Drop-down box tree effect implemented by ComboBoxTree in Extjs (self-written)_extjs

In a project recently involved, it is necessary to achieve the effect of ComboBoxTree. First, let’s take a look at the effect...

There is no such effect in Extjs, so I have to write it myself and watch it on the Internet. After looking at other people’s information, I summarized it myself and modified it. The code is as follows:

Copy the code The code is as follows:

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: [[]]
}),
// Rewrite onViewClick so that expanding the tree node does not close the drop-down box
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,
// hidden value
hiddenValue: null,
getHiddenValue: function () {
return this.hiddenValue;
},
getValue: function () { //Increase applicability, same as the original combo component
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);

After that, add the Extjs class library

Copy code The code is as follows:

Among them, the code of login.js is as follows:

Copy code The code is as follows:

/* File Created: May 27, 2013 */
Ext.onReady(function () {
var _window = new Ext.Window({
title: "Query Condition" ,
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: "Case Number",
anchor: "100%"
},
{
xtype: "datefield",
fieldLabel: "time of incident",
anchor: "100%"
},
{
fieldLabel: "reporter ",
anchor: "100%"
},
{
fieldLabel: "Reported unit or individual",
anchor: "100%"
},
{
xtype: "treecombo",
fieldLabel: "Where the case occurred",
anchor: "100%",
url: "http://localhost:1502/treeData.ashx"/ //
},
{
xtype: "treecombo",
fieldLabel: "case type",
anchor : "100%",
url: "http://localhost:1502/window/ajwflx.ashx"
},
{
xtype: "treecombo",
fieldLabel: " Nature of the case",
anchor: "100%",
url: "http://localhost:1502/window/ajwfxz.ashx"
}
],
buttons: [{ text: "OK" }, { text: "Cancel", handler: function () { _window.hide(); } }]
})
_window.show();
})

The content of treedata.ashxd is:

Copy code The code is as follows:

string strTreeNode = "["
"{'id':150100,'leaf':false,expanded:false,'text':'Hohhot Land and Resources Bureau','children':[ "
"{'id':150101,'leaf':true,'children':null,'text':'Municipal District Land and Resources Bureau'},"
"{'id':150102,' leaf':true,'children':null,'text':'Xincheng District Land and Resources Bureau'},"
"{'id':150103,'leaf':true,'children':null,'text ':'Huimin District Land and Resources Bureau'},"
"{'id':150104,'leaf':true,'children':null,'text':'Yuquan District Land and Resources Bureau'},"
"{'id':150105,'leaf':true,'children':null,'text':'Saihan District Land and Resources Bureau'},"
"{'id':150121,'leaf ':true,'children':null,'text':'Tumut Left Banner Land and Resources Bureau'},"
"{'id':150122,'leaf':true,'children':null, 'text':'Toketuo County Land and Resources Bureau'},"
"{'id':150123,'leaf':true,'children':null,'text':'Helinger County Land Resources Bureau'},"
"{'id':150124,'leaf':true,'children':null,'text':'Qingshuihe County Land and Resources Bureau'},"
"{' id':150125,'leaf':true,'children':null,'text':'Wuchuan County Land and Resources Bureau'}"
"]},"
"{'id':150200,' leaf':false,expanded:false,'text':'Baotou City Land and Resources Bureau','children':["
"{'id':150201,'leaf':true,'children':null, 'text':'Municipal District Land and Resources Bureau'},"
"{'id':150202,'leaf':true,'children':null,'text':'Donghe District Land and Resources Bureau'} ,"
"{'id':150203,'leaf':true,'children':null,'text':'Kundulun District Land and Resources Bureau'},"
"{'id': 150204,'leaf':true,'children':null,'text':'Qingshan District Land and Resources Bureau'},"
"{'id':150205,'leaf':true,'children':null ,'text':'Shiguai District Land and Resources Bureau'},"
"{'id':150206,'leaf':true,'children':null,'text':'Baiyun Mining District Land and Resources Bureau' },"
"{'id':150207,'leaf':true,'children':null,'text':'Jiuyuan District Land and Resources Bureau'},"
"{'id': 150221,'leaf':true,'children':null,'text':'Tumut Right Banner Land and Resources Bureau'},"
"{'id':150222,'leaf':true,'children ':null,'text':'Guyang County Land and Resources Bureau'},"
"{'id':150223,'leaf':true,'children':null,'text':'Darkhan Maoming Anlian United Banner Land and Resources Bureau'}"
"]},"
"{'id':150300,'leaf':false,expanded:false,'text':'Wuhai City Land and Resources Bureau' ,'children':["
"{'id':150301,'leaf':true,'children':null,'text':'Municipal District Land and Resources Bureau'},"
"{' id':150302,'leaf':true,'children':null,'text':'Haibo Bay District Land and Resources Bureau'},"
"{'id':150303,'leaf':true, 'children':null,'text':'Hainan District Land and Resources Bureau'},"
"{'id':150304,'leaf':true,'children':null,'text':'Wuda District Land and Resources Bureau'}"
"]},"
"{'id':150400,'leaf':false,expanded:false,'text':'Chifeng City Land and Resources Bureau','children ':["
"{'id':150401,'leaf':true,'children':null,'text':'Municipal District Land and Resources Bureau'},"
"{'id': 150402,'leaf':true,'children':null,'text':'Hongshan District Land and Resources Bureau'},"
"{'id':150403,'leaf':true,'children':null ,'text':'Yuanbaoshan District Land and Resources Bureau'},"
"{'id':150404,'leaf':true,'children':null,'text':'Songshan District Land and Resources Bureau'} ,"
"{'id':150421,'leaf':true,'children':null,'text':'Aruhorqin Banner Land and Resources Bureau'},"
"{'id': 150422,'leaf':true,'children':null,'text':'Bahrain Left Banner Land and Resources Bureau'},"
"{'id':150423,'leaf':true,'children': null,'text':'Bahrain Right Banner Land and Resources Bureau'},"
"{'id':150424,'leaf':true,'children':null,'text':'Linxi County Land and Resources Bureau'},"
"{'id':150425,'leaf':true,'children':null,'text':'Keshiketeng Banner Land and Resources Bureau'},"
"{ 'id':150426,'leaf':true,'children':null,'text':'Wengniute Banner Land and Resources Bureau'},"
"{'id':150428,'leaf':true ,'children':null,'text':'Haraqin Banner Land and Resources Bureau'},"
"{'id':150429,'leaf':true,'children':null,'text': 'Ningcheng County Land and Resources Bureau'},"
"{'id':150430,'leaf':true,'children':null,'text':'Aohan Banner Land and Resources Bureau'}"
"]},"
"{'id':150500,'leaf':false,expanded:false,'text':'Tongliao Municipal Bureau of Land and Resources','children':["
"{ 'id':150501,'leaf':true,'children':null,'text':'Municipal District Land and Resources Bureau'},"
"{'id':150502,'leaf':true,' children':null,'text':'Horqin District Land and Resources Bureau'},"
"{'id':150521,'leaf':true,'children':null,'text':'Horqin Left Wing Center Banner Land and Resources Bureau'},"
"{'id':150522,'leaf':true,'children':null,'text':'Horqin Left-wing Hou Banner Land and Resources Bureau'},"
"{'id':150523,'leaf':true,'children':null,'text':'Kailu County Land and Resources Bureau'},"
"{'id':150524,'leaf': true,'children':null,'text':'Kulun Banner Land and Resources Bureau'},"
"{'id':150525,'leaf':true,'children':null,'text':' Naiman Banner Land and Resources Bureau'},"
"{'id':150526,'leaf':true,'children':null,'text':'Zalut Banner Land and Resources Bureau'},"
" {'id':150581,'leaf':true,'children':null,'text':'Holingol City Land and Resources Bureau'}"
"]},"
"{'id ':150600,'leaf':false,expanded:false,'text':'Ordos Land and Resources Bureau','children':["
"{'id':150602,'leaf':true,' children':null,'text':'Dongsheng District Land and Resources Bureau'},"
"{'id':150621,'leaf':true,'children':null,'text':'Dala Special Banner Land and Resources Bureau'},"
"{'id':150622,'leaf':true,'children':null,'text':'Zhungar Banner Land and Resources Bureau'},"
"{'id':150623,'leaf':true,'children':null,'text':'Otok Qian Banner Land and Resources Bureau'},"
"{'id' :150624,'leaf':true,'children':null,'text':'Otuoke Banner Land and Resources Bureau'},"
"{'id':150625,'leaf':true,'children ':null,'text':'Hangjin Banner Land and Resources Bureau'},"
"{'id':150626,'leaf':true,'children':null,'text':'Wushen Banner Land Resources Bureau'},"
"{'id':150627,'leaf':true,'children':null,'text':'Ejinholo Banner Land and Resources Bureau'}"
"] },"
"{'id':150700,'leaf':false,expanded:false,'text':'Hulunbuir City Land and Resources Bureau','children':["
"{'id' :150701,'leaf':true,'children':null,'text':'Municipal District Land and Resources Bureau'},"
"{'id':150702,'leaf':true,'children': null,'text':'Hailaer District Land and Resources Bureau'},"
"{'id':150721,'leaf':true,'children':null,'text':'Arong Banner Land and Resources Bureau'} ,"
"{'id':150722,'leaf':true,'children':null,'text':'Moridawa Daur Autonomous Banner Land and Resources Bureau'},"
"{ 'id':150723,'leaf':true,'children':null,'text':'Oroqen Autonomous Banner Land and Resources Bureau'},"
"{'id':150724,'leaf':true, 'children':null,'text':'Ewenki Autonomous Banner Land and Resources Bureau'},"
"{'id':150725,'leaf':true,'children':null,'text':' Chen Barhu Banner Land and Resources Bureau'},"
"{'id':150726,'leaf':true,'children':null,'text':'New Barhu Left Banner Land and Resources Bureau'}, "
"{'id':150727,'leaf':true,'children':null,'text':'New Barhu Right Banner Land and Resources Bureau'},"
"{'id': 150781,'leaf':true,'children':null,'text':'Manzhouli Land and Resources Bureau'},"
"{'id':150782,'leaf':true,'children':null ,'text':'Yakeshi City Land and Resources Bureau'},"
"{'id':150783,'leaf':true,'children':null,'text':'Zhalantun City Land and Resources Resources Bureau'},"
"{'id':150784,'leaf':true,'children':null,'text':'Ergun City Land and Resources Bureau'},"
" {'id':150785,'leaf':true,'children':null,'text':'Genhe City Land and Resources Bureau'}"
"]},"
"{'id': 150800,'leaf':false,expanded:false,'text':'Bayannur City Land and Resources Bureau','children':["
"{'id':150801,'leaf':true,' children':null,'text':'Municipal District Land and Resources Bureau'},"
"{'id':150802,'leaf':true,'children':null,'text':'Linhe District Land and Resources Resources Bureau'},"
"{'id':150821,'leaf':true,'children':null,'text':'Wuyuan County Land and Resources Bureau'},"
"{' id':150822,'leaf':true,'children':null,'text':'Dengkou County Land and Resources Bureau'},"
"{'id':150823,'leaf':true,' children':null,'text':'Urad Front Banner Land and Resources Bureau'},"
"{'id':150824,'leaf':true,'children':null,'text':'Urad Tezhong Banner Land and Resources Bureau'},"
"{'id':150825,'leaf':true,'children':null,'text':'Uradhou Banner Land and Resources Bureau'},"
"{'id':150826,'leaf':true,'children':null,'text':'Hangjinhouqi Land and Resources Bureau'}"
"]},"
"{'id' :150900,'leaf':false,expanded:false,'text':'Ulanqab City Land and Resources Bureau','children':["
"{'id':150901,'leaf':true ,'children':null,'text':'Municipal District Land and Resources Bureau'},"
"{'id':150902,'leaf':true,'children':null,'text':'set Ning District Land and Resources Bureau'},"
"{'id':150921,'leaf':true,'children':null,'text':'Zhuozi County Land and Resources Bureau'},"
"{'id':150922,'leaf':true,'children':null,'text':'Huade County Land and Resources Bureau'},"
"{'id':150923,'leaf': true,'children':null,'text':'Shangdu County Land and Resources Bureau'},"
"{'id':150924,'leaf':true,'children':null,'text':' Xinghe County Land and Resources Bureau'},"
"{'id':150925,'leaf':true,'children':null,'text':'Liangcheng County Land and Resources Bureau'},"
"{'id':150926,'leaf':true,'children':null,'text':'Chahar Right Front Banner Land and Resources Bureau'},"
"{'id':150927, 'leaf':true,'children':null,'text':'Chahar Right Middle Banner Land and Resources Bureau'},"
"{'id':150928,'leaf':true,'children' :null,'text':'Chahar Right Back Banner Land and Resources Bureau'},"
"{'id':150929,'leaf':true,'children':null,'text':'Siziwang Banner Bureau of Land and Resources'},"
"{'id':150981,'leaf':true,'children':null,'text':'Fengzhen Municipal Bureau of Land and Resources'}"
"]} ,"
"{'id':152200,'leaf':false,expanded:false,'text':'Xing'an League Land and Resources Bureau','children':["
"{'id': 152201,'leaf':true,'children':null,'text':'Ulanhot Land and Resources Bureau'},"
"{'id':152202,'leaf':true,'children':null ,'text':'Aershan City Land and Resources Bureau'},"
"{'id':152221,'leaf':true,'children':null,'text':'Horqin Right Front Banner Land and Resources Bureau'},"
"{'id':152222,'leaf':true,'children':null,'text':'Horqin Right Wing Middle Banner Land and Resources Bureau'},"
"{' id':152223,'leaf':true,'children':null,'text':'Zhalaite Banner Land and Resources Bureau'},"
"{'id':152224,'leaf':true, 'children':null,'text':'Tuquan County Land and Resources Bureau'}"
"]},"
"{'id':152500,'leaf':false,expanded:false,' text':'Xilingol League Land and Resources Bureau','children':["
"{'id':152501,'leaf':true,'children':null,'text':'Erenhot City Land and Resources Bureau '},"
"{'id':152502,'leaf':true,'children':null,'text':'Xilinhot City Land and Resources Bureau'},"
"{'id': 152522,'leaf':true,'children':null,'text':'Abaga Banner Land and Resources Bureau'},"
"{'id':152523,'leaf':true,'children' :null,'text':'Sunit Left Banner Land and Resources Bureau'},"
"{'id':152524,'leaf':true,'children':null,'text':'Sunit Right Banner Land and Resource Bureau'},"
"{'id' : 152525,'leaf':true,'children':null,'text':'東ウジムチンバナー土地資源局'},"
"{'id':152526,'leaf':true, 'children' :null,'text':'西ウジムチンバナー土地資源局'},"
"{'id':152527,'leaf':true,'children':null,'text' :'タイプシバナーランドおよび資源局'},"
"{'id':152528,'leaf':true,'children':null,'text':'仙皇バナー土地資源局'},"
"{ 'id':152529,'leaf':true,'children':null,'text':'鄭祥白旗土地資源局'},"
"{'id':152530,'leaf': true,' Children':null,'text':'正蘭バナー土地資源局'},"
"{'id':152531,'leaf':true,'children':null,'text': '多潤県土地資源局'}"
"]},"
"{'id':152900,'leaf':false,expanded:false,'text':'アルクサリーグ土地資源局 ', 'children':["
"{'id':152921,'leaf':true,'children':null,'text':'アルクサ レフト バナー土地資源局'},"
"{ 'id':152922,'leaf':true,'children':null,'text':'アルクサ右バナー土地資源局'},"
"{'id':152923,'leaf' : true,'children':null,'text':'エジナバナー土地資源局'}"
"]}"
"]";
context.Response.Write(strTreeNode);

このようにして、上記の効果が達成されます...