void AbstractDiagram::paintMarker( QPainter* painter,
const DataValueAttributes& a,
const QModelIndex& index,
const QPointF& pos )
{
if ( !checkInvariants() || !a.isVisible() ) return;
const MarkerAttributes ma = a.markerAttributes();
if ( !ma.isVisible() ) return;
const PainterSaver painterSaver( painter );
QSizeF maSize = ma.markerSize();
const qreal diagramWidth = d->diagramSize.width();
const qreal diagramHeight = d->diagramSize.height();
switch( ma.markerSizeMode() ) {
case MarkerAttributes::AbsoluteSize:
// Unscaled, i.e. without the painter's "zoom"
maSize.rwidth() /= painter->matrix().m11();
maSize.rheight() /= painter->matrix().m22();
break;
case MarkerAttributes::AbsoluteSizeScaled:
// Keep maSize as is. It is specified directly in pixels and desired
// to be effected by the painter's "zoom".
break;
case MarkerAttributes::RelativeToDiagramWidth:
maSize *= diagramWidth;
break;
case MarkerAttributes::RelativeToDiagramHeight:
maSize *= diagramHeight;
break;
case MarkerAttributes::RelativeToDiagramWidthHeightMin:
maSize *= qMin( diagramWidth, diagramHeight );
break;
}
QBrush indexBrush( brush( index ) );
QPen indexPen( ma.pen() );
if ( ma.markerColor().isValid() )
indexBrush.setColor( ma.markerColor() );
paintMarker( painter, ma, indexBrush, indexPen, pos, maSize );
// workaround: BC cannot be changed, otherwise we would pass the
// index down to next-lower paintMarker function. So far, we
// basically save a circle of radius maSize at pos in the
// reverseMapper. This means that ^^^ this version of paintMarker
// needs to be called to reverse-map the marker.
d->reverseMapper.addCircle( index.row(), index.column(), pos, 2 * maSize );
}
