explorer.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtSensors module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** "Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
  **     distribution.
  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #include "explorer.h"
  #include <QtCore/QDebug>
  #include <qsensor.h>
  #include <QMetaObject>
  #include <QMetaProperty>

  /*
      \class QSensorExplorer
      \brief The QSensorExplorer type provides an easy access for reading all avalaible sensors installed on the system.
  */

  /*
      Construct a QSensorExplorer object with parent \a parent
  */
  QSensorExplorer::QSensorExplorer(QObject* parent)
      : QObject(parent)
      , _selectedSensorItem(0)
  {
      loadSensors();
  }

  /*
      Destructor of a QSensorExplorer
  */
  QSensorExplorer::~QSensorExplorer()
  {
  }

  /*
      Load all available sensors and store it in a list.
  */
  void QSensorExplorer::loadSensors()
  {
      _availableSensors.clear();

      foreach (const QByteArray &type, QSensor::sensorTypes()) {
          qDebug() << "Found type" << type;
          foreach (const QByteArray &identifier, QSensor::sensorsForType(type)) {
              qDebug() << "Found identifier" << identifier;
              // Don't put in sensors we can't connect to
              QSensor* sensor = new QSensor(type, this);
              sensor->setIdentifier(identifier);
              if (!sensor->connectToBackend()) {
                  qDebug() << "Couldn't connect to" << identifier;
                  continue;
              }

              qDebug() << "Adding identifier" << identifier;
              _availableSensors.append(new QSensorItem(sensor, this));
          }
      }
      emit availableSensorsChanged();
  }

  /*
      \fn QSensorExplorer::availableSensorsChanged()
      Notifies the client if the list of the available sensors was changed
  */

  /*
      \property QSensorExplorer::availableSensors
      Returns a list of all available sensor.
  */
  QQmlListProperty<QSensorItem> QSensorExplorer::availableSensors()
  {
      return QQmlListProperty<QSensorItem>(this,_availableSensors);
  }

  /*
      \fn QSensorExplorer::selectedSensorItemChanged()
      Notifies the client if the selected sensor has been changed
  */

  /*
      \property QSensorExplorer::selectedSensorItem
      Returns the current selected sensor item.
  */
  QSensorItem* QSensorExplorer::selectedSensorItem()
  {
      return _selectedSensorItem;
  }

  /*
      \fn QSensorExplorer::setSelectedSensorItem(QSensorItem* selitem)
      Sets the QSensorItem \a selitem as the current selected QSensorItem.
  */
  void QSensorExplorer::setSelectedSensorItem(QSensorItem* selitem)
  {
      if (selitem  && _selectedSensorItem != selitem) {
          if (_selectedSensorItem)
              _selectedSensorItem->unSelect();
          _selectedSensorItem = selitem;
          _selectedSensorItem->select();
          emit selectedSensorItemChanged();
      }
  }