Displaying Matplotlib Navigation Toolbar in Tkinter via grid

I'm developing a small Tkinter GUI to draw matplotlib-plots. (It contains a few Entries and assembles the plot according to their content.) I have designed my plotting widget according to http://matplotlib.org/examples/user_interfaces/embedding_in_tk.html, only I use grid instead of pack: ``` canvas = FigureCanvasTkAgg(fig, master=root) canvas.get_tk_widget().grid(row=1,column=4,columnspan=3,rowspan=20) ``` That part works. But embedding the NavigationToolbar in the same fashion does not. Tkinter breaks down without error when I include the lines: ``` toolbar = NavigationToolbar2TkAgg( canvas, root ) canvas._tkcanvas.grid(row=22,column=4) ``` I know this is because NavigationToolbar calls `pack` internally, and `pack` and `grid` don't get along. However, I like grid and would hate to have to redesign my whole GUI just to be able to use the NavigationToolbar. Is there a workaround so I can use NavigationToolbar2TkAgg via grid? (I have found the advice to "subclass and overload" here, but don't know how to do that.) Any help greatly appreciated!