{
  "widgettype": "HBox",
  "options": {
    "width": "100%",
    "height": "100px"
  },
  "subwidgets": [
    {
      "widgettype": "Text",
      "options": {
        "text": "HBox水平布局: ",
        "fontSize": "18px"
      }
    },
    {
      "widgettype": "Button",
      "options": {
        "text": "按钮1"
      }
    },
    {
      "widgettype": "Button", 
      "options": {
        "text": "按钮2"
      }
    },
    {
      "widgettype": "Filler"
    }
  ]
}