def __init__(self, root: Gtk.Window, text: str,
ok_button_text: str = Gtk.STOCK_OK,
cancel_button_text: str = Gtk.STOCK_CANCEL,
header: str = '',
message_type: Gtk.MessageType = Gtk.MessageType.WARNING):
Gtk.MessageDialog.__init__(self, root, 0, message_type=message_type)
self.set_title(header)
self.icon = Gtk.Image()
self.icon.set_from_icon_name(appropriate_icon(message_type), Gtk.IconSize.LARGE_TOOLBAR)
self.text = Gtk.Label(text)
heading = Gtk.Box()
heading.add(self.icon)
heading.add(self.text)
self.get_message_area().add(heading)
self.get_message_area().set_spacing(0)
self.add_button(cancel_button_text, Gtk.ResponseType.CANCEL)
self.add_button(ok_button_text, Gtk.ResponseType.OK)
self.show_all()
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