mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-29 19:28:47 -05:00
626 lines
15 KiB
C++
626 lines
15 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
|
|
// written by Christian Daniel //
|
|
// //
|
|
// 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 as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <math.h>
|
|
#include <QFontMetrics>
|
|
#include <QDataStream>
|
|
#include "gui/scaleengine.h"
|
|
|
|
/*
|
|
static double trunc(double d)
|
|
{
|
|
return (d > 0) ? floor(d) : ceil(d);
|
|
}
|
|
*/
|
|
|
|
QString ScaleEngine::formatTick(double value, int decimalPlaces)
|
|
{
|
|
if (m_physicalUnit != Unit::TimeHMS)
|
|
{
|
|
if (m_physicalUnit == Unit::Scientific) {
|
|
return QString("%1").arg(m_makeOpposite ? -value : value, 0, 'e', m_fixedDecimalPlaces);
|
|
} else {
|
|
return QString("%1").arg(m_makeOpposite ? -value : value, 0, 'f', decimalPlaces);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (m_scale < 1.0f) { // sub second prints just as is
|
|
return QString("%1").arg(m_makeOpposite ? -value : value, 0, 'f', decimalPlaces);
|
|
}
|
|
|
|
QString str;
|
|
double actual = value * m_scale; // this is the actual value in seconds
|
|
double orig = fabs(actual);
|
|
double tmp;
|
|
|
|
if(orig >= 86400.0) {
|
|
tmp = floor(actual / 86400.0);
|
|
str = QString("%1.").arg(tmp, 0, 'f', 0);
|
|
actual -= tmp * 86400.0;
|
|
if(actual < 0.0)
|
|
actual *= -1.0;
|
|
}
|
|
|
|
if(orig >= 3600.0) {
|
|
tmp = floor(actual / 3600.0);
|
|
str += QString("%1:").arg(tmp, 2, 'f', 0, QChar('0'));
|
|
actual -= tmp * 3600.0;
|
|
if(actual < 0.0)
|
|
actual *= -1.0;
|
|
}
|
|
|
|
if(orig >= 60.0) {
|
|
tmp = floor(actual / 60.0);
|
|
str += QString("%1:").arg(tmp, 2, 'f', 0, QChar('0'));
|
|
actual -= tmp * 60.0;
|
|
if(actual < 0.0)
|
|
actual *= -1.0;
|
|
}
|
|
|
|
tmp = m_makeOpposite ? -actual : actual;
|
|
str += QString("%1").arg(tmp, 2, 'f', decimalPlaces, QChar('0'));
|
|
|
|
return str;
|
|
}
|
|
}
|
|
|
|
void ScaleEngine::calcCharSize()
|
|
{
|
|
QFontMetricsF fontMetrics(m_font);
|
|
|
|
if(m_orientation == Qt::Vertical) {
|
|
m_charSize = fontMetrics.height();
|
|
} else {
|
|
QString str("012345679.,-");
|
|
int i;
|
|
float size;
|
|
float max = 0.0f;
|
|
for(i = 0; i < str.length(); i++) {
|
|
size = fontMetrics.width(QString(str[i]));
|
|
if(size > max)
|
|
max = size;
|
|
}
|
|
m_charSize = max;
|
|
}
|
|
}
|
|
|
|
void ScaleEngine::calcScaleFactor()
|
|
{
|
|
double median, range, freqBase;
|
|
|
|
median = ((m_rangeMax - m_rangeMin) / 2.0) + m_rangeMin;
|
|
range = (m_rangeMax - m_rangeMin);
|
|
freqBase = (median == 0 ? range : median);
|
|
m_scale = 1.0;
|
|
|
|
switch(m_physicalUnit) {
|
|
case Unit::None:
|
|
case Unit::Scientific:
|
|
m_unitStr.clear();
|
|
break;
|
|
|
|
case Unit::Frequency:
|
|
if(freqBase < 1000.0) {
|
|
m_unitStr = QObject::tr("Hz");
|
|
} else if(freqBase < 1000000.0) {
|
|
m_unitStr = QObject::tr("kHz");
|
|
m_scale = 1000.0;
|
|
} else if(freqBase < 1000000000.0) {
|
|
m_unitStr = QObject::tr("MHz");
|
|
m_scale = 1000000.0;
|
|
} else if(freqBase < 1000000000000.0){
|
|
m_unitStr = QObject::tr("GHz");
|
|
m_scale = 1000000000.0;
|
|
} else {
|
|
m_unitStr = QObject::tr("THz");
|
|
m_scale = 1000000000000.0;
|
|
}
|
|
break;
|
|
|
|
case Unit::Information:
|
|
if(median < 1024.0) {
|
|
m_unitStr = QObject::tr("Bytes");
|
|
} else if(median < 1048576.0) {
|
|
m_unitStr = QObject::tr("KiBytes");
|
|
m_scale = 1024.0;
|
|
} else if(median < 1073741824.0) {
|
|
m_unitStr = QObject::tr("MiBytes");
|
|
m_scale = 1048576.0;
|
|
} else if(median < 1099511627776.0) {
|
|
m_unitStr = QObject::tr("GiBytes");
|
|
m_scale = 1073741824.0;
|
|
} else if(median < 1125899906842624.0) {
|
|
m_unitStr = QObject::tr("TiBytes");
|
|
m_scale = 1099511627776.0;
|
|
} else {
|
|
m_unitStr = QObject::tr("PiBytes");
|
|
m_scale = 1125899906842624.0;
|
|
}
|
|
break;
|
|
|
|
case Unit::Percent:
|
|
m_unitStr = QString("%");
|
|
break;
|
|
|
|
case Unit::Decibel:
|
|
m_unitStr = QString("dB");
|
|
break;
|
|
|
|
case Unit::DecibelMilliWatt:
|
|
m_unitStr = QString("dBm");
|
|
break;
|
|
|
|
case Unit::DecibelMicroVolt:
|
|
m_unitStr = QString("dBµV");
|
|
break;
|
|
|
|
case Unit::AngleDegrees:
|
|
m_unitStr = QString("°");
|
|
break;
|
|
|
|
case Unit::Time:
|
|
case Unit::TimeHMS:
|
|
if (median < 0.001) {
|
|
m_unitStr = QString("µs");
|
|
m_scale = 0.000001;
|
|
} else if (median < 1.0) {
|
|
m_unitStr = QString("ms");
|
|
m_scale = 0.001;
|
|
} else if (median < 1000.0) {
|
|
m_unitStr = QString("s");
|
|
} else {
|
|
m_unitStr = QString("ks");
|
|
m_scale = 1000.0;
|
|
}
|
|
break;
|
|
|
|
case Unit::Volt:
|
|
if (median < 1e-9) {
|
|
m_unitStr = QString("pV");
|
|
m_scale = 1e-12;
|
|
} else if (median < 1e-6) {
|
|
m_unitStr = QString("nV");
|
|
m_scale = 1e-9;
|
|
} else if (median < 1e-3) {
|
|
m_unitStr = QString("µV");
|
|
m_scale = 1e-6;
|
|
} else if (median < 1.0) {
|
|
m_unitStr = QString("mV");
|
|
m_scale = 1e-3;
|
|
} else {
|
|
m_unitStr = QString("V");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
double ScaleEngine::calcMajorTickUnits(double distance, int* retDecimalPlaces)
|
|
{
|
|
double sign;
|
|
double log10x;
|
|
double exponent;
|
|
double base;
|
|
int decimalPlaces;
|
|
|
|
if(distance == 0.0)
|
|
return 0.0;
|
|
|
|
sign = (distance > 0.0) ? 1.0 : -1.0;
|
|
log10x = log10(fabs(distance));
|
|
exponent = floor(log10x);
|
|
base = pow(10.0, log10x - exponent);
|
|
decimalPlaces = (int)(-exponent);
|
|
/*
|
|
if((m_physicalUnit == Unit::Time) && (distance >= 1.0)) {
|
|
if(retDecimalPlaces != NULL)
|
|
*retDecimalPlaces = 0;
|
|
if(distance < 1.0)
|
|
return 1.0;
|
|
else if(distance < 5.0)
|
|
return 5.0;
|
|
else if(distance < 10.0)
|
|
return 10.0;
|
|
else if(distance < 15.0)
|
|
return 15.0;
|
|
else if(distance < 30.0)
|
|
return 30.0;
|
|
else if(distance < 60.0)
|
|
return 60.0;
|
|
else if(distance < 5.0 * 60.0)
|
|
return 5.0 * 60.0;
|
|
else if(distance < 10.0 * 60.0)
|
|
return 10.0 * 60.0;
|
|
else if(distance < 15.0 * 60.0)
|
|
return 15.0 * 60.0;
|
|
else if(distance < 30.0 * 60.0)
|
|
return 30.0 * 60.0;
|
|
else if(distance < 3600.0)
|
|
return 3600.0;
|
|
else if(distance < 2.0 * 3600.0)
|
|
return 2.0 * 3600.0;
|
|
else if(distance < 3.0 * 3600.0)
|
|
return 3.0 * 3600.0;
|
|
else if(distance < 6.0 * 3600.0)
|
|
return 6.0 * 3600.0;
|
|
else if(distance < 12.0 * 3600.0)
|
|
return 12.0 * 3600.0;
|
|
else if(distance < 86000.0)
|
|
return 86000.0;
|
|
else if(distance < 2.0 * 86000.0)
|
|
return 2.0 * 86000.0;
|
|
else if(distance < 7.0 * 86000.0)
|
|
return 7.0 * 86000.0;
|
|
else if(distance < 10.0 * 86000.0)
|
|
return 10.0 * 86000.0;
|
|
else if(distance < 30.0 * 86000.0)
|
|
return 30.0 * 86000.0;
|
|
else return 90.0 * 86000.0;
|
|
} */
|
|
|
|
if(base <= 1.0) {
|
|
base = 1.0;
|
|
} else if(base <= 2.0) {
|
|
base = 2.0;
|
|
} else if(base <= 2.5) {
|
|
base = 2.5;
|
|
if(decimalPlaces >= 0)
|
|
decimalPlaces++;
|
|
} else if(base <= 5.0) {
|
|
base = 5.0;
|
|
} else {
|
|
base = 10.0;
|
|
}
|
|
|
|
if(retDecimalPlaces != 0) {
|
|
if(decimalPlaces < 0)
|
|
decimalPlaces = 0;
|
|
*retDecimalPlaces = decimalPlaces;
|
|
}
|
|
|
|
return sign * base * pow(10.0, exponent);
|
|
}
|
|
|
|
int ScaleEngine::calcTickTextSize(double distance)
|
|
{
|
|
int tmp;
|
|
int tickLen;
|
|
int decimalPlaces;
|
|
|
|
tickLen = 1;
|
|
tmp = formatTick(m_rangeMin / m_scale, 0).length();
|
|
if(tmp > tickLen)
|
|
tickLen = tmp;
|
|
tmp = formatTick(m_rangeMax / m_scale, 0).length();
|
|
if(tmp > tickLen)
|
|
tickLen = tmp;
|
|
|
|
calcMajorTickUnits(distance, &decimalPlaces);
|
|
|
|
return tickLen + decimalPlaces + 1;
|
|
}
|
|
|
|
void ScaleEngine::forceTwoTicks()
|
|
{
|
|
Tick tick;
|
|
QFontMetricsF fontMetrics(m_font);
|
|
|
|
m_tickList.clear();
|
|
tick.major = true;
|
|
|
|
tick.pos = getPosFromValue(m_rangeMin);
|
|
tick.text = formatTick(m_rangeMin / m_scale, m_decimalPlaces);
|
|
tick.textSize = fontMetrics.boundingRect(tick.text).width();
|
|
if(m_orientation == Qt::Vertical)
|
|
tick.textPos = tick.pos - fontMetrics.ascent() / 2;
|
|
else tick.textPos = tick.pos - fontMetrics.boundingRect(tick.text).width() / 2;
|
|
m_tickList.append(tick);
|
|
|
|
tick.pos = getPosFromValue(m_rangeMax);
|
|
tick.text = formatTick(m_rangeMax / m_scale, m_decimalPlaces);
|
|
tick.textSize = fontMetrics.boundingRect(tick.text).width();
|
|
if(m_orientation == Qt::Vertical)
|
|
tick.textPos = tick.pos - fontMetrics.ascent() / 2;
|
|
else tick.textPos = tick.pos - fontMetrics.boundingRect(tick.text).width() / 2;
|
|
m_tickList.append(tick);
|
|
}
|
|
|
|
void ScaleEngine::reCalc()
|
|
{
|
|
float majorTickSize;
|
|
double rangeMinScaled;
|
|
double rangeMaxScaled;
|
|
int maxNumMajorTicks;
|
|
int numMajorTicks;
|
|
int step;
|
|
int skip;
|
|
double value;
|
|
double value2;
|
|
int i;
|
|
int j;
|
|
Tick tick;
|
|
float pos;
|
|
QString str;
|
|
QFontMetricsF fontMetrics(m_font);
|
|
float endPos;
|
|
float lastEndPos;
|
|
bool done;
|
|
|
|
if(!m_recalc)
|
|
return;
|
|
m_recalc = false;
|
|
|
|
m_tickList.clear();
|
|
|
|
calcScaleFactor();
|
|
rangeMinScaled = m_rangeMin / m_scale;
|
|
rangeMaxScaled = m_rangeMax / m_scale;
|
|
|
|
if(m_orientation == Qt::Vertical)
|
|
{
|
|
maxNumMajorTicks = (int)(m_size / (fontMetrics.lineSpacing() * 1.3f));
|
|
m_majorTickValueDistance = calcMajorTickUnits((rangeMaxScaled - rangeMinScaled) / maxNumMajorTicks, &m_decimalPlaces);
|
|
}
|
|
else
|
|
{
|
|
majorTickSize = (calcTickTextSize((rangeMaxScaled - rangeMinScaled) / 20) + 2) * m_charSize;
|
|
|
|
if(majorTickSize != 0.0) {
|
|
maxNumMajorTicks = (int)(m_size / majorTickSize);
|
|
} else {
|
|
maxNumMajorTicks = 20;
|
|
}
|
|
|
|
m_majorTickValueDistance = calcMajorTickUnits((rangeMaxScaled - rangeMinScaled) / maxNumMajorTicks, &m_decimalPlaces);
|
|
}
|
|
|
|
numMajorTicks = (int)((rangeMaxScaled - rangeMinScaled) / m_majorTickValueDistance);
|
|
|
|
if(numMajorTicks == 0) {
|
|
forceTwoTicks();
|
|
return;
|
|
}
|
|
|
|
if(maxNumMajorTicks > 0)
|
|
m_numMinorTicks = (int)(m_size / (maxNumMajorTicks * fontMetrics.height()));
|
|
else m_numMinorTicks = 0;
|
|
if(m_numMinorTicks < 1)
|
|
m_numMinorTicks = 0;
|
|
else if(m_numMinorTicks < 2)
|
|
m_numMinorTicks = 1;
|
|
else if(m_numMinorTicks < 5)
|
|
m_numMinorTicks = 2;
|
|
else if(m_numMinorTicks < 10)
|
|
m_numMinorTicks = 5;
|
|
else m_numMinorTicks = 10;
|
|
|
|
m_firstMajorTickValue = floor(rangeMinScaled / m_majorTickValueDistance) * m_majorTickValueDistance;
|
|
|
|
skip = 0;
|
|
|
|
if(rangeMinScaled == rangeMaxScaled)
|
|
return;
|
|
|
|
while(true) {
|
|
m_tickList.clear();
|
|
|
|
step = 0;
|
|
lastEndPos = -100000000;
|
|
done = true;
|
|
|
|
for(i = 0; true; i++) {
|
|
value = majorTickValue(i);
|
|
|
|
for(j = 1; j < m_numMinorTicks; j++) {
|
|
value2 = value + minorTickValue(j);
|
|
if(value2 < rangeMinScaled)
|
|
continue;
|
|
if(value2 > rangeMaxScaled)
|
|
break;
|
|
pos = getPosFromValue((value + minorTickValue(j)) * m_scale);
|
|
if((pos >= 0) && (pos < m_size)) {
|
|
tick.pos = pos;
|
|
tick.major = false;
|
|
tick.textPos = -1;
|
|
tick.textSize = -1;
|
|
tick.text.clear();
|
|
}
|
|
m_tickList.append(tick);
|
|
}
|
|
|
|
pos = getPosFromValue(value * m_scale);
|
|
if(pos < 0.0)
|
|
continue;
|
|
if(pos >= m_size)
|
|
break;
|
|
|
|
tick.pos = pos;
|
|
tick.major = true;
|
|
tick.textPos = -1;
|
|
tick.textSize = -1;
|
|
tick.text.clear();
|
|
|
|
if(step % (skip + 1) != 0) {
|
|
m_tickList.append(tick);
|
|
step++;
|
|
continue;
|
|
}
|
|
step++;
|
|
|
|
str = formatTick(value, m_decimalPlaces);
|
|
tick.text = str;
|
|
tick.textSize = fontMetrics.boundingRect(tick.text).width();
|
|
if(m_orientation == Qt::Vertical) {
|
|
tick.textPos = pos - fontMetrics.ascent() / 2;
|
|
endPos = tick.textPos + fontMetrics.ascent();
|
|
} else {
|
|
tick.textPos = pos - fontMetrics.boundingRect(tick.text).width() / 2;
|
|
endPos = tick.textPos + tick.textSize;
|
|
}
|
|
|
|
if(lastEndPos >= tick.textPos) {
|
|
done = false;
|
|
break;
|
|
} else {
|
|
lastEndPos = endPos;
|
|
}
|
|
|
|
m_tickList.append(tick);
|
|
}
|
|
if(done)
|
|
break;
|
|
skip++;
|
|
}
|
|
|
|
// make sure we have at least two major ticks with numbers
|
|
numMajorTicks = 0;
|
|
for(i = 0; i < m_tickList.count(); i++) {
|
|
tick = m_tickList.at(i);
|
|
if(tick.major)
|
|
numMajorTicks++;
|
|
}
|
|
if(numMajorTicks < 2)
|
|
forceTwoTicks();
|
|
}
|
|
|
|
double ScaleEngine::majorTickValue(int tick)
|
|
{
|
|
return m_firstMajorTickValue + (tick * m_majorTickValueDistance);
|
|
}
|
|
|
|
double ScaleEngine::minorTickValue(int tick)
|
|
{
|
|
if(m_numMinorTicks < 1)
|
|
return 0.0;
|
|
return (m_majorTickValueDistance * tick) / m_numMinorTicks;
|
|
}
|
|
|
|
ScaleEngine::ScaleEngine() :
|
|
m_orientation(Qt::Horizontal),
|
|
m_charSize(8),
|
|
m_size(1.0f),
|
|
m_physicalUnit(Unit::None),
|
|
m_rangeMin(-1.0),
|
|
m_rangeMax(1.0),
|
|
m_recalc(true),
|
|
m_scale(1.0f),
|
|
m_majorTickValueDistance(1.0),
|
|
m_firstMajorTickValue(1.0),
|
|
m_numMinorTicks(1),
|
|
m_decimalPlaces(1),
|
|
m_fixedDecimalPlaces(2),
|
|
m_makeOpposite(false)
|
|
{
|
|
}
|
|
|
|
void ScaleEngine::setOrientation(Qt::Orientation orientation)
|
|
{
|
|
m_orientation = orientation;
|
|
m_recalc = true;
|
|
}
|
|
|
|
void ScaleEngine::setFont(const QFont& font)
|
|
{
|
|
m_font = font;
|
|
m_recalc = true;
|
|
calcCharSize();
|
|
}
|
|
|
|
void ScaleEngine::setSize(float size)
|
|
{
|
|
if(size > 0.0f) {
|
|
m_size = size;
|
|
} else {
|
|
m_size = 1.0f;
|
|
}
|
|
m_recalc = true;
|
|
}
|
|
|
|
void ScaleEngine::setRange(Unit::Physical physicalUnit, float rangeMin, float rangeMax)
|
|
{
|
|
double tmpRangeMin;
|
|
double tmpRangeMax;
|
|
/*
|
|
if(rangeMin < rangeMax) {
|
|
tmpRangeMin = rangeMin;
|
|
tmpRangeMax = rangeMax;
|
|
} else if(rangeMin > rangeMax) {
|
|
tmpRangeMin = rangeMax;
|
|
tmpRangeMax = rangeMin;
|
|
} else {
|
|
tmpRangeMin = rangeMin * 0.99;
|
|
tmpRangeMax = rangeMin * 1.01 + 0.01;
|
|
}
|
|
*/
|
|
tmpRangeMin = rangeMin;
|
|
tmpRangeMax = rangeMax;
|
|
|
|
if((tmpRangeMin != m_rangeMin) || (tmpRangeMax != m_rangeMax) || (m_physicalUnit != physicalUnit)) {
|
|
m_physicalUnit = physicalUnit;
|
|
m_rangeMin = tmpRangeMin;
|
|
m_rangeMax = tmpRangeMax;
|
|
m_recalc = true;
|
|
}
|
|
}
|
|
|
|
float ScaleEngine::getPosFromValue(double value)
|
|
{
|
|
return ((value - m_rangeMin) / (m_rangeMax - m_rangeMin)) * (m_size - 1.0);
|
|
}
|
|
|
|
float ScaleEngine::getValueFromPos(double pos)
|
|
{
|
|
return ((pos * (m_rangeMax - m_rangeMin)) / (m_size - 1.0)) + m_rangeMin;
|
|
}
|
|
|
|
const ScaleEngine::TickList& ScaleEngine::getTickList()
|
|
{
|
|
reCalc();
|
|
return m_tickList;
|
|
}
|
|
|
|
QString ScaleEngine::getRangeMinStr()
|
|
{
|
|
if(m_unitStr.length() > 0)
|
|
return QString("%1 %2").arg(formatTick(m_rangeMin / m_scale, m_decimalPlaces)).arg(m_unitStr);
|
|
else return QString("%1").arg(formatTick(m_rangeMin / m_scale, m_decimalPlaces));
|
|
}
|
|
|
|
QString ScaleEngine::getRangeMaxStr()
|
|
{
|
|
if(m_unitStr.length() > 0)
|
|
return QString("%1 %2").arg(formatTick(m_rangeMax / m_scale, m_decimalPlaces)).arg(m_unitStr);
|
|
else return QString("%1").arg(formatTick(m_rangeMax / m_scale, m_decimalPlaces));
|
|
}
|
|
|
|
float ScaleEngine::getScaleWidth()
|
|
{
|
|
float max;
|
|
float len;
|
|
int i;
|
|
|
|
reCalc();
|
|
max = 0.0f;
|
|
for(i = 0; i < m_tickList.count(); i++) {
|
|
len = m_tickList[i].textSize;
|
|
if(len > max)
|
|
max = len;
|
|
}
|
|
return max;
|
|
}
|