qt5base-lts/examples/qws/svgalib/svgalibpaintdevice.cpp

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#include "svgalibpaintdevice.h"
#include "svgalibpaintengine.h"

#include <QApplication>
#include <QDesktopWidget>

SvgalibPaintDevice::SvgalibPaintDevice(QWidget *w)
    : QCustomRasterPaintDevice(w)
{
    pengine = new SvgalibPaintEngine(this);
}

SvgalibPaintDevice::~SvgalibPaintDevice()
{
    delete pengine;
}

int SvgalibPaintDevice::metric(PaintDeviceMetric m) const
{
    if (m == PdmWidth)
        return QApplication::desktop()->screenGeometry().width();
    else if (m == PdmHeight)
        return QApplication::desktop()->screenGeometry().height();
    return QCustomRasterPaintDevice::metric(m);
}