//=============================================================================
//  MusE Reader
//  Linux Music Score Reader
//
//  Copyright (C) 2010 Werner Schweer
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License version 2.
//
//  This program 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 this program; if not, write to the Free Software
//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================

#ifndef __SCAN_VIEW_H__
#define __SCAN_VIEW_H__

namespace Ms {
class Omr;
class Page;
class ScoreView;
class OmrPage;

//---------------------------------------------------------
//   Tile
//---------------------------------------------------------

struct Tile {
    int no;
    QRect r;
    QPixmap pm;
    OmrPage* page;
    int pageNo;

    Tile();
};

static const int TILE_H = 512;
static const int TILE_W = 512;

//---------------------------------------------------------
//   OmrView
//---------------------------------------------------------

class OmrView : public QWidget
{
    Q_OBJECT
    Omr * _omr;
    ScoreView* _scoreView;
    int maxTiles;

    QList<Tile*> usedTiles;
    QStack<Tile*> freeTiles;
    QPoint startDrag;

    QTransform _matrix;
    int xoff, yoff;
    int pageWidth;

    bool _fotoMode;
    QRectF _foto;

    bool _showLines;
    bool _showBarlines;
    bool _showSlices;
    bool _showStaves;

    void zoom(int step, const QPoint& pos);

    virtual void mousePressEvent(QMouseEvent*);
    virtual void mouseMoveEvent(QMouseEvent*);
    virtual void wheelEvent(QWheelEvent*);
    virtual void paintEvent(QPaintEvent*);
    virtual void contextMenuEvent(QContextMenuEvent*);

    qreal mag() const { return _matrix.m11(); }
    void setMag(double mag);
    void initTile(Tile* t);

public slots:
    void setScale(double);
    void setOffset(double, double);

signals:
    void pageNumberChanged(int);
    void xPosChanged(int);
    void yPosChanged(int);

public:
    OmrView(ScoreView*, QWidget* parent = 0);
    void setOmr(Omr*);
    Omr* omr() const { return _omr; }
    bool fotoMode() const { return _fotoMode; }
    void setFotoMode(bool val) { _fotoMode = val; }

    void setShowLines(bool val) { _showLines = val; }
    bool showLines() const { return _showLines; }
    bool showBarlines() const { return _showBarlines; }
    bool showSlices() const { return _showSlices; }
    bool showStaves() const { return _showStaves; }
    void setShowBarlines(bool val);
    void setShowSlices(bool val);
    void setShowStaves(bool val);
};
}

#endif