{
  "widgettype": "HScrollPanel",
  "options": {
    "width": "300px", 
    "height": "100px"
  },
  "subwidgets": [
    {
      "widgettype": "HBox",
      "subwidgets": [
        {"widgettype": "Text", "options": {"text": "水平滚动内容 - "}},
        {"widgettype": "Text", "options": {"text": "水平滚动内容 - ".repeat(50)}}
      ]
    }
  ]
}