CRM_EasyUI_2016/Scripts/easyui/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: jeasyui@gmail.com
 * http://www.gnu.org/licenses/gpl.txt
 * http://www.jeasyui.com/license_commercial.php
 * 
 * Dependencies:
 *   combo
 * 
 */
(function($){
	/**
	 * 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);
			}
		}
	}
	
	/**
	 * select previous item
	 */
	function selectPrev(target){
		var panel = $(target).combo('panel');
		var values = $(target).combo('getValues');
		var item = panel.find('div.combobox-item[value="' + values.pop() + '"]');
		if (item.length){
			var prev = item.prev(':visible');
			if (prev.length){
				item = prev;
			}
		} else {
			item = panel.find('div.combobox-item:visible:last');
		}
		var value = item.attr('value');
		select(target, value);
//		setValues(target, [value]);
		scrollTo(target, value);
	}
	
	/**
	 * select next item
	 */
	function selectNext(target){
		var panel = $(target).combo('panel');
		var values = $(target).combo('getValues');
		var item = panel.find('div.combobox-item[value="' + values.pop() + '"]');