Mercurial > hg > svgui
view layer/PaintAssistant.cpp @ 980:66da6f009edd osx-retina
Tighten spacing around sides of property box on OS/X
author | Chris Cannam |
---|---|
date | Tue, 30 Jun 2015 14:14:34 +0100 |
parents | b66fb15de477 |
children | ee01a4062747 |
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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 2006-2007 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 "PaintAssistant.h" #include "base/AudioLevel.h" #include <QPaintDevice> #include <QPainter> #include <iostream> #include <cmath> void PaintAssistant::paintVerticalLevelScale(QPainter &paint, QRect rect, double minVal, double maxVal, Scale scale, int &mult, std::vector<int> *vy) { static double meterdbs[] = { -40, -30, -20, -15, -10, -5, -3, -2, -1, -0.5, 0 }; int h = rect.height(), w = rect.width(); int textHeight = paint.fontMetrics().height(); int toff = -textHeight/2 + paint.fontMetrics().ascent() + 1; int lastLabelledY = -1; int n = 10; if (vy) vy->clear(); double step = 0; mult = 1; if (scale == LinearScale) { step = (maxVal - minVal) / n; int round = 0, limit = 10000000; do { round = int(minVal + step * mult); mult *= 10; } while (!round && mult < limit); if (round) { mult /= 10; // cerr << "\n\nstep goes from " << step; step = double(round) / mult; n = int(lrint((maxVal - minVal) / step)); if (mult > 1) { mult /= 10; } // cerr << " to " << step << " (n = " << n << ")" << endl; } } for (int i = 0; i <= n; ++i) { double val = 0.0, nval = 0.0; QString text = ""; switch (scale) { case LinearScale: val = (minVal + (i * step)); text = QString("%1").arg(mult * val); break; case MeterScale: // ... min, max val = AudioLevel::dB_to_multiplier(meterdbs[i]); text = QString("%1").arg(meterdbs[i]); if (i == n) text = "0dB"; if (i == 0) { text = "-Inf"; val = 0.0; } break; case dBScale: // ... min, max val = AudioLevel::dB_to_multiplier(-(10*n) + i * 10); text = QString("%1").arg(-(10*n) + i * 10); if (i == n) text = "0dB"; if (i == 0) { text = "-Inf"; val = 0.0; } break; } if (val < minVal || val > maxVal) continue; int y = getYForValue(scale, val, minVal, maxVal, rect.y(), h); int ny = y; if (nval != 0.0) { ny = getYForValue(scale, nval, minVal, maxVal, rect.y(), h); } // SVDEBUG << "PaintAssistant::paintVerticalLevelScale: val = " // << val << ", y = " << y << ", h = " << h << endl; bool spaceForLabel = (i == 0 || abs(y - lastLabelledY) >= textHeight - 1); if (spaceForLabel) { int tx = 3; // if (scale != LinearScale) { if (paint.fontMetrics().width(text) < w - 10) { tx = w - 10 - paint.fontMetrics().width(text); } int ty = y; if (ty < paint.fontMetrics().ascent()) { ty = paint.fontMetrics().ascent(); // } else if (ty > rect.y() + h - paint.fontMetrics().descent()) { // ty = rect.y() + h - paint.fontMetrics().descent(); } else { ty += toff; } paint.drawText(tx, ty, text); lastLabelledY = ty - toff; /* if (ny != y) { ty = ny; if (ty < paint.fontMetrics().ascent()) { ty = paint.fontMetrics().ascent(); } else if (ty > h - paint.fontMetrics().descent()) { ty = h - paint.fontMetrics().descent(); } else { ty += toff; } paint.drawText(tx, ty, text); } */ paint.drawLine(w - 7, y, w, y); if (vy) vy->push_back(y); if (ny != y) { paint.drawLine(w - 7, ny, w, ny); if (vy) vy->push_back(ny); } } else { paint.drawLine(w - 4, y, w, y); if (vy) vy->push_back(y); if (ny != y) { paint.drawLine(w - 4, ny, w, ny); if (vy) vy->push_back(ny); } } } } static int dBscale(double sample, int m, double maxVal, double minVal) { if (sample < 0.0) return dBscale(-sample, m, maxVal, minVal); double dB = AudioLevel::multiplier_to_dB(sample); double mindB = AudioLevel::multiplier_to_dB(minVal); double maxdB = AudioLevel::multiplier_to_dB(maxVal); if (dB < mindB) return 0; if (dB > 0.0) return m; return int(((dB - mindB) * m) / (maxdB - mindB) + 0.1); } int PaintAssistant::getYForValue(Scale scale, double value, double minVal, double maxVal, int minY, int height) { int vy = 0; // int m = height/2; // int my = minY + m; switch (scale) { case LinearScale: // vy = my - int(m * value); vy = minY + height - int(((value - minVal) / (maxVal - minVal)) * height); break; case MeterScale: // vy = my - AudioLevel::multiplier_to_preview(value, m); vy = minY + height - AudioLevel::multiplier_to_preview ((value - minVal) / (maxVal - minVal), height); break; case dBScale: vy = minY + height - dBscale(value, height, maxVal, minVal); break; } return vy; }