QSizeF QgsRasterSymbolLegendNode::drawSymbol( const QgsLegendSettings &settings, ItemContext *ctx, double itemHeight ) const
{
if ( ctx && ctx->painter )
{
QColor itemColor = mColor;
if ( QgsRasterLayer *rasterLayer = qobject_cast<QgsRasterLayer *>( layerNode()->layer() ) )
{
if ( QgsRasterRenderer *rasterRenderer = rasterLayer->renderer() )
itemColor.setAlpha( rasterRenderer->opacity() * 255.0 );
}
ctx->painter->setBrush( itemColor );
if ( settings.drawRasterStroke() )
{
QPen pen;
pen.setColor( settings.rasterStrokeColor() );
pen.setWidthF( settings.rasterStrokeWidth() );
pen.setJoinStyle( Qt::MiterJoin );
ctx->painter->setPen( pen );
}
else
{
ctx->painter->setPen( Qt::NoPen );
}
ctx->painter->drawRect( QRectF( ctx->point.x(), ctx->point.y() + ( itemHeight - settings.symbolSize().height() ) / 2,
settings.symbolSize().width(), settings.symbolSize().height() ) );
}
return settings.symbolSize();
}
void QgsRasterSymbolLegendNode::exportSymbolToJson( const QgsLegendSettings &settings, const QgsRenderContext &, QJsonObject &json ) const
{
QImage img = QImage( settings.symbolSize().toSize(), QImage::Format_ARGB32 );
img.fill( Qt::transparent );
QPainter painter( &img );
painter.setRenderHint( QPainter::Antialiasing );
QColor itemColor = mColor;
if ( QgsRasterLayer *rasterLayer = qobject_cast<QgsRasterLayer *>( layerNode()->layer() ) )
{
if ( QgsRasterRenderer *rasterRenderer = rasterLayer->renderer() )
itemColor.setAlpha( rasterRenderer->opacity() * 255.0 );
}
painter.setBrush( itemColor );
if ( settings.drawRasterStroke() )
{
QPen pen;
pen.setColor( settings.rasterStrokeColor() );
pen.setWidthF( settings.rasterStrokeWidth() );
pen.setJoinStyle( Qt::MiterJoin );
painter.setPen( pen );
}
else
{
painter.setPen( Qt::NoPen );
}
painter.drawRect( QRectF( 0, 0, settings.symbolSize().width(), settings.symbolSize().height() ) );
QByteArray byteArray;
QBuffer buffer( &byteArray );
img.save( &buffer, "PNG" );
const QString base64 = QString::fromLatin1( byteArray.toBase64().data() );
json[ "icon" ] = base64;
}