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From:  (Marc Hertlein)
Newsgroups: comp.sys.mac.programmer
Subject: TCL CScrollBar question (beginner)
Message-ID: <HY#-D!M@engin.umich.edu>
Date: 6 Jun 91 00:22:33 GMT
Organization: The University of Michigan, Ann Arbor
Lines: 15

I am trying to write a THINK C program (with TCL) using simple scrollbars.

Basically I have a window with a pane, which contains another pane
and some scroll bars.
Everything works as it should, but when I try to drag the thumb in the
bars, the thumb outline is not drawn while dragging. Upon releasing the
mouse button, the thumb jumps to where I released it though.
However, as soon as I draw something in the inner subpane, the scroll bars
work correctly, i.e. with thumb outline dragging. I noticed that the bars
work right as soon as I call PenNormal(). If my window gets deactivated
under Multifinder, I'm back to the old problem.
Am I forgetting to initialize some part of the scrollbar? I tried to look
into other programs, which work fine, but I don't know what I'm doing wrong.

                                           - Marc Hertlein