WebContent/jquery-easyui-1.3.3/src/jquery.combobox.js

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/**
 * combobox - jQuery EasyUI
 * 
 * Copyright (c) 2009-2013 www.jeasyui.com. All rights reserved.
 *
 * Licensed under the GPL or commercial licenses
 * To use it on other terms please contact us: info@jeasyui.com
 * http://www.gnu.org/licenses/gpl.txt
 * http://www.jeasyui.com/license_commercial.php
 * 
 * Dependencies:
 *   combo
 * 
 */
(function($){
	function findDataItem(data,key,value){
		for(var i=0; i<data.length; i++){
			var item = data[i];
			if (item[key] == value){return item}
		}
		return null;
	}
	
	/**
	 * scroll panel to display the specified item
	 */
	function scrollTo(target, value){
		var panel = $(target).combo('panel');
		var item = panel.find('div.combobox-item[value="' + value + '"]');
		if (item.length){
			if (item.position().top <= 0){
				var h = panel.scrollTop() + item.position().top;
				panel.scrollTop(h);
			} else if (item.position().top + item.outerHeight() > panel.height()){
				var h = panel.scrollTop() + item.position().top + item.outerHeight() - panel.height();
				panel.scrollTop(h);
			}
		}
	}
	
	function nav(target, dir){
		var opts = $(target).combobox('options');
		var panel = $(target).combobox('panel');
		var item = panel.children('div.combobox-item-hover');
		if (!item.length){
			item = panel.children('div.combobox-item-selected');
		}
		item.removeClass('combobox-item-hover');
		if (!item.length){
			item = panel.children('div.combobox-item:visible:' + (dir=='next'?'first':'last'));
		} else {
			if (dir == 'next'){
				item = item.nextAll(':visible:first');
				if (!item.length){
					item = panel.children('div.combobox-item:visible:first');
				}
			} else {
				item = item.prevAll(':visible:first');
				if (!item.length){
					item = panel.children('div.combobox-item:visible:last');