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1 | #include "wavechart.h" | |||
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2 | #include <QApplication> | |||
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3 | #include <QMainWindow> | |||
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4 | #include <QGLWidget> | |||
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5 | ||||
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6 | int main(int argc, char *argv[]) | |||
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7 | { | |||
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8 | QApplication a(argc, argv); | |||
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9 | ||||
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10 | QMainWindow window; | |||
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11 | QChart *chart = new QChart(); | |||
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12 | WaveChart *waveChart = new WaveChart(chart,&window); | |||
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13 | ||||
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14 | waveChart->setViewport( new QGLWidget() ); | |||
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15 | waveChart->setRenderHint(QPainter::Antialiasing); | |||
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16 | chart->setAnimationOptions(QChart::AllAnimations); | |||
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17 | chart->setTitle("This is wave generator."); | |||
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18 | ||||
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19 | window.setCentralWidget(waveChart); | |||
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20 | window.resize(400, 300); | |||
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21 | window.show(); | |||
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22 | ||||
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23 | return a.exec(); | |||
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24 | } | |||
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1 | #include "wavechart.h" | |||
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2 | #include <cmath> | |||
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3 | ||||
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4 | QTCOMMERCIALCHART_USE_NAMESPACE | |||
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5 | ||||
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6 | #define PI 3.14159265358979 | |||
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7 | static const int numPoints =100; | |||
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8 | ||||
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9 | WaveChart::WaveChart(QChart* chart, QWidget* parent) : | |||
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10 | QChartView(chart, parent), | |||
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11 | m_series(new QLineSeries()), | |||
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12 | m_wave(0), | |||
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13 | m_step(2 * PI / numPoints) | |||
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14 | { | |||
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15 | QPen blue(Qt::blue); | |||
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16 | blue.setWidth(3); | |||
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17 | m_series->setPen(blue); | |||
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18 | ||||
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19 | QTime now = QTime::currentTime(); | |||
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20 | qsrand((uint) now.msec()); | |||
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21 | ||||
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22 | int fluctuate = 100; | |||
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23 | ||||
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24 | for (qreal x = 0; x <= 2 * PI; x += m_step) { | |||
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25 | m_series->append(x, fabs(sin(x) * fluctuate)); | |||
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26 | } | |||
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27 | ||||
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28 | chart->addSeries(m_series); | |||
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29 | ||||
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30 | QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(update())); | |||
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31 | m_timer.setInterval(5000); | |||
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32 | m_timer.start(); | |||
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33 | ||||
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34 | } | |||
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35 | ; | |||
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36 | ||||
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37 | void WaveChart::update() | |||
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38 | { | |||
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39 | ||||
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40 | int fluctuate; | |||
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41 | ||||
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42 | for (qreal i = 0, x = 0; x <= 2 * PI; x += m_step, i++) { | |||
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43 | fluctuate = qrand() % 100; | |||
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44 | m_series->replace(x, fabs(sin(x) * fluctuate)); | |||
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45 | ||||
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46 | } | |||
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47 | ||||
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48 | } | |||
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1 | #include <QTimer> | |||
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2 | #include <QTime> | |||
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3 | #include <QObject> | |||
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4 | #include <QLineSeries> | |||
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5 | #include <QChartView> | |||
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6 | ||||
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7 | QTCOMMERCIALCHART_USE_NAMESPACE | |||
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8 | ||||
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9 | class WaveChart: public QChartView | |||
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10 | { | |||
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11 | Q_OBJECT | |||
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12 | ||||
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13 | public: | |||
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14 | WaveChart(QChart* chart, QWidget* parent); | |||
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15 | ||||
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16 | private slots: | |||
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17 | void update(); | |||
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18 | ||||
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19 | private: | |||
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20 | QLineSeries* m_series; | |||
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21 | int m_wave; | |||
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22 | qreal m_step; | |||
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23 | QTimer m_timer; | |||
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24 | }; | |||
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