C++ KoPathPoint::setProperty方法代码示例

void KoCreatePathTool::mouseReleaseEvent(KoPointerEvent *event)
{
    Q_D(KoCreatePathTool);

    if (! d->shape || (event->buttons() & Qt::RightButton))
        return;

    d->listeningToModifiers = true; // After the first press-and-release
    d->repaintActivePoint();
    d->pointIsDragged = false;
    KoPathPoint *lastActivePoint = d->activePoint;

    if (!d->finishAfterThisPoint) {
        d->activePoint = d->shape->lineTo(event->point);
        canvas()->snapGuide()->setIgnoredPathPoints((QList<KoPathPoint*>()<<d->activePoint));
    }

    // apply symmetric point property if applicable
    if (lastActivePoint->activeControlPoint1() && lastActivePoint->activeControlPoint2()) {
        QPointF diff1 = lastActivePoint->point() - lastActivePoint->controlPoint1();
        QPointF diff2 = lastActivePoint->controlPoint2() - lastActivePoint->point();
        if (qFuzzyCompare(diff1.x(), diff2.x()) && qFuzzyCompare(diff1.y(), diff2.y()))
            lastActivePoint->setProperty(KoPathPoint::IsSymmetric);
    }

    if (d->finishAfterThisPoint) {

        d->firstPoint->setControlPoint1(d->activePoint->controlPoint1());
        delete d->shape->removePoint(d->shape->pathPointIndex(d->activePoint));
        d->activePoint = d->firstPoint;
        d->shape->closeMerge();

        // we are closing the path, so reset the existing start path point
        d->existingStartPoint = 0;
        // finish path
        endPath();
    }

    if (d->angleSnapStrategy && lastActivePoint->activeControlPoint2()) {
        d->angleSnapStrategy->deactivate();
    }
}

//.........这里部分代码省略.........
            // connect the split points with curve
            // TODO: shall we create a correct arc?
            m_path->curveTo( P1, P2, P3 );

            prevSeg = nextParts.second;
            lastSeg = prevParts.first;
        }
        else
        {
            firstPoint = m_path->moveTo( currPoint->point() );
            prevSeg = nextSeg;
        }

        // Loop:
        for( int pointIndex = 1; pointIndex < pointCount; ++pointIndex )
        {
            nextSeg = m_copy->segmentByIndex( KoPathPointIndex( subpathIndex, pointIndex ) );
            if( ! nextSeg.isValid() )
                break;

            currPoint = nextSeg.first();
            if( ! currPoint )
                continue;

            if( currPoint->isSmooth( prevSeg.first(), nextSeg.second() ) )
            {
                // the current point has a smooth join, so we can add the previous segment
                // to our new path
                addSegment( m_path, prevSeg );
                prevSeg = nextSeg;
            }
            else
            {
                // split the previous segment at length - radius
                qreal prevLength = prevSeg.length();
                qreal prevSplit = prevLength > m_radius ? prevSeg.paramAtLength( prevLength-m_radius ) : 0.5;
                QPair<KoPathSegment,KoPathSegment> prevParts = prevSeg.splitAt( prevSplit );

                // add the remaining part up to the split point of the pervious segment
                lastPoint = addSegment( m_path, prevParts.first );

                // split the next segment at radius
                qreal nextLength = nextSeg.length();
                qreal nextSplit = nextLength > m_radius ? nextSeg.paramAtLength( m_radius ) : 0.5;
                QPair<KoPathSegment,KoPathSegment> nextParts = nextSeg.splitAt( nextSplit );

                // calculate smooth tangents
                QPointF P0 = prevParts.first.second()->point();
                QPointF P3 = nextParts.first.second()->point();
                qreal tangentLength1 = 0.5 * QLineF( P0, currPoint->point() ).length();
                qreal tangentLength2 = 0.5 * QLineF( P3, currPoint->point() ).length();
                QPointF P1 = P0 - tangentLength1 * tangentAtEnd( prevParts.first );
                QPointF P2 = P3 - tangentLength2 * tangentAtStart( nextParts.second );

                // connect the split points with curve
                // TODO: shall we create a correct arc?
                lastPoint = m_path->curveTo( P1, P2, P3 );

                prevSeg = nextParts.second;
            }

        }

        // End: take care of the last path point
        if( firstPointIsCorner )
        {
            // construct the closing segment
            lastPoint->setProperty( KoPathPoint::CloseSubpath );
            firstPoint->setProperty( KoPathPoint::CloseSubpath );
            switch( lastSeg.degree() )
            {
                case 1:
                    lastPoint->removeControlPoint2();
                    firstPoint->removeControlPoint1();
                    break;
                case 2:
                    if( lastSeg.first()->activeControlPoint2() )
                    {
                        lastPoint->setControlPoint2( lastSeg.first()->controlPoint2() );
                        firstPoint->removeControlPoint1();
                    }
                    else
                    {
                        lastPoint->removeControlPoint2();
                        firstPoint->setControlPoint1( lastSeg.second()->controlPoint1() );
                    }
                    break;
                case 3:
                    lastPoint->setControlPoint2( lastSeg.first()->controlPoint2() );
                    firstPoint->setControlPoint1( lastSeg.second()->controlPoint1() );
                    break;
            }
        }
        else
        {
            // add the last remaining segment
            addSegment( m_path, prevSeg );
        }
    }
}