docs: def get_matplotlib_layout(widget, flag_toolbar=True):
      """
      Creates figure, toolbar, layout, sets widget layout
  
      Returns figure, canvas, layout
  
      Reference: http://stackoverflow.com/questions/12459811
  
      """
      fig = plt.figure()
      canvas = FigureCanvas(fig)
      #        self.canvas.mpl_connect('button_press_event', self.on_plot_click)
      layout = QVBoxLayout(widget)
      if flag_toolbar:
          toolbar = NavigationToolbar2QT(canvas, widget)
          layout.addWidget(toolbar)
      layout.addWidget(canvas)
      a99.set_margin(layout, 0)
  
      return fig, canvas, layout