void RGraphicsSceneQt::exportRay(const RRay& ray) {
bool created = beginPath();
Q_ASSERT(currentPainterPath.isValid());
// find largest view box over all attached views:
RBox box;
QList<RGraphicsView*>::iterator it;
for (it=views.begin(); it!=views.end(); it++) {
RBox b = (*it)->getBox();
box.growToIncludeBox(b);
}
// trim line to view box:
RLine clippedLine = ray.getClippedLine(box);
double offs = clippedLine.getStartPoint().getDistanceTo(ray.getBasePoint());
if (RMath::isSameDirection(ray.getBasePoint().getAngleTo(clippedLine.getStartPoint()), ray.getDirection1())) {
offs *= -1;
}
exportLine(clippedLine, offs);
currentPainterPath.setAlwaysRegen(true);
if (created) {
endPath();
}
}
void RGraphicsSceneQt::exportEllipse(const REllipse& ellipse, double offset) {
bool created = beginPath();
RGraphicsScene::exportEllipse(ellipse, offset);
if (created) {
endPath();
}
}
void RGraphicsSceneQt::exportSpline(const RSpline& spline, double offset) {
bool created = beginPath();
RGraphicsScene::exportSpline(spline, offset);
if (created) {
endPath();
}
}
void RGraphicsSceneQt::exportArc(const RArc& arc, double offset, double w1, double w2) {
bool created = beginPath();
RGraphicsScene::exportArc(arc, offset, w1, w2);
if (created) {
endPath();
}
}
void RGraphicsSceneQt::exportPoint(const RPoint& point) {
bool created = beginPath();
currentPainterPath.addPoint(point.position);
if (created) {
endPath();
}
}
void RGraphicsSceneQt::exportPolyline(const RPolyline& polyline, bool polylineGen, double offset) {
// filling:
bool created = beginPath();
exportPolylineFill(polyline);
if (created) {
endPath();
}
// outline:
created = beginPath();
RGraphicsScene::exportPolyline(polyline, polylineGen, offset);
if (created) {
endPath();
}
}
double RGraphicsSceneQt::exportLine(const RLine& line, double offset, double w1, double w2) {
bool created = beginPath();
bool ret = RGraphicsScene::exportLine(line, offset, w1, w2);
if (created) {
endPath();
}
return ret;
}
void RGraphicsSceneQt::exportThickArc(const RArc& arc, double w1, double w2) {
if (RPolyline::hasProxy()) {
bool hasCurrentPath = false;
if (currentPainterPath.isValid()) {
hasCurrentPath = true;
endPath();
}
beginPath();
RPolyline::getPolylineProxy()->exportThickArc(currentPainterPath, arc, w1, w2);
currentPainterPath.setBrush(currentPen.color());
currentPainterPath.setPen(QPen(Qt::NoPen));
endPath();
if (hasCurrentPath) {
beginPath();
}
}
else {
exportArc(arc);
}
}
void RGraphicsSceneQt::exportPolylineFill(const RPolyline& polyline) {
if (currentBrush!=Qt::NoBrush) {
bool created = beginPath();
// TODO: support arc segments for filling:
QPolygonF qpolygon;
QList<RVector> points = polyline.getVertices();
for (int i = 0; i < points.size(); ++i) {
RVector v = points.at(i);
qpolygon << QPointF(v.x, v.y);
}
currentPainterPath.setBrush(currentBrush);
currentPainterPath.addPolygon(qpolygon);
if (created) {
endPath();
}
}
}
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();
}
}
void KoCreatePathTool::mousePressEvent(KoPointerEvent *event)
{
Q_D(KoCreatePathTool);
//Right click removes last point
if (event->button() == Qt::RightButton) {
removeLastPoint();
return;
}
const bool isOverFirstPoint = d->shape &&
handleGrabRect(d->firstPoint->point()).contains(event->point);
bool haveCloseModifier = (listeningToModifiers() && (event->modifiers() & Qt::ShiftModifier));
if ((event->button() == Qt::LeftButton) && haveCloseModifier && !isOverFirstPoint) {
endPathWithoutLastPoint();
return;
}
d->finishAfterThisPoint = false;
if (pathStarted()) {
if (isOverFirstPoint) {
d->activePoint->setPoint(d->firstPoint->point());
canvas()->updateCanvas(d->shape->boundingRect());
canvas()->updateCanvas(canvas()->snapGuide()->boundingRect());
if (haveCloseModifier) {
d->shape->closeMerge();
// we are closing the path, so reset the existing start path point
d->existingStartPoint = 0;
// finish path
endPath();
} else {
// the path shape will get closed when the user releases
// the mouse button
d->finishAfterThisPoint = true;
}
} else {
canvas()->updateCanvas(canvas()->snapGuide()->boundingRect());
QPointF point = canvas()->snapGuide()->snap(event->point, event->modifiers());
// check whether we hit an start/end node of an existing path
d->existingEndPoint = d->endPointAtPosition(point);
if (d->existingEndPoint.isValid() && d->existingEndPoint != d->existingStartPoint) {
point = d->existingEndPoint.path->shapeToDocument(d->existingEndPoint.point->point());
d->activePoint->setPoint(point);
// finish path
endPath();
} else {
d->activePoint->setPoint(point);
canvas()->updateCanvas(d->shape->boundingRect());
canvas()->updateCanvas(canvas()->snapGuide()->boundingRect());
}
}
} else {
KoPathShape *pathShape = new KoPathShape();
d->shape=pathShape;
pathShape->setShapeId(KoPathShapeId);
KoShapeStroke *stroke = new KoShapeStroke(canvas()->resourceManager()->activeStroke());
stroke->setColor(canvas()->resourceManager()->foregroundColor().toQColor());
pathShape->setStroke(stroke);
canvas()->updateCanvas(canvas()->snapGuide()->boundingRect());
QPointF point = canvas()->snapGuide()->snap(event->point, event->modifiers());
// check whether we hit an start/end node of an existing path
d->existingStartPoint = d->endPointAtPosition(point);
if (d->existingStartPoint.isValid()) {
point = d->existingStartPoint.path->shapeToDocument(d->existingStartPoint.point->point());
}
d->activePoint = pathShape->moveTo(point);
d->firstPoint = d->activePoint;
canvas()->updateCanvas(handlePaintRect(point));
canvas()->updateCanvas(canvas()->snapGuide()->boundingRect());
canvas()->snapGuide()->setEditedShape(pathShape);
d->angleSnapStrategy = new AngleSnapStrategy(d->angleSnappingDelta, d->angleSnapStatus);
canvas()->snapGuide()->addCustomSnapStrategy(d->angleSnapStrategy);
}
if (d->angleSnapStrategy)
d->angleSnapStrategy->setStartPoint(d->activePoint->point());
}
/* genEllipticPath:
* Approximate an elliptical arc via Beziers of given degree
* threshold indicates quality of approximation
* if isSlice is true, the path begins and ends with line segments
* to the center of the ellipse.
* Returned path must be freed by the caller.
*/
static Ppolyline_t *genEllipticPath(ellipse_t * ep, int degree,
double threshold, boolean isSlice)
{
double dEta;
double etaB;
double cosEtaB;
double sinEtaB;
double aCosEtaB;
double bSinEtaB;
double aSinEtaB;
double bCosEtaB;
double xB;
double yB;
double xBDot;
double yBDot;
double t;
double alpha;
Ppolyline_t *path = NEW(Ppolyline_t);
// find the number of Bezier curves needed
boolean found = FALSE;
int i, n = 1;
while ((!found) && (n < 1024)) {
double dEta = (ep->eta2 - ep->eta1) / n;
if (dEta <= 0.5 * M_PI) {
double etaB = ep->eta1;
found = TRUE;
for (i = 0; found && (i < n); ++i) {
double etaA = etaB;
etaB += dEta;
found =
(estimateError(ep, degree, etaA, etaB) <= threshold);
}
}
n = n << 1;
}
dEta = (ep->eta2 - ep->eta1) / n;
etaB = ep->eta1;
cosEtaB = cos(etaB);
sinEtaB = sin(etaB);
aCosEtaB = ep->a * cosEtaB;
bSinEtaB = ep->b * sinEtaB;
aSinEtaB = ep->a * sinEtaB;
bCosEtaB = ep->b * cosEtaB;
xB = ep->cx + aCosEtaB * ep->cosTheta - bSinEtaB * ep->sinTheta;
yB = ep->cy + aCosEtaB * ep->sinTheta + bSinEtaB * ep->cosTheta;
xBDot = -aSinEtaB * ep->cosTheta - bCosEtaB * ep->sinTheta;
yBDot = -aSinEtaB * ep->sinTheta + bCosEtaB * ep->cosTheta;
if (isSlice) {
moveTo(path, ep->cx, ep->cy);
lineTo(path, xB, yB);
} else {
moveTo(path, xB, yB);
}
t = tan(0.5 * dEta);
alpha = sin(dEta) * (sqrt(4 + 3 * t * t) - 1) / 3;
for (i = 0; i < n; ++i) {
double xA = xB;
double yA = yB;
double xADot = xBDot;
double yADot = yBDot;
etaB += dEta;
cosEtaB = cos(etaB);
sinEtaB = sin(etaB);
aCosEtaB = ep->a * cosEtaB;
bSinEtaB = ep->b * sinEtaB;
aSinEtaB = ep->a * sinEtaB;
bCosEtaB = ep->b * cosEtaB;
xB = ep->cx + aCosEtaB * ep->cosTheta - bSinEtaB * ep->sinTheta;
yB = ep->cy + aCosEtaB * ep->sinTheta + bSinEtaB * ep->cosTheta;
xBDot = -aSinEtaB * ep->cosTheta - bCosEtaB * ep->sinTheta;
yBDot = -aSinEtaB * ep->sinTheta + bCosEtaB * ep->cosTheta;
if (degree == 1) {
lineTo(path, xB, yB);
#if DO_QUAD
} else if (degree == 2) {
double k = (yBDot * (xB - xA) - xBDot * (yB - yA))
/ (xADot * yBDot - yADot * xBDot);
quadTo(path, (xA + k * xADot), (yA + k * yADot), xB, yB);
#endif
} else {
curveTo(path, (xA + alpha * xADot), (yA + alpha * yADot),
(xB - alpha * xBDot), (yB - alpha * yBDot), xB, yB);
}
}
endPath(path, isSlice);
return path;
}