This function shows self to the user.
The callback will be called when the alert is dismissed. It should call adw.alert_dialog.AlertDialog.chooseFinish to obtain the result.
If the window is an classWindow or classApplicationWindow, the dialog will be shown within it. Otherwise, it will be a separate window.
the parent widget
a gio.cancellable.Cancellable to cancel the operation
a callback to call when the operation is complete
This function shows self to the user.
The callback will be called when the alert is dismissed. It should call adw.alert_dialog.AlertDialog.chooseFinish to obtain the result.
If the window is an classWindow or classApplicationWindow, the dialog will be shown within it. Otherwise, it will be a separate window.