C++ QPrinter::setResolution方法代码示例

void Matrix::exportVector(const QString& fileName, int res, bool color)
{
	if ( fileName.isEmpty() ){
		QMessageBox::critical(this, tr("QtiPlot - Error"), tr("Please provide a valid file name!"));
        return;
	}

	QPrinter printer;
    printer.setCreator("QtiPlot");
	printer.setFullPage(true);
	if (res)
		printer.setResolution(res);

    printer.setOutputFileName(fileName);
    if (fileName.contains(".eps"))
    	printer.setOutputFormat(QPrinter::PostScriptFormat);

    if (color)
		printer.setColorMode(QPrinter::Color);
	else
		printer.setColorMode(QPrinter::GrayScale);

	printer.setOrientation(QPrinter::Portrait);

    int cols = numCols();
    int rows = numRows();
    QRect rect = QRect(0, 0, cols, rows);
    printer.setPaperSize(QSizeF(cols, rows), QPrinter::DevicePixel);

    QPainter paint(&printer);
    paint.drawImage(rect, d_matrix_model->renderImage());
    paint.end();
}

void MultiLayer::exportToEPS(const QString& fname, int res, QPrinter::Orientation o, 
						QPrinter::PageSize pageSize, QPrinter::ColorMode col)
{	
QPrinter printer;
printer.setResolution(res);
printer.setPageSize(pageSize);
printer.setColorMode(col);
printer.setOrientation(o);
	
printer.setFullPage(TRUE);
printer.setOutputToFile (TRUE);
printer.setOutputFileName(fname);

QPainter paint(&printer);
QPaintDeviceMetrics pdmTo(&printer);

int dpiy = pdmTo.logicalDpiY();
int margin = (int) ( (0.5/2.54)*dpiy ); // 5 mm margins
	
QSize size = canvas->size();

double scaleFactorX=(double)(pdmTo.width() - 2*margin)/(double)size.width();
double scaleFactorY=(double)(pdmTo.height() - 2*margin)/(double)size.height();
	
for (int i=0;i<(int)graphsList->count();i++)
		{
		Graph *gr=(Graph *)graphsList->at(i);
		Plot *myPlot= (Plot *)gr->plotWidget();
			
		PrintFilter  filter(myPlot); 
	    filter.setOptions(QwtPlotPrintFilter::PrintAll | QwtPlotPrintFilter::PrintTitle 
						| QwtPlotPrintFilter::PrintCanvasBackground);

		QPoint pos=gr->pos();
		pos=QPoint(int(margin + pos.x()*scaleFactorX),int(margin + pos.y()*scaleFactorY));
	
		int width=int(myPlot->frameGeometry().width()*scaleFactorX);
		int height=int(myPlot->frameGeometry().height()*scaleFactorY);

		QRect rect = QRect(pos,QSize(width,height));

		if (myPlot->paletteBackgroundColor() != QColor(white))
			paint.fillRect(rect, myPlot->paletteBackgroundColor());

		int lw = myPlot->lineWidth();
		if ( lw > 0)
			{			
			myPlot->printFrame(&paint, rect);
				
			rect.moveBy ( lw, lw);
			rect.setWidth(rect.width() - 2*lw);
			rect.setHeight(rect.height() - 2*lw);
			}
		
		myPlot->print(&paint, rect, filter);
		}

if (hasOverlapingLayers())		
	updateTransparency();
}

void QgsComposition::beginPrint( QPrinter &printer )
{
  //set resolution based on composer setting
  printer.setFullPage( true );
  printer.setColorMode( QPrinter::Color );

  //set user-defined resolution
  printer.setResolution( printResolution() );
}

void SchedulePrintDialog::setupPdfPrinter( QPrinter & printer )
{
	printer.setOutputFormat( QPrinter::PdfFormat );
	setupPrinter(printer);

	printer.setFullPage( true );
	printer.setResolution( mDpiSpin->value() );
	printer.setFontEmbeddingEnabled(false);
}

void OpenInfraPlatform::UserInterface::Alignment2DScene::exportToFile(QWidget* parent)
{
	QString filter;
	QString fn = QFileDialog::getSaveFileName(parent, tr("Save Vertical Alignment as..."), QString(), tr("PNG File (*.png);; JPG File (*.jpg);; PDF File (*.pdf);; SVG File (*.svg)"), &filter);
	if(fn.isEmpty())
		return;

	if(filter == "PNG File (*.png)" || filter == "JPG File (*.jpg)")
	{
		QImage image(sceneRect().size().toSize(), QImage::Format::Format_ARGB32);
		image.fill(Qt::darkGray);

		QPainter painter(&image);
		painter.setRenderHints(QPainter::Antialiasing);
		render(&painter);
		image.save(fn);
	}
	else
	{
		QPrinter printer;
		QSvgGenerator svgGen;

		QPaintDevice* device;
		if(filter == "PDF File (*.pdf)")
		{
			printer.setResolution(QPrinter::HighResolution);
			printer.setPageSize( QPrinter::A4 );
			printer.setOrientation( QPrinter::Landscape );
			printer.setOutputFormat( QPrinter::PdfFormat );
			printer.setOutputFileName(fn);

			device = &printer;
		}
		else if(filter == "SVG File (*.svg)")
		{
			QRectF rect = sceneRect(); 

			svgGen.setFileName(fn);
			svgGen.setSize(QSize(rect.width(),rect.height()));
			svgGen.setViewBox(QRect(0,0,rect.width(),rect.height()));
			svgGen.setTitle("Vertical Alignment");			
			
			device = &svgGen;
		}
		else
		{
			return;
		}

		QPainter painter(device);

		configureColors(A2D_DrawState::A2D_Print);
		render(&painter);
		configureColors(A2D_DrawState::A2D_Draw);
	}
}

void UBExportFullPDF::saveOverlayPdf(UBDocumentProxy* pDocumentProxy, const QString& filename)
{
    if (!pDocumentProxy || filename.length() == 0 || pDocumentProxy->pageCount() == 0)
        return;

    //PDF
    qDebug() << "exporting document to PDF Merger" << filename;
    QPrinter pdfPrinter;

    pdfPrinter.setOutputFormat(QPrinter::PdfFormat);
    pdfPrinter.setResolution(UBSettings::settings()->pdfResolution->get().toInt());
    pdfPrinter.setOutputFileName(filename);
    pdfPrinter.setFullPage(true);

    QPainter* pdfPainter = 0;

    for(int pageIndex = 0 ; pageIndex < pDocumentProxy->pageCount(); pageIndex++)
    {
        UBGraphicsScene* scene = UBPersistenceManager::persistenceManager()->loadDocumentScene(pDocumentProxy, pageIndex);
        // set background to white, no grid for PDF output
        bool isDark = scene->isDarkBackground();
        bool isCrossed = scene->isCrossedBackground();
        scene->setBackground(false, false);

        // set high res rendering
        scene->setRenderingQuality(UBItem::RenderingQualityHigh);
        scene->setRenderingContext(UBGraphicsScene::PdfExport);

		QSize pageSize = scene->nominalSize();

		UBGraphicsPDFItem *pdfItem = qgraphicsitem_cast<UBGraphicsPDFItem*>(scene->backgroundObject());

        if (pdfItem) mHasPDFBackgrounds = true;
        
		pdfPrinter.setPaperSize(QSizeF(pageSize.width()*mScaleFactor, pageSize.height()*mScaleFactor), QPrinter::Point);

        if (!pdfPainter) pdfPainter = new QPainter(&pdfPrinter);

		if (pageIndex != 0) pdfPrinter.newPage();

        //render to PDF
        scene->setDrawingMode(true);
        scene->render(pdfPainter, QRectF(), scene->normalizedSceneRect());

        //restore screen rendering quality
        scene->setRenderingContext(UBGraphicsScene::Screen);
        scene->setRenderingQuality(UBItem::RenderingQualityNormal);

        //restore background state
        scene->setDrawingMode(false);
        scene->setBackground(isDark, isCrossed);
    }

    if (pdfPainter) delete pdfPainter;
}

bool UBExportPDF::persistsDocument(UBDocumentProxy* pDocumentProxy, const QString& filename)
{
    QPrinter pdfPrinter;

    qDebug() << "exporting document to PDF" << filename;

    pdfPrinter.setOutputFormat(QPrinter::PdfFormat);
    pdfPrinter.setResolution(UBSettings::settings()->pdfResolution->get().toInt());
    pdfPrinter.setOutputFileName(filename);
    pdfPrinter.setFullPage(true);

    //need to calculate screen resolution
    QDesktopWidget* desktop = UBApplication::desktop();
    int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
    float scaleFactor = 72.0f / dpiCommon;
    
    QPainter pdfPainter;
    bool painterNeedsBegin = true;

    int existingPageCount = pDocumentProxy->pageCount();

    for(int pageIndex = 0 ; pageIndex < existingPageCount; pageIndex++)
    {
        UBGraphicsScene* scene = UBPersistenceManager::persistenceManager()->loadDocumentScene(pDocumentProxy, pageIndex);
        UBApplication::showMessage(tr("Exporting page %1 of %2").arg(pageIndex + 1).arg(existingPageCount));
        // set background to white, no crossing for PDF output
        bool isDark = scene->isDarkBackground();
        bool isCrossed = scene->isCrossedBackground();
        scene->setBackground(false, false);

        QSize pageSize = scene->nominalSize();

        // set high res rendering
        scene->setRenderingQuality(UBItem::RenderingQualityHigh);
        scene->setRenderingContext(UBGraphicsScene::NonScreen);

        //setting page size to appropriate value
        pdfPrinter.setPaperSize(QSizeF(pageSize.width()*scaleFactor, pageSize.height()*scaleFactor), QPrinter::Point);
        if(painterNeedsBegin) painterNeedsBegin = !pdfPainter.begin(&pdfPrinter);
        //render to PDF
        scene->render(&pdfPainter, QRectF(), scene->normalizedSceneRect());

        if (pageIndex < existingPageCount - 1) pdfPrinter.newPage();

        //restore screen rendering quality
        scene->setRenderingContext(UBGraphicsScene::Screen);
        scene->setRenderingQuality(UBItem::RenderingQualityNormal);

        //restore background state
        scene->setBackground(isDark, isCrossed);
    }
    if(!painterNeedsBegin) pdfPainter.end();

    return true;
}

bool Phantom::renderPdf(const QString &fileName)
{
    QPrinter printer;
    printer.setOutputFormat(QPrinter::PdfFormat);
    printer.setOutputFileName(fileName);
    printer.setResolution(PHANTOMJS_PDF_DPI);
    QVariantMap paperSize = m_paperSize;

    if (paperSize.isEmpty()) {
        const QSize pageSize = m_page.mainFrame()->contentsSize();
        paperSize.insert("width", QString::number(pageSize.width()) + "px");
        paperSize.insert("height", QString::number(pageSize.height()) + "px");
        paperSize.insert("border", "0px");
    }

    if (paperSize.contains("width") && paperSize.contains("height")) {
        const QSizeF sizePt(ceil(stringToPointSize(paperSize.value("width").toString())),
                            ceil(stringToPointSize(paperSize.value("height").toString())));
        printer.setPaperSize(sizePt, QPrinter::Point);
    } else if (paperSize.contains("format")) {
        const QPrinter::Orientation orientation = paperSize.contains("orientation")
                && paperSize.value("orientation").toString().compare("landscape", Qt::CaseInsensitive) == 0 ?
                    QPrinter::Landscape : QPrinter::Portrait;
        printer.setOrientation(orientation);
        static const struct {
            QString format;
            QPrinter::PaperSize paperSize;
        } formats[] = {
            { "A3", QPrinter::A3 },
            { "A4", QPrinter::A4 },
            { "A5", QPrinter::A5 },
            { "Legal", QPrinter::Legal },
            { "Letter", QPrinter::Letter },
            { "Tabloid", QPrinter::Tabloid }
        };
        printer.setPaperSize(QPrinter::A4); // Fallback
        for (uint i = 0; i < sizeof(formats) / sizeof(formats[0]); ++i) {
            if (paperSize.value("format").toString().compare(formats[i].format, Qt::CaseInsensitive) == 0) {
                printer.setPaperSize(formats[i].paperSize);
                break;
            }
        }
    } else {
        return false;
    }

    const qreal border = paperSize.contains("border") ?
                floor(stringToPointSize(paperSize.value("border").toString())) : 0;
    printer.setPageMargins(border, border, border, border, QPrinter::Point);

    m_page.mainFrame()->print(&printer);
    return true;
}

void MainWindow::on_actionPrint_triggered(bool)
{
	//no nothing without images
	if (images_.count()==0) return;

	QPrinter printer;
	printer.setResolution(180);
	printer.setPaperSize(QPrinter::A4);
	printer.setOrientation(QPrinter::Portrait);
	QPrintPreviewDialog dlg(&printer, this);
	dlg.setWindowFlags ( Qt::Window );
	connect(&dlg, SIGNAL(paintRequested(QPrinter*)), SLOT(printPreview(QPrinter *)));
	if(dlg.exec() == QDialog::Rejected) return;
}

void MultiLayer::print()
{
QPrinter printer;
printer.setResolution(84);
printer.setOrientation(QPrinter::Landscape);
printer.setColorMode (QPrinter::Color);
printer.setFullPage(TRUE);

if (printer.setup())
	{
	QPainter paint(&printer);	
	printAllLayers(&paint);
	paint.end();	
	}		
}

void
MSPeaksWnd::handlePrintCurrentView( const QString& pdfname )
{
	// A4 := 210mm x 297mm (8.27 x 11.69 inch)
	QSizeF sizeMM( 260, 160 ); // 260x160mm 

    int resolution = 300;
	const double mmToInch = 1.0 / 25.4;
    const QSizeF size = sizeMM * mmToInch * resolution;
    double margin_left = 0.2 /* inch */ * resolution;
    //double margin_right = ( 8.27 - 0.2 ) * resolution;
    //double margin_center = (margin_right - margin_left) / 2 + margin_left;

	QPrinter printer;
    printer.setColorMode( QPrinter::Color );
    printer.setPaperSize( QPrinter::A4 );
    printer.setFullPage( false );
	printer.setOrientation( QPrinter::Landscape );
    
    printer.setDocName( "QtPlatz MS Peaks" );
    printer.setOutputFileName( pdfname );
    printer.setResolution( resolution );

    //-------------------- 
    QPainter painter( &printer );
    int n = 0;
    for ( auto& plot: plots_ ) {
        QRectF boundingRect;
        QRectF drawRect( margin_left, 0.0, printer.width() / 2.0, printer.height() );
        if ( n++ & 01 ) {
			drawRect.moveLeft( printer.width() / 2.0 );
            painter.drawText( drawRect, Qt::TextWordWrap, "Relationship between time and flight length", &boundingRect );
        } else {
            painter.drawText( drawRect, Qt::TextWordWrap, "Relationship between time and m/z", &boundingRect );
        }
        QwtPlotRenderer renderer;
        renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasBackground, true );
        renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasFrame, true );
        renderer.setDiscardFlag( QwtPlotRenderer::DiscardBackground, true );
        
        drawRect.setTop( boundingRect.bottom() );
        drawRect.setHeight( size.height() );
        drawRect.setWidth( size.width() / 2 );
        renderer.render( plot.get(), &painter, drawRect ); // render plot
    }
}

void QgsComposition::print( QPrinter &printer )
{
  //set resolution based on composer setting
  printer.setFullPage( true );
  printer.setColorMode( QPrinter::Color );

  //set user-defined resolution
  printer.setResolution( printResolution() );

  QPainter p( &printer );

  //QgsComposition starts page numbering at 0
  int fromPage = ( printer.fromPage() < 1 ) ? 0 : printer.fromPage() - 1 ;
  int toPage = ( printer.toPage() < 1 ) ? numPages() - 1 : printer.toPage() - 1;

  if ( mPrintAsRaster )
  {
    for ( int i = fromPage; i <= toPage; ++i )
    {
      if ( i > fromPage )
      {
        printer.newPage();
      }

      QImage image = printPageAsRaster( i );
      if ( !image.isNull() )
      {
        QRectF targetArea( 0, 0, image.width(), image.height() );
        p.drawImage( targetArea, image, targetArea );
      }
    }
  }

  if ( !mPrintAsRaster )
  {
    for ( int i = fromPage; i <= toPage; ++i )
    {
      if ( i > fromPage )
      {
        printer.newPage();
      }
      renderPage( &p, i );
    }
  }
}

void keyPrograms_form::printQuickPCs() {

  QPrinter *printer = new QPrinter();
  printer->setOrientation( QPrinter::Portrait );
  printer->setResolution( 600 );
  // printer->setOutputFormat( QPrinter::PostScriptFormat );
  
  QPrintDialog *dialog = new QPrintDialog( printer, this );
  dialog->setWindowTitle( tr( "Print EWI Quick Patch Changes" ) );

  if ( dialog->exec() != QDialog::Accepted ) return;

  // Create a QPainter object to draw on the printer
  QPainter p( printer );
  QPixmap  pm;
    
  pm = QPixmap::grabWidget( this ).scaledToWidth( printer->width() );
  p.drawPixmap( 0, 0, pm );
    //p.rotate( 90.0 );
  p.end();
}

void TextEdit::filePrint()
{
    if ( !currentEditor() )
	return;
#ifndef QT_NO_PRINTER
    QPrinter printer;
    printer.setFullPage(TRUE);
    QPaintDeviceMetrics screen( this );
    printer.setResolution( screen.logicalDpiY() );
    if ( printer.setup( this ) ) {
	QPainter p( &printer );
	QPaintDeviceMetrics metrics( p.device() );
	int dpix = metrics.logicalDpiX();
	int dpiy = metrics.logicalDpiY();
	const int margin = 72; // pt
	QRect body( margin * dpix / 72, margin * dpiy / 72,
		    metrics.width() - margin * dpix / 72 * 2,
		    metrics.height() - margin * dpiy / 72 * 2 );
	QFont font( "times", 10 );
	QSimpleRichText richText( currentEditor()->text(), font, currentEditor()->context(), currentEditor()->styleSheet(),
				  currentEditor()->mimeSourceFactory(), body.height() );
	richText.setWidth( &p, body.width() );
	QRect view( body );
	int page = 1;
	do {
	    richText.draw( &p, body.left(), body.top(), view, colorGroup() );
	    view.moveBy( 0, body.height() );
	    p.translate( 0 , -body.height() );
	    p.setFont( font );
	    p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
			view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
	    if ( view.top()  >= richText.height() )
		break;
	    printer.newPage();
	    page++;
	} while (TRUE);
    }
#endif
}

void MainWindow::on_pushButton_clicked()
{
    int current_tab = this->ui->tabWidget->currentIndex();

    QPrinter printer;
    QTableView *myWidget;

    switch(current_tab)
    {
    case TABLE::StudentsTableTab:
        myWidget = this->ui->StudentsTableView;
        break;

    case TABLE::TeachersTableTab:
        myWidget = this->ui->TeachersTableView;
        break;
    default:
        return;
    }

    QPixmap pix = myWidget->grab();
    QPainter painter;
    printer.setResolution(QPrinter::HighResolution);

    printer.setPageMargins (15,15,15,15,QPrinter::Millimeter);
    painter.begin(&printer);
    double xscale = printer.pageRect().width()/double(myWidget->width() + 50);
    double yscale = printer.pageRect().height()/double(myWidget->height() + 50);
    double scale = qMin(xscale, yscale);
    painter.scale(scale, scale);

    painter.drawPixmap(0, 0, pix);
    painter.end();

    myWidget->render(&painter);

}