OrientationSensor.ReadingChanged Kejadian

Definisi

Ruang nama:

Windows.Devices.Sensors

Terjadi setiap kali sensor orientasi melaporkan pembacaan sensor baru.

// Register
event_token ReadingChanged(TypedEventHandler<OrientationSensor, OrientationSensorReadingChangedEventArgs const&> const& handler) const;

// Revoke with event_token
void ReadingChanged(event_token const* cookie) const;

// Revoke with event_revoker
OrientationSensor::ReadingChanged_revoker ReadingChanged(auto_revoke_t, TypedEventHandler<OrientationSensor, OrientationSensorReadingChangedEventArgs const&> const& handler) const;

public event TypedEventHandler<OrientationSensor,OrientationSensorReadingChangedEventArgs> ReadingChanged;

function onReadingChanged(eventArgs) { /* Your code */ }
orientationSensor.addEventListener("readingchanged", onReadingChanged);
orientationSensor.removeEventListener("readingchanged", onReadingChanged);
- or -
orientationSensor.onreadingchanged = onReadingChanged;

Public Custom Event ReadingChanged As TypedEventHandler(Of OrientationSensor, OrientationSensorReadingChangedEventArgs) 

Jenis Acara

TypedEventHandler<OrientationSensor,OrientationSensorReadingChangedEventArgs>

Contoh

Contoh berikut menunjukkan bagaimana aplikasi UWP yang dibangun dengan C# dan XAML mendaftarkan penanganan aktivitas ReadingChanged-nya .

private void ScenarioEnable(object sender, RoutedEventArgs e)
{
    if (_sensor != null)
    {
        // Establish the report interval
        _sensor.ReportInterval = _desiredReportInterval;

        Window.Current.VisibilityChanged += new WindowVisibilityChangedEventHandler(VisibilityChanged);
        _sensor.ReadingChanged += new TypedEventHandler<OrientationSensor, OrientationSensorReadingChangedEventArgs>(ReadingChanged);

        ScenarioEnableButton.IsEnabled = false;
        ScenarioDisableButton.IsEnabled = true;
    }
    else
    {
        rootPage.NotifyUser("No orientation sensor found", NotifyType.StatusMessage);
    }
}

Contoh berikut menunjukkan penanganan aktivitas ReadingChanged .

async private void ReadingChanged(object sender, OrientationSensorReadingChangedEventArgs e)
{
    await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        OrientationSensorReading reading = e.Reading;

        // Quaternion values
        SensorQuaternion quaternion = reading.Quaternion;   // get a reference to the object to avoid re-creating it for each access
        ScenarioOutput_X.Text = String.Format("{0,8:0.00000}", quaternion.X);
        ScenarioOutput_Y.Text = String.Format("{0,8:0.00000}", quaternion.Y);
        ScenarioOutput_Z.Text = String.Format("{0,8:0.00000}", quaternion.Z);
        ScenarioOutput_W.Text = String.Format("{0,8:0.00000}", quaternion.W);

        // Rotation Matrix values
        SensorRotationMatrix rotationMatrix = reading.RotationMatrix;
        ScenarioOutput_M11.Text = String.Format("{0,8:0.00000}", rotationMatrix.M11);
        ScenarioOutput_M12.Text = String.Format("{0,8:0.00000}", rotationMatrix.M12);
        ScenarioOutput_M13.Text = String.Format("{0,8:0.00000}", rotationMatrix.M13);
        ScenarioOutput_M21.Text = String.Format("{0,8:0.00000}", rotationMatrix.M21);
        ScenarioOutput_M22.Text = String.Format("{0,8:0.00000}", rotationMatrix.M22);
        ScenarioOutput_M23.Text = String.Format("{0,8:0.00000}", rotationMatrix.M23);
        ScenarioOutput_M31.Text = String.Format("{0,8:0.00000}", rotationMatrix.M31);
        ScenarioOutput_M32.Text = String.Format("{0,8:0.00000}", rotationMatrix.M32);
        ScenarioOutput_M33.Text = String.Format("{0,8:0.00000}", rotationMatrix.M33);
    });
}

Keterangan

Aplikasi dapat mendaftarkan penanganan aktivitas ini untuk mendapatkan pembacaan sensor. Aplikasi harus membuat ReportInterval yang diinginkan. Ini menginformasikan driver sensor bahwa sumber daya harus dialokasikan untuk memenuhi persyaratan aplikasi.

OrientationSensor mengembalikan quaternion dan matriks rotasi.