dsampson@x102a.harris-atd.com (sampson david 58163) (08/30/90)
I was looking at the PowerPoint ad in a mag and noticed the "icon"
areas at the top of the verticle scroll bar of the main window client
areas. I remembered that Word for Windows has the same kind of thing
when you switch to Page mode. MS draws "pages" above and below the
verticle scroll bar. When the user clicks on one of them, it goes
forward or back a page at a time.
I was wondering how that kind of thing is implemented. I don't have
my reference manual here at work, but I don't think the scroll bar
XOR'ed parameter in the window class definition supports that kind of
thing. So it seems logical that MS probably made the "icons" a child
window (and subclassed to the parent), painted whatever they wanted in
it, and put in a client area verticle scroll bar control (and
controlled the clipping of the parent window).
Someone, the other day, was commenting on how the Petzold book is
really great about getting one up to speed, but there's not much out
there to draw from on when it comes to the clever implementations of
things. So, anybody have any thoughts about the stuff I mentioned
above, or want to discuss other stuff like that?
David
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I Damn Pigeons!
David Sampson Harris Corporation
dsampson@x102a.ess.harris.com Gov't Aerospace Systems Divison
uunet!x102a!dsampson Melbourne, Florida
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