[Python] Plot a figure on a canvas

I am using Qt Designer and matplotlib for plotting.

So far, I've promoted a Qwidget to a Canvas class and draw my plots on it by creating axes and plotting them with figure.add_subplot(), so code looks this way:

ax = self.canvas.figure.add_subplot(111)

ax.plot(data)

self.canvas.draw()


But now I have a figure object and I need to plot it. Is there a way to do that without instanciating axes and assigning them to a figure? Is there a way I can do : "self.canvas.add_figure" ? Because in my case I don't have access to the axes.

Edit : here's the code of the canvas.

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
import matplotlib.pyplot as plt
from PyQt4 import QtGui
class Canvas(FigureCanvas):
def __init__(self, parent=None):
self.figure = plt.figure()
FigureCanvas.__init__(self, self.figure)
self.setParent(parent)
FigureCanvas.setSizePolicy(self,
QtGui.QSizePolicy.Expanding,
QtGui.QSizePolicy.Expanding)
FigureCanvas.updateGeometry(self)

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