main.cpp
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| text/x-c
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CppLexer
winter
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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 "datasource.h" | ||||
#include <QtWidgets/QApplication> | ||||
#include <QtWidgets/QMainWindow> | ||||
#include <QtCharts/QChartView> | ||||
#include <QtCharts/QLineSeries> | ||||
#include <QtCharts/QScatterSeries> | ||||
#include <QtCharts/QValueAxis> | ||||
#include <QtCharts/QLogValueAxis> | ||||
#include <QtWidgets/QLabel> | ||||
// Uncomment to use logarithmic axes instead of regular value axes | ||||
//#define USE_LOG_AXIS | ||||
// Uncomment to use regular series instead of OpenGL accelerated series | ||||
//#define DONT_USE_GL_SERIES | ||||
// Uncomment to add a simple regular series (thick line) and a matching OpenGL series (thinner line) | ||||
// to verify the series have same visible geometry. | ||||
//#define ADD_SIMPLE_SERIES | ||||
QT_CHARTS_USE_NAMESPACE | ||||
int main(int argc, char *argv[]) | ||||
{ | ||||
QApplication a(argc, argv); | ||||
QStringList colors; | ||||
colors << "red" << "blue" << "green" << "black"; | ||||
QChart *chart = new QChart(); | ||||
chart->legend()->hide(); | ||||
#ifdef USE_LOG_AXIS | ||||
QLogValueAxis *axisX = new QLogValueAxis; | ||||
QLogValueAxis *axisY = new QLogValueAxis; | ||||
#else | ||||
QValueAxis *axisX = new QValueAxis; | ||||
QValueAxis *axisY = new QValueAxis; | ||||
#endif | ||||
chart->addAxis(axisX, Qt::AlignBottom); | ||||
chart->addAxis(axisY, Qt::AlignLeft); | ||||
const int seriesCount = 2; | ||||
#ifdef DONT_USE_GL_SERIES | ||||
const int pointCount = 100; | ||||
chart->setTitle("Unaccelerated Series"); | ||||
#else | ||||
const int pointCount = 1000000; | ||||
chart->setTitle("OpenGL Accelerated Series"); | ||||
#endif | ||||
QList<QXYSeries *> seriesList; | ||||
for (int i = 0; i < seriesCount; i++) { | ||||
QXYSeries *series = 0; | ||||
int colorIndex = i % colors.size(); | ||||
if (i % 2) { | ||||
series = new QScatterSeries; | ||||
QScatterSeries *scatter = static_cast<QScatterSeries *>(series); | ||||
scatter->setColor(QColor(colors.at(colorIndex))); | ||||
scatter->setMarkerSize(qreal(colorIndex + 2) / 2.0); | ||||
// Scatter pen doesn't have affect in OpenGL drawing, but if you disable OpenGL drawing | ||||
// this makes the marker border visible and gives comparable marker size to OpenGL | ||||
// scatter points. | ||||
scatter->setPen(QPen("black")); | ||||
} else { | ||||
series = new QLineSeries; | ||||
series->setPen(QPen(QBrush(QColor(colors.at(colorIndex))), | ||||
qreal(colorIndex + 2) / 2.0)); | ||||
} | ||||
seriesList.append(series); | ||||
#ifdef DONT_USE_GL_SERIES | ||||
series->setUseOpenGL(false); | ||||
#else | ||||
//![1] | ||||
series->setUseOpenGL(true); | ||||
//![1] | ||||
#endif | ||||
chart->addSeries(series); | ||||
series->attachAxis(axisX); | ||||
series->attachAxis(axisY); | ||||
} | ||||
if (axisX->type() == QAbstractAxis::AxisTypeLogValue) | ||||
axisX->setRange(0.1, 20.0); | ||||
else | ||||
axisX->setRange(0, 20.0); | ||||
if (axisY->type() == QAbstractAxis::AxisTypeLogValue) | ||||
axisY->setRange(0.1, 10.0); | ||||
else | ||||
axisY->setRange(0, 10.0); | ||||
#ifdef ADD_SIMPLE_SERIES | ||||
QLineSeries *simpleRasterSeries = new QLineSeries; | ||||
*simpleRasterSeries << QPointF(0.001, 0.001) | ||||
<< QPointF(2.5, 8.0) | ||||
<< QPointF(5.0, 4.0) | ||||
<< QPointF(7.5, 9.0) | ||||
<< QPointF(10.0, 0.001) | ||||
<< QPointF(12.5, 2.0) | ||||
<< QPointF(15.0, 1.0) | ||||
<< QPointF(17.5, 6.0) | ||||
<< QPointF(20.0, 10.0); | ||||
simpleRasterSeries->setUseOpenGL(false); | ||||
simpleRasterSeries->setPen(QPen(QBrush("magenta"), 8)); | ||||
chart->addSeries(simpleRasterSeries); | ||||
simpleRasterSeries->attachAxis(axisX); | ||||
simpleRasterSeries->attachAxis(axisY); | ||||
QLineSeries *simpleGLSeries = new QLineSeries; | ||||
simpleGLSeries->setUseOpenGL(true); | ||||
simpleGLSeries->setPen(QPen(QBrush("black"), 2)); | ||||
simpleGLSeries->replace(simpleRasterSeries->points()); | ||||
chart->addSeries(simpleGLSeries); | ||||
simpleGLSeries->attachAxis(axisX); | ||||
simpleGLSeries->attachAxis(axisY); | ||||
#endif | ||||
QChartView *chartView = new QChartView(chart); | ||||
QMainWindow window; | ||||
window.setCentralWidget(chartView); | ||||
window.resize(600, 400); | ||||
window.show(); | ||||
DataSource dataSource; | ||||
dataSource.generateData(seriesCount, 10, pointCount); | ||||
QLabel *fpsLabel = new QLabel(&window); | ||||
QLabel *countLabel = new QLabel(&window); | ||||
QString countText = QStringLiteral("Total point count: %1"); | ||||
countLabel->setText(countText.arg(pointCount * seriesCount)); | ||||
countLabel->adjustSize(); | ||||
fpsLabel->move(10, 2); | ||||
fpsLabel->adjustSize(); | ||||
fpsLabel->raise(); | ||||
fpsLabel->show(); | ||||
countLabel->move(10, fpsLabel->height()); | ||||
fpsLabel->raise(); | ||||
countLabel->show(); | ||||
// We can get more than one changed event per frame, so do async update. | ||||
// This also allows the application to be responsive. | ||||
QObject::connect(chart->scene(), &QGraphicsScene::changed, | ||||
&dataSource, &DataSource::handleSceneChanged); | ||||
dataSource.startUpdates(seriesList, fpsLabel); | ||||
return a.exec(); | ||||
} | ||||