bool QgsMapRendererJob::prepareLabelCache() const
{
bool canCache = mCache;
// calculate which layers will be labeled
QSet< QgsMapLayer* > labeledLayers;
Q_FOREACH ( const QgsMapLayer* ml, mSettings.layers() )
{
QgsVectorLayer* vl = const_cast< QgsVectorLayer* >( qobject_cast<const QgsVectorLayer *>( ml ) );
if ( vl && QgsPalLabeling::staticWillUseLayer( vl ) )
labeledLayers << vl;
if ( vl && vl->labeling() && vl->labeling()->requiresAdvancedEffects( vl ) )
{
canCache = false;
break;
}
}
if ( mCache && mCache->hasCacheImage( LABEL_CACHE_ID ) )
{
// we may need to clear label cache and re-register labeled features - check for that here
// can we reuse the cached label solution?
bool canUseCache = canCache && mCache->dependentLayers( LABEL_CACHE_ID ).toSet() == labeledLayers;
if ( !canUseCache )
{
// no - participating layers have changed
mCache->clearCacheImage( LABEL_CACHE_ID );
}
}
return canCache;
}
bool QgsMapToolLabel::createAuxiliaryFields( LabelDetails &details, QgsPalIndexes &indexes ) const
{
bool newAuxiliaryLayer = false;
QgsVectorLayer *vlayer = details.layer;
QString providerId = details.pos.providerID;
if ( !vlayer || !vlayer->labelsEnabled() )
return false;
if ( !vlayer->auxiliaryLayer() )
{
QgsNewAuxiliaryLayerDialog dlg( vlayer );
dlg.exec();
newAuxiliaryLayer = true;
}
if ( !vlayer->auxiliaryLayer() )
return false;
for ( const QgsPalLayerSettings::Property &p : qgis::as_const( mPalProperties ) )
{
int index = -1;
// always use the default activated property
QgsProperty prop = details.settings.dataDefinedProperties().property( p );
if ( prop.propertyType() == QgsProperty::FieldBasedProperty && prop.isActive() )
{
index = vlayer->fields().lookupField( prop.field() );
}
else
{
index = QgsAuxiliaryLayer::createProperty( p, vlayer );
}
indexes[p] = index;
}
details.settings = vlayer->labeling()->settings( providerId );
return newAuxiliaryLayer;
}
void QgsLabelPropertyDialog::init( const QString& layerId, const QString& providerId, int featureId, const QString& labelText )
{
//get feature attributes
QgsVectorLayer* vlayer = dynamic_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer( layerId ) );
if ( !vlayer )
{
return;
}
if ( !vlayer->labeling() )
{
return;
}
if ( !vlayer->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setFlags( QgsFeatureRequest::NoGeometry ) ).nextFeature( mCurLabelFeat ) )
{
return;
}
QgsAttributes attributeValues = mCurLabelFeat.attributes();
//get layerproperties. Problem: only for pallabeling...
blockElementSignals( true );
QgsPalLayerSettings layerSettings = vlayer->labeling()->settings( vlayer, providerId );
//get label field and fill line edit
if ( layerSettings.isExpression && !labelText.isNull() )
{
mLabelTextLineEdit->setText( labelText );
mLabelTextLineEdit->setEnabled( false );
mLabelTextLabel->setText( tr( "Expression result" ) );
}
else
{
QString labelFieldName = vlayer->customProperty( "labeling/fieldName" ).toString();
if ( !labelFieldName.isEmpty() )
{
mCurLabelField = vlayer->fieldNameIndex( labelFieldName );
if ( mCurLabelField >= 0 )
{
mLabelTextLineEdit->setText( attributeValues.at( mCurLabelField ).toString() );
const QgsFields& layerFields = vlayer->fields();
switch ( layerFields.at( mCurLabelField ).type() )
{
case QVariant::Double:
mLabelTextLineEdit->setValidator( new QDoubleValidator( this ) );
break;
case QVariant::Int:
case QVariant::UInt:
case QVariant::LongLong:
mLabelTextLineEdit->setValidator( new QIntValidator( this ) );
break;
default:
break;
}
}
else
{
mLabelTextLineEdit->setEnabled( false );
}
}
}
//get attributes of the feature and fill data defined values
// font is set directly from QgsLabelPosition
updateFont( mLabelFont, false );
//set all the gui elements to the default layer-level values
mLabelDistanceSpinBox->clear();
mLabelDistanceSpinBox->setSpecialValueText( tr( "Layer default (%1)" ).arg( QString::number( layerSettings.dist, 'f', mLabelDistanceSpinBox->decimals() ) ) );
mBufferSizeSpinBox->clear();
mBufferSizeSpinBox->setSpecialValueText( tr( "Layer default (%1)" ).arg( QString::number( layerSettings.bufferSize, 'f', mBufferSizeSpinBox->decimals() ) ) );
mRotationSpinBox->clear();
mXCoordSpinBox->clear();
mYCoordSpinBox->clear();
mShowLabelChkbx->setChecked( true );
mFontColorButton->setColor( layerSettings.textColor );
mBufferColorButton->setColor( layerSettings.bufferColor );
mMinScaleSpinBox->setValue( layerSettings.scaleMin );
mMaxScaleSpinBox->setValue( layerSettings.scaleMax );
mHaliComboBox->setCurrentIndex( mHaliComboBox->findData( "Left" ) );
mValiComboBox->setCurrentIndex( mValiComboBox->findData( "Bottom" ) );
mFontColorButton->setColorDialogTitle( tr( "Font color" ) );
mBufferColorButton->setColorDialogTitle( tr( "Buffer color" ) );
disableGuiElements();
QMap< QgsPalLayerSettings::DataDefinedProperties, QgsDataDefined* >::const_iterator it = layerSettings.dataDefinedProperties.constBegin();
for ( ; it != layerSettings.dataDefinedProperties.constEnd(); ++it )
{
mDataDefinedProperties.insert( it.key(), it.value() ? new QgsDataDefined( *it.value() ) : nullptr );
}
//set widget values from data defined results
setDataDefinedValues( layerSettings, vlayer );
//enable widgets connected to data defined fields
enableDataDefinedWidgets( vlayer );
blockElementSignals( false );
}
void QgsLabelPropertyDialog::init( const QString &layerId, const QString &providerId, int featureId, const QString &labelText )
{
//get feature attributes
QgsVectorLayer *vlayer = QgsProject::instance()->mapLayer<QgsVectorLayer *>( layerId );
if ( !vlayer )
{
return;
}
if ( !vlayer->labeling() )
{
return;
}
if ( !vlayer->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setFlags( QgsFeatureRequest::NoGeometry ) ).nextFeature( mCurLabelFeat ) )
{
return;
}
QgsAttributes attributeValues = mCurLabelFeat.attributes();
//get layerproperties. Problem: only for pallabeling...
blockElementSignals( true );
QgsPalLayerSettings layerSettings = vlayer->labeling()->settings( providerId );
//get label field and fill line edit
if ( layerSettings.isExpression && !labelText.isNull() )
{
mLabelTextLineEdit->setText( labelText );
mLabelTextLineEdit->setEnabled( false );
mLabelTextLabel->setText( tr( "Expression result" ) );
}
else
{
QString labelFieldName = layerSettings.fieldName;
if ( !labelFieldName.isEmpty() )
{
mCurLabelField = vlayer->fields().lookupField( labelFieldName );
if ( mCurLabelField >= 0 )
{
mLabelTextLineEdit->setText( attributeValues.at( mCurLabelField ).toString() );
if ( vlayer->isEditable() )
mLabelTextLineEdit->setEnabled( true );
else
mLabelTextLineEdit->setEnabled( false );
const QgsFields &layerFields = vlayer->fields();
switch ( layerFields.at( mCurLabelField ).type() )
{
case QVariant::Double:
mLabelTextLineEdit->setValidator( new QDoubleValidator( this ) );
break;
case QVariant::Int:
case QVariant::UInt:
case QVariant::LongLong:
mLabelTextLineEdit->setValidator( new QIntValidator( this ) );
break;
default:
break;
}
}
else
{
mLabelTextLineEdit->setEnabled( false );
}
}
}
//get attributes of the feature and fill data defined values
// font is set directly from QgsLabelPosition
updateFont( mLabelFont, false );
QgsTextFormat format = layerSettings.format();
QgsTextBufferSettings buffer = format.buffer();
//set all the gui elements to the default layer-level values
mLabelDistanceSpinBox->clear();
mLabelDistanceSpinBox->setSpecialValueText( tr( "Layer default (%1)" ).arg( QString::number( layerSettings.dist, 'f', mLabelDistanceSpinBox->decimals() ) ) );
mBufferSizeSpinBox->clear();
mBufferSizeSpinBox->setSpecialValueText( tr( "Layer default (%1)" ).arg( QString::number( buffer.size(), 'f', mBufferSizeSpinBox->decimals() ) ) );
mRotationSpinBox->clear();
mXCoordSpinBox->clear();
mYCoordSpinBox->clear();
mShowLabelChkbx->setChecked( true );
mFontColorButton->setColor( format.color() );
mBufferColorButton->setColor( buffer.color() );
mMinScaleWidget->setScale( layerSettings.minimumScale );
mMaxScaleWidget->setScale( layerSettings.maximumScale );
mHaliComboBox->setCurrentIndex( mHaliComboBox->findData( "Left" ) );
mValiComboBox->setCurrentIndex( mValiComboBox->findData( "Bottom" ) );
mFontColorButton->setColorDialogTitle( tr( "Font Color" ) );
mBufferColorButton->setColorDialogTitle( tr( "Buffer Color" ) );
disableGuiElements();
mDataDefinedProperties = layerSettings.dataDefinedProperties();
//set widget values from data defined results
setDataDefinedValues( vlayer );
//enable widgets connected to data defined fields
enableDataDefinedWidgets( vlayer );
blockElementSignals( false );
}