當通過Gtk＃窗口調用DeleteEvent時，如何防止窗口關閉？

Question

當窗口關閉時，用戶被要求保存他們編輯的文件。他們也可以選擇取消退出申請。

在WPF我可以CancelEventArgs.Cancel屬性設置爲true來做到這一點。在Gtk＃中有等效/解決方法嗎？

Answer 1

您需要將DeleteEventArgs.RetVal設置爲true，而不是false。從relevant Mono documentation：

爲了保持Gtk.Window從封閉，設置Gtk.DeleteEventHandler的Gtk.DeleteEventArgs.RetVal到true。

Answer 2

從快速谷歌搜索發現，這條巨蟒的例子（link）：

# When the window is requested to be closed, we need to check if they have 
# unsaved work. We use this callback to prompt the user to save their work 
# before they exit the application. From the "delete-event" signal, we can 
# choose to effectively cancel the close based on the value we return. 
def on_window_delete_event(self, widget, event, data=None): 

    if self.check_for_save(): self.on_save_menu_item_activate(None, None) 
    return False # Propogate event 

希望這有助於。