##// END OF EJS Templates
missing #ifndef's in themes
missing #ifndef's in themes

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wavegenerator.h
60 lines | 1.3 KiB | text/x-c | CLexer
#include <QTimer>
#include <QTime>
#include <QObject>
#include <cmath>
#include <qlineseries.h>
QTCOMMERCIALCHART_USE_NAMESPACE
#define PI 3.14159265358979
static const int numPoints =100;
class WaveGenerator: public QObject
{
Q_OBJECT
public:
WaveGenerator(QLineSeries* series1, QLineSeries* series2) :
m_series1(series1),
m_series2(series2),
m_wave(0),
m_step(2*PI/numPoints)
{
QTime now = QTime::currentTime();
qsrand((uint)now.msec());
int fluctuate = 100;
for (qreal x = 0; x <= 2*PI; x+=m_step) {
series1->add(x, fabs(sin(x)*fluctuate));
series2->add(x, fabs(cos(x)*fluctuate));
}
QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(update()));
m_timer.setInterval(5000);
m_timer.start();
};
public slots:
void update()
{
int fluctuate;
for (qreal i = 0, x = 0; x <= 2*PI; x+=m_step, i++) {
fluctuate = qrand() % 100;
m_series1->replace(x, fabs(sin(x)*fluctuate));
fluctuate = qrand() % 100;
m_series2->replace(x, fabs(cos(x)*fluctuate));
}
}
private:
QLineSeries* m_series1;
QLineSeries* m_series2;
int m_wave;
qreal m_step;
QTimer m_timer;
};