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List: kde-bugs-dist
Subject: [Bug 278981] New: Calling QWidget::setGeometry() on a top-level
From: Bartosz Brachaczek <b.brachaczek () gmail ! com>
Date: 2011-07-31 23:51:05
Message-ID: bug-278981-17878 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=278981
Summary: Calling QWidget::setGeometry() on a top-level window
makes it appear on different coordinates each time it
is shown
Product: kwin
Version: unspecified
Platform: Gentoo Packages
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: compatibility
AssignedTo: kwin-bugs-null@kde.org
ReportedBy: b.brachaczek@gmail.com
Created an attachment (id=62402)
--> (http://bugs.kde.org/attachment.cgi?id=62402)
testcase.cpp
Version: unspecified (using KDE 4.7.0)
OS: Linux
Calling QWidget::setGeometry() on a top-level window makes it appear on
different coordinates each time it is shown. More precisely, it seems it moves
to the bottom-right corner in steps of window's
geometry().topLeft()-frameGeometry().topLeft().
Normally I would report such thing to the Qt bugtracker but it didn't behave
like that in KDE SC 4.6.x. It is a new thing in KDE SC 4.7.0. Maybe it's still
a Qt bug or not a bug at all, but I'm not the one to decide.
Calling regular resize() + move() instead of setGeometry() does not result in
any similar problems.
Attaching example code that shows the issue quite good.
Reproducible: Always
Steps to Reproduce:
1. Grab my testcase and save it as testcase.cpp.
2. Run
$ moc testcase.cpp > testcase_moc.cx
3. Run
$ g++ `pkg-config --libs --cflags QtGui` -o testcase testcase.cpp
4. Run
$ ./testcase
and watch the window showing up every time in a different place.
Expected Results:
If KWin devs consider it a bug in KWin, it is fixed so that the window shows
every time on the same coordinates. If it is a bug Qt, it gets reported.
I discovered it because an app I am developer of (Kadu IM) was calling
setGeometry() on top-level windows and we were experiencing that kind of moving
windows when restoring from tray. We have already fixed it to resize() + move()
but there may be more apps doing like we before (I don't know any, though).
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