void SceneObject::paint(QPainter &painter, const KoViewConverter &converter,
KoShapePaintingContext &context)
{
Q_UNUSED(context);
//painter.setPen(QPen(QColor(172, 196, 206)));
painter.setPen(QPen(QColor(0, 0, 0)));
#if 1
painter.drawRect(converter.documentToView(QRectF(QPoint(0, 0), size())));
#else
QRectF rect = converter.documentToView(boundingRect());
QRectF rect = converter.documentToView(QRectF(QPoint(0, 0), size()));
painter.drawRect(rect);
#endif
kDebug(31000) << "boundingRect: " << boundingRect();
kDebug(31000) << "outlineRect: " << outlineRect();
#if 0 // Taken from the vector shape
QRectF rect(QPointF(0,0), m_size);
painter.save();
// Draw a simple cross in a rectangle just to indicate that there is something here.
painter.setPen(QPen(QColor(172, 196, 206)));
painter.drawRect(rect);
painter.drawLine(rect.topLeft(), rect.bottomRight());
painter.drawLine(rect.bottomLeft(), rect.topRight());
painter.restore();
#endif
}
void PictureShape::waitUntilReady(const KoViewConverter &converter, bool asynchronous) const
{
KoImageData *imageData = qobject_cast<KoImageData*>(userData());
if (imageData == 0) {
return;
}
if (asynchronous) {
// get pixmap and schedule it if not
QSize pixels = converter.documentToView(QRectF(QPointF(0,0), size())).size().toSize();
QImage image = imageData->image();
if (image.isNull()) {
return;
}
m_printQualityRequestedSize = pixels;
if (image.size().width() < pixels.width()) { // don't scale up.
pixels = image.size();
}
m_printQualityImage = image.scaled(pixels, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
else {
QSize pixmapSize = calcOptimalPixmapSize(converter.documentToView(QRectF(QPointF(0,0), size())).size(), imageData->image().size());
QString key(generate_key(imageData->key(), pixmapSize));
if (QPixmapCache::find(key) == 0) {
QPixmap pixmap = imageData->pixmap(pixmapSize);
QPixmapCache::insert(key, pixmap);
}
}
}
void KarbonCalligraphyTool::paint(QPainter &painter, const KoViewConverter &converter)
{
if (m_selectedPath) {
painter.save();
painter.setRenderHints(QPainter::Antialiasing, false);
painter.setPen(Qt::red); // TODO make configurable
QRectF rect = m_selectedPath->boundingRect();
QPointF p1 = converter.documentToView(rect.topLeft());
QPointF p2 = converter.documentToView(rect.bottomRight());
painter.drawRect(QRectF(p1, p2));
painter.restore();
}
if (!m_shape) {
return;
}
painter.save();
painter.setTransform(m_shape->absoluteTransformation(&converter) *
painter.transform());
KoShapePaintingContext paintContext; //FIXME
m_shape->paint(painter, converter, paintContext);
painter.restore();
}
void KisDuplicateOpSettings::paintOutline(const QPointF& pos, KisImageSP image, QPainter &painter, const KoViewConverter &converter) const
{
KisBrushSP brush = m_optionsWidget->m_brushOption->brush();
QPointF hotSpot = brush->hotSpot(1.0, 1.0);
painter.setPen(Qt::black);
painter.setBackground(Qt::black);
painter.drawEllipse( converter.documentToView( image->pixelToDocument(QRect(0,0, brush->width(), brush->height()) ).translated( pos - hotSpot + QPoint(1,1) ) ) );
QRectF rect2 = converter.documentToView( duplicateOutlineRect( pos, image ) );
painter.drawLine(rect2.topLeft(), rect2.bottomRight() );
painter.drawLine(rect2.topRight(), rect2.bottomLeft() );
}
void TestSnapStrategy::testBoundingBoxDecoration()
{
//tests the decoration by making sure the returned path has the pre-calculated end point
BoundingBoxSnapStrategy toTest;
KoViewConverter viewConverter;
QSizeF unzoomedSize = viewConverter.viewToDocument(QSizeF(5, 5));
QPointF snappedPos(0,0);
QPointF originalEndPoint(snappedPos + QPointF(unzoomedSize.width(), -unzoomedSize.height()));
QPainterPath resultingDecoration = toTest.decoration(viewConverter);
QVERIFY( resultingDecoration.currentPosition() == originalEndPoint );
}
void KoPatternBackground::paint(QPainter &painter, const KoViewConverter &converter, KoShapePaintingContext &/*context*/, const QPainterPath &fillPath) const
{
Q_D(const KoPatternBackground);
if (! d->imageData)
return;
painter.save();
if (d->repeat == Tiled) {
// calculate scaling of pixmap
QSizeF targetSize = d->targetSize();
QSizeF imageSize = d->imageData->imageSize();
qreal scaleX = targetSize.width() / imageSize.width();
qreal scaleY = targetSize.height() / imageSize.height();
QRectF targetRect = fillPath.boundingRect();
// undo scaling on target rectangle
targetRect.setWidth(targetRect.width() / scaleX);
targetRect.setHeight(targetRect.height() / scaleY);
// determine pattern offset
QPointF offset = d->offsetFromRect(targetRect, imageSize);
// create matrix for pixmap scaling
QTransform matrix;
matrix.scale(scaleX, scaleY);
painter.setClipPath(fillPath);
painter.setWorldTransform(matrix, true);
painter.drawTiledPixmap(targetRect, d->imageData->pixmap(imageSize.toSize()), -offset);
} else if (d->repeat == Original) {
QRectF sourceRect(QPointF(0, 0), d->imageData->imageSize());
QRectF targetRect(QPoint(0, 0), d->targetSize());
targetRect.moveCenter(fillPath.boundingRect().center());
painter.setClipPath(fillPath);
painter.drawPixmap(targetRect, d->imageData->pixmap(sourceRect.size().toSize()), sourceRect);
} else if (d->repeat == Stretched) {
painter.setClipPath(fillPath);
// undo conversion of the scaling so that we can use a nicely scaled image of the correct size
qreal zoomX, zoomY;
converter.zoom(&zoomX, &zoomY);
zoomX = zoomX ? 1 / zoomX : zoomX;
zoomY = zoomY ? 1 / zoomY : zoomY;
painter.scale(zoomX, zoomY);
QRectF targetRect = converter.documentToView(fillPath.boundingRect());
painter.drawPixmap(targetRect.topLeft(), d->imageData->pixmap(targetRect.size().toSize()));
}
painter.restore();
}
void KoShapeShadow::paint(KoShape *shape, QPainter &painter, const KoViewConverter &converter)
{
if (! d->visible)
return;
// So the approach we are taking here is to draw into a buffer image the size of boundingRect
// We offset by the shadow offset at the time we draw into the buffer
// Then we filter the image and draw it at the position of the bounding rect on canvas
//the boundingRect of the shape or the KoSelection boundingRect of the group
QRectF shadowRect = shape->boundingRect();
QRectF zoomedClipRegion = converter.documentToView(shadowRect);
// Init the buffer image
QImage sourceGraphic(zoomedClipRegion.size().toSize(), QImage::Format_ARGB32_Premultiplied);
sourceGraphic.fill(qRgba(0,0,0,0));
// Init the buffer painter
QPainter imagePainter(&sourceGraphic);
imagePainter.setPen(Qt::NoPen);
imagePainter.setBrush(Qt::NoBrush);
imagePainter.setRenderHint(QPainter::Antialiasing, painter.testRenderHint(QPainter::Antialiasing));
// Since our imagebuffer and the canvas don't align we need to offset our drawings
imagePainter.translate(-1.0f*converter.documentToView(shadowRect.topLeft()));
// Handle the shadow offset
imagePainter.translate(converter.documentToView(offset()));
KoShapeGroup *group = dynamic_cast<KoShapeGroup*>(shape);
if (group) {
d->paintGroupShadow(group, imagePainter, converter);
} else {
//apply shape's transformation
imagePainter.setTransform(shape->absoluteTransformation(&converter), true);
d->paintShadow(shape, imagePainter, converter);
}
imagePainter.end();
// Blur the shadow (well the entire buffer)
d->blurShadow(sourceGraphic, converter.documentToViewX(d->blur), d->color);
// Paint the result
painter.save();
// The painter is initialized for us with canvas transform 'plus' shape transform
// we are only interested in the canvas transform so 'subtract' the shape transform part
painter.setTransform(shape->absoluteTransformation(&converter).inverted() * painter.transform());
painter.drawImage(zoomedClipRegion.topLeft(), sourceGraphic);
painter.restore();
}
void VideoShape::paint(QPainter &painter, const KoViewConverter &converter, KoShapePaintingContext &)
{
QRectF pixelsF = converter.documentToView(QRectF(QPointF(0,0), size()));
VideoData *currentVideoData = videoData();
#ifdef SHOULD_BUILD_THUMBNAIL
if (currentVideoData && currentVideoData != m_oldVideoData) {
//generate thumbnails
m_oldVideoData = currentVideoData;
m_thumbnailer->createThumbnail(currentVideoData, pixelsF.size().toSize());
}
QImage thumnailImage = m_thumbnailer->thumbnail();
if (thumnailImage.isNull()) {
painter.fillRect(pixelsF, QColor(Qt::gray));
painter.setPen(QPen());
painter.drawRect(pixelsF);
m_icon.paint(&painter, pixelsF.toRect());
} else {
painter.drawImage(pixelsF, thumnailImage);
}
#else
painter.fillRect(pixelsF, QColor(Qt::gray));
painter.setPen(QPen());
painter.drawRect(pixelsF);
m_icon.paint(&painter, pixelsF.toRect());
#endif
}
void KoCreateShapeStrategy::paint(QPainter &painter, const KoViewConverter &converter)
{
if (m_outline.isEmpty())
KoShapeRubberSelectStrategy::paint(painter, converter);
else {
painter.save();
painter.setRenderHint(QPainter::Antialiasing, false);
QColor selectColor(Qt::blue); // TODO make configurable
selectColor.setAlphaF(0.5);
QBrush sb(selectColor, Qt::SolidPattern);
painter.setPen(QPen(sb, 0));
painter.setBrush(sb);
QRectF paintRect = converter.documentToView(selectRect());
qreal xscale = paintRect.width() / m_outlineBoundingRect.width();
qreal yscale = paintRect.height() / m_outlineBoundingRect.height();
QMatrix matrix;
matrix.translate(-m_outlineBoundingRect.left(), -m_outlineBoundingRect.top());
matrix.scale(xscale, yscale);
painter.translate(paintRect.left(), paintRect.top());
if (painter.hasClipping())
paintRect = paintRect.intersect(painter.clipRegion().boundingRect());
painter.setMatrix(matrix, true);
painter.drawPath(m_outline);
painter.restore();
}
}
void KWCopyShape::paint(QPainter &painter, const KoViewConverter &converter)
{
painter.setClipRect(QRectF(QPointF(0, 0), converter.documentToView(size()))
.adjusted(-2, -2, 2, 2), // adjust for anti aliassing.
Qt::IntersectClip);
painter.save();
m_original->paint(painter, converter);
painter.restore();
if (m_original->border())
m_original->border()->paintBorder(m_original, painter, converter);
}
void KWOutlineShape::paintDecorations(QPainter &painter, const KoViewConverter &converter, const KoCanvasBase *canvas)
{
if (! canvas->shapeManager()->selection()->isSelected(this))
return;
applyConversion(painter, converter);
QPen pen = QPen(canvas->resourceProvider()->koColorResource(KWord::FrameOutlineColor).toQColor());
QPointF onePixel = converter.viewToDocument(QPointF(1, 1));
pen.setWidthF(onePixel.x());
painter.strokePath(outline(), pen);
}
void TestSnapStrategy::testLineGuideDecoration()
{
//tests the decoration by making sure there are horizontal and vertical lines in the guidesData
LineGuideSnapStrategy toTest;
const QPointF paramMousePosTwo;
MockShapeController fakeShapeControllerBaseTwo;
MockCanvas fakeKoCanvasBaseTwo(&fakeShapeControllerBaseTwo);
KoGuidesData guidesData;
//firstSnapPointList.push_back(
QList<qreal> horzLines;
horzLines.push_back(2);
horzLines.push_back(3);
horzLines.push_back(4);
horzLines.push_back(5);
QList<qreal> vertLines;
vertLines.push_back(1);
vertLines.push_back(2);
vertLines.push_back(3);
vertLines.push_back(4);
guidesData.setHorizontalGuideLines(horzLines);
guidesData.setVerticalGuideLines(vertLines);
fakeKoCanvasBaseTwo.setGuidesData(&guidesData);
qreal paramSnapDistanceTwo = 8;
KoSnapGuide aKoSnapGuideTwo(&fakeKoCanvasBaseTwo);
KoSnapProxy paramProxyTwo(&aKoSnapGuideTwo);
toTest.snap(paramMousePosTwo, ¶mProxyTwo, paramSnapDistanceTwo);
KoViewConverter parameterConverter;
QSizeF unzoomedSize = parameterConverter.viewToDocument(QSizeF(5, 5));
QPointF snappedPos(1,2);
QPointF originalEndPointOne(snappedPos + QPointF(unzoomedSize.width(), 0));
QPointF originalEndPointTwo(snappedPos + QPointF(0, unzoomedSize.height()));
QPainterPath resultingDecoration = toTest.decoration(parameterConverter);
QVERIFY( (resultingDecoration.currentPosition() == originalEndPointOne) || (resultingDecoration.currentPosition() == originalEndPointTwo ) );
}
bool KarbonPatternEditStrategyBase::mouseInsideHandle( const QPointF &mousePos, const QPointF &handlePos, const KoViewConverter &converter ) const
{
qreal grabSensitivityInPt = converter.viewToDocumentX(m_grabSensitivity);
if( mousePos.x() < handlePos.x()-grabSensitivityInPt )
return false;
if( mousePos.x() > handlePos.x()+grabSensitivityInPt )
return false;
if( mousePos.y() < handlePos.y()-grabSensitivityInPt )
return false;
if( mousePos.y() > handlePos.y()+grabSensitivityInPt )
return false;
return true;
}
void TestSnapStrategy::testGridDecoration()
{
//Tests the decoration by making sure the path returned has the calculated endpoint
GridSnapStrategy toTest;
const QPointF paramMousePosTwo(40,60);
MockShapeController fakeShapeControllerBaseTwo;
MockCanvas fakeKoCanvasBaseTwo(&fakeShapeControllerBaseTwo);
fakeKoCanvasBaseTwo.setHorz(10);
fakeKoCanvasBaseTwo.setVert(8);
KoSnapGuide aKoSnapGuideTwo(&fakeKoCanvasBaseTwo);
KoSnapProxy paramProxyTwo(&aKoSnapGuideTwo);
qreal paramSnapDistanceTwo = 8;
toTest.snap(paramMousePosTwo, ¶mProxyTwo, paramSnapDistanceTwo);
KoViewConverter viewConverter;
QSizeF unzoomedSize = viewConverter.viewToDocument(QSizeF(5, 5));
QPointF snappedPos(40, 56); //the snapped position is 40, 56 because horz 10 - so 40 is right on the gridline, and 56 because 7*8 = 56 which is within 8 of 60
QPointF originalEndPoint(snappedPos + QPointF(0, unzoomedSize.height()));
QPainterPath resultingDecoration = toTest.decoration(viewConverter);
QVERIFY( resultingDecoration.currentPosition() == originalEndPoint );
}
void Legend::paintPixmap(QPainter &painter, const KoViewConverter &converter)
{
// Adjust the size of the painting area to the current zoom level
const QSize paintRectSize = converter.documentToView(d->lastSize).toSize();
d->image = QImage(paintRectSize, QImage::Format_ARGB32);
QPainter pixmapPainter(&d->image);
pixmapPainter.setRenderHints(painter.renderHints());
pixmapPainter.setRenderHint(QPainter::Antialiasing, false);
// Scale the painter's coordinate system to fit the current zoom level.
applyConversion(pixmapPainter, converter);
d->kdLegend->paint(&pixmapPainter);
}
void Legend::paint(QPainter &painter, const KoViewConverter &converter, KoShapePaintingContext &paintContext)
{
//painter.save();
// First of all, scale the painter's coordinate system to fit the current zoom level
applyConversion(painter, converter);
// Calculate the clipping rect
QRectF paintRect = QRectF(QPointF(0, 0), size());
//clipRect.intersect(paintRect);
painter.setClipRect(paintRect, Qt::IntersectClip);
// Get the current zoom level
QPointF zoomLevel;
converter.zoom(&zoomLevel.rx(), &zoomLevel.ry());
// Only repaint the pixmap if it is scheduled, the zoom level changed or the shape was resized
/*if ( d->pixmapRepaintRequested
|| d->lastZoomLevel != zoomLevel
|| d->lastSize != size()) {
// TODO: What if two zoom levels are constantly being requested?
// At the moment, this *is* the case, due to the fact
// that the shape is also rendered in the page overview
// in Stage
// Every time the window is hidden and shown again, a repaint is
// requested --> laggy performance, especially when quickly
// switching through windows
d->pixmapRepaintRequested = false;
d->lastZoomLevel = zoomLevel;
d->lastSize = size();
paintPixmap(painter, converter);
}*/
// Paint the background
if (background()) {
QPainterPath p;
p.addRect(paintRect);
background()->paint(painter, converter, paintContext, p);
}
// KChart thinks in pixels, Calligra in pt
ScreenConversions::scaleFromPtToPx(painter);
d->kdLegend->paint(&painter);
//painter.restore();
// Paint the cached pixmap
//painter.drawImage(0, 0, d->image);
}
void PictureShape::paint( QPainter& painter, const KoViewConverter& converter ) {
QRectF target = converter.documentToView(QRectF(QPointF(0,0), size()));
if (m_imageData != userData()) {
m_imageData = dynamic_cast<KoImageData*> (userData());
}
if (m_imageData == 0) {
painter.fillRect(target, QColor(Qt::gray));
}
else {
QPixmap pm = m_imageData->pixmap();
// TODO only paint the rect that is visible
painter.drawPixmap(target.toRect(), pm, QRect(0, 0, pm.width(), pm.height()));
}
}
void KisToolPan::paint(QPainter& gc, const KoViewConverter &converter)
{
Q_UNUSED(converter);
if(m_rotationMode) {
const KisCoordinatesConverter *converter = kritaCanvas()->coordinatesConverter();
QPointF centerPoint = converter->flakeCenterPoint();
QBrush fillBrush(QColor(0,0,0,100));
QPen checkerPen(QColor(255,255,255,100), 5., Qt::SolidLine, Qt::RoundCap);
gc.save();
gc.setPen(Qt::NoPen);
gc.setBrush(fillBrush);
gc.drawEllipse(centerPoint, m_checkerRadius, m_checkerRadius);
gc.setPen(checkerPen);
gc.drawLine(centerPoint, centerPoint + QPointF(0, -m_checkerRadius));
gc.restore();
}
}
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
}
void KarbonPatternEditStrategyBase::paintHandle( QPainter &painter, const KoViewConverter &converter, const QPointF &position ) const
{
QRectF handleRect = converter.viewToDocument( QRectF( 0, 0, 2*m_handleRadius, 2*m_handleRadius ) );
handleRect.moveCenter( position );
painter.drawRect( handleRect );
}
void PictureShape::paint(QPainter &painter, const KoViewConverter &converter,
KoShapePaintingContext &paintContext)
{
Q_UNUSED(paintContext);
QRectF viewRect = converter.documentToView(QRectF(QPointF(0,0), size()));
if (imageData() == 0) {
painter.fillRect(viewRect, QColor(Qt::gray));
return;
}
painter.save();
applyConversion(painter, converter);
paintBorder(painter, converter);
painter.restore();
QSize pixmapSize = calcOptimalPixmapSize(viewRect.size(), imageData()->image().size());
// Normalize the clipping rect if it isn't already done.
m_clippingRect.normalize(imageData()->imageSize());
// Handle style:mirror, i.e. mirroring horizontally and/or vertically.
//
// NOTE: At this time we don't handle HorizontalOnEven
// and HorizontalOnOdd, which have to know which
// page they are on. In those cases we treat it as
// no horizontal mirroring at all.
bool doFlip = false;
QSizeF shapeSize = size();
QSizeF viewSize = converter.documentToView(shapeSize);
qreal midpointX = 0.0;
qreal midpointY = 0.0;
qreal scaleX = 1.0;
qreal scaleY = 1.0;
if (m_mirrorMode & MirrorHorizontal) {
midpointX = viewSize.width() / qreal(2.0);
scaleX = -1.0;
doFlip = true;
}
if (m_mirrorMode & MirrorVertical) {
midpointY = viewSize.height() / qreal(2.0);
scaleY = -1.0;
doFlip = true;
}
if (doFlip) {
QTransform outputTransform = painter.transform();
QTransform worldTransform = QTransform();
//kDebug(31000) << "Flipping" << midpointX << midpointY << scaleX << scaleY;
worldTransform.translate(midpointX, midpointY);
worldTransform.scale(scaleX, scaleY);
worldTransform.translate(-midpointX, -midpointY);
//kDebug(31000) << "After flipping for window" << worldTransform;
QTransform newTransform = worldTransform * outputTransform;
painter.setWorldTransform(newTransform);
}
// Paint the image as prepared in waitUntilReady()
if (!m_printQualityImage.isNull() && pixmapSize != m_printQualityRequestedSize) {
QSizeF imageSize = m_printQualityImage.size();
QRectF cropRect(
imageSize.width() * m_clippingRect.left,
imageSize.height() * m_clippingRect.top,
imageSize.width() * m_clippingRect.width(),
imageSize.height() * m_clippingRect.height()
);
painter.drawImage(viewRect, m_printQualityImage, cropRect);
m_printQualityImage = QImage(); // free memory
}
else {
QPixmap pixmap;
QString key(generate_key(imageData()->key(), pixmapSize));
// If the required pixmap is not in the cache
// launch a task in a background thread that scales
// the source image to the required size
if (!QPixmapCache::find(key, &pixmap)) {
QThreadPool::globalInstance()->start(new _Private::PixmapScaler(this, pixmapSize));
painter.fillRect(viewRect, QColor(Qt::gray)); // just paint a gray rect as long as we don't have the required pixmap
}
else {
QRectF cropRect(
pixmapSize.width() * m_clippingRect.left,
pixmapSize.height() * m_clippingRect.top,
pixmapSize.width() * m_clippingRect.width(),
pixmapSize.height() * m_clippingRect.height()
);
painter.drawPixmap(viewRect, pixmap, cropRect);
}
}
}