Chris@696: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@696: 
Chris@696: /*
Chris@696:     Sonic Visualiser
Chris@696:     An audio file viewer and annotation editor.
Chris@696:     Centre for Digital Music, Queen Mary, University of London.
Chris@696:     This file copyright 2006-2013 Chris Cannam and QMUL.
Chris@696:     
Chris@696:     This program is free software; you can redistribute it and/or
Chris@696:     modify it under the terms of the GNU General Public License as
Chris@696:     published by the Free Software Foundation; either version 2 of the
Chris@696:     License, or (at your option) any later version.  See the file
Chris@696:     COPYING included with this distribution for more information.
Chris@696: */
Chris@696: 
Chris@696: #include "LogNumericalScale.h"
Chris@696: #include "VerticalScaleLayer.h"
Chris@1276: #include "HorizontalScaleProvider.h"
Chris@1276: #include "LayerGeometryProvider.h"
Chris@696: 
Chris@696: #include "base/LogRange.h"
Chris@1276: #include "base/ScaleTickIntervals.h"
Chris@696: 
Chris@696: #include <QPainter>
Chris@696: 
Chris@696: #include <cmath>
Chris@696: 
Chris@696: int
Chris@918: LogNumericalScale::getWidth(LayerGeometryProvider *,
Chris@1276:                                 QPainter &paint,
Chris@1276:                                 bool horizontal)
Chris@696: {
Chris@1276:     if (horizontal) {
Chris@1276:         return paint.fontMetrics().height() + 10;
Chris@1276:     } else {
Chris@1276:         return paint.fontMetrics().width("-000.00") + 10;
Chris@1276:     }
Chris@696: }
Chris@696: 
Chris@696: void
Chris@918: LogNumericalScale::paintVertical(LayerGeometryProvider *v,
Chris@1266:                                  const VerticalScaleLayer *layer,
Chris@1266:                                  QPainter &paint,
Chris@1266:                                  int x0,
Chris@1266:                                  double minlog,
Chris@1266:                                  double maxlog)
Chris@696: {
Chris@1260:     int n = 10;
Chris@1260:     auto ticks = ScaleTickIntervals::logarithmicAlready({ minlog, maxlog, n });
Chris@1260:     n = int(ticks.size());
Chris@1260: 
Chris@696:     int w = getWidth(v, paint) + x0;
Chris@696: 
Chris@696:     int prevy = -1;
Chris@696:                 
Chris@696:     for (int i = 0; i < n; ++i) {
Chris@696: 
Chris@1266:         int y, ty;
Chris@696:         bool drawText = true;
Chris@696: 
Chris@1266:         if (i == n-1 &&
Chris@1266:             v->getPaintHeight() < paint.fontMetrics().height() * (n*2)) {
Chris@1266:             if (layer->getScaleUnits() != "") drawText = false;
Chris@1266:         }
Chris@696: 
Chris@1260:         double val = ticks[i].value;
Chris@1260:         QString label = QString::fromStdString(ticks[i].label);
Chris@696: 
Chris@1266:         y = layer->getYForValue(v, val);
Chris@696: 
Chris@1266:         ty = y - paint.fontMetrics().height() + paint.fontMetrics().ascent() + 2;
Chris@1266:         
Chris@1266:         if (prevy >= 0 && (prevy - y) < paint.fontMetrics().height()) {
Chris@1266:             continue;
Chris@696:         }
Chris@696: 
Chris@1266:         paint.drawLine(w - 5, y, w, y);
Chris@696: 
Chris@696:         if (drawText) {
Chris@1266:             paint.drawText(w - paint.fontMetrics().width(label) - 6,
Chris@1266:                            ty, label);
Chris@696:         }
Chris@696: 
Chris@696:         prevy = y;
Chris@696:     }
Chris@696: }
Chris@1276: 
Chris@1276: void
Chris@1276: LogNumericalScale::paintHorizontal(LayerGeometryProvider *v,
Chris@1276:                                    const HorizontalScaleProvider *p,
Chris@1276:                                    QPainter &paint,
Chris@1276:                                    QRect r)
Chris@1276: {
Chris@1276:     int x0 = r.x(), y0 = r.y(), x1 = r.x() + r.width(), y1 = r.y() + r.height();
Chris@1276: 
Chris@1276:     paint.drawLine(x0, y0, x1, y0);
Chris@1276: 
Chris@1277:     double f0 = p->getFrequencyForX(v, x0 ? x0 : 1);
Chris@1276:     double f1 = p->getFrequencyForX(v, x1);
Chris@1276: 
Chris@1277:     cerr << "f0 = " << f0 << " at x " << (x0 ? x0 : 1) << endl;
Chris@1277:     cerr << "f1 = " << f1 << " at x " << x1 << endl;
Chris@1277:     
Chris@1278:     int n = 20;
Chris@1276:     auto ticks = ScaleTickIntervals::logarithmic({ f0, f1, n });
Chris@1276:     n = int(ticks.size());
Chris@1276: 
Chris@1277:     int marginx = -1;
Chris@1276: 
Chris@1276:     for (int i = 0; i < n; ++i) {
Chris@1276:         
Chris@1276:         double val = ticks[i].value;
Chris@1276:         QString label = QString::fromStdString(ticks[i].label);
Chris@1276:         int tw = paint.fontMetrics().width(label);
Chris@1276:         
Chris@1276:         cerr << "i = " << i << ", value = " << val << ", tw = " << tw << endl;
Chris@1276: 
Chris@1277:         int x = int(round(p->getXForFrequency(v, val)));
Chris@1276: 
Chris@1276:         cerr << "x = " << x << endl;
Chris@1277: 
Chris@1277:         if (x < marginx) continue;
Chris@1276:         
Chris@1277:         //!!! todo: pixel scaling (here & elsewhere in these classes)
Chris@1277:         
Chris@1277:         paint.drawLine(x, y0, x, y1);
Chris@1277: 
Chris@1277:         paint.drawText(x + 5, y0 + paint.fontMetrics().ascent() + 5, label);
Chris@1277: 
Chris@1277:         marginx = x + tw + 10;
Chris@1276:     }
Chris@1276: }
Chris@1276: