Mercurial > hg > svgui
view layer/LogNumericalScale.cpp @ 1036:bc9b4a163926 spectrogram-minor-refactor
Fix cache validity boundary condition
author | Chris Cannam |
---|---|
date | Tue, 02 Feb 2016 14:28:00 +0000 |
parents | 4fe7a09be0fe |
children | 5144d7185fb5 |
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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 2006-2013 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 "VerticalScaleLayer.h" #include "base/LogRange.h" #include <QPainter> #include <cmath> #include "view/View.h" //#define DEBUG_TIME_VALUE_LAYER 1 int LogNumericalScale::getWidth(LayerGeometryProvider *, QPainter &paint) { return paint.fontMetrics().width("-000.00") + 10; } void LogNumericalScale::paintVertical(LayerGeometryProvider *v, const VerticalScaleLayer *layer, QPainter &paint, int x0, double minlog, double maxlog) { int w = getWidth(v, paint) + x0; int n = 10; double val = minlog; double inc = (maxlog - val) / n; // even increments of log scale // smallest increment as displayed double minDispInc = LogRange::unmap(minlog + inc) - LogRange::unmap(minlog); #ifdef DEBUG_TIME_VALUE_LAYER cerr << "min = " << minlog << ", max = " << maxlog << ", inc = " << inc << ", minDispInc = " << minDispInc << endl; #endif const int buflen = 40; char buffer[buflen]; double round = 1.f; int dp = 0; if (minDispInc > 0) { int prec = int(trunc(log10(minDispInc))); if (prec < 0) dp = -prec; round = pow(10.0, prec); if (dp > 4) dp = 4; #ifdef DEBUG_TIME_VALUE_LAYER cerr << "round = " << round << ", prec = " << prec << ", dp = " << dp << endl; #endif } 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 (layer->getScaleUnits() != "") drawText = false; } double dispval = LogRange::unmap(val); dispval = floor(dispval / round) * round; #ifdef DEBUG_TIME_VALUE_LAYER cerr << "val = " << val << ", dispval = " << dispval << endl; #endif y = layer->getYForValue(v, dispval); ty = y - paint.fontMetrics().height() + paint.fontMetrics().ascent() + 2; if (prevy >= 0 && (prevy - y) < paint.fontMetrics().height()) { val += inc; continue; } int digits = int(trunc(log10(dispval))); int sf = dp + (digits > 0 ? digits : 0); if (sf < 4) sf = 4; #ifdef DEBUG_TIME_VALUE_LAYER cerr << "sf = " << sf << endl; #endif snprintf(buffer, buflen, "%.*g", sf, dispval); QString label = QString(buffer); paint.drawLine(w - 5, y, w, y); if (drawText) { paint.drawText(w - paint.fontMetrics().width(label) - 6, ty, label); } prevy = y; val += inc; } }