Repaintmode:=rmOptimizer in TImgView32
lazarus / 39-Graphics

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Flemming · 2012-09-24 10:43

Using the Graphics32 library, I'm trying to set Repaintmode to
rmOptimizer for a TImgView32 with a Changed(Rect) call to the
TBitmapLayer. I need to be able to draw on the Bitmaplayer with the
mouse, so it's necessary to get a fast realtime update on the canvas.
But it seems that the bitmap-buffer is influenced by the form's
update(buffer), so that updated components on the form shows up in the
ImgView.
How can i prevent that from happening ? 

I have tried to set DoubleBuffered to false, but it didn't help.

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Flemming · 2012-10-04 14:30

Finally i found a solution  ! Just have to make a
ImgView.ForceFullInvalidate on the TImgView32 after OnMouseUp event.
Not sure that it's the best solution, but it solved my problem.