/**************************************************************************** ** ** Copyright (C) 2013 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 ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "boxdatareader.h" BoxDataReader::BoxDataReader(QIODevice *device) : QTextStream(device) { } void BoxDataReader::readFile(QIODevice *device) { QTextStream::setDevice(device); } QBoxSet *BoxDataReader::readBox() { //! [1] QString line = readLine(); if (line.startsWith("#")) return 0; //! [1] //! [2] QStringList strList = line.split(" ", QString::SkipEmptyParts); //! [2] //! [3] sortedList.clear(); for (int i = 1; i < strList.count(); i++) sortedList.append(strList.at(i).toDouble()); qSort(sortedList.begin(), sortedList.end()); //! [3] int count = sortedList.count(); //! [4] 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)); box->setValue(QBoxSet::UpperQuartile, findMedian(count / 2 + (count % 2), count)); //! [4] return box; } qreal BoxDataReader::findMedian(int begin, int end) { //! [5] int count = end - begin; if (count % 2) { return sortedList.at(count / 2 + begin); } else { qreal right = sortedList.at(count / 2 + begin); qreal left = sortedList.at(count / 2 - 1 + begin); return (right + left) / 2.0; } //! [5] }