annotate layer/NoteLayer.cpp @ 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.
*/

#include "NoteLayer.h"

#include "data/model/Model.h"
#include "base/RealTime.h"
#include "base/Profiler.h"
#include "base/Pitch.h"
#include "base/LogRange.h"
#include "base/RangeMapper.h"
#include "ColourDatabase.h"
#include "view/View.h"

#include "data/model/NoteModel.h"

#include "widgets/ItemEditDialog.h"

#include <QPainter>
#include <QPainterPath>
#include <QMouseEvent>
#include <QTextStream>
#include <QMessageBox>

#include <iostream>
#include <cmath>
#include <utility>

NoteLayer::NoteLayer() :
    SingleColourLayer(),
    m_model(0),
    m_editing(false),
    m_originalPoint(0, 0.0, 0, 1.f, tr("New Point")),
    m_editingPoint(0, 0.0, 0, 1.f, tr("New Point")),
    m_editingCommand(0),
    m_verticalScale(AutoAlignScale),
    m_scaleMinimum(0),
    m_scaleMaximum(0)
{
    
}

void
NoteLayer::setModel(NoteModel *model)
{
    if (m_model == model) return;
    m_model = model;

    connectSignals(m_model);

//    std::cerr << "NoteLayer::setModel(" << model << ")" << std::endl;

    m_scaleMinimum = 0;
    m_scaleMaximum = 0;

    emit modelReplaced();
}

Layer::PropertyList
NoteLayer::getProperties() const
{
    PropertyList list = SingleColourLayer::getProperties();
    list.push_back("Vertical Scale");
    list.push_back("Scale Units");
    return list;
}

QString
NoteLayer::getPropertyLabel(const PropertyName &name) const
{
    if (name == "Vertical Scale") return tr("Vertical Scale");
    if (name == "Scale Units") return tr("Scale Units");
    return SingleColourLayer::getPropertyLabel(name);
}

Layer::PropertyType
NoteLayer::getPropertyType(const PropertyName &name) const
{
    if (name == "Scale Units") return UnitsProperty;
    if (name == "Vertical Scale") return ValueProperty;
    return SingleColourLayer::getPropertyType(name);
}

QString
NoteLayer::getPropertyGroupName(const PropertyName &name) const
{
    if (name == "Vertical Scale" || name == "Scale Units") {
        return tr("Scale");
    }
    return SingleColourLayer::getPropertyGroupName(name);
}

int
NoteLayer::getPropertyRangeAndValue(const PropertyName &name,
                                    int *min, int *max, int *deflt) const
{
    int val = 0;

    if (name == "Vertical Scale") {
	
	if (min) *min = 0;
	if (max) *max = 3;
        if (deflt) *deflt = int(AutoAlignScale);
	
	val = int(m_verticalScale);

    } else if (name == "Scale Units") {

        if (deflt) *deflt = 0;
        if (m_model) {
            val = UnitDatabase::getInstance()->getUnitId
                (m_model->getScaleUnits());
        }

    } else {

	val = SingleColourLayer::getPropertyRangeAndValue(name, min, max, deflt);
    }

    return val;
}

QString
NoteLayer::getPropertyValueLabel(const PropertyName &name,
                                 int value) const
{
    if (name == "Vertical Scale") {
	switch (value) {
	default:
	case 0: return tr("Auto-Align");
	case 1: return tr("Linear");
	case 2: return tr("Log");
	case 3: return tr("MIDI Notes");
	}
    }
    return SingleColourLayer::getPropertyValueLabel(name, value);
}

void
NoteLayer::setProperty(const PropertyName &name, int value)
{
    if (name == "Vertical Scale") {
	setVerticalScale(VerticalScale(value));
    } else if (name == "Scale Units") {
        if (m_model) {
            m_model->setScaleUnits
                (UnitDatabase::getInstance()->getUnitById(value));
            emit modelChanged();
        }
    } else {
        return SingleColourLayer::setProperty(name, value);
    }
}

void
NoteLayer::setVerticalScale(VerticalScale scale)
{
    if (m_verticalScale == scale) return;
    m_verticalScale = scale;
    emit layerParametersChanged();
}

bool
NoteLayer::isLayerScrollable(const View *v) const
{
    QPoint discard;
    return !v->shouldIlluminateLocalFeatures(this, discard);
}

bool
NoteLayer::shouldConvertMIDIToHz() const
{
    QString unit = m_model->getScaleUnits();
    return (unit != "Hz");
//    if (unit == "" ||
//        unit.startsWith("MIDI") ||
//        unit.startsWith("midi")) return true;
//    return false;
}

bool
NoteLayer::getValueExtents(float &min, float &max,
                           bool &logarithmic, QString &unit) const
{
    if (!m_model) return false;
    min = m_model->getValueMinimum();
    max = m_model->getValueMaximum();

    if (shouldConvertMIDIToHz()) {
        unit = "Hz";
        min = Pitch::getFrequencyForPitch(lrintf(min));
        max = Pitch::getFrequencyForPitch(lrintf(max + 1));
    } else unit = m_model->getScaleUnits();

    if (m_verticalScale == MIDIRangeScale ||
        m_verticalScale == LogScale) logarithmic = true;

    return true;
}

bool
NoteLayer::getDisplayExtents(float &min, float &max) const
{
    if (!m_model || shouldAutoAlign()) return false;

    if (m_verticalScale == MIDIRangeScale) {
        min = Pitch::getFrequencyForPitch(0);
        max = Pitch::getFrequencyForPitch(127);
        return true;
    }

    if (m_scaleMinimum == m_scaleMaximum) {
        min = m_model->getValueMinimum();
        max = m_model->getValueMaximum();
    } else {
        min = m_scaleMinimum;
        max = m_scaleMaximum;
    }

    if (shouldConvertMIDIToHz()) {
        min = Pitch::getFrequencyForPitch(lrintf(min));
        max = Pitch::getFrequencyForPitch(lrintf(max + 1));
    }

    return true;
}

bool
NoteLayer::setDisplayExtents(float min, float max)
{
    if (!m_model) return false;

    if (min == max) {
        if (min == 0.f) {
            max = 1.f;
        } else {
            max = min * 1.0001;
        }
    }

    m_scaleMinimum = min;
    m_scaleMaximum = max;

//    std::cerr << "NoteLayer::setDisplayExtents: min = " << min << ", max = " << max << std::endl;
    
    emit layerParametersChanged();
    return true;
}

int
NoteLayer::getVerticalZoomSteps(int &defaultStep) const
{
    if (shouldAutoAlign()) return 0;
    if (!m_model) return 0;

    defaultStep = 0;
    return 100;
}

int
NoteLayer::getCurrentVerticalZoomStep() const
{
    if (shouldAutoAlign()) return 0;
    if (!m_model) return 0;

    RangeMapper *mapper = getNewVerticalZoomRangeMapper();
    if (!mapper) return 0;

    float dmin, dmax;
    getDisplayExtents(dmin, dmax);

    int nr = mapper->getPositionForValue(dmax - dmin);

    delete mapper;

    return 100 - nr;
}

//!!! lots of duplication with TimeValueLayer

void
NoteLayer::setVerticalZoomStep(int step)
{
    if (shouldAutoAlign()) return;
    if (!m_model) return;

    RangeMapper *mapper = getNewVerticalZoomRangeMapper();
    if (!mapper) return;
    
    float min, max;
    bool logarithmic;
    QString unit;
    getValueExtents(min, max, logarithmic, unit);
    
    float dmin, dmax;
    getDisplayExtents(dmin, dmax);

    float newdist = mapper->getValueForPosition(100 - step);

    float newmin, newmax;

    if (logarithmic) {

        // see SpectrogramLayer::setVerticalZoomStep

        newmax = (newdist + sqrtf(newdist*newdist + 4*dmin*dmax)) / 2;
        newmin = newmax - newdist;

//        std::cerr << "newmin = " << newmin << ", newmax = " << newmax << std::endl;

    } else {
        float dmid = (dmax + dmin) / 2;
        newmin = dmid - newdist / 2;
        newmax = dmid + newdist / 2;
    }

    if (newmin < min) {
        newmax += (min - newmin);
        newmin = min;
    }
    if (newmax > max) {
        newmax = max;
    }
    
    std::cerr << "NoteLayer::setVerticalZoomStep: " << step << ": " << newmin << " -> " << newmax << " (range " << newdist << ")" << std::endl;

    setDisplayExtents(newmin, newmax);
}

RangeMapper *
NoteLayer::getNewVerticalZoomRangeMapper() const
{
    if (!m_model) return 0;
    
    RangeMapper *mapper;

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

    if (min == max) return 0;
    
    if (logarithmic) {
        mapper = new LogRangeMapper(0, 100, min, max, unit);
    } else {
        mapper = new LinearRangeMapper(0, 100, min, max, unit);
    }

    return mapper;
}

NoteModel::PointList
NoteLayer::getLocalPoints(View *v, int x) const
{
    if (!m_model) return NoteModel::PointList();

    long frame = v->getFrameForX(x);

    NoteModel::PointList onPoints =
	m_model->getPoints(frame);

    if (!onPoints.empty()) {
	return onPoints;
    }

    NoteModel::PointList prevPoints =
	m_model->getPreviousPoints(frame);
    NoteModel::PointList nextPoints =
	m_model->getNextPoints(frame);

    NoteModel::PointList usePoints = prevPoints;

    if (prevPoints.empty()) {
	usePoints = nextPoints;
    } else if (long(prevPoints.begin()->frame) < v->getStartFrame() &&
	       !(nextPoints.begin()->frame > v->getEndFrame())) {
	usePoints = nextPoints;
    } else if (long(nextPoints.begin()->frame) - frame <
	       frame - long(prevPoints.begin()->frame)) {
	usePoints = nextPoints;
    }

    if (!usePoints.empty()) {
	int fuzz = 2;
	int px = v->getXForFrame(usePoints.begin()->frame);
	if ((px > x && px - x > fuzz) ||
	    (px < x && x - px > fuzz + 1)) {
	    usePoints.clear();
	}
    }

    return usePoints;
}

bool
NoteLayer::getPointToDrag(View *v, int x, int y, NoteModel::Point &p) const
{
    if (!m_model) return false;

    long frame = v->getFrameForX(x);

    NoteModel::PointList onPoints = m_model->getPoints(frame);
    if (onPoints.empty()) return false;

//    std::cerr << "frame " << frame << ": " << onPoints.size() << " candidate points" << std::endl;

    int nearestDistance = -1;

    for (NoteModel::PointList::const_iterator i = onPoints.begin();
         i != onPoints.end(); ++i) {
        
        int distance = getYForValue(v, (*i).value) - y;
        if (distance < 0) distance = -distance;
        if (nearestDistance == -1 || distance < nearestDistance) {
            nearestDistance = distance;
            p = *i;
        }
    }

    return true;
}

QString
NoteLayer::getFeatureDescription(View *v, QPoint &pos) const
{
    int x = pos.x();

    if (!m_model || !m_model->getSampleRate()) return "";

    NoteModel::PointList points = getLocalPoints(v, x);

    if (points.empty()) {
	if (!m_model->isReady()) {
	    return tr("In progress");
	} else {
	    return tr("No local points");
	}
    }

    Note note(0);
    NoteModel::PointList::iterator i;

    for (i = points.begin(); i != points.end(); ++i) {

	int y = getYForValue(v, i->value);
	int h = 3;

	if (m_model->getValueQuantization() != 0.0) {
	    h = y - getYForValue(v, i->value + m_model->getValueQuantization());
	    if (h < 3) h = 3;
	}

	if (pos.y() >= y - h && pos.y() <= y) {
	    note = *i;
	    break;
	}
    }

    if (i == points.end()) return tr("No local points");

    RealTime rt = RealTime::frame2RealTime(note.frame,
					   m_model->getSampleRate());
    RealTime rd = RealTime::frame2RealTime(note.duration,
					   m_model->getSampleRate());
    
    QString pitchText;

    if (shouldConvertMIDIToHz()) {

        int mnote = lrintf(note.value);
        int cents = lrintf((note.value - mnote) * 100);
        float freq = Pitch::getFrequencyForPitch(mnote, cents);
        pitchText = tr("%1 (%2, %3 Hz)")
            .arg(Pitch::getPitchLabel(mnote, cents))
            .arg(mnote)
            .arg(freq);

    } else if (m_model->getScaleUnits() == "Hz") {

        pitchText = tr("%1 Hz (%2, %3)")
            .arg(note.value)
            .arg(Pitch::getPitchLabelForFrequency(note.value))
            .arg(Pitch::getPitchForFrequency(note.value));

    } else {
        pitchText = tr("%1 %2")
            .arg(note.value).arg(m_model->getScaleUnits());
    }

    QString text;

    if (note.label == "") {
	text = QString(tr("Time:\t%1\nPitch:\t%2\nDuration:\t%3\nNo label"))
	    .arg(rt.toText(true).c_str())
	    .arg(pitchText)
	    .arg(rd.toText(true).c_str());
    } else {
	text = QString(tr("Time:\t%1\nPitch:\t%2\nDuration:\t%3\nLabel:\t%4"))
	    .arg(rt.toText(true).c_str())
	    .arg(pitchText)
	    .arg(rd.toText(true).c_str())
	    .arg(note.label);
    }

    pos = QPoint(v->getXForFrame(note.frame),
		 getYForValue(v, note.value));
    return text;
}

bool
NoteLayer::snapToFeatureFrame(View *v, int &frame,
			      size_t &resolution,
			      SnapType snap) const
{
    if (!m_model) {
	return Layer::snapToFeatureFrame(v, frame, resolution, snap);
    }

    resolution = m_model->getResolution();
    NoteModel::PointList points;

    if (snap == SnapNeighbouring) {
	
	points = getLocalPoints(v, v->getXForFrame(frame));
	if (points.empty()) return false;
	frame = points.begin()->frame;
	return true;
    }    

    points = m_model->getPoints(frame, frame);
    int snapped = frame;
    bool found = false;

    for (NoteModel::PointList::const_iterator i = points.begin();
	 i != points.end(); ++i) {

	if (snap == SnapRight) {

	    if (i->frame > frame) {
		snapped = i->frame;
		found = true;
		break;
	    }

	} else if (snap == SnapLeft) {

	    if (i->frame <= frame) {
		snapped = i->frame;
		found = true; // don't break, as the next may be better
	    } else {
		break;
	    }

	} else { // nearest

	    NoteModel::PointList::const_iterator j = i;
	    ++j;

	    if (j == points.end()) {

		snapped = i->frame;
		found = true;
		break;

	    } else if (j->frame >= frame) {

		if (j->frame - frame < frame - i->frame) {
		    snapped = j->frame;
		} else {
		    snapped = i->frame;
		}
		found = true;
		break;
	    }
	}
    }

    frame = snapped;
    return found;
}

void
NoteLayer::getScaleExtents(View *v, float &min, float &max, bool &log) const
{
    min = 0.0;
    max = 0.0;
    log = false;

    QString queryUnits;
    if (shouldConvertMIDIToHz()) queryUnits = "Hz";
    else queryUnits = m_model->getScaleUnits();

    if (shouldAutoAlign()) {

        if (!v->getValueExtents(queryUnits, min, max, log)) {

            min = m_model->getValueMinimum();
            max = m_model->getValueMaximum();

            if (shouldConvertMIDIToHz()) {
                min = Pitch::getFrequencyForPitch(lrintf(min));
                max = Pitch::getFrequencyForPitch(lrintf(max + 1));
            }

            std::cerr << "NoteLayer[" << this << "]::getScaleExtents: min = " << min << ", max = " << max << ", log = " << log << std::endl;

        } else if (log) {

            LogRange::mapRange(min, max);

            std::cerr << "NoteLayer[" << this << "]::getScaleExtents: min = " << min << ", max = " << max << ", log = " << log << std::endl;

        }

    } else {

        getDisplayExtents(min, max);

        if (m_verticalScale == MIDIRangeScale) {
            min = Pitch::getFrequencyForPitch(0);
            max = Pitch::getFrequencyForPitch(127);
        } else if (shouldConvertMIDIToHz()) {
            min = Pitch::getFrequencyForPitch(lrintf(min));
            max = Pitch::getFrequencyForPitch(lrintf(max + 1));
        }

        if (m_verticalScale == LogScale || m_verticalScale == MIDIRangeScale) {
            LogRange::mapRange(min, max);
            log = true;
        }
    }

    if (max == min) max = min + 1.0;
}

int
NoteLayer::getYForValue(View *v, float val) const
{
    float min = 0.0, max = 0.0;
    bool logarithmic = false;
    int h = v->height();

    getScaleExtents(v, min, max, logarithmic);

//    std::cerr << "NoteLayer[" << this << "]::getYForValue(" << val << "): min = " << min << ", max = " << max << ", log = " << logarithmic << std::endl;

    if (shouldConvertMIDIToHz()) {
        val = Pitch::getFrequencyForPitch(lrintf(val),
                                          lrintf((val - lrintf(val)) * 100));
//        std::cerr << "shouldConvertMIDIToHz true, val now = " << val << std::endl;
    }

    if (logarithmic) {
        val = LogRange::map(val);
//        std::cerr << "logarithmic true, val now = " << val << std::endl;
    }

    int y = int(h - ((val - min) * h) / (max - min)) - 1;
//    std::cerr << "y = " << y << std::endl;
    return y;
}

float
NoteLayer::getValueForY(View *v, int y) const
{
    float min = 0.0, max = 0.0;
    bool logarithmic = false;
    int h = v->height();

    getScaleExtents(v, min, max, logarithmic);

    float val = min + (float(h - y) * float(max - min)) / h;

    if (logarithmic) {
        val = powf(10.f, val);
    }

    if (shouldConvertMIDIToHz()) {
        val = Pitch::getPitchForFrequency(val);
    }

    return val;
}

bool
NoteLayer::shouldAutoAlign() const
{
    if (!m_model) return false;
    return (m_verticalScale == AutoAlignScale);
}

void
NoteLayer::paint(View *v, QPainter &paint, QRect rect) const
{
    if (!m_model || !m_model->isOK()) return;

    int sampleRate = m_model->getSampleRate();
    if (!sampleRate) return;

//    Profiler profiler("NoteLayer::paint", true);

    int x0 = rect.left(), x1 = rect.right();
    long frame0 = v->getFrameForX(x0);
    long frame1 = v->getFrameForX(x1);

    NoteModel::PointList points(m_model->getPoints(frame0, frame1));
    if (points.empty()) return;

    paint.setPen(getBaseQColor());

    QColor brushColour(getBaseQColor());
    brushColour.setAlpha(80);

//    std::cerr << "NoteLayer::paint: resolution is "
//	      << m_model->getResolution() << " frames" << std::endl;

    float min = m_model->getValueMinimum();
    float max = m_model->getValueMaximum();
    if (max == min) max = min + 1.0;

    QPoint localPos;
    NoteModel::Point illuminatePoint(0);
    bool shouldIlluminate = false;

    if (v->shouldIlluminateLocalFeatures(this, localPos)) {
        shouldIlluminate = getPointToDrag(v, localPos.x(), localPos.y(),
                                          illuminatePoint);
    }

    paint.save();
    paint.setRenderHint(QPainter::Antialiasing, false);
    
    for (NoteModel::PointList::const_iterator i = points.begin();
	 i != points.end(); ++i) {

	const NoteModel::Point &p(*i);

	int x = v->getXForFrame(p.frame);
	int y = getYForValue(v, p.value);
	int w = v->getXForFrame(p.frame + p.duration) - x;
	int h = 3;
	
	if (m_model->getValueQuantization() != 0.0) {
	    h = y - getYForValue(v, p.value + m_model->getValueQuantization());
	    if (h < 3) h = 3;
	}

	if (w < 1) w = 1;
	paint.setPen(getBaseQColor());
	paint.setBrush(brushColour);

	if (shouldIlluminate &&
            // "illuminatePoint == p"
            !NoteModel::Point::Comparator()(illuminatePoint, p) &&
            !NoteModel::Point::Comparator()(p, illuminatePoint)) {

            paint.setPen(v->getForeground());
            paint.setBrush(v->getForeground());

            QString vlabel = QString("%1%2").arg(p.value).arg(m_model->getScaleUnits());
            v->drawVisibleText(paint, 
                               x - paint.fontMetrics().width(vlabel) - 2,
                               y + paint.fontMetrics().height()/2
                                 - paint.fontMetrics().descent(), 
                               vlabel, View::OutlinedText);

            QString hlabel = RealTime::frame2RealTime
                (p.frame, m_model->getSampleRate()).toText(true).c_str();
            v->drawVisibleText(paint, 
                               x,
                               y - h/2 - paint.fontMetrics().descent() - 2,
                               hlabel, View::OutlinedText);
	}
	
	paint.drawRect(x, y - h/2, w, h);
    }

    paint.restore();
}

void
NoteLayer::drawStart(View *v, QMouseEvent *e)
{
//    std::cerr << "NoteLayer::drawStart(" << e->x() << "," << e->y() << ")" << std::endl;

    if (!m_model) return;

    long frame = v->getFrameForX(e->x());
    if (frame < 0) frame = 0;
    frame = frame / m_model->getResolution() * m_model->getResolution();

    float value = getValueForY(v, e->y());

    m_editingPoint = NoteModel::Point(frame, value, 0, 0.8, tr("New Point"));
    m_originalPoint = m_editingPoint;

    if (m_editingCommand) finish(m_editingCommand);
    m_editingCommand = new NoteModel::EditCommand(m_model,
						  tr("Draw Point"));
    m_editingCommand->addPoint(m_editingPoint);

    m_editing = true;
}

void
NoteLayer::drawDrag(View *v, QMouseEvent *e)
{
//    std::cerr << "NoteLayer::drawDrag(" << e->x() << "," << e->y() << ")" << std::endl;

    if (!m_model || !m_editing) return;

    long frame = v->getFrameForX(e->x());
    if (frame < 0) frame = 0;
    frame = frame / m_model->getResolution() * m_model->getResolution();

    float newValue = getValueForY(v, e->y());

    long newFrame = m_editingPoint.frame;
    long newDuration = frame - newFrame;
    if (newDuration < 0) {
        newFrame = frame;
        newDuration = -newDuration;
    } else if (newDuration == 0) {
        newDuration = 1;
    }

    m_editingCommand->deletePoint(m_editingPoint);
    m_editingPoint.frame = newFrame;
    m_editingPoint.value = newValue;
    m_editingPoint.duration = newDuration;
    m_editingCommand->addPoint(m_editingPoint);
}

void
NoteLayer::drawEnd(View *, QMouseEvent *)
{
//    std::cerr << "NoteLayer::drawEnd(" << e->x() << "," << e->y() << ")" << std::endl;
    if (!m_model || !m_editing) return;
    finish(m_editingCommand);
    m_editingCommand = 0;
    m_editing = false;
}

void
NoteLayer::eraseStart(View *v, QMouseEvent *e)
{
    if (!m_model) return;

    if (!getPointToDrag(v, e->x(), e->y(), m_editingPoint)) return;

    if (m_editingCommand) {
	finish(m_editingCommand);
	m_editingCommand = 0;
    }

    m_editing = true;
}

void
NoteLayer::eraseDrag(View *v, QMouseEvent *e)
{
}

void
NoteLayer::eraseEnd(View *v, QMouseEvent *e)
{
    if (!m_model || !m_editing) return;

    m_editing = false;

    NoteModel::Point p(0);
    if (!getPointToDrag(v, e->x(), e->y(), p)) return;
    if (p.frame != m_editingPoint.frame || p.value != m_editingPoint.value) return;

    m_editingCommand = new NoteModel::EditCommand(m_model, tr("Erase Point"));

    m_editingCommand->deletePoint(m_editingPoint);

    finish(m_editingCommand);
    m_editingCommand = 0;
    m_editing = false;
}

void
NoteLayer::editStart(View *v, QMouseEvent *e)
{
//    std::cerr << "NoteLayer::editStart(" << e->x() << "," << e->y() << ")" << std::endl;

    if (!m_model) return;

    if (!getPointToDrag(v, e->x(), e->y(), m_editingPoint)) return;
    m_originalPoint = m_editingPoint;

    m_dragPointX = v->getXForFrame(m_editingPoint.frame);
    m_dragPointY = getYForValue(v, m_editingPoint.value);

    if (m_editingCommand) {
	finish(m_editingCommand);
	m_editingCommand = 0;
    }

    m_editing = true;
    m_dragStartX = e->x();
    m_dragStartY = e->y();
}

void
NoteLayer::editDrag(View *v, QMouseEvent *e)
{
//    std::cerr << "NoteLayer::editDrag(" << e->x() << "," << e->y() << ")" << std::endl;

    if (!m_model || !m_editing) return;

    int xdist = e->x() - m_dragStartX;
    int ydist = e->y() - m_dragStartY;
    int newx = m_dragPointX + xdist;
    int newy = m_dragPointY + ydist;

    long frame = v->getFrameForX(newx);
    if (frame < 0) frame = 0;
    frame = frame / m_model->getResolution() * m_model->getResolution();

    float value = getValueForY(v, newy);

    if (!m_editingCommand) {
	m_editingCommand = new NoteModel::EditCommand(m_model,
						      tr("Drag Point"));
    }

    m_editingCommand->deletePoint(m_editingPoint);
    m_editingPoint.frame = frame;
    m_editingPoint.value = value;
    m_editingCommand->addPoint(m_editingPoint);
}

void
NoteLayer::editEnd(View *, QMouseEvent *)
{
//    std::cerr << "NoteLayer::editEnd(" << e->x() << "," << e->y() << ")" << std::endl;
    if (!m_model || !m_editing) return;

    if (m_editingCommand) {

	QString newName = m_editingCommand->getName();

	if (m_editingPoint.frame != m_originalPoint.frame) {
	    if (m_editingPoint.value != m_originalPoint.value) {
		newName = tr("Edit Point");
	    } else {
		newName = tr("Relocate Point");
	    }
	} else {
	    newName = tr("Change Point Value");
	}

	m_editingCommand->setName(newName);
	finish(m_editingCommand);
    }

    m_editingCommand = 0;
    m_editing = false;
}

bool
NoteLayer::editOpen(View *v, QMouseEvent *e)
{
    if (!m_model) return false;

    NoteModel::Point note(0);
    if (!getPointToDrag(v, e->x(), e->y(), note)) return false;

//    NoteModel::Point note = *points.begin();

    ItemEditDialog *dialog = new ItemEditDialog
        (m_model->getSampleRate(),
         ItemEditDialog::ShowTime |
         ItemEditDialog::ShowDuration |
         ItemEditDialog::ShowValue |
         ItemEditDialog::ShowText,
         m_model->getScaleUnits());

    dialog->setFrameTime(note.frame);
    dialog->setValue(note.value);
    dialog->setFrameDuration(note.duration);
    dialog->setText(note.label);

    if (dialog->exec() == QDialog::Accepted) {

        NoteModel::Point newNote = note;
        newNote.frame = dialog->getFrameTime();
        newNote.value = dialog->getValue();
        newNote.duration = dialog->getFrameDuration();
        newNote.label = dialog->getText();
        
        NoteModel::EditCommand *command = new NoteModel::EditCommand
            (m_model, tr("Edit Point"));
        command->deletePoint(note);
        command->addPoint(newNote);
        finish(command);
    }

    delete dialog;
    return true;
}

void
NoteLayer::moveSelection(Selection s, size_t newStartFrame)
{
    if (!m_model) return;

    NoteModel::EditCommand *command =
	new NoteModel::EditCommand(m_model, tr("Drag Selection"));

    NoteModel::PointList points =
	m_model->getPoints(s.getStartFrame(), s.getEndFrame());

    for (NoteModel::PointList::iterator i = points.begin();
	 i != points.end(); ++i) {

	if (s.contains(i->frame)) {
	    NoteModel::Point newPoint(*i);
	    newPoint.frame = i->frame + newStartFrame - s.getStartFrame();
	    command->deletePoint(*i);
	    command->addPoint(newPoint);
	}
    }

    finish(command);
}

void
NoteLayer::resizeSelection(Selection s, Selection newSize)
{
    if (!m_model) return;

    NoteModel::EditCommand *command =
	new NoteModel::EditCommand(m_model, tr("Resize Selection"));

    NoteModel::PointList points =
	m_model->getPoints(s.getStartFrame(), s.getEndFrame());

    double ratio =
	double(newSize.getEndFrame() - newSize.getStartFrame()) /
	double(s.getEndFrame() - s.getStartFrame());

    for (NoteModel::PointList::iterator i = points.begin();
	 i != points.end(); ++i) {

	if (s.contains(i->frame)) {

	    double targetStart = i->frame;
	    targetStart = newSize.getStartFrame() + 
		double(targetStart - s.getStartFrame()) * ratio;

	    double targetEnd = i->frame + i->duration;
	    targetEnd = newSize.getStartFrame() +
		double(targetEnd - s.getStartFrame()) * ratio;

	    NoteModel::Point newPoint(*i);
	    newPoint.frame = lrint(targetStart);
	    newPoint.duration = lrint(targetEnd - targetStart);
	    command->deletePoint(*i);
	    command->addPoint(newPoint);
	}
    }

    finish(command);
}

void
NoteLayer::deleteSelection(Selection s)
{
    if (!m_model) return;

    NoteModel::EditCommand *command =
	new NoteModel::EditCommand(m_model, tr("Delete Selected Points"));

    NoteModel::PointList points =
	m_model->getPoints(s.getStartFrame(), s.getEndFrame());

    for (NoteModel::PointList::iterator i = points.begin();
	 i != points.end(); ++i) {

        if (s.contains(i->frame)) {
            command->deletePoint(*i);
        }
    }

    finish(command);
}    

void
NoteLayer::copy(View *v, Selection s, Clipboard &to)
{
    if (!m_model) return;

    NoteModel::PointList points =
	m_model->getPoints(s.getStartFrame(), s.getEndFrame());

    for (NoteModel::PointList::iterator i = points.begin();
	 i != points.end(); ++i) {
	if (s.contains(i->frame)) {
            Clipboard::Point point(i->frame, i->value, i->duration, i->level, i->label);
            point.setReferenceFrame(alignToReference(v, i->frame));
            to.addPoint(point);
        }
    }
}

bool
NoteLayer::paste(View *v, const Clipboard &from, int frameOffset, bool /* interactive */)
{
    if (!m_model) return false;

    const Clipboard::PointList &points = from.getPoints();

    bool realign = false;

    if (clipboardHasDifferentAlignment(v, from)) {

        QMessageBox::StandardButton button =
            QMessageBox::question(v, tr("Re-align pasted items?"),
                                  tr("The items you are pasting came from a layer with different source material from this one.  Do you want to re-align them in time, to match the source material for this layer?"),
                                  QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel,
                                  QMessageBox::Yes);

        if (button == QMessageBox::Cancel) {
            return false;
        }

        if (button == QMessageBox::Yes) {
            realign = true;
        }
    }

    NoteModel::EditCommand *command =
	new NoteModel::EditCommand(m_model, tr("Paste"));

    for (Clipboard::PointList::const_iterator i = points.begin();
         i != points.end(); ++i) {
        
        if (!i->haveFrame()) continue;
        size_t frame = 0;

        if (!realign) {
            
            frame = i->getFrame();

        } else {

            if (i->haveReferenceFrame()) {
                frame = i->getReferenceFrame();
                frame = alignFromReference(v, frame);
            } else {
                frame = i->getFrame();
            }
        }

        NoteModel::Point newPoint(frame);
  
        if (i->haveLabel()) newPoint.label = i->getLabel();
        if (i->haveValue()) newPoint.value = i->getValue();
        else newPoint.value = (m_model->getValueMinimum() +
                               m_model->getValueMaximum()) / 2;
        if (i->haveLevel()) newPoint.level = i->getLevel();
        if (i->haveDuration()) newPoint.duration = i->getDuration();
        else {
            size_t nextFrame = frame;
            Clipboard::PointList::const_iterator j = i;
            for (; j != points.end(); ++j) {
                if (!j->haveFrame()) continue;
                if (j != i) break;
            }
            if (j != points.end()) {
                nextFrame = j->getFrame();
            }
            if (nextFrame == frame) {
                newPoint.duration = m_model->getResolution();
            } else {
                newPoint.duration = nextFrame - frame;
            }
        }
        
        command->addPoint(newPoint);
    }

    finish(command);
    return true;
}

void
NoteLayer::addNoteOn(long frame, int pitch, int velocity)
{
    m_pendingNoteOns.insert(Note(frame, pitch, 0, float(velocity) / 127.0, ""));
}

void
NoteLayer::addNoteOff(long frame, int pitch)
{
    for (NoteSet::iterator i = m_pendingNoteOns.begin();
         i != m_pendingNoteOns.end(); ++i) {
        if (lrintf((*i).value) == pitch) {
            Note note(*i);
            m_pendingNoteOns.erase(i);
            note.duration = frame - note.frame;
            if (m_model) {
                NoteModel::AddPointCommand *c = new NoteModel::AddPointCommand
                    (m_model, note, tr("Record Note"));
                // execute and bundle:
                CommandHistory::getInstance()->addCommand(c, true, true);
            }
            break;
        }
    }
}

void
NoteLayer::abandonNoteOns()
{
    m_pendingNoteOns.clear();
}

int
NoteLayer::getDefaultColourHint(bool darkbg, bool &impose)
{
    impose = false;
    return ColourDatabase::getInstance()->getColourIndex
        (QString(darkbg ? "White" : "Black"));
}

void
NoteLayer::toXml(QTextStream &stream,
                 QString indent, QString extraAttributes) const
{
    SingleColourLayer::toXml(stream, indent, extraAttributes +
                             QString(" verticalScale=\"%1\" scaleMinimum=\"%2\" scaleMaximum=\"%3\" ")
                             .arg(m_verticalScale)
                             .arg(m_scaleMinimum)
                             .arg(m_scaleMaximum));
}

void
NoteLayer::setProperties(const QXmlAttributes &attributes)
{
    SingleColourLayer::setProperties(attributes);

    bool ok, alsoOk;
    VerticalScale scale = (VerticalScale)
	attributes.value("verticalScale").toInt(&ok);
    if (ok) setVerticalScale(scale);

    float min = attributes.value("scaleMinimum").toFloat(&ok);
    float max = attributes.value("scaleMaximum").toFloat(&alsoOk);
    if (ok && alsoOk) setDisplayExtents(min, max);
}