sensoritem.h Example File

 /****************************************************************************
 **
 ** Copyright (C) 2017 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."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef QSENSORITEM_H
 #define QSENSORITEM_H

 #include <QtQml/QtQml>
 #include <QtCore/QString>
 #include "propertyinfo.h"

 class QSensor;
 class QSensorItem : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(bool start READ start WRITE setStart NOTIFY startChanged)
     Q_PROPERTY(QString id READ id CONSTANT)
     Q_PROPERTY(QQmlListProperty<QPropertyInfo> properties READ properties NOTIFY propertiesChanged)
 public:
     QSensorItem(QObject* parent = 0);
     QSensorItem(QSensor* sensor, QObject* parent = 0);
     virtual ~QSensorItem();

 public slots:
     void select();
     void unSelect();
     void changePropertyValue(QPropertyInfo* property, const QString& val);

 private slots:
     void sensorReadingChanged();

 private:
     QString id();
     bool start();
     void setStart(bool run);
     QQmlListProperty<QPropertyInfo> properties();
     QString convertValue(const QString& type, const QVariant& val);
     bool isWriteable(const QString& propertyname);
     bool ignoreProperty(const QString& propertyname);
     void updateSensorPropertyValues();

 Q_SIGNALS:
     void propertiesChanged();
     void startChanged();

 private:
     QSensor* _qsensor;
     QList<QPropertyInfo*> _properties;
     QList<QPropertyInfo*> _readerProperties;
     QList<QPropertyInfo*> _sensorProperties;
 };


 QML_DECLARE_TYPE(QSensorItem)

 #endif // QSENSORITEM_H