C++ QSvgGenerator::setOutputDevice方法代码示例

bool ExportHtml::convertEmf(QByteArray &input, QByteArray &output, QSize size)
{
    QBuffer *outBuf = new QBuffer(&output);
    QSvgGenerator generator;
    generator.setOutputDevice(outBuf);
    generator.setSize(QSize(200, 200));
    generator.setTitle("Svg image");
    generator.setDescription("This is an svg image that is converted from EMF by Calligra");

    Libemf::Parser  emfParser;

    QPainter painter;

    if (!painter.begin(&generator)) {
        kDebug(30503) << "Can not open the painter";
        return false;
    }

    painter.scale(50,50);
    Libemf::OutputPainterStrategy  emfPaintOutput(painter, size, true );
    emfParser.setOutput( &emfPaintOutput );
    if (!emfParser.load(input)) {
        kDebug(30503) << "Can not Parse the EMF file";
        return false;
    }
    painter.end();

    return true;
}

bool ExportHtml::convertWmf(QByteArray &input, QByteArray &output, QSizeF size)
{
    QBuffer *outBuf = new QBuffer(&output);
    QSvgGenerator generator;
    generator.setOutputDevice(outBuf);
    generator.setSize(QSize(200, 200));
    generator.setTitle("Svg image");
    generator.setDescription("This is an svg image that is converted from WMF by Calligra");

    QPainter painter;

    if (!painter.begin(&generator)) {
        kDebug(30503) << "Can not open the painter";
        return false;
    }

    painter.scale(50,50);
    Libwmf::WmfPainterBackend  wmfPainter(&painter, size);
    if (!wmfPainter.load(input)) {
        kDebug(30503) << "Can not Parse the WMF file";
        return false;
    }

    // Actually paint the WMF.
    painter.save();
    wmfPainter.play();
    painter.restore();
    painter.end();

    return true;
}

void flowwidget::SaveSVG(std::ostream &data) {
    std::cerr << "[FlowWidget] Request to export recieved, enumerating nodes for size" << std::endl;
    int GenMinimum = INT_MAX;
    int GenExtreme = INT_MIN;
    std::for_each(XMLHandlr->OrphanNodes.begin(), XMLHandlr->OrphanNodes.end(),
                  [&](std::pair<std::string, FlowNode> nodepair) {
        NodeSize ns = getNodeSize(QFont("sans-serif", BaseFontSize*nodepair.second.FontSizeMult), QFont("sans-serif", BaseFontSize*nodepair.second.FontSizeMult*1.5), nodepair.second);

        if (nodepair.second.CenterPosX - (ns.Width/2) < GenMinimum)
            GenMinimum = nodepair.second.CenterPosX - (ns.Width/2);
        if (nodepair.second.CenterPosY - (ns.Height/2) < GenMinimum)
            GenMinimum = nodepair.second.CenterPosY - (ns.Height/2);
        if (nodepair.second.CenterPosX + (ns.Width/2) > GenExtreme)
            GenExtreme = nodepair.second.CenterPosX + (ns.Width/2);
        if (nodepair.second.CenterPosY + (ns.Height/2) > GenExtreme)
            GenExtreme = nodepair.second.CenterPosY + (ns.Height/2);
    });
    int SVGSize = GenExtreme-GenMinimum;
    std::cerr << "[FlowWidget] Calculated sheet size of " << SVGSize << std::endl;

    QSvgGenerator svgen;
    QIODevice* iodev = new IOStreamBridge(data);
    svgen.setOutputDevice(iodev);
    svgen.setSize(QSize(SVGSize, SVGSize));
    renderFullTree(&svgen, XMLHandlr,
                   LineColor, BaseFontSize, "",
                   SVGSize, SVGSize, PermaScale, 1, 0, 0);
    data.flush();
    std::cerr << "[FlowWidget] Finished export!" << std::endl;
}

bool ExportHtml::convertSvm(QByteArray &input, QByteArray &output, QSize size)
{

    QBuffer *outBuf = new QBuffer(&output);
    QSvgGenerator generator;
    generator.setOutputDevice(outBuf);
    generator.setSize(QSize(200, 200));
    generator.setTitle("Svg image");
    generator.setDescription("This is an svg image that is converted from svm by Calligra");

    Libsvm::SvmParser  svmParser;

    QPainter painter;

    if (!painter.begin(&generator)) {
        kDebug(30503) << "Can not open the painter";
        return false;
    }

    painter.scale(50,50);
    Libsvm::SvmPainterBackend svmPainterBackend(&painter, size);
    svmParser.setBackend(&svmPainterBackend);
    if (!svmParser.parse(input)) {
        kDebug(30503) << "Can not Parse the Svm file";
        return false;
    }
    painter.end();

    return true;
}

void MainWindow::loadPath( const QPainterPath &path )
{
    QBuffer buf;

    QSvgGenerator generator;
    generator.setOutputDevice( &buf );

    QPainter painter( &generator );
    painter.setRenderHint( QPainter::Antialiasing, false );
    painter.setPen( QPen( Qt::blue, 0 ) );
    painter.setBrush( Qt::darkCyan );
    painter.drawPath( path );
    painter.end();

    d_canvas[0]->setSvg( buf.data() );
    d_canvas[1]->setSvg( buf.data() );
}

static PyObject *meth_QSvgGenerator_setOutputDevice(PyObject *sipSelf, PyObject *sipArgs)
{
    PyObject *sipParseErr = NULL;

    {
        QIODevice* a0;
        QSvgGenerator *sipCpp;

        if (sipParseArgs(&sipParseErr, sipArgs, "BJ8", &sipSelf, sipType_QSvgGenerator, &sipCpp, sipType_QIODevice, &a0))
        {
            sipCpp->setOutputDevice(a0);

            Py_INCREF(Py_None);
            return Py_None;
        }
    }

    /* Raise an exception if the arguments couldn't be parsed. */
    sipNoMethod(sipParseErr, sipName_QSvgGenerator, sipName_setOutputDevice, doc_QSvgGenerator_setOutputDevice);

    return NULL;
}

QDomNode WbNewItem::serializeToSvg(QDomDocument *doc) {
	if(!graphicsItem()) {
		return QDomDocumentFragment();
	}

	// Generate the SVG using QSvgGenerator
	QBuffer buffer;

	QSvgGenerator generator;
	generator.setOutputDevice(&buffer);

	QPainter painter;
	QStyleOptionGraphicsItem options;
	painter.begin(&generator);
	graphicsItem()->paint(&painter, &options);
	painter.end();

	// qDebug("Serialized SVG doc:");
	// qDebug(buffer.buffer());

	// Parse the children of the new root <svg/> from the buffer to a document fragment
	// also add an 'id' attribute to each of the children
	doc->setContent(buffer.buffer());
	QDomDocumentFragment fragment = doc->createDocumentFragment();

	for(QDomNode n = doc->documentElement().lastChild(); !n.isNull(); n = n.previousSibling()) {
		// skip <title/>, <desc/>, and <defs/>
		if(n.isElement() &&
			!(n.nodeName() == "title"
				|| n.nodeName() == "desc"
				|| n.nodeName() == "defs")) {
			n.toElement().setAttribute("id", "e" + SxeSession::generateUUID());
			fragment.insertBefore(n, QDomNode());
		}
	}

	return fragment;
}

/* ------- Копировать в буфер ЗОЗ ------- */
void ViewPlot::copyToBuffer()
{
    QBuffer b;
    QClipboard *clipboard = QApplication::clipboard();
    QSvgGenerator p;
    p.setOutputDevice(&b);
    p.setSize(QSize(800,800));
    p.setViewBox(QRect(0,0,800,800));

    QPainter painter;
    QwtPlotRenderer renderer;

    painter.begin(&p);
    painter.setRenderHint(QPainter::Antialiasing);
    renderer.render(ui->qwtPlot_spectrogram,&painter,QRect(0,0,800,800));
    painter.end();

    QMimeData * d = new QMimeData();
    d->setData("image/svg+xml",b.buffer());
    d->setData("image/svg+xml-compressed", b.buffer());
    d->setImageData(QPixmap::grabWidget(ui->qwtPlot_spectrogram, 0,0,-1,-1));

    clipboard->setMimeData(d,QClipboard::Clipboard);
}

void MusicShape::saveOdf( KoShapeSavingContext & context ) const
{
    // The name of this object in the ODF file.
    KoEmbeddedDocumentSaver &fileSaver = context.embeddedSaver();
    QString objectName = fileSaver.getFilename("Object");

    KoXmlWriter& writer = context.xmlWriter();
    writer.startElement("draw:frame");
    saveOdfAttributes(context, OdfAllAttributes);

    writer.startElement("music:shape");
    writer.addAttribute("xmlns:music", "http://www.calligra.org/music");
    MusicXmlWriter().writeSheet(writer, m_sheet, false);
    writer.endElement(); // music:shape

    const qreal previewZoom = 150 / 72.; // 150 DPI
    QSizeF imgSize = size(); // in points
    imgSize *= previewZoom;
    KoViewConverter converter;
    
    // Save a preview SVG image.
    // -------------------------

    // 1. Set up the svg renderer.
    QByteArray svgContents;           // The contents
    QBuffer svgBuffer(&svgContents);  // The corresponding QIODevice
    QSvgGenerator svg;
    svg.setOutputDevice(&svgBuffer);  // Write to the buffer
    svg.setSize(imgSize.toSize());
    svg.setViewBox(QRect(0, 0, boundingRect().width(), boundingRect().height()));
        
    // 2. Paint the svg preview image.
    //
    // We need to create all text as paths, because otherwise it
    // will be difficult for most people to preview the SVG
    // image. Not many people have music fonts installed.
    QPainter svgPainter;
    svgPainter.begin(&svg);
    svgPainter.setRenderHint(QPainter::Antialiasing);
    svgPainter.setRenderHint(QPainter::TextAntialiasing);
    m_style->setTextAsPath(true);
    constPaint(svgPainter, converter);
    m_style->setTextAsPath(false);
    svgPainter.end();

    // 3. Create the xml to embed the svg image and the contents to the file.
    writer.startElement("draw:image");
    QString name = QString("ObjectReplacements/") + objectName + ".svg";
    writer.addAttribute("xlink:type", "simple" );
    writer.addAttribute("xlink:show", "embed" );
    writer.addAttribute("xlink:actuate", "onLoad");
    writer.addAttribute("xlink:href", name);
    writer.endElement(); // draw:image
    fileSaver.saveFile(name, "image/svg+xml", svgContents);

    // Save a preview bitmap image.
    // ----------------------------

    // 1. Create the image.
    QImage img(imgSize.toSize(), QImage::Format_ARGB32);
    QPainter painter(&img);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.setRenderHint(QPainter::TextAntialiasing);
    converter.setZoom(previewZoom);
    constPaint(painter, converter);

    // 2. Create the xml to embed the svg image and the contents to the file.
    writer.startElement("draw:image");
    name = context.imageHref(img);
    // FIXME: Find out how to save a picture using the embeddedSaver and saveFile()
    //name = QString("ObjectReplacements/") + objectName + ".png";
    writer.addAttribute("xlink:type", "simple" );
    writer.addAttribute("xlink:show", "embed" );
    writer.addAttribute("xlink:actuate", "onLoad");
    writer.addAttribute("xlink:href", name);
    writer.endElement(); // draw:image

    saveOdfCommonChildElements(context);
    writer.endElement(); // draw:frame
}

    MySymbol( QwtSymbol::Style style, const QBrush &brush )
    {
        QPen pen( Qt::black, 0 );
        pen.setJoinStyle( Qt::MiterJoin );
        pen.setCosmetic( true );

        QPainterPath path = createArrow( QSize( 16, 24 ) );

        const QSizeF pathSize = path.boundingRect().size();

        setSize( 0.8 * pathSize.toSize() );

        setPinPoint( QPointF( 0.0, 0.0 ) );

        switch( style )
        {
            case QwtSymbol::Pixmap:
            {
                const QSize sz = size();

                const double ratio = qMin( sz.width() / pathSize.width(),
                    sz.height() / pathSize.height() );

                QTransform transform;
                transform.scale( ratio, ratio );

                path = transform.map( path );

                if ( isPinPointEnabled() )
                {
                    QPointF pos = transform.map( pinPoint() );
                    setPinPoint( pos );
                }

                const QRectF br = path.boundingRect();

                int m = 2 + qCeil( pen.widthF() );

                QPixmap pm( sz + QSize( 2 * m, 2 * m ) );
                pm.fill( Qt::transparent );

                QPainter painter( &pm );
                painter.setRenderHint( QPainter::Antialiasing, true );
                
                painter.setPen( pen ); 
                painter.setBrush( brush );

                painter.translate( m, m );
                painter.translate( -br.left(), br.top() );
                painter.drawPath( path );
                
                setPixmap( pm );
                setSize( pm.size() );
                if ( isPinPointEnabled() )
                    setPinPoint( pinPoint() + QPointF( m, m ) );

                break;
            }
            case QwtSymbol::Graphic:
            {
                QwtGraphic graphic;
                graphic.setRenderHint( QwtGraphic::RenderPensUnscaled );
        
                QPainter painter( &graphic );
                painter.setRenderHint( QPainter::Antialiasing, true );
                painter.setPen( pen ); 
                painter.setBrush( brush );
        
                painter.drawPath( path );
                painter.end();
        
                setGraphic( graphic );
                break;
            }
            case QwtSymbol::SvgDocument:
            {
                QBuffer buf;

                QSvgGenerator generator;
                generator.setOutputDevice( &buf );

                QPainter painter( &generator );
                painter.setRenderHint( QPainter::Antialiasing, true );
                painter.setPen( pen );
                painter.setBrush( brush );

                painter.drawPath( path );
                painter.end();

                setSvgDocument( buf.data() );
                break;
            }
            case QwtSymbol::Path:
            default:
            {
                setPen( pen );
                setBrush( brush );
                setPath( path );
            }
        }
//.........这里部分代码省略.........