#
#   Python GUI - Buttons - Generic
#

from GUI.Properties import overridable_property
from GUI.Actions import Action
from GUI import Control

class Button(Control, Action):
    """ A pushbutton control."""
    
    style = overridable_property('style',
        "One of 'normal', 'default', 'cancel'")

    def activate(self):
        """Highlight the button momentarily and then perform its action."""
        self.flash()
        self.do_action()

    def flash(self):
        """Highlight the button momentarily as though it had been clicked,
        without performing the action."""
        raise NotImplementedError