QgsLabelFeature* QgsVectorLayerDiagramProvider::registerDiagram( QgsFeature& feat, QgsRenderContext &context, QgsGeometry* obstacleGeometry )
{
const QgsMapSettings& mapSettings = mEngine->mapSettings();
const QgsDiagramRenderer* dr = mSettings.getRenderer();
if ( dr )
{
QList<QgsDiagramSettings> settingList = dr->diagramSettings();
if ( !settingList.isEmpty() && settingList.at( 0 ).scaleBasedVisibility )
{
double minScale = settingList.at( 0 ).minScaleDenominator;
if ( minScale > 0 && context.rendererScale() < minScale )
{
return nullptr;
}
double maxScale = settingList.at( 0 ).maxScaleDenominator;
if ( maxScale > 0 && context.rendererScale() > maxScale )
{
return nullptr;
}
}
}
//convert geom to geos
QgsGeometry geom = feat.geometry();
QgsGeometry extentGeom = QgsGeometry::fromRect( mapSettings.visibleExtent() );
if ( !qgsDoubleNear( mapSettings.rotation(), 0.0 ) )
{
//PAL features are prerotated, so extent also needs to be unrotated
extentGeom.rotate( -mapSettings.rotation(), mapSettings.visibleExtent().center() );
}
const GEOSGeometry* geos_geom = nullptr;
QScopedPointer<QgsGeometry> scopedPreparedGeom;
if ( QgsPalLabeling::geometryRequiresPreparation( geom, context, mSettings.coordinateTransform(), &extentGeom ) )
{
scopedPreparedGeom.reset( new QgsGeometry( QgsPalLabeling::prepareGeometry( geom, context, mSettings.coordinateTransform(), &extentGeom ) ) );
QgsGeometry* preparedGeom = scopedPreparedGeom.data();
if ( preparedGeom->isEmpty() )
return nullptr;
geos_geom = preparedGeom->asGeos();
}
else
{
geos_geom = geom.asGeos();
}
if ( !geos_geom )
return nullptr; // invalid geometry
GEOSGeometry* geomCopy = GEOSGeom_clone_r( QgsGeometry::getGEOSHandler(), geos_geom );
const GEOSGeometry* geosObstacleGeom = nullptr;
QScopedPointer<QgsGeometry> scopedObstacleGeom;
if ( mSettings.isObstacle() && obstacleGeometry && QgsPalLabeling::geometryRequiresPreparation( *obstacleGeometry, context, mSettings.coordinateTransform(), &extentGeom ) )
{
QgsGeometry preparedObstacleGeom = QgsPalLabeling::prepareGeometry( *obstacleGeometry, context, mSettings.coordinateTransform(), &extentGeom );
geosObstacleGeom = preparedObstacleGeom.asGeos();
}
else if ( mSettings.isObstacle() && obstacleGeometry )
{
geosObstacleGeom = obstacleGeometry->asGeos();
}
GEOSGeometry* geosObstacleGeomClone = nullptr;
if ( geosObstacleGeom )
{
geosObstacleGeomClone = GEOSGeom_clone_r( QgsGeometry::getGEOSHandler(), geosObstacleGeom );
}
double diagramWidth = 0;
double diagramHeight = 0;
if ( dr )
{
QSizeF diagSize = dr->sizeMapUnits( feat, context );
if ( diagSize.isValid() )
{
diagramWidth = diagSize.width();
diagramHeight = diagSize.height();
}
}
// feature to the layer
bool alwaysShow = mSettings.showAllDiagrams();
int ddColX = mSettings.xPosColumn;
int ddColY = mSettings.yPosColumn;
double ddPosX = 0.0;
double ddPosY = 0.0;
bool ddPos = ( ddColX >= 0 && ddColY >= 0 );
if ( ddPos && ! feat.attribute( ddColX ).isNull() && ! feat.attribute( ddColY ).isNull() )
{
bool posXOk, posYOk;
ddPosX = feat.attribute( ddColX ).toDouble( &posXOk );
ddPosY = feat.attribute( ddColY ).toDouble( &posYOk );
if ( !posXOk || !posYOk )
{
ddPos = false;
}
else
{
QgsCoordinateTransform ct = mSettings.coordinateTransform();
if ( ct.isValid() && !ct.isShortCircuited() )
{
double z = 0;
ct.transformInPlace( ddPosX, ddPosY, z );
}
//data defined diagram position is always centered
ddPosX -= diagramWidth / 2.0;
ddPosY -= diagramHeight / 2.0;
}
}
else
ddPos = false;
int ddColShow = mSettings.showColumn;
if ( ddColShow >= 0 && ! feat.attribute( ddColShow ).isNull() )
{
bool showOk;
bool ddShow = feat.attribute( ddColShow ).toDouble( &showOk );
if ( showOk && ! ddShow )
return nullptr;
}
QgsDiagramLabelFeature* lf = new QgsDiagramLabelFeature( feat.id(), geomCopy, QSizeF( diagramWidth, diagramHeight ) );
lf->setHasFixedPosition( ddPos );
lf->setFixedPosition( QgsPoint( ddPosX, ddPosY ) );
lf->setHasFixedAngle( true );
lf->setFixedAngle( 0 );
lf->setAlwaysShow( alwaysShow );
lf->setIsObstacle( mSettings.isObstacle() );
lf->setZIndex( mSettings.getZIndex() );
if ( geosObstacleGeomClone )
{
lf->setObstacleGeometry( geosObstacleGeomClone );
}
if ( dr )
{
//append the diagram attributes to lbl
lf->setAttributes( feat.attributes() );
}
QgsPoint ptZero = mapSettings.mapToPixel().toMapCoordinates( 0, 0 );
QgsPoint ptOne = mapSettings.mapToPixel().toMapCoordinates( 1, 0 );
lf->setDistLabel( ptOne.distance( ptZero ) * mSettings.distance() );
return lf;
}
QgsLabelFeature *QgsVectorLayerDiagramProvider::registerDiagram( QgsFeature &feat, QgsRenderContext &context, const QgsGeometry &obstacleGeometry )
{
const QgsMapSettings &mapSettings = mEngine->mapSettings();
const QgsDiagramRenderer *dr = mSettings.renderer();
if ( dr )
{
QList<QgsDiagramSettings> settingList = dr->diagramSettings();
if ( !settingList.isEmpty() && settingList.at( 0 ).scaleBasedVisibility )
{
double maxScale = settingList.at( 0 ).maximumScale;
if ( maxScale > 0 && context.rendererScale() < maxScale )
{
return nullptr;
}
double minScale = settingList.at( 0 ).minimumScale;
if ( minScale > 0 && context.rendererScale() > minScale )
{
return nullptr;
}
}
}
// data defined show diagram? check this before doing any other processing
if ( !mSettings.dataDefinedProperties().valueAsBool( QgsDiagramLayerSettings::Show, context.expressionContext(), true ) )
return nullptr;
// data defined obstacle?
bool isObstacle = mSettings.dataDefinedProperties().valueAsBool( QgsDiagramLayerSettings::IsObstacle, context.expressionContext(), mSettings.isObstacle() );
//convert geom to geos
QgsGeometry geom = feat.geometry();
QgsGeometry extentGeom = QgsGeometry::fromRect( mapSettings.visibleExtent() );
if ( !qgsDoubleNear( mapSettings.rotation(), 0.0 ) )
{
//PAL features are prerotated, so extent also needs to be unrotated
extentGeom.rotate( -mapSettings.rotation(), mapSettings.visibleExtent().center() );
}
geos::unique_ptr geomCopy;
std::unique_ptr<QgsGeometry> scopedPreparedGeom;
if ( QgsPalLabeling::geometryRequiresPreparation( geom, context, mSettings.coordinateTransform(), extentGeom ) )
{
scopedPreparedGeom.reset( new QgsGeometry( QgsPalLabeling::prepareGeometry( geom, context, mSettings.coordinateTransform(), extentGeom ) ) );
QgsGeometry *preparedGeom = scopedPreparedGeom.get();
if ( preparedGeom->isNull() )
return nullptr;
geomCopy = QgsGeos::asGeos( *preparedGeom );
}
else
{
geomCopy = QgsGeos::asGeos( geom );
}
if ( !geomCopy )
return nullptr; // invalid geometry
geos::unique_ptr geosObstacleGeomClone;
std::unique_ptr<QgsGeometry> scopedObstacleGeom;
if ( isObstacle && obstacleGeometry && QgsPalLabeling::geometryRequiresPreparation( obstacleGeometry, context, mSettings.coordinateTransform(), extentGeom ) )
{
QgsGeometry preparedObstacleGeom = QgsPalLabeling::prepareGeometry( obstacleGeometry, context, mSettings.coordinateTransform(), extentGeom );
geosObstacleGeomClone = QgsGeos::asGeos( preparedObstacleGeom );
}
else if ( mSettings.isObstacle() && !obstacleGeometry.isNull() )
{
geosObstacleGeomClone = QgsGeos::asGeos( obstacleGeometry );
}
double diagramWidth = 0;
double diagramHeight = 0;
if ( dr )
{
QSizeF diagSize = dr->sizeMapUnits( feat, context );
if ( diagSize.isValid() )
{
diagramWidth = diagSize.width();
diagramHeight = diagSize.height();
}
}
// feature to the layer
bool alwaysShow = mSettings.showAllDiagrams();
context.expressionContext().setOriginalValueVariable( alwaysShow );
alwaysShow = mSettings.dataDefinedProperties().valueAsBool( QgsDiagramLayerSettings::AlwaysShow, context.expressionContext(), alwaysShow );
// new style data defined position
bool ddPos = false;
double ddPosX = 0.0;
double ddPosY = 0.0;
if ( mSettings.dataDefinedProperties().hasProperty( QgsDiagramLayerSettings::PositionX )
&& mSettings.dataDefinedProperties().property( QgsDiagramLayerSettings::PositionX ).isActive()
&& mSettings.dataDefinedProperties().hasProperty( QgsDiagramLayerSettings::PositionY )
&& mSettings.dataDefinedProperties().property( QgsDiagramLayerSettings::PositionY ).isActive() )
{
ddPosX = mSettings.dataDefinedProperties().valueAsDouble( QgsDiagramLayerSettings::PositionX, context.expressionContext(), std::numeric_limits<double>::quiet_NaN() );
ddPosY = mSettings.dataDefinedProperties().valueAsDouble( QgsDiagramLayerSettings::PositionY, context.expressionContext(), std::numeric_limits<double>::quiet_NaN() );
ddPos = !std::isnan( ddPosX ) && !std::isnan( ddPosY );
if ( ddPos )
{
QgsCoordinateTransform ct = mSettings.coordinateTransform();
if ( ct.isValid() && !ct.isShortCircuited() )
{
double z = 0;
ct.transformInPlace( ddPosX, ddPosY, z );
}
//data defined diagram position is always centered
ddPosX -= diagramWidth / 2.0;
ddPosY -= diagramHeight / 2.0;
}
}
QgsDiagramLabelFeature *lf = new QgsDiagramLabelFeature( feat.id(), std::move( geomCopy ), QSizeF( diagramWidth, diagramHeight ) );
lf->setHasFixedPosition( ddPos );
lf->setFixedPosition( QgsPointXY( ddPosX, ddPosY ) );
lf->setHasFixedAngle( true );
lf->setFixedAngle( 0 );
lf->setAlwaysShow( alwaysShow );
lf->setIsObstacle( isObstacle );
if ( geosObstacleGeomClone )
{
lf->setObstacleGeometry( std::move( geosObstacleGeomClone ) );
}
if ( dr )
{
//append the diagram attributes to lbl
lf->setAttributes( feat.attributes() );
}
// data defined priority?
if ( mSettings.dataDefinedProperties().hasProperty( QgsDiagramLayerSettings::Priority )
&& mSettings.dataDefinedProperties().property( QgsDiagramLayerSettings::Priority ).isActive() )
{
context.expressionContext().setOriginalValueVariable( mSettings.priority() );
double priorityD = mSettings.dataDefinedProperties().valueAsDouble( QgsDiagramLayerSettings::Priority, context.expressionContext(), mSettings.priority() );
priorityD = qBound( 0.0, priorityD, 10.0 );
priorityD = 1 - priorityD / 10.0; // convert 0..10 --> 1..0
lf->setPriority( priorityD );
}
// z-Index
double zIndex = mSettings.zIndex();
if ( mSettings.dataDefinedProperties().hasProperty( QgsDiagramLayerSettings::ZIndex )
&& mSettings.dataDefinedProperties().property( QgsDiagramLayerSettings::ZIndex ).isActive() )
{
context.expressionContext().setOriginalValueVariable( zIndex );
zIndex = mSettings.dataDefinedProperties().valueAsDouble( QgsDiagramLayerSettings::ZIndex, context.expressionContext(), zIndex );
}
lf->setZIndex( zIndex );
// label distance
QgsPointXY ptZero = mapSettings.mapToPixel().toMapCoordinates( 0, 0 );
QgsPointXY ptOne = mapSettings.mapToPixel().toMapCoordinates( 1, 0 );
double dist = mSettings.distance();
if ( mSettings.dataDefinedProperties().hasProperty( QgsDiagramLayerSettings::Distance )
&& mSettings.dataDefinedProperties().property( QgsDiagramLayerSettings::Distance ).isActive() )
{
context.expressionContext().setOriginalValueVariable( dist );
dist = mSettings.dataDefinedProperties().valueAsDouble( QgsDiagramLayerSettings::Distance, context.expressionContext(), dist );
}
dist *= ptOne.distance( ptZero );
lf->setDistLabel( dist );
return lf;
}
