初步学习EXT,小实例(viewport容器1)

Ext.onReady(function(){
  //构建树形面板的对象
      var tp = new Ext.tree.TreePanel({
          region:'west',
          collapsible:true, //可以让树形面板收缩的
          title:'TreePanel',
          width:200,
          autoScroll:true,
          split:true,  //可以把树形面板拉宽或接窄的
          useArrows:true,//可以让ROOT文件夹旁边有个三角,可以展开和缩起
          enableDD:true, //可以把叶子节点拖动,换位
         // bodyCfg:{cls:'tree_panel_bg'},  //设置树形面板的背景色的
root:new Ext.tree.AsyncTreeNode({
              expanded:true,
              id:'root',
              text:'ROOT',
              children:[{
                  text:'moto',
                  leaf:true
              },{
                  text:'cdma',
                  leaf:true
              },{
                  text:'core',
                  leaf:true
              }]
          }),

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