此外，你可以定义当用户双击时默认选中的对象。
In addition, you can define the object that is selected by default when the user double taps.
当用户双击其中的错误项时，编辑器就会打开有问题的文件。
When the user double-clicks an entry, the editor opens with the offending file.
当用户双击 selectedStates 控件时，将使用 showDialog 函数显示弹出对话框。
When the user double clicks the selectedStates control, the pop-up dialog is displayed using the showDialog function.
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