Base dialog for user notification. This dialog is useful for small notifications to the user about an event. It can only be accepted or closed, with the same result. Add custom button to the dialog and return the created button. The button titled with [i]text[/i] and the [i]action[/i] will be passed to [custom_action] signal when it is pressed. Add custom cancel button to the dialog and return the created button. Return true if the dialog will be hidden when accepted (default true). Return the label used for built-in text. Return the OK Button. Return the built-in label text. Register a [LineEdit] in the dialog. When the enter key is pressed, the dialog will be accepted. Set whether the dialog is hidden when accepted (default true). Set the built-in label text. Emitted when accepted. Emitted with a custom button is added.