http://bugs.freepascal.org/view.php?id=15765
Problem is that SynEdit at current does not update the scrollbars, if they are hidden.
But at least on windows on GTK2 the new position is alays based on the position of the old hidden scrollbar.
=> therefore the new position does not move.On windows and GTK2 (with tricks) I can update the hidden scrollbar => and the bug disappears.
I have no ideas of the side effects this may have on other systems (QT, Mac, gtk1)
To test pleas go to SynEdit.pp at the end of
procedure TCustomSynEdit.UpdateScrollBars;
line 4346
//if sfVertScrollbarVisible in fStateFlags then begin
ScrollInfo.nPage := LinesInWindow;
ScrollInfo.nPos := FFoldedLinesView.TextIndexToViewPos(TopLine-1);
SetScrollInfo(Handle, SB_VERT, ScrollInfo, True);
// insert next line
ShowScrollBar(Handle, SB_Vert, sfVertScrollbarVisible in
fStateFlags);
//end;
comment out the 2 lines commented out in the above snippet (there is a
similar block for horiz-scroll, but don't worry)
and insert the extra line Then test the attached app.the extra line is needed for gtk2 at current, but therefore it must work for others too, or gtk2 can not be fixed that way....
If you can additionally test it withou the extra line (only comment out the IF) => would be fantastic
thanks Martin
SynEdit_mouse_wheel.rar
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