view layer/RegionLayer.h @ 473:4f4f943bfdfc

* Merge from one-fftdataserver-per-fftmodel branch.  This bit of
reworking (which is not described very accurately by the title of
the branch) turns the MatrixFile object into something that either
reads or writes, but not both, and separates the FFT file cache
reader and writer implementations separately.  This allows the
FFT data server to have a single thread owning writers and one reader
per "customer" thread, and for all locking to be vastly simplified
and concentrated in the data server alone (because none of the
classes it makes use of is used in more than one thread at a time).
The result is faster and more trustworthy code.

/* -*- 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 2006-2008 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 _REGION_LAYER_H_
#define _REGION_LAYER_H_

#include "SingleColourLayer.h"
#include "data/model/RegionModel.h"

#include <QObject>
#include <QColor>

#include <map>

class View;
class QPainter;

class RegionLayer : public SingleColourLayer
{
    Q_OBJECT

public:
    RegionLayer();

    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 eraseStart(View *v, QMouseEvent *);
    virtual void eraseDrag(View *v, QMouseEvent *);
    virtual void eraseEnd(View *v, QMouseEvent *);

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

    virtual bool editOpen(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(View *v, Selection s, Clipboard &to);
    virtual bool paste(View *v, const Clipboard &from, int frameOffset,
                       bool interactive);

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

    virtual PropertyList getProperties() const;
    virtual QString getPropertyLabel(const PropertyName &) const;
    virtual PropertyType getPropertyType(const PropertyName &) const;
    virtual QString getPropertyGroupName(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);

    void setFillColourMap(int);
    int getFillColourMap() const { return m_colourMap; }

    enum VerticalScale {
        AutoAlignScale,
        EqualSpaced,
        LinearScale,
        LogScale,
    };

    void setVerticalScale(VerticalScale scale);
    VerticalScale getVerticalScale() const { return m_verticalScale; }

    enum PlotStyle {
	PlotLines,
	PlotSegmentation
    };

    void setPlotStyle(PlotStyle style);
    PlotStyle getPlotStyle() const { return m_plotStyle; }

    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 &log, QString &unit) const;

    virtual bool getDisplayExtents(float &min, float &max) const;

    virtual void toXml(QTextStream &stream, QString indent = "",
                       QString extraAttributes = "") const;

    void setProperties(const QXmlAttributes &attributes);

protected slots:
    void recalcSpacing();

protected:
    void getScaleExtents(View *, float &min, float &max, bool &log) const;
    int getYForValue(View *v, float value) const;
    float getValueForY(View *v, int y) const;
    QColor getColourForValue(View *v, float value) const;

    virtual int getDefaultColourHint(bool dark, bool &impose);

    RegionModel::PointList getLocalPoints(View *v, int) const;

    RegionModel *m_model;
    bool m_editing;
    RegionModel::Point m_originalPoint;
    RegionModel::Point m_editingPoint;
    RegionModel::EditCommand *m_editingCommand;
    VerticalScale m_verticalScale;
    int m_colourMap;
    PlotStyle m_plotStyle;

    typedef std::map<float, int> SpacingMap;
    SpacingMap m_spacingMap;

    void finish(RegionModel::EditCommand *command) {
        Command *c = command->finish();
        if (c) CommandHistory::getInstance()->addCommand(c, false);
    }
};

#endif