: _graphModel(graphModel)

{

//

{

QSize s = size(nodeId);

double ratio = 0.20;

int widthMargin = s.width() * ratio;

int heightMargin = s.height() * ratio;

QMargins margins(widthMargin, heightMargin, widthMargin, heightMargin);

QRectF r(QPointF(0, 0), s);

return r.marginsAdded(margins);

PortType const portType,

PortIndex const index,

QTransform const &t) const

{

QPointF result = portPosition(nodeId, portType, index);

return t.map(result);

PortType const portType,

QPointF const nodePoint) const

{

auto const &nodeStyle = StyleCollection::nodeStyle();

PortIndex result = InvalidPortIndex;

if (portType == PortType::None)

return result;

double const tolerance = 2.0 * nodeStyle.ConnectionPointDiameter;

size_t const n = _graphModel.nodeData<unsigned int>(nodeId,

(portType == PortType::Out)

? NodeRole::OutPortCount

: NodeRole::InPortCount);

for (unsigned int portIndex = 0; portIndex < n; ++portIndex) {

auto pp = portPosition(nodeId, portType, portIndex);

QPointF p = pp - nodePoint;

auto distance = std::sqrt(QPointF::dotProduct(p, p));

if (distance < tolerance) {

result = portIndex;

break;

}

}

return result;