/*
 * jQuery crawlLine v1.2.0
 * Copyright (c) 2008 Taranets Aleksey
 * email: aleks_tar@ukr.net
 * www: markup-javascript.com
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 */

jQuery.fn.crawlLine = function(_options){
	// defaults options
	var _options = jQuery.extend({
		speed:2,
		crawElement:'div',
		textElement:'p',
		hoverClass:'viewText'
	},_options);
	
	return this.each(function(){
		var _THIS = jQuery(this);
		var _el = $(_options.crawElement, _THIS).css('position','relative');
		var _text = $(_options.textElement, _THIS);
		var _clone = _text.css('whiteSpace','nowrap').clone();
		var _elWidth = 0;
		var _k = 1;
		
		// set parametrs *******************************************************
		var _textWidth = 0;
		_text.each(function(){
			_textWidth += $(this).outerWidth(true);
		});
		var _duration = _textWidth*50 / _options.speed;
		_el.append(_clone);
		_el.css('width',_textWidth*2);
		
	    var animate = function() {
			_el.animate({left:-_textWidth}, {queue:false, duration:_duration*_k, easing:'linear', complete:function(){
				_el.css('left','0');
				_k=1;
				animate();
			}})
	    }
	    animate();
	_THIS.bind('wheel',function(event,delta){
			var _marginScroll;
			if (delta<0) {
				_marginScroll = parseInt(_el.css('left')) - 20;
				_el.animate({left:_marginScroll}, {queue:false, duration:100, easing:'linear', complete:function(){
					_k = (_textWidth + parseInt(_el.css('left')))/_textWidth;
				}});
			} else {
				_marginScroll = parseInt(_el.css('left')) + 20;
				if (_marginScroll > 0) _marginScroll = 0;
				_el.animate({left:_marginScroll}, {queue:false, duration:100, easing:'linear', complete:function(){
					_k = (_textWidth + parseInt(_el.css('left')))/_textWidth;
				}});
			}
			return false;
		});
	});
}