HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Files · examples/dynamiclinechart/wavegenerator.h

Fix piechartdrilldown bug. Chart was deleting the series from us.

Michal Klocek - - Load All Authors

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             wavegenerator.h
        
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      #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;

      };

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				#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;
				};