How to remove maximize button in Mac OS X tool window in Qt

Question

I have a floating tool window. It works fine on Windows, but I can't get rid of the maximise button on Mac OS X. I have tried unsetting Qt::WindowMaximizeButtonHint and setting the window to fixed size. Nothing seems to work.

MyWidget::MyWidget( QWidget* parent )
:QWidget( parent, Qt::Tool | Qt::CustomizeWindowHint )
{
   setupUi( this );

   setFixedSize( sizeHint() ); // doesn't remove maximise button
   setWindowFlags( windowFlags() & ~Qt::WindowMaximizeButtonHint ); // doesn't remove maximise button
}

I don't want to use a frameless window. Any ideas? I am using Qt 4.4.

Answer 1

You could try setting the window flag to include Qt::Dialog (bold added):

Indicates that the widget is a window that should be decorated as a dialog (i.e., typically no maximize or minimize buttons in the title bar). This is the default type for QDialog. If you want to use it as a modal dialog, it should be launched from another window, or have a parent and used with the QWidget::windowModality property. If you make it modal, the dialog will prevent other top-level windows in the application from getting any input. We refer to a top-level window that has a parent as a secondary window.

I don't know what would happen if you tried setting both Qt::Dialog and Qt::Tool, but it might be worth investigating.

Answer 2

Launch Qt windowflags example application. Choose Tool radio button and then check:

• Window title
• Customize window
• Window close button

It's the only way I found on Mac OS X to achieve what you want BUT you will loose minimize button. There's no other way. That's Mac OS X Window Manager limitation.

Summarizing, there are only five sets of buttons in title bar:

1. All buttons visible and all buttons enabled: setWindowFlags(Qt::Tool)
2. All buttons visible, close and maximize buttons enabled, minimize button disabled: setWindowFlags(Qt::Tool | Qt::WindowTitleHint | Qt::WindowMaximizeButtonHint | Qt::WindowCloseButtonHint | Qt::CustomizeWindowHint)
3. All buttons visible, maximize button enabled, close and minimize disabled: setWindowFlags(Qt::Tool | Qt::WindowTitleHint | Qt::WindowMaximizeButtonHint | Qt::CustomizeWindowHint)
4. Only close button is visible and enabled setWindowFlags(Qt::Tool | Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::CustomizeWindowHint)
5. No buttons in title bar: setWindowFlags(Qt::Tool | Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::CustomizeWindowHint)

Answer 3

This code from Richard Gustavsen of Nokia works in Qt 4.4:

class MyWidget : public QWidget
{
    public:

    MyWidget::MyWidget( QWidget* parent ) : QWidget(parent, Qt::Tool)
    {
    }

    void setVisible(bool visible)
    {
        QWidget::setVisible(visible);
        ChangeWindowAttributes(qt_mac_window_for(this), kWindowNoAttributes, kWindowFullZoomAttribute);
    }
};

Thanks Richard and Nokia!

Answer 4

I was able to do it with

setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::CustomizeWindowHint | Qt::WindowCloseButtonHint | Qt::WindowMinimizeButtonHint)

Regards, Esteban

Answer 5

So there is no way to hide or remove maximize button(not just disabling) with out loosing the minimize buttton? (I want it on all platforms- mac, win, linux)

any pointer to any paltform specific stuff or work around?

Best Regards, Alex