extjs discussion on the issue of selecting all treePanel chekBox and clearing the selection_extjs

//tree
var treePanel = new Ext.tree.TreePanel ({
id:'ptree',
region:'west',
layout:'anchor',
border:false,
rootVisible: false,
root:{} ,
listeners:{
render: function() {
authorityTree(treePanel); /*render tree*/
},
checkchange: function(node, state) {
if (node.parentNode != null) {
//Select the child node to select the corresponding parent node
var pNode = node.parentNode;
if (state || treePanel.getChecked(id, pNode) == "") {
pNode.ui.toggleCheck(state); // Trigger the parent node to be selected
pNode.attributes.checked = state;
}
}
treeId = node .attributes.id;
treeName = node.attributes.text;
}
}
});
//Action button
tbar: [{
id: ' btnQingKong',
text: 'clear',
iconCls: 'winupdate-icon',
handler: function() {
var nodes = Ext.getCmp('ptree').getChecked() ;
if (nodes && nodes.length) {
for (var i = 0; i < nodes.length; i ) {
//Set the UI status to unselected
nodes[ i].getUI().toggleCheck(false);
//Set node attributes to unchecked state
nodes[i].attributes.checked = false;
}
}
}
},{
id: 'btnQuanXuan',
text: 'Select all',
iconCls: 'winupdate-icon',
handler: function() {
var nodeT = Ext.getCmp('ptree').getRootNode();
treeCheckTrue(nodeT);
}
}]
/**
*checkTree select all
*/
var treeCheckTrue = function( node)
{
node.eachChild(function (child) {
child.getUI().toggleCheck(true);
child.attributes.checked = true;
treeCheckTrue(child) ;
});
}
/**
*checkTree clear
*/
var treeCheckfalse = function(tree)
{
var nodes = tree.getChecked();
if(nodes && nodes.length){
for(var i=0;i//Set the UI status to unselected
nodes[i].getUI ().toggleCheck(false);
//Set node attributes to unchecked state
nodes[i].attributes.checked=false;
}
}
}