'What to do when press a mouse button over the Pomodoro widget.
LEFT BUTTON: pause/resume current status or start
RIGHT BUTTON: toggle activity'

def button_press(self, x, y, button):

    if (button == 1):
        self._toggle_break()
    elif (button == 3):
        self._toggle_active()
    base.ThreadedPollText.button_press(self, x, y, button)
