view view/AlignmentView.cpp @ 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 2006-2014 Chris Cannam and QMUL.
    
    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 "AlignmentView.h"

#include <QPainter>

#include "data/model/SparseOneDimensionalModel.h"

#include "layer/TimeInstantLayer.h"

using std::vector;

AlignmentView::AlignmentView(QWidget *w) :
    View(w, false),
    m_above(0),
    m_below(0)
{
    setObjectName(tr("AlignmentView"));
}

void
AlignmentView::globalCentreFrameChanged(sv_frame_t f)
{
    View::globalCentreFrameChanged(f);
    update();
}

void
AlignmentView::viewCentreFrameChanged(View *v, sv_frame_t f)
{
    View::viewCentreFrameChanged(v, f);
    if (v == m_above) {
        m_centreFrame = f;
        update();
    } else if (v == m_below) {
        update();
    }
}

void
AlignmentView::viewManagerPlaybackFrameChanged(sv_frame_t)
{
    update();
}

void
AlignmentView::viewAboveZoomLevelChanged(ZoomLevel level, bool)
{
    m_zoomLevel = level;
    update();
}

void
AlignmentView::viewBelowZoomLevelChanged(ZoomLevel, bool)
{
    update();
}

void
AlignmentView::setViewAbove(View *v)
{
    if (m_above) {
        disconnect(m_above, 0, this, 0);
    }

    m_above = v;

    if (m_above) {
        connect(m_above,
		SIGNAL(zoomLevelChanged(ZoomLevel, bool)),
                this, 
		SLOT(viewAboveZoomLevelChanged(ZoomLevel, bool)));
    }
}

void
AlignmentView::setViewBelow(View *v)
{
    if (m_below) {
        disconnect(m_below, 0, this, 0);
    }

    m_below = v;

    if (m_below) {
        connect(m_below,
		SIGNAL(zoomLevelChanged(ZoomLevel, bool)),
                this, 
		SLOT(viewBelowZoomLevelChanged(ZoomLevel, bool)));
    }
}

void
AlignmentView::paintEvent(QPaintEvent *)
{
    if (m_above == 0 || m_below == 0 || !m_manager) return;

    bool darkPalette = false;
    if (m_manager) darkPalette = m_manager->getGlobalDarkBackground();

    QColor fg, bg;
    if (darkPalette) {
        fg = Qt::gray;
        bg = Qt::black;
    } else {
        fg = Qt::black;
        bg = Qt::gray;
    }

    QPainter paint(this);
    paint.setPen(QPen(fg, 2));
    paint.setBrush(Qt::NoBrush);
    paint.setRenderHint(QPainter::Antialiasing, true);

    paint.fillRect(rect(), bg);

    vector<sv_frame_t> keyFrames = getKeyFrames();

    foreach (sv_frame_t f, keyFrames) {
        int ax = m_above->getXForFrame(f);
        sv_frame_t rf = m_above->alignToReference(f);
        sv_frame_t bf = m_below->alignFromReference(rf);
        int bx = m_below->getXForFrame(bf);
        paint.drawLine(ax, 0, bx, height());
    }

    paint.end();
}

vector<sv_frame_t>
AlignmentView::getKeyFrames()
{
    if (!m_above) {
        return getDefaultKeyFrames();
    }

    SparseOneDimensionalModel *m = 0;

    // get the topmost such
    for (int i = 0; i < m_above->getLayerCount(); ++i) {
        if (qobject_cast<TimeInstantLayer *>(m_above->getLayer(i))) {
            SparseOneDimensionalModel *mm = 
                qobject_cast<SparseOneDimensionalModel *>
                (m_above->getLayer(i)->getModel());
            if (mm) m = mm;
        }
    }

    if (!m) {
        return getDefaultKeyFrames();
    }

    vector<sv_frame_t> keyFrames;

    const SparseOneDimensionalModel::PointList pp = m->getPoints();
    for (SparseOneDimensionalModel::PointList::const_iterator pi = pp.begin();
         pi != pp.end(); ++pi) {
        keyFrames.push_back(pi->frame);
    }

    return keyFrames;
}

vector<sv_frame_t>
AlignmentView::getDefaultKeyFrames()
{
    vector<sv_frame_t> keyFrames;

    if (!m_above || !m_manager) return keyFrames;

    sv_samplerate_t rate = m_manager->getMainModelSampleRate();
    if (rate == 0) return keyFrames;

    for (sv_frame_t f = m_above->getModelsStartFrame(); 
         f <= m_above->getModelsEndFrame(); 
         f += sv_frame_t(rate * 5 + 0.5)) {
        keyFrames.push_back(f);
    }
    
    return keyFrames;
}