chart.cpp Example File
dynamicspline/chart.cpp/****************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the Qt Charts module. ** ** $QT_BEGIN_LICENSE:COMM$ ** ** 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 http://www.qt.io/terms-conditions. For further ** information use the contact form at http://www.qt.io/contact-us. ** ** $QT_END_LICENSE$ ** ******************************************************************************/ #include "chart.h" #include <QtCharts/QAbstractAxis> #include <QtCharts/QSplineSeries> #include <QtCharts/QValueAxis> #include <QtCore/QTime> #include <QtCore/QDebug> Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags): QChart(QChart::ChartTypeCartesian, parent, wFlags), m_series(0), m_axis(new QValueAxis), m_step(0), m_x(5), m_y(1) { qsrand((uint) QTime::currentTime().msec()); QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(handleTimeout())); m_timer.setInterval(1000); m_series = new QSplineSeries(this); QPen green(Qt::red); green.setWidth(3); m_series->setPen(green); m_series->append(m_x, m_y); addSeries(m_series); createDefaultAxes(); setAxisX(m_axis, m_series); m_axis->setTickCount(5); axisX()->setRange(0, 10); axisY()->setRange(-5, 10); m_timer.start(); } Chart::~Chart() { } void Chart::handleTimeout() { qreal x = plotArea().width() / m_axis->tickCount(); qreal y = (m_axis->max() - m_axis->min()) / m_axis->tickCount(); m_x += y; m_y = qrand() % 5 - 2.5; m_series->append(m_x, m_y); scroll(x, 0); if (m_x == 100) m_timer.stop(); }