/* 
* jQuery dynamicBlocks v1.0.0 
* Copyright (c) 2008 Taranets Aleksey 
* www: markup-javascript.com 
* Licensed under the MIT License: 
* http://www.opensource.org/licenses/mit-license.php 
*/

jQuery.fn.dynamicBlocks = function(_opt){
	// defaults options
	var _opt = jQuery.extend({
		opener:'a',
		changeStyle:'left',
		setParam:'0',
		event:'click',
		duration:500
	},_opt);
	return this.each(function(){
	var _obj = jQuery(this);
		var _defParam = parseInt(_obj.css(_opt.changeStyle));
		var _setParam = parseInt(_opt.setParam);
		var _opener = jQuery(_opt.opener, _obj);
		var _duration = _opt.duration;
		var _style = _opt.changeStyle.toString();
		
		_obj.addClass("blockDefault")
		// clic event
		if (_opt.opener && _opt.event != 'move') {
			_opener.bind(_opt.event, function(){
				if (!_obj.hasClass('blockChange')){
					_obj.addClass('blockChange');
					_obj.removeClass("blockDefault");
					eval('_obj.animate({'+_style+' : '+_setParam+'}, '+_duration+', false)');
				} else {
					eval('_obj.animate({'+_style+' : '+_defParam+'}, '+_duration+', false, function(){_obj.removeClass("blockChange"), _obj.addClass("blockDefault")})');
				}
				return false; 
			});
		// move event
		} else if (_opt.event == 'move') {
			var _changeX = false, _changeY = false, _revers = 1;
			// set change parametr
			if (_style == 'left' || _style == 'right' || _style == 'marginLeft' || _style == 'marginRight') _changeX = true;
			if (_style == 'top' || _style == 'bottom' || _style == 'marginTop' || _style == 'marginBottom') _changeY = true;
			if (_style == 'bottom' || _style == 'right' || _style == 'marginRight' || _style == 'marginBottom') _revers = -1;
			
			_opener.click(function(){return false});
			var _firstDown = true, _xDef, _yDef;
			_opener.bind('mousedown', function(e){
				if (!e) e = window.event;
				if (_firstDown) {
					_xDef = e.clientX;
					_yDef = e.clientY;
					_firstDown = false;
				}
				$(document).bind('mousemove', function(ev){
					if (!ev) ev = window.event;
					var _x = ev.clientX;
					var _y = ev.clientY;
					var _def, _change, _dif;
					if (_changeX) { _def = _xDef; _change = _x; }
					if (_changeY) { _def = _yDef; _change = _y; }
					
					_dif = _defParam + (_change - _def)*_revers;
					
					if (_setParam < _defParam) {
						if (_dif < _setParam) {_dif = _setParam;}
						if (_dif >= _defParam) {_dif = _defParam; _obj.removeClass('blockChange'); _obj.addClass("blockDefault");}
						else {_obj.addClass('blockChange'); _obj.removeClass("blockDefault");}
					} else {
						if (_dif > _setParam) {_dif = _setParam;}
						if (_dif <= _defParam) {_dif = _defParam; _obj.removeClass('blockChange'); _obj.addClass("blockDefault");}
						else {_obj.addClass('blockChange'); _obj.removeClass("blockDefault");}
					}
					
					_obj.css(_style, _dif);
					
					return false;
				});
				$(document).bind('mouseup', function(e){
					$(document).unbind('mousemove');
					$(document).unbind('mouseup');
					return false;
				});
				return false;
			});
		}
	});
}