/*!
\brief Create a widget to be inserted into the legend
The default implementation returns a QwtLegendLabel.
\param data Attributes of the legend entry
\return Widget representing data on the legend
\note updateWidget() will called soon after createWidget()
with the same attributes.
*/
QWidget *QwtLegend::createWidget( const QwtLegendData &data ) const
{
Q_UNUSED( data );
QwtLegendLabel *label = new QwtLegendLabel();
label->setItemMode( defaultItemMode() );
connect( label, SIGNAL( clicked() ), SLOT( itemClicked() ) );
connect( label, SIGNAL( checked( bool ) ), SLOT( itemChecked( bool ) ) );
return label;
}
/*!
\brief Update the widget
\param widget Usually a QwtLegendLabel
\param data Attributes to be displayed
\sa createWidget()
\note When widget is no QwtLegendLabel updateWidget() does nothing.
*/
void QwtLegend::updateWidget( QWidget *widget, const QwtLegendData &data )
{
QwtLegendLabel *label = qobject_cast<QwtLegendLabel *>( widget );
if ( label )
{
label->setData( data );
if ( !data.value( QwtLegendData::ModeRole ).isValid() )
{
// use the default mode, when there is no specific
// hint from the legend data
label->setItemMode( defaultItemMode() );
}
}
}