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JKQtPlotter/examples/speed/speedtestplot.cpp

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/** \example speedtestplot.cpp
* JKQTPlotter: Examples: Simple line-graph with live-data (speed test)
*
* \ref JKQTPlotterSpeedTest
*/
#include "jkqtpexampleapplication.h"
#include "speedtestplot.h"
#include "jkqtplotter/graphs/jkqtpscatter.h"
#include "jkqtmath/jkqtpstatisticstools.h"
SpeedTestPlot::SpeedTestPlot():
JKQTPlotter(), NDATA(500), dx(1.0/500.0*4.0*JKQTPSTATISTICS_PI), x0(0)
{
X.fill(0);
Y.fill(0);
Y2.fill(0);
// 1. optimize JKQTPlotter for speed (by switching off anti-aliasing)
getPlotter()->setUseAntiAliasingForGraphs(false);
getPlotter()->setUseAntiAliasingForSystem(false);
getPlotter()->setUseAntiAliasingForText(false);
// 2. now we create data for a simple plot (a sine curve + random[-0.5,0.5])
updateDataSize(NDATA, false);
// 3. make data available to JKQTPlotter by adding it to the internal datastore.
// Here the data from the std::array's is not copied, but only the pointer to
// the array is added to the datastore. therefore the datastore does not manage
// the memory, oly uses the data stored in it!
JKQTPDatastore* ds=getDatastore();
size_t columnX=ds->addColumn(X.data(), NDATA, "x");
size_t columnY=ds->addColumn(Y.data(), NDATA, "y");
size_t columnY2=ds->addColumn(Y2.data(), NDATA, "y2");
// 4. create two graphs in the plot, which plots the dataset X/Y:
graph=new JKQTPXYLineGraph(this);
graph->setXColumn(columnX);
graph->setYColumn(columnY);
graph->setTitle(QObject::tr("live sin() graph"));
graph->setLineWidth(1);
graph->setSymbolType(JKQTPNoSymbol);
addGraph(graph);
graph2=new JKQTPXYLineGraph(this);
graph2->setXColumn(columnX);
graph2->setYColumn(columnY2);
graph2->setTitle(QObject::tr("live cos() graph"));
graph2->setLineWidth(1);
graph2->setSymbolType(JKQTPNoSymbol);
addGraph(graph2);
// 6. scale the plot so the graph is contained
setX(X[0], X[NDATA-1]);
setY(-2,2);
actAntiAliase=new QAction(QObject::tr("Anti-Aliase"));
actAntiAliase->setCheckable(true);
actAntiAliase->setChecked(false);
connect(actAntiAliase, &QAction::triggered, std::bind([](SpeedTestPlot* p){
p->getPlotter()->setUseAntiAliasingForGraphs(p->actAntiAliase->isChecked());
p->getPlotter()->setUseAntiAliasingForSystem(p->actAntiAliase->isChecked());
p->getPlotter()->setUseAntiAliasingForText(p->actAntiAliase->isChecked());
if (!p->actAnimation->isChecked()) p->redrawPlot();
}, this));
actTwoGraphs=new QAction(QObject::tr("2 Graphs"));
actTwoGraphs->setCheckable(true);
actTwoGraphs->setChecked(true);
connect(actTwoGraphs, &QAction::triggered, std::bind([](SpeedTestPlot* p, JKQTPXYLineGraph* g){
g->setVisible(p->actTwoGraphs->isChecked());
if (!p->actAnimation->isChecked()) p->redrawPlot();
}, this, graph2));
actFixedXAxis=new QAction(QObject::tr("Fixed X-Axis"));
actFixedXAxis->setCheckable(true);
actFixedXAxis->setChecked(false);
actLines=new QAction(QObject::tr("Show Graph Lines"));
actLines->setCheckable(true);
actLines->setChecked(true);
connect(actLines, &QAction::toggled, std::bind([](bool enabled, JKQTPXYLineGraph* g, JKQTPXYLineGraph* g2,SpeedTestPlot* p){
g->setDrawLine(enabled);
g2->setDrawLine(enabled);
if (!p->actAnimation->isChecked()) p->redrawPlot();
}, std::placeholders::_1, graph, graph2,this));
actSymbols=new QAction(QObject::tr("Show Graph Symbols"));
actSymbols->setCheckable(true);
actSymbols->setChecked(false);
connect(actSymbols, &QAction::toggled, std::bind([](bool enabled, JKQTPXYLineGraph* g, JKQTPXYLineGraph* g2,SpeedTestPlot* p){
g->setSymbolType(enabled?JKQTPCross:JKQTPNoSymbol);
g2->setSymbolType(enabled?JKQTPCircle:JKQTPNoSymbol);
if (!p->actAnimation->isChecked()) p->redrawPlot();
}, std::placeholders::_1, graph, graph2,this));
menuSizes=new QMenu(QObject::tr("number of datapoints"), this);
QActionGroup* actGroup=new QActionGroup(menuSizes);
for (size_t size: {50,100, 500, 1000, 2000, 10000}) {
QAction* act=actGroup->addAction(QString::number(size));
act->setCheckable(true);
act->setChecked(size==500);
connect(act, &QAction::toggled, std::bind([](bool enabled,SpeedTestPlot* p, size_t size){
if (enabled) {
p->updateDataSize(size);
}
}, std::placeholders::_1, this, size));
menuSizes->addAction(act);
}
actUseNonvisibleLineCompression=new QAction(QObject::tr("use NonvisibleLineCompression"));
actUseNonvisibleLineCompression->setCheckable(true);
actUseNonvisibleLineCompression->setChecked(true);
connect(actUseNonvisibleLineCompression, &QAction::toggled, std::bind([](bool enabled, JKQTPXYLineGraph* g, JKQTPXYLineGraph* g2,SpeedTestPlot* p){
g->setUseNonvisibleLineCompression(enabled);
g2->setUseNonvisibleLineCompression(enabled);
if (!p->actAnimation->isChecked()) p->redrawPlot();
}, std::placeholders::_1, graph, graph2,this));
menuUseNonvisibleLineCompressionAgressiveness=new QMenu(QObject::tr("NonvisibleLineCompression level"), this);
actGroup=new QActionGroup(menuUseNonvisibleLineCompressionAgressiveness);
for (double a: {0.5, 0.8, 1.0, 1.5, 2.0, 5.0}) {
QAction* act=actGroup->addAction(QString::number(a));
act->setCheckable(true);
act->setChecked(a==1.0);
connect(act, &QAction::toggled, std::bind([](bool enabled,JKQTPXYLineGraph* g, JKQTPXYLineGraph* g2,SpeedTestPlot* p, double a){
g->setNonvisibleLineCompressionAgressiveness(a);
g2->setNonvisibleLineCompressionAgressiveness(a);
if (!p->actAnimation->isChecked()) p->redrawPlot();
}, std::placeholders::_1, graph, graph2,this, a));
menuUseNonvisibleLineCompressionAgressiveness->addAction(act);
}
actStepAnimation=new QAction(QObject::tr("Next Animation Step"));
actStepAnimation->setCheckable(false);
actStepAnimation->setEnabled(false);
connect(actStepAnimation, &QAction::triggered, std::bind([](SpeedTestPlot* p){
p->plotNewData();
}, this));
actAnimation=new QAction(QObject::tr("Animation Active"));
actAnimation->setCheckable(true);
actAnimation->setChecked(true);
connect(actAnimation, &QAction::toggled, std::bind([](bool enabled, SpeedTestPlot* p, QAction* actStepAnimation){
if (enabled) {
p->plotNewData();
}
actStepAnimation->setEnabled(!enabled);
}, std::placeholders::_1, this, actStepAnimation));
addAction(actAntiAliase);
addAction(actFixedXAxis);
addAction(menuSizes->menuAction());
addAction(actTwoGraphs);
addAction(actLines);
addAction(actSymbols);
addAction(actUseNonvisibleLineCompression);
addAction(menuUseNonvisibleLineCompressionAgressiveness->menuAction());
addAction(actAnimation);
addAction(actStepAnimation);
// show plotter and make it a decent size
show();
resize(1000,500);
}
SpeedTestPlot::~SpeedTestPlot()
{
}
void SpeedTestPlot::plotNewData()
{
if (actFixedXAxis->isChecked()) {
// ALTERNATIVE: MOVE data, but keep x-axis range
x0+=dx;
for (size_t i=0; i<NDATA-1; i++) {
Y[i]=Y[i+1];
Y2[i]=Y2[i+1];
}
// add one new data point
Y[NDATA-1]=sin(X[NDATA-1]+x0)+static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-0.5+addOutlier(1.0/static_cast<double>(NDATA/5), 2.0);
Y2[NDATA-1]=cos(X[NDATA-1]+x0)+static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-0.5+addOutlier(1.0/static_cast<double>(NDATA/7), 2.0);
} else {
// move old data to the left
for (size_t i=0; i<NDATA-1; i++) {
X[i]=X[i+1];
Y[i]=Y[i+1];
Y2[i]=Y2[i+1];
}
// add one new data point
X[NDATA-1]=X[NDATA-2]+dx;
Y[NDATA-1]=sin(X[NDATA-1])+static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-0.5+addOutlier(1.0/static_cast<double>(NDATA/5), 2.0);
Y2[NDATA-1]=cos(X[NDATA-1])+static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-0.5+addOutlier(1.0/static_cast<double>(NDATA/7), 2.0);
}
// set new x-range and replot
setX(X[0], X[NDATA-1]);
redrawPlot();
// calculate and update FPS-rate in window title
const auto tlastalst=t_lastplot;
t_lastplot=std::chrono::system_clock::now();
const double delta_secs=static_cast<double>(std::chrono::duration_cast<std::chrono::milliseconds>(t_lastplot-tlastalst).count())/1000.0;
calctimes.push_back(delta_secs);
if (delta_secs<0.05) { while (calctimes.size()>60) calctimes.pop_front(); }
else if (delta_secs<0.1) { while (calctimes.size()>30) calctimes.pop_front(); }
else if (delta_secs<1) { while (calctimes.size()>10) calctimes.pop_front(); }
else { while (calctimes.size()>5) calctimes.pop_front(); }
setWindowTitle(QString("Live Data Speed Test: %2 datapoint, %3 [this: %1] fps").arg(1.0/delta_secs,0,'f',2).arg(NDATA).arg(1.0/jkqtpstatAverage(calctimes.begin(), calctimes.end()),0,'f',2));
// enqueue call for next data value
if (actAnimation->isChecked()) QTimer::singleShot(1, this, SLOT(plotNewData()));
}
void SpeedTestPlot::updateDataSize(size_t newSize, bool updatePlots)
{
NDATA=newSize;
dx=1.0/double(NDATA)*4.0*JKQTPSTATISTICS_PI;
// 2. now we create data for a simple plot (a sine curve + random[-0.5,0.5])
for (size_t i=0; i<X.size(); i++) {
const double x=static_cast<double>(i)*dx;
X[i]=x0+x;
Y[i]=sin(x)+static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-0.5+addOutlier(1.0/static_cast<double>(NDATA/5), 2.0);
Y2[i]=cos(x)+static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-0.5+addOutlier(1.0/static_cast<double>(NDATA/7), 2.0);
}
if (updatePlots) {
// 3. make data available to JKQTPlotter by adding it to the internal datastore.
// Here the data from the std::array's is not copied, but only the pointer to
// the array is added to the datastore. therefore the datastore does not manage
// the memory, oly uses the data stored in it!
JKQTPDatastore* ds=getDatastore();
ds->clear();
size_t columnX=ds->addColumn(X.data(), NDATA, "x");
size_t columnY=ds->addColumn(Y.data(), NDATA, "y");
size_t columnY2=ds->addColumn(Y2.data(), NDATA, "y2");
// 4. create two graphs in the plot, which plots the dataset X/Y:
graph->setXColumn(columnX);
graph->setYColumn(columnY);
graph2->setXColumn(columnX);
graph2->setYColumn(columnY2);
// 6. scale the plot so the graph is contained
setX(X[0], X[NDATA]);
setY(-2,2);
}
}
double SpeedTestPlot::addOutlier(double prob, double height)
{
if (static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)<prob) return height*(2.0*static_cast<double>(std::rand())/static_cast<double>(RAND_MAX + 1u)-1.0);
else return 0;
}
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