view layer/HorizontalFrequencyScale.cpp @ 1457:160e6d010141 single-point

Avoid showing progress bars for dormant layers. They'll typically be duplicates, e.g. in the vect app you can get many dormant layers all reporting the alignment completion at the same time. (Maybe it would be better just to reject progress bars for alignment in dormant layers? Hm)

/* -*- 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 2006-2018 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 "HorizontalFrequencyScale.h"
#include "HorizontalScaleProvider.h"
#include "LayerGeometryProvider.h"

#include "base/ScaleTickIntervals.h"

#include <QPainter>

#include <cmath>

int
HorizontalFrequencyScale::getHeight(LayerGeometryProvider *,
                                    QPainter &paint)
{
    return paint.fontMetrics().height() + 10;
}

void
HorizontalFrequencyScale::paintScale(LayerGeometryProvider *v,
                                     const HorizontalScaleProvider *p,
                                     QPainter &paint,
                                     QRect r,
                                     bool logarithmic)
{
    int x0 = r.x(), y0 = r.y(), x1 = r.x() + r.width(), y1 = r.y() + r.height();

    paint.drawLine(x0, y0, x1, y0);

    double f0 = p->getFrequencyForX(v, x0 ? x0 : 1);
    double f1 = p->getFrequencyForX(v, x1);

    int n = 20;

    auto ticks =
        logarithmic ?
        ScaleTickIntervals::logarithmic({ f0, f1, n }) :
        ScaleTickIntervals::linear({ f0, f1, n });

    n = int(ticks.size());

    int marginx = -1;

    for (int i = 0; i < n; ++i) {
        
        double val = ticks[i].value;
        QString label = QString::fromStdString(ticks[i].label);
        int tw = paint.fontMetrics().width(label);
        
        int x = int(round(p->getXForFrequency(v, val)));

        if (x < marginx) continue;
        
        //!!! todo: pixel scaling (here & elsewhere in these classes)
        
        paint.drawLine(x, y0, x, y1);

        paint.drawText(x + 5, y0 + paint.fontMetrics().ascent() + 5, label);

        marginx = x + tw + 10;
    }
}