[Haskell-cafe] Study GUI and FRP sequentially or concurrently? Superimposing graphics and text.

Jeffrey Brown jeffbrown.the at gmail.com
Wed Jan 7 17:01:18 UTC 2015

Reactive-banana can work with GTK?! Heinrich, Oliver, should perhaps the
bindings at
be referred to from the reactive banana homepage?

On Wed, Jan 7, 2015 at 2:32 AM, Oliver Charles <ollie at ocharles.org.uk>

> Jeffrey Brown <jeffbrown.the at gmail.com> writes:
> > Hi!
> >
> > I want to write a mindmapping app, like Freeplane, which involves drawing
> > rectangles containing text and arrows connecting them. For that purpose,
> > today I installed reactive-banana, wxWidgets, wxHaskell and
> > reactive-banana-wx. (It's the first complex install for which I didn't
> have
> > to write the list for help!)
> >
> > Am I correct that the question of whether graphics can be superimposed
> over
> > text depends only on wxHaskell, and not reactive-banana? Would you
> > recommend first writing code that uses only wxHaskell, to become familiar
> > with the library, or jumping right in by using reactive-banana at the
> same
> > time?
> Hi Jeffrey,
> You might be interested in the work I'm doing on a 2D level editor for a
> game I'm building. The game is "hadoom", and it's a clone of Doom
> (inventive name, eh?). The level editor is top-down cartography
> software, and you can see fairly recent screenshots here:
>     http://t.co/LgMRHw2y0Z
>     http://t.co/O2DhKZWwcG
> There is also an old video here
>     https://www.youtube.com/watch?v=Cfc4QkfAHx4
> Anyway, the reason I say this might be interesting, is this is built
> using reactive-banana, GTK, and the "diagrams" library. I've found this
> a really nice way of building an interactive GUI such as this - GTK
> gives me the basic framework of the application, and I use a
> GtkDrawingArea for the main canvas. I then model all interaction through
> reactive-banana, and finally output a Diagram at the end. I use the
> diagrams-cairo backend to render this directly into the GtkDrawingArea.
> The source code for this is at
>     https://github.com/ocharles/hadoom/tree/master/hadoom-editor
> though I should warn you it's somewhat in a state of rapid development,
> so things may change wildly. However, the basic approach of using GTK,
> reactive-banana & diagrams will not change.
> Hope this helps!
> -- ocharles
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