如何多次显示使用 Glade 定义的对话框？

Question

我想多次显示在 Glade 文件中定义的 Gtk.Dialog。

目前我可以使用自定义按钮来调用对话框的hide() 方法，但是，如果用户使用 Alt+F4 关闭对话框，它重新打开为空：

在控制台中我看到多个错误：

(main.py:29152): Gtk-CRITICAL **: 15:28:29.637: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: _gtk_container_get_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: gtk_container_set_border_width: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: _gtk_container_set_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: _gtk_box_get_spacing_set: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: gtk_box_set_spacing: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: _gtk_box_set_spacing_set: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: gtk_button_box_get_layout: assertion 'GTK_IS_BUTTON_BOX (widget)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: gtk_box_set_spacing: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: _gtk_container_get_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: gtk_container_set_border_width: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.651: _gtk_container_set_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: _gtk_container_get_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: gtk_container_set_border_width: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: _gtk_container_set_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: _gtk_box_get_spacing_set: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: gtk_box_set_spacing: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: _gtk_box_set_spacing_set: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: gtk_button_box_get_layout: assertion 'GTK_IS_BUTTON_BOX (widget)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: gtk_box_set_spacing: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: _gtk_container_get_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: gtk_container_set_border_width: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:29.697: _gtk_container_set_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: _gtk_container_get_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: gtk_container_set_border_width: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: _gtk_container_set_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: _gtk_box_get_spacing_set: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: gtk_box_set_spacing: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: _gtk_box_set_spacing_set: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: gtk_button_box_get_layout: assertion 'GTK_IS_BUTTON_BOX (widget)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: gtk_box_set_spacing: assertion 'GTK_IS_BOX (box)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: _gtk_container_get_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: gtk_container_set_border_width: assertion 'GTK_IS_CONTAINER (container)' failed

(main.py:29152): Gtk-CRITICAL **: 15:28:31.141: _gtk_container_set_border_width_set: assertion 'GTK_IS_CONTAINER (container)' failed

我正在使用普通的get_object() 获取对话框实例：

 self.__settings_dialog : Gtk.Dialog = self.__builder.get_object("settings_dialog")

不仅仅是打电话给show() 和hide()。但是用 Alt+F4 关闭它后，我无法再次显示它。

Answer 1

感谢a Reddit user，我发现您必须连接到对话框的delete-event 并确保返回True 以避免对话框被破坏。

首先在 Glade 中创建信号处理程序，然后在您的 Python 代码中：

def on_dialog_delete_event(self, dialog, event):
    dialog.hide()
    return True