[IPython-dev] manipulating inline plots with widgets

Brian Granger ellisonbg at gmail.com
Wed Jan 29 21:16:24 EST 2014


Can you file an issue on GitHub for this? Thanks!

On Wed, Jan 29, 2014 at 12:17 PM, Zoltán Vörös <zvoros at gmail.com> wrote:
> Hi all,
>
> First off, the new widget machinery is really exciting, I believe, it opens
> an entirely new dimension of user experience. Many thanks to all who have
> put in hard work to make this happen.
>
> I have been playing around with a couple of gadgets, and in particular, I
> wanted to manipulate plots using the slider. The following works with the
> qt4 matplotlib backend (I guess, it would work with other backends, but
> that's off the point):
>
> In[48]:     def on_value_change(name, value):
>                     x = linspace(0, value, 100)
>                     plot(x, sin(x))
>
> In[49]:     fig, ax = subplots(1)
>                 m1 = widgets.FloatSliderWidget()
>                 m1.on_trait_change(on_value_change, 'value')
>                 ax.plot(x, sin(x))
>                 m1
>
> However, I was wondering, whether there is a way of doing the same in the
> notebook. I have tried to pass ax as the keyword argument in the constructor
> of m1, but that doesn't seem to produce the desired results. Could someone
> comment on this?
>
> Another issue I have noticed is that if the widgets are inserted in the
> notebook, it results in an erratic behaviour of the code cell. So, e.g., if
> I press Cntr-Enter on input line 49, and then pull the slider, and then
> click on ax.plot(x, sin(x)) with the mouse, the border of the cell becomes
> green, so I would assume that one can edit the cell at that point. But what
> happens instead is that the shortkeys bound to the inactive cell are
> invoked. So, if I press a, then a new code cell will be inserted above. The
> issue goes away, if I click on the cell once more. This behaviour I noticed
> on chrome v31. I can try other browsers, if that helps.
>
> Thanks,
>
> Zoltán
>
>
>
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>



-- 
Brian E. Granger
Cal Poly State University, San Luis Obispo
bgranger at calpoly.edu and ellisonbg at gmail.com



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