|
|
#include <QTimer>
|
|
|
#include <QTime>
|
|
|
#include <QObject>
|
|
|
#include <cmath>
|
|
|
#include <qlinechartseries.h>
|
|
|
|
|
|
QTCOMMERCIALCHART_USE_NAMESPACE
|
|
|
|
|
|
#define PI 3.14159265358979
|
|
|
static const int numPoints =100;
|
|
|
|
|
|
class WaveGenerator: public QObject
|
|
|
{
|
|
|
Q_OBJECT
|
|
|
|
|
|
public:
|
|
|
WaveGenerator(QLineChartSeries* series1, QLineChartSeries* 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->set(i, x, fabs(sin(x)*fluctuate));
|
|
|
fluctuate = qrand() % 100;
|
|
|
m_series2->set(i, x, fabs(cos(x)*fluctuate));
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
private:
|
|
|
QLineChartSeries* m_series1;
|
|
|
QLineChartSeries* m_series2;
|
|
|
int m_wave;
|
|
|
qreal m_step;
|
|
|
QTimer m_timer;
|
|
|
};
|
|
|
|
