HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Files · demos/audio/xyseriesiodevice.cpp

Added a note in docs about not plotting series with log axis...

Added a note in docs about not plotting series with log axis If a series contains zero on negative values along an attached log dimension, the entire series will not be plotted. Documented this fact. Task-number: QTRD-1916

Marek Rosa - - Load All Authors

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             xyseriesiodevice.cpp
        
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      #include "xyseriesiodevice.h"

      #include <QXYSeries>

      XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :

          QIODevice(parent),

          m_series(series)

      {

      }

      qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)

      {

          Q_UNUSED(data)

          Q_UNUSED(maxSize)

          return -1;

      }

      qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)

      {

          qint64 range = 2000;

          QList<QPointF> oldPoints = m_series->points();

          QList<QPointF> points;

          int resolution = 4;

          if (oldPoints.count() < range) {

              points = m_series->points();

          } else {

              for (int i = maxSize/resolution; i < oldPoints.count(); i++)

                  points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y()));

          }

          qint64 size = points.count();

          for (int k = 0; k < maxSize/resolution; k++)

              points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0));

          m_series->replace(points);

          return maxSize;

      }

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				#include "xyseriesiodevice.h"
				#include <QXYSeries>

				XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :
				QIODevice(parent),
				m_series(series)
				{
				}

				qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)
				{
				Q_UNUSED(data)
				Q_UNUSED(maxSize)
				return -1;
				}

				qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)
				{
				qint64 range = 2000;
				QList<QPointF> oldPoints = m_series->points();
				QList<QPointF> points;
				int resolution = 4;

				if (oldPoints.count() < range) {
				points = m_series->points();
				} else {
				for (int i = maxSize/resolution; i < oldPoints.count(); i++)
				points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y()));
				}

				qint64 size = points.count();
				for (int k = 0; k < maxSize/resolution; k++)
				points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0));

				m_series->replace(points);
				return maxSize;
				}