SimpleTaskSystem.Web/Content/jquery-easyui-1.3.1/src/jquery.draggable.js

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/**
 * draggable - jQuery EasyUI
 * 
 * Licensed under the GPL terms
 * To use it on other terms please contact us
 *
 * Copyright(c) 2009-2012 stworthy [ stworthy@gmail.com ] 
 */
(function($){
	var isDragging = false;
	function drag(e){
		var opts = $.data(e.data.target, 'draggable').options;
		
		var dragData = e.data;
		var left = dragData.startLeft + e.pageX - dragData.startX;
		var top = dragData.startTop + e.pageY - dragData.startY;
		
		if (opts.deltaX != null && opts.deltaX != undefined){
			left = e.pageX + opts.deltaX;
		}
		if (opts.deltaY != null && opts.deltaY != undefined){
			top = e.pageY + opts.deltaY;
		}
		
		if (e.data.parent != document.body) {
			left += $(e.data.parent).scrollLeft();
			top += $(e.data.parent).scrollTop();
		}
		
		if (opts.axis == 'h') {
			dragData.left = left;
		} else if (opts.axis == 'v') {
			dragData.top = top;
		} else {
			dragData.left = left;
			dragData.top = top;
		}
	}
	
	function applyDrag(e){
		var opts = $.data(e.data.target, 'draggable').options;
		var proxy = $.data(e.data.target, 'draggable').proxy;
		if (!proxy){
			proxy = $(e.data.target);
		}
//		if (proxy){
//			proxy.css('cursor', opts.cursor);
//		} else {
//			proxy = $(e.data.target);
//			$.data(e.data.target, 'draggable').handle.css('cursor', opts.cursor);
//		}
		proxy.css({
			left:e.data.left,
			top:e.data.top
		});
		$('body').css('cursor', opts.cursor);
	}
	
	function doDown(e){
		isDragging = true;