Extjs4.x Ext.tree.Panel 过滤Filter以及trigger field的使用

Extjs4.x中已经取消了组件Ext.Tree.TreeFilter功能，却掉了树形结构的过滤功能，要实现该功能只能自己写了.





Tree节点筛选UI很简单，一个Tbar，一个trigger即可解决问题，剩下的是逻辑代码了。

1.tbar没啥好解析的

2.trigger几个比较重要的属性

　　triggerCls：文本框右侧的按钮样式，主要有4种　　

x-form-clear-trigger     // the X icon
x-form-search-trigger    // the magnifying glass icon
x-form-trigger           // the down arrow (default for combobox) icon
x-form-date-trigger      // the calendar icon (just in case)

　　onTriggerClick：单击右侧按钮的事件

　　emptyText：值为空时候显示的文字

　　hideTrigger：是否显示触发按钮

　　更多请参考：http://docs.sencha.com/extjs/4.2.1/#!/api/Ext.form.field.Trigger-cfg-hideTrigger

3.剩下最重要的一个是逻辑处理类

完整的案例代码如下:

Ext.define("WMS.view.Tree", {
extend: 'Ext.tree.Panel',
alias: 'widget.wmsTree',
id: 'wmsMenuTreePanel',
title: "功能导航",
margins: '0 0 0 3',
width: 200,
region: 'west',
animate: true,
store: 'VPTreeMenu',
autoScroll: true,
rootVisible: false,
loadMsg: true,
collapsible: true,//是否可以折叠
split: true,
tools: [{
type: 'expand',
handler: function () { Ext.getCmp("wmsMenuTreePanel").expandAll(); }
}, {
type: 'collapse',
handler: function () { Ext.getCmp("wmsMenuTreePanel").collapseAll(); }
}],
　　//这里不要忘记
mixins: {
treeFilter: 'WMS.view.TreeFilter'
},
tbar: [{
xtype: 'trigger',
triggerCls: 'x-form-clear-trigger',
onTriggerClick: function () {
this.setValue('');
Ext.getCmp("wmsMenuTreePanel").clearFilter();
},
width:'100%',
emptyText:'快速检索功能',
enableKeyEvents: true,
listeners: {
keyup: {
fn: function (field, e) {
if (Ext.EventObject.ESC == e.getKey()) {
field.onTriggerClick();
} else {
Ext.getCmp("wmsMenuTreePanel").filterByText(this.getRawValue());
}
}
}
}
}]
});

　　

/**
* Add basic filtering to Ext.tree.Panel. Add as a mixin:
*  mixins: {
*      treeFilter: 'WMS.view.TreeFilter'
*  }
*/
Ext.define('WMS.view.TreeFilter', {
filterByText: function(text) {
this.filterBy(text, 'text');
},
/**
* Filter the tree on a string, hiding all nodes expect those which match and their parents.
* @param The term to filter on.
* @param The field to filter on (i.e. 'text').
*/
filterBy: function(text, by) {
this.clearFilter();
var view = this.getView(),
me = this,
nodesAndParents = [];
// Find the nodes which match the search term, expand them.
// Then add them and their parents to nodesAndParents.
this.getRootNode().cascadeBy(function(tree, view){
var currNode = this;

if(currNode && currNode.data[by] && currNode.data[by].toString().toLowerCase().indexOf(text.toLowerCase()) > -1) {
me.expandPath(currNode.getPath());
while(currNode.parentNode) {
nodesAndParents.push(currNode.id);
currNode = currNode.parentNode;
}
}
}, null, [me, view]);
// Hide all of the nodes which aren't in nodesAndParents
this.getRootNode().cascadeBy(function(tree, view){
var uiNode = view.getNodeByRecord(this);
if(uiNode && !Ext.Array.contains(nodesAndParents, this.id)) {
Ext.get(uiNode).setDisplayed('none');
}
}, null, [me, view]);
},
clearFilter: function() {
var view = this.getView();
this.getRootNode().cascadeBy(function(tree, view){
var uiNode = view.getNodeByRecord(this);
if(uiNode) {
Ext.get(uiNode).setDisplayed('table-row');
}
}, null, [this, view]);
}
});

　如果你想对节点的中文做些处理，例如按照拼音首字母进行搜索，只需要变更如下这句代码即可

currNode.data[by].toString().toLowerCase().indexOf(text.toLowerCase()) > -1

更多扩展，可以自己修改类 WMS.view.TreeFilter