Help with QGraphicsScene

I need help with a small problem I can't seem to figure out. I'm drawing a grid and the width and height of each cell is changeable. Nothing is changed until I call the Update( QRECT) function. I came up with a quick solution to call it along with my drawGrid() function, but now it chokes the cpu since it is called all the time. A couple of segmentation faults later, I turned to you guys. Is there any way update the scene when it needs to be?

If it's segfaulting, there's something wrong somewhere other than your updates. Have you tried running in a debugger to see where the program is failing?

I was the updates I made, so I removed those pieces of code. I saw in the documentation that the graphics view class had "setViewportUpdateMode ( ViewportUpdateMode mode )". Could this remedy the problem?

EDIT:

Fixed it. I connected a signal to the update() function. Works like a charm now!