How to stop a MFC/win32 control re-painting
- by John
I have a CRichEditCtrl, and an algorithm works on its contents in-place, iterating through the contents and making changes. This seems to cause it to re-paaint every time, which causes flickering and a noticeable time to complete the operation, especially if the control starts scrolling.
I wondered if there's a neat way for me to stop it repainting for a period. It's actually a custom subclass of CRichEditCtrl in use so I was thinking something like:
void MyCustomEditCtrl::DoAlgorithm()
{
enableRepaint(false);
...
//to the actual work
...
enableRepaint(true);
}
What's the neatest approach? A custom on-paint handler which does nothing when an operation is in progress? Or can repainting actually be disabled?
