void PlotMarkerLegend::updateLegend(QwtLegend* legend) const
{
if ( legend == NULL )
return;
if ( legend && testItemAttribute( QwtPlotItem::Legend ) && symbol() && symbol()->style() != QwtSymbol::NoSymbol )
{
QWidget *lgdItem = legend->find( this );
if ( lgdItem == NULL )
{
lgdItem = legendItem();
if ( lgdItem )
legend->insert( this, lgdItem );
}
LegendItem *l = qobject_cast<LegendItem *>( lgdItem );
if ( l )
l->setIdentifierSize( symbol()->boundingSize() );
}
QWidget *lgdItem = legend->find( this );
if ( testItemAttribute( QwtPlotItem::Legend ) )
{
LegendItem *label = qobject_cast<LegendItem *>( lgdItem );
if ( label )
{
// paint the identifier
const QSize sz = label->identifierSize();
QPixmap identifier( sz.width(), sz.height() );
identifier.fill( Qt::transparent );
QPainter painter( &identifier );
painter.setRenderHint( QPainter::Antialiasing, testRenderHint( QwtPlotItem::RenderAntialiased ) );
drawLegendIdentifier( &painter, QRect( 0, 0, sz.width(), sz.height() ) );
painter.end();
const bool doUpdate = label->updatesEnabled();
if ( doUpdate )
label->setUpdatesEnabled( false );
label->setText( title() );
label->setIdentifier( identifier );
label->setItemMode( legend->itemMode() );
if ( doUpdate )
label->setUpdatesEnabled( true );
label->update();
}
}
else
{
if ( lgdItem )
{
lgdItem->hide();
lgdItem->deleteLater();
}
}
}
//! Update the widget that represents the curve on the legend
void QwtPolarCurve::updateLegend( QwtLegend *legend ) const
{
if ( legend && testItemAttribute( QwtPolarCurve::Legend )
&& ( d_data->legendAttributes & QwtPolarCurve::LegendShowSymbol )
&& d_data->symbol
&& d_data->symbol->style() != QwtSymbol::NoSymbol )
{
QWidget *lgdItem = legend->find( this );
if ( lgdItem == NULL )
{
lgdItem = legendItem();
if ( lgdItem )
legend->insert( this, lgdItem );
}
QwtLegendItem *l = qobject_cast<QwtLegendItem *>( lgdItem );
if ( l )
{
QSize sz = d_data->symbol->boundingSize();
sz += QSize( 2, 2 ); // margin
if ( d_data->legendAttributes & QwtPolarCurve::LegendShowLine )
{
// Avoid, that the line is completely covered by the symbol
int w = qCeil( 1.5 * sz.width() );
if ( w % 2 )
w++;
sz.setWidth( qMax( 8, w ) );
}
l->setIdentifierSize( sz );
}
}
QwtPolarItem::updateLegend( legend );
}
/*!
\brief Update the widget that represents the item on the legend
\param legend Legend
\sa drawLegendIdentifier(), legendItem(), itemChanged(), QwtLegend()
*/
void QwtPlotCurve::updateLegend( QwtLegend *legend ) const
{
if ( legend && testItemAttribute( QwtPlotItem::Legend )
&& ( d_data->legendAttributes & QwtPlotCurve::LegendShowSymbol )
&& d_data->symbol
&& d_data->symbol->style() != QwtSymbol::NoSymbol )
{
QWidget *lgdItem = legend->find( this );
if ( lgdItem == NULL )
{
lgdItem = legendItem();
if ( lgdItem )
legend->insert( this, lgdItem );
}
if ( lgdItem && lgdItem->inherits( "QwtLegendItem" ) )
{
QwtLegendItem *l = ( QwtLegendItem * )lgdItem;
l->setIdentifierSize( d_data->symbol->boundingSize() );
}
}
QwtPlotItem::updateLegend( legend );
}
/*!
Update the legend of the parent plot.
\sa QwtPolarPlot::updateLegend(), itemChanged()
*/
void QwtPolarItem::legendChanged()
{
if ( testItemAttribute( QwtPolarItem::Legend ) && d_data->plot )
d_data->plot->updateLegend( this );
}
