QtQCustomPlot介绍

介绍

主要介绍qcustomplot及其用法 最新版本：QCustomPlot Patch Release 2.1.1//November 6, 2022 下载： .qcustomplot /index.php/download 官网： .qcustomplot /index.php

简单使用 mainwindow.h /*************************************************************************** ** ** ** QCustomPlot, an easy to use, modern plotting widget for Qt ** ** Copyright (C) 2011-2022 Emanuel Eichhammer ** ** ** ** 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, either 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 for more details. ** ** ** ** You should have received a copy of the GNU General Public License ** ** along with this program. If not, see http:// .gnu.org/licenses/. ** ** ** **************************************************************************** ** Author: Emanuel Eichhammer ** ** Website/Contact: .qcustomplot / ** ** Date: 06.11.22 ** ** Version: 2.1.1 ** ****************************************************************************/ /************************************************************************************************************ ** ** ** This is the example code for QCustomPlot. ** ** ** ** It demonstrates basic and some advanced capabilities of the widget. The interesting code is inside ** ** the "setup(...)Demo" functions of MainWindow. ** ** ** ** In order to see a demo in action, call the respective "setup(...)Demo" function inside the ** ** MainWindow constructor. Alternatively you may call setupDemo(i) where i is the index of the demo ** ** you want (for those, see MainWindow constructor comments). All other functions here are merely a ** ** way to easily create screenshots of all demos for the website. I.e. a timer is set to successively ** ** setup all the demos and make a screenshot of the window area and save it in the ./screenshots ** ** directory. ** ** ** *************************************************************************************************************/ #ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include <QTimer> #include "../../qcustomplot.h" // the header file of QCustomPlot. Don't forget to add it to your project, if you use an IDE, so it gets compiled. namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = 0); ~MainWindow(); void setupDemo(int demoIndex); void setupQuadraticDemo(QCustomPlot *customPlot); void setupSimpleDemo(QCustomPlot *customPlot); void setupSincScatterDemo(QCustomPlot *customPlot); void setupScatterStyleDemo(QCustomPlot *customPlot); void setupLineStyleDemo(QCustomPlot *customPlot); void setupScatterPixmapDemo(QCustomPlot *customPlot); void setupDateDemo(QCustomPlot *customPlot); void setupTextureBrushDemo(QCustomPlot *customPlot); void setupMultiAxisDemo(QCustomPlot *customPlot); void setupLogarithmicDemo(QCustomPlot *customPlot); void setupRealtimeDataDemo(QCustomPlot *customPlot); void setupParametricCurveDemo(QCustomPlot *customPlot); void setupBarChartDemo(QCustomPlot *customPlot); void setupStatisticalDemo(QCustomPlot *customPlot); void setupSimpleItemDemo(QCustomPlot *customPlot); void setupItemDemo(QCustomPlot *customPlot); void setupStyledDemo(QCustomPlot *customPlot); void setupAdvancedAxesDemo(QCustomPlot *customPlot); void setupColorMapDemo(QCustomPlot *customPlot); void setupFinancialDemo(QCustomPlot *customPlot); void setupPolarPlotDemo(QCustomPlot *customPlot); void setupPlayground(QCustomPlot *customPlot); private slots: void realtimeDataSlot(); void bracketDataSlot(); void screenShot(); void allScreenShots(); private: Ui::MainWindow *ui; QString demoName; QTimer dataTimer; QCPItemTracer *itemDemoPhaseTracer; int currentDemoIndex; }; #endif // MAINWINDOW_H mainwindow.cpp /*************************************************************************** ** ** ** QCustomPlot, an easy to use, modern plotting widget for Qt ** ** Copyright (C) 2011-2022 Emanuel Eichhammer ** ** ** ** 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, either 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 for more details. ** ** ** ** You should have received a copy of the GNU General Public License ** ** along with this program. If not, see http:// .gnu.org/licenses/. ** ** ** **************************************************************************** ** Author: Emanuel Eichhammer ** ** Website/Contact: .qcustomplot / ** ** Date: 06.11.22 ** ** Version: 2.1.1 ** ****************************************************************************/ /************************************************************************************************************ ** ** ** This is the example code for QCustomPlot. ** ** ** ** It demonstrates basic and some advanced capabilities of the widget. The interesting code is inside ** ** the "setup(...)Demo" functions of MainWindow. ** ** ** ** In order to see a demo in action, call the respective "setup(...)Demo" function inside the ** ** MainWindow constructor. Alternatively you may call setupDemo(i) where i is the index of the demo ** ** you want (for those, see MainWindow constructor comments). All other functions here are merely a ** ** way to easily create screenshots of all demos for the website. I.e. a timer is set to successively ** ** setup all the demos and make a screenshot of the window area and save it in the ./screenshots ** ** directory. ** ** ** *************************************************************************************************************/ #include "mainwindow.h" #include "ui_mainwindow.h" #include <QDebug> #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0) # include <QDesktopWidget> #endif #include <QScreen> #include <QMessageBox> #include <QMetaEnum> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); setGeometry(400, 250, 542, 390); setupDemo(0); //setupPlayground(ui->customPlot); // 0: setupQuadraticDemo(ui->customPlot); // 1: setupSimpleDemo(ui->customPlot); // 2: setupSincScatterDemo(ui->customPlot); // 3: setupScatterStyleDemo(ui->customPlot); // 4: setupScatterPixmapDemo(ui->customPlot); // 5: setupLineStyleDemo(ui->customPlot); // 6: setupDateDemo(ui->customPlot); // 7: setupTextureBrushDemo(ui->customPlot); // 8: setupMultiAxisDemo(ui->customPlot); // 9: setupLogarithmicDemo(ui->customPlot); // 10: setupRealtimeDataDemo(ui->customPlot); // 11: setupParametricCurveDemo(ui->customPlot); // 12: setupBarChartDemo(ui->customPlot); // 13: setupStatisticalDemo(ui->customPlot); // 14: setupSimpleItemDemo(ui->customPlot); // 15: setupItemDemo(ui->customPlot); // 16: setupStyledDemo(ui->customPlot); // 17: setupAdvancedAxesDemo(ui->customPlot); // 18: setupColorMapDemo(ui->customPlot); // 19: setupFinancialDemo(ui->customPlot); // 20: setupPolarPlotDemo(ui->customPlot); // for making screenshots of the current demo or all demos (for website screenshots): //QTimer::singleShot(1500, this, SLOT(allScreenShots())); //QTimer::singleShot(4000, this, SLOT(screenShot())); } void MainWindow::setupDemo(int demoIndex) { switch (demoIndex) { case 0: setupQuadraticDemo(ui->customPlot); break; case 1: setupSimpleDemo(ui->customPlot); break; case 2: setupSincScatterDemo(ui->customPlot); break; case 3: setupScatterStyleDemo(ui->customPlot); break; case 4: setupScatterPixmapDemo(ui->customPlot); break; case 5: setupLineStyleDemo(ui->customPlot); break; case 6: setupDateDemo(ui->customPlot); break; case 7: setupTextureBrushDemo(ui->customPlot); break; case 8: setupMultiAxisDemo(ui->customPlot); break; case 9: setupLogarithmicDemo(ui->customPlot); break; case 10: setupRealtimeDataDemo(ui->customPlot); break; case 11: setupParametricCurveDemo(ui->customPlot); break; case 12: setupBarChartDemo(ui->customPlot); break; case 13: setupStatisticalDemo(ui->customPlot); break; case 14: setupSimpleItemDemo(ui->customPlot); break; case 15: setupItemDemo(ui->customPlot); break; case 16: setupStyledDemo(ui->customPlot); break; case 17: setupAdvancedAxesDemo(ui->customPlot); break; case 18: setupColorMapDemo(ui->customPlot); break; case 19: setupFinancialDemo(ui->customPlot); break; case 20: setupPolarPlotDemo(ui->customPlot); break; } setWindowTitle("QCustomPlot: "+demoName); statusBar()->clearMessage(); currentDemoIndex = demoIndex; ui->customPlot->replot(); } void MainWindow::setupQuadraticDemo(QCustomPlot *customPlot) { demoName = "Quadratic Demo"; // generate some data: QVector<double> x(101), y(101); // initialize with entries 0..100 for (int i=0; i<101; ++i) { x[i] = i/50.0 - 1; // x goes from -1 to 1 y[i] = x[i]*x[i]; // let's plot a quadratic function } // create graph and assign data to it: customPlot->addGraph(); customPlot->graph(0)->setData(x, y); // give the axes some labels: customPlot->xAxis->setLabel("x"); customPlot->yAxis->setLabel("y"); // set axes ranges, so we see all data: customPlot->xAxis->setRange(-1, 1); customPlot->yAxis->setRange(0, 1); } void MainWindow::setupSimpleDemo(QCustomPlot *customPlot) { demoName = "Simple Demo"; // add two new graphs and set their look: customPlot->addGraph(); customPlot->graph(0)->setPen(QPen(Qt::blue)); // line color blue for first graph customPlot->graph(0)->setBrush(QBrush(QColor(0, 0, 255, 20))); // first graph will be filled with translucent blue customPlot->addGraph(); customPlot->graph(1)->setPen(QPen(Qt::red)); // line color red for second graph // generate some points of data (y0 for first, y1 for second graph): QVector<double> x(251), y0(251), y1(251); for (int i=0; i<251; ++i) { x[i] = i; y0[i] = qExp(-i/150.0)*qCos(i/10.0); // exponentially decaying cosine y1[i] = qExp(-i/150.0); // exponential envelope } // configure right and top axis to show ticks but no labels: // (see QCPAxisRect::setupFullAxesBox for a quicker method to do this) customPlot->xAxis2->setVisible(true); customPlot->xAxis2->setTickLabels(false); customPlot->yAxis2->setVisible(true); customPlot->yAxis2->setTickLabels(false); // make left and bottom axes always transfer their ranges to right and top axes: connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange))); connect(customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->yAxis2, SLOT(setRange(QCPRange))); // pass data points to graphs: customPlot->graph(0)->setData(x, y0); customPlot->graph(1)->setData(x, y1); // let the ranges scale themselves so graph 0 fits perfectly in the visible area: customPlot->graph(0)->rescaleAxes(); // same thing for graph 1, but only enlarge ranges (in case graph 1 is smaller than graph 0): customPlot->graph(1)->rescaleAxes(true); // Note: we could have also just called customPlot->rescaleAxes(); instead // Allow user to drag axis ranges with mouse, zoom with mouse wheel and select graphs by clicking: customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables); } void MainWindow::setupSincScatterDemo(QCustomPlot *customPlot) { demoName = "Sinc Scatter Demo"; customPlot->legend->setVisible(true); customPlot->legend->setFont(QFont("Helvetica",9)); // set locale to english, so we get english decimal separator: customPlot->setLocale(QLocale(QLocale::English, QLocale::UnitedKingdom)); // add confidence band graphs: customPlot->addGraph(); QPen pen; pen.setStyle(Qt::DotLine); pen.setWidth(1); pen.setColor(QColor(180,180,180)); customPlot->graph(0)->setName("Confidence Band 68%"); customPlot->graph(0)->setPen(pen); customPlot->graph(0)->setBrush(QBrush(QColor(255,50,30,20))); customPlot->addGraph(); customPlot->legend->removeItem(customPlot->legend->itemCount()-1); // don't show two confidence band graphs in legend customPlot->graph(1)->setPen(pen); customPlot->graph(0)->setChannelFillGraph(customPlot->graph(1)); // add theory curve graph: customPlot->addGraph(); pen.setStyle(Qt::DashLine); pen.setWidth(2); pen.setColor(Qt::red); customPlot->graph(2)->setPen(pen); customPlot->graph(2)->setName("Theory Curve"); // add data point graph: customPlot->addGraph(); customPlot->graph(3)->setPen(QPen(Qt::blue)); customPlot->graph(3)->setName("Measurement"); customPlot->graph(3)->setLineStyle(QCPGraph::lsNone); customPlot->graph(3)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCross, 4)); // add error bars: QCPErrorBars *errorBars = new QCPErrorBars(customPlot->xAxis, customPlot->yAxis); errorBars->removeFromLegend(); errorBars->setAntialiased(false); errorBars->setDataPlottable(customPlot->graph(3)); errorBars->setPen(QPen(QColor(180,180,180))); // generate ideal sinc curve data and some randomly perturbed data for scatter plot: QVector<double> x0(250), y0(250); QVector<double> yConfUpper(250), yConfLower(250); for (int i=0; i<250; ++i) { x0[i] = (i/249.0-0.5)*30+0.01; // by adding a small offset we make sure not do divide by zero in next code line y0[i] = qSin(x0[i])/x0[i]; // sinc function yConfUpper[i] = y0[i]+0.15; yConfLower[i] = y0[i]-0.15; x0[i] *= 1000; } QVector<double> x1(50), y1(50), y1err(50); for (int i=0; i<50; ++i) { // generate a gaussian distributed random number: double tmp1 = rand()/(double)RAND_MAX; double tmp2 = rand()/(double)RAND_MAX; double r = qSqrt(-2*qLn(tmp1))*qCos(2*M_PI*tmp2); // box-muller transform for gaussian distribution // set y1 to value of y0 plus a random gaussian pertubation: x1[i] = (i/50.0-0.5)*30+0.25; y1[i] = qSin(x1[i])/x1[i]+r*0.15; x1[i] *= 1000; y1err[i] = 0.15; } // pass data to graphs and let QCustomPlot determine the axes ranges so the whole thing is visible: customPlot->graph(0)->setData(x0, yConfUpper); customPlot->graph(1)->setData(x0, yConfLower); customPlot->graph(2)->setData(x0, y0); customPlot->graph(3)->setData(x1, y1); errorBars->setData(y1err); customPlot->graph(2)->rescaleAxes(); customPlot->graph(3)->rescaleAxes(true); // setup look of bottom tick labels: customPlot->xAxis->setTickLabelRotation(30); customPlot->xAxis->ticker()->setTickCount(9); customPlot->xAxis->setNumberFormat("ebc"); customPlot->xAxis->setNumberPrecision(1); customPlot->xAxis->moveRange(-10); // make top right axes clones of bottom left axes. Looks prettier: customPlot->axisRect()->setupFullAxesBox(); } void MainWindow::setupScatterStyleDemo(QCustomPlot *customPlot) { demoName = "Scatter Style Demo"; customPlot->legend->setVisible(true); customPlot->legend->setFont(QFont("Helvetica", 9)); customPlot->legend->setRowSpacing(-3); QVector<QCPScatterStyle::ScatterShape> shapes; shapes << QCPScatterStyle::ssCross; shapes << QCPScatterStyle::ssPlus; shapes << QCPScatterStyle::ssCircle; shapes << QCPScatterStyle::ssDisc; shapes << QCPScatterStyle::ssSquare; shapes << QCPScatterStyle::ssDiamond; shapes << QCPScatterStyle::ssStar; shapes << QCPScatterStyle::ssTriangle; shapes << QCPScatterStyle::ssTriangleInverted; shapes << QCPScatterStyle::ssCrossSquare; shapes << QCPScatterStyle::ssPlusSquare; shapes << QCPScatterStyle::ssCrossCircle; shapes << QCPScatterStyle::ssPlusCircle; shapes << QCPScatterStyle::ssPeace; shapes << QCPScatterStyle::ssCustom; QPen pen; // add graphs with different scatter styles: for (int i=0; i<shapes.size(); ++i) { customPlot->addGraph(); pen.setColor(QColor(qSin(i*0.3)*100+100, qSin(i*0.6+0.7)*100+100, qSin(i*0.4+0.6)*100+100)); // generate data: QVector<double> x(10), y(10); for (int k=0; k<10; ++k) { x[k] = k/10.0 * 4*3.14 + 0.01; y[k] = 7*qSin(x[k])/x[k] + (shapes.size()-i)*5; } customPlot->graph()->setData(x, y); customPlot->graph()->rescaleAxes(true); customPlot->graph()->setPen(pen); customPlot->graph()->setName(QCPScatterStyle::staticMetaObject.enumerator(QCPScatterStyle::staticMetaObject.indexOfEnumerator("ScatterShape")).valueToKey(shapes.at(i))); customPlot->graph()->setLineStyle(QCPGraph::lsLine); // set scatter style: if (shapes.at(i) != QCPScatterStyle::ssCustom) { customPlot->graph()->setScatterStyle(QCPScatterStyle(shapes.at(i), 10)); } else { QPainterPath customScatterPath; for (int i=0; i<3; ++i) customScatterPath.cubicTo(qCos(2*M_PI*i/3.0)*9, qSin(2*M_PI*i/3.0)*9, qCos(2*M_PI*(i+0.9)/3.0)*9, qSin(2*M_PI*(i+0.9)/3.0)*9, 0, 0); customPlot->graph()->setScatterStyle(QCPScatterStyle(customScatterPath, QPen(Qt::black, 0), QColor(40, 70, 255, 50), 10)); } } // set blank axis lines: customPlot->rescaleAxes(); customPlot->xAxis->setTicks(false); customPlot->yAxis->setTicks(false); customPlot->xAxis->setTickLabels(false); customPlot->yAxis->setTickLabels(false); // make top right axes clones of bottom left axes: customPlot->axisRect()->setupFullAxesBox(); } void MainWindow::setupLineStyleDemo(QCustomPlot *customPlot) { demoName = "Line Style Demo"; customPlot->legend->setVisible(true); customPlot->legend->setFont(QFont("Helvetica", 9)); QPen pen; QStringList lineNames; lineNames << "lsNone" << "lsLine" << "lsStepLeft" << "lsStepRight" << "lsStepCenter" << "lsImpulse"; // add graphs with different line styles: for (int i=QCPGraph::lsNone; i<=QCPGraph::lsImpulse; ++i) { customPlot->addGraph(); pen.setColor(QColor(qSin(i*1+1.2)*80+80, qSin(i*0.3+0)*80+80, qSin(i*0.3+1.5)*80+80)); customPlot->graph()->setPen(pen); customPlot->graph()->setName(lineNames.at(i-QCPGraph::lsNone)); customPlot->graph()->setLineStyle((QCPGraph::LineStyle)i); customPlot->graph()->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, 5)); // generate data: QVector<double> x(15), y(15); for (int j=0; j<15; ++j) { x[j] = j/15.0 * 5*3.14 + 0.01; y[j] = 7*qSin(x[j])/x[j] - (i-QCPGraph::lsNone)*5 + (QCPGraph::lsImpulse)*5 + 2; } customPlot->graph()->setData(x, y); customPlot->graph()->rescaleAxes(true); } // zoom out a bit: customPlot->yAxis->scaleRange(1.1, customPlot->yAxis->range().center()); customPlot->xAxis->scaleRange(1.1, customPlot->xAxis->range().center()); // set blank axis lines: customPlot->xAxis->setTicks(false); customPlot->yAxis->setTicks(true); customPlot->xAxis->setTickLabels(false); customPlot->yAxis->setTickLabels(true); // make top right axes clones of bottom left axes: customPlot->axisRect()->setupFullAxesBox(); } void MainWindow::setupScatterPixmapDemo(QCustomPlot *customPlot) { demoName = "Scatter Pixmap Demo"; customPlot->axisRect()->setBackground(QPixmap("./solarpanels.jpg")); customPlot->addGraph(); customPlot->graph()->setLineStyle(QCPGraph::lsLine); QPen pen; pen.setColor(QColor(255, 200, 20, 200)); pen.setStyle(Qt::DashLine); pen.setWidthF(2.5); customPlot->graph()->setPen(pen); customPlot->graph()->setBrush(QBrush(QColor(255,200,20,70))); customPlot->graph()->setScatterStyle(QCPScatterStyle(QPixmap("./sun.png"))); // set graph name, will show up in legend next to icon: customPlot->graph()->setName("Data from Photovoltaic\nenergy barometer 2011"); // set data: QVector<double> year, value; year << 2005 << 2006 << 2007 << 2008 << 2009 << 2010 << 2011; value << 2.17 << 3.42 << 4.94 << 10.38 << 15.86 << 29.33 << 52.1; customPlot->graph()->setData(year, value); // set title of plot: customPlot->plotLayout()->insertRow(0); customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, "Regenerative Energies", QFont("sans", 12, QFont::Bold))); // axis configurations: customPlot->xAxis->setLabel("Year"); customPlot->yAxis->setLabel("Installed Gigawatts of\nphotovoltaic in the European Union"); customPlot->xAxis2->setVisible(true); customPlot->yAxis2->setVisible(true); customPlot->xAxis2->setTickLabels(false); customPlot->yAxis2->setTickLabels(false); customPlot->xAxis2->setTicks(false); customPlot->yAxis2->setTicks(false); customPlot->xAxis2-></