| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Charts module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <QtWidgets/QApplication> |
| #include <QtWidgets/QMainWindow> |
| #include <QtCharts/QChartView> |
| #include <QtCharts/QLineSeries> |
| #include <QtCore/QDateTime> |
| #include <QtCharts/QDateTimeAxis> |
| #include <QtCore/QFile> |
| #include <QtCore/QTextStream> |
| #include <QtCore/QDebug> |
| #include <QtCharts/QValueAxis> |
| |
| QT_CHARTS_USE_NAMESPACE |
| |
| int main(int argc, char *argv[]) |
| { |
| QApplication a(argc, argv); |
| |
| //![1] |
| QLineSeries *series = new QLineSeries(); |
| //![1] |
| |
| //![2] |
| // data from http://www.swpc.noaa.gov/ftpdir/weekly/RecentIndices.txt |
| // http://www.swpc.noaa.gov/ftpdir/weekly/README |
| // http://www.weather.gov/disclaimer |
| QFile sunSpots(":sun"); |
| if (!sunSpots.open(QIODevice::ReadOnly | QIODevice::Text)) { |
| return 1; |
| } |
| |
| QTextStream stream(&sunSpots); |
| while (!stream.atEnd()) { |
| QString line = stream.readLine(); |
| if (line.startsWith("#") || line.startsWith(":")) |
| continue; |
| QStringList values = line.split(" ", QString::SkipEmptyParts); |
| QDateTime momentInTime; |
| momentInTime.setDate(QDate(values[0].toInt(), values[1].toInt() , 15)); |
| series->append(momentInTime.toMSecsSinceEpoch(), values[2].toDouble()); |
| } |
| sunSpots.close(); |
| //![2] |
| |
| //![3] |
| QChart *chart = new QChart(); |
| chart->addSeries(series); |
| chart->legend()->hide(); |
| chart->setTitle("Sunspots count (by Space Weather Prediction Center)"); |
| //![3] |
| |
| //![4] |
| QDateTimeAxis *axisX = new QDateTimeAxis; |
| axisX->setTickCount(10); |
| axisX->setFormat("MMM yyyy"); |
| axisX->setTitleText("Date"); |
| chart->addAxis(axisX, Qt::AlignBottom); |
| series->attachAxis(axisX); |
| |
| QValueAxis *axisY = new QValueAxis; |
| axisY->setLabelFormat("%i"); |
| axisY->setTitleText("Sunspots count"); |
| chart->addAxis(axisY, Qt::AlignLeft); |
| series->attachAxis(axisY); |
| //![4] |
| |
| //![5] |
| QChartView *chartView = new QChartView(chart); |
| chartView->setRenderHint(QPainter::Antialiasing); |
| //![5] |
| |
| //![6] |
| QMainWindow window; |
| window.setCentralWidget(chartView); |
| window.resize(820, 600); |
| window.show(); |
| //![6] |
| |
| return a.exec(); |
| } |