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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
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** 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
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#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();
}
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