title: Does the use of styleSheets in a dynamic manner add a lot of computation
body: <p>I have about 40 buttons that are also indicators (On or Off) and once a second I refresh the color of these indicators depending on the state.  I do this by changing the stylesheet. Is it over kill to do this and if so should I only set a new stylesheet when it the indicator has changed state or should I use something like QBrush?</p>