OpenEuphoria

win32lib scrollbar bugs

• Posted by daryl_vdb at hotmail.com Feb 01, 2003
• 562 views

This is a multi-part message in MIME format.

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to Derek Parnell (and others)

Win32lib seems to have a problem with scrollbars that have long
ranges.  I have included a small test program which exposes this
bug.  When the scroll range is set to anything over 65535, win32lib
won't let you use the whole scrollbar.  Try this for yourself to
see what I mean.  You can still use the arrows to scroll past
65535, but if you drag the scrollbar and watch the number under it,
you'll notice that they skip back to 0.

Scrollbars built into windows are even worse.  They limit you to
100, which is really rediculous and makes these scrollbars
virtually useless.

regards,
Daryl Van Den Brink


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Content-Type: text/plain; name="Scroll.exw"; format=flowed
Content-Transfer-Encoding: 8bit
Content-Disposition: attachment; filename="Scroll.exw"

include win32lib.ew

constant
win1 = createEx(Window, "win1", 0, 0, 0, 400, 270, WS_HSCROLL, 0),
lblWinScroll = create(LText, "win1 scroll pos: 0", win1, 0, 200, 100, 30, 
0),
scrlHScroll = create(HScroll, "", win1, 0, 60, 350, 20, 0),
lblHScroll = create(LText, "HScroll pos: 0", win1, 0, 80, 100, 30, 0)

setWindowScrollRange(win1, SB_HORZ, 0, 200, 10)
setScrollRange(scrlHScroll, 0, 100000)

procedure win1_onScroll(integer self, integer event, sequence params)
        setText(lblWinScroll, sprintf("win1 scroll pos: %d", 
{getHScrollPos(win1)}))
end procedure
setHandler(win1, w32HScroll, routine_id("win1_onScroll"))

procedure scrlHScroll_onScroll(integer self, integer event, sequence params)
        setText(lblHScroll, sprintf("HScroll pos: %d", params))
end procedure
setHandler(scrlHScroll, w32HScroll, routine_id("scrlHScroll_onScroll"))

WinMain(win1, Normal)



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