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626 lines
15 KiB
C++
626 lines
15 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <math.h>
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#include <QFontMetrics>
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#include <QDataStream>
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#include "gui/scaleengine.h"
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/*
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static double trunc(double d)
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{
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return (d > 0) ? floor(d) : ceil(d);
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}
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*/
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QString ScaleEngine::formatTick(double value, int decimalPlaces)
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{
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if (m_physicalUnit != Unit::TimeHMS)
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{
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if (m_physicalUnit == Unit::Scientific) {
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return QString("%1").arg(m_makeOpposite ? -value : value, 0, 'e', m_fixedDecimalPlaces);
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} else {
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return QString("%1").arg(m_makeOpposite ? -value : value, 0, 'f', decimalPlaces);
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}
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}
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else
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{
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if (m_scale < 1.0f) { // sub second prints just as is
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return QString("%1").arg(m_makeOpposite ? -value : value, 0, 'f', decimalPlaces);
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}
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QString str;
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double actual = value * m_scale; // this is the actual value in seconds
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double orig = fabs(actual);
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double tmp;
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if(orig >= 86400.0) {
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tmp = floor(actual / 86400.0);
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str = QString("%1.").arg(tmp, 0, 'f', 0);
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actual -= tmp * 86400.0;
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if(actual < 0.0)
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actual *= -1.0;
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}
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if(orig >= 3600.0) {
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tmp = floor(actual / 3600.0);
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str += QString("%1:").arg(tmp, 2, 'f', 0, QChar('0'));
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actual -= tmp * 3600.0;
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if(actual < 0.0)
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actual *= -1.0;
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}
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if(orig >= 60.0) {
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tmp = floor(actual / 60.0);
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str += QString("%1:").arg(tmp, 2, 'f', 0, QChar('0'));
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actual -= tmp * 60.0;
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if(actual < 0.0)
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actual *= -1.0;
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}
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tmp = m_makeOpposite ? -actual : actual;
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str += QString("%1").arg(tmp, 2, 'f', decimalPlaces, QChar('0'));
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return str;
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}
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}
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void ScaleEngine::calcCharSize()
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{
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QFontMetricsF fontMetrics(m_font);
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if(m_orientation == Qt::Vertical) {
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m_charSize = fontMetrics.height();
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} else {
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QString str("012345679.,-");
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int i;
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float size;
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float max = 0.0f;
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for(i = 0; i < str.length(); i++) {
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size = fontMetrics.width(QString(str[i]));
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if(size > max)
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max = size;
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}
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m_charSize = max;
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}
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}
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void ScaleEngine::calcScaleFactor()
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{
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double median, range, freqBase;
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median = ((m_rangeMax - m_rangeMin) / 2.0) + m_rangeMin;
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range = (m_rangeMax - m_rangeMin);
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freqBase = (median == 0 ? range : median);
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m_scale = 1.0;
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switch(m_physicalUnit) {
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case Unit::None:
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case Unit::Scientific:
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m_unitStr.clear();
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break;
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case Unit::Frequency:
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if(freqBase < 1000.0) {
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m_unitStr = QObject::tr("Hz");
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} else if(freqBase < 1000000.0) {
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m_unitStr = QObject::tr("kHz");
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m_scale = 1000.0;
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} else if(freqBase < 1000000000.0) {
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m_unitStr = QObject::tr("MHz");
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m_scale = 1000000.0;
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} else if(freqBase < 1000000000000.0){
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m_unitStr = QObject::tr("GHz");
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m_scale = 1000000000.0;
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} else {
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m_unitStr = QObject::tr("THz");
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m_scale = 1000000000000.0;
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}
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break;
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case Unit::Information:
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if(median < 1024.0) {
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m_unitStr = QObject::tr("Bytes");
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} else if(median < 1048576.0) {
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m_unitStr = QObject::tr("KiBytes");
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m_scale = 1024.0;
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} else if(median < 1073741824.0) {
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m_unitStr = QObject::tr("MiBytes");
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m_scale = 1048576.0;
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} else if(median < 1099511627776.0) {
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m_unitStr = QObject::tr("GiBytes");
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m_scale = 1073741824.0;
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} else if(median < 1125899906842624.0) {
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m_unitStr = QObject::tr("TiBytes");
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m_scale = 1099511627776.0;
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} else {
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m_unitStr = QObject::tr("PiBytes");
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m_scale = 1125899906842624.0;
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}
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break;
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case Unit::Percent:
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m_unitStr = QString("%");
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break;
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case Unit::Decibel:
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m_unitStr = QString("dB");
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break;
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case Unit::DecibelMilliWatt:
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m_unitStr = QString("dBm");
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break;
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case Unit::DecibelMicroVolt:
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m_unitStr = QString("dBµV");
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break;
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case Unit::AngleDegrees:
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m_unitStr = QString("°");
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break;
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case Unit::Time:
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case Unit::TimeHMS:
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if (median < 0.001) {
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m_unitStr = QString("µs");
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m_scale = 0.000001;
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} else if (median < 1.0) {
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m_unitStr = QString("ms");
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m_scale = 0.001;
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} else if (median < 1000.0) {
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m_unitStr = QString("s");
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} else {
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m_unitStr = QString("ks");
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m_scale = 1000.0;
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}
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break;
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case Unit::Volt:
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if (median < 1e-9) {
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m_unitStr = QString("pV");
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m_scale = 1e-12;
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} else if (median < 1e-6) {
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m_unitStr = QString("nV");
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m_scale = 1e-9;
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} else if (median < 1e-3) {
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m_unitStr = QString("µV");
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m_scale = 1e-6;
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} else if (median < 1.0) {
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m_unitStr = QString("mV");
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m_scale = 1e-3;
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} else {
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m_unitStr = QString("V");
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}
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break;
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}
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}
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double ScaleEngine::calcMajorTickUnits(double distance, int* retDecimalPlaces)
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{
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double sign;
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double log10x;
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double exponent;
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double base;
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int decimalPlaces;
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if(distance == 0.0)
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return 0.0;
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sign = (distance > 0.0) ? 1.0 : -1.0;
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log10x = log10(fabs(distance));
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exponent = floor(log10x);
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base = pow(10.0, log10x - exponent);
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decimalPlaces = (int)(-exponent);
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/*
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if((m_physicalUnit == Unit::Time) && (distance >= 1.0)) {
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if(retDecimalPlaces != NULL)
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*retDecimalPlaces = 0;
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if(distance < 1.0)
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return 1.0;
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else if(distance < 5.0)
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return 5.0;
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else if(distance < 10.0)
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return 10.0;
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else if(distance < 15.0)
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return 15.0;
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else if(distance < 30.0)
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return 30.0;
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else if(distance < 60.0)
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return 60.0;
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else if(distance < 5.0 * 60.0)
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return 5.0 * 60.0;
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else if(distance < 10.0 * 60.0)
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return 10.0 * 60.0;
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else if(distance < 15.0 * 60.0)
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return 15.0 * 60.0;
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else if(distance < 30.0 * 60.0)
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return 30.0 * 60.0;
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else if(distance < 3600.0)
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return 3600.0;
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else if(distance < 2.0 * 3600.0)
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return 2.0 * 3600.0;
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else if(distance < 3.0 * 3600.0)
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return 3.0 * 3600.0;
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else if(distance < 6.0 * 3600.0)
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return 6.0 * 3600.0;
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else if(distance < 12.0 * 3600.0)
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return 12.0 * 3600.0;
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else if(distance < 86000.0)
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return 86000.0;
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else if(distance < 2.0 * 86000.0)
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return 2.0 * 86000.0;
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else if(distance < 7.0 * 86000.0)
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return 7.0 * 86000.0;
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else if(distance < 10.0 * 86000.0)
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return 10.0 * 86000.0;
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else if(distance < 30.0 * 86000.0)
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return 30.0 * 86000.0;
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else return 90.0 * 86000.0;
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} */
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if(base <= 1.0) {
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base = 1.0;
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} else if(base <= 2.0) {
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base = 2.0;
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} else if(base <= 2.5) {
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base = 2.5;
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if(decimalPlaces >= 0)
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decimalPlaces++;
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} else if(base <= 5.0) {
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base = 5.0;
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} else {
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base = 10.0;
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}
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if(retDecimalPlaces != 0) {
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if(decimalPlaces < 0)
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decimalPlaces = 0;
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*retDecimalPlaces = decimalPlaces;
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}
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return sign * base * pow(10.0, exponent);
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}
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int ScaleEngine::calcTickTextSize(double distance)
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{
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int tmp;
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int tickLen;
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int decimalPlaces;
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tickLen = 1;
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tmp = formatTick(m_rangeMin / m_scale, 0).length();
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if(tmp > tickLen)
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tickLen = tmp;
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tmp = formatTick(m_rangeMax / m_scale, 0).length();
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if(tmp > tickLen)
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tickLen = tmp;
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calcMajorTickUnits(distance, &decimalPlaces);
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return tickLen + decimalPlaces + 1;
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}
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void ScaleEngine::forceTwoTicks()
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{
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Tick tick;
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QFontMetricsF fontMetrics(m_font);
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m_tickList.clear();
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tick.major = true;
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tick.pos = getPosFromValue(m_rangeMin);
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tick.text = formatTick(m_rangeMin / m_scale, m_decimalPlaces);
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tick.textSize = fontMetrics.boundingRect(tick.text).width();
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if(m_orientation == Qt::Vertical)
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tick.textPos = tick.pos - fontMetrics.ascent() / 2;
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else tick.textPos = tick.pos - fontMetrics.boundingRect(tick.text).width() / 2;
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m_tickList.append(tick);
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tick.pos = getPosFromValue(m_rangeMax);
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tick.text = formatTick(m_rangeMax / m_scale, m_decimalPlaces);
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tick.textSize = fontMetrics.boundingRect(tick.text).width();
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if(m_orientation == Qt::Vertical)
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tick.textPos = tick.pos - fontMetrics.ascent() / 2;
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else tick.textPos = tick.pos - fontMetrics.boundingRect(tick.text).width() / 2;
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m_tickList.append(tick);
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}
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void ScaleEngine::reCalc()
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{
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float majorTickSize;
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double rangeMinScaled;
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double rangeMaxScaled;
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int maxNumMajorTicks;
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int numMajorTicks;
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int step;
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int skip;
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double value;
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double value2;
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int i;
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int j;
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Tick tick;
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float pos;
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QString str;
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QFontMetricsF fontMetrics(m_font);
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float endPos;
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float lastEndPos;
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bool done;
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if(!m_recalc)
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return;
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m_recalc = false;
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m_tickList.clear();
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calcScaleFactor();
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rangeMinScaled = m_rangeMin / m_scale;
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rangeMaxScaled = m_rangeMax / m_scale;
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if(m_orientation == Qt::Vertical)
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{
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maxNumMajorTicks = (int)(m_size / (fontMetrics.lineSpacing() * 1.3f));
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m_majorTickValueDistance = calcMajorTickUnits((rangeMaxScaled - rangeMinScaled) / maxNumMajorTicks, &m_decimalPlaces);
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}
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else
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{
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majorTickSize = (calcTickTextSize((rangeMaxScaled - rangeMinScaled) / 20) + 2) * m_charSize;
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if(majorTickSize != 0.0) {
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maxNumMajorTicks = (int)(m_size / majorTickSize);
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} else {
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maxNumMajorTicks = 20;
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}
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m_majorTickValueDistance = calcMajorTickUnits((rangeMaxScaled - rangeMinScaled) / maxNumMajorTicks, &m_decimalPlaces);
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}
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numMajorTicks = (int)((rangeMaxScaled - rangeMinScaled) / m_majorTickValueDistance);
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if(numMajorTicks == 0) {
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forceTwoTicks();
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return;
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}
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if(maxNumMajorTicks > 0)
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m_numMinorTicks = (int)(m_size / (maxNumMajorTicks * fontMetrics.height()));
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else m_numMinorTicks = 0;
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if(m_numMinorTicks < 1)
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m_numMinorTicks = 0;
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else if(m_numMinorTicks < 2)
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m_numMinorTicks = 1;
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else if(m_numMinorTicks < 5)
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m_numMinorTicks = 2;
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else if(m_numMinorTicks < 10)
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m_numMinorTicks = 5;
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else m_numMinorTicks = 10;
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m_firstMajorTickValue = floor(rangeMinScaled / m_majorTickValueDistance) * m_majorTickValueDistance;
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skip = 0;
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if(rangeMinScaled == rangeMaxScaled)
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return;
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while(true) {
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m_tickList.clear();
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step = 0;
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lastEndPos = -100000000;
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done = true;
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for(i = 0; true; i++) {
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value = majorTickValue(i);
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for(j = 1; j < m_numMinorTicks; j++) {
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value2 = value + minorTickValue(j);
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if(value2 < rangeMinScaled)
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continue;
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if(value2 > rangeMaxScaled)
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break;
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pos = getPosFromValue((value + minorTickValue(j)) * m_scale);
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if((pos >= 0) && (pos < m_size)) {
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tick.pos = pos;
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tick.major = false;
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tick.textPos = -1;
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tick.textSize = -1;
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tick.text.clear();
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}
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m_tickList.append(tick);
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}
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pos = getPosFromValue(value * m_scale);
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if(pos < 0.0)
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continue;
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if(pos >= m_size)
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break;
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tick.pos = pos;
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tick.major = true;
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tick.textPos = -1;
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tick.textSize = -1;
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tick.text.clear();
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if(step % (skip + 1) != 0) {
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m_tickList.append(tick);
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step++;
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continue;
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}
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step++;
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str = formatTick(value, m_decimalPlaces);
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tick.text = str;
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tick.textSize = fontMetrics.boundingRect(tick.text).width();
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if(m_orientation == Qt::Vertical) {
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tick.textPos = pos - fontMetrics.ascent() / 2;
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endPos = tick.textPos + fontMetrics.ascent();
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} else {
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tick.textPos = pos - fontMetrics.boundingRect(tick.text).width() / 2;
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endPos = tick.textPos + tick.textSize;
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}
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if(lastEndPos >= tick.textPos) {
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done = false;
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break;
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} else {
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lastEndPos = endPos;
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}
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m_tickList.append(tick);
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}
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if(done)
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break;
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skip++;
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}
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// make sure we have at least two major ticks with numbers
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numMajorTicks = 0;
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for(i = 0; i < m_tickList.count(); i++) {
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tick = m_tickList.at(i);
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if(tick.major)
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numMajorTicks++;
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}
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if(numMajorTicks < 2)
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forceTwoTicks();
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}
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double ScaleEngine::majorTickValue(int tick)
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{
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return m_firstMajorTickValue + (tick * m_majorTickValueDistance);
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}
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double ScaleEngine::minorTickValue(int tick)
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{
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if(m_numMinorTicks < 1)
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return 0.0;
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return (m_majorTickValueDistance * tick) / m_numMinorTicks;
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}
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ScaleEngine::ScaleEngine() :
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m_orientation(Qt::Horizontal),
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m_charSize(8),
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m_size(1.0f),
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m_physicalUnit(Unit::None),
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m_rangeMin(-1.0),
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m_rangeMax(1.0),
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m_recalc(true),
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m_scale(1.0f),
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m_majorTickValueDistance(1.0),
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m_firstMajorTickValue(1.0),
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m_numMinorTicks(1),
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m_decimalPlaces(1),
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m_fixedDecimalPlaces(2),
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m_makeOpposite(false)
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{
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}
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void ScaleEngine::setOrientation(Qt::Orientation orientation)
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{
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m_orientation = orientation;
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m_recalc = true;
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}
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void ScaleEngine::setFont(const QFont& font)
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{
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m_font = font;
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m_recalc = true;
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calcCharSize();
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}
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void ScaleEngine::setSize(float size)
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{
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if(size > 0.0f) {
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m_size = size;
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} else {
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m_size = 1.0f;
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}
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m_recalc = true;
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}
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void ScaleEngine::setRange(Unit::Physical physicalUnit, float rangeMin, float rangeMax)
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{
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double tmpRangeMin;
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double tmpRangeMax;
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/*
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if(rangeMin < rangeMax) {
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tmpRangeMin = rangeMin;
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tmpRangeMax = rangeMax;
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} else if(rangeMin > rangeMax) {
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tmpRangeMin = rangeMax;
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tmpRangeMax = rangeMin;
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} else {
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tmpRangeMin = rangeMin * 0.99;
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tmpRangeMax = rangeMin * 1.01 + 0.01;
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}
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*/
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tmpRangeMin = rangeMin;
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tmpRangeMax = rangeMax;
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if((tmpRangeMin != m_rangeMin) || (tmpRangeMax != m_rangeMax) || (m_physicalUnit != physicalUnit)) {
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m_physicalUnit = physicalUnit;
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m_rangeMin = tmpRangeMin;
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m_rangeMax = tmpRangeMax;
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m_recalc = true;
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}
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}
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float ScaleEngine::getPosFromValue(double value)
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{
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return ((value - m_rangeMin) / (m_rangeMax - m_rangeMin)) * (m_size - 1.0);
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}
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float ScaleEngine::getValueFromPos(double pos)
|
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{
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return ((pos * (m_rangeMax - m_rangeMin)) / (m_size - 1.0)) + m_rangeMin;
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}
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const ScaleEngine::TickList& ScaleEngine::getTickList()
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{
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reCalc();
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return m_tickList;
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}
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QString ScaleEngine::getRangeMinStr()
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{
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if(m_unitStr.length() > 0)
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return QString("%1 %2").arg(formatTick(m_rangeMin / m_scale, m_decimalPlaces)).arg(m_unitStr);
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else return QString("%1").arg(formatTick(m_rangeMin / m_scale, m_decimalPlaces));
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}
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QString ScaleEngine::getRangeMaxStr()
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{
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if(m_unitStr.length() > 0)
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return QString("%1 %2").arg(formatTick(m_rangeMax / m_scale, m_decimalPlaces)).arg(m_unitStr);
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else return QString("%1").arg(formatTick(m_rangeMax / m_scale, m_decimalPlaces));
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}
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float ScaleEngine::getScaleWidth()
|
|
{
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float max;
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float len;
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int i;
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reCalc();
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max = 0.0f;
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for(i = 0; i < m_tickList.count(); i++) {
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len = m_tickList[i].textSize;
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if(len > max)
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max = len;
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}
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return max;
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}
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