//! Update the widget that represents the curve on the legend
// this was adapted from QwtPlotCurve::updateLegend()
void HistogramItem::updateLegend( QwtLegend *legend ) const
{
if ( !legend )
return;
QwtPlotItem::updateLegend( legend );
QWidget *widget = legend->find( this );
if ( !widget || !widget->inherits( "QwtLegendItem" ) )
return;
QwtLegendItem *legendItem = ( QwtLegendItem * )widget;
#if QT_VERSION < 0x040000
const bool doUpdate = legendItem->isUpdatesEnabled();
#else
const bool doUpdate = legendItem->updatesEnabled();
#endif
legendItem->setUpdatesEnabled( false );
const int policy = legend->displayPolicy();
if ( policy == QwtLegend::FixedIdentifier )
{
int mode = legend->identifierMode();
legendItem->setCurvePen( QPen( color() ) );
if ( mode & QwtLegendItem::ShowText )
legendItem->setText( title() );
else
legendItem->setText( QwtText() );
legendItem->setIdentifierMode( mode );
}
else if ( policy == QwtLegend::AutoIdentifier )
{
int mode = 0;
legendItem->setCurvePen( QPen( color() ) );
mode |= QwtLegendItem::ShowLine;
if ( !title().isEmpty() )
{
legendItem->setText( title() );
mode |= QwtLegendItem::ShowText;
}
else
{
legendItem->setText( QwtText() );
}
legendItem->setIdentifierMode( mode );
}
legendItem->setUpdatesEnabled( doUpdate );
legendItem->update();
}
void VectorPlot::addDotPlot(const MarkupQwtAdapter&adapter,
QColor color,
const QString &name,
bool addToLegend) {
QwtPlotCurve *curve = new QwtPlotCurve(name);
QwtSymbol sym;
sym.setPen(QColor(color));
sym.setBrush(QColor(color));
sym.setStyle(QwtSymbol::Rect);
sym.setSize(
QSize(1, 20)
);
curve->setSymbol(sym);
curve->setStyle(QwtPlotCurve::NoCurve);
if(adapter.size() > 0) {
setupPlot(adapter.boundingRect());
curve->setData(adapter);
curve->attach(plot);
}
if(!legend) {
return;
}
// Добавляем кривую в легенду
QwtLegendItem *item = new QwtLegendItem(0);
item->setText(curve->title());
item->setSymbol(sym);
item->setIdentifierMode(QwtLegendItem::ShowLine | QwtLegendItem::ShowSymbol | QwtLegendItem::ShowText);
legend->insert(curve, item);
}
void PlotCurve::updateLegend(QwtLegend *legend) const
{
QwtPlotCurve::updateLegend(legend);
QwtLegendItem *pQwtLegendItem = dynamic_cast<QwtLegendItem*>(legend->find(this));
if (pQwtLegendItem)
{
pQwtLegendItem->setIdentifierMode(QwtLegendItem::ShowLine);
pQwtLegendItem->setIdentifierWidth(30);
}
QwtPlotItem::updateLegend(legend);
}
//! Update the widget that represents the curve on the legend
void QwtPolarCurve::updateLegend( QwtLegend *legend ) const
{
if ( !legend )
return;
QwtPolarItem::updateLegend( legend );
QWidget *widget = legend->find( this );
if ( !widget || !widget->inherits( "QwtLegendItem" ) )
return;
QwtLegendItem *legendItem = ( QwtLegendItem * )widget;
#if QT_VERSION < 0x040000
const bool doUpdate = legendItem->isUpdatesEnabled();
#else
const bool doUpdate = legendItem->updatesEnabled();
#endif
legendItem->setUpdatesEnabled( false );
const int policy = legend->displayPolicy();
if ( policy == QwtLegend::FixedIdentifier )
{
int mode = legend->identifierMode();
if ( mode & QwtLegendItem::ShowLine )
legendItem->setCurvePen( pen() );
if ( mode & QwtLegendItem::ShowSymbol )
legendItem->setSymbol( symbol() );
if ( mode & QwtLegendItem::ShowText )
legendItem->setText( title() );
else
legendItem->setText( QwtText() );
legendItem->setIdentifierMode( mode );
}
else if ( policy == QwtLegend::AutoIdentifier )
{
int mode = 0;
if ( QwtPolarCurve::NoCurve != style() )
{
legendItem->setCurvePen( pen() );
mode |= QwtLegendItem::ShowLine;
}
if ( QwtSymbol::NoSymbol != symbol().style() )
{
legendItem->setSymbol( symbol() );
mode |= QwtLegendItem::ShowSymbol;
}
if ( !title().isEmpty() )
{
legendItem->setText( title() );
mode |= QwtLegendItem::ShowText;
}
else
{
legendItem->setText( QwtText() );
}
legendItem->setIdentifierMode( mode );
}
legendItem->setUpdatesEnabled( doUpdate );
legendItem->update();
}