New: Maximize button missing from QMainWindows that aren't the first displayed in the

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           Summary: Maximize button missing from
QMainWindows that aren't
                    the first displayed in the application
           Product: kwin
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kwin kde org
        ReportedBy: phz cadence com


Version:            (using KDE KDE 3.5.6)
Installed from:    Ubuntu Packages
OS:                Linux

Our application is based on Qt.  This occurs with both our
Qt 4.1.4 based application version and our Qt 4.2.3 based
application version.  Our application starts with a
QMainWindow-derived console window, which always displays
with a Maximize button.

When displaying on a system using KDE 3.1.3-6.10 Red Hat,
windows that we bring up (all derived from QMainWindow)
subsequent to the console window all have Maximize buttons.

However, when displaying to a system using KDE 3.3.1-3.14
Red Hat, or KDE 3.5.6 (on a Ubuntu system), there is no
Maximize button on any subsequent windows, and the Maximize
menu entry for the window frame menu is grayed out.

This is VERY annoying to our customers.

I am not aware of anything we are doing that would prevent
the Maximize button from appearing, and Trolltech knows of
nothing we are doing that would do that either.

If there is anything we can do to tell Kwin to add the
Maximize button, please let us know.  Also, if you could fix
Kwin to work properly, we would really appreciate it.
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------- Additional Comments From phz cadence com  2007-07-17
01:15 -------
Created an attachment (id=21166)
 --> (http://bugs.kde.org/attachment.cgi?id=21166&actio
n=view)
picture showing missing maximize button

This picture shows the missing maximize button on the window
titled
"/etc/motd".
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http://bug
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------- Additional Comments From phz cadence com  2007-07-17
01:18 -------
Created an attachment (id=21167)
 --> (http://bugs.kde.org/attachment.cgi?id=21167&actio
n=view)
picture showing expected behavior (KDE 3.1.3)

This picture shows the Maximize button is there on the same
window it is
missing on in the other picture.  This is the expected
behavior that we get
with KDE 3.1.3-6.10 Red Hat, and that we don't see with KDE
3.3.1 or 3.5.6.
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------- Additional Comments From phz cadence com  2007-07-17
01:20 -------
In both attached pictures I am running the same version of
our software, based on Qt 4.2.3, and running on a Solaris 8
system displaying to a VNC display running on a Linux
system.
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------- Additional Comments From phz cadence com  2007-07-17
22:51 -------
Created an attachment (id=21173)
 --> (http://bugs.kde.org/attachment.cgi?id=21173&actio
n=view)
xprop output for KDE 3.1.3

xprop output for /etc/motd window displayed to KDE 3.1.3
desktop.
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------- Additional Comments From phz cadence com  2007-07-17
22:52 -------
Created an attachment (id=21174)
 --> (http://bugs.kde.org/attachment.cgi?id=21174&actio
n=view)
xprop output for KDE 3.5.6

xprop output for /etc/motd window displayed to KDE 3.5.6
desktop
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------- Additional Comments From phz cadence com  2007-07-17
23:05 -------
Created an attachment (id=21175)
 --> (http://bugs.kde.org/attachment.cgi?id=21175&actio
n=view)
code used to calculate max window size

This is the portion of code used in our QMainWindow derived
class for
calculating the maximum window size.
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------- Additional Comments From phz cadence com  2007-07-17
23:11 -------
Note that although the code included says "max window
size can be full size of display", the logic actually
maxes to the desktop availableGeometry area to ensure we
don't make the window so large that the desktop toolbar
hides part of the window.
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------- Additional Comments From phz cadence com  2007-07-17
23:27 -------
xprop on the two desktops show that both desktops are
1024x768.

Using xmag on the windows, I find that on the KDE 3.1.3
window the window frame is 20 pixels high on the top, 6
pixels wide on the right and left and 6 pixels high on the
bottom.  On the KDE 3.5.6 window, it's 23 pixels on top, and
4 pixels on the sides and bottom, so the max size
calculation seems to be correct.
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http://bug
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l.lunak kde org changed:

           What    |Removed                     |Added
------------------------------------------------------------
----------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX



------- Additional Comments From l.lunak kde org  2007-07-18
15:21 -------
The area for maximizing windows is 1024x768, but the window
requests smaller maximum size than that -> KWin will
therefore not allow maximizing of the window. That is what
you are doing to prevent the Maximize button from appearing.
There is nothing in KWin to fix to work properly.

I admit the window in this very specific case could actually
fit, since the difference is exactly the border size, but
since that can change dynamically, I don't find it worth the
effort to do something about it just because you're trying
to be smarter than the window manager.

The fix for you is simple though - just drop the nonsensical
maximum size, as there's no point in setting it (for
example, what you say in comment #8 makes no sense, since
maximum size has nothing to do with components of the
desktop covering a window). If you for some reason need this
for some broken window manager, I see in the code you have
special cases for some window managers, so keep it just for
those window managers (or alternatively opt out for window
managers like KWin that can figure out the obvious on their
own).
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