FarmTrace/easyui-1.4.1/src/jquery.combobox.js

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/**
 * jQuery EasyUI 1.4.1
 * 
 * Copyright (c) 2009-2014 www.jeasyui.com. All rights reserved.
 *
 * Licensed under the GPL license: http://www.gnu.org/licenses/gpl.txt
 * To use it on other terms please contact us at info@jeasyui.com
 *
 */
/**
 * combobox - jQuery EasyUI
 * 
 * Dependencies:
 *   combo
 * 
 */
(function($){
	var COMBOBOX_SERNO = 0;
	
	function getRowIndex(target, value){
		var state = $.data(target, 'combobox');
		var opts = state.options;
		var data = state.data;
		for(var i=0; i<data.length; i++){
			if (data[i][opts.valueField] == value){
				return i;
			}
		}
		return -1;
	}
	
	/**
	 * scroll panel to display the specified item
	 */
	function scrollTo(target, value){
		var opts = $.data(target, 'combobox').options;
		var panel = $(target).combo('panel');
		var item = opts.finder.getEl(target, 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 = $.data(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');
		var firstSelector = 'div.combobox-item:visible:not(.combobox-item-disabled):first';
		var lastSelector = 'div.combobox-item:visible:not(.combobox-item-disabled):last';
		if (!item.length){