C++ (Cpp) QPixmap::x11SetScreen Exemples

Exemple #1

/*!
  \return A pixmap that can be used as backing store

  \param widget Widget, for which the backinstore is intended
  \param size Size of the pixmap
 */
QPixmap QwtPainter::backingStore( QWidget *widget, const QSize &size )
{
    QPixmap pm;

#define QWT_HIGH_DPI 1

#if QT_VERSION >= 0x050000 && QWT_HIGH_DPI
    qreal pixelRatio = 1.0;

    if ( widget && widget->windowHandle() )
    {
        pixelRatio = widget->windowHandle()->devicePixelRatio();
    }
    else
    {
        if ( qApp )
            pixelRatio = qApp->devicePixelRatio();
    }

    pm = QPixmap( size * pixelRatio );
    pm.setDevicePixelRatio( pixelRatio );
#else
    Q_UNUSED( widget )
    pm = QPixmap( size );
#endif

#if 0
#ifdef Q_WS_X11
    if ( pm.x11Info().screen() != x11Info().screen() )
         pm.x11SetScreen( x11Info().screen() );
#endif
#endif

    return pm;
}