[Gammaray-interest] Graph library

[Kevin Funk]

On Friday, 24 May 2019 08:20:58 CEST Christian Gagneraud wrote:
> On Fri, 24 May 2019 at 05:34, Kevin Funk <kevin.funk at kdab.com> wrote:
> > At some point you need to bite the bullet and just write code for one use-
> > case; I've tried the too-generic approaches (wrapping GraphViz API in an
> > "open-minded" way) before, which failed.
> 
> I see what you mean, i've already given up 2 layers of "genericity"! :)
> And what i'm trying now is to reduce and transform the params table
> into a controlled vocabulary so to speak, that's quite time consuming.
> As you said, this thing sometimes look like a powerful but fragile and
> hard to tweak system.
> 
> I decided to start looking at all the plugins, see how hard it is to
> write one, how to hook on the remote components, ...And i saw your VTK
> based object visualiser, so i installed the VTK dependencies (and
> fixed the CMake file), and ran it.
> That's quite interesting, it looks "bare", but it show stuff!
> 
> I ran it on a dead simple app, and then on QtCreator, it was not too
> bad once the graph is built and laid out. And then i decided to open
> the Gammaray project with it ... ouch!
> 
> I had to hide the labels, as it was cluterring the view, 'ive added a
> few (new) layout strategies, and well, that's interesting...
> I'm not familiar with VTK, it seems to be quite a complex beast, I had
> a quick look at their graph and layout and it looks good to me.
> What's the status about this plugin? Do you think it's worth spending
> time on it, are you aware of limitations or maybe you know it's a dead
> end.

Heya,

The object visualizer plugin initially was just a tool plugin to toy around 
with VTK. At that time I was working on customer projects using VTK - and thus 
built up some knowledge in that area - and we came up with the "lunatic" idea 
of visualizing the QObject hierarchies inside a VTK graph layout ;)

It's fun to look at, but mostly useless to really debug Qt application. We 
decided to keep it alive, but we haven't really spend time on the plugin for a 
couple of years now. I haven't worked with VTK for quite a while now as 
well...

If you can adapt to new VTK layouting strategies, fix bugs, etc. that's of 
course welcome. But it's not like this is or will become a super important 
feature of GammaRay, I believe.

Regards,
Kevin



> Chris


-- 
Kevin Funk | kevin.funk at kdab.com | Senior Software Engineer
KDAB (Deutschland) GmbH, a KDAB Group company
Tel: +49-30-521325470
KDAB - The Qt, C++ and OpenGL Experts
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