int QgsPalLayerSettings::sizeToPixel( double size, const QgsRenderContext& c ) const
{
double pixelSize;
if ( fontSizeInMapUnits )
{
pixelSize = size / c.mapToPixel().mapUnitsPerPixel() * c.rasterScaleFactor();
}
else //font size in points
{
// set font size from points to output size
pixelSize = 0.3527 * size * c.scaleFactor() * c.rasterScaleFactor();
}
return ( int )( pixelSize + 0.5 );
}
int QgsPieDiagramFactory::getDiagramDimensions( int size, const QgsFeature& f, const QgsRenderContext& context, int& width, int& height ) const
{
double squareSide = size * diagramSizeScaleFactor( context ) * context.rasterScaleFactor() + 2 * mMaximumPenWidth + 2 * mMaximumGap;
width = squareSide;
height = squareSide;
return 0;
}
void QgsUniqueValueRenderer::renderFeature( QgsRenderContext &renderContext, QgsFeature& f, QImage* img, bool selected, double opacity )
{
QPainter *p = renderContext.painter();
QgsSymbol* symbol = symbolForFeature( &f );
if ( !symbol ) //no matching symbol
{
if ( img && mGeometryType == QGis::Point )
{
img->fill( 0 );
}
else if ( mGeometryType != QGis::Point )
{
p->setPen( Qt::NoPen );
p->setBrush( Qt::NoBrush );
}
return;
}
// Point
if ( img && mGeometryType == QGis::Point )
{
double fieldScale = 1.0;
double rotation = 0.0;
if ( symbol->scaleClassificationField() >= 0 )
{
//first find out the value for the scale classification attribute
fieldScale = sqrt( qAbs( f.attribute( symbol->scaleClassificationField() ).toDouble() ) );
}
if ( symbol->rotationClassificationField() >= 0 )
{
rotation = f.attribute( symbol->rotationClassificationField() ).toDouble();
}
QString oldName;
if ( symbol->symbolField() >= 0 )
{
QString name = f.attribute( symbol->symbolField() ).toString();
oldName = symbol->pointSymbolName();
symbol->setNamedPointSymbol( name );
}
double scale = renderContext.scaleFactor();
if ( symbol->pointSizeUnits() )
{
scale = 1.0 / renderContext.mapToPixel().mapUnitsPerPixel();
}
*img = symbol->getPointSymbolAsImage( scale, selected, mSelectionColor,
fieldScale, rotation, renderContext.rasterScaleFactor(),
opacity );
if ( !oldName.isNull() )
{
symbol->setNamedPointSymbol( oldName );
}
}
// Line, polygon
else if ( mGeometryType != QGis::Point )
{
if ( !selected )
{
QPen pen = symbol->pen();
pen.setWidthF( renderContext.scaleFactor() * pen.widthF() );
p->setPen( pen );
if ( mGeometryType == QGis::Polygon )
{
QBrush brush = symbol->brush();
scaleBrush( brush, renderContext.rasterScaleFactor() ); //scale brush content for printout
p->setBrush( brush );
}
}
else
{
QPen pen = symbol->pen();
pen.setWidthF( renderContext.scaleFactor() * pen.widthF() );
if ( mGeometryType == QGis::Polygon )
{
QBrush brush = symbol->brush();
scaleBrush( brush, renderContext.rasterScaleFactor() ); //scale brush content for printout
brush.setColor( mSelectionColor );
p->setBrush( brush );
}
else //don't draw outlines of polygons in selection color otherwise they appear merged
{
pen.setColor( mSelectionColor );
}
p->setPen( pen );
}
}
}
QgsRasterLayerRenderer::QgsRasterLayerRenderer( QgsRasterLayer* layer, QgsRenderContext& rendererContext )
: QgsMapLayerRenderer( layer->id() )
, mRasterViewPort( nullptr )
, mPipe( nullptr )
{
mPainter = rendererContext.painter();
const QgsMapToPixel& theQgsMapToPixel = rendererContext.mapToPixel();
mMapToPixel = &theQgsMapToPixel;
QgsMapToPixel mapToPixel = theQgsMapToPixel;
if ( mapToPixel.mapRotation() )
{
// unset rotation for the sake of local computations.
// Rotation will be handled by QPainter later
// TODO: provide a method of QgsMapToPixel to fetch map center
// in geographical units
QgsPoint center = mapToPixel.toMapCoordinates(
mapToPixel.mapWidth() / 2.0,
mapToPixel.mapHeight() / 2.0
);
mapToPixel.setMapRotation( 0, center.x(), center.y() );
}
QgsRectangle myProjectedViewExtent;
QgsRectangle myProjectedLayerExtent;
if ( rendererContext.coordinateTransform() )
{
QgsDebugMsg( "coordinateTransform set -> project extents." );
try
{
myProjectedViewExtent = rendererContext.coordinateTransform()->transformBoundingBox( rendererContext.extent() );
}
catch ( QgsCsException &cs )
{
QgsMessageLog::logMessage( QObject::tr( "Could not reproject view extent: %1" ).arg( cs.what() ), QObject::tr( "Raster" ) );
myProjectedViewExtent.setMinimal();
}
try
{
myProjectedLayerExtent = rendererContext.coordinateTransform()->transformBoundingBox( layer->extent() );
}
catch ( QgsCsException &cs )
{
QgsMessageLog::logMessage( QObject::tr( "Could not reproject layer extent: %1" ).arg( cs.what() ), QObject::tr( "Raster" ) );
myProjectedLayerExtent.setMinimal();
}
}
else
{
QgsDebugMsg( "coordinateTransform not set" );
myProjectedViewExtent = rendererContext.extent();
myProjectedLayerExtent = layer->extent();
}
// clip raster extent to view extent
QgsRectangle myRasterExtent = myProjectedViewExtent.intersect( &myProjectedLayerExtent );
if ( myRasterExtent.isEmpty() )
{
QgsDebugMsg( "draw request outside view extent." );
// nothing to do
return;
}
QgsDebugMsg( "theViewExtent is " + rendererContext.extent().toString() );
QgsDebugMsg( "myProjectedViewExtent is " + myProjectedViewExtent.toString() );
QgsDebugMsg( "myProjectedLayerExtent is " + myProjectedLayerExtent.toString() );
QgsDebugMsg( "myRasterExtent is " + myRasterExtent.toString() );
//
// The first thing we do is set up the QgsRasterViewPort. This struct stores all the settings
// relating to the size (in pixels and coordinate system units) of the raster part that is
// in view in the map window. It also stores the origin.
//
//this is not a class level member because every time the user pans or zooms
//the contents of the rasterViewPort will change
mRasterViewPort = new QgsRasterViewPort();
mRasterViewPort->mDrawnExtent = myRasterExtent;
if ( rendererContext.coordinateTransform() )
{
mRasterViewPort->mSrcCRS = layer->crs();
mRasterViewPort->mDestCRS = rendererContext.coordinateTransform()->destCRS();
mRasterViewPort->mSrcDatumTransform = rendererContext.coordinateTransform()->sourceDatumTransform();
mRasterViewPort->mDestDatumTransform = rendererContext.coordinateTransform()->destinationDatumTransform();
}
else
{
mRasterViewPort->mSrcCRS = QgsCoordinateReferenceSystem(); // will be invalid
mRasterViewPort->mDestCRS = QgsCoordinateReferenceSystem(); // will be invalid
mRasterViewPort->mSrcDatumTransform = -1;
mRasterViewPort->mDestDatumTransform = -1;
}
// get dimensions of clipped raster image in device coordinate space (this is the size of the viewport)
mRasterViewPort->mTopLeftPoint = mapToPixel.transform( myRasterExtent.xMinimum(), myRasterExtent.yMaximum() );
mRasterViewPort->mBottomRightPoint = mapToPixel.transform( myRasterExtent.xMaximum(), myRasterExtent.yMinimum() );
// align to output device grid, i.e. floor/ceil to integers
// TODO: this should only be done if paint device is raster - screen, image
// for other devices (pdf) it can have floating point origin
// we could use floating point for raster devices as well, but respecting the
// output device grid should make it more effective as the resampling is done in
// the provider anyway
mRasterViewPort->mTopLeftPoint.setX( floor( mRasterViewPort->mTopLeftPoint.x() ) );
mRasterViewPort->mTopLeftPoint.setY( floor( mRasterViewPort->mTopLeftPoint.y() ) );
mRasterViewPort->mBottomRightPoint.setX( ceil( mRasterViewPort->mBottomRightPoint.x() ) );
mRasterViewPort->mBottomRightPoint.setY( ceil( mRasterViewPort->mBottomRightPoint.y() ) );
// recalc myRasterExtent to aligned values
myRasterExtent.set(
mapToPixel.toMapCoordinatesF( mRasterViewPort->mTopLeftPoint.x(),
mRasterViewPort->mBottomRightPoint.y() ),
mapToPixel.toMapCoordinatesF( mRasterViewPort->mBottomRightPoint.x(),
mRasterViewPort->mTopLeftPoint.y() )
);
//raster viewport top left / bottom right are already rounded to int
mRasterViewPort->mWidth = static_cast<int>( mRasterViewPort->mBottomRightPoint.x() - mRasterViewPort->mTopLeftPoint.x() );
mRasterViewPort->mHeight = static_cast<int>( mRasterViewPort->mBottomRightPoint.y() - mRasterViewPort->mTopLeftPoint.y() );
//the drawable area can start to get very very large when you get down displaying 2x2 or smaller, this is becasue
//mapToPixel.mapUnitsPerPixel() is less then 1,
//so we will just get the pixel data and then render these special cases differently in paintImageToCanvas()
QgsDebugMsgLevel( QString( "mapUnitsPerPixel = %1" ).arg( mapToPixel.mapUnitsPerPixel() ), 3 );
QgsDebugMsgLevel( QString( "mWidth = %1" ).arg( layer->width() ), 3 );
QgsDebugMsgLevel( QString( "mHeight = %1" ).arg( layer->height() ), 3 );
QgsDebugMsgLevel( QString( "myRasterExtent.xMinimum() = %1" ).arg( myRasterExtent.xMinimum() ), 3 );
QgsDebugMsgLevel( QString( "myRasterExtent.xMaximum() = %1" ).arg( myRasterExtent.xMaximum() ), 3 );
QgsDebugMsgLevel( QString( "myRasterExtent.yMinimum() = %1" ).arg( myRasterExtent.yMinimum() ), 3 );
QgsDebugMsgLevel( QString( "myRasterExtent.yMaximum() = %1" ).arg( myRasterExtent.yMaximum() ), 3 );
QgsDebugMsgLevel( QString( "mTopLeftPoint.x() = %1" ).arg( mRasterViewPort->mTopLeftPoint.x() ), 3 );
QgsDebugMsgLevel( QString( "mBottomRightPoint.x() = %1" ).arg( mRasterViewPort->mBottomRightPoint.x() ), 3 );
QgsDebugMsgLevel( QString( "mTopLeftPoint.y() = %1" ).arg( mRasterViewPort->mTopLeftPoint.y() ), 3 );
QgsDebugMsgLevel( QString( "mBottomRightPoint.y() = %1" ).arg( mRasterViewPort->mBottomRightPoint.y() ), 3 );
QgsDebugMsgLevel( QString( "mWidth = %1" ).arg( mRasterViewPort->mWidth ), 3 );
QgsDebugMsgLevel( QString( "mHeight = %1" ).arg( mRasterViewPort->mHeight ), 3 );
// /\/\/\ - added to handle zoomed-in rasters
// TODO R->mLastViewPort = *mRasterViewPort;
// TODO: is it necessary? Probably WMS only?
layer->dataProvider()->setDpi( rendererContext.rasterScaleFactor() * 25.4 * rendererContext.scaleFactor() );
// copy the whole raster pipe!
mPipe = new QgsRasterPipe( *layer->pipe() );
}
void QgsLabel::renderLabel( QgsRenderContext &renderContext,
QgsFeature &feature, bool selected,
QgsLabelAttributes *classAttributes )
{
Q_UNUSED( classAttributes );
if ( mLabelAttributes->selectedOnly() && !selected )
return;
QPen pen;
QFont font;
QString value;
QString text;
/* Calc scale (not nice) */
QgsPoint point;
point = renderContext.mapToPixel().transform( 0, 0 );
double x1 = point.x();
point = renderContext.mapToPixel().transform( 1000, 0 );
double x2 = point.x();
double scale = ( x2 - x1 ) * 0.001;
/* Text */
value = fieldValue( Text, feature );
if ( value.isEmpty() )
{
text = mLabelAttributes->text();
}
else
{
text = value;
}
/* Font */
value = fieldValue( Family, feature );
if ( value.isEmpty() )
{
font.setFamily( mLabelAttributes->family() );
}
else
{
font.setFamily( value );
}
double size;
value = fieldValue( Size, feature );
if ( value.isEmpty() )
{
size = mLabelAttributes->size();
}
else
{
size = value.toDouble();
}
int sizeType;
value = fieldValue( SizeType, feature );
if ( value.isEmpty() )
sizeType = mLabelAttributes->sizeType();
else
{
value = value.toLower();
if ( value.compare( "mapunits" ) == 0 )
sizeType = QgsLabelAttributes::MapUnits;
else
sizeType = QgsLabelAttributes::PointUnits;
}
if ( sizeType == QgsLabelAttributes::MapUnits )
{
size *= scale;
}
else //point units
{
double sizeMM = size * 0.3527;
size = sizeMM * renderContext.scaleFactor();
}
//Request font larger (multiplied by rasterScaleFactor) as a workaround for the Qt font bug
//and scale the painter down by rasterScaleFactor when drawing the label
size *= renderContext.rasterScaleFactor();
if (( int )size <= 0 )
// skip too small labels
return;
font.setPixelSize( size );
value = fieldValue( Color, feature );
if ( value.isEmpty() )
{
pen.setColor( mLabelAttributes->color() );
}
else
{
pen.setColor( QColor( value ) );
}
value = fieldValue( Bold, feature );
if ( value.isEmpty() )
{
font.setBold( mLabelAttributes->bold() );
}
else
{
font.setBold(( bool ) value.toInt() );
}
value = fieldValue( Italic, feature );
if ( value.isEmpty() )
{
font.setItalic( mLabelAttributes->italic() );
}
else
{
font.setItalic(( bool ) value.toInt() );
}
value = fieldValue( Underline, feature );
if ( value.isEmpty() )
{
font.setUnderline( mLabelAttributes->underline() );
}
else
{
font.setUnderline(( bool ) value.toInt() );
}
value = fieldValue( StrikeOut, feature );
if ( value.isEmpty() )
{
font.setStrikeOut( mLabelAttributes->strikeOut() );
}
else
{
font.setStrikeOut(( bool ) value.toInt() );
}
//
QgsPoint overridePoint;
bool useOverridePoint = false;
value = fieldValue( XCoordinate, feature );
if ( !value.isEmpty() )
{
overridePoint.setX( value.toDouble() );
useOverridePoint = true;
}
value = fieldValue( YCoordinate, feature );
if ( !value.isEmpty() )
{
overridePoint.setY( value.toDouble() );
useOverridePoint = true;
}
/* Alignment */
int alignment;
QFontMetrics fm( font );
int width, height;
if ( mLabelAttributes->multilineEnabled() )
{
QStringList texts = text.split( "\n" );
width = 0;
for ( int i = 0; i < texts.size(); i++ )
{
int w = fm.width( texts[i] );
if ( w > width )
width = w;
}
height = fm.height() * texts.size();
}
else
{
width = fm.width( text );
height = fm.height();
}
int dx = 0;
int dy = 0;
value = fieldValue( Alignment, feature );
if ( value.isEmpty() )
{
alignment = mLabelAttributes->alignment();
}
else
{
value = value.toLower();
alignment = 0;
if ( value.contains( "left" ) )
alignment |= Qt::AlignLeft;
else if ( value.contains( "right" ) )
alignment |= Qt::AlignRight;
else
alignment |= Qt::AlignHCenter;
if ( value.contains( "bottom" ) )
alignment |= Qt::AlignBottom;
else if ( value.contains( "top" ) )
alignment |= Qt::AlignTop;
else
alignment |= Qt::AlignVCenter;
}
if ( alignment & Qt::AlignLeft )
{
dx = 0;
}
else if ( alignment & Qt::AlignHCenter )
{
dx = -width / 2;
}
else if ( alignment & Qt::AlignRight )
{
dx = -width;
}
if ( alignment & Qt::AlignBottom )
{
dy = 0;
}
else if ( alignment & Qt::AlignVCenter )
{
dy = height / 2;
}
else if ( alignment & Qt::AlignTop )
{
dy = height;
}
// Offset
double xoffset, yoffset;
value = fieldValue( XOffset, feature );
if ( value.isEmpty() )
{
xoffset = mLabelAttributes->xOffset();
}
else
{
xoffset = value.toDouble();
}
value = fieldValue( YOffset, feature );
if ( value.isEmpty() )
{
yoffset = mLabelAttributes->yOffset();
}
else
{
yoffset = value.toDouble();
}
// recalc offset to pixels
if ( mLabelAttributes->offsetType() == QgsLabelAttributes::MapUnits )
{
xoffset *= scale;
yoffset *= scale;
}
else
{
xoffset = xoffset * 0.3527 * renderContext.scaleFactor();
yoffset = yoffset * 0.3527 * renderContext.scaleFactor();
}
// Angle
double ang;
value = fieldValue( Angle, feature );
if ( value.isEmpty() )
{
ang = mLabelAttributes->angle();
}
else
{
ang = value.toDouble();
}
// Work out a suitable position to put the label for the
// feature. For multi-geometries, put the same label on each
// part.
if ( useOverridePoint )
{
renderLabel( renderContext, overridePoint, text, font, pen, dx, dy,
xoffset, yoffset, ang, width, height, alignment );
}
else
{
std::vector<labelpoint> points;
labelPoint( points, feature );
for ( uint i = 0; i < points.size(); ++i )
{
renderLabel( renderContext, points[i].p, text, font, pen, dx, dy,
xoffset, yoffset, mLabelAttributes->angleIsAuto() ? points[i].angle : ang, width, height, alignment );
}
}
}
void QgsLabel::renderLabel( QgsRenderContext &renderContext,
QgsPoint point,
QString text, QFont font, QPen pen,
int dx, int dy,
double xoffset, double yoffset,
double ang,
int width, int height, int alignment )
{
QPainter *painter = renderContext.painter();
// Convert point to projected units
if ( renderContext.coordinateTransform() )
{
try
{
point = renderContext.coordinateTransform()->transform( point );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse ); // unused otherwise
QgsDebugMsg( "Caught transform error. Skipping rendering this label" );
return;
}
}
// and then to canvas units
renderContext.mapToPixel().transform( &point );
double x = point.x();
double y = point.y();
double rad = ang * M_PI / 180;
x = x + xoffset * cos( rad ) - yoffset * sin( rad );
y = y - xoffset * sin( rad ) - yoffset * cos( rad );
painter->save();
painter->setFont( font );
painter->translate( x, y );
//correct oversampled font size back by scaling painter down
painter->scale( 1.0 / renderContext.rasterScaleFactor(), 1.0 / renderContext.rasterScaleFactor() );
painter->rotate( -ang );
//
// Draw a buffer behind the text if one is desired
//
if ( mLabelAttributes->bufferSizeIsSet() && mLabelAttributes->bufferEnabled() )
{
double myBufferSize = mLabelAttributes->bufferSize() * 0.3527 * renderContext.scaleFactor() * renderContext.rasterScaleFactor();
QPen bufferPen;
if ( mLabelAttributes->bufferColorIsSet() )
{
bufferPen.setColor( mLabelAttributes->bufferColor() );
}
else //default to a white buffer
{
bufferPen.setColor( Qt::white );
}
painter->setPen( bufferPen );
double bufferStepSize; //hack to distinguish pixel devices from logical devices
if (( renderContext.scaleFactor() - 1 ) > 1.5 )
{
bufferStepSize = 1;
}
else //draw more dense in case of logical devices
{
bufferStepSize = 1 / renderContext.rasterScaleFactor();
}
for ( double i = dx - myBufferSize; i <= dx + myBufferSize; i += bufferStepSize )
{
for ( double j = dy - myBufferSize; j <= dy + myBufferSize; j += bufferStepSize )
{
if ( mLabelAttributes->multilineEnabled() )
painter->drawText( QRectF( i, j - height, width, height ), alignment, text );
else
painter->drawText( QPointF( i, j ), text );
}
}
}
painter->setPen( pen );
if ( mLabelAttributes->multilineEnabled() )
painter->drawText( dx, dy - height, width, height, alignment, text );
else
painter->drawText( dx, dy, text );
painter->restore();
}
int QgsPalLabeling::prepareLayer( QgsVectorLayer* layer, QSet<int>& attrIndices, QgsRenderContext& ctx )
{
Q_ASSERT( mMapRenderer != NULL );
// start with a temporary settings class, find out labeling info
QgsPalLayerSettings lyrTmp;
lyrTmp.readFromLayer( layer );
if ( !lyrTmp.enabled )
return 0;
// find out which field will be needed
int fldIndex = layer->fieldNameIndex( lyrTmp.fieldName );
if ( fldIndex == -1 )
return 0;
attrIndices.insert( fldIndex );
//add indices of data defined fields
QMap< QgsPalLayerSettings::DataDefinedProperties, int >::const_iterator dIt = lyrTmp.dataDefinedProperties.constBegin();
for ( ; dIt != lyrTmp.dataDefinedProperties.constEnd(); ++dIt )
{
attrIndices.insert( dIt.value() );
}
// add layer settings to the pallabeling hashtable: <QgsVectorLayer*, QgsPalLayerSettings>
mActiveLayers.insert( layer, lyrTmp );
// start using the reference to the layer in hashtable instead of local instance
QgsPalLayerSettings& lyr = mActiveLayers[layer];
// how to place the labels
Arrangement arrangement;
switch ( lyr.placement )
{
case QgsPalLayerSettings::AroundPoint: arrangement = P_POINT; break;
case QgsPalLayerSettings::OverPoint: arrangement = P_POINT_OVER; break;
case QgsPalLayerSettings::Line: arrangement = P_LINE; break;
case QgsPalLayerSettings::Curved: arrangement = P_CURVED; break;
case QgsPalLayerSettings::Horizontal: arrangement = P_HORIZ; break;
case QgsPalLayerSettings::Free: arrangement = P_FREE; break;
default: Q_ASSERT( "unsupported placement" && 0 ); return 0;
}
// create the pal layer
double priority = 1 - lyr.priority / 10.0; // convert 0..10 --> 1..0
double min_scale = -1, max_scale = -1;
if ( lyr.scaleMin != 0 && lyr.scaleMax != 0 )
{
min_scale = lyr.scaleMin;
max_scale = lyr.scaleMax;
}
Layer* l = mPal->addLayer( layer->id().toUtf8().data(),
min_scale, max_scale, arrangement,
METER, priority, lyr.obstacle, true, true );
if ( lyr.placementFlags )
l->setArrangementFlags( lyr.placementFlags );
// set label mode (label per feature is the default)
l->setLabelMode( lyr.labelPerPart ? Layer::LabelPerFeaturePart : Layer::LabelPerFeature );
// set whether adjacent lines should be merged
l->setMergeConnectedLines( lyr.mergeLines );
lyr.textFont.setPixelSize( lyr.sizeToPixel( lyr.textFont.pointSizeF(), ctx ) );
//raster and vector scale factors
lyr.vectorScaleFactor = ctx.scaleFactor();
lyr.rasterCompressFactor = ctx.rasterScaleFactor();
// save the pal layer to our layer context (with some additional info)
lyr.palLayer = l;
lyr.fieldIndex = fldIndex;
lyr.fontMetrics = new QFontMetricsF( lyr.textFont );
lyr.xform = mMapRenderer->coordinateTransform();
if ( mMapRenderer->hasCrsTransformEnabled() )
lyr.ct = new QgsCoordinateTransform( layer->crs(), mMapRenderer->destinationCrs() );
else
lyr.ct = NULL;
lyr.ptZero = lyr.xform->toMapCoordinates( 0, 0 );
lyr.ptOne = lyr.xform->toMapCoordinates( 1, 0 );
// rect for clipping
lyr.extentGeom = QgsGeometry::fromRect( mMapRenderer->extent() );
return 1; // init successful
}
void QgsGraduatedSymbolRenderer::renderFeature( QgsRenderContext &renderContext, QgsFeature & f, QImage* img, bool selected, double opacity )
{
QPainter *p = renderContext.painter();
QgsSymbol* theSymbol = symbolForFeature( &f );
if ( !theSymbol )
{
if ( img && mGeometryType == QGis::Point )
{
img->fill( 0 );
}
else if ( mGeometryType != QGis::Point )
{
p->setPen( Qt::NoPen );
p->setBrush( Qt::NoBrush );
}
return;
}
//set the qpen and qpainter to the right values
// Point
if ( img && mGeometryType == QGis::Point )
{
double fieldScale = 1.0;
double rotation = 0.0;
if ( theSymbol->scaleClassificationField() >= 0 )
{
//first find out the value for the scale classification attribute
const QgsAttributeMap& attrs = f.attributeMap();
fieldScale = sqrt( qAbs( attrs[theSymbol->scaleClassificationField()].toDouble() ) );
QgsDebugMsgLevel( QString( "Feature has field scale factor %1" ).arg( fieldScale ), 3 );
}
if ( theSymbol->rotationClassificationField() >= 0 )
{
const QgsAttributeMap& attrs = f.attributeMap();
rotation = attrs[theSymbol->rotationClassificationField()].toDouble();
QgsDebugMsgLevel( QString( "Feature has rotation factor %1" ).arg( rotation ), 3 );
}
QString oldName;
if ( theSymbol->symbolField() >= 0 )
{
const QgsAttributeMap& attrs = f.attributeMap();
QString name = attrs[theSymbol->symbolField()].toString();
QgsDebugMsgLevel( QString( "Feature has name %1" ).arg( name ), 3 );
oldName = theSymbol->pointSymbolName();
theSymbol->setNamedPointSymbol( name );
}
double scale = renderContext.scaleFactor();
if ( theSymbol->pointSizeUnits() )
{
scale = 1.0 / renderContext.mapToPixel().mapUnitsPerPixel();
}
*img = theSymbol->getPointSymbolAsImage( scale, selected, mSelectionColor, fieldScale,
rotation, renderContext.rasterScaleFactor(), opacity );
if ( !oldName.isNull() )
{
theSymbol->setNamedPointSymbol( oldName );
}
}
// Line, polygon
if ( mGeometryType != QGis::Point )
{
if ( !selected )
{
QPen pen = theSymbol->pen();
pen.setWidthF( renderContext.scaleFactor() * pen.widthF() );
p->setPen( pen );
if ( mGeometryType == QGis::Polygon )
{
QBrush brush = theSymbol->brush();
scaleBrush( brush, renderContext.rasterScaleFactor() ); //scale brush content for printout
p->setBrush( brush );
}
}
else
{
QPen pen = theSymbol->pen();
pen.setWidthF( renderContext.scaleFactor() * pen.widthF() );
if ( mGeometryType == QGis::Polygon )
{
QBrush brush = theSymbol->brush();
scaleBrush( brush, renderContext.rasterScaleFactor() ); //scale brush content for printout
brush.setColor( mSelectionColor );
p->setBrush( brush );
}
else //don't draw outlines in selection color for polys otherwise they appear merged
{
pen.setColor( mSelectionColor );
}
p->setPen( pen );
}
}
}
void QgsContinuousColorRenderer::renderFeature( QgsRenderContext &renderContext, QgsFeature & f, QImage* img, bool selected, double opacity )
{
QPainter *p = renderContext.painter();
if (( mMinimumSymbol && mMaximumSymbol ) )
{
//first find out the value for the classification attribute
const QgsAttributes& attrs = f.attributes();
if ( attrs[mClassificationField].isNull() )
{
if ( img )
*img = QImage();
}
double fvalue = attrs[mClassificationField].toDouble();
//double fvalue = vec[mClassificationField].fieldValue().toDouble();
double minvalue = mMinimumSymbol->lowerValue().toDouble();
double maxvalue = mMaximumSymbol->lowerValue().toDouble();
QColor mincolor, maxcolor;
if ( mGeometryType == QGis::Line || mGeometryType == QGis::Point )
{
mincolor = mMinimumSymbol->pen().color();
maxcolor = mMaximumSymbol->pen().color();
}
else //if polygon
{
p->setPen( mMinimumSymbol->pen() );
mincolor = mMinimumSymbol->fillColor();
maxcolor = mMaximumSymbol->fillColor();
}
int red, green, blue;
if (( maxvalue - minvalue ) != 0 )
{
red = int ( maxcolor.red() * ( fvalue - minvalue ) / ( maxvalue - minvalue ) + mincolor.red() * ( maxvalue - fvalue ) / ( maxvalue - minvalue ) );
green = int ( maxcolor.green() * ( fvalue - minvalue ) / ( maxvalue - minvalue ) + mincolor.green() * ( maxvalue - fvalue ) / ( maxvalue - minvalue ) );
blue = int ( maxcolor.blue() * ( fvalue - minvalue ) / ( maxvalue - minvalue ) + mincolor.blue() * ( maxvalue - fvalue ) / ( maxvalue - minvalue ) );
}
else
{
red = int ( mincolor.red() );
green = int ( mincolor.green() );
blue = int ( mincolor.blue() );
}
if ( mGeometryType == QGis::Point && img )
{
// TODO we must get always new marker -> slow, but continuous color for points
// probably is not used frequently
// Use color for both pen and brush (user can add another layer with outpine)
// later add support for both pen and brush to dialog
QPen pen = mMinimumSymbol->pen();
pen.setColor( QColor( red, green, blue ) );
pen.setWidthF( renderContext.scaleFactor() * pen.widthF() );
QBrush brush = mMinimumSymbol->brush();
if ( selected )
{
pen.setColor( mSelectionColor );
brush.setColor( mSelectionColor );
}
else
{
brush.setColor( QColor( red, green, blue ) );
}
brush.setStyle( Qt::SolidPattern );
*img = QgsMarkerCatalogue::instance()->imageMarker( mMinimumSymbol->pointSymbolName(),
mMinimumSymbol->pointSize() * renderContext.scaleFactor() * renderContext.rasterScaleFactor(),
pen, brush, opacity );
}
else if ( mGeometryType == QGis::Line )
{
QPen linePen;
linePen.setColor( QColor( red, green, blue ) );
linePen.setWidthF( renderContext.scaleFactor()*mMinimumSymbol->pen().widthF() );
p->setPen( linePen );
}
else //polygon
{
p->setBrush( QColor( red, green, blue ) );
if ( mDrawPolygonOutline )
{
QPen pen;
pen.setColor( QColor( 0, 0, 0 ) );
pen.setWidthF( renderContext.scaleFactor()*mMinimumSymbol->pen().widthF() );
p->setPen( pen );
}
else
{
p->setPen( Qt::NoPen );
}
}
if ( selected )
{
//for polygons we don't use selection color for outline
//otherwise adjacent features appear merged when selected
if ( mGeometryType != QGis::Polygon )
{
QPen pen = mMinimumSymbol->pen();
pen.setColor( mSelectionColor );
p->setPen( pen );
}
QBrush brush = mMinimumSymbol->brush();
brush.setColor( mSelectionColor );
p->setBrush( brush );
}
}
}
