We were previously building our own mouse pointers out of pixmaps,
having first drawn characters from the X server standard font 'cursor'
on to those pixmaps, giving an effect almost exactly the same as just
calling gdk_cursor_new(some constant) except that we got to choose the
foreground and background colours of the resulting pointers.
But it's not clear why we needed to do that! In both GTK1 and GTK2 as
of my current testing, the standard colours appear to be just what I
wanted anyway (white pointer with black outline). The previous
implementation (and commit comment) was written in 2002, so perhaps it
was working around a GTK1 bug of the time.
So I've removed it completely, and replaced it with simple calls to
gdk_cursor_new (plus a workaround for GTK1's lack of GDK_BLANK_CURSOR,
but that's still much simpler than the previous code). If anyone does
report a colour problem, I may have to go back to doing something
clever, but if I can possibly arrange it, I'll want to do it by some
other technique, probably (as suggested in a comment in the previous
implementation) getting the underlying X cursor id and calling
XRecolorCursor.
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