+ self.rectOff = rect
+
+ topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION)
+ bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION)
+ rectOn = rect.inflate(ON_COLUMN_OVERSIZING * rect.width, 0)
+ self.stateOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
+ self.rectOn = rectOn
+
+ self.image = self.stateOff
+ self.rect = rect
+
+ def update(self, state) :
+ if state :
+ self.image = self.stateOn
+ self.rect = self.rectOn
+ else :
+ self.image = self.stateOff
+ self.rect = self.rectOff
+
+ @event_handler(pygame.MOUSEBUTTONDOWN)
+ def onMouseDown(self, event) :
+ if self.rect.collidepoint(*event.pos) :
+ self.update(True)
+
+ @event_handler(pygame.MOUSEBUTTONUP)
+ def onMouseUp(self, event) :
+ self.update(False)