On 05/31/2011 04:35 PM, Doug Stewart wrote: > We have a project that 3 people are working on. The repaint works in the > Mac. the same code compiled on Ubuntu does not work. > > { > > connect(this, SIGNAL(pointChanged()), this, SLOT(repaint())); > > } Try update() instead of repaint(). Calling repaint() is a bad idea most of the time.