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

QSplineSeries calculateControlPoints moved to splinechartitem. This way we don't need to deal with controlPoints on logaritmic scale

Marek Rosa - - Load All Authors

File last commit:

r2214:0a3cbf6ad29b


                r2372:d6a999e30ac3

Download file

             xyseriesiodevice.cpp
        
                    37 lines
            
             | 966 B
            
                | text/x-c
            
             |
                CppLexer
            
             / demos / audio / xyseriesiodevice.cpp
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      #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;

      }

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				#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;
				}