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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "datetimeaxiswidget.h"
#include <QChart>
#include <QDateTime>
#include <QDateTimeAxis>
#include <QFile>
#include <QLineSeries>
#include <QTextStream>
#include <QValueAxis>
DateTimeAxisWidget::DateTimeAxisWidget(QWidget *parent)
: ContentWidget(parent)
{
}
bool DateTimeAxisWidget::doLoad()
{
//![1]
auto 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_spots");
if (!sunSpots.open(QIODevice::ReadOnly | QIODevice::Text)) {
m_loadError = QStringLiteral("Failed to load '%1' file.").arg(sunSpots.fileName());
return false;
}
QTextStream stream(&sunSpots);
while (!stream.atEnd()) {
QString line = stream.readLine();
if (line.startsWith("#") || line.startsWith(":"))
continue;
QStringList values = line.split(QLatin1Char(' '), Qt::SkipEmptyParts);
QDateTime momentInTime;
momentInTime.setDate(QDate(values[0].toInt(), values[1].toInt() , 15));
series->append(momentInTime.toMSecsSinceEpoch(), values[2].toDouble());
}
sunSpots.close();
//![2]
//![3]
auto chart = new QChart;
chart->addSeries(series);
chart->legend()->hide();
chart->setTitle("Sunspots count (by Space Weather Prediction Center)");
//![3]
//![4]
auto axisX = new QDateTimeAxis;
axisX->setTickCount(10);
axisX->setFormat("MMM yyyy");
axisX->setTitleText("Date");
chart->addAxis(axisX, Qt::AlignBottom);
series->attachAxis(axisX);
auto axisY = new QValueAxis;
axisY->setLabelFormat("%i");
axisY->setTitleText("Sunspots count");
chart->addAxis(axisY, Qt::AlignLeft);
series->attachAxis(axisY);
//![4]
//![5]
createDefaultChartView(chart);
//![5]
return true;
}
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