void QgsTransformEffect::draw( QgsRenderContext &context )
{
if ( !source() || !enabled() || !context.painter() )
return;
QPainter* painter = context.painter();
//apply transformations
painter->save();
QTransform t = createTransform( context );
painter->setTransform( t, true );
drawSource( *painter );
painter->restore();
}
void QgsAnnotation::drawFrame( QgsRenderContext &context ) const
{
if ( !mFillSymbol )
return;
context.painter()->setRenderHint( QPainter::Antialiasing, context.flags() & QgsRenderContext::Antialiasing );
QPolygonF poly;
QList<QPolygonF> rings; //empty list
for ( int i = 0; i < 4; ++i )
{
QLineF currentSegment = segment( i );
poly << currentSegment.p1();
if ( i == mBalloonSegment && mHasFixedMapPosition )
{
poly << mBalloonSegmentPoint1;
poly << QPointF( 0, 0 );
poly << mBalloonSegmentPoint2;
}
poly << currentSegment.p2();
}
if ( poly.at( 0 ) != poly.at( poly.count() - 1 ) )
poly << poly.at( 0 );
mFillSymbol->startRender( context );
mFillSymbol->renderPolygon( poly, &rings, nullptr, context );
mFillSymbol->stopRender( context );
}
void QgsEffectStackPropertiesWidget::updatePreview()
{
QPainter painter;
QImage previewImage( 150, 150, QImage::Format_ARGB32 );
previewImage.fill( Qt::transparent );
painter.begin( &previewImage );
painter.setRenderHint( QPainter::Antialiasing );
QgsRenderContext context = QgsSymbolLayerUtils::createRenderContext( &painter );
if ( !mPreviewPicture )
{
QPicture previewPic;
QPainter previewPicPainter;
previewPicPainter.begin( &previewPic );
previewPicPainter.setPen( Qt::red );
previewPicPainter.setBrush( QColor( 255, 100, 100, 255 ) );
previewPicPainter.drawEllipse( QPoint( 75, 75 ), 30, 30 );
previewPicPainter.end();
mStack->render( previewPic, context );
}
else
{
context.painter()->translate( 35, 35 );
mStack->render( *mPreviewPicture, context );
}
painter.end();
lblPreview->setPixmap( QPixmap::fromImage( previewImage ) );
emit widgetChanged();
}
void QgsAnnotation::render( QgsRenderContext &context ) const
{
QPainter *painter = context.painter();
if ( !painter )
{
return;
}
painter->save();
drawFrame( context );
if ( mHasFixedMapPosition )
{
drawMarkerSymbol( context );
}
if ( mHasFixedMapPosition )
{
painter->translate( mOffsetFromReferencePoint.x() + context.convertToPainterUnits( mContentsMargins.left(), QgsUnitTypes::RenderMillimeters ),
mOffsetFromReferencePoint.y() + context.convertToPainterUnits( mContentsMargins.top(), QgsUnitTypes::RenderMillimeters ) );
}
else
{
painter->translate( context.convertToPainterUnits( mContentsMargins.left(), QgsUnitTypes::RenderMillimeters ),
context.convertToPainterUnits( mContentsMargins.top(), QgsUnitTypes::RenderMillimeters ) );
}
QSizeF size( mFrameSize.width() - context.convertToPainterUnits( mContentsMargins.left() + mContentsMargins.right(), QgsUnitTypes::RenderMillimeters ),
mFrameSize.height() - context.convertToPainterUnits( mContentsMargins.top() + mContentsMargins.bottom(), QgsUnitTypes::RenderMillimeters ) );
renderAnnotation( context, size );
painter->restore();
}
void QgsPointDisplacementRenderer::drawGroup( QPointF centerPoint, QgsRenderContext &context, const ClusteredGroup &group )
{
//calculate max diagonal size from all symbols in group
double diagonal = 0;
for ( const GroupedFeature &feature : group )
{
if ( QgsMarkerSymbol *symbol = feature.symbol() )
{
diagonal = std::max( diagonal, M_SQRT2 * symbol->size( context ) );
}
}
QgsSymbolRenderContext symbolContext( context, QgsUnitTypes::RenderMillimeters, 1.0, false );
QList<QPointF> symbolPositions;
QList<QPointF> labelPositions;
double circleRadius = -1.0;
double gridRadius = -1.0;
int gridSize = -1;
calculateSymbolAndLabelPositions( symbolContext, centerPoint, group.size(), diagonal, symbolPositions, labelPositions, circleRadius, gridRadius, gridSize );
//only draw circle/grid if there's a pen present - otherwise skip drawing transparent grids
if ( mCircleColor.isValid() && mCircleColor.alpha() > 0 )
{
//draw circle
if ( circleRadius > 0 )
drawCircle( circleRadius, symbolContext, centerPoint, group.size() );
//draw grid
else
drawGrid( gridSize, symbolContext, symbolPositions, group.size() );
}
if ( group.size() > 1 )
{
//draw mid point
QgsFeature firstFeature = group.at( 0 ).feature;
if ( mCenterSymbol )
{
mCenterSymbol->renderPoint( centerPoint, &firstFeature, context, -1, false );
}
else
{
context.painter()->drawRect( QRectF( centerPoint.x() - symbolContext.outputLineWidth( 1 ), centerPoint.y() - symbolContext.outputLineWidth( 1 ), symbolContext.outputLineWidth( 2 ), symbolContext.outputLineWidth( 2 ) ) );
}
}
//draw symbols on the circle
drawSymbols( group, context, symbolPositions );
//and also the labels
if ( mLabelIndex >= 0 )
{
drawLabels( centerPoint, symbolContext, labelPositions, group );
}
}
void QgsBlurEffect::drawBlurredImage( QgsRenderContext &context, QImage &image )
{
//transparency
QgsImageOperation::multiplyOpacity( image, 1.0 - mTransparency );
QPainter *painter = context.painter();
painter->save();
painter->setCompositionMode( mBlendMode );
painter->drawImage( imageOffset( context ), image );
painter->restore();
}
void QgsAnnotation::drawMarkerSymbol( QgsRenderContext &context ) const
{
if ( !context.painter() )
{
return;
}
if ( mMarkerSymbol )
{
mMarkerSymbol->startRender( context );
mMarkerSymbol->renderPoint( QPointF( 0, 0 ), nullptr, context );
mMarkerSymbol->stopRender( context );
}
}
void QgsDrawSourceEffect::draw( QgsRenderContext &context )
{
if ( !enabled() || !context.painter() )
return;
QPainter *painter = context.painter();
if ( mBlendMode == QPainter::CompositionMode_SourceOver && qgsDoubleNear( mTransparency, 0.0 ) )
{
//just draw unmodified source
drawSource( *painter );
}
else
{
//rasterize source and apply modifications
QImage image = sourceAsImage( context )->copy();
QgsImageOperation::multiplyOpacity( image, 1.0 - mTransparency );
painter->save();
painter->setCompositionMode( mBlendMode );
painter->drawImage( imageOffset( context ), image );
painter->restore();
}
}
void QgsColorEffect::draw( QgsRenderContext &context )
{
if ( !source() || !enabled() || !context.painter() )
return;
QPainter* painter = context.painter();
//rasterise source and apply modifications
QImage image = sourceAsImage( context )->copy();
QgsImageOperation::adjustBrightnessContrast( image, mBrightness, mContrast / 100.0 + 1 );
if ( mGrayscaleMode != QgsImageOperation::GrayscaleOff )
{
QgsImageOperation::convertToGrayscale( image, static_cast< QgsImageOperation::GrayscaleMode >( mGrayscaleMode ) );
}
QgsImageOperation::adjustHueSaturation( image, mSaturation, mColorizeOn ? mColorizeColor : QColor(), mColorizeStrength / 100.0 );
QgsImageOperation::multiplyOpacity( image, 1.0 - mTransparency );
painter->save();
painter->setCompositionMode( mBlendMode );
painter->drawImage( imageOffset( context ), image );
painter->restore();
}
void QgsPaintEffect::begin( QgsRenderContext &context )
{
//temporarily replace painter and direct paint operations for context to a QPicture
mPrevPainter = context.painter();
delete mTempPicture;
mTempPicture = new QPicture();
delete mEffectPainter;
mEffectPainter = new QPainter();
mEffectPainter->begin( mTempPicture );
context.setPainter( mEffectPainter );
}
void QgsLayoutItemHtml::render( QgsRenderContext &context, const QRectF &renderExtent, const int,
const QStyleOptionGraphicsItem * )
{
if ( !mWebPage )
return;
QPainter *painter = context.painter();
painter->save();
// painter is scaled to dots, so scale back to layout units
painter->scale( context.scaleFactor() / mHtmlUnitsToLayoutUnits, context.scaleFactor() / mHtmlUnitsToLayoutUnits );
painter->translate( 0.0, -renderExtent.top() * mHtmlUnitsToLayoutUnits );
mWebPage->mainFrame()->render( painter, QRegion( renderExtent.left(), renderExtent.top() * mHtmlUnitsToLayoutUnits, renderExtent.width() * mHtmlUnitsToLayoutUnits, renderExtent.height() * mHtmlUnitsToLayoutUnits ) );
painter->restore();
}
void QgsBlurEffect::draw( QgsRenderContext &context )
{
if ( !source() || !enabled() || !context.painter() )
return;
switch ( mBlurMethod )
{
case StackBlur:
drawStackBlur( context );
break;
case GaussianBlur:
drawGaussianBlur( context );
break;
}
}
void QgsNumericScaleBarRenderer::draw( QgsRenderContext &context, const QgsScaleBarSettings &settings, const ScaleBarContext &scaleContext ) const
{
if ( !context.painter() )
{
return;
}
QPainter *painter = context.painter();
painter->save();
if ( context.flags() & QgsRenderContext::Antialiasing )
painter->setRenderHint( QPainter::Antialiasing, true );
double margin = context.convertToPainterUnits( settings.boxContentSpace(), QgsUnitTypes::RenderMillimeters );
//map scalebar alignment to Qt::AlignmentFlag type
QgsTextRenderer::HAlignment hAlign = QgsTextRenderer::AlignLeft;
switch ( settings.alignment() )
{
case QgsScaleBarSettings::AlignLeft:
hAlign = QgsTextRenderer::AlignLeft;
break;
case QgsScaleBarSettings::AlignMiddle:
hAlign = QgsTextRenderer::AlignCenter;
break;
case QgsScaleBarSettings::AlignRight:
hAlign = QgsTextRenderer::AlignRight;
break;
}
//text destination is item's rect, excluding the margin
QRectF painterRect( margin, margin, context.convertToPainterUnits( scaleContext.size.width(), QgsUnitTypes::RenderMillimeters ) - 2 * margin,
context.convertToPainterUnits( scaleContext.size.height(), QgsUnitTypes::RenderMillimeters ) - 2 * margin );
QgsTextRenderer::drawText( painterRect, 0, hAlign, QStringList() << scaleText( scaleContext.scale ), context, settings.textFormat() );
painter->restore();
}
void QgsPointDisplacementRenderer::drawGroup( QPointF centerPoint, QgsRenderContext& context, const ClusteredGroup& group )
{
//calculate max diagonal size from all symbols in group
double diagonal = 0;
Q_FOREACH ( const GroupedFeature& feature, group )
{
if ( QgsMarkerSymbol* symbol = feature.symbol )
{
diagonal = qMax( diagonal, context.convertToPainterUnits( M_SQRT2 * symbol->size(),
symbol->sizeUnit(), symbol->sizeMapUnitScale() ) );
}
}
QgsSymbolRenderContext symbolContext( context, QgsUnitTypes::RenderMillimeters, 1.0, false );
QList<QPointF> symbolPositions;
QList<QPointF> labelPositions;
double circleRadius = -1.0;
calculateSymbolAndLabelPositions( symbolContext, centerPoint, group.size(), diagonal, symbolPositions, labelPositions, circleRadius );
//draw circle
if ( circleRadius > 0 )
drawCircle( circleRadius, symbolContext, centerPoint, group.size() );
if ( group.size() > 1 )
{
//draw mid point
QgsFeature firstFeature = group.at( 0 ).feature;
if ( mCenterSymbol )
{
mCenterSymbol->renderPoint( centerPoint, &firstFeature, context, -1, false );
}
else
{
context.painter()->drawRect( QRectF( centerPoint.x() - symbolContext.outputLineWidth( 1 ), centerPoint.y() - symbolContext.outputLineWidth( 1 ), symbolContext.outputLineWidth( 2 ), symbolContext.outputLineWidth( 2 ) ) );
}
}
//draw symbols on the circle
drawSymbols( group, context, symbolPositions );
//and also the labels
if ( mLabelIndex >= 0 )
{
drawLabels( centerPoint, symbolContext, labelPositions, group );
}
}
void QgsHeatmapRenderer::startRender( QgsRenderContext& context, const QgsFields& fields )
{
Q_UNUSED( fields );
if ( !context.painter() )
{
return;
}
// find out classification attribute index from name
mWeightAttrNum = fields.fieldNameIndex( mWeightExpressionString );
if ( mWeightAttrNum == -1 )
{
mWeightExpression.reset( new QgsExpression( mWeightExpressionString ) );
mWeightExpression->prepare( fields );
}
initializeValues( context );
}
void QgsLayoutItemTriangleShape::draw( QgsRenderContext &context, const QStyleOptionGraphicsItem * )
{
QPainter *painter = context.painter();
painter->setPen( Qt::NoPen );
painter->setBrush( Qt::NoBrush );
double scale = context.convertToPainterUnits( 1, QgsUnitTypes::RenderMillimeters );
QPolygonF shapePolygon = QPolygonF() << QPointF( 0, rect().height() * scale )
<< QPointF( rect().width() * scale, rect().height() * scale )
<< QPointF( rect().width() / 2.0 * scale, 0 )
<< QPointF( 0, rect().height() * scale );
QList<QPolygonF> rings; //empty list
symbol()->startRender( context );
symbol()->renderPolygon( shapePolygon, &rings, nullptr, context );
symbol()->stopRender( context );
}
void QgsInvertedPolygonRenderer::startRender( QgsRenderContext& context, const QgsFields& fields )
{
if ( !mSubRenderer )
{
return;
}
mSubRenderer->startRender( context, fields );
mFeaturesCategoryMap.clear();
mFeatureDecorations.clear();
mFields = fields;
// We compute coordinates of the extent which will serve as exterior ring
// for the final polygon
// It must be computed in the destination CRS if reprojection is enabled.
const QgsMapToPixel& mtp( context.mapToPixel() );
// convert viewport to dest CRS
QRect e( context.painter()->viewport() );
// add some space to hide borders and tend to infinity
e.adjust( -e.width()*10, -e.height()*10, e.width()*10, e.height()*10 );
QgsPolyline exteriorRing;
exteriorRing << mtp.toMapCoordinates( e.topLeft() );
exteriorRing << mtp.toMapCoordinates( e.topRight() );
exteriorRing << mtp.toMapCoordinates( e.bottomRight() );
exteriorRing << mtp.toMapCoordinates( e.bottomLeft() );
exteriorRing << mtp.toMapCoordinates( e.topLeft() );
mTransform = context.coordinateTransform();
// If reprojection is enabled, we must reproject during renderFeature
// and act as if there is no reprojection
// If we don't do that, there is no need to have a simple rectangular extent
// that covers the whole screen
// (a rectangle in the destCRS cannot be expressed as valid coordinates in the sourceCRS in general)
if ( mTransform )
{
// disable projection
context.setCoordinateTransform( 0 );
}
mExtentPolygon.clear();
mExtentPolygon.append( exteriorRing );
}
void QgsFormAnnotation::renderAnnotation( QgsRenderContext &context, QSizeF size ) const
{
if ( !mDesignerWidget )
return;
// scale painter back to 96 dpi, so that forms look good even in layout prints
context.painter()->save();
const double scaleFactor = context.painter()->device()->logicalDpiX() / 96.0;
context.painter()->scale( scaleFactor, scaleFactor );
size /= scaleFactor;
mDesignerWidget->setFixedSize( size.toSize() );
context.painter()->setBrush( Qt::NoBrush );
context.painter()->setPen( Qt::NoPen );
mDesignerWidget->render( context.painter(), QPoint( 0, 0 ) );
context.painter()->restore();
}
void QgsHeatmapRenderer::renderImage( QgsRenderContext& context )
{
if ( !context.painter() || !mGradientRamp )
{
return;
}
QImage image( context.painter()->device()->width() / mRenderQuality,
context.painter()->device()->height() / mRenderQuality,
QImage::Format_ARGB32 );
image.fill( Qt::transparent );
double scaleMax = mExplicitMax > 0 ? mExplicitMax : mCalculatedMaxValue;
int idx = 0;
double pixVal = 0;
QColor pixColor;
for ( int heightIndex = 0; heightIndex < image.height(); ++heightIndex )
{
QRgb* scanLine = ( QRgb* )image.scanLine( heightIndex );
for ( int widthIndex = 0; widthIndex < image.width(); ++widthIndex )
{
//scale result to fit in the range [0, 1]
pixVal = mValues.at( idx ) > 0 ? qMin(( mValues.at( idx ) / scaleMax ), 1.0 ) : 0;
//convert value to color from ramp
pixColor = mGradientRamp->color( mInvertRamp ? 1 - pixVal : pixVal );
scanLine[widthIndex] = pixColor.rgba();
idx++;
}
}
if ( mRenderQuality > 1 )
{
QImage resized = image.scaled( context.painter()->device()->width(),
context.painter()->device()->height() );
context.painter()->drawImage( 0, 0, resized );
}
else
{
context.painter()->drawImage( 0, 0, image );
}
}
void QgsLineSymbolV2::renderPolyline( const QPolygonF& points, const QgsFeature* f, QgsRenderContext& context, int layer, bool selected )
{
//save old painter
QPainter* renderPainter = context.painter();
QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, selected, mRenderHints, f, 0, mapUnitScale() );
if ( layer != -1 )
{
if ( layer >= 0 && layer < mLayers.count() )
{
renderPolylineUsingLayer(( QgsLineSymbolLayerV2* ) mLayers[layer], points, symbolContext );
}
return;
}
for ( QgsSymbolLayerV2List::iterator it = mLayers.begin(); it != mLayers.end(); ++it )
{
renderPolylineUsingLayer(( QgsLineSymbolLayerV2* ) * it, points, symbolContext );
}
context.setPainter( renderPainter );
}
bool QgsInvertedPolygonRenderer::renderFeature( QgsFeature& feature, QgsRenderContext& context, int layer, bool selected, bool drawVertexMarker )
{
if ( !context.painter() )
{
return false;
}
// store this feature as a feature to render with decoration if needed
if ( selected || drawVertexMarker )
{
mFeatureDecorations.append( FeatureDecoration( feature, selected, drawVertexMarker, layer ) );
}
// Features are grouped by category of symbols (returned by symbol(s)ForFeature)
// This way, users can have multiple inverted polygon fills for a layer,
// for instance, with rule based renderer and different symbols
// that have transparency.
//
// In order to assign a unique category to a set of symbols
// during each rendering session (between startRender() and stopRender()),
// we build an unique id as a QByteArray that is the concatenation
// of each symbol's memory address.
// The only assumption made here is that symbol(s)ForFeature will
// always return the same address for the same symbol(s) shared amongst
// different features.
// This QByteArray can then be used as a key for a QMap where the list of
// features for this category is stored
QByteArray catId;
if ( capabilities() & MoreSymbolsPerFeature )
{
QgsSymbolV2List syms( mSubRenderer->symbolsForFeature( feature, context ) );
Q_FOREACH ( QgsSymbolV2* sym, syms )
{
// append the memory address
catId.append( reinterpret_cast<const char*>( &sym ), sizeof( sym ) );
}
bool QgsPointDisplacementRenderer::renderFeature( QgsFeature& feature, QgsRenderContext& context, int layer, bool selected, bool drawVertexMarker )
{
Q_UNUSED( drawVertexMarker );
//point position in screen coords
QgsGeometry* geom = feature.geometry();
QGis::WkbType geomType = geom->wkbType();
if ( geomType != QGis::WKBPoint && geomType != QGis::WKBPoint25D )
{
//can only render point type
return false;
}
QPointF pt;
_getPoint( pt, context, geom->asWkb() );
//get list of labels and symbols
QStringList labelAttributeList;
QList<QgsMarkerSymbolV2*> symbolList;
if ( mDisplacementIds.contains( feature.id() ) )
{
//create the symbol for the whole display group if the id is the first entry in a display group
QList<QMap<QgsFeatureId, QgsFeature> >::iterator it = mDisplacementGroups.begin();
for ( ; it != mDisplacementGroups.end(); ++it )
{
//create the symbol for the whole display group if the id is the first entry in a display group
if ( feature.id() == it->begin().key() )
{
QMap<QgsFeatureId, QgsFeature>::iterator attIt = it->begin();
for ( ; attIt != it->end(); ++attIt )
{
if ( mDrawLabels )
{
labelAttributeList << getLabel( attIt.value() );
}
else
{
labelAttributeList << QString();
}
symbolList << dynamic_cast<QgsMarkerSymbolV2*>( firstSymbolForFeature( mRenderer, attIt.value() ) );
}
}
}
}
else //only one feature
{
symbolList << dynamic_cast<QgsMarkerSymbolV2*>( firstSymbolForFeature( mRenderer, feature ) );
if ( mDrawLabels )
{
labelAttributeList << getLabel( feature );
}
else
{
labelAttributeList << QString();
}
}
if ( symbolList.isEmpty() && labelAttributeList.isEmpty() )
{
return true; //display all point symbols for one posi
}
//draw symbol
double diagonal = 0;
double currentWidthFactor; //scale symbol size to map unit and output resolution
QList<QgsMarkerSymbolV2*>::const_iterator it = symbolList.constBegin();
for ( ; it != symbolList.constEnd(); ++it )
{
if ( *it )
{
currentWidthFactor = QgsSymbolLayerV2Utils::lineWidthScaleFactor( context, ( *it )->outputUnit() );
double currentDiagonal = sqrt( 2 * (( *it )->size() * ( *it )->size() ) ) * currentWidthFactor;
if ( currentDiagonal > diagonal )
{
diagonal = currentDiagonal;
}
}
}
QgsSymbolV2RenderContext symbolContext( context, QgsSymbolV2::MM, 1.0, selected );
double circleAdditionPainterUnits = symbolContext.outputLineWidth( mCircleRadiusAddition );
double radius = qMax(( diagonal / 2 ), labelAttributeList.size() * diagonal / 2 / M_PI ) + circleAdditionPainterUnits;
//draw Circle
drawCircle( radius, symbolContext, pt, symbolList.size() );
QList<QPointF> symbolPositions;
QList<QPointF> labelPositions;
calculateSymbolAndLabelPositions( pt, labelAttributeList.size(), radius, diagonal, symbolPositions, labelPositions );
//draw mid point
if ( labelAttributeList.size() > 1 )
{
if ( mCenterSymbol )
{
mCenterSymbol->renderPoint( pt, &feature, context, layer, selected );
}
else
{
context.painter()->drawRect( QRectF( pt.x() - symbolContext.outputLineWidth( 1 ), pt.y() - symbolContext.outputLineWidth( 1 ), symbolContext.outputLineWidth( 2 ), symbolContext.outputLineWidth( 2 ) ) );
}
}
//draw symbols on the circle
drawSymbols( feature, context, symbolList, symbolPositions, selected );
//and also the labels
drawLabels( pt, symbolContext, labelPositions, labelAttributeList );
return true;
}
void QgsPieDiagram::renderDiagram( const QgsAttributeMap& att, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )
{
QPainter* p = c.painter();
if ( !p )
{
return;
}
//get sum of values
QList<double> values;
double currentVal = 0;
double valSum = 0;
int valCount = 0;
QList<int>::const_iterator catIt = s.categoryIndices.constBegin();
for ( ; catIt != s.categoryIndices.constEnd(); ++catIt )
{
currentVal = att[*catIt].toDouble();
values.push_back( currentVal );
valSum += currentVal;
if ( currentVal ) valCount++;
}
//draw the slices
double totalAngle = 0;
double currentAngle;
//convert from mm / map units to painter units
QSizeF spu = sizePainterUnits( s.size, s, c );
double w = spu.width();
double h = spu.height();
double baseX = position.x();
double baseY = position.y() - h;
mPen.setColor( s.penColor );
setPenWidth( mPen, s, c );
p->setPen( mPen );
// there are some values > 0 available
if ( valSum > 0 )
{
QList<double>::const_iterator valIt = values.constBegin();
QList< QColor >::const_iterator colIt = s.categoryColors.constBegin();
for ( ; valIt != values.constEnd(); ++valIt, ++colIt )
{
currentAngle = *valIt / valSum * 360 * 16;
mCategoryBrush.setColor( *colIt );
p->setBrush( mCategoryBrush );
// if only 1 value is > 0, draw a circle
if ( valCount == 1 )
{
p->drawEllipse( baseX, baseY, w, h );
}
else
{
p->drawPie( baseX, baseY, w, h, totalAngle, currentAngle );
}
totalAngle += currentAngle;
}
}
else // valSum > 0
{
// draw empty circle if no values are defined at all
mCategoryBrush.setColor( Qt::transparent );
p->setBrush( mCategoryBrush );
p->drawEllipse( baseX, baseY, w, h );
}
}
void QgsDecorationNorthArrow::render( const QgsMapSettings &mapSettings, QgsRenderContext &context )
{
//Large IF statement controlled by enable checkbox
if ( enabled() )
{
QSize size( 64, 64 );
QSvgRenderer svg;
const QByteArray &svgContent = QgsApplication::svgCache()->svgContent( QStringLiteral( ":/images/north_arrows/default.svg" ), size.width(), mColor, mOutlineColor, 1.0, 1.0 );
svg.load( svgContent );
if ( svg.isValid() )
{
double centerXDouble = size.width() / 2.0;
double centerYDouble = size.width() / 2.0;
//save the current canvas rotation
context.painter()->save();
//
//work out how to shift the image so that it rotates
// properly about its center
//(x cos a + y sin a - x, -x sin a + y cos a - y)
//
// could move this call to somewhere else so that it is only
// called when the projection or map extent changes
if ( mAutomatic )
{
mRotationInt = QgsBearingUtils:: bearingTrueNorth( mapSettings.destinationCrs(), context.extent().center() );
mRotationInt += mapSettings.rotation();
}
double myRadiansDouble = mRotationInt * M_PI / 180.0;
int xShift = static_cast<int>( (
( centerXDouble * cos( myRadiansDouble ) ) +
( centerYDouble * sin( myRadiansDouble ) )
) - centerXDouble );
int yShift = static_cast<int>( (
( -centerXDouble * sin( myRadiansDouble ) ) +
( centerYDouble * cos( myRadiansDouble ) )
) - centerYDouble );
// need width/height of paint device
int myHeight = context.painter()->device()->height();
int myWidth = context.painter()->device()->width();
//QgsDebugMsg("Rendering north arrow at " + mPlacementLabels.at(mPlacementIndex));
// Set margin according to selected units
int myXOffset = 0;
int myYOffset = 0;
switch ( mMarginUnit )
{
case QgsUnitTypes::RenderMillimeters:
{
int myPixelsInchX = context.painter()->device()->logicalDpiX();
int myPixelsInchY = context.painter()->device()->logicalDpiY();
myXOffset = myPixelsInchX * INCHES_TO_MM * mMarginHorizontal;
myYOffset = myPixelsInchY * INCHES_TO_MM * mMarginVertical;
break;
}
case QgsUnitTypes::RenderPixels:
myXOffset = mMarginHorizontal - 5; // Minus 5 to shift tight into corner
myYOffset = mMarginVertical - 5;
break;
case QgsUnitTypes::RenderPercentage:
myXOffset = ( ( myWidth - size.width() ) / 100. ) * mMarginHorizontal;
myYOffset = ( ( myHeight - size.width() ) / 100. ) * mMarginVertical;
break;
default: // Use default of top left
break;
}
//Determine placement of label from form combo box
switch ( mPlacement )
{
case BottomLeft:
context.painter()->translate( myXOffset, myHeight - myYOffset - size.width() );
break;
case TopLeft:
context.painter()->translate( myXOffset, myYOffset );
break;
case TopRight:
context.painter()->translate( myWidth - myXOffset - size.width(), myYOffset );
break;
case BottomRight:
context.painter()->translate( myWidth - myXOffset - size.width(),
myHeight - myYOffset - size.width() );
break;
default:
{
//QgsDebugMsg("Unable to determine where to put north arrow so defaulting to top left");
}
}
//rotate the canvas by the north arrow rotation amount
context.painter()->rotate( mRotationInt );
//Now we can actually do the drawing, and draw a smooth north arrow even when rotated
context.painter()->translate( xShift, yShift );
svg.render( context.painter(), QRectF( 0, 0, size.width(), size.height() ) );
//unrotate the canvas again
context.painter()->restore();
}
else
{
QFont myQFont( QStringLiteral( "time" ), 12, QFont::Bold );
context.painter()->setFont( myQFont );
context.painter()->setPen( Qt::black );
context.painter()->drawText( 10, 20, tr( "North arrow pixmap not found" ) );
}
}
}
void QgsPointDisplacementRenderer::drawGroup( const DisplacementGroup& group, QgsRenderContext& context )
{
const QgsFeature& feature = group.begin().value().first;
bool selected = mSelectedFeatures.contains( feature.id() ); // maybe we should highlight individual features instead of the whole group?
//get list of labels and symbols
QStringList labelAttributeList;
QList<QgsMarkerSymbolV2*> symbolList;
QgsMultiPointV2* groupMultiPoint = new QgsMultiPointV2();
for ( DisplacementGroup::const_iterator attIt = group.constBegin(); attIt != group.constEnd(); ++attIt )
{
labelAttributeList << ( mDrawLabels ? getLabel( attIt.value().first ) : QString() );
symbolList << dynamic_cast<QgsMarkerSymbolV2*>( attIt.value().second );
groupMultiPoint->addGeometry( attIt.value().first.constGeometry()->geometry()->clone() );
}
//calculate centroid of all points, this will be center of group
QgsGeometry groupGeom( groupMultiPoint );
QgsGeometry* centroid = groupGeom.centroid();
QPointF pt;
_getPoint( pt, context, centroid->asWkb() );
delete centroid;
//calculate max diagonal size from all symbols in group
double diagonal = 0;
Q_FOREACH ( QgsMarkerSymbolV2* symbol, symbolList )
{
if ( symbol )
{
diagonal = qMax( diagonal, QgsSymbolLayerV2Utils::convertToPainterUnits( context,
M_SQRT2 * symbol->size(),
symbol->outputUnit(), symbol->mapUnitScale() ) );
}
}
QgsSymbolV2RenderContext symbolContext( context, QgsSymbolV2::MM, 1.0, selected );
QList<QPointF> symbolPositions;
QList<QPointF> labelPositions;
double circleRadius = -1.0;
calculateSymbolAndLabelPositions( symbolContext, pt, symbolList.size(), diagonal, symbolPositions, labelPositions, circleRadius );
//draw Circle
if ( circleRadius > 0 )
drawCircle( circleRadius, symbolContext, pt, symbolList.size() );
//draw mid point
if ( labelAttributeList.size() > 1 )
{
if ( mCenterSymbol )
{
mCenterSymbol->renderPoint( pt, &feature, context, -1, selected );
}
else
{
context.painter()->drawRect( QRectF( pt.x() - symbolContext.outputLineWidth( 1 ), pt.y() - symbolContext.outputLineWidth( 1 ), symbolContext.outputLineWidth( 2 ), symbolContext.outputLineWidth( 2 ) ) );
}
}
//draw symbols on the circle
drawSymbols( feature, context, symbolList, symbolPositions, selected );
//and also the labels
drawLabels( pt, symbolContext, labelPositions, labelAttributeList );
}
bool QgsHeatmapRenderer::renderFeature( QgsFeature& feature, QgsRenderContext& context, int layer, bool selected, bool drawVertexMarker )
{
Q_UNUSED( layer );
Q_UNUSED( selected );
Q_UNUSED( drawVertexMarker );
if ( !context.painter() )
{
return false;
}
if ( !feature.constGeometry() || feature.constGeometry()->type() != QGis::Point )
{
//can only render point type
return false;
}
double weight = 1.0;
if ( !mWeightExpressionString.isEmpty() )
{
QVariant value;
if ( mWeightAttrNum == -1 )
{
Q_ASSERT( mWeightExpression.data() );
value = mWeightExpression->evaluate( &feature );
}
else
{
QgsAttributes attrs = feature.attributes();
value = attrs.value( mWeightAttrNum );
}
bool ok = false;
double evalWeight = value.toDouble( &ok );
if ( ok )
{
weight = evalWeight;
}
}
int width = context.painter()->device()->width() / mRenderQuality;
int height = context.painter()->device()->height() / mRenderQuality;
//transform geometry if required
QgsGeometry* transformedGeom = 0;
const QgsCoordinateTransform* xform = context.coordinateTransform();
if ( xform )
{
transformedGeom = new QgsGeometry( *feature.constGeometry() );
transformedGeom->transform( *xform );
}
//convert point to multipoint
QgsMultiPoint multiPoint = convertToMultipoint( transformedGeom ? transformedGeom : feature.constGeometry() );
delete transformedGeom;
transformedGeom = 0;
//loop through all points in multipoint
for ( QgsMultiPoint::const_iterator pointIt = multiPoint.constBegin(); pointIt != multiPoint.constEnd(); ++pointIt )
{
QgsPoint pixel = context.mapToPixel().transform( *pointIt );
int pointX = pixel.x() / mRenderQuality;
int pointY = pixel.y() / mRenderQuality;
for ( int x = qMax( pointX - mRadiusPixels, 0 ); x < qMin( pointX + mRadiusPixels, width ); ++x )
{
for ( int y = qMax( pointY - mRadiusPixels, 0 ); y < qMin( pointY + mRadiusPixels, height ); ++y )
{
int index = y * width + x;
if ( index >= mValues.count( ) )
{
continue;
}
double distanceSquared = pow( pointX - x, 2.0 ) + pow( pointY - y, 2.0 );
if ( distanceSquared > mRadiusSquared )
{
continue;
}
double score = weight * quarticKernel( sqrt( distanceSquared ), mRadiusPixels );
double value = mValues[ index ] + score;
if ( value > mCalculatedMaxValue )
{
mCalculatedMaxValue = value;
}
mValues[ index ] = value;
}
}
}
mFeaturesRendered++;
#if 0
//TODO - enable progressive rendering
if ( mFeaturesRendered % 200 == 0 )
{
renderImage( context );
}
#endif
return true;
}
void QgsHistogramDiagram::renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position )
{
QPainter* p = c.painter();
if ( !p )
{
return;
}
QList<double> values;
double maxValue = 0;
QgsExpressionContext expressionContext = c.expressionContext();
expressionContext.setFeature( feature );
if ( !feature.fields().isEmpty() )
expressionContext.setFields( feature.fields() );
Q_FOREACH ( const QString& cat, s.categoryAttributes )
{
QgsExpression* expression = getExpression( cat, expressionContext );
double currentVal = expression->evaluate( &expressionContext ).toDouble();
values.push_back( currentVal );
maxValue = qMax( currentVal, maxValue );
}
double scaledMaxVal = sizePainterUnits( maxValue * mScaleFactor, s, c );
double currentOffset = 0;
double scaledWidth = sizePainterUnits( s.barWidth, s, c );
double baseX = position.x();
double baseY = position.y();
mPen.setColor( s.penColor );
setPenWidth( mPen, s, c );
p->setPen( mPen );
QList<double>::const_iterator valIt = values.constBegin();
QList< QColor >::const_iterator colIt = s.categoryColors.constBegin();
for ( ; valIt != values.constEnd(); ++valIt, ++colIt )
{
double length = sizePainterUnits( *valIt * mScaleFactor, s, c );
mCategoryBrush.setColor( *colIt );
p->setBrush( mCategoryBrush );
switch ( s.diagramOrientation )
{
case QgsDiagramSettings::Up:
p->drawRect( baseX + currentOffset, baseY, scaledWidth, length * -1 );
break;
case QgsDiagramSettings::Down:
p->drawRect( baseX + currentOffset, baseY - scaledMaxVal, scaledWidth, length );
break;
case QgsDiagramSettings::Right:
p->drawRect( baseX, baseY - currentOffset, length, scaledWidth * -1 );
break;
case QgsDiagramSettings::Left:
p->drawRect( baseX + scaledMaxVal, baseY - currentOffset, 0 - length, scaledWidth * -1 );
break;
}
currentOffset += scaledWidth;
}
}
void QgsDecorationNorthArrow::render( const QgsMapSettings &mapSettings, QgsRenderContext &context )
{
if ( !enabled() )
return;
double maxLength = mSize * mapSettings.outputDpi() / 25.4;
QSvgRenderer svg;
const QByteArray &svgContent = QgsApplication::svgCache()->svgContent( svgPath(), maxLength, mColor, mOutlineColor, 1.0, 1.0 );
svg.load( svgContent );
if ( svg.isValid() )
{
QSize size( maxLength, maxLength );
QRectF viewBox = svg.viewBoxF();
if ( viewBox.height() > viewBox.width() )
{
size.setWidth( maxLength * viewBox.width() / viewBox.height() );
}
else
{
size.setHeight( maxLength * viewBox.height() / viewBox.width() );
}
double centerXDouble = size.width() / 2.0;
double centerYDouble = size.height() / 2.0;
//save the current canvas rotation
context.painter()->save();
//
//work out how to shift the image so that it rotates
// properly about its center
//(x cos a + y sin a - x, -x sin a + y cos a - y)
//
// could move this call to somewhere else so that it is only
// called when the projection or map extent changes
if ( mAutomatic )
{
try
{
mRotationInt = QgsBearingUtils:: bearingTrueNorth( mapSettings.destinationCrs(), mapSettings.transformContext(), context.extent().center() );
}
catch ( QgsException & )
{
mRotationInt = 0.0;
}
mRotationInt += mapSettings.rotation();
}
double radiansDouble = mRotationInt * M_PI / 180.0;
int xShift = static_cast<int>( (
( centerXDouble * std::cos( radiansDouble ) ) +
( centerYDouble * std::sin( radiansDouble ) )
) - centerXDouble );
int yShift = static_cast<int>( (
( -centerXDouble * std::sin( radiansDouble ) ) +
( centerYDouble * std::cos( radiansDouble ) )
) - centerYDouble );
// need width/height of paint device
int deviceHeight = context.painter()->device()->height();
int deviceWidth = context.painter()->device()->width();
// Set margin according to selected units
int xOffset = 0;
int yOffset = 0;
switch ( mMarginUnit )
{
case QgsUnitTypes::RenderMillimeters:
{
int pixelsInchX = context.painter()->device()->logicalDpiX();
int pixelsInchY = context.painter()->device()->logicalDpiY();
xOffset = pixelsInchX * INCHES_TO_MM * mMarginHorizontal;
yOffset = pixelsInchY * INCHES_TO_MM * mMarginVertical;
break;
}
case QgsUnitTypes::RenderPixels:
xOffset = mMarginHorizontal - 5; // Minus 5 to shift tight into corner
yOffset = mMarginVertical - 5;
break;
case QgsUnitTypes::RenderPercentage:
xOffset = ( ( deviceWidth - size.width() ) / 100. ) * mMarginHorizontal;
yOffset = ( ( deviceHeight - size.width() ) / 100. ) * mMarginVertical;
break;
case QgsUnitTypes::RenderMapUnits:
case QgsUnitTypes::RenderPoints:
case QgsUnitTypes::RenderInches:
case QgsUnitTypes::RenderUnknownUnit:
case QgsUnitTypes::RenderMetersInMapUnits:
break;
}
//Determine placement of label from form combo box
switch ( mPlacement )
{
case BottomLeft:
context.painter()->translate( xOffset, deviceHeight - yOffset - maxLength + ( maxLength - size.height() ) / 2 );
break;
case TopLeft:
context.painter()->translate( xOffset, yOffset );
break;
case TopRight:
context.painter()->translate( deviceWidth - xOffset - maxLength + ( maxLength - size.width() ) / 2, yOffset );
break;
case BottomRight:
context.painter()->translate( deviceWidth - xOffset - maxLength + ( maxLength - size.width() ) / 2,
deviceHeight - yOffset - maxLength + ( maxLength - size.height() ) / 2 );
break;
}
//rotate the canvas by the north arrow rotation amount
context.painter()->rotate( mRotationInt );
//Now we can actually do the drawing, and draw a smooth north arrow even when rotated
context.painter()->translate( xShift, yShift );
svg.render( context.painter(), QRectF( 0, 0, size.width(), size.height() ) );
//unrotate the canvas again
context.painter()->restore();
}
}
void QgsPointDisplacementRenderer::drawGroup( const DisplacementGroup& group, QgsRenderContext& context )
{
const QgsFeature& feature = group.begin().value().first;
bool selected = mSelectedFeatures.contains( feature.id() ); // maybe we should highlight individual features instead of the whole group?
QPointF pt;
_getPoint( pt, context, feature.constGeometry()->asWkb() );
//get list of labels and symbols
QStringList labelAttributeList;
QList<QgsMarkerSymbolV2*> symbolList;
for ( DisplacementGroup::const_iterator attIt = group.constBegin(); attIt != group.constEnd(); ++attIt )
{
labelAttributeList << ( mDrawLabels ? getLabel( attIt.value().first ) : QString() );
symbolList << dynamic_cast<QgsMarkerSymbolV2*>( attIt.value().second );
}
//draw symbol
double diagonal = 0;
double currentWidthFactor; //scale symbol size to map unit and output resolution
QList<QgsMarkerSymbolV2*>::const_iterator it = symbolList.constBegin();
for ( ; it != symbolList.constEnd(); ++it )
{
if ( *it )
{
currentWidthFactor = QgsSymbolLayerV2Utils::lineWidthScaleFactor( context, ( *it )->outputUnit(), ( *it )->mapUnitScale() );
double currentDiagonal = sqrt( 2 * (( *it )->size() * ( *it )->size() ) ) * currentWidthFactor;
if ( currentDiagonal > diagonal )
{
diagonal = currentDiagonal;
}
}
}
QgsSymbolV2RenderContext symbolContext( context, QgsSymbolV2::MM, 1.0, selected );
double circleAdditionPainterUnits = symbolContext.outputLineWidth( mCircleRadiusAddition );
double radius = qMax(( diagonal / 2 ), labelAttributeList.size() * diagonal / 2 / M_PI ) + circleAdditionPainterUnits;
//draw Circle
drawCircle( radius, symbolContext, pt, symbolList.size() );
QList<QPointF> symbolPositions;
QList<QPointF> labelPositions;
calculateSymbolAndLabelPositions( pt, labelAttributeList.size(), radius, diagonal, symbolPositions, labelPositions );
//draw mid point
if ( labelAttributeList.size() > 1 )
{
if ( mCenterSymbol )
{
mCenterSymbol->renderPoint( pt, &feature, context, -1, selected );
}
else
{
context.painter()->drawRect( QRectF( pt.x() - symbolContext.outputLineWidth( 1 ), pt.y() - symbolContext.outputLineWidth( 1 ), symbolContext.outputLineWidth( 2 ), symbolContext.outputLineWidth( 2 ) ) );
}
}
//draw symbols on the circle
drawSymbols( feature, context, symbolList, symbolPositions, selected );
//and also the labels
drawLabels( pt, symbolContext, labelPositions, labelAttributeList );
}
void QgsTextDiagram::renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position )
{
QPainter* p = c.painter();
if ( !p )
{
return;
}
//convert from mm / map units to painter units
QSizeF spu = sizePainterUnits( s.size, s, c );
double w = spu.width();
double h = spu.height();
double baseX = position.x();
double baseY = position.y() - h;
QVector<QPointF> textPositions; //midpoints for text placement
int nCategories = s.categoryAttributes.size();
for ( int i = 0; i < nCategories; ++i )
{
if ( mOrientation == Horizontal )
{
textPositions.push_back( QPointF( baseX + ( w / nCategories ) * i + w / nCategories / 2.0, baseY + h / 2.0 ) );
}
else //vertical
{
textPositions.push_back( QPointF( baseX + w / 2.0, baseY + h / nCategories * i + w / nCategories / 2.0 ) );
}
}
mPen.setColor( s.penColor );
setPenWidth( mPen, s, c );
p->setPen( mPen );
mBrush.setColor( s.backgroundColor );
p->setBrush( mBrush );
//draw shapes and separator lines first
if ( mShape == Circle )
{
p->drawEllipse( baseX, baseY, w, h );
//draw separator lines
QList<QPointF> intersect; //intersections between shape and separation lines
QPointF center( baseX + w / 2.0, baseY + h / 2.0 );
double r1 = w / 2.0;
double r2 = h / 2.0;
for ( int i = 1; i < nCategories; ++i )
{
if ( mOrientation == Horizontal )
{
lineEllipseIntersection( QPointF( baseX + w / nCategories * i, baseY ), QPointF( baseX + w / nCategories * i, baseY + h ), center, r1, r2, intersect );
}
else //vertical
{
lineEllipseIntersection( QPointF( baseX, baseY + h / nCategories * i ), QPointF( baseX + w, baseY + h / nCategories * i ), center, r1, r2, intersect );
}
if ( intersect.size() > 1 )
{
p->drawLine( intersect.at( 0 ), intersect.at( 1 ) );
}
}
}
else if ( mShape == Rectangle )
{
p->drawRect( QRectF( baseX, baseY, w, h ) );
for ( int i = 1; i < nCategories; ++i )
{
if ( mOrientation == Horizontal )
{
p->drawLine( QPointF( baseX + w / nCategories * i, baseY ), QPointF( baseX + w / nCategories * i, baseY + h ) );
}
else
{
p->drawLine( QPointF( baseX, baseY + h / nCategories * i ), QPointF( baseX + w, baseY + h / nCategories * i ) );
}
}
}
else //triangle
{
QPolygonF triangle;
triangle << QPointF( baseX, baseY + h ) << QPointF( baseX + w, baseY + h ) << QPointF( baseX + w / 2.0, baseY );
p->drawPolygon( triangle );
QLineF triangleEdgeLeft( baseX + w / 2.0, baseY, baseX, baseY + h );
QLineF triangleEdgeRight( baseX + w, baseY + h, baseX + w / 2.0, baseY );
QPointF intersectionPoint1, intersectionPoint2;
for ( int i = 1; i < nCategories; ++i )
{
if ( mOrientation == Horizontal )
{
QLineF verticalLine( baseX + w / nCategories * i, baseY + h, baseX + w / nCategories * i, baseY );
if ( baseX + w / nCategories * i < baseX + w / 2.0 )
{
verticalLine.intersect( triangleEdgeLeft, &intersectionPoint1 );
}
else
{
verticalLine.intersect( triangleEdgeRight, &intersectionPoint1 );
}
p->drawLine( QPointF( baseX + w / nCategories * i, baseY + h ), intersectionPoint1 );
}
else //vertical
{
QLineF horizontalLine( baseX, baseY + h / nCategories * i, baseX + w, baseY + h / nCategories * i );
horizontalLine.intersect( triangleEdgeLeft, &intersectionPoint1 );
horizontalLine.intersect( triangleEdgeRight, &intersectionPoint2 );
p->drawLine( intersectionPoint1, intersectionPoint2 );
}
}
}
//draw text
QFont sFont = scaledFont( s, c );
QFontMetricsF fontMetrics( sFont );
p->setFont( sFont );
QgsExpressionContext expressionContext = c.expressionContext();
expressionContext.setFeature( feature );
if ( feature.fields() )
expressionContext.setFields( *feature.fields() );
for ( int i = 0; i < textPositions.size(); ++i )
{
QgsExpression* expression = getExpression( s.categoryAttributes.at( i ), expressionContext );
QString val = expression->evaluate( &expressionContext ).toString();
//find out dimesions
double textWidth = fontMetrics.width( val );
double textHeight = fontMetrics.height();
mPen.setColor( s.categoryColors.at( i ) );
p->setPen( mPen );
QPointF position = textPositions.at( i );
// Calculate vertical placement
double xOffset = 0;
switch ( s.labelPlacementMethod )
{
case QgsDiagramSettings::Height:
xOffset = textHeight / 2.0;
break;
case QgsDiagramSettings::XHeight:
xOffset = fontMetrics.xHeight();
break;
}
p->drawText( QPointF( position.x() - textWidth / 2.0, position.y() + xOffset ), val );
}
}
