/*!
\return Information to be displayed on the legend
The chart is represented by a list of entries - one for each bar title.
Each element contains a bar title and an icon showing its corresponding bar.
\sa barTitles(), legendIcon(), legendIconSize()
*/
QList<QwtLegendData> QwtPlotMultiBarChart::legendData() const
{
QList<QwtLegendData> list;
for ( int i = 0; i < d_data->barTitles.size(); i++ )
{
QwtLegendData data;
QVariant titleValue;
qVariantSetValue( titleValue, d_data->barTitles[i] );
data.setValue( QwtLegendData::TitleRole, titleValue );
if ( !legendIconSize().isEmpty() )
{
QVariant iconValue;
qVariantSetValue( iconValue,
legendIcon( i, legendIconSize() ) );
data.setValue( QwtLegendData::IconRole, iconValue );
}
list += data;
}
return list;
}
/*!
\brief Return all information, that is needed to represent
the item on the legend
In case of LegendBarTitles an entry for each bar is returned,
otherwise the chart is represented like any other plot item
from its title() and the legendIcon().
\sa title(), setLegendMode(), barTitle(), QwtLegend, QwtPlotLegendItem
*/
QList<QwtLegendData> QwtPlotBarChart::legendData() const
{
QList<QwtLegendData> list;
if ( d_data->legendMode == LegendBarTitles )
{
const size_t numSamples = dataSize();
for ( size_t i = 0; i < numSamples; i++ )
{
QwtLegendData data;
QVariant titleValue;
qVariantSetValue( titleValue, barTitle( i ) );
data.setValue( QwtLegendData::TitleRole, titleValue );
if ( !legendIconSize().isEmpty() )
{
QVariant iconValue;
qVariantSetValue( iconValue,
legendIcon( i, legendIconSize() ) );
data.setValue( QwtLegendData::IconRole, iconValue );
}
list += data;
}
}
else
{
return QwtPlotAbstractBarChart::legendData();
}
return list;
}
/*!
\brief Return all information, that is needed to represent
the item on the legend
Most items are represented by one entry on the legend
showing an icon and a text.
QwtLegendData is basically a list of QVariants that makes it
possible to overload and reimplement legendData() to
return almost any type of information, that is understood
by the receiver that acts as the legend.
The default implementation returns one entry with
the title() of the item and the legendIcon().
\sa title(), legendIcon(), QwtLegend
*/
QList<QwtLegendData> QwtPolarItem::legendData() const
{
QwtLegendData data;
QwtText label = title();
label.setRenderFlags( label.renderFlags() & Qt::AlignLeft );
QVariant titleValue;
qVariantSetValue( titleValue, label );
data.setValue( QwtLegendData::TitleRole, titleValue );
const QwtGraphic graphic = legendIcon( 0, legendIconSize() );
if ( !graphic.isNull() )
{
QVariant iconValue;
qVariantSetValue( iconValue, graphic );
data.setValue( QwtLegendData::IconRole, iconValue );
}
QList<QwtLegendData> list;
list += data;
return list;
}