如何使用JavaScript以编程方式向现有的TreePanel添加子节点?ExtJS:如何动态添加子节点到treepanel
我有一个显示的地图(使用GeoExt)的活性层的TreePanel中:
treeConfig = new OpenLayers.Format.JSON().write([{
nodeType: "gx_baselayercontainer",
text: "Base layers",
expanded: true
}, {
nodeType: "gx_overlaylayercontainer",
text: "Overlays",
expanded: true,
loader: {
baseAttrs: {
radioGroup: "foo",
uiProvider: "use_radio"
}
}
}], true);
treePanel = new Ext.tree.TreePanel({
id: 'mainpanel',
border: true,
region: "west",
title: "Map layers",
width: 200,
split: true,
collapsible: true,
margins: '0 0 5 5',
collapseMode: "mini",
autoScroll: true,
loader: new Ext.tree.TreeLoader({
applyLoader: false,
uiProviders: {
"use_radio": LayerNodeUI
}
}),
root: {
nodeType: "async",
children: Ext.decode(treeConfig)
},
listeners: {
"radiochange": function(node){
alert(node.layer.name + " is now the the active layer.");
}
},
rootVisible: false,
lines: false
});
的用户应该能够通过按下按钮来添加的覆盖层,但是我似乎无法找到任何关于如何完成这个的例子。
任何想法?
你知道,如果这个工程中的Ext JS 3.4? – 2013-08-19 18:07:40