/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Design Tooling
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#pragma once

#include "keyframeitem.h"

#include <QElapsedTimer>
#include <QGraphicsScene>

namespace QmlDesigner {

class AnimationCurve;
class CurveItem;
class GraphicsView;

class GraphicsScene : public QGraphicsScene
{
    Q_OBJECT

signals:
    void curveChanged(unsigned int id, const AnimationCurve &curve);

public:
    GraphicsScene(QObject *parent = nullptr);

    ~GraphicsScene() override;

    bool empty() const;

    bool hasActiveKeyframe() const;

    bool hasActiveHandle() const;

    bool hasActiveItem() const;

    bool hasSelectedKeyframe() const;

    bool hasEditableSegment(double time) const;

    double minimumTime() const;

    double maximumTime() const;

    double minimumValue() const;

    double maximumValue() const;

    double animationRangeMin() const;

    double animationRangeMax() const;

    QRectF rect() const;

    QVector<CurveItem *> curves() const;

    QVector<CurveItem *> selectedCurves() const;

    QVector<KeyframeItem *> keyframes() const;

    QVector<KeyframeItem *> selectedKeyframes() const;

    QVector<HandleItem *> handles() const;

    CurveItem *findCurve(unsigned int id) const;

    SelectableItem *intersect(const QPointF &pos) const;

    void setDirty(bool dirty);

    void reset();

    void deleteSelectedKeyframes();

    void insertKeyframe(double time, bool all = false);

    void doNotMoveItems(bool tmp);

    void removeCurveItem(unsigned int id);

    void addCurveItem(CurveItem *item);

    void moveToBottom(CurveItem *item);

    void moveToTop(CurveItem *item);

    void setComponentTransform(const QTransform &transform);

    void keyframeMoved(KeyframeItem *item, const QPointF &direction);

    void handleUnderMouse(HandleItem *handle);

    void handleMoved(KeyframeItem *frame, HandleItem::Slot slot, double angle, double deltaLength);

    void setPinned(uint id, bool pinned);

    std::vector<CurveItem *> takePinnedItems();

protected:
    void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent) override;

    void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent) override;

    void focusOutEvent(QFocusEvent *focusEvent) override;

    void focusInEvent(QFocusEvent *focusEvent) override;

private:
    using QGraphicsScene::addItem;

    using QGraphicsScene::clear;

    using QGraphicsScene::removeItem;

    GraphicsView *graphicsView() const;

    QRectF limits() const;

    void resetZValues();

    QVector<CurveItem *> m_curves;

    mutable bool m_dirty;

    mutable QRectF m_limits;

    bool m_doNotMoveItems;

    QElapsedTimer m_usageTimer;
};

} // End namespace QmlDesigner.
