Apply Button Position in QDialogButtonBox

Question

I would like to have QDialogButtonBoxwith three buttons in this particular order:

Ok | Apply | Cancel

Can I reorder buttons to Applycenter?

Answer 1

The layout of the button is platform specific.

Windows - Ok | Cancel | Apply
OS X - Apply | Cancel | Ok
KDE - Ok | Apply | Cancel
GNOME - Apply | Cancel | Ok

There are two ways to force the use of a custom layout.

You can subclass QProxyStyleand override the styleHint method to provide a custom style for QStyle::SH_DialogButtonLayoutstyleHint.

class KdeStyle : public QProxyStyle
{
public:
    virtual int styleHint(StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const override
    {
        if (stylehint == SH_DialogButtonLayout)
            return QDialogButtonBox::KdeLayout;

        return QProxyStyle::styleHint(stylehint, opt, widget, returnData);
    }
};

Then apply a custom style to the application.

qApp->setStyle(new KdeStyle());

- . button-layout QDialogButtonBox QMessageBox. : 0 (WinLayout), 1 (MacLayout), 2 (KdeLayout) 3 (GnomeLayout).

QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Apply | QDialogButtonBox::Cancel);
buttonBox->setStyleSheet("* { button-layout: 2 }");