NodalScene.h

/*
 * Copyright 2020-2021 Benoit Pelletier
 *
 * This file is part of Sound Generator.
 *
 * Sound Generator is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Sound Generator 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Sound Generator.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

#ifndef NODALSCENE_H
#define NODALSCENE_H

#include <QGraphicsScene>

class NodeItem;
class LinkItem;
class QUndoStack;
class AudioSettings;

class NodalScene : public QGraphicsScene
{
    Q_OBJECT

public:
    NodalScene(QObject* parent = nullptr);
    virtual ~NodalScene() override;

    NodeItem* createComponent(QString _componentName, qreal _width = 200.0);
    NodeItem* createPassThrough(LinkItem* _link);
    void addNodeItem(NodeItem *_item);
    void removeNodeItem(NodeItem* _item);

    void save(QString fileName, const AudioSettings& settings);
    void load(QString fileName, AudioSettings& settings);

    int clearItems(int from = 0);
    void reset();

    inline NodeItem* getOutput() { return m_nodeList[0]; }
    inline void setCreationPosition(QPointF position) { m_creationPosition = position; }
    inline void setContextPosition(QPointF position) { m_contextPosition = position; }
    inline void isContextMenu(bool value) { m_isContextMenu = value; }

public slots:
    int deleteSelection();
    void selectAll();
    void deselectAll();
    void copyComponents();
    void pasteComponents();
    void undoCommand();
    void redoCommand();
    void setDirty() { emit dirtyChanged(); }

signals:
    void dirtyChanged();

protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;

private:
    NodeItem *createNode(QString componentName, qreal width = 200.0);

private:
    QPointF m_creationPosition;
    QPointF m_nextPastePosition;
    QPointF m_contextPosition;
    QVector<NodeItem*> m_nodeList;
    bool m_isContextMenu;
    QUndoStack* m_undoStack;

    QList<QGraphicsItem*> m_movingItems;
    QList<QPointF> m_movingItemPositions;
    QList<QGraphicsItem*> m_previousSelectedItems;

};

#endif // NODALSCENE_H