Scroll Bar

[Semen Matusovski]

Hi, guys --
Just now I work under Win2000 and it looks that maximum value of trackpos in %SB_THUMBTRACK =
si.nMax - si.nPage (unlke %SB_LINE...)
I can adapt a code, but this confuses me, because in MSDN I don't see any information.
Question: is it true (and in all OSes) or I'm somewhere wrong ?


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E-MAIL: [email protected]

[Dominic Mitchell]

It seems Microsoft finally got it right. I always wondered by that brain
dead scrollbar could not figure out what the maximum track position should be
given a specific page size. Under Windows95 if you had a page size of 16 and
260 lines to display, you would set the range to 1 through 244 so that the last
line would be at the bottom of the display and not off the top somewhere.

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Dominic Mitchell

[This message has been edited by Dominic Mitchell (edited January 30, 2001).]

[Borje Hagsten]

Yes, both SB_THUMBTRACK and SB_THUMBPOSITION is si.nMax - si.nPage + 1.
(not sure about +1, but think so) Natural, since that gives full view.
Set nMax a bit higher if you need to scroll past end.

Forgot to mention - tested in Win98. Don't if it's same in 95.
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[This message has been edited by Borje Hagsten (edited January 30, 2001).]

[Semen Matusovski]

Borje --
I more or less solved questions under Win2000 (Source forum, Rotate bitmap, part 2).
Just now I am under 95. And it looks that I lose at least 1 pixel - the most right and bottom).
Guys, what do you see ?

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E-MAIL: [email protected]

[Borje Hagsten]

He, to ask me look for a lost pixel is like asking a blind to find
needle in haystack, or even the haystack itself. Look good to me,
even took off glasses and put my nose to the screen, but entire
picture seems to be there. (unreliable test, I can hardly even
find the screen sometimes..

PS, forgot to say - nice pieces of code, especially the rotation
code.
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[This message has been edited by Borje Hagsten (edited January 30, 2001).]