Method initLine

Gui/Edge.cpp:428–639

}

void
Edge::initLine()
{
    NodeGuiPtr source = _imp->source.lock();
    NodeGuiPtr dest = _imp->dest.lock();

    if (!source && !dest) {
        return;
    }

    double sc = scale();
    QRectF sourceBBOX = source ? mapFromItem( source.get(), source->boundingRect() ).boundingRect() : QRectF(0, 0, 1, 1);
    QRectF destBBOX = dest ? mapFromItem( dest.get(), dest->boundingRect() ).boundingRect()  : QRectF(0, 0, 1, 1);
    QSize dstNodeSize;
    QSize srcNodeSize;
    if (dest) {
        dstNodeSize = QSize( destBBOX.width(), destBBOX.height() );
    }
    if (source) {
        srcNodeSize = QSize( sourceBBOX.width(), sourceBBOX.height() );
    }

    QPointF dst;

    if (dest) {
        dst = destBBOX.center();
    } else if (source && !dest) {
        dst = QPointF( sourceBBOX.x(), sourceBBOX.y() ) + QPointF(srcNodeSize.width() / 2., srcNodeSize.height() + 10);
    }

    std::vector<QLineF> dstEdges;
    std::vector<QLineF> srcEdges;
    if (dest) {
        makeEdges(destBBOX, dstEdges);
    }
    if (source) {
        makeEdges(sourceBBOX, srcEdges);
    }


    QPointF srcpt;

    if (source && dest) {
        /// This is a connected edge, either input or output
        srcpt = sourceBBOX.center();
        setLine( dst.x(), dst.y(), srcpt.x(), srcpt.y() );
    } else if (!source && dest) {
        /// The edge is an input edge which is unconnected
        srcpt = QPointF( dst.x() + (std::cos(_imp->angle) * 100000 * sc),
                         dst.y() - (std::sin(_imp->angle) * 100000 * sc) );
        setLine( dst.x(), dst.y(), srcpt.x(), srcpt.y() );
    } else if (source && !dest) {
        /// The edge is an output edge which is unconnected
        srcpt = QPointF( sourceBBOX.x(), sourceBBOX.y() ) + QPointF(srcNodeSize.width() / 2., srcNodeSize.height() / 2.);
        setLine( dst.x(), dst.y(), srcpt.x(), srcpt.y() );
    }

    bool foundDstIntersection = false;