Where the display of an
is complex you may see flickering on screen on some platforms. Typcailly this occurs in a
with many pinboard objects, or some other characteristic that makes the display complex.
The flickering can be avoided by passing the draw-with-buffer initarg which causes the drawing to go to an off-screen pixmap buffer. The screen is then updated from the buffer.
Note: GTK+ and Cocoa always buffer, so the draw-with-buffer initarg is ignored on these platforms.
CAPI User Guide (Unix version) - 30 Aug 2011