void QgsMarkerSymbolLayerV2::markerOffset( const QgsSymbolV2RenderContext& context, double width, double height,
QgsSymbolV2::OutputUnit widthUnit, QgsSymbolV2::OutputUnit heightUnit,
double& offsetX, double& offsetY ) const
{
offsetX = mOffset.x();
offsetY = mOffset.y();
QgsExpression* offsetExpression = expression( "offset" );
if ( offsetExpression )
{
QPointF offset = QgsSymbolLayerV2Utils::decodePoint( offsetExpression->evaluate( const_cast<QgsFeature*>( context.feature() ) ).toString() );
offsetX = offset.x();
offsetY = offset.y();
}
offsetX *= QgsSymbolLayerV2Utils::lineWidthScaleFactor( context.renderContext(), mOffsetUnit );
offsetY *= QgsSymbolLayerV2Utils::lineWidthScaleFactor( context.renderContext(), mOffsetUnit );
HorizontalAnchorPoint horizontalAnchorPoint = mHorizontalAnchorPoint;
VerticalAnchorPoint verticalAnchorPoint = mVerticalAnchorPoint;
QgsExpression* horizontalAnchorExpression = expression( "horizontal_anchor_point" );
if ( horizontalAnchorExpression )
{
horizontalAnchorPoint = decodeHorizontalAnchorPoint( horizontalAnchorExpression->evaluate( const_cast<QgsFeature*>( context.feature() ) ).toString() );
}
QgsExpression* verticalAnchorExpression = expression( "vertical_anchor_point" );
if ( verticalAnchorExpression )
{
verticalAnchorPoint = decodeVerticalAnchorPoint( verticalAnchorExpression->evaluate( const_cast<QgsFeature*>( context.feature() ) ).toString() );
}
//correct horizontal position according to anchor point
if ( horizontalAnchorPoint == HCenter && verticalAnchorPoint == VCenter )
{
return;
}
double anchorPointCorrectionX = width * QgsSymbolLayerV2Utils::lineWidthScaleFactor( context.renderContext(), widthUnit ) / 2.0;
double anchorPointCorrectionY = height * QgsSymbolLayerV2Utils::lineWidthScaleFactor( context.renderContext(), heightUnit ) / 2.0;
if ( horizontalAnchorPoint == Left )
{
offsetX += anchorPointCorrectionX;
}
else if ( horizontalAnchorPoint == Right )
{
offsetX -= anchorPointCorrectionX;
}
//correct vertical position according to anchor point
if ( verticalAnchorPoint == Top )
{
offsetY += anchorPointCorrectionY;
}
else if ( verticalAnchorPoint == Bottom )
{
offsetY -= anchorPointCorrectionY;
}
}
void QgsMarkerSymbolLayerV2::markerOffset( QgsSymbolV2RenderContext& context, double width, double height,
QgsUnitTypes::RenderUnit widthUnit, QgsUnitTypes::RenderUnit heightUnit,
double& offsetX, double& offsetY, const QgsMapUnitScale& widthMapUnitScale, const QgsMapUnitScale& heightMapUnitScale ) const
{
offsetX = mOffset.x();
offsetY = mOffset.y();
if ( hasDataDefinedProperty( QgsSymbolLayerV2::EXPR_OFFSET ) )
{
context.setOriginalValueVariable( QgsSymbolLayerV2Utils::encodePoint( mOffset ) );
QPointF offset = QgsSymbolLayerV2Utils::decodePoint( evaluateDataDefinedProperty( QgsSymbolLayerV2::EXPR_OFFSET, context ).toString() );
offsetX = offset.x();
offsetY = offset.y();
}
offsetX = QgsSymbolLayerV2Utils::convertToPainterUnits( context.renderContext(), offsetX, mOffsetUnit, mOffsetMapUnitScale );
offsetY = QgsSymbolLayerV2Utils::convertToPainterUnits( context.renderContext(), offsetY, mOffsetUnit, mOffsetMapUnitScale );
HorizontalAnchorPoint horizontalAnchorPoint = mHorizontalAnchorPoint;
VerticalAnchorPoint verticalAnchorPoint = mVerticalAnchorPoint;
if ( hasDataDefinedProperty( QgsSymbolLayerV2::EXPR_HORIZONTAL_ANCHOR_POINT ) )
{
horizontalAnchorPoint = decodeHorizontalAnchorPoint( evaluateDataDefinedProperty( QgsSymbolLayerV2::EXPR_HORIZONTAL_ANCHOR_POINT , context ).toString() );
}
if ( hasDataDefinedProperty( QgsSymbolLayerV2::EXPR_VERTICAL_ANCHOR_POINT ) )
{
verticalAnchorPoint = decodeVerticalAnchorPoint( evaluateDataDefinedProperty( QgsSymbolLayerV2::EXPR_VERTICAL_ANCHOR_POINT, context ).toString() );
}
//correct horizontal position according to anchor point
if ( horizontalAnchorPoint == HCenter && verticalAnchorPoint == VCenter )
{
return;
}
double anchorPointCorrectionX = QgsSymbolLayerV2Utils::convertToPainterUnits( context.renderContext(), width, widthUnit, widthMapUnitScale ) / 2.0;
double anchorPointCorrectionY = QgsSymbolLayerV2Utils::convertToPainterUnits( context.renderContext(), height, heightUnit, heightMapUnitScale ) / 2.0;
if ( horizontalAnchorPoint == Left )
{
offsetX += anchorPointCorrectionX;
}
else if ( horizontalAnchorPoint == Right )
{
offsetX -= anchorPointCorrectionX;
}
//correct vertical position according to anchor point
if ( verticalAnchorPoint == Top )
{
offsetY += anchorPointCorrectionY;
}
else if ( verticalAnchorPoint == Bottom )
{
offsetY -= anchorPointCorrectionY;
}
}
void QgsMarkerSymbolLayer::markerOffset( QgsSymbolRenderContext &context, double width, double height,
QgsUnitTypes::RenderUnit widthUnit, QgsUnitTypes::RenderUnit heightUnit,
double &offsetX, double &offsetY, const QgsMapUnitScale &widthMapUnitScale, const QgsMapUnitScale &heightMapUnitScale ) const
{
offsetX = mOffset.x();
offsetY = mOffset.y();
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyOffset ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodePoint( mOffset ) );
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyOffset, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
{
QPointF offset = QgsSymbolLayerUtils::decodePoint( exprVal.toString() );
offsetX = offset.x();
offsetY = offset.y();
}
}
offsetX = context.renderContext().convertToPainterUnits( offsetX, mOffsetUnit, mOffsetMapUnitScale );
offsetY = context.renderContext().convertToPainterUnits( offsetY, mOffsetUnit, mOffsetMapUnitScale );
HorizontalAnchorPoint horizontalAnchorPoint = mHorizontalAnchorPoint;
VerticalAnchorPoint verticalAnchorPoint = mVerticalAnchorPoint;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyHorizontalAnchor ) )
{
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyHorizontalAnchor, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
{
horizontalAnchorPoint = decodeHorizontalAnchorPoint( exprVal.toString() );
}
}
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyVerticalAnchor ) )
{
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyVerticalAnchor, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
{
verticalAnchorPoint = decodeVerticalAnchorPoint( exprVal.toString() );
}
}
//correct horizontal position according to anchor point
if ( horizontalAnchorPoint == HCenter && verticalAnchorPoint == VCenter )
{
return;
}
double anchorPointCorrectionX = context.renderContext().convertToPainterUnits( width, widthUnit, widthMapUnitScale ) / 2.0;
double anchorPointCorrectionY = context.renderContext().convertToPainterUnits( height, heightUnit, heightMapUnitScale ) / 2.0;
if ( horizontalAnchorPoint == Left )
{
offsetX += anchorPointCorrectionX;
}
else if ( horizontalAnchorPoint == Right )
{
offsetX -= anchorPointCorrectionX;
}
//correct vertical position according to anchor point
if ( verticalAnchorPoint == Top )
{
offsetY += anchorPointCorrectionY;
}
else if ( verticalAnchorPoint == Bottom )
{
offsetY -= anchorPointCorrectionY;
}
}
