def __init__(self, text="", window=None, batch=None, group=None,
theme=None, on_escape=None, have_focus=False):
def on_ok(_):
if on_escape is not None:
on_escape(self)
self.delete()
button = FocusButton("Ok", on_press=on_ok)
Manager.__init__(self, content=Frame(VerticalContainer(
[Label(text), button])),
window=window, batch=batch, group=group,
theme=theme, is_movable=True)
Manager.set_next_focus(self, 1)
