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/****************************************************************************
**
** Copyright (C) 2016 Research In Motion
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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()
{
const int result = orientation_stop_events(0);
if (result == BPS_FAILURE)
qWarning() << "Unable to unregister for orientation change events";
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) {
if (angle == 180) // The screen does not rotate at 180 degrees
return false;
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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