HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Files · examples/boxplotchart/boxdatareader.cpp

Fix warning about uninitialized variable...

Fix warning about uninitialized variable Change-Id: Ie4bb39b548622e002258e3e82142f128224332f6 Reviewed-by: Mika Salmela <mika.salmela@digia.com>

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             boxdatareader.cpp
        
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             / examples / boxplotchart / boxdatareader.cpp
          
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        Mika Salmela
    
A new box-and-whiskers series type added to charts....

              r2548
            
      /****************************************************************************

      **

      ** Copyright (C) 2013 Digia Plc

      ** All rights reserved.

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

      **

        Miikka Heikkinen
    
Qt Commercial -> Qt Enterprise...

              r2574
            
      ** This file is part of the Qt Enterprise Charts Add-on.

        Mika Salmela
    
A new box-and-whiskers series type added to charts....

              r2548
            
      **

      ** $QT_BEGIN_LICENSE$

        Miikka Heikkinen
    
Qt Commercial -> Qt Enterprise...

              r2574
            
      ** Licensees holding valid Qt Enterprise licenses may use this file in

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

        Mika Salmela
    
A new box-and-whiskers series type added to charts....

              r2548
            
      ** 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

      ** $QT_END_LICENSE$

      **

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

      #include "boxdatareader.h"

      BoxDataReader::BoxDataReader(QIODevice *device) :

          QTextStream(device)

      {

      }

        Mika Salmela
    
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      void BoxDataReader::readFile(QIODevice *device)

        Mika Salmela
    
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      {

        Mika Salmela
    
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          QTextStream::setDevice(device);

      }

      QBoxSet *BoxDataReader::readBox()

      {

          //! [1]

        Mika Salmela
    
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          QString line = readLine();

          if (line.startsWith("#"))

              return 0;

        Mika Salmela
    
Example finalization and documentation...

              r2556
            
          //! [1]

        Mika Salmela
    
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          //! [2]

        Mika Salmela
    
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          QStringList strList = line.split(" ", QString::SkipEmptyParts);

        Mika Salmela
    
Example finalization and documentation...

              r2556
            
          //! [2]

        Mika Salmela
    
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        Mika Salmela
    
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          //! [3]

          sortedList.clear();

        Mika Salmela
    
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          for (int i = 1; i < strList.count(); i++)

              sortedList.append(strList.at(i).toDouble());

          qSort(sortedList.begin(), sortedList.end());

        Mika Salmela
    
Example finalization and documentation...

              r2556
            
          //! [3]

        Mika Salmela
    
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          int count = sortedList.count();

        Mika Salmela
    
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          //! [4]

        Mika Salmela
    
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          QBoxSet *box = new QBoxSet(strList.first());

          box->setValue(QBoxSet::LowerExtreme, sortedList.first());

          box->setValue(QBoxSet::UpperExtreme, sortedList.last());

          box->setValue(QBoxSet::Median, findMedian(0, count));

          box->setValue(QBoxSet::LowerQuartile, findMedian(0, count / 2));

        Mika Salmela
    
Example finalization and documentation...

              r2556
            
          box->setValue(QBoxSet::UpperQuartile, findMedian(count / 2 + (count % 2), count));

          //! [4]

        Mika Salmela
    
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          return box;

      }

      qreal BoxDataReader::findMedian(int begin, int end)

      {

        Mika Salmela
    
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          //! [5]

        Mika Salmela
    
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          int count = end - begin;

        Mika Salmela
    
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          if (count % 2) {

              return sortedList.at(count / 2 + begin);

        Mika Salmela
    
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          } else {

              qreal right = sortedList.at(count / 2 + begin);

              qreal left = sortedList.at(count / 2 - 1 + begin);

              return (right + left) / 2.0;

          }

        Mika Salmela
    
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          //! [5]

        Mika Salmela
    
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      }

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Mika Salmela A new box-and-whiskers series type added to charts....	r2548	/****************************************************************************
		**
		** Copyright (C) 2013 Digia Plc
		** All rights reserved.
		** For any questions to Digia, please use contact form at http://qt.digia.com
		**
Miikka Heikkinen Qt Commercial -> Qt Enterprise...	r2574	** This file is part of the Qt Enterprise Charts Add-on.
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	**
		** $QT_BEGIN_LICENSE$
Miikka Heikkinen Qt Commercial -> Qt Enterprise...	r2574	** Licensees holding valid Qt Enterprise licenses may use this file in
		** accordance with the Qt Enterprise License Agreement provided with the
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	** 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
		** $QT_END_LICENSE$
		**
		****************************************************************************/

		#include "boxdatareader.h"

		BoxDataReader::BoxDataReader(QIODevice *device) :
		QTextStream(device)
		{
		}

Mika Salmela Example finalization and documentation...	r2556	void BoxDataReader::readFile(QIODevice *device)
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	{
Mika Salmela Example finalization and documentation...	r2556	QTextStream::setDevice(device);
		}

		QBoxSet *BoxDataReader::readBox()
		{
		//! [1]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	QString line = readLine();
		if (line.startsWith("#"))
		return 0;
Mika Salmela Example finalization and documentation...	r2556	//! [1]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548
Mika Salmela Example finalization and documentation...	r2556	//! [2]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	QStringList strList = line.split(" ", QString::SkipEmptyParts);
Mika Salmela Example finalization and documentation...	r2556	//! [2]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548
Mika Salmela Example finalization and documentation...	r2556	//! [3]
		sortedList.clear();
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	for (int i = 1; i < strList.count(); i++)
		sortedList.append(strList.at(i).toDouble());

		qSort(sortedList.begin(), sortedList.end());
Mika Salmela Example finalization and documentation...	r2556	//! [3]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548
		int count = sortedList.count();

Mika Salmela Example finalization and documentation...	r2556	//! [4]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	QBoxSet *box = new QBoxSet(strList.first());
		box->setValue(QBoxSet::LowerExtreme, sortedList.first());
		box->setValue(QBoxSet::UpperExtreme, sortedList.last());
		box->setValue(QBoxSet::Median, findMedian(0, count));
		box->setValue(QBoxSet::LowerQuartile, findMedian(0, count / 2));
Mika Salmela Example finalization and documentation...	r2556	box->setValue(QBoxSet::UpperQuartile, findMedian(count / 2 + (count % 2), count));
		//! [4]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548
		return box;
		}

		qreal BoxDataReader::findMedian(int begin, int end)
		{
Mika Salmela Example finalization and documentation...	r2556	//! [5]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	int count = end - begin;
Mika Salmela Example finalization and documentation...	r2556	if (count % 2) {
		return sortedList.at(count / 2 + begin);
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	} else {
		qreal right = sortedList.at(count / 2 + begin);
		qreal left = sortedList.at(count / 2 - 1 + begin);
		return (right + left) / 2.0;
		}
Mika Salmela Example finalization and documentation...	r2556	//! [5]
Mika Salmela A new box-and-whiskers series type added to charts....	r2548	}