HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Files · demos/qmloscilloscope/datasource.h

Added a new QXYSeries::replace override for performance reasons....

Added a new QXYSeries::replace override for performance reasons. Also added a QML demo application for oscilloscope use case. Oscilloscope use case was selected, because it involves a lot of data and has a strict requirements for performance. It revealed performance issues in data handling in QXYSeries, painting of QLineSeries and updating data in a model.

Tero Ahola - - Load All Authors

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             datasource.h
        
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      /****************************************************************************

      **

      ** Copyright (C) 2012 Digia Plc

      ** All rights reserved.

      ** For any questions to Digia, please use contact form at http://qt.digia.com

      **

      ** This file is part of the Qt Commercial Charts Add-on.

      **

      ** $QT_BEGIN_LICENSE$

      ** Licensees holding valid Qt Commercial licenses may use this file in

      ** accordance with the Qt Commercial License Agreement provided with the

      ** Software or, alternatively, in accordance with the terms contained in

      ** a written agreement between you and Digia.

      **

      ** If you have questions regarding the use of this file, please use

      ** contact form at http://qt.digia.com

      ** $QT_END_LICENSE$

      **

      ****************************************************************************/

      #ifndef DATASOURCE_H

      #define DATASOURCE_H

      #include <QObject>

      #include <QAbstractSeries>

      QTCOMMERCIALCHART_USE_NAMESPACE

      class DataSource : public QObject

      {

          Q_OBJECT

      public:

          explicit DataSource(QObject *parent = 0);

      signals:

      public slots:

          void update(QAbstractSeries *series);

      private:

          QList<QList<QPointF> > m_data;

          int m_index;

      };

      #endif // DATASOURCE_H

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				/****************************************************************************
				**
				** Copyright (C) 2012 Digia Plc
				** All rights reserved.
				** For any questions to Digia, please use contact form at http://qt.digia.com
				**
				** This file is part of the Qt Commercial Charts Add-on.
				**
				** $QT_BEGIN_LICENSE$
				** Licensees holding valid Qt Commercial licenses may use this file in
				** accordance with the Qt Commercial License Agreement provided with the
				** Software or, alternatively, in accordance with the terms contained in
				** a written agreement between you and Digia.
				**
				** If you have questions regarding the use of this file, please use
				** contact form at http://qt.digia.com
				** $QT_END_LICENSE$
				**
				****************************************************************************/

				#ifndef DATASOURCE_H
				#define DATASOURCE_H

				#include <QObject>
				#include <QAbstractSeries>

				QTCOMMERCIALCHART_USE_NAMESPACE

				class DataSource : public QObject
				{
				Q_OBJECT
				public:
				explicit DataSource(QObject *parent = 0);

				signals:

				public slots:
				void update(QAbstractSeries *series);

				private:
				QList<QList<QPointF> > m_data;
				int m_index;
				};

				#endif // DATASOURCE_H