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** This file is part of Qt 3D Studio.
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#ifndef ROWMOVER_H
#define ROWMOVER_H

#include "TimelineConstants.h"
#include "TimelineItem.h"
#include "DocumentEditorEnumerations.h"
#include "StudioObjectTypes.h"
#include <QtCore/qtimer.h>

class RowTree;
class TimelineGraphicsScene;

class RowMover : public TimelineItem
{
public:
    RowMover(TimelineGraphicsScene *m_scene);
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
               QWidget *widget = nullptr) override;

    void start(const QVector<RowTree *> &rows);
    void end(bool force = false);
    void updateTargetRow(const QPointF &scenePos, EStudioObjectType rowType = OBJTYPE_UNKNOWN);
    bool isActive();
    RowTree *insertionTarget() const;
    RowTree *insertionParent() const;
    QVector<RowTree *> sourceRows() const;
    int type() const;
    Q3DStudio::DocumentEditorInsertType::Enum insertionType() const;

private:
    void updateState(int depth, double y);
    void resetInsertionParent(RowTree *newParent = nullptr);
    RowTree *getRowAtPos(const QPointF &scenePos);
    bool isSourceRowsDescendant(RowTree *row) const;
    bool sourceRowsHasMaster() const;
    bool isNextSiblingRow(RowTree *r1, RowTree *r2) const;

    TimelineGraphicsScene *m_scene = nullptr;
    RowTree *m_insertionTarget = nullptr; // insertion target
    RowTree *m_insertionParent = nullptr; // insertion parent
    RowTree *m_rowAutoExpand = nullptr;
    QVector<RowTree *> m_sourceRows;      // dragged rows
    bool m_active = false;
    Q3DStudio::DocumentEditorInsertType::Enum m_insertType =
            Q3DStudio::DocumentEditorInsertType::Unknown;
    QTimer m_autoExpandTimer;
    std::function<void()> updateTargetRowLater = {};
};

#endif // ROWMOVER_H