libs/flake/KoShapeContainer.cpp

/* This file is part of the KDE project
 * Copyright (C) 2006-2010 Thomas Zander <zander@kde.org>
 * Copyright (C) 2007 Jan Hambrecht <jaham@gmx.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
#include "KoShapeContainer.h"
#include "KoShapeContainer_p.h"
#include "KoShapeContainerModel.h"
#include "KoShapeStrokeModel.h"
#include "SimpleShapeContainerModel.h"
#include "KoShapeSavingContext.h"

#include <QPointF>
#include <QPainter>
#include <QPainterPath>

#include "kis_painting_tweaks.h"
#include "kis_assert.h"

KoShapeContainer::Private::Private(KoShapeContainer *q)
    : shapeInterface(q)
    , model(0)
{
}

KoShapeContainer::Private::~Private()
{
    delete model;
}

KoShapeContainer::Private::Private(const KoShapeContainer::Private &rhs, KoShapeContainer *q)
    : shapeInterface(q)
    , model(0)
{
    Q_UNUSED(rhs);
}

KoShapeContainer::KoShapeContainer(KoShapeContainerModel *model)
    : KoShape()
    , d(new Private(this))
{
    d->model = model;
}

KoShapeContainer::KoShapeContainer(const KoShapeContainer &rhs)
    : KoShape(rhs)
    , d(new Private(*(rhs.d.data()), this))
{
}

KoShapeContainer::~KoShapeContainer()
{
    if (d->model) {
        d->model->deleteOwnedShapes();
    }
}

void KoShapeContainer::addShape(KoShape *shape)
{
    shape->setParent(this);
}

void KoShapeContainer::removeShape(KoShape *shape)
{
    shape->setParent(0);
}

int KoShapeContainer::shapeCount() const
{
    if (d->model == 0)
        return 0;
    return d->model->count();
}

void KoShapeContainer::setClipped(const KoShape *child, bool clipping)
{
    if (d->model == 0)
        return;
    d->model->setClipped(child, clipping);
}

void KoShapeContainer::setInheritsTransform(const KoShape *shape, bool inherit)
{
    if (d->model == 0)
        return;
    d->model->setInheritsTransform(shape, inherit);
}

bool KoShapeContainer::inheritsTransform(const KoShape *shape) const
{
    if (d->model == 0)
        return false;
    return d->model->inheritsTransform(shape);
}

void KoShapeContainer::paint(QPainter &painter, KoShapePaintingContext &paintcontext) const
{
    // Shape container paints only its internal component part. All the children are rendered
    // by the shape manager itself

    painter.save();
    paintComponent(painter, paintcontext);
    painter.restore();
}

void KoShapeContainer::shapeChanged(ChangeType type, KoShape* shape)
{
    Q_UNUSED(shape);
    if (d->model == 0)
        return;
    if (!(type == RotationChanged || type == ScaleChanged || type == ShearChanged
          || type == SizeChanged || type == PositionChanged || type == GenericMatrixChange))
        return;
    d->model->containerChanged(this, type);
    Q_FOREACH (KoShape *shape, d->model->shapes())
        shape->notifyChanged();
}

bool KoShapeContainer::isClipped(const KoShape *child) const
{
    if (d->model == 0) // throw exception??
        return false;
    return d->model->isClipped(child);
}

void KoShapeContainer::update() const
{
    KoShape::update();
    if (d->model)
        Q_FOREACH (KoShape *shape, d->model->shapes())
            shape->update();
}

QList<KoShape*> KoShapeContainer::shapes() const
{
    if (d->model == 0)
        return QList<KoShape*>();

    return d->model->shapes();
}

KoShapeContainerModel *KoShapeContainer::model() const
{
    return d->model;
}

void KoShapeContainer::setModel(KoShapeContainerModel *model)
{
    d->model = model;
}

void KoShapeContainer::setModelInit(KoShapeContainerModel *model)
{
    setModel(model);
    // HACK ALERT: the shapes are copied inside the model,
    //             but we still need to connect the to the
    //             hierarchy here!
    if (d->model) {
        Q_FOREACH (KoShape *shape, d->model->shapes()) {
            if (shape) { // Note: shape can be 0 because not all shapes
                //       implement cloneShape, e.g. the text shape.
                shape->setParent(this);
            }
        }
    }
}

KoShapeContainer::ShapeInterface *KoShapeContainer::shapeInterface()
{
    return &d->shapeInterface;
}

KoShapeContainer::ShapeInterface::ShapeInterface(KoShapeContainer *_q)
    : q(_q)
{
}

void KoShapeContainer::ShapeInterface::addShape(KoShape *shape)
{
    KoShapeContainer::Private * const d = q->d.data();

    KIS_SAFE_ASSERT_RECOVER_RETURN(shape);

    if (shape->parent() == q && q->shapes().contains(shape)) {
        return;
    }

    // TODO add a method to create a default model depending on the shape container
    if (!d->model) {
        d->model = new SimpleShapeContainerModel();
    }

    if (shape->parent() && shape->parent() != q) {
        shape->parent()->shapeInterface()->removeShape(shape);
    }

    d->model->add(shape);
    d->model->shapeHasBeenAddedToHierarchy(shape, q);
}

void KoShapeContainer::ShapeInterface::removeShape(KoShape *shape)
{
    KoShapeContainer::Private * const d = q->d.data();

    KIS_SAFE_ASSERT_RECOVER_RETURN(shape);
    KIS_SAFE_ASSERT_RECOVER_RETURN(d->model);
    KIS_SAFE_ASSERT_RECOVER_RETURN(d->model->shapes().contains(shape));

    d->model->shapeToBeRemovedFromHierarchy(shape, q);
    d->model->remove(shape);

    KoShapeContainer *grandparent = q->parent();
    if (grandparent) {
        grandparent->model()->childChanged(q, KoShape::ChildChanged);
    }
}