def add_plot(self, iplt, irow, icol):
widget = ImageWidget(self, "Plot #%d" % (iplt + 1))
widget.setMinimumSize(200, 150)
xdata = np.linspace(-10, 10)
ydata = np.sin(xdata + np.random.randint(0, 100) * 0.01 * np.pi)
curve_item = make.curve(xdata, ydata, color="b")
widget.plot.add_item(curve_item)
self.layout().addWidget(widget, irow, icol, 1, 1)
