view layer/TimeValueLayer.h @ 561:aced8ec09bc8

* Complete the overhaul of CSV file import; now you can pick the purpose for
  each column in the file, and SV should do the rest.  The most significant
  practical improvement here is that we can now handle files in which time
  and duration do not necessarily appear in known columns.

/* -*- 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_VALUE_LAYER_H_
#define _TIME_VALUE_LAYER_H_

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

#include <QObject>
#include <QColor>

class View;
class QPainter;

class TimeValueLayer : public SingleColourLayer
{
    Q_OBJECT

public:
    TimeValueLayer();

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

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

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

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

    virtual PropertyList getProperties() const;
    virtual QString getPropertyLabel(const PropertyName &) const;
    virtual QString getPropertyIconName(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 PlotStyle {
	PlotPoints,
	PlotStems,
	PlotConnectedPoints,
	PlotLines,
	PlotCurve,
	PlotSegmentation
    };

    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; }

    virtual bool isLayerScrollable(const View *v) const;

    virtual bool isLayerEditable() const { return true; }

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

    virtual bool needsTextLabelHeight() const {
        return m_plotStyle == PlotSegmentation && m_model->hasTextLabels();
    }

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

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

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

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

    void setProperties(const QXmlAttributes &attributes);

    virtual ColourSignificance getLayerColourSignificance() const {
        if (m_plotStyle == PlotSegmentation) {
            return ColourHasMeaningfulValue;
        } else {
            return ColourDistinguishes;
        }
    }

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

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

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

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

    mutable float m_scaleMinimum;
    mutable float m_scaleMaximum;

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

#endif