David García Garzón
dgarcia at iua.upf.edu
Wed May 2 04:35:35 UTC 2007
On Dimarts 01 Maig 2007, Arnold Krille wrote:
> Am Dienstag, 1. Mai 2007 schrieb Christian Schoenebeck:
> > Es geschah am Tuesday, 1. May 2007 22:15 als Thorsten Wilms schrieb:
> > > I have been working on concepts and mockups on knobs, radial popup
> > > menus and sliders.
> > > http://thorwil.wordpress.com/tag/widgets/
> > Damn and I was already looking for the source code.
> > Anyway, some good fresh ideas for the already a bit rusty widget
> > syndicate. I think such a "fan slider" could be efficiently and pretty be
> > implemented using Qt4's new vector graphics API which also supports
> > translucency.
> I think the fan-slider could get pretty complicated in Qt. Afaik you can
> only paint in the own widget. So painting these fans across neighbored
> widgets would call for an additional widget popping up...
> But with some work it could be possible. :-)
Maybe a widget not included on the container layout but with sizes and
position depending on the slider's ones.
> What about starting a Qt-library with some nice faders/sliders and knobs?
Some of this is what we have started on the CLAM project. We are gathering
some of the best GPL Qt audio related widgets around  into a Qt designer
plugin so you can use all of them on CLAM prototypes, but also we would be
delighted if that becomes a comunity effort not bound to CLAM. If fact, most
of the widgets have no real dependencies on CLAM.
The plugin currently includes:
- CLAM realtime data visualization widgets (oscilloscope, bargraph, vumeter,
keyspace, tonnetz...), and a ControlSurface widget (controls/visualizes a
pair of parameters to explore by moving a point in a surface).
- Pksampler povray based widgets but ported to C++ and with properties to
configure the pixmap collection 
- Rosegarden/QSynth knobs but with QGradient based drawing. Also with
properties to configure the color and mouse interaction (linear vs radial)
David García Garzón
(Work) dgarcia at iua dot upf anotherdot es
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