Drawing in a matplotlib widget in QtDesigner

Question

I created in QtDesigner this QDialog:

I would like to know how can I draw something in this Matplotlib widget that I put there. I mean, if I write some code to create a matplotlib figure without Qt Designer, I can write something like:

self.figure_canvas = FigureCanvas(Figure())

self.axes = self.figure_canvas.figure.add_subplot(111)

x = np.arange(0,5,0.5)
y = np.sin(x)

and then draw doing:

ax.plot(x,y) or self.axes.plot(x,y)

How can I access to this widget to draw something? Hope you can help me.

Answer 1

Based on the screenshot that you have provided, it seems that the MatplotlibWidget should be accessible as self.matplotlibwidget from within your QMainWindow class. This is because of the value listed in the "Object" column of the Object Inspector.

You can use this object directly to add plots to your GUI.

self.matplotlibwidget.axes.plot(x, y)