<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def event(self, event):
 """Reimplementation of QWidget.event The widget is closed, when the window is deactivated. The widget is closed after the set interval if the mouse leaves the widget. The timer is stops when the mouse enters the widget before the interval ends. On show, the added widgets are rendered for the tooltip into buttons. The buttons are used to set the widget in focus. """

        if event.type() == QtCore.QEvent.WindowDeactivate:  # hide the tooltip
            self.cyatimer.stop()
            self.hide()
            return True
        if event.type() == QtCore.QEvent.Leave:  # start timer
            self.cyatimer.start(self._interval)
            return True
        if event.type() == QtCore.QEvent.Enter:  # reset/stop timer
            self.cyatimer.stop()
            return True
        if event.type() == QtCore.QEvent.Show:  # render the widgets
            self.cyatimer.stop()
            return True
        return super(WidgetToolTip, self).event(event)