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/* -*- 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 "LogNumericalScale.h"
#include "LayerGeometryProvider.h"
#include "CoordinateScale.h"
#include "base/LogRange.h"
#include "base/ScaleTickIntervals.h"
#include <QPainter>
#include <cmath>
namespace sv {
int
LogNumericalScale::getWidth(LayerGeometryProvider *,
QPainter &paint)
{
return paint.fontMetrics().horizontalAdvance("-000.00") + 10;
}
void
LogNumericalScale::paintVertical(LayerGeometryProvider *v,
const CoordinateScale &scale,
QPainter &paint,
int x0)
{
int n = 10;
double minf = scale.getDisplayMinimum();
double maxf = scale.getDisplayMaximum();
auto ticks = ScaleTickIntervals::logarithmic({ minf, maxf, n });
n = int(ticks.size());
int w = getWidth(v, paint) + x0;
int prevy = -1;
for (int i = 0; i < n; ++i) {
int y, ty;
bool drawText = true;
if (i == n-1 &&
v->getPaintHeight() < paint.fontMetrics().height() * (n*2)) {
if (scale.getUnit() != "") drawText = false;
}
double val = ticks[i].value;
QString label = QString::fromStdString(ticks[i].label);
y = scale.getCoordForValueRounded(v, val);
ty = y - paint.fontMetrics().height() + paint.fontMetrics().ascent() + 2;
if (prevy >= 0 && (prevy - y) < paint.fontMetrics().height()) {
continue;
}
paint.drawLine(w - 5, y, w, y);
if (drawText) {
paint.drawText(w - paint.fontMetrics().horizontalAdvance(label) - 6,
ty, label);
}
prevy = y;
}
}
} // end namespace sv
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