view layer/TimeValueLayer.h @ 1551:e79731086b0f

Fixes to NoteLayer, particularly to calculation of vertical scale when model unit is not Hz. To avoid inconsistency we now behave as if the unit is always Hz from the point of view of the external API and display, converting at the point where we obtain values from the events themselves. Also various fixes to editing.

/* -*- 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_TIME_VALUE_LAYER_H
#define SV_TIME_VALUE_LAYER_H

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

#include "data/model/SparseTimeValueModel.h"

#include <QObject>
#include <QColor>

class View;
class QPainter;

class TimeValueLayer : public SingleColourLayer, 
                       public VerticalScaleLayer, 
                       public ColourScaleLayer
{
    Q_OBJECT

public:
    TimeValueLayer();

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

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

    QString getFeatureDescription(LayerGeometryProvider *v, QPoint &) const override;
    QString getLabelPreceding(sv_frame_t) const override;

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

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

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

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

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

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

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

    ModelId getModel() const override { return m_model; }
    void setModel(ModelId model); // a SparseTimeValueModel

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

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

    enum PlotStyle {
        PlotPoints,
        PlotStems,
        PlotConnectedPoints,
        PlotLines,
        PlotCurve,
        PlotSegmentation,
        PlotDiscreteCurves
    };

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

    enum VerticalScale {
        AutoAlignScale,
        LinearScale,
        LogScale,
        PlusMinusOneScale
    };
    
    void setVerticalScale(VerticalScale scale);
    VerticalScale getVerticalScale() const { return m_verticalScale; }

    void setDrawSegmentDivisions(bool);
    bool getDrawSegmentDivisions() const { return m_drawSegmentDivisions; }

    void setShowDerivative(bool);
    bool getShowDerivative() const { return m_derivative; }

    bool isLayerScrollable(const LayerGeometryProvider *v) const override;

    bool isLayerEditable() const override { return true; }

    int getCompletion(LayerGeometryProvider *) const override;

    bool needsTextLabelHeight() const override;

    bool getValueExtents(double &min, double &max,
                                 bool &logarithmic, QString &unit) const override;

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

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

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

    void setProperties(const QXmlAttributes &attributes) override;

    /// Override from SingleColourLayer
    ColourSignificance getLayerColourSignificance() const override {
        if (m_plotStyle == PlotSegmentation) {
            return ColourHasMeaningfulValue;
        } else {
            return ColourDistinguishes;
        }
    }

    /// Override from SingleColourLayer
    bool hasLightBackground() const override {
        if (m_plotStyle == PlotSegmentation) {
            return true;
        } else {
            return SingleColourLayer::hasLightBackground();
        }
    }

    /// VerticalScaleLayer and ColourScaleLayer methods
    int getYForValue(LayerGeometryProvider *, double value) const override;
    double getValueForY(LayerGeometryProvider *, int y) const override;
    QString getScaleUnits() const override;
    QColor getColourForValue(LayerGeometryProvider *v, double value) const override;

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

    EventVector getLocalPoints(LayerGeometryProvider *v, int) const;

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

    ModelId m_model;
    bool m_editing;
    Event m_originalPoint;
    Event m_editingPoint;
    ChangeEventsCommand *m_editingCommand;
    int m_colourMap;
    bool m_colourInverted;
    PlotStyle m_plotStyle;
    VerticalScale m_verticalScale;
    bool m_drawSegmentDivisions;
    bool m_derivative;

    mutable double m_scaleMinimum;
    mutable double m_scaleMaximum;

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

#endif