Extjs中ComboBoxTree实现的下拉框树效果(自写)

首页

web前端

js教程

Extjs中ComboBoxTree实现的下拉框树效果(自写)_extjs

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 05:33 PM

最近涉及到的一个项目中，需要实现ComboBoxTree的效果，首先，看看效果吧……
Extjs中ComboBoxTree实现的下拉框树效果(自写)_extjs
在Extjs中是没有这种效果的，所以得自己写，在网络上看了看别人的资料，自己再总结了一下，修改了一下，代码如下：

复制代码代码如下:

Ext.ux.TreeCombo = Ext.extend(Ext.form.ComboBox, { 
constructor: function (cfg) { 
cfg = cfg || {}; 
Ext.ux.TreeCombo.superclass.constructor.call(this, Ext.apply({ 
maxHeight: 300, 
editable: false, 
mode: 'local', 
triggerAction: 'all', 
rootVisible: false, 
selectMode: 'all' 
}, cfg)); 
}, 
store: new Ext.data.SimpleStore({ 
fields: [], 
data: [[]] 
}), 
// 重写onViewClick，使展开树结点是不关闭下拉框 
onViewClick: function (doFocus) { 
var index = this.view.getSelectedIndexes()[0], s = this.store, r = s.getAt(index); 
if (r) { 
this.onSelect(r, index); 
} 
if (doFocus !== false) { 
this.el.focus(); 
} 
}, 
tree: null, 
// 隐藏值 
hiddenValue: null, 
getHiddenValue: function () { 
return this.hiddenValue; 
}, 
getValue: function () { //增加适用性，与原来combo组件一样 
return this.hiddenValue; 
}, 
setHiddenValue: function (code, dispText) { 
this.setValue(code); 
Ext.form.ComboBox.superclass.setValue.call(this, dispText); 
this.hiddenValue = code; 
}, 
initComponent: function () { 
var _this = this; 
var tplRandomId = 'deptcombo_' + Math.floor(Math.random() * 1000) + this.tplId 
this.tpl = "
" 
this.tree = new Ext.tree.TreePanel({ 
border: false, 
enableDD: false, 
enableDrag: false, 
rootVisible: _this.rootVisible || false, 
autoScroll: true, 
trackMouseOver: true, 
height: _this.maxHeight, 
lines: true, 
singleExpand: true, 
root: new Ext.tree.AsyncTreeNode({ 
id: _this.rootId, 
text: _this.rootText, 
iconCls: 'ico-root', 
expanded: true, 
leaf: false, 
border: false, 
draggable: false, 
singleClickExpand: false, 
hide: true 
}), 
loader: new Ext.tree.TreeLoader({ 
nodeParameter: 'ID', 
requestMethod: 'GET', 
dataUrl: _this.url 
}) 
}); 
this.tree.on('click', function (node) { 
if ((_this.selectMode == 'leaf' && node.leaf == true) || _this.selectMode == 'all') { 
if (_this.fireEvent('beforeselect', _this, node)) { 
_this.fireEvent('select', _this, node); 
} 
} 
}); 
this.on('select', function (obj, node) { 
var dispText = node.text; 
var code = node.id; 
obj.setHiddenValue(code, dispText); 
obj.collapse(); 
}); 
this.on('expand', function () { 
this.tree.render(tplRandomId); 
}); 
Ext.ux.TreeCombo.superclass.initComponent.call(this); 
} 
}) 
Ext.reg("treecombo", Ext.ux.TreeCombo); 

之后呢，在主页中添加Extjs类库

复制代码代码如下:

其中，login.js的代码如下：

复制代码代码如下:

 
/* File Created: 五月 27, 2013 */ 
Ext.onReady(function () { 
var _window = new Ext.Window({ 
title: "查询条件", 
renderTo: Ext.getBody(), 
frame: true, 
plain: true, 
buttonAlign: "center", 
closeAction: "hide", 
maximizable: true, 
closable: true, 
bodyStyle: "padding:20px", 
width: 350, 
height: 300, 
layout: "form", 
lableWidth: 110, 
defaults: { xtype: "textfield", width: 180 }, 
items: [ 
{ 
fieldLabel: "案件编号", 
anchor: "100%" 
}, 
{ 
xtype: "datefield", 
fieldLabel: "案发时间", 
anchor: "100%" 
}, 
{ 
fieldLabel: "举报人", 
anchor: "100%" 
}, 
{ 
fieldLabel: "被举报单位或个人", 
anchor: "100%" 
}, 
{ 
xtype: "treecombo", 
fieldLabel: "案件发生地", 
anchor: "100%", 
url: "http://localhost:1502/treeData.ashx"///  
}, 
{ 
xtype: "treecombo", 
fieldLabel: "案件类型", 
anchor: "100%", 
url: "http://localhost:1502/window/ajwflx.ashx" 
}, 
{ 
xtype: "treecombo", 
fieldLabel: "案件性质", 
anchor: "100%", 
url: "http://localhost:1502/window/ajwfxz.ashx" 
} 
], 
buttons: [{ text: "确定" }, { text: "取消", handler: function () { _window.hide(); } }] 
}) 
_window.show(); 
}) 

treedata.ashxd的内容为：

复制代码代码如下:

 
string strTreeNode = "[" + 
"{'id':150100,'leaf':false,expanded:false,'text':'呼和浩特市国土资源局','children':[" + 
"{'id':150101,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150102,'leaf':true,'children':null,'text':'新城区国土资源局'}," + 
"{'id':150103,'leaf':true,'children':null,'text':'回民区国土资源局'}," + 
"{'id':150104,'leaf':true,'children':null,'text':'玉泉区国土资源局'}," + 
"{'id':150105,'leaf':true,'children':null,'text':'赛罕区国土资源局'}," + 
"{'id':150121,'leaf':true,'children':null,'text':'土默特左旗国土资源局'}," + 
"{'id':150122,'leaf':true,'children':null,'text':'托克托县国土资源局'}," + 
"{'id':150123,'leaf':true,'children':null,'text':'和林格尔县国土资源局'}," + 
"{'id':150124,'leaf':true,'children':null,'text':'清水河县国土资源局'}," + 
"{'id':150125,'leaf':true,'children':null,'text':'武川县国土资源局'}" + 
"]}," + 
"{'id':150200,'leaf':false,expanded:false,'text':'包头市国土资源局','children':[" + 
"{'id':150201,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150202,'leaf':true,'children':null,'text':'东河区国土资源局'}," + 
"{'id':150203,'leaf':true,'children':null,'text':'昆都仑区国土资源局'}," + 
"{'id':150204,'leaf':true,'children':null,'text':'青山区国土资源局'}," + 
"{'id':150205,'leaf':true,'children':null,'text':'石拐区国土资源局'}," + 
"{'id':150206,'leaf':true,'children':null,'text':'白云矿区国土资源局'}," + 
"{'id':150207,'leaf':true,'children':null,'text':'九原区国土资源局'}," + 
"{'id':150221,'leaf':true,'children':null,'text':'土默特右旗国土资源局'}," + 
"{'id':150222,'leaf':true,'children':null,'text':'固阳县国土资源局'}," + 
"{'id':150223,'leaf':true,'children':null,'text':'达尔罕茂明安联合旗国土资源局'}" + 
"]}," + 
"{'id':150300,'leaf':false,expanded:false,'text':'乌海市国土资源局','children':[" + 
"{'id':150301,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150302,'leaf':true,'children':null,'text':'海勃湾区国土资源局'}," + 
"{'id':150303,'leaf':true,'children':null,'text':'海南区国土资源局'}," + 
"{'id':150304,'leaf':true,'children':null,'text':'乌达区国土资源局'}" + 
"]}," + 
"{'id':150400,'leaf':false,expanded:false,'text':'赤峰市国土资源局','children':[" + 
"{'id':150401,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150402,'leaf':true,'children':null,'text':'红山区国土资源局'}," + 
"{'id':150403,'leaf':true,'children':null,'text':'元宝山区国土资源局'}," + 
"{'id':150404,'leaf':true,'children':null,'text':'松山区国土资源局'}," + 
"{'id':150421,'leaf':true,'children':null,'text':'阿鲁科尔沁旗国土资源局'}," + 
"{'id':150422,'leaf':true,'children':null,'text':'巴林左旗国土资源局'}," + 
"{'id':150423,'leaf':true,'children':null,'text':'巴林右旗国土资源局'}," + 
"{'id':150424,'leaf':true,'children':null,'text':'林西县国土资源局'}," + 
"{'id':150425,'leaf':true,'children':null,'text':'克什克腾旗国土资源局'}," + 
"{'id':150426,'leaf':true,'children':null,'text':'翁牛特旗国土资源局'}," + 
"{'id':150428,'leaf':true,'children':null,'text':'喀喇沁旗国土资源局'}," + 
"{'id':150429,'leaf':true,'children':null,'text':'宁城县国土资源局'}," + 
"{'id':150430,'leaf':true,'children':null,'text':'敖汉旗国土资源局'}" + 
"]}," + 
"{'id':150500,'leaf':false,expanded:false,'text':'通辽市国土资源局','children':[" + 
"{'id':150501,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150502,'leaf':true,'children':null,'text':'科尔沁区国土资源局'}," + 
"{'id':150521,'leaf':true,'children':null,'text':'科尔沁左翼中旗国土资源局'}," + 
"{'id':150522,'leaf':true,'children':null,'text':'科尔沁左翼后旗国土资源局'}," + 
"{'id':150523,'leaf':true,'children':null,'text':'开鲁县国土资源局'}," + 
"{'id':150524,'leaf':true,'children':null,'text':'库伦旗国土资源局'}," + 
"{'id':150525,'leaf':true,'children':null,'text':'奈曼旗国土资源局'}," + 
"{'id':150526,'leaf':true,'children':null,'text':'扎鲁特旗国土资源局'}," + 
"{'id':150581,'leaf':true,'children':null,'text':'霍林郭勒市国土资源局'}" + 
"]}," + 
"{'id':150600,'leaf':false,expanded:false,'text':'鄂尔多斯市国土资源局','children':[" + 
"{'id':150602,'leaf':true,'children':null,'text':'东胜区国土资源局'}," + 
"{'id':150621,'leaf':true,'children':null,'text':'达拉特旗国土资源局'}," + 
"{'id':150622,'leaf':true,'children':null,'text':'准格尔旗国土资源局'}," + 
"{'id':150623,'leaf':true,'children':null,'text':'鄂托克前旗国土资源局'}," + 
"{'id':150624,'leaf':true,'children':null,'text':'鄂托克旗国土资源局'}," + 
"{'id':150625,'leaf':true,'children':null,'text':'杭锦旗国土资源局'}," + 
"{'id':150626,'leaf':true,'children':null,'text':'乌审旗国土资源局'}," + 
"{'id':150627,'leaf':true,'children':null,'text':'伊金霍洛旗国土资源局'}" + 
"]}," + 
"{'id':150700,'leaf':false,expanded:false,'text':'呼伦贝尔市国土资源局','children':[" + 
"{'id':150701,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150702,'leaf':true,'children':null,'text':'海拉尔区国土资源局'}," + 
"{'id':150721,'leaf':true,'children':null,'text':'阿荣旗国土资源局'}," + 
"{'id':150722,'leaf':true,'children':null,'text':'莫力达瓦达斡尔族自治旗国土资源局'}," + 
"{'id':150723,'leaf':true,'children':null,'text':'鄂伦春自治旗国土资源局'}," + 
"{'id':150724,'leaf':true,'children':null,'text':'鄂温克族自治旗国土资源局'}," + 
"{'id':150725,'leaf':true,'children':null,'text':'陈巴尔虎旗国土资源局'}," + 
"{'id':150726,'leaf':true,'children':null,'text':'新巴尔虎左旗国土资源局'}," + 
"{'id':150727,'leaf':true,'children':null,'text':'新巴尔虎右旗国土资源局'}," + 
"{'id':150781,'leaf':true,'children':null,'text':'满洲里市国土资源局'}," + 
"{'id':150782,'leaf':true,'children':null,'text':'牙克石市国土资源局'}," + 
"{'id':150783,'leaf':true,'children':null,'text':'扎兰屯市国土资源局'}," + 
"{'id':150784,'leaf':true,'children':null,'text':'额尔古纳市国土资源局'}," + 
"{'id':150785,'leaf':true,'children':null,'text':'根河市国土资源局'}" + 
"]}," + 
"{'id':150800,'leaf':false,expanded:false,'text':'巴彦淖尔市国土资源局','children':[" + 
"{'id':150801,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150802,'leaf':true,'children':null,'text':'临河区国土资源局'}," + 
"{'id':150821,'leaf':true,'children':null,'text':'五原县国土资源局'}," + 
"{'id':150822,'leaf':true,'children':null,'text':'磴口县国土资源局'}," + 
"{'id':150823,'leaf':true,'children':null,'text':'乌拉特前旗国土资源局'}," + 
"{'id':150824,'leaf':true,'children':null,'text':'乌拉特中旗国土资源局'}," + 
"{'id':150825,'leaf':true,'children':null,'text':'乌拉特后旗国土资源局'}," + 
"{'id':150826,'leaf':true,'children':null,'text':'杭锦后旗国土资源局'}" + 
"]}," + 
"{'id':150900,'leaf':false,expanded:false,'text':'乌兰察布市国土资源局','children':[" + 
"{'id':150901,'leaf':true,'children':null,'text':'市辖区国土资源局'}," + 
"{'id':150902,'leaf':true,'children':null,'text':'集宁区国土资源局'}," + 
"{'id':150921,'leaf':true,'children':null,'text':'卓资县国土资源局'}," + 
"{'id':150922,'leaf':true,'children':null,'text':'化德县国土资源局'}," + 
"{'id':150923,'leaf':true,'children':null,'text':'商都县国土资源局'}," + 
"{'id':150924,'leaf':true,'children':null,'text':'兴和县国土资源局'}," + 
"{'id':150925,'leaf':true,'children':null,'text':'凉城县国土资源局'}," + 
"{'id':150926,'leaf':true,'children':null,'text':'察哈尔右翼前旗国土资源局'}," + 
"{'id':150927,'leaf':true,'children':null,'text':'察哈尔右翼中旗国土资源局'}," + 
"{'id':150928,'leaf':true,'children':null,'text':'察哈尔右翼后旗国土资源局'}," + 
"{'id':150929,'leaf':true,'children':null,'text':'四子王旗国土资源局'}," + 
"{'id':150981,'leaf':true,'children':null,'text':'丰镇市国土资源局'}" + 
"]}," + 
"{'id':152200,'leaf':false,expanded:false,'text':'兴安盟国土资源局','children':[" + 
"{'id':152201,'leaf':true,'children':null,'text':'乌兰浩特市国土资源局'}," + 
"{'id':152202,'leaf':true,'children':null,'text':'阿尔山市国土资源局'}," + 
"{'id':152221,'leaf':true,'children':null,'text':'科尔沁右翼前旗国土资源局'}," + 
"{'id':152222,'leaf':true,'children':null,'text':'科尔沁右翼中旗国土资源局'}," + 
"{'id':152223,'leaf':true,'children':null,'text':'扎赉特旗国土资源局'}," + 
"{'id':152224,'leaf':true,'children':null,'text':'突泉县国土资源局'}" + 
"]}," + 
"{'id':152500,'leaf':false,expanded:false,'text':'锡林郭勒盟国土资源局','children':[" + 
"{'id':152501,'leaf':true,'children':null,'text':'二连浩特市国土资源局'}," + 
"{'id':152502,'leaf':true,'children':null,'text':'锡林浩特市国土资源局'}," + 
"{'id':152522,'leaf':true,'children':null,'text':'阿巴嘎旗国土资源局'}," + 
"{'id':152523,'leaf':true,'children':null,'text':'苏尼特左旗国土资源局'}," + 
"{'id':152524,'leaf':true,'children':null,'text':'苏尼特右旗国土资源局'}," + 
"{'id':152525,'leaf':true,'children':null,'text':'东乌珠穆沁旗国土资源局'}," + 
"{'id':152526,'leaf':true,'children':null,'text':'西乌珠穆沁旗国土资源局'}," + 
"{'id':152527,'leaf':true,'children':null,'text':'太仆寺旗国土资源局'}," + 
"{'id':152528,'leaf':true,'children':null,'text':'镶黄旗国土资源局'}," + 
"{'id':152529,'leaf':true,'children':null,'text':'正镶白旗国土资源局'}," + 
"{'id':152530,'leaf':true,'children':null,'text':'正蓝旗国土资源局'}," + 
"{'id':152531,'leaf':true,'children':null,'text':'多伦县国土资源局'}" + 
"]}," + 
"{'id':152900,'leaf':false,expanded:false,'text':'阿拉善盟国土资源局','children':[" + 
"{'id':152921,'leaf':true,'children':null,'text':'阿拉善左旗国土资源局'}," + 
"{'id':152922,'leaf':true,'children':null,'text':'阿拉善右旗国土资源局'}," + 
"{'id':152923,'leaf':true,'children':null,'text':'额济纳旗国土资源局'}" + 
"]}" + 
"]"; 
context.Response.Write(strTreeNode); 

如此，上面所述的效果就实现了……

声明

本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn

从网站到应用程序：JavaScript的不同应用Apr 22, 2025 am 12:02 AM

JavaScript在网站、移动应用、桌面应用和服务器端编程中均有广泛应用。1)在网站开发中，JavaScript与HTML、CSS一起操作DOM，实现动态效果，并支持如jQuery、React等框架。2)通过ReactNative和Ionic，JavaScript用于开发跨平台移动应用。3)Electron框架使JavaScript能构建桌面应用。4)Node.js让JavaScript在服务器端运行，支持高并发请求。

Python vs. JavaScript：比较用例和应用程序Apr 21, 2025 am 12:01 AM

Python更适合数据科学和自动化，JavaScript更适合前端和全栈开发。1.Python在数据科学和机器学习中表现出色，使用NumPy、Pandas等库进行数据处理和建模。2.Python在自动化和脚本编写方面简洁高效。3.JavaScript在前端开发中不可或缺，用于构建动态网页和单页面应用。4.JavaScript通过Node.js在后端开发中发挥作用，支持全栈开发。

C/C在JavaScript口译员和编译器中的作用Apr 20, 2025 am 12:01 AM

C和C 在JavaScript引擎中扮演了至关重要的角色，主要用于实现解释器和JIT编译器。 1）C 用于解析JavaScript源码并生成抽象语法树。 2）C 负责生成和执行字节码。 3）C 实现JIT编译器，在运行时优化和编译热点代码，显着提高JavaScript的执行效率。

JavaScript在行动中：现实世界中的示例和项目Apr 19, 2025 am 12:13 AM

JavaScript在现实世界中的应用包括前端和后端开发。1)通过构建TODO列表应用展示前端应用，涉及DOM操作和事件处理。2)通过Node.js和Express构建RESTfulAPI展示后端应用。

JavaScript和Web：核心功能和用例Apr 18, 2025 am 12:19 AM

JavaScript在Web开发中的主要用途包括客户端交互、表单验证和异步通信。1)通过DOM操作实现动态内容更新和用户交互；2)在用户提交数据前进行客户端验证，提高用户体验；3)通过AJAX技术实现与服务器的无刷新通信。

了解JavaScript引擎：实施详细信息Apr 17, 2025 am 12:05 AM

理解JavaScript引擎内部工作原理对开发者重要，因为它能帮助编写更高效的代码并理解性能瓶颈和优化策略。1)引擎的工作流程包括解析、编译和执行三个阶段；2)执行过程中，引擎会进行动态优化，如内联缓存和隐藏类；3)最佳实践包括避免全局变量、优化循环、使用const和let，以及避免过度使用闭包。

Python vs. JavaScript：学习曲线和易用性Apr 16, 2025 am 12:12 AM

Python更适合初学者，学习曲线平缓，语法简洁；JavaScript适合前端开发，学习曲线较陡，语法灵活。1.Python语法直观，适用于数据科学和后端开发。2.JavaScript灵活，广泛用于前端和服务器端编程。

Python vs. JavaScript：社区，图书馆和资源Apr 15, 2025 am 12:16 AM

Python和JavaScript在社区、库和资源方面的对比各有优劣。1)Python社区友好，适合初学者，但前端开发资源不如JavaScript丰富。2)Python在数据科学和机器学习库方面强大，JavaScript则在前端开发库和框架上更胜一筹。3)两者的学习资源都丰富，但Python适合从官方文档开始，JavaScript则以MDNWebDocs为佳。选择应基于项目需求和个人兴趣。

See all articles