Window for which the highlight is being drawn. Used to retrieve
the window's dimensions, among other things.
GC gc (in)
Graphics context to use for drawing the highlight.
int width (in)
Width of the highlight ring, in pixels.
Drawable drawable (in)
Drawable in which to draw the highlight; usually an offscreen
pixmap for double buffering.
DESCRIPTION
Tk_DrawFocusHighlight is a utility procedure that draws the
traversal highlight ring for a widget.
It is typically invoked by widgets during redisplay.