How can I prevent GDI + from redrawing everything on paint?
I want to change the color of some parts of a control that uses GDI + for drawing, for example when some objects are hovered / clicked, for example.
How can I re-draw only the parts I need? It seems unfortunate to re-draw thousands of pixels when I only need to make changes to some of them.
To be specific, I have drawn anywhere from 1 to 128 rectangles, and I will need to re-draw 1 to 128 rectangles in different events. I don't want to re-draw 128 rectangles to only make changes in 1-127.
I've read that it's a good idea to use paint code in places that are not the paint event. But is it possible to do this by relying on the paint event?
source to share