view data/model/Model.cpp @ 1455:ec9e65fcf749

The use of the begin/end pairs here just seems to cause too many rows to be deleted (from the visual representation, not the underlying model). Things apparently work better if we just modify the underlying model and let the change signals percolate back up again. To that end, update the change handlers so as to cover their proper ranges with dataChanged signals.

/* -*- 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 "Model.h"
#include "AlignmentModel.h"

#include <QTextStream>

#include <iostream>

const int Model::COMPLETION_UNKNOWN = -1;

Model::~Model()
{
//    SVDEBUG << "Model::~Model(" << this << ")" << endl;

    if (!m_aboutToDelete) {
        SVDEBUG << "NOTE: Model(" << this << ", \""
                << objectName() << "\", type uri <"
                << m_typeUri << ">)::~Model(): Model deleted "
                << "with no aboutToDelete notification"
                << endl;
    }

    if (m_alignment) {
        m_alignment->aboutToDelete();
        delete m_alignment;
    }
}

void
Model::setSourceModel(Model *model)
{
    if (m_sourceModel) {
        disconnect(m_sourceModel, SIGNAL(aboutToBeDeleted()),
                   this, SLOT(sourceModelAboutToBeDeleted()));
    }

    m_sourceModel = model;

    if (m_sourceModel) {
        connect(m_sourceModel, SIGNAL(alignmentCompletionChanged()),
                this, SIGNAL(alignmentCompletionChanged()));
        connect(m_sourceModel, SIGNAL(aboutToBeDeleted()),
                this, SLOT(sourceModelAboutToBeDeleted()));
    }
}

void
Model::aboutToDelete()
{
//    SVDEBUG << "Model(" << this << ", \""
//            << objectName() << "\", type uri <"
//            << m_typeUri << ">)::aboutToDelete()" << endl;

    if (m_aboutToDelete) {
        SVDEBUG << "WARNING: Model(" << this << ", \""
                << objectName() << "\", type uri <"
                << m_typeUri << ">)::aboutToDelete: "
                << "aboutToDelete called more than once for the same model"
                << endl;
    }

    emit aboutToBeDeleted();
    m_aboutToDelete = true;
}

void
Model::sourceModelAboutToBeDeleted()
{
    m_sourceModel = 0;
}

void
Model::setAlignment(AlignmentModel *alignment)
{
    if (m_alignment) {
        m_alignment->aboutToDelete();
        delete m_alignment;
    }
    
    m_alignment = alignment;

    if (m_alignment) {
        connect(m_alignment, SIGNAL(completionChanged()),
                this, SIGNAL(alignmentCompletionChanged()));
    }
}

const AlignmentModel *
Model::getAlignment() const
{
    return m_alignment;
}

const Model *
Model::getAlignmentReference() const
{
    if (!m_alignment) {
        if (m_sourceModel) return m_sourceModel->getAlignmentReference();
        return 0;
    }
    return m_alignment->getReferenceModel();
}

sv_frame_t
Model::alignToReference(sv_frame_t frame) const
{
//    cerr << "Model(" << this << ")::alignToReference(" << frame << ")" << endl;
    if (!m_alignment) {
        if (m_sourceModel) return m_sourceModel->alignToReference(frame);
        else return frame;
    }
    sv_frame_t refFrame = m_alignment->toReference(frame);
    const Model *m = m_alignment->getReferenceModel();
    if (m && refFrame > m->getEndFrame()) refFrame = m->getEndFrame();
//    cerr << "have alignment, aligned is " << refFrame << endl;
    return refFrame;
}

sv_frame_t
Model::alignFromReference(sv_frame_t refFrame) const
{
//    cerr << "Model(" << this << ")::alignFromReference(" << refFrame << ")" << endl;
    if (!m_alignment) {
        if (m_sourceModel) return m_sourceModel->alignFromReference(refFrame);
        else return refFrame;
    }
    sv_frame_t frame = m_alignment->fromReference(refFrame);
    if (frame > getEndFrame()) frame = getEndFrame();
//    cerr << "have alignment, aligned is " << frame << endl;
    return frame;
}

int
Model::getAlignmentCompletion() const
{
//    SVDEBUG << "Model::getAlignmentCompletion" << endl;
    if (!m_alignment) {
        if (m_sourceModel) return m_sourceModel->getAlignmentCompletion();
        else return 100;
    }
    int completion = 0;
    (void)m_alignment->isReady(&completion);
//    cerr << " -> " << completion << endl;
    return completion;
}

QString
Model::getTitle() const
{
    if (m_sourceModel) return m_sourceModel->getTitle();
    else return "";
}

QString
Model::getMaker() const
{
    if (m_sourceModel) return m_sourceModel->getMaker();
    else return "";
}

QString
Model::getLocation() const
{
    if (m_sourceModel) return m_sourceModel->getLocation();
    else return "";
}

void
Model::toXml(QTextStream &stream, QString indent,
             QString extraAttributes) const
{
    stream << indent;
    stream << QString("<model id=\"%1\" name=\"%2\" sampleRate=\"%3\" start=\"%4\" end=\"%5\" %6/>\n")
        .arg(getObjectExportId(this))
        .arg(encodeEntities(objectName()))
        .arg(getSampleRate())
        .arg(getStartFrame())
        .arg(getEndFrame())
        .arg(extraAttributes);
}