2021-12-08 09:44:30 +00:00
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#include "frmsimple.h"
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#include "ui_frmsimple.h"
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#include "qdebug.h"
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frmSimple::frmSimple(QWidget *parent) : QWidget(parent), ui(new Ui::frmSimple)
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{
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ui->setupUi(this);
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this->initForm();
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}
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frmSimple::~frmSimple()
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{
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delete ui;
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}
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void frmSimple::initForm()
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{
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// add two new graphs and set their look:
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ui->customPlot->addGraph();
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ui->customPlot->graph(0)->setPen(QPen(Qt::blue)); // line color blue for first graph
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ui->customPlot->graph(0)->setBrush(QBrush(QColor(0, 0, 255, 20))); // first graph will be filled with translucent blue
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ui->customPlot->addGraph();
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ui->customPlot->graph(1)->setPen(QPen(Qt::red)); // line color red for second graph
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2022-05-18 09:38:40 +00:00
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2021-12-08 09:44:30 +00:00
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// generate some points of data (y0 for first, y1 for second graph):
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QVector<double> x(251), y0(251), y1(251);
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for (int i = 0; i < 251; ++i) {
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x[i] = i;
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y0[i] = qExp(-i / 150.0) * qCos(i / 10.0); // exponentially decaying cosine
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y1[i] = qExp(-i / 150.0); // exponential envelope
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}
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2022-05-18 09:38:40 +00:00
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2021-12-08 09:44:30 +00:00
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// configure right and top axis to show ticks but no labels:
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// (see QCPAxisRect::setupFullAxesBox for a quicker method to do this)
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ui->customPlot->xAxis2->setVisible(true);
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ui->customPlot->xAxis2->setTickLabels(false);
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ui->customPlot->yAxis2->setVisible(true);
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ui->customPlot->yAxis2->setTickLabels(false);
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2022-05-18 09:38:40 +00:00
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2021-12-08 09:44:30 +00:00
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// make left and bottom axes always transfer their ranges to right and top axes:
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connect(ui->customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), ui->customPlot->xAxis2, SLOT(setRange(QCPRange)));
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connect(ui->customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), ui->customPlot->yAxis2, SLOT(setRange(QCPRange)));
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2022-05-18 09:38:40 +00:00
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2021-12-08 09:44:30 +00:00
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// pass data points to graphs:
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ui->customPlot->graph(0)->setData(x, y0);
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ui->customPlot->graph(1)->setData(x, y1);
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// let the ranges scale themselves so graph 0 fits perfectly in the visible area:
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ui->customPlot->graph(0)->rescaleAxes();
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// same thing for graph 1, but only enlarge ranges (in case graph 1 is smaller than graph 0):
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ui->customPlot->graph(1)->rescaleAxes(true);
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// Note: we could have also just called customPlot->rescaleAxes(); instead
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// Allow user to drag axis ranges with mouse, zoom with mouse wheel and select graphs by clicking:
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ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables);
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}
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