main.cpp Example File

logvalueaxis/main.cpp
 /****************************************************************************
 **
 ** 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 <QtCharts/QChartView>
 #include <QtCharts/QLineSeries>
 #include <QtCharts/QLogValueAxis>
 #include <QtCharts/QValueAxis>
 #include <QtWidgets/QApplication>
 #include <QtWidgets/QMainWindow>

 QT_CHARTS_USE_NAMESPACE

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QLineSeries *series = new QLineSeries();
     *series << QPointF(1.0, 1.0) << QPointF(2.0, 73.0) << QPointF(3.0, 268.0) << QPointF(4.0, 17.0)
             << QPointF(5.0, 4325.0) << QPointF(6.0, 723.0);

     QChart *chart = new QChart();
     chart->addSeries(series);
     chart->legend()->hide();
     chart->setTitle("Logarithmic axis example");

     QValueAxis *axisX = new QValueAxis();
     axisX->setTitleText("Data point");
     axisX->setLabelFormat("%i");
     axisX->setTickCount(series->count());
     chart->addAxis(axisX, Qt::AlignBottom);
     series->attachAxis(axisX);

     QLogValueAxis *axisY = new QLogValueAxis();
     axisY->setTitleText("Values");
     axisY->setLabelFormat("%g");
     axisY->setBase(8.0);
     axisY->setMinorTickCount(-1);
     chart->addAxis(axisY, Qt::AlignLeft);
     series->attachAxis(axisY);

     QChartView *chartView = new QChartView(chart);
     chartView->setRenderHint(QPainter::Antialiasing);

     QMainWindow window;
     window.setCentralWidget(chartView);
     window.resize(800, 600);
     window.show();

     return app.exec();
 }