text: Ext.application({
      name: 'TouchStart',
      launch: function() {
          var eventPanel = Ext.create('Ext.Panel', {
              fullscreen: true,
              layout: 'auto',
              items: [{
                  xtype: 'container',
                  width: 40,
                  height: 40,
                  id: 'tapTarget',
                  style: 'background-color: #800000;'
              }],
              listeners: {
                  singletap: {
                      element: 'element',
                      fn: function(event, div, listener) {
                          console.log(event);
                          var cmp = Ext.getCmp('tapTarget');
                          cmp.setWidth(event.pageX);
                          cmp.setHeight(event.pageY);
                          console.log(event.pageX, event.pageY);
  
                      }
                  }
              }
          });
  
          Ext.Viewport.add(eventPanel);
      }
  });
  