Disabling the Maximize button in QMainWindow ?

[sunil.thaha]

Hi Guys

How do we diable the Maximize Button in QMainWindow,

I am using KDE, and the I tried Playing the WindowFlags example. But to No avail.

I also tried doing this


#include <QApplication>
#include <QMainWindow>

int main(int argc, char *argv[]) {

QApplication app( argc, argv );

QMainWindow win(0, Qt::WindowTitleHint |
Qt::WindowSystemMenuHint |
Qt::WindowMinimizeButtonHint );

win.show();

return app.exec();
}



But failed,

Any Idea

[sir_johann]

I had tried with diferents Qt Wflags, but it seems no work. So the only way I had found is this:

// I use this directive in this way:
#include <qapplication.h>
#include <qmainwindow.h>

int main(int argc, char *argv[]) {

QApplication app( argc, argv );
QMainWindow *win;
win = new QMainWindow();

win->setFixedSize(200, 200);
app.setMainWidget(win);
win->show();
return app.exec();

}

If you set the window size, the maximize button won't be shown.
I hope this be useful. Regards.

[Djony]

I have tried this, but I am using Qt 4.1.4, and my compiler gives me error:


class QApplication' has no member named 'setMainWidget'

Is there any other way to disable maximize button?

[momesana]

I have tried this, but I am using Qt 4.1.4, and my compiler gives me error:
class QApplication' has no member named 'setMainWidget'


from http://doc.trolltech.com/4.2/porting4.html#qapplication


QApplication::setMainWidget (http://doc.trolltech.com/4.2/qapplication-qt3.html#setMainWidget)() is no longer used. When all an application's windows are closed, the application will exit normally.


The guy, posting the above code probably is using Qt-3.* whereas you are using Qt-4.*.

[Djony]

I got that, but the question with maximize button still stands.

[ucomesdag]

This should do it...;)


#include <QtGui/QApplication>
#include <QMainWindow>

int main(int argc, char *argv[]) {

QApplication app( argc, argv );

QMainWindow win;
win.setWindowFlags( Qt::WindowTitleHint | Qt::WindowMinimizeButtonHint | Qt::WindowSystemMenuHint);

win.show();

return app.exec();
};

[sunil.thaha]

Works well in Windows Xp , but as I mentioned first, It does not work in KDE. KDE seems to ignore the Flags :confused:

[ucomesdag]

Works well in Windows Xp , but as I mentioned first, It does not work in KDE. KDE seems to ignore the Flags :confused:

It got it running fine in KDE maximize button is gone as in windows it's only disabled.

[sunil.thaha]

I am using KDE 3.3.1 with Plastique Theme, See the screen shot. The maximize button is still there

[Djony]

Thank you, ucomesdag! Is there way to make it disappear completely?

[vishal.chauhan]

You can set same maximum and minimum size As.

MainForm *MainFormObj=new MainForm(0);
MainFormObj->show();

MainFormObj->setMaximumSize (849,626);
MainFormObj->setMinimumSize (849,626);

I think it will work.I m using this on my mac using qt 4.2.2.

[Djony]

Tried it. It doesn't work on WinXP.

[vishal.chauhan]

what is Happening when you r doing this.
Is there is an error?
Actually I am running it correctly and donot know why it is not working in XP.

check one thing that U also set the geometry of main window as

MainForm *MainFormObj=new MainForm(0);
MainFormObj->show();

MainFormObj->setMaximumSize (849,626);
MainFormObj->setMinimumSize (849,626);

MainFormObj->setGeometry(5,42,849,626); //add this line

Try this.

[ucomesdag]

I am using KDE 3.3.1 with Plastique Theme, See the screen shot. The maximize button is still there

Might be the version of KDE I got 3.5.5 running and it works.


Thank you, ucomesdag! Is there way to make it disappear completely?

On windows XP it just disables the button but it doesn't disappear.

[netmat]

Hi Sunil.thaha,

How did you solve the above problem? Could you manage to make the maximize button disappeared?

Regards,
~NM

[faldzip]

Read about Qt::WindowFlags

[netmat]

hi,

Those flags are not working properly. those working fine on windows but not on Mac. Even I am not being able to have close button on mac.
I hv posted my code here. http://www.qtcentre.org/threads/29900-close-button-not-there-in-Mac-but-its-in-window?p=140063#post140063


thanks anyway.

[sherifomran]

check this example
http://doc.qt.io/qt-5/qtwidgets-widgets-windowflags-example.html

you should use
qt::window | qt::windowminimizebuttonhint | qt::closebuttonhint | qt::customizewindowhint


you can not remove the maximize button without the customizewindowhint