QgraphicsScene and matplotlib navigation toolbar

[Luca Bertolotti]

Hello is possible to add the nabitoolbar to a scene

For add the graph i do as follow:
def test_draw(self):
        scene = QGraphicsScene()
        figure = Figure(figsize=(9.18, 6.25), dpi=55)
        axes = figure.gca()
        axes.set_title("Test Draw")
        lista_r_mp = []
        lista_y_mp = []
        for a in range(len(lista_r)-1):
            print(float(lista_r[a]), float(lista_r[a+1]))
            test_r = np.linspace(float(lista_r[a]), float(lista_r[a+1]))
            lista_r_mp.append(test_r)
        for b in range(len(lista_y)-1):
            test_y = np.linspace(float(lista_y[b]), float(lista_y[b+1]))
            lista_y_mp.append(test_y)
        for c in range(len(lista_y_mp)):
            axes.plot(lista_r_mp[c], lista_y_mp[c])
        axes.grid(True)
        canvas = FigureCanvas(figure)
        proxy_widget = scene.addWidget(canvas)
        scene.addItem(proxy_widget)
        self.graphicsView_2.setScene(scene)

How i can add navitoolbar i have try:
         scene_one = QGraphicsScene()
         canvas_1 = FigureCanvas(figure_1)
        navigation = NavigationToolbar(canvas_1, self)
        tabella = scene_one.addWidget(navigation)
        scene_one.addItem(tabella)
        self.graphicsView_2.setScene(scene)
        self.graphicsView_3.setScene(scene_one)

but no toolbar is displaied
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