def draw(self, ctx):
ctx.save()
ctx.save()
ctx.set_font_size(self.labelFontSize * 10)
ascent, descent, height, max_x_advance, max_y_advance = ctx.font_extents()
ctx.move_to(0, ascent)
ctx.show_text(self.label)
ctx.restore()
ctx.translate(0, ascent + descent + 5)
drawer = Drawer(ctx)
r, u, d = self.node.getExtents(drawer)
ctx.translate(0, u)
drawer.drawStart()
self.node.draw(drawer)
drawer.drawStop()
ctx.restore()
