Called when an output-pane is resized.
The generic function
output-pane-resize is called when the output-pane
specify the new width and height.
specify the position, but are not reliable and should not be used.
The primary method specialized on output-pane sets up internal slots and calls the resize-callback .
:resize-callbackinitarg. It is useful to define your own
output-pane-resizemethod only when you define your own subclass of output-pane which needs to do something when resizing, and you want to allow different resize-callback s for individual instances of this class.
output-pane-resizeshould not draw anything. Newly-exposed areas are automatically displayed by a later call to the display-callback . If areas that are already exposed need redrawing,
output-pane-resizeshould call invalidate-rectangle to mark these areas for the display-callback .
CAPI User Guide and Reference Manual (Windows version) - 3 Aug 2017