C++ QDesktopWidget::physicalDpiX方法代码示例

PDFRenderer* PDFRenderer::rendererForUuid(const QUuid &uuid, const QString &filename, bool importingFile)
{
    if (sRenderers.contains(uuid))
    {
        return sRenderers.value(uuid);
    }
    else
    {
        PDFRenderer *newRenderer = new XPDFRenderer(filename,importingFile);

        newRenderer->setRefCount(0);
        newRenderer->setFileUuid(uuid);

        QFile file(filename);
        file.open(QIODevice::ReadOnly);
        newRenderer->setFileData(file.readAll());
        file.close();

        sRenderers.insert(newRenderer->fileUuid(), newRenderer);

        QDesktopWidget* desktop = UBApplication::desktop();
        int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
        newRenderer->setDPI(dpiCommon);

        return newRenderer;
    }
}

UBExportFullPDF::UBExportFullPDF(QObject *parent)
    : UBExportAdaptor(parent)
{
    //need to calculate screen resolution
	QDesktopWidget* desktop = UBApplication::desktop();
	int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
	mScaleFactor = 72.0f / dpiCommon;
}

UBAbstractDrawRuler::UBAbstractDrawRuler()
	: mShowButtons(false)
    , mAntiScaleRatio(1.0)
{
	//we actually need to evaluate pixels per millimeter
	QDesktopWidget* desktop = UBApplication::desktop();
	int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
    sPixelsPerMillimeter = qRound(dpiCommon / UBGeometryUtils::inchSize);

}

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;
}

void PrintLayout::setup()
{
	QDesktopWidget *desktop = QApplication::desktop();
	screenDpiX = desktop->physicalDpiX();
	screenDpiY = desktop->physicalDpiY();

	printerDpi = printer->resolution();
	pageRect = printer->pageRect();

	scaleX = (qreal)printerDpi/(qreal)screenDpiX;
	scaleY = (qreal)printerDpi/(qreal)screenDpiY;
}

void PrintLayout::setup()
{
	QDesktopWidget *desktop = QApplication::desktop();
	screenDpiX = desktop->physicalDpiX();
	screenDpiY = desktop->physicalDpiY();

	printerDpi = printer->resolution();
	pageRect = printer->pageRect();

	// a printer page in pixels
	pageW = pageRect.width();
	pageH = pageRect.height();
}

void PrintLayout::setup()
{
	QDesktopWidget *desktop = QApplication::desktop();
	screenDpiX = desktop->physicalDpiX();
	screenDpiY = desktop->physicalDpiY();

	printerDpi = printer->resolution();
	pageRect = printer->pageRect();

	scaleX = (qreal)printerDpi/(qreal)screenDpiX;
	scaleY = (qreal)printerDpi/(qreal)screenDpiY;

	// a printer page scalled to screen DPI
	scaledPageW = pageRect.width() / scaleX;
	scaledPageH = pageRect.height() / scaleY;
}

UBGraphicsCompass::UBGraphicsCompass()
    : QGraphicsRectItem()
    , mResizing(false)
    , mRotating(false)
    , mDrawing(false)
    , mShowButtons(false)
    , mSpanAngleInDegrees(0)
    , mDrewCircle(false)
    , mCloseSvgItem(0)
    , mResizeSvgItem(0)
    , mAntiScaleRatio(1.0)
    , mDrewCenterCross(false)
{
    setRect(sDefaultRect);
    //TODO claudio: remove code duplication
    QDesktopWidget* desktop = UBApplication::desktop();
    int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
    mPixelsPerMillimeter = qRound(dpiCommon / 25.4f);

    setFlag(QGraphicsItem::ItemIsMovable, true);
    setFlag(QGraphicsItem::ItemIsSelectable, true);
    setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);

    setAcceptsHoverEvents(true);

    mCloseSvgItem = new QGraphicsSvgItem(":/images/closeTool.svg", this);
    mCloseSvgItem->setVisible(false);
    mCloseSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));

    mResizeSvgItem = new QGraphicsSvgItem(":/images/resizeCompass.svg", this);
    mResizeSvgItem->setVisible(false);
    mResizeSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));

    updateResizeCursor();
    updateDrawCursor();

    unsetCursor();

    setData(UBGraphicsItemData::itemLayerType, QVariant(itemLayerType::CppTool)); //Necessary to set if we want z value to be assigned correctly
    setFlag(QGraphicsItem::ItemIsSelectable, false);

    connect(UBApplication::boardController, SIGNAL(penColorChanged()), this, SLOT(penColorChanged()));
    connect(UBDrawingController::drawingController(), SIGNAL(lineWidthIndexChanged(int)), this, SLOT(lineWidthChanged()));
}

UBImportPDF::UBImportPDF(QObject *parent)
    : UBPageBasedImportAdaptor(parent)
{
    QDesktopWidget* desktop = UBApplication::desktop();
	this->dpi = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
}

double get_screen_dpi()
{
	QDesktopWidget *mydesk = qApp->desktop();
	return mydesk->physicalDpiX();
}

double get_screen_dpi()
{
    QDesktopWidget *mydesk = application->desktop();
    return mydesk->physicalDpiX();
}