QSize QgsSymbolV2LegendNode::minimumIconSize() const
{
QSize minSz( 16, 16 );
if ( mItem.symbol() && mItem.symbol()->type() == QgsSymbolV2::Marker )
{
QScopedPointer<QgsRenderContext> context( createTemporaryRenderContext() );
minSz = QgsImageOperation::nonTransparentImageRect(
QgsSymbolLayerV2Utils::symbolPreviewPixmap( mItem.symbol(), QSize( 512, 512 ),
context.data() ).toImage(),
minSz,
true ).size();
}
else if ( mItem.symbol() && mItem.symbol()->type() == QgsSymbolV2::Line )
{
QScopedPointer<QgsRenderContext> context( createTemporaryRenderContext() );
minSz = QgsImageOperation::nonTransparentImageRect(
QgsSymbolLayerV2Utils::symbolPreviewPixmap( mItem.symbol(), QSize( minSz.width(), 512 ),
context.data() ).toImage(),
minSz,
true ).size();
}
if ( mItem.level() != 0 && !( model() && model()->testFlag( QgsLayerTreeModel::ShowLegendAsTree ) ) )
minSz.setWidth( mItem.level() * indentSize + minSz.width() );
return minSz;
}
void QgsDataDefinedSizeLegendNode::cacheImage() const
{
if ( mImage.isNull() )
{
std::unique_ptr<QgsRenderContext> context( createTemporaryRenderContext() );
if ( !context )
{
context.reset( new QgsRenderContext );
context->setScaleFactor( 96 / 25.4 );
}
mImage = mSettings->collapsedLegendImage( *context );
}
}
QVariant QgsSymbolV2LegendNode::data( int role ) const
{
if ( role == Qt::DisplayRole )
{
return mLabel;
}
else if ( role == Qt::EditRole )
{
return mUserLabel.isEmpty() ? mItem.label() : mUserLabel;
}
else if ( role == Qt::DecorationRole )
{
if ( mPixmap.isNull() || mPixmap.size() != mIconSize )
{
QPixmap pix;
if ( mItem.symbol() )
{
QScopedPointer<QgsRenderContext> context( createTemporaryRenderContext() );
pix = QgsSymbolLayerV2Utils::symbolPreviewPixmap( mItem.symbol(), mIconSize, context.data() );
}
else
{
pix = QPixmap( mIconSize );
pix.fill( Qt::transparent );
}
if ( mItem.level() == 0 || ( model() && model()->testFlag( QgsLayerTreeModel::ShowLegendAsTree ) ) )
mPixmap = pix;
else
{
// ident the symbol icon to make it look like a tree structure
QPixmap pix2( pix.width() + mItem.level() * indentSize, pix.height() );
pix2.fill( Qt::transparent );
QPainter p( &pix2 );
p.drawPixmap( mItem.level() * indentSize, 0, pix );
p.end();
mPixmap = pix2;
}
}
return mPixmap;
}
else if ( role == Qt::CheckStateRole )
{
if ( !mItem.isCheckable() )
return QVariant();
QgsVectorLayer* vlayer = qobject_cast<QgsVectorLayer*>( mLayerNode->layer() );
if ( !vlayer || !vlayer->rendererV2() )
return QVariant();
return vlayer->rendererV2()->legendSymbolItemChecked( mItem.ruleKey() ) ? Qt::Checked : Qt::Unchecked;
}
else if ( role == RuleKeyRole )
{
return mItem.ruleKey();
}
else if ( role == SymbolV2LegacyRuleKeyRole )
{
return QVariant::fromValue<void*>( mItem.legacyRuleKey() );
}
else if ( role == ParentRuleKeyRole )
{
return mItem.parentRuleKey();
}
return QVariant();
}
QVariant QgsSymbolLegendNode::data( int role ) const
{
if ( role == Qt::DisplayRole )
{
return mLabel;
}
else if ( role == Qt::EditRole )
{
return mUserLabel.isEmpty() ? mItem.label() : mUserLabel;
}
else if ( role == Qt::DecorationRole )
{
if ( mPixmap.isNull() || mPixmap.size() != mIconSize )
{
QPixmap pix;
if ( mItem.symbol() )
{
std::unique_ptr<QgsRenderContext> context( createTemporaryRenderContext() );
pix = QgsSymbolLayerUtils::symbolPreviewPixmap( mItem.symbol(), mIconSize, 0, context.get() );
if ( !mTextOnSymbolLabel.isEmpty() && context )
{
QPainter painter( &pix );
painter.setRenderHint( QPainter::Antialiasing );
context->setPainter( &painter );
QFontMetricsF fm( mTextOnSymbolTextFormat.scaledFont( *context ) );
qreal yBaselineVCenter = ( mIconSize.height() + fm.ascent() - fm.descent() ) / 2;
QgsTextRenderer::drawText( QPointF( mIconSize.width() / 2, yBaselineVCenter ), 0, QgsTextRenderer::AlignCenter,
QStringList() << mTextOnSymbolLabel, *context, mTextOnSymbolTextFormat );
}
}
else
{
pix = QPixmap( mIconSize );
pix.fill( Qt::transparent );
}
if ( mItem.level() == 0 || ( model() && model()->testFlag( QgsLayerTreeModel::ShowLegendAsTree ) ) )
mPixmap = pix;
else
{
// ident the symbol icon to make it look like a tree structure
QPixmap pix2( pix.width() + mItem.level() * INDENT_SIZE, pix.height() );
pix2.fill( Qt::transparent );
QPainter p( &pix2 );
p.drawPixmap( mItem.level() * INDENT_SIZE, 0, pix );
p.end();
mPixmap = pix2;
}
}
return mPixmap;
}
else if ( role == Qt::CheckStateRole )
{
if ( !mItem.isCheckable() )
return QVariant();
QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mLayerNode->layer() );
if ( !vlayer || !vlayer->renderer() )
return QVariant();
return vlayer->renderer()->legendSymbolItemChecked( mItem.ruleKey() ) ? Qt::Checked : Qt::Unchecked;
}
else if ( role == RuleKeyRole )
{
return mItem.ruleKey();
}
else if ( role == ParentRuleKeyRole )
{
return mItem.parentRuleKey();
}
return QVariant();
}
QSize QgsSymbolLegendNode::minimumIconSize() const
{
std::unique_ptr<QgsRenderContext> context( createTemporaryRenderContext() );
return minimumIconSize( context.get() );
}
QSize QgsSymbolLegendNode::minimumIconSize() const
{
QScopedPointer<QgsRenderContext> context( createTemporaryRenderContext() );
return minimumIconSize( context.data() );
}
