-------- Original Message -------- Subject: [Lazarus] double win scroll [Re: Dear developers, we need your help before releasing 0.9.26] Date: Fri, 05 Sep 2008 19:52:56 +0100 From: Martin Friebe Reply-To: General mailing list To: General mailing list References: http://bugs.freepascal.org/view.php?id=11768 Scrolling with the mouse wheel can affect more than one window. From short testing this seems to be a regression too. I can reproduce this, but only with SVN. 0.9.24 is not affected. I have found some more info. Assume the following layout: (O Object inspector / S Synedit / M MainBar) MMMMMMMM OO SSSSSSS OO SSSSSSS OO SSSSSSS OO SSSSSSS If the mouse is over the Synedit (relative X=50 y=90) and the absolute screen coordinate (50/90) is over the objInspector (a scrollable part of the oi, like the grid) then the grid will scroll together with synedit. in C:\lazarus_latest\lcl\interfaces\win32\win32callback.inc line 1803 ++ WM_MOUSEWHEEL: begin ... with LMMouseEvent Do begin X := GET_X_LPARAM(LParam); Y := GET_Y_LPARAM(LParam); // check if mouse cursor within this window, otherwise send message to window the mouse is hovering over P.X := X; P.Y := Y; ....... Windows.ScreenToClient(TargetWindow, P); This last line seems to somehow be guilty I observed the following, (with a breakpoint on this code) - first entry: X/Y GET_X_LPARAM are the screen coordinates - 2nd entry X/Y GET_X_LPARAM are the relative coordinates, as after the last Windows.ScreenToClient(TargetWindow, P); I'll see if I can find more, but maybe someone more closer to the code, can use the above to more quickly find the issue Paul Ishenin wrote: > Hello, General mailing list. > > Lazarus 0.9.26 is coming. We have made all the main changes we wanted to > make. We spent the last couple of days on bug fixing. We have fixed many > issues, but we are not sure we have fixed all regressions. It would be > sad to release a version, that you cannot use. > > Thus we kindly ask you to test our latest snapshots at > http://www.hu.freepascal.org/lazarus/ or (better) the svn version. > Please, check your work projects, run tests, play with the IDE, do crazy > things. And if you find a regression, let us know through the bug > tracker at http://bugs.freepascal.org/ . > > Lazarus 0.9.26 will not be released with regressions (new errors, things > that worked in 0.9.24), *if* we know about them. If there are no more > regressions, we will release in one or two weeks. After the release it > will be too late to bash us for regressions. So grab this opportunity. > > The Lazarus team. > > _______________________________________________ > Lazarus mailing list > > http://www.lazarus.freepascal.org/mailman/listinfo/lazarus >