I think this is reasonable. Can you make a Pull Request with this change?
On Fri, Mar 23, 2018 at 5:28 PM, Olivier via Matplotlib-users <
matplotlib-users at python.org> wrote:
> Hello,
>
> Please consider the figure produced by "im = imshow(scipy.misc.face())".
> The message in the Toolbar reflects the position of the cursor and displays
> for example:
>
> "x=843.9 y=384.7 [91, 102, 88]"
>
> I changed the method "im.axes.format_coord()" in order to show specific
> information in the Toolbar message, and this works fine.
>
> However, the value of the cursor data, i.e. the string " [91, 102, 88]" in
> the example above, is still printed after my home-made coordinate
> information.
>
> PROBLEM: I don't want this information to be displayed.
>
> NOT A SOLUTION: I overrode the method "im.format_cursor_data()" so that it
> returns either "" or 'None'. However, in both cases, the brackets are still
> displayed, showing either " []" or " [None]", which I find unsatisfactory.
>
> It seems that the brackets are hardcoded in "backend_bases.NavigationToolb
> ar2.mouse_move()".
>
> Is there a clean way to get rid of the cursor data and the brackets?
>
> If not, I suggest the patch below. Does it make sense? The effect is
> simply that if "im.format_cursor_data()" returns 'None', no cursor data
> will be appended to the coordinate information.
>
> Best regards,
>
> Olivier
>
> """
> --- backend_bases.py 2017-12-10 04:59:43.000000000 +0100
> +++ temp/backend_bases.py 2018-03-23 22:09:10.611351451 +0100
> @@ -2898,7 +2898,9 @@
> if a is not event.inaxes.patch:
> data = a.get_cursor_data(event)
> if data is not None:
> - s += ' [%s]' % a.format_cursor_data(data)
> + data_str = a.format_cursor_data(data)
> + if data_str is not None:
> + s += ' [%s]' % data_str
>
> if len(self.mode):
> self.set_message('%s, %s' % (self.mode, s))
> """
>
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