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/*
* jquery.coords
* https://github.com/ducksboard/gridster.js
*
* Copyright (c) 2012 ducksboard
* Licensed under the MIT licenses.
*/
;(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));
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