[Clam-devel] Re: QSynth Knobs

[Rui Nuno Capela]

Hi David,

Good to hear from you, gain since last night on LAC2007, Berlin.


On Mon, April 16, 2007 23:38, David Garcia Garzon wrote:
> Hi, Rui. I liked a lot the knobs you are using for qsynth. The widget
> which was adapted (and enhanced?) from Chris Canam Rosegarden code. I
> integrated it in CLAM and now is a widget more you can use to prototype
> applications. Apart from porting it to Qt4 i also did some enhancements:
>

Credit should also be due to Pedro Lopez-Cabanillas who brought the
original Rosegarden knobs to Qsynth in the first place ;) He's being CCed
here too.


> * Knob and shadow gradients use QGradient classes
> * Pixmap cache was removed. Maybe i did something wrong on the port but
> the widget was very sludgy until it generated all the possible possitions
> and on resizing was worst. Also qt4 does double buffer by itself -> no
> need for pixmap at all. * The scale has also a gradient
> * To match mouse gestures center, i had to center the knob drawing on the
> widget area when not square * Most of the sizes and positions expressed as
> formulas and variables on the top and used later. This will ease any
> further change on proportions and dimensions. * Of course, it is
> integrated as a plugin for designer
>
> I still have to do some enhancements, such allowing more interaction
> modes as option (such the one Chris implements in his current knob
> version). Anyway if you are interested, you can find the code here:
> http://iua-share.upf.edu/svn/clam/trunk/NetworkEditor/src/monitors/QSynth
> Knob.cxx
> http://iua-share.upf.edu/svn/clam/trunk/NetworkEditor/src/monitors/QSynthK
> nob.hxx
>
> I also took some screenshot of their current look:
> http://clam.iua.upf.edu/wikis/clam/index.php/Development_screenshots
>

Yep, they look pretty cute, indeed. Thanks for the notice. As I'm nearing
the edge on starting the Qt4 port of all my Q-suite (Qsynth, QjackCtl and
Qsampler) those new knob components will be welcome back rightly,
specially on Qsynth, of course ;)


>
> You can see on the gallery i also ported PKSampler pixmap based widgets.
> Together with CLAM DSP data views it is starting to be a powerfull audio
> toolbox for QtDesigner which may have sense to be distributed
> independently of CLAM.
>

I agree and that should be awesome, that is, making those widgets stand
alone and actually as Qt-designer plug-ins.

Cheers.
-- 
rncbc aka Rui Nuno Capela
rncbc at rncbc.org