QgsLayerTreeModelLegendNode::ItemMetrics QgsDataDefinedSizeLegendNode::draw( const QgsLegendSettings &settings, QgsLayerTreeModelLegendNode::ItemContext *ctx )
{
// setup temporary render context
QgsRenderContext context;
context.setScaleFactor( settings.dpi() / 25.4 );
context.setRendererScale( settings.mapScale() );
context.setMapToPixel( QgsMapToPixel( 1 / ( settings.mmPerMapUnit() * context.scaleFactor() ) ) );
context.setForceVectorOutput( true );
if ( ctx && ctx->painter )
{
context.setPainter( ctx->painter );
ctx->painter->save();
ctx->painter->setRenderHint( QPainter::Antialiasing );
ctx->painter->translate( ctx->point );
ctx->painter->scale( 1 / context.scaleFactor(), 1 / context.scaleFactor() );
}
QgsDataDefinedSizeLegend ddsLegend( *mSettings );
ddsLegend.setFont( settings.style( QgsLegendStyle::SymbolLabel ).font() );
ddsLegend.setTextColor( settings.fontColor() );
QSize contentSize;
int labelXOffset;
ddsLegend.drawCollapsedLegend( context, &contentSize, &labelXOffset );
if ( ctx && ctx->painter )
ctx->painter->restore();
ItemMetrics im;
im.symbolSize = QSizeF( ( contentSize.width() - labelXOffset ) / context.scaleFactor(), contentSize.height() / context.scaleFactor() );
im.labelSize = QSizeF( labelXOffset / context.scaleFactor(), contentSize.height() / context.scaleFactor() );
return im;
}
static void _setStandardTestFont( QgsLegendSettings& settings, const QString& style = "Roman" )
{
QList< QgsComposerLegendStyle::Style> styles;
styles << QgsComposerLegendStyle::Title
<< QgsComposerLegendStyle::Group
<< QgsComposerLegendStyle::Subgroup
<< QgsComposerLegendStyle::SymbolLabel;
Q_FOREACH ( QgsComposerLegendStyle::Style st, styles )
{
QFont font( QgsFontUtils::getStandardTestFont( style ) );
font.setPointSizeF( settings.style( st ).font().pointSizeF() );
settings.rstyle( st ).setFont( font );
}
static void _setStandardTestFont( QgsLegendSettings& settings )
{
QList< QgsComposerLegendStyle::Style> styles;
styles << QgsComposerLegendStyle::Title
<< QgsComposerLegendStyle::Group
<< QgsComposerLegendStyle::Subgroup
<< QgsComposerLegendStyle::SymbolLabel;
foreach ( QgsComposerLegendStyle::Style st, styles )
{
QFont font( QgsFontUtils::getStandardTestFont() );
font.setPointSizeF( settings.style( st ).font().pointSizeF() );
settings.rstyle( st ).setFont( font );
}
QgsLayerTreeModelLegendNode::ItemMetrics QgsLayerTreeModelLegendNode::draw( const QgsLegendSettings& settings, ItemContext* ctx )
{
QFont symbolLabelFont = settings.style( QgsComposerLegendStyle::SymbolLabel ).font();
double textHeight = settings.fontHeightCharacterMM( symbolLabelFont, QChar( '0' ) );
// itemHeight here is not realy item height, it is only for symbol
// vertical alignment purpose, i.e. ok take single line height
// if there are more lines, thos run under the symbol
double itemHeight = qMax(( double ) settings.symbolSize().height(), textHeight );
ItemMetrics im;
im.symbolSize = drawSymbol( settings, ctx, itemHeight );
im.labelSize = drawSymbolText( settings, ctx, im.symbolSize );
return im;
}
QSizeF QgsLayerTreeModelLegendNode::drawSymbolText( const QgsLegendSettings &settings, ItemContext *ctx, QSizeF symbolSize ) const
{
QSizeF labelSize( 0, 0 );
QFont symbolLabelFont = settings.style( QgsLegendStyle::SymbolLabel ).font();
double textHeight = settings.fontHeightCharacterMM( symbolLabelFont, QChar( '0' ) );
double textDescent = settings.fontDescentMillimeters( symbolLabelFont );
QgsExpressionContext tempContext;
const QStringList lines = settings.evaluateItemText( data( Qt::DisplayRole ).toString(), ctx && ctx->context ? ctx->context->expressionContext() : tempContext );
labelSize.rheight() = lines.count() * textHeight + ( lines.count() - 1 ) * ( settings.lineSpacing() + textDescent );
double labelX = 0.0, labelY = 0.0;
if ( ctx && ctx->painter )
{
ctx->painter->setPen( settings.fontColor() );
labelX = ctx->point.x() + std::max( static_cast< double >( symbolSize.width() ), ctx->labelXOffset );
labelY = ctx->point.y();
// Vertical alignment of label with symbol
if ( labelSize.height() < symbolSize.height() )
labelY += symbolSize.height() / 2 - labelSize.height() / 2; // label centered with symbol
labelY += textHeight;
}
for ( QStringList::ConstIterator itemPart = lines.constBegin(); itemPart != lines.constEnd(); ++itemPart )
{
labelSize.rwidth() = std::max( settings.textWidthMillimeters( symbolLabelFont, *itemPart ), double( labelSize.width() ) );
if ( ctx && ctx->painter )
{
settings.drawText( ctx->painter, labelX, labelY, *itemPart, symbolLabelFont );
if ( itemPart != ( lines.end() - 1 ) )
labelY += textDescent + settings.lineSpacing() + textHeight;
}
}
return labelSize;
}
QSizeF QgsLayerTreeModelLegendNode::drawSymbolText( const QgsLegendSettings& settings, ItemContext* ctx, const QSizeF& symbolSize ) const
{
QSizeF labelSize( 0, 0 );
QFont symbolLabelFont = settings.style( QgsComposerLegendStyle::SymbolLabel ).font();
double textHeight = settings.fontHeightCharacterMM( symbolLabelFont, QChar( '0' ) );
QStringList lines = settings.splitStringForWrapping( data( Qt::DisplayRole ).toString() );
labelSize.rheight() = lines.count() * textHeight + ( lines.count() - 1 ) * settings.lineSpacing();
double labelX = 0.0, labelY = 0.0;
if ( ctx )
{
ctx->painter->setPen( settings.fontColor() );
labelX = ctx->point.x() + qMax(( double ) symbolSize.width(), ctx->labelXOffset );
labelY = ctx->point.y();
// Vertical alignment of label with symbol
if ( labelSize.height() < symbolSize.height() )
labelY += symbolSize.height() / 2 + textHeight / 2; // label centered with symbol
else
labelY += textHeight; // label starts at top and runs under symbol
}
for ( QStringList::Iterator itemPart = lines.begin(); itemPart != lines.end(); ++itemPart )
{
labelSize.rwidth() = qMax( settings.textWidthMillimeters( symbolLabelFont, *itemPart ), double( labelSize.width() ) );
if ( ctx )
{
settings.drawText( ctx->painter, labelX, labelY, *itemPart, symbolLabelFont );
if ( itemPart != lines.end() )
labelY += settings.lineSpacing() + textHeight;
}
}
return labelSize;
}
