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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include "chartview.h"
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#include <QtCharts/QLineSeries>
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#include <QtCharts/QScatterSeries>
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#include <QtCharts/QSplineSeries>
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#include <QtCharts/QAreaSeries>
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#include <QtCore/QTime>
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ChartView::ChartView(QChart *chart, QWidget *parent)
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: QChartView(chart, parent),
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m_index(-1),
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m_chart(chart)
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{
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m_chart->setTitle("Charts presenter");
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m_chart->setDropShadowEnabled(false);
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QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(handleTimeout()));
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m_timer.setInterval(3000);
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//![1]
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QLineSeries *series0 = new QLineSeries();
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series0->setName("line");
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QScatterSeries *series1 = new QScatterSeries();
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series1->setName("scatter");
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QSplineSeries *series2 = new QSplineSeries();
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series2->setName("spline");
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QAreaSeries *series3 = new QAreaSeries(series0);
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series3->setName("area");
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//![1]
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//![2]
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int numPoints = 10;
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for (int x = 0; x <= numPoints; ++x) {
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qreal y = qrand() % 100;
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series0->append(x, y);
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series1->append(x, y);
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series2->append(x, y);
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}
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//![2]
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//![3]
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m_series << series0;
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m_titles << m_chart->title() + ": LineChart";
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m_series << series1;
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m_titles << m_chart->title() + ": ScatterChart";
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m_series << series2;
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m_titles << m_chart->title() + ": SplineChart";
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m_series << series3;
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m_titles << m_chart->title() + ": AreaChart";
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//![3]
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m_timer.start();
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handleTimeout();
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}
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ChartView::~ChartView()
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{
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if (m_series.size() == 0)
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return;
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m_chart->removeSeries(m_series.at(m_index));
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m_series.removeLast(); //remove QAreaSeries instance since they will be deleted when QLineSeries instance is gone
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qDeleteAll(m_series);
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}
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//![4]
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void ChartView::handleTimeout()
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{
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if (m_series.size() == 0)
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return;
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if (m_index >= 0)
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m_chart->removeSeries(m_series.at(m_index));
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m_index++;
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m_index = m_index % m_series.size();
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m_chart->addSeries(m_series.at(m_index));
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m_chart->setTitle(m_titles.at(m_index));
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m_chart->createDefaultAxes();
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}
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//![4]
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