void Link::paint(QPainter *painter,
const QStyleOptionGraphicsItem *style, QWidget *widget) {
if(m_from.isNull() || m_to.isNull()) return;
if(m_selected) painter->setPen(QPen(QBrush(Qt::green), 3.0));
else painter->setPen(QPen(QBrush(Qt::darkGreen), 3.0));
QLineF line(m_from->pos() + m_from->boundingRect().center(),
m_to->pos() + m_to->boundingRect().center());
painter->drawLine(line);
painter->setPen(QPen(QBrush(Qt::blue), 5.0));
QPointF line13 = (line.p1()*2+line.p2())/3;
QPointF line23 = (line.p1()+line.p2()*2)/3;
auto arrow1 = QLineF::fromPolar(15.0, line.angle() - 135);
auto arrow2 = QLineF::fromPolar(15.0, line.angle() + 135);
painter->drawLine(arrow1.translated(line13));
painter->drawLine(arrow2.translated(line13));
painter->drawLine(arrow1.translated(line23));
painter->drawLine(arrow2.translated(line23));
auto tbr = labelBoundingRect();
painter->setPen(Qt::lightGray);
if(m_selected) painter->setBrush(QBrush(Qt::yellow, Qt::SolidPattern));
else painter->setBrush(QBrush(Qt::lightGray, Qt::SolidPattern));
painter->drawRect(tbr);
if(m_rtsLink) painter->setPen(QPen(QBrush(Qt::darkRed), 3.0));
else painter->setPen(QPen(QBrush(Qt::red), 3.0));
painter->drawText(tbr.center() - QPointF(tbr.width()/2, -4), m_label);
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RiuQwtSymbol::renderSymbolLabel(QPainter *painter, const QPointF& position) const
{
QSize symbolSize = QwtSymbol::size();
QRect symbolRect (position.x(), position.y(), symbolSize.width(), symbolSize.height());
QRect labelRect = labelBoundingRect(painter, symbolRect);
painter->drawText(labelRect.topLeft(), m_label);
}
bool Link::isSelection(QPointF point) {
return labelBoundingRect().contains(point);
}
