view layer/NoteLayer.h @ 1386:fc3d89f88690 spectrogramparam

Use log-frequency rather than log-bin for calculating x coord in spectrum. This has the advantage that frequency positions don't move when we change the window size or oversampling ratio, but it does give us an unhelpfully large amount of space for very low frequencies - to be considered

/* -*- 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 Chris Cannam.
    
    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 SV_NOTE_LAYER_H
#define SV_NOTE_LAYER_H

#include "SingleColourLayer.h"
#include "VerticalScaleLayer.h"

#include "data/model/NoteModel.h"

#include <QObject>
#include <QColor>

class View;
class QPainter;

class NoteLayer : public SingleColourLayer,
                  public VerticalScaleLayer
{
    Q_OBJECT

public:
    NoteLayer();

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

    virtual int getVerticalScaleWidth(LayerGeometryProvider *v, bool, QPainter &) const;
    virtual void paintVerticalScale(LayerGeometryProvider *v, bool, QPainter &paint, QRect rect) const;

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

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

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

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

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

    virtual bool editOpen(LayerGeometryProvider *v, QMouseEvent *);

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

    virtual void copy(LayerGeometryProvider *v, Selection s, Clipboard &to);
    virtual bool paste(LayerGeometryProvider *v, const Clipboard &from, sv_frame_t frameOffset,
                       bool interactive);

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

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

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

    virtual bool isLayerScrollable(const LayerGeometryProvider *v) const;

    virtual bool isLayerEditable() const { return true; }

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

    virtual bool getValueExtents(double &min, double &max,
                                 bool &log, QString &unit) const;

    virtual bool getDisplayExtents(double &min, double &max) const;
    virtual bool setDisplayExtents(double min, double max);

    virtual int getVerticalZoomSteps(int &defaultStep) const;
    virtual int getCurrentVerticalZoomStep() const;
    virtual void setVerticalZoomStep(int);
    virtual RangeMapper *getNewVerticalZoomRangeMapper() const;

    /**
     * Add a note-on.  Used when recording MIDI "live".  The note will
     * not be finally added to the layer until the corresponding
     * note-off.
     */
    void addNoteOn(sv_frame_t frame, int pitch, int velocity);
    
    /**
     * Add a note-off.  This will cause a note to appear, if and only
     * if there is a matching pending note-on.
     */
    void addNoteOff(sv_frame_t frame, int pitch);

    /**
     * Abandon all pending note-on events.
     */
    void abandonNoteOns();

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

    void setProperties(const QXmlAttributes &attributes);

    /// VerticalScaleLayer methods
    virtual int getYForValue(LayerGeometryProvider *v, double value) const;
    virtual double getValueForY(LayerGeometryProvider *v, int y) const;
    virtual QString getScaleUnits() const;

protected:
    void getScaleExtents(LayerGeometryProvider *, double &min, double &max, bool &log) const;
    bool shouldConvertMIDIToHz() const;

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

    NoteModel::PointList getLocalPoints(LayerGeometryProvider *v, int) const;

    bool getPointToDrag(LayerGeometryProvider *v, int x, int y, NoteModel::Point &) const;

    NoteModel *m_model;
    bool m_editing;
    int m_dragPointX;
    int m_dragPointY;
    int m_dragStartX;
    int m_dragStartY;
    NoteModel::Point m_originalPoint;
    NoteModel::Point m_editingPoint;
    NoteModel::EditCommand *m_editingCommand;
    VerticalScale m_verticalScale;

    typedef std::set<NoteModel::Point, NoteModel::Point::Comparator> NoteSet;
    NoteSet m_pendingNoteOns;

    mutable double m_scaleMinimum;
    mutable double m_scaleMaximum;

    bool shouldAutoAlign() const;

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

#endif