All Manuals > CAPI User Guide and Reference Manual > 13 Drawing - Graphics Ports

13.5 How to draw to an on-screen port

Drawing on an output-pane should almost always happen only inside its display-callback. See output-pane for more information about this initarg.

If you want to display from outside the display-callback then you should call invalidate-rectangle or redisplay-element, which will cause the display-callback to be called.


CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:32:39