/// <reference path="jquery.js"/>
/*
* dragndrop
* version: 1.0.0 (05/13/2009)
* @ jQuery v1.2.*
*
* Licensed under the GPL:
*   http://gplv3.fsf.org
*
* Copyright 2008, 2009 Jericho [ thisnamemeansnothing[at]gmail.com ] 
*  usage:
*  
*/
//(function($) {
    $.extend($.fn, {
        getCss: function(key) {
            var v = parseInt(this.css(key));
            if (isNaN(v))
                return false;
            return v;
        }
    });
    $.fn.Drags = function(opts) {
        var ps = $.extend({
            zIndex: 20,
            opacity:  1, // .7,
            handler: null,
            onMove: function() { },
            onDrop: function() { }
        }, opts);
        var dragndrop = {
            drag: function(e) {
                var dragData = e.data.dragData;
                dragData.target.css({
                    right: dragData.right - e.screenX + dragData.offright,
                    bottom: dragData.bottom - e.screenY + dragData.offbottom
                });
                dragData.handler.css({ cursor: 'move' });
                dragData.onMove(e);
            },
            drop: function(e) {
                var dragData = e.data.dragData;
                dragData.target.css(dragData.oldCss); //.css({ 'opacity': '' });
                dragData.handler.css('cursor', dragData.oldCss.cursor);
                dragData.onDrop(e);
                $().unbind('mousemove', dragndrop.drag)
                    .unbind('mouseup', dragndrop.drop);
            }
        }
        return this.each(function() {
            var me = this;
            var handler = null;
            if (typeof ps.handler == 'undefined' || ps.handler == null)
                handler = $(me);
            else
                handler = (typeof ps.handler == 'string' ? $(ps.handler, this) : ps.handle);
            handler.bind('mousedown', { e: me }, function(s) {
                var target = $(s.data.e);
                var oldCss = {};
                if (target.css('position') != 'fixed') {
                    try {
                        target.position(oldCss);
                    } catch (ex) { }
                    target.css('position', 'fixed');
                }
                oldCss.cursor = target.css('cursor') || 'default';
                oldCss.opacity = target.getCss('opacity') || 1;
                var dragData = {
                    right: oldCss.right || target.getCss('right') || 0,
                    bottom: oldCss.bottom || target.getCss('bottom') || 0,
                    width: target.width() || target.getCss('width'),
                    height: target.height() || target.getCss('height'),
                    offright: s.screenX,
                    offbottom: s.screenY,
                    oldCss: oldCss,
                    onMove: ps.onMove,
                    onDrop: ps.onDrop,
                    handler: handler,
                    target: target
                }
                target.css('opacity', ps.opacity);
                $().bind('mousemove', { dragData: dragData }, dragndrop.drag)
                    .bind('mouseup', { dragData: dragData }, dragndrop.drop);
            });
        });
    }
//})(jQuery);