C++ KoPathPoint::setControlPoint1方法代码示例

void KarbonCalligraphicShape::addCap(int index1, int index2, int pointIndex,
                                     bool inverted)
{
    QPointF p1 = m_points[index1]->point();
    QPointF p2 = m_points[index2]->point();

    // TODO: review why spikes can appear with a lower limit
    QPointF delta = p2 - p1;
    if (delta.manhattanLength() < 1.0)
        return;

    QPointF direction = QLineF(QPointF(0, 0), delta).unitVector().p2();
    qreal width = m_points[index2]->width();
    QPointF p = p2 + direction * m_caps * width;

    KoPathPoint * newPoint = new KoPathPoint(this, p);

    qreal angle = m_points[index2]->angle();
    if (inverted)
        angle += M_PI;

    qreal dx = std::cos(angle) * width;
    qreal dy = std::sin(angle) * width;
    newPoint->setControlPoint1(QPointF(p.x() - dx / 2, p.y() - dy / 2));
    newPoint->setControlPoint2(QPointF(p.x() + dx / 2, p.y() + dy / 2));

    insertPoint(newPoint, KoPathPointIndex(0, pointIndex));
}

void KoPathControlPointMoveCommand::redo()
{
    KUndo2Command::redo();
    KoPathShape * pathShape = m_pointData.pathShape;
    KoPathPoint * point = pathShape->pointByIndex(m_pointData.pointIndex);
    if (point) {
        pathShape->update();

        if (m_pointType == KoPathPoint::ControlPoint1) {
            point->setControlPoint1(point->controlPoint1() + m_offset);
            if (point->properties() & KoPathPoint::IsSymmetric) {
                // set the other control point so that it lies on the line between the moved
                // control point and the point, with the same distance to the point as the moved point
                point->setControlPoint2(2.0 * point->point() - point->controlPoint1());
            } else if (point->properties() & KoPathPoint::IsSmooth) {
                // move the other control point so that it lies on the line through point and control point
                // keeping its distance to the point
                QPointF direction = point->point() - point->controlPoint1();
                direction /= sqrt(direction.x() * direction.x() + direction.y() * direction.y());
                QPointF distance = point->point() - point->controlPoint2();
                qreal length = sqrt(distance.x() * distance.x() + distance.y() * distance.y());
                point->setControlPoint2(point->point() + length * direction);
            }
        } else if (m_pointType == KoPathPoint::ControlPoint2) {
            point->setControlPoint2(point->controlPoint2() + m_offset);
            if (point->properties() & KoPathPoint::IsSymmetric) {
                // set the other control point so that it lies on the line between the moved
                // control point and the point, with the same distance to the point as the moved point
                point->setControlPoint1(2.0 * point->point() - point->controlPoint2());
            } else if (point->properties() & KoPathPoint::IsSmooth) {
                // move the other control point so that it lies on the line through point and control point
                // keeping its distance to the point
                QPointF direction = point->point() - point->controlPoint2();
                direction /= sqrt(direction.x() * direction.x() + direction.y() * direction.y());
                QPointF distance = point->point() - point->controlPoint1();
                qreal length = sqrt(distance.x() * distance.x() + distance.y() * distance.y());
                point->setControlPoint1(point->point() + length * direction);
            }
        }

        pathShape->normalize();
        pathShape->update();
    }
}

void KoPathPointTypeCommand::undoChanges(const QList<PointData> &data)
{
    QList<PointData>::const_iterator it(data.begin());
    for (; it != data.end(); ++it) {
        KoPathShape *pathShape = it->m_pointData.pathShape;
        KoPathPoint *point = pathShape->pointByIndex(it->m_pointData.pointIndex);

        point->setProperties(it->m_oldProperties);
        if (it->m_hadControlPoint1)
            point->setControlPoint1(pathShape->documentToShape(it->m_oldControlPoint1));
        else
            point->removeControlPoint1();
        if (it->m_hadControlPoint2)
            point->setControlPoint2(pathShape->documentToShape(it->m_oldControlPoint2));
        else
            point->removeControlPoint2();
    }
}

void KarbonSimplifyPath::removeDuplicates(KoPathShape *path)
{
    // NOTE: works because path has only has one subshape, if this ever moves in
    //       KoPathPoint it should be changed
    for (int i = 1; i < path->pointCount(); ++i) {
        KoPathPoint *p = path->pointByIndex(KoPathPointIndex(0, i));
        KoPathPoint *prev = path->pointByIndex(KoPathPointIndex(0, i - 1));
        QPointF diff = p->point() - prev->point();
        // if diff = 0 remove point
        if (qFuzzyCompare(diff.x() + 1, 1) && qFuzzyCompare(diff.y() + 1, 1)) {
            if (prev->activeControlPoint1())
                p->setControlPoint1(prev->controlPoint1());
            else
                p->removeControlPoint1();
            delete path->removePoint(KoPathPointIndex(0, i - 1));
            --i;
        }
    }
}

void KarbonWhirlPinchCommand::redo()
{
    d->pathShape->update();
    uint subpathCount = d->pathData.count();
    for( uint subpathIndex = 0; subpathIndex < subpathCount; ++subpathIndex )
    {
        uint pointCount = d->pathData[subpathIndex].count();
        for( uint pointIndex = 0; pointIndex < pointCount; ++pointIndex )
        {
            KoPathPoint * p = d->pathShape->pointByIndex( KoPathPointIndex( subpathIndex, pointIndex ) );
            p->setPoint( d->whirlPinch( p->point() ) );
            if( p->activeControlPoint1() )
                p->setControlPoint1( d->whirlPinch( p->controlPoint1() ) );
            if( p->activeControlPoint2() )
                p->setControlPoint2( d->whirlPinch( p->controlPoint2() ) );
        }
    }
    d->pathShape->normalize();
    d->pathShape->update();

    QUndoCommand::redo();
}

void KarbonCalligraphicShape::addCap(int index1, int index2, int pointIndex,
                                     bool inverted)
{
    QPointF p1 = m_points[index1]->point();
    QPointF p2 = m_points[index2]->point();
    qreal width = m_points[index2]->width();

    QPointF direction = QLineF(QPointF(0, 0), p2 - p1).unitVector().p2();
    QPointF p = p2 + direction * m_caps * width;

    KoPathPoint * newPoint = new KoPathPoint(this, p);

    qreal angle = m_points[index2]->angle();
    if (inverted)
        angle += M_PI;

    qreal dx = std::cos(angle) * width;
    qreal dy = std::sin(angle) * width;
    newPoint->setControlPoint1(QPointF(p.x() - dx / 2, p.y() - dy / 2));
    newPoint->setControlPoint2(QPointF(p.x() + dx / 2, p.y() + dy / 2));

    insertPoint(newPoint, KoPathPointIndex(0, pointIndex));
}

//.........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 );
        }
    }
}

void KoPathPointTypeCommand::redo()
{
    KUndo2Command::redo();
    repaint(false);
    m_additionalPointData.clear();

    QList<PointData>::iterator it(m_oldPointData.begin());
    for (; it != m_oldPointData.end(); ++it) {
        KoPathPoint *point = it->m_pointData.pathShape->pointByIndex(it->m_pointData.pointIndex);
        KoPathPoint::PointProperties properties = point->properties();

        switch (m_pointType) {
        case Line: {
            point->removeControlPoint1();
            point->removeControlPoint2();
            break;
        }
        case Curve: {
            KoPathPointIndex pointIndex = it->m_pointData.pointIndex;
            KoPathPointIndex prevIndex;
            KoPathPointIndex nextIndex;
            KoPathShape * path = it->m_pointData.pathShape;
            // get previous path node
            if (pointIndex.second > 0)
                prevIndex = KoPathPointIndex(pointIndex.first, pointIndex.second - 1);
            else if (pointIndex.second == 0 && path->isClosedSubpath(pointIndex.first))
                prevIndex = KoPathPointIndex(pointIndex.first, path->subpathPointCount(pointIndex.first) - 1);
            // get next node
            if (pointIndex.second < path->subpathPointCount(pointIndex.first) - 1)
                nextIndex = KoPathPointIndex(pointIndex.first, pointIndex.second + 1);
            else if (pointIndex.second < path->subpathPointCount(pointIndex.first) - 1
                     && path->isClosedSubpath(pointIndex.first))
                nextIndex = KoPathPointIndex(pointIndex.first, 0);

            KoPathPoint * prevPoint = path->pointByIndex(prevIndex);
            KoPathPoint * nextPoint = path->pointByIndex(nextIndex);

            if (prevPoint && ! point->activeControlPoint1() && appendPointData(KoPathPointData(path, prevIndex))) {
                KoPathSegment cubic = KoPathSegment(prevPoint, point).toCubic();
                if (prevPoint->activeControlPoint2()) {
                    prevPoint->setControlPoint2(cubic.first()->controlPoint2());
                    point->setControlPoint1(cubic.second()->controlPoint1());
                } else
                    point->setControlPoint1(cubic.second()->controlPoint1());
            }
            if (nextPoint && ! point->activeControlPoint2() && appendPointData(KoPathPointData(path, nextIndex))) {
                KoPathSegment cubic = KoPathSegment(point, nextPoint).toCubic();
                if (nextPoint->activeControlPoint1()) {
                    point->setControlPoint2(cubic.first()->controlPoint2());
                    nextPoint->setControlPoint1(cubic.second()->controlPoint1());
                } else
                    point->setControlPoint2(cubic.first()->controlPoint2());
            }
            break;
        }
        case Symmetric: {
            properties &= ~KoPathPoint::IsSmooth;
            properties |= KoPathPoint::IsSymmetric;

            // calculate vector from node point to first control point and normalize it
            QPointF directionC1 = point->controlPoint1() - point->point();
            qreal dirLengthC1 = sqrt(directionC1.x() * directionC1.x() + directionC1.y() * directionC1.y());
            directionC1 /= dirLengthC1;
            // calculate vector from node point to second control point and normalize it
            QPointF directionC2 = point->controlPoint2() - point->point();
            qreal dirLengthC2 = sqrt(directionC2.x() * directionC2.x() + directionC2.y() * directionC2.y());
            directionC2 /= dirLengthC2;
            // calculate the average distance of the control points to the node point
            qreal averageLength = 0.5 * (dirLengthC1 + dirLengthC2);
            // compute position of the control points so that they lie on a line going through the node point
            // the new distance of the control points is the average distance to the node point
            point->setControlPoint1(point->point() + 0.5 * averageLength * (directionC1 - directionC2));
            point->setControlPoint2(point->point() + 0.5 * averageLength * (directionC2 - directionC1));
        }
        break;
        case Smooth: {
            properties &= ~KoPathPoint::IsSymmetric;
            properties |= KoPathPoint::IsSmooth;

            // calculate vector from node point to first control point and normalize it
            QPointF directionC1 = point->controlPoint1() - point->point();
            qreal dirLengthC1 = sqrt(directionC1.x() * directionC1.x() + directionC1.y() * directionC1.y());
            directionC1 /= dirLengthC1;
            // calculate vector from node point to second control point and normalize it
            QPointF directionC2 = point->controlPoint2() - point->point();
            qreal dirLengthC2 = sqrt(directionC2.x() * directionC2.x() + directionC2.y() * directionC2.y());
            directionC2 /= dirLengthC2;
            // compute position of the control points so that they lie on a line going through the node point
            // the new distance of the control points is the average distance to the node point
            point->setControlPoint1(point->point() + 0.5 * dirLengthC1 * (directionC1 - directionC2));
            point->setControlPoint2(point->point() + 0.5 * dirLengthC2 * (directionC2 - directionC1));
        }
        break;
        case Corner:
        default:
            properties &= ~KoPathPoint::IsSymmetric;
            properties &= ~KoPathPoint::IsSmooth;
            break;
        }
        point->setProperties(properties);
//.........这里部分代码省略.........