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/*
Copyright (C) 2010 Casey Link <unnamedrambler@gmail.com>

This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

This library 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 Library General Public
License for more details.

You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#ifndef IMAGEMODEL_H
#define IMAGEMODEL_H

#include <QAbstractTableModel>
#include <QImage>
class QBitArray;
class ImageModel : public QAbstractTableModel
{
    Q_OBJECT
public:

    enum ImageRoles {
        IsCurrentDebugRole = Qt::UserRole,
        ContiguousBlocksRole
    };

    explicit ImageModel( QObject *parent = 0 );
    virtual ~ImageModel();

    /**
* Sets the image to expose via the model
* If codel size is not specified, then the model guesses.
*/
    void setImage( const QImage &image, int codel_size = -1 );

    /**
* Sets the current image to a new image.
* All pixels are filled white.
* @param w width of the new image
* @param h height of the new image
*/
    void newImage( int w, int h );
    QImage image() const;

    /**
* Insert the image at the specified x,y coord
*/
    void insertImage( const QImage &image, int x, int y);

    void scaleImage( const QSize & size );
    QSize imageSize() const;

    void setDebuggedPixel( int x, int y );
    void setBreakpoint( int x, int y );

    int rowCount( const QModelIndex &parent = QModelIndex() ) const;
    int columnCount( const QModelIndex &parent = QModelIndex() ) const;

    QVariant data( const QModelIndex &index, int role = Qt::DisplayRole ) const;
    QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;

    bool setData( const QModelIndex& index, const QVariant& value, int role = Qt::EditRole );
signals:
    void pixelChanged( int x, int y, QRgb color );

public slots:
    /*! This is a very bad hack.
headerData() needs to know the current pixel size (IN THE VIEW!) in order
to return a correct SizeHint, otherwise things get screwy.
Note: this pixel information is only used by headerData to return a SizeHint
It does not affect the backend image data at all
*/
    void slotPixelSizeChange( int size );
private:
    void emitNeighborsChanged( int row, int col );
    QString statusString( QModelIndex index ) const;
    quint64 contiguousBlocks( int x, int y ) const;
    QImage autoScale(const QImage& _image, int codel_size);
    QImage mImage;
    int mPixelSize;

    QPoint mDebugPixel;
};

#endif // IMAGEMODEL_H
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