KoSelection.cpp

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/* This file is part of the KDE project
 
   SPDX-FileCopyrightText: 2006 Boudewijn Rempt <boud@valdyas.org>
   SPDX-FileCopyrightText: 2006 Thorsten Zachmann <zachmann@kde.org>
   SPDX-FileCopyrightText: 2006 Jan Hambrecht <jaham@gmx.net>
   SPDX-FileCopyrightText: 2006-2007, 2009 Thomas Zander <zander@kde.org>
 
   SPDX-License-Identifier: LGPL-2.0-or-later
*/
 
#include "KoSelection.h"
#include "KoSelection_p.h"
#include "KoShapeContainer.h"
#include "KoShapeGroup.h"
#include "KoPointerEvent.h"
#include "kis_algebra_2d.h"
#include "krita_container_utils.h"
 
#include <QPainter>
 
#include "kis_debug.h"
KoSelection::KoSelection(QObject *parent)
    : QObject(parent)
    , KoShape()
    , d(new Private)
{
    connect(d->selectionChangedCompressor, SIGNAL(timeout()), SIGNAL(selectionChanged()));
}
 
KoSelection::KoSelection(const KoSelection &rhs)
    : QObject()
    , KoShape(rhs)
    , d(rhs.d)
{
}
 
KoSelection::~KoSelection()
{
}
 
void KoSelection::paint(QPainter &painter) const
{
    Q_UNUSED(painter);
}
 
void KoSelection::setSize(const QSizeF &size)
{
    Q_UNUSED(size);
    qWarning() << "WARNING: KoSelection::setSize() should never be used!";
}
 
QSizeF KoSelection::size() const
{
    return outlineRect().size();
}
 
QRectF KoSelection::outlineRect() const
{
    const QTransform invertedTransform = transformation().inverted();
    QRectF boundingRect;
 
    Q_FOREACH (KoShape *shape, selectedVisibleShapes()) {
        // it is cheaper to invert-transform each outline, than
        // to group 300+ rotated rectangles into a polygon
        boundingRect |=
            invertedTransform.map(
                shape->absoluteTransformation().map(
                        QPolygonF(shape->outlineRect()))).boundingRect();
    }
 
    return boundingRect;
}
 
QRectF KoSelection::boundingRect() const
{
    return KoShape::boundingRect(selectedVisibleShapes());
}
 
void KoSelection::select(KoShape *shape)
{
    KIS_SAFE_ASSERT_RECOVER_RETURN(shape != this);
    KIS_SAFE_ASSERT_RECOVER_RETURN(shape);
 
    if (!shape->isSelectable() || !shape->isVisible()) {
        return;
    }
 
    // check recursively
    if (isSelected(shape)) {
        return;
    }
 
    // find the topmost parent to select
    while (KoShapeGroup *parentGroup = dynamic_cast<KoShapeGroup*>(shape->parent())) {
        if (parentGroup && parentGroup->isSelectable()) {
            shape = parentGroup;
        } else {
            break;
        }
    }
 
    d->selectedShapes << shape;
    shape->addShapeChangeListener(this);
 
    if (d->selectedShapes.size() == 1) {
        setTransformation(shape->absoluteTransformation());
    } else {
        setTransformation(QTransform());
    }
 
    d->selectionChangedCompressor->start();
}
 
void KoSelection::deselect(KoShape *shape)
{
    if (!d->selectedShapes.contains(shape))
        return;
 
    d->selectedShapes.removeAll(shape);
    shape->removeShapeChangeListener(this);
 
    if (d->selectedShapes.size() == 1) {
        setTransformation(d->selectedShapes.first()->absoluteTransformation());
    }
 
    d->selectionChangedCompressor->start();
}
 
void KoSelection::deselectAll()
{
 
    if (d->selectedShapes.isEmpty())
        return;
 
    Q_FOREACH (KoShape *shape, d->selectedShapes) {
        shape->removeShapeChangeListener(this);
    }
 
    // reset the transformation matrix of the selection
    setTransformation(QTransform());
 
    d->selectedShapes.clear();
    d->selectionChangedCompressor->start();
}
 
int KoSelection::count() const
{
    return d->selectedShapes.size();
}
 
bool KoSelection::hitTest(const QPointF &position) const
{
 
    Q_FOREACH (KoShape *shape, d->selectedShapes) {
        if (shape->isVisible()) continue;
        if (shape->hitTest(position)) return true;
    }
 
    return false;
}
 
const QList<KoShape*> KoSelection::selectedShapes() const
{
    return d->selectedShapes;
}
 
const QList<KoShape *> KoSelection::selectedVisibleShapes() const
{
    QList<KoShape*> shapes = selectedShapes();
 
    KritaUtils::filterContainer (shapes, [](KoShape *shape) {
        return shape->isVisible();
    });
 
    return shapes;
}
 
const QList<KoShape *> KoSelection::selectedEditableShapes() const
{
    QList<KoShape*> shapes = selectedShapes();
 
    KritaUtils::filterContainer (shapes, [](KoShape *shape) {
        return shape->isShapeEditable();
    });
 
    return shapes;
}
 
const QList<KoShape *> KoSelection::selectedEditableShapesAndDelegates() const
{
    QList<KoShape*> shapes;
    Q_FOREACH (KoShape *shape, selectedShapes()) {
        QSet<KoShape *> delegates = shape->toolDelegates();
        if (delegates.isEmpty()) {
            shapes.append(shape);
        } else {
            Q_FOREACH (KoShape *delegatedShape, delegates) {
                shapes.append(delegatedShape);
            }
        }
    }
    return shapes;
}
 
bool KoSelection::isSelected(const KoShape *shape) const
{
    if (shape == this)
        return true;
 
    const KoShape *tmpShape = shape;
    while (tmpShape && std::find(d->selectedShapes.begin(), d->selectedShapes.end(), tmpShape) == d->selectedShapes.end()) {
        tmpShape = tmpShape->parent();
    }
 
    return tmpShape;
}
 
KoShape *KoSelection::firstSelectedShape() const
{
    return !d->selectedShapes.isEmpty() ? d->selectedShapes.first() : 0;
}
 
void KoSelection::setActiveLayer(KoShapeLayer *layer)
{
    d->activeLayer = layer;
    Q_EMIT currentLayerChanged(layer);
}
 
KoShapeLayer* KoSelection::activeLayer() const
{
    return d->activeLayer;
}
 
void KoSelection::notifyShapeChanged(KoShape::ChangeType type, KoShape *shape)
{
    Q_UNUSED(shape);
    if (type == KoShape::Deleted) {
        deselect(shape);
 
        // HACK ALERT: the caller will also remove the listener, which was
        // removed in deselect(), so re-add it here
        shape->addShapeChangeListener(this);
    }
}