view layer/ImageLayer.h @ 303:46faec7aae12

* Phase 1 of an image layer.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006-2007 Chris Cannam and QMUL.
    
    This program 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 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _IMAGE_LAYER_H_
#define _IMAGE_LAYER_H_

#include "Layer.h"
#include "data/model/ImageModel.h"

#include <QObject>
#include <QColor>
#include <QImage>

#include <map>

class View;
class QPainter;

class ImageLayer : public Layer
{
    Q_OBJECT

public:
    ImageLayer();

    virtual void paint(View *v, QPainter &paint, QRect rect) const;

    virtual QString getFeatureDescription(View *v, QPoint &) const;

    virtual bool snapToFeatureFrame(View *v, int &frame,
				    size_t &resolution,
				    SnapType snap) const;

    virtual void drawStart(View *v, QMouseEvent *);
    virtual void drawDrag(View *v, QMouseEvent *);
    virtual void drawEnd(View *v, QMouseEvent *);

    virtual void editStart(View *v, QMouseEvent *);
    virtual void editDrag(View *v, QMouseEvent *);
    virtual void editEnd(View *v, QMouseEvent *);

    virtual void moveSelection(Selection s, size_t newStartFrame);
    virtual void resizeSelection(Selection s, Selection newSize);
    virtual void deleteSelection(Selection s);

    virtual void copy(Selection s, Clipboard &to);
    virtual bool paste(const Clipboard &from, int frameOffset,
                       bool interactive);

    virtual bool editOpen(View *, QMouseEvent *); // on double-click

    virtual const Model *getModel() const { return m_model; }
    void setModel(ImageModel *model);

    virtual PropertyList getProperties() const;
    virtual QString getPropertyLabel(const PropertyName &) const;
    virtual PropertyType getPropertyType(const PropertyName &) const;
    virtual int getPropertyRangeAndValue(const PropertyName &,
                                         int *min, int *max, int *deflt) const;
    virtual QString getPropertyValueLabel(const PropertyName &,
					  int value) const;
    virtual void setProperty(const PropertyName &, int value);

    virtual ColourSignificance getLayerColourSignificance() const {
        return ColourAbsent;
    }

    virtual bool isLayerScrollable(const View *v) const;

    virtual bool isLayerEditable() const { return true; }

    virtual int getCompletion(View *) const { return m_model->getCompletion(); }

    virtual bool getValueExtents(float &min, float &max,
                                 bool &logarithmic, QString &unit) const;

    virtual QString toXmlString(QString indent = "",
				QString extraAttributes = "") const;

    virtual void setLayerDormant(const View *v, bool dormant);

    void setProperties(const QXmlAttributes &attributes);

protected:
    ImageModel::PointList getLocalPoints(View *v, int x, int y) const;

    float getImageAspect(QString name) const;
    QImage getImage(View *v, QString name, QSize maxSize) const;

    //!!! how to reap no-longer-used images?

    typedef std::map<QString, QImage> ImageMap;
    typedef std::map<const View *, ImageMap> ViewImageMap;

    static ImageMap m_images;
    mutable ViewImageMap m_scaled;

    ImageModel *m_model;
    bool m_editing;
    QPoint m_editOrigin;
    ImageModel::Point m_originalPoint;
    ImageModel::Point m_editingPoint;
    ImageModel::EditCommand *m_editingCommand;
};

#endif