Hi, Thansk for your help and your example It seems that the jerky movement is only visible on Windows and I supose that you use Linux. I have set a bug report regarding this issue : http://bugreports.qt.nokia.com/browse/QTBUG-13600 <http://bugreports.qt.nokia.com/browse/QTBUG-13600>
2010/9/17 Eduardo Fleury <[email protected]> > Hi, > > The thing here is that the fixed framerate of Qt animations is 60 fps. For > most uses this is fine, but if you are trying to move something very fast > this might be a little bit too slow. > > I've tweaked your example a little bit in order to keep the same vertical > movement speed regardless of the animation method. I also added buttons so > you can fire it up and: > > (1) Toggle between NumberAnimation or Timer animations > (2) Change the framerate (only available with the timer animation) > > In my system I had the following result: > - If the screen is large enough there's a noticeable difference between the > timer animations in 60, 120 and 250 Hz. > - Running the timer animation at 60 fps looks like the same thing as using > the standard Qt animation > > I didn't try recompiling Qt with different default framerate, but it should > give the same results. > > -- > Eduardo M. Fleury > OpenBossa - INdT > http://eduardofleury.com/ > http://www.openbossa.org/ >
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