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/****************************************************************************
**
** Copyright (C) 2013 Research In Motion
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "bbcameraorientationhandler.h"
#include <QAbstractEventDispatcher>
#include <QGuiApplication>
#include <QScreen>
#include <QDebug>
#include <bps/orientation.h>
QT_BEGIN_NAMESPACE
BbCameraOrientationHandler::BbCameraOrientationHandler(QObject *parent)
: QObject(parent)
, m_orientation(0)
{
QCoreApplication::eventDispatcher()->installNativeEventFilter(this);
int result = orientation_request_events(0);
if (result == BPS_FAILURE)
qWarning() << "Unable to register for orientation change events";
orientation_direction_t direction = ORIENTATION_FACE_UP;
int angle = 0;
result = orientation_get(&direction, &angle);
if (result == BPS_FAILURE) {
qWarning() << "Unable to retrieve initial orientation";
} else {
m_orientation = angle;
}
}
BbCameraOrientationHandler::~BbCameraOrientationHandler()
{
#ifndef Q_OS_BLACKBERRY_TABLET
const int result = orientation_stop_events(0);
if (result == BPS_FAILURE)
qWarning() << "Unable to unregister for orientation change events";
#endif
QCoreApplication::eventDispatcher()->removeNativeEventFilter(this);
}
bool BbCameraOrientationHandler::nativeEventFilter(const QByteArray&, void *message, long*)
{
bps_event_t* const event = static_cast<bps_event_t*>(message);
if (!event || bps_event_get_domain(event) != orientation_get_domain())
return false;
const int angle = orientation_event_get_angle(event);
if (angle != m_orientation) {
#ifndef Q_OS_BLACKBERRY_TABLET
if (angle == 180) // The screen does not rotate at 180 degrees
return false;
#endif
m_orientation = angle;
emit orientationChanged(m_orientation);
}
return false; // do not drop the event
}
int BbCameraOrientationHandler::viewfinderOrientation() const
{
// On a keyboard device we do not rotate the screen at all
if (qGuiApp->primaryScreen()->nativeOrientation()
!= qGuiApp->primaryScreen()->primaryOrientation()) {
return m_orientation;
}
return 0;
}
int BbCameraOrientationHandler::orientation() const
{
return m_orientation;
}
QT_END_NAMESPACE
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