qt-creator/share/qtcreator/qml/qmlobserver/deviceorientation.h

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#ifndef ORIENTATION_H
#define ORIENTATION_H

#include <QObject>

QT_BEGIN_NAMESPACE

class DeviceOrientationPrivate;
class DeviceOrientation : public QObject
{
    Q_OBJECT
    Q_ENUMS(Orientation)
public:
    enum Orientation {
        UnknownOrientation,
        Portrait,
        Landscape,
        PortraitInverted,
        LandscapeInverted
    };

    virtual Orientation orientation() const = 0;
    virtual void setOrientation(Orientation) = 0;

    virtual void pauseListening() = 0;
    virtual void resumeListening() = 0;

    static DeviceOrientation *instance();

signals:
    void orientationChanged();

protected:
    DeviceOrientation() {}

private:
    DeviceOrientationPrivate *d_ptr;
    friend class DeviceOrientationPrivate;
};

QT_END_NAMESPACE

#endif