... the Portrait option “纵向”选项 the Cancel button “取消”按钮 the File of type list box “文件类型”列表框 ...
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If Zenity exits with code -1, the Cancel button was clicked.
如果Zenity的退出代码是- 1，单击的是Cancel按钮。
This way, we do not need to implement the handler to the Cancel button.
通过这种方式，我们就无需实现Cancel按钮的处理程序。
This works similarly to the cancel button that you saw earlier, transitioning back to the previous page.
其工作方式类似于您之前看到的Cancel按钮，转回到上一页。
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