ExtJs下拉树，选择后如何同时显示父节点和子节点
现在选择只会显示一工班，如何使其显示的是【机电，1号线，一工班】、
网上看的重写树的代码如下,自己不会改动:
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);