[Haskell-cafe] Library for creating interactive diagrams?

Kai Zhang kai at kzhang.org
Tue Apr 8 00:55:34 UTC 2014

Looks like you are going to add some "control bars" to diagrams. This is
definitely a nice feature to have. But how would you be able to do
something like changing the color of a circle when you place the mouse on
it? I want control bars as well as some interactivity built directly into
the SVG.

On Mon, Apr 7, 2014 at 4:56 PM, Andrew Gibiansky <andrew.gibiansky at gmail.com
> wrote:

> I am very interested in using this with IHaskell, but don't know of
> something that exists already. I am currently working on using IPython
> widgets with IHaskell in order to create a generic "event handling"
> framework for *any* sort of displays. Code might look like this (just
> some initial thoughts):
> -- Uses a StateT of some sort. Reruns things every time
> -- a dependent value changes, and shows the updated output.
> interactive $ do
>   -- Display a slider. The value changes every time the slider moves.
>   width <- slider # name "Picture Width" # range 0.1 5
>   -- Rerun this event every key press. It can modify the state.
>   onEvent (keyPress 'c') $ do
>     modifyState doSomething
>   -- Make a diagram using the current state. Rerun every time a
>   -- slider value changes or key press event happens.
>   diagram <- makeDiagram
>   -- Show the diagram. This is what will chance in the IHaskell display.
>   display diagram
> I have Diagrams already working with IHaskell, and interactivity already
> working in another example (interactive parsers with Parsec, see error
> messages etc as you type), so all that remains is combining them. I'm
> hoping to get it working nicely sometime this summer when I have more time,
> but if you're interested in this approach, feel free to contact me.
> [0] IHaskell: https://github.com/gibiansky/IHaskell
> On Mon, Apr 7, 2014 at 4:44 PM, Kai Zhang <kai at kzhang.org> wrote:
>> Hi cafe,
>> Is there any active project about creating interactive diagrams, like
>> D3js http://d3js.org/ ? The Diagrams library has already done a good job
>> of making static images. Would it be possible to extend this library to
>> support declaring interactive diagrams and then use JS and HTML as backend
>> to draw them?
>> Example: circle 1 $ with & hover .~ (change style)
>> PS: I don't want a D3js binding.
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