def __init__(self, parent=None, width=5, height=5, dpi=75):
self.fig = Figure(figsize=(width, height), dpi=dpi)
super(MplCanvas, self).__init__(self.fig)
color = QPalette().color(QPalette.Light)
self.fig.patch.set_color(
(color.red() / 255., color.green() / 255., color.blue() / 255.))
