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GH-245: Add Orientation Sensor #249

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May 14, 2018
Merged

GH-245: Add Orientation Sensor #249

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46bf5cb
Add Orientation Sensor
May 12, 2018
47f2e50
Add Orientation Sensor
May 12, 2018
fd9c662
Remove .csproj clutter
May 12, 2018
67d055c
"orientationsensor" --> "orientation sensor" or just "orientation"
May 13, 2018
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2 changes: 1 addition & 1 deletion Samples/Samples/Samples.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@
<ItemGroup>
<ProjectReference Include="..\..\Xamarin.Essentials\Xamarin.Essentials.csproj" />
</ItemGroup>

<Import Project="$(MSBuildThisFileDirectory)..\..\CodeStyles.targets" />

</Project>
35 changes: 35 additions & 0 deletions Samples/Samples/View/AllSensorsPage.xaml
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Expand Up @@ -141,6 +141,41 @@
<Button Grid.Row="5" Grid.Column="1" Text="Stop" Command="{Binding StopCommand}"
IsEnabled="{Binding IsActive}" />
</Grid>

<Label Text="Orientation Sensor" FontAttributes="Bold" Margin="0,6,0,0" />
<Grid>
<Grid.BindingContext>
<viewmodels:OrientationSensorViewModel />
</Grid.BindingContext>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>

<Label Grid.Row="0" Grid.ColumnSpan="2" Text="{Binding X, StringFormat='X: {0:N}'}" />
<Label Grid.Row="1" Grid.ColumnSpan="2" Text="{Binding Y, StringFormat='Y: {0:N}'}" />
<Label Grid.Row="2" Grid.ColumnSpan="2" Text="{Binding Z, StringFormat='Z: {0:N}'}" />
<Label Grid.Row="3" Grid.ColumnSpan="2" Text="{Binding W, StringFormat='W: {0:N}'}" />

<Picker Grid.Row="4" Grid.ColumnSpan="2" HorizontalOptions="FillAndExpand"
ItemsSource="{Binding Speeds}"
SelectedIndex="{Binding Speed, Mode=TwoWay}"
IsEnabled="{Binding IsActive, Converter={StaticResource NegativeConverter}}" />

<Button Grid.Row="5" Grid.Column="0" Text="Start" Command="{Binding StartCommand}"
IsEnabled="{Binding IsActive, Converter={StaticResource NegativeConverter}}" />

<Button Grid.Row="5" Grid.Column="1" Text="Stop" Command="{Binding StopCommand}"
IsEnabled="{Binding IsActive}" />
</Grid>
</StackLayout>
</ScrollView>
</StackLayout>
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50 changes: 50 additions & 0 deletions Samples/Samples/View/OrientationSensorPage.xaml
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@@ -0,0 +1,50 @@
<?xml version="1.0" encoding="utf-8" ?>
<views:BasePage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:views="clr-namespace:Samples.View"
xmlns:viewmodels="clr-namespace:Samples.ViewModel"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="Samples.View.OrientationSensorPage"
Title="Orientation Sensor">
<views:BasePage.BindingContext>
<viewmodels:OrientationSensorViewModel />
</views:BasePage.BindingContext>

<StackLayout>
<Label Text="Retrieve orientation of the device in 3D space." FontAttributes="Bold" Margin="12" />

<ScrollView>
<Grid Padding="12,0,12,12">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>

<Label Grid.Row="0" Grid.ColumnSpan="2" Text="{Binding X, StringFormat='X: {0:N}'}" />
<Label Grid.Row="1" Grid.ColumnSpan="2" Text="{Binding Y, StringFormat='Y: {0:N}'}" />
<Label Grid.Row="2" Grid.ColumnSpan="2" Text="{Binding Z, StringFormat='Z: {0:N}'}" />
<Label Grid.Row="3" Grid.ColumnSpan="2" Text="{Binding W, StringFormat='W: {0:N}'}" />

<Picker Grid.Row="4" Grid.ColumnSpan="2" HorizontalOptions="FillAndExpand"
ItemsSource="{Binding Speeds}"
SelectedIndex="{Binding Speed, Mode=TwoWay}"
IsEnabled="{Binding IsActive, Converter={StaticResource NegativeConverter}}" />

<Button Grid.Row="5" Grid.Column="0" Text="Start" Command="{Binding StartCommand}"
IsEnabled="{Binding IsActive, Converter={StaticResource NegativeConverter}}" />

<Button Grid.Row="5" Grid.Column="1" Text="Stop" Command="{Binding StopCommand}"
IsEnabled="{Binding IsActive}" />
</Grid>
</ScrollView>
</StackLayout>

</views:BasePage>
10 changes: 10 additions & 0 deletions Samples/Samples/View/OrientationSensorPage.xaml.cs
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@@ -0,0 +1,10 @@
namespace Samples.View
{
public partial class OrientationSensorPage : BasePage
{
public OrientationSensorPage()
{
InitializeComponent();
}
}
}
10 changes: 8 additions & 2 deletions Samples/Samples/ViewModel/HomeViewModel.cs
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Expand Up @@ -28,8 +28,8 @@ public HomeViewModel()
"📏",
"All Sensors",
typeof(AllSensorsPage),
"Have a look at the accelerometer, compass, gyroscope and magnetometer.",
new[] { "accelerometer", "compass", "gyroscope", "magnetometer", "sensors", "hardware", "device" }),
"Have a look at the accelerometer, compass, gyroscope, magnetometer, and orientation sensors.",
new[] { "accelerometer", "compass", "gyroscope", "magnetometer", "orientation", "sensors", "hardware", "device" }),
new SampleItem(
"📦",
"App Info",
Expand Down Expand Up @@ -120,6 +120,12 @@ public HomeViewModel()
typeof(MagnetometerPage),
"Detect device's orientation relative to Earth's magnetic field.",
new[] { "compass", "magnetometer", "sensors", "hardware", "device" }),
new SampleItem(
"📏",
"Orientation Sensor",
typeof(OrientationSensorPage),
"Retrieve orientation of the device in 3D space.",
new[] { "orientation", "sensors", "hardware", "device" }),
new SampleItem(
"📞",
"Phone Dialer",
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130 changes: 130 additions & 0 deletions Samples/Samples/ViewModel/OrientationSensorViewModel.cs
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using System;
using System.Collections.Generic;
using System.Windows.Input;
using Xamarin.Essentials;
using Xamarin.Forms;

namespace Samples.ViewModel
{
class OrientationSensorViewModel : BaseViewModel
{
double x;
double y;
double z;
double w;
bool isActive;
int speed = 2;

public OrientationSensorViewModel()
{
StartCommand = new Command(OnStart);
StopCommand = new Command(OnStop);
}

public ICommand StartCommand { get; }

public ICommand StopCommand { get; }

public double X
{
get => x;
set => SetProperty(ref x, value);
}

public double Y
{
get => y;
set => SetProperty(ref y, value);
}

public double Z
{
get => z;
set => SetProperty(ref z, value);
}

public double W
{
get => w;
set => SetProperty(ref w, value);
}

public bool IsActive
{
get => isActive;
set => SetProperty(ref isActive, value);
}

public List<string> Speeds { get; } =
new List<string>
{
"Fastest",
"Game",
"Normal",
"User Interface"
};

public int Speed
{
get => speed;
set => SetProperty(ref speed, value);
}

public override void OnAppearing()
{
OrientationSensor.ReadingChanged += OnReadingChanged;
base.OnAppearing();
}

public override void OnDisappearing()
{
OnStop();
OrientationSensor.ReadingChanged -= OnReadingChanged;

base.OnDisappearing();
}

async void OnStart()
{
try
{
OrientationSensor.Start((SensorSpeed)Speed);
IsActive = true;
}
catch (Exception ex)
{
await DisplayAlertAsync($"Unable to start orientation sensor: {ex.Message}");
}
}

void OnStop()
{
IsActive = false;
Accelerometer.Stop();
}

void OnReadingChanged(OrientationSensorChangedEventArgs e)
{
var data = e.Reading;
switch ((SensorSpeed)Speed)
{
case SensorSpeed.Fastest:
case SensorSpeed.Game:
Platform.BeginInvokeOnMainThread(() =>
{
X = data.Orientation.X;
Y = data.Orientation.Y;
Z = data.Orientation.Z;
W = data.Orientation.W;
});
break;
default:
X = data.Orientation.X;
Y = data.Orientation.Y;
Z = data.Orientation.Z;
W = data.Orientation.W;
break;
}
}
}
}
65 changes: 65 additions & 0 deletions Xamarin.Essentials/OrientationSensor/OrientationSensor.android.cs
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using Android.Hardware;
using Android.Runtime;

namespace Xamarin.Essentials
{
public static partial class OrientationSensor
{
internal static bool IsSupported =>
Platform.SensorManager?.GetDefaultSensor(SensorType.RotationVector) != null;

static OrientationSensorListener listener;
static Sensor orientationSensor;

internal static void PlatformStart(SensorSpeed sensorSpeed)
{
var delay = SensorDelay.Normal;
switch (sensorSpeed)
{
case SensorSpeed.Normal:
delay = SensorDelay.Normal;
break;
case SensorSpeed.Fastest:
delay = SensorDelay.Fastest;
break;
case SensorSpeed.Game:
delay = SensorDelay.Game;
break;
case SensorSpeed.Ui:
delay = SensorDelay.Ui;
break;
}

listener = new OrientationSensorListener();
orientationSensor = Platform.SensorManager.GetDefaultSensor(SensorType.RotationVector);
Platform.SensorManager.RegisterListener(listener, orientationSensor, delay);
}

internal static void PlatformStop()
{
if (listener == null || orientationSensor == null)
return;

Platform.SensorManager.UnregisterListener(listener, orientationSensor);
listener.Dispose();
listener = null;
}
}

class OrientationSensorListener : Java.Lang.Object, ISensorEventListener
{
internal OrientationSensorListener()
{
}

void ISensorEventListener.OnAccuracyChanged(Sensor sensor, [GeneratedEnum] SensorStatus accuracy)
{
}

void ISensorEventListener.OnSensorChanged(SensorEvent e)
{
var data = new OrientationSensorData(e.Values[0], e.Values[1], e.Values[2], e.Values[3]);
OrientationSensor.OnChanged(data);
}
}
}
53 changes: 53 additions & 0 deletions Xamarin.Essentials/OrientationSensor/OrientationSensor.ios.cs
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using CoreMotion;
using Foundation;

namespace Xamarin.Essentials
{
public static partial class OrientationSensor
{
// Timing intervales to match android sensor speeds in seconds
// https://stackoverflow.com/questions/10044158/android-sensors
internal const double FastestInterval = .02;
internal const double GameInterval = .04;
internal const double UiInterval = .08;
internal const double NormalInterval = .225;

internal static bool IsSupported =>
Platform.MotionManager?.DeviceMotionAvailable ?? false;

internal static void PlatformStart(SensorSpeed sensorSpeed)
{
var manager = Platform.MotionManager;
switch (sensorSpeed)
{
case SensorSpeed.Fastest:
manager.DeviceMotionUpdateInterval = FastestInterval;
break;
case SensorSpeed.Game:
manager.DeviceMotionUpdateInterval = GameInterval;
break;
case SensorSpeed.Normal:
manager.DeviceMotionUpdateInterval = NormalInterval;
break;
case SensorSpeed.Ui:
manager.DeviceMotionUpdateInterval = UiInterval;
break;
}

manager.StartDeviceMotionUpdates(Platform.GetCurrentQueue(), DataUpdated);
}

static void DataUpdated(CMDeviceMotion data, NSError error)
{
if (data == null)
return;

var field = data.Attitude.Quaternion;
var rotationData = new OrientationSensorData(field.x, field.y, field.z, field.w);
OnChanged(rotationData);
}

internal static void PlatformStop() =>
Platform.MotionManager?.StopDeviceMotionUpdates();
}
}
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