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| #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 |