File indexing completed on 2024-05-12 15:56:49

 /* This file is part of the KDE project
 
    SPDX-FileCopyrightText: 2006-2008 Thorsten Zachmann <zachmann@kde.org>
    SPDX-FileCopyrightText: 2006-2010 Thomas Zander <zander@kde.org>
    SPDX-FileCopyrightText: 2009-2010 Jan Hambrecht <jaham@gmx.net>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "KoShapeManager.h"
 #include "KoShapeManager_p.h"
 #include "KoSelection.h"
 #include "KoToolManager.h"
 #include "KoPointerEvent.h"
 #include "KoShape.h"
 #include "KoShape_p.h"
 #include "KoCanvasBase.h"
 #include "KoShapeContainer.h"
 #include "KoShapeStrokeModel.h"
 #include "KoShapeGroup.h"
 #include "KoToolProxy.h"
 #include "KoShapeShadow.h"
 #include "KoShapeLayer.h"
 #include "KoFilterEffect.h"
 #include "KoFilterEffectStack.h"
 #include "KoFilterEffectRenderContext.h"
 #include "KoShapeBackground.h"
 #include <KoRTree.h>
 #include "KoClipPath.h"
 #include "KoClipMaskPainter.h"
 #include "KoViewConverter.h"
 #include "KisQPainterStateSaver.h"
 #include "KoSvgTextChunkShape.h"
 #include "KoSvgTextShape.h"
 #include <QApplication>
 
 #include <QPainter>
 #include <QPainterPath>
 #include <QTimer>
 #include <FlakeDebug.h>
 
 #include "kis_painting_tweaks.h"
 #include "kis_debug.h"
 #include "KisForest.h"
 #include <unordered_set>
 
 
 namespace {
 
 /**
  * Returns whether the shape should be added to the RTree for collision and ROI
  * detection.
  */
 inline bool shapeUsedInRenderingTree(KoShape *shape)
 {
     // FIXME: make more general!
 
     return !dynamic_cast<KoShapeGroup*>(shape) &&
             !dynamic_cast<KoShapeLayer*>(shape) &&
             !(dynamic_cast<KoSvgTextChunkShape*>(shape) && !dynamic_cast<KoSvgTextShape*>(shape));
 }
 
 /**
  * Returns whether a shape should be added to the rendering tree because of
  * its clip mask/path or effects.
  */
 inline bool shapeHasGroupEffects(KoShape *shape) {
     return shape->clipPath() ||
         (shape->filterEffectStack() && !shape->filterEffectStack()->isEmpty()) ||
         shape->clipMask();
 }
 
 /**
  * Returns true if the shape is not fully transparent
  */
 inline bool shapeIsVisible(KoShape *shape) {
     return shape->isVisible(false) && shape->transparency() < 1.0;
 }
 
 
 /**
  * Populate \p tree with the subtree of shapes pointed by a shape \p parentShape.
  * All new shapes are added as children of \p parentIt. Please take it into account
  * that \c *parentIt might be not the same as \c parentShape, because \c parentShape
  * may be hidden from rendering.
  */
 void populateRenderSubtree(KoShape *parentShape,
                            KisForest<KoShape*>::child_iterator parentIt,
                            KisForest<KoShape*> &tree,
                            std::function<bool(KoShape*)> shouldIncludeNode,
                            std::function<bool(KoShape*)> shouldEnterSubtree)
 {
     KoShapeContainer *parentContainer = dynamic_cast<KoShapeContainer*>(parentShape);
     if (!parentContainer) return;
 
     QList<KoShape*> children = parentContainer->shapes();
     std::sort(children.begin(), children.end(), KoShape::compareShapeZIndex);
 
     for (auto it = children.constBegin(); it != children.constEnd(); ++it) {
         auto newParentIt = parentIt;
 
         if (shouldIncludeNode(*it)) {
             newParentIt = tree.insert(childEnd(parentIt), *it);
         }
 
         if (shouldEnterSubtree(*it)) {
             populateRenderSubtree(*it, newParentIt, tree, shouldIncludeNode, shouldEnterSubtree);
         }
     }
 
 }
 
 /**
  * Build a rendering tree for **leaf** nodes defined by \p leafNodes
  *
  * Sometimes we should render only a part of the layer (e.g. when we render
  * in patches). So we shouldn't render the whole graph. The problem is that
  * some of the shapes may have parents with clip paths/masks and/or effects.
  * In such a case, these parents should be also included into the rendering
  * process.
  *
  * \c buildRenderTree() builds a graph for such rendering. It includes the
  * leaf shapes themselves, and all parent shapes that have some effects affecting
  * these shapes.
  */
 void buildRenderTree(QList<KoShape*> leafShapes,
                      KisForest<KoShape*> &tree)
 {
     QList<KoShape*> sortedShapes = leafShapes;
     std::sort(sortedShapes.begin(), sortedShapes.end(), KoShape::compareShapeZIndex);
 
     std::unordered_set<KoShape*> includedShapes;
 
     Q_FOREACH (KoShape *shape, sortedShapes) {
         bool shouldSkipShape = !shapeIsVisible(shape);
         if (shouldSkipShape) continue;
 
         bool shapeIsPartOfIncludedSubtree = false;
         QVector<KoShape*> hierarchy = {shape};
 
         while ((shape = shape->parent())) {
             if (!shapeIsVisible(shape)) {
                 shouldSkipShape = true;
                 break;
             }
 
             if (includedShapes.find(shape) != end(includedShapes)) {
                 shapeIsPartOfIncludedSubtree = true;
                 break;
             }
 
             if (shapeHasGroupEffects(shape)) {
                 hierarchy << shape;
             }
         }
 
         if (shouldSkipShape) continue;
 
         if (!shapeIsPartOfIncludedSubtree &&
             includedShapes.find(hierarchy.last()) == end(includedShapes)) {
 
             tree.insert(childEnd(tree), hierarchy.last());
         }
         std::copy(hierarchy.begin(), hierarchy.end(),
                   std::inserter(includedShapes, end(includedShapes)));
     }
 
     auto shouldIncludeShape =
         [includedShapes] (KoShape *shape) {
             // included shapes are guaranteed to be visible
             return includedShapes.find(shape) != end(includedShapes);
         };
 
     for (auto it = childBegin(tree); it != childEnd(tree); ++it) {
         populateRenderSubtree(*it, it, tree, shouldIncludeShape, &shapeIsVisible);
     }
 }
 
 /**
  * Render the prebuilt rendering tree on \p painter
  */
 void renderShapes(typename KisForest<KoShape*>::child_iterator beginIt,
                   typename KisForest<KoShape*>::child_iterator endIt,
                   QPainter &painter)
 {
     for (auto it = beginIt; it != endIt; ++it) {
         KoShape *shape = *it;
 
         KisQPainterStateSaver saver(&painter);
 
         if (!isEnd(parent(it))) {
             painter.setTransform(shape->transformation() * painter.transform());
         } else {
             painter.setTransform(shape->absoluteTransformation() * painter.transform());
         }
 
         KoClipPath::applyClipping(shape, painter);
 
         qreal transparency = shape->transparency(true);
         if (transparency > 0.0) {
             painter.setOpacity(1.0-transparency);
         }
 
         if (shape->shadow()) {
             KisQPainterStateSaver saver(&painter);
             shape->shadow()->paint(shape, painter);
         }
 
         QScopedPointer<KoClipMaskPainter> clipMaskPainter;
         QPainter *shapePainter = &painter;
 
         KoClipMask *clipMask = shape->clipMask();
         if (clipMask) {
             const QRectF bounds = painter.transform().mapRect(shape->outlineRect());
 
             clipMaskPainter.reset(new KoClipMaskPainter(&painter, bounds/*shape->boundingRect())*/));
             shapePainter = clipMaskPainter->shapePainter();
         }
 
         /**
          * We expect the shape to save/restore the painter's state itself. Such design was not
          * not always here, so we need a period of sanity checks to ensure all the shapes are
          * ported correctly.
          */
         const QTransform sanityCheckTransformSaved = shapePainter->transform();
 
         renderShapes(childBegin(it), childEnd(it), *shapePainter);
 
         shape->paint(*shapePainter);
         shape->paintStroke(*shapePainter);
 
         KIS_SAFE_ASSERT_RECOVER(shapePainter->transform() == sanityCheckTransformSaved) {
             shapePainter->setTransform(sanityCheckTransformSaved);
         }
 
         if (clipMask) {
             clipMaskPainter->maskPainter()->save();
 
             shape->clipMask()->drawMask(clipMaskPainter->maskPainter(), shape);
             clipMaskPainter->renderOnGlobalPainter();
 
             clipMaskPainter->maskPainter()->restore();
         }
     }
 }
 
 }
 
 void KoShapeManager::Private::updateTree()
 {
     bool selectionModified = false;
     bool anyModified = false;
 
     {
         QMutexLocker l(&this->treeMutex);
 
         Q_FOREACH (KoShape *shape, aggregate4update) {
             selectionModified = selectionModified || selection->isSelected(shape);
             anyModified = true;
         }
 
         foreach (KoShape *shape, aggregate4update) {
             if (!shapeUsedInRenderingTree(shape)) continue;
 
             tree.remove(shape);
             QRectF br(shape->boundingRect());
             tree.insert(br, shape);
         }
 
         aggregate4update.clear();
         shapeIndexesBeforeUpdate.clear();
     }
 
     if (selectionModified) {
         emit q->selectionContentChanged();
     }
     if (anyModified) {
         emit q->contentChanged();
     }
 }
 
 void KoShapeManager::Private::forwardCompressedUdpate()
 {
     bool shouldUpdateDecorations = false;
     QRectF scheduledUpdate;
 
     {
         QMutexLocker l(&shapesMutex);
 
         if (!compressedUpdate.isEmpty()) {
             scheduledUpdate = compressedUpdate;
             compressedUpdate = QRect();
         }
 
         Q_FOREACH (const KoShape *shape, compressedUpdatedShapes) {
             if (selection->isSelected(shape)) {
                 shouldUpdateDecorations = true;
                 break;
             }
         }
         compressedUpdatedShapes.clear();
     }
 
     if (shouldUpdateDecorations && canvas->toolProxy()) {
         canvas->toolProxy()->repaintDecorations();
     }
     canvas->updateCanvas(scheduledUpdate);
 
 }
 
 KoShapeManager::KoShapeManager(KoCanvasBase *canvas, const QList<KoShape *> &shapes)
     : d(new Private(this, canvas))
 {
     Q_ASSERT(d->canvas); // not optional.
     connect(d->selection, SIGNAL(selectionChanged()), this, SIGNAL(selectionChanged()));
     setShapes(shapes);
 
     /**
      * Shape manager uses signal compressors with timers, therefore
      * it might handle queued signals, therefore it should belong
      * to the GUI thread.
      */
     this->moveToThread(qApp->thread());
     connect(&d->updateCompressor, SIGNAL(timeout()), this, SLOT(forwardCompressedUdpate()));
 }
 
 KoShapeManager::KoShapeManager(KoCanvasBase *canvas)
     : d(new Private(this, canvas))
 {
     Q_ASSERT(d->canvas); // not optional.
     connect(d->selection, SIGNAL(selectionChanged()), this, SIGNAL(selectionChanged()));
 
     // see a comment in another constructor
     this->moveToThread(qApp->thread());
     connect(&d->updateCompressor, SIGNAL(timeout()), this, SLOT(forwardCompressedUdpate()));
 }
 
 void KoShapeManager::Private::unlinkFromShapesRecursively(const QList<KoShape*> &shapes)
 {
     Q_FOREACH (KoShape *shape, shapes) {
         shape->removeShapeManager(q);
 
         KoShapeContainer *container = dynamic_cast<KoShapeContainer*>(shape);
         if (container) {
             unlinkFromShapesRecursively(container->shapes());
         }
     }
 }
 
 KoShapeManager::~KoShapeManager()
 {
     d->unlinkFromShapesRecursively(d->shapes);
     d->shapes.clear();
 
     delete d;
 }
 
 void KoShapeManager::setShapes(const QList<KoShape *> &shapes, Repaint repaint)
 {
     {
         QMutexLocker l1(&d->shapesMutex);
         QMutexLocker l2(&d->treeMutex);
 
         //clear selection
         d->selection->deselectAll();
         d->unlinkFromShapesRecursively(d->shapes);
         d->compressedUpdate = QRect();
         d->compressedUpdatedShapes.clear();
         d->aggregate4update.clear();
         d->shapeIndexesBeforeUpdate.clear();
         d->tree.clear();
         d->shapes.clear();
     }
 
     Q_FOREACH (KoShape *shape, shapes) {
         addShape(shape, repaint);
     }
 }
 
 void KoShapeManager::addShape(KoShape *shape, Repaint repaint)
 {
     {
         QMutexLocker l1(&d->shapesMutex);
 
         if (d->shapes.contains(shape))
             return;
         shape->addShapeManager(this);
         d->shapes.append(shape);
 
         if (shapeUsedInRenderingTree(shape)) {
             QMutexLocker l2(&d->treeMutex);
 
             QRectF br(shape->boundingRect());
             d->tree.insert(br, shape);
         }
     }
 
     if (repaint == PaintShapeOnAdd) {
         shape->update();
     }
 
     // add the children of a KoShapeContainer
     KoShapeContainer *container = dynamic_cast<KoShapeContainer*>(shape);
 
     if (container) {
         foreach (KoShape *containerShape, container->shapes()) {
             addShape(containerShape, repaint);
         }
     }
 }
 
 void KoShapeManager::remove(KoShape *shape)
 {
     QRectF dirtyRect;
     {
         QMutexLocker l1(&d->shapesMutex);
         QMutexLocker l2(&d->treeMutex);
 
         dirtyRect = shape->boundingRect();
 
         shape->removeShapeManager(this);
         d->selection->deselect(shape);
         d->aggregate4update.remove(shape);
         d->compressedUpdatedShapes.remove(shape);
 
         if (shapeUsedInRenderingTree(shape)) {
             d->tree.remove(shape);
         }
         d->shapes.removeAll(shape);
     }
 
     if (!dirtyRect.isEmpty()) {
         d->canvas->updateCanvas(dirtyRect);
     }
 
     // remove the children of a KoShapeContainer
     KoShapeContainer *container = dynamic_cast<KoShapeContainer*>(shape);
     if (container) {
         foreach (KoShape *containerShape, container->shapes()) {
             remove(containerShape);
         }
     }
 }
 
 KoShapeManager::ShapeInterface::ShapeInterface(KoShapeManager *_q)
     : q(_q)
 {
 }
 
 void KoShapeManager::ShapeInterface::notifyShapeDestructed(KoShape *shape)
 {
     QMutexLocker l1(&q->d->shapesMutex);
     QMutexLocker l2(&q->d->treeMutex);
 
     q->d->selection->deselect(shape);
     q->d->aggregate4update.remove(shape);
     q->d->compressedUpdatedShapes.remove(shape);
 
     // we cannot access RTTI of the semi-destructed shape, so just
     // unlink it lazily
     if (q->d->tree.contains(shape)) {
         q->d->tree.remove(shape);
     }
 
     q->d->shapes.removeAll(shape);
 }
 
 
 KoShapeManager::ShapeInterface *KoShapeManager::shapeInterface()
 {
     return &d->shapeInterface;
 }
 
 void KoShapeManager::preparePaintJobs(PaintJobsOrder &jobsOrder,
                                       KoShape *excludeRoot)
 {
     d->updateTree();
 
     QMutexLocker l1(&d->shapesMutex);
 
     QSet<KoShape*> rootShapesSet;
     Q_FOREACH (KoShape *shape, d->shapes) {
         while (shape->parent() && shape->parent() != excludeRoot) {
             shape = shape->parent();
         }
 
         if (!rootShapesSet.contains(shape) && shape != excludeRoot) {
             rootShapesSet.insert(shape);
         }
     }
 #if QT_VERSION >= QT_VERSION_CHECK(5,14,0)
     const QList<KoShape*> rootShapes(rootShapesSet.begin(), rootShapesSet.end());
 #else
     const QList<KoShape*> rootShapes = QList<KoShape*>::fromSet(rootShapesSet);
 #endif
     QList<KoShape*> newRootShapes;
 
     Q_FOREACH (KoShape *srcShape, rootShapes) {
         KIS_SAFE_ASSERT_RECOVER(srcShape->parent() == excludeRoot
                                 || !srcShape->parent()) {
             continue;
         }
 
         KoShape *clonedShape = srcShape->cloneShape();
 
         KoShapeContainer *parentShape = srcShape->parent();
 
         if (parentShape && !parentShape->transformation().isIdentity()) {
             clonedShape->applyAbsoluteTransformation(parentShape->transformation());
         }
 
         newRootShapes << clonedShape;
     }
 
     PaintJobsOrder result;
 
     PaintJob::SharedSafeStorage shapesStorage = std::make_shared<PaintJob::ShapesStorage>();
     Q_FOREACH (KoShape *shape, newRootShapes) {
         shapesStorage->emplace_back(std::unique_ptr<KoShape>(shape));
     }
 
     const QList<KoShape*> originalShapes = KoShape::linearizeSubtreeSorted(rootShapes);
     const QList<KoShape*> clonedShapes = KoShape::linearizeSubtreeSorted(newRootShapes);
     KIS_SAFE_ASSERT_RECOVER_RETURN(clonedShapes.size() == originalShapes.size());
 
     QHash<KoShape*, KoShape*> clonedFromOriginal;
     for (int i = 0; i < originalShapes.size(); i++) {
         clonedFromOriginal[originalShapes[i]] = clonedShapes[i];
     }
 
 
     for (auto it = std::begin(jobsOrder.jobs); it != std::end(jobsOrder.jobs); ++it) {
         QMutexLocker l(&d->treeMutex);
         QList<KoShape*> unsortedOriginalShapes = d->tree.intersects(it->docUpdateRect);
 
         it->allClonedShapes = shapesStorage;
 
         Q_FOREACH (KoShape *shape, unsortedOriginalShapes) {
             KIS_SAFE_ASSERT_RECOVER(shapeUsedInRenderingTree(shape)) { continue; }
             it->shapes << clonedFromOriginal[shape];
         }
     }
 }
 
 void KoShapeManager::paintJob(QPainter &painter, const KoShapeManager::PaintJob &job)
 {
     painter.setPen(Qt::NoPen);  // painters by default have a black stroke, lets turn that off.
     painter.setBrush(Qt::NoBrush);
 
     KisForest<KoShape*> renderTree;
     buildRenderTree(job.shapes, renderTree);
 
     renderShapes(childBegin(renderTree), childEnd(renderTree), painter);
 }
 
 void KoShapeManager::paint(QPainter &painter)
 {
     d->updateTree();
 
     QMutexLocker l1(&d->shapesMutex);
 
     painter.setPen(Qt::NoPen);  // painters by default have a black stroke, lets turn that off.
     painter.setBrush(Qt::NoBrush);
 
     QList<KoShape*> unsortedShapes;
     if (painter.hasClipping()) {
         QMutexLocker l(&d->treeMutex);
 
         QRectF rect = KisPaintingTweaks::safeClipBoundingRect(painter);
         unsortedShapes = d->tree.intersects(rect);
     } else {
         unsortedShapes = d->shapes;
         warnFlake << "KoShapeManager::paint  Painting with a painter that has no clipping will lead to too much being painted!";
     }
 
     KisForest<KoShape*> renderTree;
     buildRenderTree(unsortedShapes, renderTree);
     renderShapes(childBegin(renderTree), childEnd(renderTree), painter);
 }
 
 void KoShapeManager::renderSingleShape(KoShape *shape, QPainter &painter)
 {
     KisForest<KoShape*> renderTree;
 
     KoViewConverter converter;
 
     auto root = renderTree.insert(childBegin(renderTree), shape);
     populateRenderSubtree(shape, root, renderTree, &shapeIsVisible, &shapeIsVisible);
     renderShapes(childBegin(renderTree), childEnd(renderTree), painter);
 }
 
 KoShape *KoShapeManager::shapeAt(const QPointF &position, KoFlake::ShapeSelection selection, bool omitHiddenShapes)
 {
     d->updateTree();
 
     QMutexLocker l(&d->shapesMutex);
 
     QList<KoShape*> sortedShapes;
 
     {
         QMutexLocker l(&d->treeMutex);
         sortedShapes = d->tree.contains(position);
     }
 
     std::sort(sortedShapes.begin(), sortedShapes.end(), KoShape::compareShapeZIndex);
     KoShape *firstUnselectedShape = 0;
     for (int count = sortedShapes.count() - 1; count >= 0; count--) {
         KoShape *shape = sortedShapes.at(count);
         if (omitHiddenShapes && ! shape->isVisible())
             continue;
         if (! shape->hitTest(position))
             continue;
 
         switch (selection) {
         case KoFlake::ShapeOnTop:
             if (shape->isSelectable())
                 return shape;
             break;
         case KoFlake::Selected:
             if (d->selection->isSelected(shape))
                 return shape;
             break;
         case KoFlake::Unselected:
             if (! d->selection->isSelected(shape))
                 return shape;
             break;
         case KoFlake::NextUnselected:
             // we want an unselected shape
             if (d->selection->isSelected(shape))
                 continue;
             // memorize the first unselected shape
             if (! firstUnselectedShape)
                 firstUnselectedShape = shape;
             // check if the shape above is selected
             if (count + 1 < sortedShapes.count() && d->selection->isSelected(sortedShapes.at(count + 1)))
                 return shape;
             break;
         }
     }
     // if we want the next unselected below a selected but there was none selected,
     // return the first found unselected shape
     if (selection == KoFlake::NextUnselected && firstUnselectedShape)
         return firstUnselectedShape;
 
     if (d->selection->hitTest(position))
         return d->selection;
 
     return 0; // missed everything
 }
 
 QList<KoShape *> KoShapeManager::shapesAt(const QRectF &rect, bool omitHiddenShapes, bool containedMode)
 {
     QMutexLocker l(&d->shapesMutex);
 
     d->updateTree();
     QList<KoShape*> shapes;
 
     {
         QMutexLocker l(&d->treeMutex);
         shapes = containedMode ? d->tree.contained(rect) : d->tree.intersects(rect);
     }
 
     for (int count = shapes.count() - 1; count >= 0; count--) {
 
         KoShape *shape = shapes.at(count);
 
         if (omitHiddenShapes && !shape->isVisible()) {
             shapes.removeAt(count);
         } else {
             const QPainterPath outline = shape->absoluteTransformation().map(shape->outline());
 
             if (!containedMode && !outline.intersects(rect) && !outline.contains(rect)) {
                 shapes.removeAt(count);
 
             } else if (containedMode) {
 
                 QPainterPath containingPath;
                 containingPath.addRect(rect);
 
                 if (!containingPath.contains(outline)) {
                     shapes.removeAt(count);
                 }
             }
         }
     }
 
     return shapes;
 }
 
 void KoShapeManager::update(const QRectF &rect, const KoShape *shape, bool selectionHandles)
 {
     if (d->updatesBlocked) return;
 
     {
         QMutexLocker l(&d->shapesMutex);
 
         d->compressedUpdate |= rect;
 
         if (selectionHandles) {
             d->compressedUpdatedShapes.insert(shape);
         }
     }
 
     d->updateCompressor.start();
 }
 
 void KoShapeManager::setUpdatesBlocked(bool value)
 {
     d->updatesBlocked = value;
 }
 
 bool KoShapeManager::updatesBlocked() const
 {
     return d->updatesBlocked;
 }
 void KoShapeManager::notifyShapeChanged(KoShape *shape)
 {
     {
         QMutexLocker l(&d->treeMutex);
 
         Q_ASSERT(shape);
         if (d->aggregate4update.contains(shape)) {
             return;
         }
 
         d->aggregate4update.insert(shape);
         d->shapeIndexesBeforeUpdate.insert(shape, shape->zIndex());
     }
 
     KoShapeContainer *container = dynamic_cast<KoShapeContainer*>(shape);
     if (container) {
         Q_FOREACH (KoShape *child, container->shapes())
             notifyShapeChanged(child);
     }
 }
 
 QList<KoShape*> KoShapeManager::shapes() const
 {
     QMutexLocker l(&d->shapesMutex);
 
     return d->shapes;
 }
 
 QList<KoShape*> KoShapeManager::topLevelShapes() const
 {
     QMutexLocker l(&d->shapesMutex);
 
     QList<KoShape*> shapes;
     // get all toplevel shapes
     Q_FOREACH (KoShape *shape, d->shapes) {
         if (!shape->parent() || dynamic_cast<KoShapeLayer*>(shape->parent())) {
             shapes.append(shape);
         }
     }
     return shapes;
 }
 
 KoSelection *KoShapeManager::selection() const
 {
     return d->selection;
 }
 
 void KoShapeManager::explicitlyIssueShapeChangedSignals()
 {
     d->updateTree();
 }
 
 KoCanvasBase *KoShapeManager::canvas()
 {
     return d->canvas;
 }
 
 //have to include this because of Q_PRIVATE_SLOT
 #include "moc_KoShapeManager.cpp"