title: How to set ExtJS window show/hide with animation?
body: <p>Here is My sourcecode:</p>
  
  <pre>
  Ext.create('Ext.window.Window', {
      id:'edit_segtype_win',
      title:'msg',
      layout: 'fit',
      html:data,
      modal:true,
      resizable:false,
      constrain:true
  }).show(undefined,bind_ajax_success);
  </pre>
  
  <p>When i call show(...),the window will show without any animation.
  I want to add some animation,such as fadein/fadeout/slidein/slideout.
  Can somebody help me? Thank you!</p>