[Clam-devel] QSynth Knobs

[David García Garzón]

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:

* 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/QSynthKnob.cxx
http://iua-share.upf.edu/svn/clam/trunk/NetworkEditor/src/monitors/QSynthKnob.hxx

I also took some screenshot of their current look:
http://clam.iua.upf.edu/wikis/clam/index.php/Development_screenshots

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.

Best wishes.
David Garcia.


-- 
David García Garzón
(Work) dgarcia at iua dot upf anotherdot es
(Home) vokimon at telefonica adot net
http://www.iua.upf.edu/~dgarcia
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