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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.io
**
** This file is part of the Qt Charts module.
**
** Licensees holding valid commercial license for Qt may use this file in
** accordance with the Qt License Agreement provided with the Software
** or, alternatively, in accordance with the terms contained in a written
** agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.io
**
****************************************************************************/
#include "chartview.h"
#include <QtCharts/QLineSeries>
#include <QtCharts/QScatterSeries>
#include <QtCharts/QSplineSeries>
#include <QtCharts/QAreaSeries>
#include <QtCore/QTime>
ChartView::ChartView(QChart *chart, QWidget *parent)
: QChartView(chart, parent),
m_index(-1),
m_chart(chart)
{
m_chart->setTitle("Charts presenter");
m_chart->setDropShadowEnabled(false);
QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(handleTimeout()));
m_timer.setInterval(3000);
//![1]
QLineSeries *series0 = new QLineSeries();
series0->setName("line");
QScatterSeries *series1 = new QScatterSeries();
series1->setName("scatter");
QSplineSeries *series2 = new QSplineSeries();
series2->setName("spline");
QAreaSeries *series3 = new QAreaSeries(series0);
series3->setName("area");
//![1]
//![2]
int numPoints = 10;
for (int x = 0; x <= numPoints; ++x) {
qreal y = qrand() % 100;
series0->append(x, y);
series1->append(x, y);
series2->append(x, y);
}
//![2]
//![3]
m_series << series0;
m_titles << m_chart->title() + ": LineChart";
m_series << series1;
m_titles << m_chart->title() + ": ScatterChart";
m_series << series2;
m_titles << m_chart->title() + ": SplineChart";
m_series << series3;
m_titles << m_chart->title() + ": AreaChart";
//![3]
m_timer.start();
handleTimeout();
}
ChartView::~ChartView()
{
if (m_series.size() == 0)
return;
m_chart->removeSeries(m_series.at(m_index));
m_series.removeLast(); //remove QAreaSeries instance since they will be deleted when QLineSeries instance is gone
qDeleteAll(m_series);
}
//![4]
void ChartView::handleTimeout()
{
if (m_series.size() == 0)
return;
if (m_index >= 0)
m_chart->removeSeries(m_series.at(m_index));
m_index++;
m_index = m_index % m_series.size();
m_chart->addSeries(m_series.at(m_index));
m_chart->setTitle(m_titles.at(m_index));
m_chart->createDefaultAxes();
}
//![4]
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