chartview.cpp
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r0 | /**************************************************************************** | ||
| ** | ||||
| ** 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/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] | ||||