.set_placeholder(to_col, to_row);
}
}
}, this));
return this;
};
/**
* Determines if there is a widget in the row and col given. Or if the
* HTMLElement passed as first argument is the player.
*
* @method is_player
* @param {Number|HTMLElement} col_or_el A jQuery wrapped collection of
* HTMLElements.
* @param {Number} [row] The column to which we want to move the widgets.
* @return {Boolean} Returns true or false.
*/
fn.is_player = function(col_or_el, row) {
if (row && !this.gridmap[col_or_el]) { return false; }
var $w = row ? this.gridmap[col_or_el][row] : col_or_el;
return $w && ($w.is(this.$player) || $w.is(this.$helper));
};
/**
* Determines if the widget that is being dragged is currently over the row
* and col given.
*
* @method is_player_in
* @param {Number} col The column to check.
* @param {Number} row The row to check.
* @return {Boolean} Returns true or false.
*/
fn.is_player_in = function(col, row) {
var c = this.cells_occupied_by_player || {};
return $.inArray(col, c.cols) >= 0 && $.inArray(row, c.rows) >= 0;
};
/**
* Determines if the placeholder is currently over the row and col given.
*
* @method is_placeholder_in
* @param {Number} col The column to check.
* @param {Number} row The row to check.
* @return {Boolean} Returns true or false.
*/
fn.is_placeholder_in = function(col, row) {
var c = this.cells_occupied_by_placeholder || {};
return this.is_placeholder_in_col(col) && $.inArray(row, c.rows) >= 0;
};
/**
* Determines if the placeholder is currently over the column given.
*
* @method is_placeholder_in_col
* @param {Number} col The column to check.
* @return {Boolean} Returns true or false.
*/
fn.is_placeholder_in_col = function(col) {
var c = this.cells_occupied_by_placeholder || [];
return $.inArray(col, c.cols) >= 0;
};
/**
* Determines if the cell represented by col and row params is empty.
*
* @method is_empty
* @param {Number} col The column to check.
* @param {Number} row The row to check.
* @return {Boolean} Returns true or false.
*/
fn.is_empty = function(col, row) {
if (typeof this.gridmap[col] !== 'undefined' &&
typeof this.gridmap[col][row] !== 'undefined' &&
this.gridmap[col][row] === false
) {
return true;
}
return false;
};
/**
* Determines if the cell represented by col and row params is occupied.
*
* @method is_occupied
* @param {Number} col The column to check.
* @param {Number} row The row to check.
* @return {Boolean} Returns true or false.
*/
fn.is_occupied = function(col, row) {
if (!this.gridmap[col]) {
return false;
}
if (this.gridmap[col][row]) {
return true;
}
return false;
};
/**
* Determines if there is a widget in the cell represented by col/row params.
*
* @method is_widget
* @param {Number} col The column to check.
* @param {Number} row The row to check.
* @return {Boolean|HTMLElement} Returns false if there is no widget,
* else returns the jQuery HTMLElement
*/
fn.is_widget = function(col, row) {
var cell = this.gridmap[col];
if (!cell) {
return false;
}
cell = cell[row];
if (cell) {
return cell;
}
return false;
};
/**
* Determines if there is a widget in the cell represented by col/row
* params and if this is under the widget that is being dragged.
*
* @method is_widget_under_player
* @param {Number} col The column to check.
* @param {Number} row The row to check.
* @return {Boolean} Returns true or false.
*/
fn.is_widget_under_player = function(col, row) {
if (this.is_widget(col, row)) {
return this.is_player_in(col, row);
}
return false;
};
/**
* Get widgets overlapping with the player or with the object passed
* representing the grid cells.
*
* @method get_widgets_under_player
* @return {HTMLElement} Returns a jQuery collection of HTMLElements
*/
fn.get_widgets_under_player = function(cells) {
cells || (cells = this.cells_occupied_by_player || {cols: [], rows: []});
var $widgets = $([]);
$.each(cells.cols, $.proxy(function(i, col) {
$.each(cells.rows, $.proxy(function(i, row) {
if(this.is_widget(col, row)) {
$widgets = $widgets.add(this.gridmap[col][row]);
}
}, this));
}, this));
return $widgets;
};
/**
* Put placeholder at the row and column specified.
*
* @method set_placeholder
* @param {Number} col The column to which we want to move the
* placeholder.
* @param {Number} row The row to which we want to move the
* placeholder.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.set_placeholder = function(col, row) {
var phgd = $.extend({}, this.placeholder_grid_data);
var $nexts = this.widgets_below({
col: phgd.col,
row: phgd.row,
size_y: phgd.size_y,
size_x: phgd.size_x
});
// Prevents widgets go out of the grid
var right_col = (col + phgd.size_x - 1);
if (right_col > this.cols) {
col = col - (right_col - col);
}
var moved_down = this.placeholder_grid_data.row < row;
var changed_column = this.placeholder_grid_data.col !== col;
this.placeholder_grid_data.col = col;
this.placeholder_grid_data.row = row;
this.cells_occupied_by_placeholder = this.get_cells_occupied(
this.placeholder_grid_data);
this.$preview_holder.attr({
'data-row' : row,
'data-col' : col
});
if (moved_down || changed_column) {
$nexts.each($.proxy(function(i, widget) {
this.move_widget_up(
$(widget), this.placeholder_grid_data.col - col + phgd.size_y);
}, this));
}
var $widgets_under_ph = this.get_widgets_under_player(this.cells_occupied_by_placeholder);
if ($widgets_under_ph.length) {
$widgets_under_ph.each($.proxy(function(i, widget) {
var $w = $(widget);
this.move_widget_down(
$w, row + phgd.size_y - $w.data('coords').grid.row);
}, this));
};
};
/**
* Determines whether the player can move to a position above.
*
* @method can_go_player_up
* @param {Object} widget_grid_data The actual grid coords object of the
* player.
* @return {Number|Boolean} If the player can be moved to an upper row
* returns the row number, else returns false.
*/
fn.can_go_player_up = function(widget_grid_data) {
var p_bottom_row = widget_grid_data.row + widget_grid_data.size_y - 1;
var result = true;
var upper_rows = [];
var min_row = 10000;
var $widgets_under_player = this.get_widgets_under_player();
/* generate an array with columns as index and array with upper rows
* empty as value */
this.for_each_column_occupied(widget_grid_data, function(tcol) {
var grid_col = this.gridmap[tcol];
var r = p_bottom_row + 1;
upper_rows[tcol] = [];
while (--r > 0) {
if (this.is_empty(tcol, r) || this.is_player(tcol, r) ||
this.is_widget(tcol, r) &&
grid_col[r].is($widgets_under_player)
) {
upper_rows[tcol].push(r);
min_row = r < min_row ? r : min_row;
}else{
break;
}
}
if (upper_rows[tcol].length === 0) {
result = false;
return true; //break
}
upper_rows[tcol].sort();
});
if (!result) { return false; }
return this.get_valid_rows(widget_grid_data, upper_rows, min_row);
};
/**
* Determines whether a widget can move to a position above.
*
* @method can_go_widget_up
* @param {Object} widget_grid_data The actual grid coords object of the
* widget we want to check.
* @return {Number|Boolean} If the widget can be moved to an upper row
* returns the row number, else returns false.
*/
fn.can_go_widget_up = function(widget_grid_data) {
var p_bottom_row = widget_grid_data.row + widget_grid_data.size_y - 1;
var result = true;
var upper_rows = [];
var min_row = 10000;
/* generate an array with columns as index and array with topmost rows
* empty as value */
this.for_each_column_occupied(widget_grid_data, function(tcol) {
var grid_col = this.gridmap[tcol];
upper_rows[tcol] = [];
var r = p_bottom_row + 1;
// iterate over each row
while (--r > 0) {
if (this.is_widget(tcol, r) && !this.is_player_in(tcol, r)) {
if (!grid_col[r].is(widget_grid_data.el)) {
break;
};
}
if (!this.is_player(tcol, r) &&
!this.is_placeholder_in(tcol, r) &&
!this.is_player_in(tcol, r)) {
upper_rows[tcol].push(r);
};
if (r < min_row) {
min_row = r;
}
}
if (upper_rows[tcol].length === 0) {
result = false;
return true; //break
}
upper_rows[tcol].sort();
});
if (!result) { return false; }
return this.get_valid_rows(widget_grid_data, upper_rows, min_row);
};
/**
* Search a valid row for the widget represented by `widget_grid_data' in
* the `upper_rows` array. Iteration starts from row specified in `min_row`.
*
* @method get_valid_rows
* @param {Object} widget_grid_data The actual grid coords object of the
* player.
* @param {Array} upper_rows An array with columns as index and arrays
* of valid rows as values.
* @param {Number} min_row The upper row from which the iteration will start.
* @return {Number|Boolean} Returns the upper row valid from the `upper_rows`
* for the widget in question.
*/
fn.get_valid_rows = function(widget_grid_data, upper_rows, min_row) {
var p_top_row = widget_grid_data.row;
var p_bottom_row = widget_grid_data.row + widget_grid_data.size_y - 1;
var size_y = widget_grid_data.size_y;
var r = min_row - 1;
var valid_rows = [];
while (++r <= p_bottom_row ) {
var common = true;
$.each(upper_rows, function(col, rows) {
if ($.isArray(rows) && $.inArray(r, rows) === -1) {
common = false;
}
});
if (common === true) {
valid_rows.push(r);
if (valid_rows.length === size_y) {
break;
}
}
}
var new_row = false;
if (size_y === 1) {
if (valid_rows[0] !== p_top_row) {
new_row = valid_rows[0] || false;
}
}else{
if (valid_rows[0] !== p_top_row) {
new_row = this.get_consecutive_numbers_index(
valid_rows, size_y);
}
}
return new_row;
};
fn.get_consecutive_numbers_index = function(arr, size_y) {
var max = arr.length;
var result = [];
var first = true;
var prev = -1; // or null?
for (var i=0; i < max; i++) {
if (first || arr[i] === prev + 1) {
result.push(i);
if (result.length === size_y) {
break;
}
first = false;
}else{
result = [];
first = true;
}
prev = arr[i];
}
return result.length >= size_y ? arr[result[0]] : false;
};
/**
* Get widgets overlapping with the player.
*
* @method get_widgets_overlapped
* @return {HTMLElements} Returns a jQuery collection of HTMLElements.
*/
fn.get_widgets_overlapped = function() {
var $w;
var $widgets = $([]);
var used = [];
var rows_from_bottom = this.cells_occupied_by_player.rows.slice(0);
rows_from_bottom.reverse();
$.each(this.cells_occupied_by_player.cols, $.proxy(function(i, col) {
$.each(rows_from_bottom, $.proxy(function(i, row) {
// if there is a widget in the player position
if (!this.gridmap[col]) { return true; } //next iteration
var $w = this.gridmap[col][row];
if (this.is_occupied(col, row) && !this.is_player($w) &&
$.inArray($w, used) === -1
) {
$widgets = $widgets.add($w);
used.push($w);
}
}, this));
}, this));
return $widgets;
};
/**
* This callback is executed when the player begins to collide with a column.
*
* @method on_start_overlapping_column
* @param {Number} col The collided column.
* @return {HTMLElements} Returns a jQuery collection of HTMLElements.
*/
fn.on_start_overlapping_column = function(col) {
this.set_player(col, false);
};
/**
* A callback executed when the player begins to collide with a row.
*
* @method on_start_overlapping_row
* @param {Number} col The collided row.
* @return {HTMLElements} Returns a jQuery collection of HTMLElements.
*/
fn.on_start_overlapping_row = function(row) {
this.set_player(false, row);
};
/**
* A callback executed when the the player ends to collide with a column.
*
* @method on_stop_overlapping_column
* @param {Number} col The collided row.
* @return {HTMLElements} Returns a jQuery collection of HTMLElements.
*/
fn.on_stop_overlapping_column = function(col) {
this.set_player(col, false);
var self = this;
this.for_each_widget_below(col, this.cells_occupied_by_player.rows[0],
function(tcol, trow) {
self.move_widget_up(this, self.player_grid_data.size_y);
});
};
/**
* This callback is executed when the player ends to collide with a row.
*
* @method on_stop_overlapping_row
* @param {Number} row The collided row.
* @return {HTMLElements} Returns a jQuery collection of HTMLElements.
*/
fn.on_stop_overlapping_row = function(row) {
this.set_player(false, row);
var self = this;
var cols = this.cells_occupied_by_player.cols;
for (var c = 0, cl = cols.length; c < cl; c++) {
this.for_each_widget_below(cols[c], row, function(tcol, trow) {
self.move_widget_up(this, self.player_grid_data.size_y);
});
}
};
/**
* Move a widget to a specific row. The cell or cells must be empty.
* If the widget has widgets below, all of these widgets will be moved also
* if they can.
*
* @method move_widget_to
* @param {HTMLElement} $widget The jQuery wrapped HTMLElement of the
* widget is going to be moved.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.move_widget_to = function($widget, row) {
var self = this;
var widget_grid_data = $widget.coords().grid;
var diff = row - widget_grid_data.row;
var $next_widgets = this.widgets_below($widget);
var can_move_to_new_cell = this.can_move_to(
widget_grid_data, widget_grid_data.col, row, $widget);
if (can_move_to_new_cell === false) {
return false;
}
this.remove_from_gridmap(widget_grid_data);
widget_grid_data.row = row;
this.add_to_gridmap(widget_grid_data);
$widget.attr('data-row', row);
this.$changed = this.$changed.add($widget);
$next_widgets.each(function(i, widget) {
var $w = $(widget);
var wgd = $w.coords().grid;
var can_go_up = self.can_go_widget_up(wgd);
if (can_go_up && can_go_up !== wgd.row) {
self.move_widget_to($w, can_go_up);
}
});
return this;
};
/**
* Move up the specified widget and all below it.
*
* @method move_widget_up
* @param {HTMLElement} $widget The widget you want to move.
* @param {Number} [y_units] The number of cells that the widget has to move.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.move_widget_up = function($widget, y_units) {
var el_grid_data = $widget.coords().grid;
var actual_row = el_grid_data.row;
var moved = [];
var can_go_up = true;
y_units || (y_units = 1);
if (!this.can_go_up($widget)) { return false; } //break;
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 next_row = actual_row - y_units;
next_row = this.can_go_up_to_row(
widget_grid_data, col, next_row);
if (!next_row) {
return true;
}
var $next_widgets = this.widgets_below($widget);
this.remove_from_gridmap(widget_grid_data);
widget_grid_data.row = next_row;
this.add_to_gridmap(widget_grid_data);
$widget.attr('data-row', widget_grid_data.row);
this.$changed = this.$changed.add($widget);
moved.push($widget);
$next_widgets.each($.proxy(function(i, widget) {
this.move_widget_up($(widget), y_units);
}, this));
}
});
};
/**
* Move down the specified widget and all below it.
*
* @method move_widget_down
* @param {HTMLElement} $widget The jQuery object representing the widget
* you want to move.
* @param {Number} The number of cells that the widget has to move.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.move_widget_down = function($widget, y_units) {
var el_grid_data = $widget.coords().grid;
var actual_row = el_grid_data.row;
var moved = [];
var y_diff = y_units;
if (!$widget) { return false; }
if ($.inArray($widget, moved) === -1) {
var widget_grid_data = $widget.coords().grid;
var next_row = actual_row + y_units;
var $next_widgets = this.widgets_below($widget);
this.remove_from_gridmap(widget_grid_data);
$next_widgets.each($.proxy(function(i, widget) {
var $w = $(widget);
var wd = $w.coords().grid;
var tmp_y = this.displacement_diff(
wd, widget_grid_data, y_diff);
if (tmp_y > 0) {
this.move_widget_down($w, tmp_y);
}
}, this));
widget_grid_data.row = next_row;
this.update_widget_position(widget_grid_data, $widget);
$widget.attr('data-row', widget_grid_data.row);
this.$changed = this.$changed.add($widget);
moved.push($widget);
}
};
/**
* Check if the widget can move to the specified row, else returns the
* upper row possible.
*
* @method can_go_up_to_row
* @param {Number} widget_grid_data The current grid coords object of the
* widget.
* @param {Number} col The target column.
* @param {Number} row The target row.
* @return {Boolean|Number} Returns the row number if the widget can move
* to the target position, else returns false.
*/
fn.can_go_up_to_row = function(widget_grid_data, col, row) {
var ga = this.gridmap;
var result = true;
var urc = []; // upper_rows_in_columns
var actual_row = widget_grid_data.row;
var r;
/* generate an array with columns as index and array with
* upper rows empty in the column */
this.for_each_column_occupied(widget_grid_data, function(tcol) {
var grid_col = ga[tcol];
urc[tcol] = [];
r = actual_row;
while (r--) {
if (this.is_empty(tcol, r) &&
!this.is_placeholder_in(tcol, r)
) {
urc[tcol].push(r);
}else{
break;
}
}
if (!urc[tcol].length) {
result = false;
return true;
}
});
if (!result) { return false; }
/* get common rows starting from upper position in all the columns
* that widget occupies */
r = row;
for (r = 1; r < actual_row; r++) {
var common = true;
for (var uc = 0, ucl = urc.length; uc < ucl; uc++) {
if (urc[uc] && $.inArray(r, urc[uc]) === -1) {
common = false;
}
}
if (common === true) {
result = r;
break;
}
}
return result;
};
fn.displacement_diff = function(widget_grid_data, parent_bgd, y_units) {
var actual_row = widget_grid_data.row;
var diffs = [];
var parent_max_y = parent_bgd.row + parent_bgd.size_y;
this.for_each_column_occupied(widget_grid_data, function(col) {
var temp_y_units = 0;
for (var r = parent_max_y; r < actual_row; r++) {
if (this.is_empty(col, r)) {
temp_y_units = temp_y_units + 1;
}
}
diffs.push(temp_y_units);
});
var max_diff = Math.max.apply(Math, diffs);
y_units = (y_units - max_diff);
return y_units > 0 ? y_units : 0;
};
/**
* Get widgets below a widget.
*
* @method widgets_below
* @param {HTMLElement} $el The jQuery wrapped HTMLElement.
* @return {HTMLElements} A jQuery collection of HTMLElements.
*/
fn.widgets_below = function($el) {
var el_grid_data = $.isPlainObject($el) ? $el : $el.coords().grid;
var self = this;
var ga = this.gridmap;
var next_row = el_grid_data.row + el_grid_data.size_y - 1;
var $nexts = $([]);
this.for_each_column_occupied(el_grid_data, function(col) {
self.for_each_widget_below(col, next_row, function(tcol, trow) {
if (!self.is_player(this) && $.inArray(this, $nexts) === -1) {
$nexts = $nexts.add(this);
return true; // break
}
});
});
return this.sort_by_row_asc($nexts);
};
/**
* Update the array of mapped positions with the new player position.
*
* @method set_cells_player_occupies
* @param {Number} col The new player col.
* @param {Number} col The new player row.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.set_cells_player_occupies = function(col, row) {
this.remove_from_gridmap(this.placeholder_grid_data);
this.placeholder_grid_data.col = col;
this.placeholder_grid_data.row = row;
this.add_to_gridmap(this.placeholder_grid_data, this.$player);
return this;
};
/**
* Remove from the array of mapped positions the reference to the player.
*
* @method empty_cells_player_occupies
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.empty_cells_player_occupies = function() {
this.remove_from_gridmap(this.placeholder_grid_data);
return this;
};
fn.can_go_up = function($el) {
var el_grid_data = $el.coords().grid;
var initial_row = el_grid_data.row;
var prev_row = initial_row - 1;
var ga = this.gridmap;
var upper_rows_by_column = [];
var result = true;
if (initial_row === 1) { return false; }
this.for_each_column_occupied(el_grid_data, function(col) {
var $w = this.is_widget(col, prev_row);
if (this.is_occupied(col, prev_row) ||
this.is_player(col, prev_row) ||
this.is_placeholder_in(col, prev_row) ||
this.is_player_in(col, prev_row)
) {
result = false;
return true; //break
}
});
return result;
};
/**
* Check if it's possible to move a widget to a specific col/row. It takes
* into account the dimensions (`size_y` and `size_x` attrs. of the grid
* coords object) the widget occupies.
*
* @method can_move_to
* @param {Object} widget_grid_data The grid coords object that represents
* the widget.
* @param {Object} col The col to check.
* @param {Object} row The row to check.
* @return {Boolean} Returns true if all cells are empty, else return false.
*/
fn.can_move_to = function(widget_grid_data, col, row) {
var ga = this.gridmap;
var $w = widget_grid_data.el;
var future_wd = {
size_y: widget_grid_data.size_y,
size_x: widget_grid_data.size_x,
col: col,
row: row
};
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))) {
result = false;
}
});
return result;
};
/**
* Given the leftmost column returns all columns that are overlapping
* with the player.
*
* @method get_targeted_columns
* @param {Number} [from_col] The leftmost column.
* @return {Array} Returns an array with column numbers.
*/
fn.get_targeted_columns = function(from_col) {
var max = (from_col || this.player_grid_data.col) +
(this.player_grid_data.size_x - 1);
var cols = [];
for (var col = from_col; col <= max; col++) {
cols.push(col);
}
return cols;
};
/**
* Given the upper row returns all rows that are overlapping with the player.
*
* @method get_targeted_rows
* @param {Number} [from_row] The upper row.
* @return {Array} Returns an array with row numbers.
*/
fn.get_targeted_rows = function(from_row) {
var max = (from_row || this.player_grid_data.row) +
(this.player_grid_data.size_y - 1);
var rows = [];
for (var row = from_row; row <= max; row++) {
rows.push(row);
}
return rows;
};
/**
* Get all columns and rows that a widget occupies.
*
* @method get_cells_occupied
* @param {Object} el_grid_data The grid coords object of the widget.
* @return {Object} Returns an object like `{ cols: [], rows: []}`.
*/
fn.get_cells_occupied = function(el_grid_data) {
var cells = { cols: [], rows: []};
var i;
if (arguments[1] instanceof jQuery) {
el_grid_data = arguments[1].coords().grid;
}
for (i = 0; i < el_grid_data.size_x; i++) {
var col = el_grid_data.col + i;
cells.cols.push(col);
}
for (i = 0; i < el_grid_data.size_y; i++) {
var row = el_grid_data.row + i;
cells.rows.push(row);
}
return cells;
};
/**
* Iterate over the cells occupied by a widget executing a function for
* each one.
*
* @method for_each_cell_occupied
* @param {Object} el_grid_data The grid coords object that represents the
* widget.
* @param {Function} callback The function to execute on each column
* iteration. Column and row are passed as arguments.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.for_each_cell_occupied = function(grid_data, callback) {
this.for_each_column_occupied(grid_data, function(col) {
this.for_each_row_occupied(grid_data, function(row) {
callback.call(this, col, row);
});
});
return this;
};
/**
* Iterate over the columns occupied by a widget executing a function for
* each one.
*
* @method for_each_column_occupied
* @param {Object} el_grid_data The grid coords object that represents
* the widget.
* @param {Function} callback The function to execute on each column
* iteration. The column number is passed as first argument.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.for_each_column_occupied = function(el_grid_data, callback) {
for (var i = 0; i < el_grid_data.size_x; i++) {
var col = el_grid_data.col + i;
callback.call(this, col, el_grid_data);
}
};
/**
* Iterate over the rows occupied by a widget executing a function for
* each one.
*
* @method for_each_row_occupied
* @param {Object} el_grid_data The grid coords object that represents
* the widget.
* @param {Function} callback The function to execute on each column
* iteration. The row number is passed as first argument.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.for_each_row_occupied = function(el_grid_data, callback) {
for (var i = 0; i < el_grid_data.size_y; i++) {
var row = el_grid_data.row + i;
callback.call(this, row, el_grid_data);
}
};
fn._traversing_widgets = function(type, direction, col, row, callback) {
var ga = this.gridmap;
if (!ga[col]) { return; }
var cr, max;
var action = type + '/' + direction;
if (arguments[2] instanceof jQuery) {
var el_grid_data = arguments[2].coords().grid;
col = el_grid_data.col;
row = el_grid_data.row;
callback = arguments[3];
}
var matched = [];
var trow = row;
var methods = {
'for_each/above': function() {
while (trow--) {
if (trow > 0 && this.is_widget(col, trow) &&
$.inArray(ga[col][trow], matched) === -1
) {
cr = callback.call(ga[col][trow], col, trow);
matched.push(ga[col][trow]);
if (cr) { break; }
}
}
},
'for_each/below': function() {
for (trow = row + 1, max = ga[col].length; trow < max; trow++) {
if (this.is_widget(col, trow) &&
$.inArray(ga[col][trow], matched) === -1
) {
cr = callback.call(ga[col][trow], col, trow);
matched.push(ga[col][trow]);
if (cr) { break; }
}
}
}
};
if (methods[action]) {
methods[action].call(this);
}
};
/**
* Iterate over each widget above the column and row specified.
*
* @method for_each_widget_above
* @param {Number} col The column to start iterating.
* @param {Number} row The row to start iterating.
* @param {Function} callback The function to execute on each widget
* iteration. The value of `this` inside the function is the jQuery
* wrapped HTMLElement.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.for_each_widget_above = function(col, row, callback) {
this._traversing_widgets('for_each', 'above', col, row, callback);
return this;
};
/**
* Iterate over each widget below the column and row specified.
*
* @method for_each_widget_below
* @param {Number} col The column to start iterating.
* @param {Number} row The row to start iterating.
* @param {Function} callback The function to execute on each widget
* iteration. The value of `this` inside the function is the jQuery wrapped
* HTMLElement.
* @return {Class} Returns the instance of the Gridster Class.
*/
fn.for_each_widget_below = function(col, row, callback) {
this._traversing_widgets('for_each', 'below', col, row, callback);
return this;
};
/**
* Returns the highest occupied cell in the grid.
*
* @method get_highest_occupied_cell
* @return {Object} Returns an object with `col` and `row` numbers.
*/
fn.get_highest_occupied_cell = function() {
var r;
var gm = this.gridmap;
var rows = [];
var row_in_col = [];
for (var c = gm.length - 1; c >= 1; c--) {
for (r = gm[c].length - 1; r >= 1; r--) {
if (this.is_widget(c, r)) {
rows.push(r);
row_in_col[r] = c;
break;
}
}
}
var highest_row = Math.max.apply(Math, rows);
this.highest_occupied_cell = {
col: row_in_col[highest_row],
row: highest_row
};
return this.highest_occupied_cell;
};
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 $widgets;
}
/**
* Set the current height of the parent grid.
*
* @method set_dom_grid_height
* @return {Object} Returns the instance of the Gridster class.
*/
fn.set_dom_grid_height = function() {
var r = this.get_highest_occupied_cell().row;
this.$el.css('height', r * this.min_widget_height);
return this;
};
/**
* It generates the neccessary styles to position the widgets.
*
* @method generate_stylesheet
* @param {Number} rows Number of columns.
* @param {Number} cols Number of rows.
* @return {Object} Returns the instance of the Gridster class.
*/
fn.generate_stylesheet = function(opts) {
var styles = '';
var max_size_x = this.options.max_size_x;
var max_rows = 0;
var max_cols = 0;
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];
// don't duplicate stylesheets for the same configuration
var serialized_opts = $.param(opts);
if ($.inArray(serialized_opts, Gridster.generated_stylesheets) >= 0) {
return false;
}
Gridster.generated_stylesheets.push(serialized_opts);
/* generate CSS styles for cols */
for (i = opts.cols; 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 = opts.rows; 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 <= opts.rows; y++) {
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 += (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);
};
/**
* Injects the given CSS as string to the head of the document.
*
* @method add_style_tag
* @param {String} css The styles to apply.
* @return {Object} Returns the instance of the Gridster class.
*/
fn.add_style_tag = function(css) {
var d = document;
var tag = d.createElement('style');
d.getElementsByTagName('head')[0].appendChild(tag);
tag.setAttribute('type', 'text/css');
if (tag.styleSheet) {
tag.styleSheet.cssText = css;
}else{
tag.appendChild(document.createTextNode(css));
}
return this;
};
/**
* Generates a faux grid to collide with it when a widget is dragged and
* detect row or column that we want to go.
*
* @method generate_faux_grid
* @param {Number} rows Number of columns.
* @param {Number} cols Number of rows.
* @return {Object} Returns the instance of the Gridster class.
*/
fn.generate_faux_grid = function(rows, cols) {
this.faux_grid = [];
this.gridmap = [];
var col;
var row;
for (col = cols; col > 0; col--) {
this.gridmap[col] = [];
for (row = rows; row > 0; row--) {
this.add_faux_cell(row, col);
}
}
return this;
};
/**
* Add cell to the faux grid.
*
* @method add_faux_cell
* @param {Number} row The row for the new faux cell.
* @param {Number} col The col for the new faux cell.
* @return {Object} Returns the instance of the Gridster class.
*/
fn.add_faux_cell = function(row, col) {
var coords = $({
left: this.baseX + ((col - 1) * this.min_widget_width),
top: this.baseY + (row -1) * this.min_widget_height,
width: this.min_widget_width,
height: this.min_widget_height,
col: col,
row: row,
original_col: col,
original_row: row
}).coords();
this.gridmap[col][row] = false;
this.faux_grid.push(coords);
return this;
};
/**
* Add rows to the faux grid.
*
* @method add_faux_rows
* @param {Number} rows The number of rows you want to add to the faux grid.
* @return {Object} Returns the instance of the Gridster class.
*/
fn.add_faux_rows = function(rows) {
var actual_rows = this.rows;
var max_rows = actual_rows + (rows || 1);
for (var r = max_rows; r > actual_rows; r--) {
for (var c = this.cols; c >= 1; c--) {
this.add_faux_cell(r, c);
};
};
this.rows = max_rows;
if (this.options.autogenerate_stylesheet) {
this.generate_stylesheet({namespace: this.options.namespace});
}
return this;
};
/**
* Recalculates the offsets for the faux grid. You need to use it when
* the browser is resized.
*
* @method recalculate_faux_grid
* @return {Object} Returns the instance of the Gridster class.
*/
fn.recalculate_faux_grid = function() {
var aw = this.$wrapper.width();
this.baseX = ($(window).width() - aw) / 2;
this.baseY = this.$wrapper.offset().top;
$.each(this.faux_grid, $.proxy(function(i, coords) {
this.faux_grid[i] = coords.update({
left: this.baseX + (coords.data.col -1) * this.min_widget_width,
top: this.baseY + (coords.data.row -1) * this.min_widget_height
});
}, this));
return this;
};
/**
* Get all widgets in the DOM and register them.
*
* @method get_widgets_from_DOM
* @return {Object} Returns the instance of the Gridster class.
*/
fn.get_widgets_from_DOM = function() {
this.$widgets.each($.proxy(function(i, widget) {
this.register_widget($(widget));
}, this));
return this;
};
/**
* Calculate columns and rows to be set based on the configuration
* parameters, grid dimensions, etc ...
*
* @method generate_grid_and_stylesheet
* @return {Object} Returns the instance of the Gridster class.
*/
fn.generate_grid_and_stylesheet = function() {
var aw = this.$wrapper.width();
var ah = this.$wrapper.height();
var cols = Math.floor(aw / this.min_widget_width) +
this.options.extra_cols;
var actual_cols = this.$widgets.map(function() {
return $(this).attr('data-col');
});
actual_cols = Array.prototype.slice.call(actual_cols, 0);
//needed to pass tests with phantomjs
actual_cols.length || (actual_cols = [0]);
var min_cols = Math.max.apply(Math, actual_cols);
// get all rows that could be occupied by the current widgets
var max_rows = this.options.extra_rows;
this.$widgets.each(function(i, w){
max_rows += (+$(w).attr('data-sizey'));
});
this.cols = Math.max(min_cols, cols, this.options.min_cols);
this.rows = Math.max(max_rows, this.options.min_rows);
this.baseX = ($(window).width() - aw) / 2;
this.baseY = this.$wrapper.offset().top;
if (this.options.autogenerate_stylesheet) {
this.generate_stylesheet();
}
return this.generate_faux_grid(this.rows, this.cols);
};
//jQuery adapter
$.fn.gridster = function(options) {
return this.each(function() {
if (!$(this).data('gridster')) {
$(this).data('gridster', new Gridster( this, options ));
}
});
};
}(jQuery, window, document));
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