刚好项目需要用到在ExtJS的ComboBox组件中实现下拉树效果GOOGLE 就是好用 下面是我找的博文
看了很多关于EXT下拉树的实现, 发现很多例子都是对EXT原有的类进行扩展, 而且都发现用起来很费劲,在这里,本人实现的EXT下拉树是直接使用 Ext.form.ComboBox + Ext.tree.TreePanel, 将两者结合起来,不需要额外的扩展
效果可见附件一
JS代码如下:
var comboxWithTree = new Ext.form.ComboBox({
store:new Ext.data.SimpleStore({fields:[],data:[[]]}),
editable:false,
mode: 'local',
triggerAction:'all',
maxHeight: 200,
tpl: "<tpl for='.'><div style='height:200px'><div id='tree'></div></div></tpl>",
selectedClass:'',
onSelect:Ext.emptyFn
});
var tree = new Ext.tree.TreePanel({
loader: new Ext.tree.DWRTreeLoader({dwrCall:Tmplt.getTmpltTree}),
border:false,
root:new Ext.tree.AsyncTreeNode({text: '模板根目录',id:'0'})
});
tree.on('click',function(node){
comboxWithTree.setValue(node.text);
comboxWithTree.collapse();
});
comboxWithTree.on('expand',function(){
tree.render('tree');
});
comboxWithTree.render('comboxWithTree');
store:new Ext.data.SimpleStore({fields:[],data:[[]]}),
editable:false,
mode: 'local',
triggerAction:'all',
maxHeight: 200,
tpl: "<tpl for='.'><div style='height:200px'><div id='tree'></div></div></tpl>",
selectedClass:'',
onSelect:Ext.emptyFn
});
var tree = new Ext.tree.TreePanel({
loader: new Ext.tree.DWRTreeLoader({dwrCall:Tmplt.getTmpltTree}),
border:false,
root:new Ext.tree.AsyncTreeNode({text: '模板根目录',id:'0'})
});
tree.on('click',function(node){
comboxWithTree.setValue(node.text);
comboxWithTree.collapse();
});
comboxWithTree.on('expand',function(){
tree.render('tree');
});
comboxWithTree.render('comboxWithTree');
这里的使用了Ext.tree.DWRTreeLoader 调用后台方法读取结点, 和下拉树的实现本身没任何关系,你可以使用任何的loader去加载树结点,需要注意的是,ComboBox的tpl里的<div id='tree'>这个ID可以改成别的, 但必须要在'expand'事件里, 将树显示在这个div上
就是如此简单...
看到这里,聪明的读者就会想到,如此类推,想在下拉表里放任何东西都是可以的,以下例子放一个Panel,
效果图见附件二
js代码如下:
var comboxWithPanel = new Ext.form.ComboBox({
store:new Ext.data.SimpleStore({fields:[],data:[[]]}),
editable:false,
mode: 'local',
triggerAction:'all',
maxHeight: 200,
tpl: '<div style="height:200px"><div id="panel"></div></div>',
selectedClass:'',
onSelect:Ext.emptyFn
});
comboxWithPanel.render('comboxWithPanel');
var tree2 = new Ext.tree.TreePanel({
loader: new Ext.tree.DWRTreeLoader({dwrCall:Tmplt.getTmpltTree}),
border:false,
autoScroll:true,
root:new Ext.tree.AsyncTreeNode({text: '模板根目录',id:'0'})
});
var border = new Ext.Panel({
title:'面板title',
layout:'fit',
border:false,
height :200,
tbar:[{text:'确定一'},'-',new Ext.form.TextField({id: 'paramCnName',width:60}),{text:'查找一'}],
bbar:[{text:'确定二'},'-',new Ext.form.TextField({id: 'aa',width:60}),{text:'查找二'}],
items: tree2
});
comboxWithPanel.on('expand',function(){
border.render('panel');
});
store:new Ext.data.SimpleStore({fields:[],data:[[]]}),
editable:false,
mode: 'local',
triggerAction:'all',
maxHeight: 200,
tpl: '<div style="height:200px"><div id="panel"></div></div>',
selectedClass:'',
onSelect:Ext.emptyFn
});
comboxWithPanel.render('comboxWithPanel');
var tree2 = new Ext.tree.TreePanel({
loader: new Ext.tree.DWRTreeLoader({dwrCall:Tmplt.getTmpltTree}),
border:false,
autoScroll:true,
root:new Ext.tree.AsyncTreeNode({text: '模板根目录',id:'0'})
});
var border = new Ext.Panel({
title:'面板title',
layout:'fit',
border:false,
height :200,
tbar:[{text:'确定一'},'-',new Ext.form.TextField({id: 'paramCnName',width:60}),{text:'查找一'}],
bbar:[{text:'确定二'},'-',new Ext.form.TextField({id: 'aa',width:60}),{text:'查找二'}],
items: tree2
});
comboxWithPanel.on('expand',function(){
border.render('panel');
});
附件一:
附件二:
- 1楼Tender001前天 21:00
- from:http://www.iteye.com/topic/164424