QgsSymbolV2* QgsCategorizedSymbolRendererV2::symbolForFeature( QgsFeature& feature ) { QgsSymbolV2* symbol = originalSymbolForFeature( feature ); if ( !symbol ) return 0; if ( !mRotation.data() && !mSizeScale.data() ) return symbol; // no data-defined rotation/scaling - just return the symbol // find out rotation, size scale const double rotation = mRotation.data() ? mRotation->evaluate( feature ).toDouble() : 0; const double sizeScale = mSizeScale.data() ? mSizeScale->evaluate( feature ).toDouble() : 1.; // take a temporary symbol (or create it if doesn't exist) QgsSymbolV2* tempSymbol = mTempSymbols[symbol]; // modify the temporary symbol and return it if ( tempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( tempSymbol ); if ( mRotation.data() ) markerSymbol->setAngle( rotation ); markerSymbol->setSize( sizeScale * static_cast<QgsMarkerSymbolV2*>( symbol )->size() ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( tempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( tempSymbol ); lineSymbol->setWidth( sizeScale * static_cast<QgsLineSymbolV2*>( symbol )->width() ); } return tempSymbol; }
QgsSymbolV2* QgsSingleSymbolRendererV2::symbolForFeature( QgsFeature& feature, QgsRenderContext &context ) { context.expressionContext().setFeature( feature ); if ( !mRotation.data() && !mSizeScale.data() ) return mSymbol.data(); const double rotation = mRotation.data() ? mRotation->evaluate( &context.expressionContext() ).toDouble() : 0; const double sizeScale = mSizeScale.data() ? mSizeScale->evaluate( &context.expressionContext() ).toDouble() : 1.; if ( mTempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( mTempSymbol.data() ); if ( mRotation.data() ) markerSymbol->setAngle( rotation ); markerSymbol->setSize( sizeScale * mOrigSize ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( mTempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( mTempSymbol.data() ); lineSymbol->setWidth( sizeScale * mOrigSize ); } else if ( mTempSymbol->type() == QgsSymbolV2::Fill ) { QgsFillSymbolV2* fillSymbol = static_cast<QgsFillSymbolV2*>( mTempSymbol.data() ); if ( mRotation.data() ) fillSymbol->setAngle( rotation ); } return mTempSymbol.data(); }
QgsSymbolV2* QgsCategorizedSymbolRendererV2::symbolForFeature( QgsFeature& feature ) { const QgsAttributeMap& attrMap = feature.attributeMap(); QgsAttributeMap::const_iterator ita = attrMap.find( mAttrNum ); if ( ita == attrMap.end() ) { QgsDebugMsg( "attribute '" + mAttrName + "' (index " + QString::number( mAttrNum ) + ") required by renderer not found" ); return NULL; } // find the right symbol for the category QgsSymbolV2* symbol = symbolForValue( *ita ); if ( symbol == NULL ) { // if no symbol found use default one //return symbolForValue( QVariant( "" ) ); // What is default? Empty string may be a legal value, and features not found // should not be rendered using empty string value category symbology. // We also need to get NULL in that case so that willRenderFeature() // may be used to count features. return 0; } if ( mRotationFieldIdx == -1 && mSizeScaleFieldIdx == -1 ) return symbol; // no data-defined rotation/scaling - just return the symbol // find out rotation, size scale double rotation = 0; double sizeScale = 1; if ( mRotationFieldIdx != -1 ) rotation = attrMap[mRotationFieldIdx].toDouble(); if ( mSizeScaleFieldIdx != -1 ) sizeScale = attrMap[mSizeScaleFieldIdx].toDouble(); // take a temporary symbol (or create it if doesn't exist) QgsSymbolV2* tempSymbol = mTempSymbols[ita->toString()]; // modify the temporary symbol and return it if ( tempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( tempSymbol ); if ( mRotationFieldIdx != -1 ) markerSymbol->setAngle( rotation ); if ( mSizeScaleFieldIdx != -1 ) markerSymbol->setSize( sizeScale * static_cast<QgsMarkerSymbolV2*>( symbol )->size() ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( tempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( tempSymbol ); if ( mSizeScaleFieldIdx != -1 ) lineSymbol->setWidth( sizeScale * static_cast<QgsLineSymbolV2*>( symbol )->width() ); } return tempSymbol; }
void QgsSingleSymbolRendererV2Widget::scaleMethodChanged( QgsSymbolV2::ScaleMethod scaleMethod ) { mRenderer->setScaleMethod( scaleMethod ); // Set also on the symbol clone QgsMarkerSymbolV2 *markerSymbol = dynamic_cast<QgsMarkerSymbolV2 *>( mSingleSymbol ); if ( markerSymbol ) { markerSymbol->setScaleMethod( scaleMethod ); } }
QgsSymbolV2* QgsGraduatedSymbolRendererV2::symbolForFeature( QgsFeature& feature ) { const QgsAttributes& attrs = feature.attributes(); if ( mAttrNum < 0 || mAttrNum >= attrs.count() ) { QgsDebugMsg( "attribute required by renderer not found: " + mAttrName + "(index " + QString::number( mAttrNum ) + ")" ); return NULL; } // Null values should not be categorized if ( attrs[mAttrNum].isNull() ) return NULL; // find the right category QgsSymbolV2* symbol = symbolForValue( attrs[mAttrNum].toDouble() ); if ( symbol == NULL ) return NULL; if ( mRotationFieldIdx == -1 && mSizeScaleFieldIdx == -1 ) return symbol; // no data-defined rotation/scaling - just return the symbol // find out rotation, size scale double rotation = 0; double sizeScale = 1; if ( mRotationFieldIdx != -1 ) rotation = attrs[mRotationFieldIdx].toDouble(); if ( mSizeScaleFieldIdx != -1 ) sizeScale = attrs[mSizeScaleFieldIdx].toDouble(); // take a temporary symbol (or create it if doesn't exist) QgsSymbolV2* tempSymbol = mTempSymbols[symbol]; // modify the temporary symbol and return it if ( tempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( tempSymbol ); if ( mRotationFieldIdx != -1 ) markerSymbol->setAngle( rotation ); if ( mSizeScaleFieldIdx != -1 ) markerSymbol->setSize( sizeScale * static_cast<QgsMarkerSymbolV2*>( symbol )->size() ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( tempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( tempSymbol ); if ( mSizeScaleFieldIdx != -1 ) lineSymbol->setWidth( sizeScale * static_cast<QgsLineSymbolV2*>( symbol )->width() ); } return tempSymbol; }
void QgsFeatureRendererV2::setScaleMethodToSymbol( QgsSymbolV2* symbol, int scaleMethod ) { if ( symbol ) { if ( symbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* ms = static_cast<QgsMarkerSymbolV2*>( symbol ); if ( ms ) { ms->setScaleMethod( static_cast< QgsSymbolV2::ScaleMethod >( scaleMethod ) ); } } } }
QgsSymbolV2* QgsCategorizedSymbolRendererV2::symbolForFeature( QgsFeature& feature ) { const QgsAttributes& attrs = feature.attributes(); QVariant value; if ( mAttrNum == -1 ) { Q_ASSERT( mExpression.data() ); value = mExpression->evaluate( &feature ); } else { value = attrs[mAttrNum]; } // find the right symbol for the category QgsSymbolV2* symbol = symbolForValue( value ); if ( symbol == NULL ) { // if no symbol found use default one return symbolForValue( QVariant( "" ) ); } if ( !mRotation.data() && !mSizeScale.data() ) return symbol; // no data-defined rotation/scaling - just return the symbol // find out rotation, size scale const double rotation = mRotation.data() ? mRotation->evaluate( feature ).toDouble() : 0; const double sizeScale = mSizeScale.data() ? mSizeScale->evaluate( feature ).toDouble() : 1.; // take a temporary symbol (or create it if doesn't exist) QgsSymbolV2* tempSymbol = mTempSymbols[value.toString()]; // modify the temporary symbol and return it if ( tempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( tempSymbol ); if ( mRotation.data() ) markerSymbol->setAngle( rotation ); markerSymbol->setSize( sizeScale * static_cast<QgsMarkerSymbolV2*>( symbol )->size() ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( tempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( tempSymbol ); lineSymbol->setWidth( sizeScale * static_cast<QgsLineSymbolV2*>( symbol )->width() ); } return tempSymbol; }
QgsSymbolV2* QgsGraduatedSymbolRendererV2::symbolForFeature( QgsFeature& feature ) { const QgsAttributes& attrs = feature.attributes(); QVariant value; if ( mAttrNum < 0 || mAttrNum >= attrs.count() ) { value = mExpression->evaluate( &feature ); } else { value = attrs[mAttrNum]; } // Null values should not be categorized if ( value.isNull() ) return NULL; // find the right category QgsSymbolV2* symbol = symbolForValue( value.toDouble() ); if ( symbol == NULL ) return NULL; if ( !mRotation.data() && !mSizeScale.data() ) return symbol; // no data-defined rotation/scaling - just return the symbol // find out rotation, size scale const double rotation = mRotation.data() ? mRotation->evaluate( feature ).toDouble() : 0; const double sizeScale = mSizeScale.data() ? mSizeScale->evaluate( feature ).toDouble() : 1.; // take a temporary symbol (or create it if doesn't exist) QgsSymbolV2* tempSymbol = mTempSymbols[symbol]; // modify the temporary symbol and return it if ( tempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( tempSymbol ); if ( mRotation.data() ) markerSymbol->setAngle( rotation ); markerSymbol->setSize( sizeScale * static_cast<QgsMarkerSymbolV2*>( symbol )->size() ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( tempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( tempSymbol ); lineSymbol->setWidth( sizeScale * static_cast<QgsLineSymbolV2*>( symbol )->width() ); } return tempSymbol; }
QgsSymbolV2* QgsSingleSymbolRendererV2::symbolForFeature( QgsFeature& feature ) { if ( mRotationFieldIdx == -1 && mSizeScaleFieldIdx == -1 ) return mSymbol; double rotation = 0; double sizeScale = 1; if ( mRotationFieldIdx != -1 ) { rotation = feature.attributeMap()[mRotationFieldIdx].toDouble(); } if ( mSizeScaleFieldIdx != -1 ) { sizeScale = feature.attributeMap()[mSizeScaleFieldIdx].toDouble(); } if ( mTempSymbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2* markerSymbol = static_cast<QgsMarkerSymbolV2*>( mTempSymbol ); if ( mRotationFieldIdx != -1 ) markerSymbol->setAngle( rotation ); if ( mSizeScaleFieldIdx != -1 ) markerSymbol->setSize( sizeScale * mOrigSize ); markerSymbol->setScaleMethod( mScaleMethod ); } else if ( mTempSymbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2* lineSymbol = static_cast<QgsLineSymbolV2*>( mTempSymbol ); if ( mSizeScaleFieldIdx != -1 ) lineSymbol->setWidth( sizeScale * mOrigSize ); } else if ( mTempSymbol->type() == QgsSymbolV2::Fill ) { QgsFillSymbolV2* fillSymbol = static_cast<QgsFillSymbolV2*>( mTempSymbol ); if ( mRotationFieldIdx != -1 ) fillSymbol->setAngle( rotation ); } return mTempSymbol; }
void QgsFeatureRendererV2::convertSymbolSizeScale( QgsSymbolV2 * symbol, QgsSymbolV2::ScaleMethod method, const QString & field ) { if ( symbol->type() == QgsSymbolV2::Marker ) { QgsMarkerSymbolV2 * s = static_cast<QgsMarkerSymbolV2 *>( symbol ); if ( QgsSymbolV2::ScaleArea == QgsSymbolV2::ScaleMethod( method ) ) { const QgsDataDefined dd( "coalesce(sqrt(" + QString::number( s->size() ) + " * (" + field + ")),0)" ); s->setDataDefinedSize( dd ); } else { const QgsDataDefined dd( "coalesce(" + QString::number( s->size() ) + " * (" + field + "),0)" ); s->setDataDefinedSize( dd ); } s->setScaleMethod( QgsSymbolV2::ScaleDiameter ); } else if ( symbol->type() == QgsSymbolV2::Line ) { QgsLineSymbolV2 * s = static_cast<QgsLineSymbolV2 *>( symbol ); const QgsDataDefined dd( "coalesce(" + QString::number( s->width() ) + " * (" + field + "),0)" ); s->setDataDefinedWidth( dd ); } }