view layer/TimeRulerLayer.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 _TIME_RULER_H_
#define _TIME_RULER_H_

#include "SingleColourLayer.h"

#include <QRect>
#include <QColor>

class View;
class Model;
class QPainter;

class TimeRulerLayer : public SingleColourLayer
{
    Q_OBJECT

public:
    TimeRulerLayer();

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

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

    enum LabelHeight { LabelTop, LabelMiddle, LabelBottom };
    void setLabelHeight(LabelHeight h) { m_labelHeight = h; }
    LabelHeight getLabelHeight() const { return m_labelHeight; }

    virtual bool snapToFeatureFrame(LayerGeometryProvider *, sv_frame_t &, int &, SnapType) const;

    virtual ColourSignificance getLayerColourSignificance() const {
        return ColourIrrelevant;
    }

    virtual bool getValueExtents(double &, double &, bool &, QString &) const {
        return false;
    }

    virtual QString getLayerPresentationName() const;

    virtual int getVerticalScaleWidth(LayerGeometryProvider *, bool, QPainter &) const { return 0; }

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

    void setProperties(const QXmlAttributes &attributes);

    virtual bool canExistWithoutModel() const { return true; }

protected:
    Model *m_model;
    LabelHeight m_labelHeight;

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

    int64_t getMajorTickUSec(LayerGeometryProvider *, bool &quarterTicks) const;
    int getXForUSec(LayerGeometryProvider *, double usec) const;
};

#endif