96 lines
3.9 KiB
C++
96 lines
3.9 KiB
C++
#include "frmlogarithmic.h"
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#include "ui_frmlogarithmic.h"
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#include "qdebug.h"
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frmLogarithmic::frmLogarithmic(QWidget *parent) : QWidget(parent), ui(new Ui::frmLogarithmic)
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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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frmLogarithmic::~frmLogarithmic()
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{
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delete ui;
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}
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void frmLogarithmic::initForm()
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{
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ui->customPlot->setNoAntialiasingOnDrag(true); // more performance/responsiveness during dragging
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ui->customPlot->addGraph();
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QPen pen;
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pen.setColor(QColor(255, 170, 100));
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pen.setWidth(2);
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pen.setStyle(Qt::DotLine);
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ui->customPlot->graph(0)->setPen(pen);
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ui->customPlot->graph(0)->setName("x");
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ui->customPlot->addGraph();
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ui->customPlot->graph(1)->setPen(QPen(Qt::red));
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ui->customPlot->graph(1)->setBrush(QBrush(QColor(255, 0, 0, 20)));
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ui->customPlot->graph(1)->setName("-sin(x)exp(x)");
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ui->customPlot->addGraph();
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ui->customPlot->graph(2)->setPen(QPen(Qt::blue));
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ui->customPlot->graph(2)->setBrush(QBrush(QColor(0, 0, 255, 20)));
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ui->customPlot->graph(2)->setName(" sin(x)exp(x)");
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ui->customPlot->addGraph();
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pen.setColor(QColor(0, 0, 0));
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pen.setWidth(1);
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pen.setStyle(Qt::DashLine);
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ui->customPlot->graph(3)->setPen(pen);
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ui->customPlot->graph(3)->setBrush(QBrush(QColor(0, 0, 0, 15)));
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ui->customPlot->graph(3)->setLineStyle(QCPGraph::lsStepCenter);
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ui->customPlot->graph(3)->setName("x!");
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const int dataCount = 200;
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const int dataFactorialCount = 21;
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QVector<QCPGraphData> dataLinear(dataCount), dataMinusSinExp(dataCount), dataPlusSinExp(dataCount), dataFactorial(dataFactorialCount);
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for (int i = 0; i < dataCount; ++i) {
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dataLinear[i].key = i / 10.0;
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dataLinear[i].value = dataLinear[i].key;
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dataMinusSinExp[i].key = i / 10.0;
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dataMinusSinExp[i].value = -qSin(dataMinusSinExp[i].key) * qExp(dataMinusSinExp[i].key);
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dataPlusSinExp[i].key = i / 10.0;
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dataPlusSinExp[i].value = qSin(dataPlusSinExp[i].key) * qExp(dataPlusSinExp[i].key);
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}
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for (int i = 0; i < dataFactorialCount; ++i) {
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dataFactorial[i].key = i;
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dataFactorial[i].value = 1.0;
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for (int k = 1; k <= i; ++k) {
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dataFactorial[i].value *= k; // factorial
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}
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}
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ui->customPlot->graph(0)->data()->set(dataLinear);
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ui->customPlot->graph(1)->data()->set(dataMinusSinExp);
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ui->customPlot->graph(2)->data()->set(dataPlusSinExp);
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ui->customPlot->graph(3)->data()->set(dataFactorial);
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ui->customPlot->yAxis->grid()->setSubGridVisible(true);
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ui->customPlot->xAxis->grid()->setSubGridVisible(true);
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ui->customPlot->yAxis->setScaleType(QCPAxis::stLogarithmic);
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ui->customPlot->yAxis2->setScaleType(QCPAxis::stLogarithmic);
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QSharedPointer<QCPAxisTickerLog> logTicker(new QCPAxisTickerLog);
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ui->customPlot->yAxis->setTicker(logTicker);
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ui->customPlot->yAxis2->setTicker(logTicker);
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ui->customPlot->yAxis->setNumberFormat("eb"); // e = exponential, b = beautiful decimal powers
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ui->customPlot->yAxis->setNumberPrecision(0); // makes sure "1*10^4" is displayed only as "10^4"
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ui->customPlot->xAxis->setRange(0, 19.9);
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ui->customPlot->yAxis->setRange(1e-2, 1e10);
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// make top right axes clones of bottom left axes:
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ui->customPlot->axisRect()->setupFullAxesBox();
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// connect signals so top and right axes move in sync with bottom and left 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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ui->customPlot->legend->setVisible(true);
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ui->customPlot->legend->setBrush(QBrush(QColor(255, 255, 255, 150)));
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ui->customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignLeft | Qt::AlignTop); // make legend align in top left corner or axis rect
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ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
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}
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