[IPython-User] Fwd: adding control to notebook
Mon Apr 23 05:55:05 CDT 2012
Yes, you are right, that was done by accident. Thanks for moving it to
the mailing list!
On 04/23/2012 07:00 AM, Fernando Perez wrote:
> Hi Zoltan,
> I think you sent your reply off-list by accident, sending it back to
> the list for the record...
> ---------- Forwarded message ----------
> From: Zoltán Vörös<email@example.com>
> Date: Tue, Dec 27, 2011 at 2:13 PM
> Subject: Re: [IPython-User] adding control to notebook
> To: Fernando Perez<firstname.lastname@example.org>
> Greetings Fernando,
> Many thanks for the comments! Below are mine. Or, perhaps, I should
> say that those are mostly questions.
>> There are two related but separate problems here:
>> 1. How to allow users to load their on JS so they can later make JS
>> calls from within cells in the nb. We need to sort out a clean
>> mechanism for this, that avoids somehow collisions with the core
>> functionality of the notebook itself.
> To me this seems over-generous. I mean, letting the user load their
> own JS and so on. Then the ipython notebook is going to evolve into a
> JS frontend. What I had in mind (and this might very well fall into
> the category that you labelled "the first hack that comes to mind") is
> a generic JS that simply calls the corresponding python code. I
> believe, there are probably only a finite number of types of
> manipulation: button, slider, spinbutton... All these should just
> retrieve a number or some other object, and call a python function
> with those arguments. So, my idea was that one could just implement a
> finite number of JS, belonging to the various types of manipulation,
> and all these JS would just read out the state/value of all buttons,
> sliders, spinbuttons and so on within a cell. (I think, one can assume
> that one would want to manipulate within cells.) But I might
> oversimplify things...
> Of course, if you want to go further, e.g., make the figures also
> interactive, that might be a different issue. Actually, interactive
> figures are something that I miss a bit in the notebook. I see that I
> can use the notebook "outline". I wonder whether this question has
> come up in development. And whether an embeddable terminal, like the
> canvas terminal of gnuplot could be a solution here. In other words,
> what would be easier: make the notebook frontend be aware of a static
> image, with coordinate tracking at least (zooming might be a bit
> harder), or have a terminal based on JS directly from matplotlib? A
> canvas terminal would have the advantage that it could be used
> independent of ipython in the sense that one could just use the html
> output, and ipython would not have to run. It could be great for web
> pages, where one cannot run an ipython server. Anyway, if you think
> that this could be useful, I could just look around at matplotlib, and
> raise this issue with the developers there. In fact, it is quite easy
> to turn an SVG file into a JS, so one could "hack" it, even if it was
> not supported officially. But this might not fly with you.
>> 2. How to let users present controls whose actions fire callbacks that
>> act on the kernel side of things. This is required by a
>> Manipulate/@interact-like capability, because you want to recompute
>> expressions in the kernel and show the updated results as the user
>> moves the controls.
> I am not sure I see the problem here. I don't mean to imply that this
> is going to be plain sailing, but there are already buttons on the
> notebook that operate on the kernel: the interrupt or restart buttons,
> or the completer already interacts with the kernel. (Although, the
> completer has only a checkbox, so it might not interact with anything,
> after all.) The only difference is that these are "hard wired" into
> the notebook, and cannot be changed at run-time.
>> We just need to be patient and not implement the first hack that comes to mind
> Right. And this is why I formulated my question as asking for hints. I
> am really grateful for ipython in general, and I don't want to be seen
> as someone whining about missing features and so on. I am willing to
> invest some effort into making things happen, but I didn't know where
> to start.
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