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Vasic
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 Posted: Visual C++ Language, CScrollbar Question |
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I'm trying to find out where the scroll box is while it's being dragged. When I do a TRACE() using GetScrollPos() it returns the starting position. How do I get ahold of the position while I'm scrolling
Visual C++11
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kuphryn
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| Posted: Visual C++ Language, CScrollbar Question |
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tracking mouse motion
Kuphryn
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Vasic
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| Posted: Visual C++ Language, CScrollbar Question |
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So there isn't an MFC message in OnVScroll() I can use
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Vasic
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| Posted: Visual C++ Language, CScrollbar Question |
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Sorry guys, yet again I answered my own stupid question. Evidently one of the parameters of OnVScroll() is nPos. This variable contains the updated box position. GetScrollPos() doesn't update it's position until you release the box. Sorry again... I'll try to come up with better questions in the future :(
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Vasic
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| Posted: Visual C++ Language, CScrollbar Question |
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Ok well I got some scrolling positions coming out in my trace. I'm wondering why the nPos isn't updating with the correct position. It's scrolling between the max and min in negative and positive integers as so:
Position = 0
Position = 3593
Position = 4790
Position = 9580
Position = 14371
Position = 19161
Position = 26346
Position = 32334
Position = -27214
Position = -21226
Position = -17634
Position = -11646
Position = -5658
Position = 330
Position = 5120
Position = 11108
Position = 17096
Position = 21886
Position = 27874
Position = -31675
Position = -23292
Position = -14909
Position = -5328
Position = 4252
Position = 17425
Position = 29401
Position = -22962
Position = -9789
Position = 4582
Position = 18953
Position = 24940
Position = -25027
Position = -10657
Position = 3714
Position = 18085
Position = 32456
Position = -16315
Position = -1944
Position = 12427
Position = 27995
Position = -24368
Position = -12392
Position = -2812
Position = 1979
Position = 16349
Position = 30720
Position = -18050
Position = -4877
Position = 4703
Position = 10691
Position = 20272
Position = 29852
Position = -24906
Position = -16523
Position = -6942
Position = 243
Position = 6231
Position = 11021
Position = 17009
Position = 20601
Position = 24194
Position = 26589
Position = 27787
Position = 30182
Position = -31761
Position = -28169
Position = -26971
Position = -24576
THUMBPOSITION
END SCROLL
The above is me taking the box from the top to the bottom. This is the nPos parameter in OnVScroll(). The min is 0 and the max is 565248. Hope there is an easy way to do this =]
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Martin Richter
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| Posted: Visual C++ Language, CScrollbar Question |
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The problem is that nPos in OnVScroll is a 16bit value. If you scroll positions are larger than you can't rely on the argument. You need to use GetScrollbarInfo, with this function you can get the true 32bit position of the scrollbar!
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Vasic
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| Posted: Visual C++ Language, CScrollbar Question |
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