Changing selection in RichView makes controls blink

avlex · Post by **avlex** » Wed Feb 23, 2011 12:40 pm

We have some problems with controls added to TRichView (version 12.4.2, Delphi 6), namely with controls inherited from TGraphicControl (e.g., TSpeedButton). The added controls of this type are blinking while one is changing selection bounds in the RichView (even if the controls are not in the selected area). Is there any way to avoid this blinking?

Post by **Sergey Tkachenko** » Wed Feb 23, 2011 6:18 pm

In this version of TRichView - no, sorry.

avlex · Post by **avlex** » Thu Feb 24, 2011 9:51 am

It seems that such controls are blinking only if they are transparent (i.e. have csOpaque in their ControlStyle)... Anyway, is there any version of TRichView that has the correct behavior or it will be implemented in future releases?

Post by **Sergey Tkachenko** » Thu Feb 24, 2011 3:46 pm

Transparent TGraphicControl blinks because it is drawn after a background below it is drawn.
Probably, a buffered output for graphic controls will be implemented in future, but not soon. And it will slow down redrawing of such controls.

avlex · Post by **avlex** » Fri Feb 25, 2011 8:30 am

I see, thanks a lot for the answers!