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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 <cmath> | |||
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5 | #include <qxychartseries.h> | |||
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6 | ||||
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7 | QTCOMMERCIALCHART_USE_NAMESPACE | |||
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8 | ||||
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9 | #define PI 3.14159265358979 | |||
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10 | static const int numPoints =100; | |||
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11 | ||||
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12 | class WaveGenerator: public QObject | |||
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13 | { | |||
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14 | Q_OBJECT | |||
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15 | ||||
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16 | public: | |||
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17 | WaveGenerator(QXYChartSeries* series1, QXYChartSeries* series2) : | |||
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18 | m_series1(series1), | |||
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19 | m_series2(series2), | |||
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20 | m_wave(0), | |||
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21 | m_step(2*PI/numPoints) | |||
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22 | { | |||
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23 | ||||
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24 | QTime now = QTime::currentTime(); | |||
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25 | qsrand((uint)now.msec()); | |||
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26 | ||||
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27 | int fluctuate = 100; | |||
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28 | ||||
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29 | for (qreal x = 0; x <= 2*PI; x+=m_step) { | |||
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30 | series1->add(x, fabs(sin(x)*fluctuate)); | |||
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31 | series2->add(x, fabs(cos(x)*fluctuate)); | |||
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32 | } | |||
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33 | ||||
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34 | QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(update())); | |||
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35 | m_timer.setInterval(5000); | |||
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36 | m_timer.start(); | |||
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37 | ||||
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38 | }; | |||
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39 | ||||
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40 | public slots: | |||
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41 | void update() | |||
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42 | { | |||
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43 | int fluctuate; | |||
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44 | ||||
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45 | for (qreal i = 0, x = 0; x <= 2*PI; x+=m_step, i++) { | |||
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46 | fluctuate = qrand() % 100; | |||
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47 | m_series1->set(i, x, fabs(sin(x)*fluctuate)); | |||
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48 | fluctuate = qrand() % 100; | |||
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49 | m_series2->set(i, x, fabs(cos(x)*fluctuate)); | |||
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50 | } | |||
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51 | ||||
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52 | } | |||
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53 | ||||
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54 | private: | |||
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55 | QXYChartSeries* m_series1; | |||
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56 | QXYChartSeries* m_series2; | |||
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57 | int m_wave; | |||
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58 | qreal m_step; | |||
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59 | QTimer m_timer; | |||
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60 | }; | |||
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