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MFC CEditView redraws twice
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I have a MFC tabbed MDI application in which the tabbed child window types are CEditView, CRichEditView and CView. I've noticed that when I switch between them (click the top of the tab to make that window the active window) they repaint the client area, as expected, but the CEditView windows flicker .. and I can see they are repainting twice (at least) for some reason. The CView and CRichEditView windows only repaint once.
 
Even if the CEditView window is already the active tab, if I click the top of the window, it gets redrawn twice ... with a flicker.
 
Since this redraw/flicker is annoying - does anyone have an idea why it would redraw more than once?
 
Thx,
Posted 22 Dec '12 - 12:05
Chris___808225
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Comments
Nelek - 22 Dec '12 - 18:56
I had a similar problem a while ago, in my case was because I was calling the Invalidate and UpdateWindow in more places than the strictly needed. It is worth to have a look. Have you tried with the debugger and step into the code in that window?
Sajeesh payolam - 23 Dec '12 - 1:30
I think Nelek is right. Because some of your Invalidate() makes problem. This will leads to flickering. You should need to debug your code first.

1 solution

Good idea Nelek.
 
I put a breakpoint on every Invalidate and UpdateWindow in the app ... and alas it did not hit any of those.
 
It seems it is not being triggered by my code explicitly.
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Posted 22 Dec '12 - 14:03
Chris___808225
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