| /**************************************************************************** |
| ** |
| ** 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 "chartview.h" |
| #include <QtCharts/QLineSeries> |
| #include <QtCharts/QScatterSeries> |
| #include <QtCharts/QSplineSeries> |
| #include <QtCharts/QAreaSeries> |
| #include <QtCore/QRandomGenerator> |
| |
| 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 = QRandomGenerator::global()->bounded(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] |