2009/5/7 Ben Wheeler <[email protected]>
> Navaho Gunleg <[email protected]> wrote:
>
> > 2009/4/26 Andreas Pflug <[email protected]>
> >> As soon as I play, the cpu usage rises again (mostly in xorg, caused by
> >> wVuMeter updates), which I reduced drastically by using repaint()
> instead of
> >> update() in WWidget::setValue().
> ...
> > That update( ) in stead of repaint( ) does indeed make a noticable
> > difference for the problem I had with the cross-fader widget.. That
> waveform
> > display is soooo useful as a guidance, it's awesome I can have it back
> now.
> > :)
>
> Isn't that the opposite of what Andreas did? He changed update() to
> repaint(), you're saying you've changed repaint() to update() ??
>
>
No, not at all, I'm sorry if I was not clear. His change just gave me an
idea to poke around in a different file alltogether -- I haven't been in any
of the files that his patch touched.
I have modifed wslidercomposed.cpp that called the repaint( ), to now do
what QT recommends: call update(). It has major performance increase over
here, the slider-animation was always running an increasing amount of time
behind if it was receiving bursts of MIDI "fader"-data. Everything seems to
indicate that was because something wanted it repaint'ed all the time.. The
(quite trivial) patch has been attached to this message. :-)
Cheers!
--- wslidercomposed.cpp.org 2009-05-11 20:14:01.000000000 +0200
+++ wslidercomposed.cpp 2009-05-11 20:14:54.000000000 +0200
@@ -94,7 +94,7 @@
setValue(m_fValue);
- repaint();
+ update( );
}
void WSliderComposed::unsetPixmaps()
@@ -228,6 +228,6 @@
else if (m_iPos<0)
m_iPos = 0;
- repaint();
+ update( );
}
}
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