/// <summary>
/// Initializes a new instance of the <see cref="MainPageViewModel"/> class.
/// </summary>
/// <param name="navigationService">Navigation service.</param>
/// <param name="cameraProvider">Camera provider.</param>
/// <param name="storageService">Phone storage service.</param>
/// <param name="settingsProvider">Settings provider.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="navigationService"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="cameraProvider"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="storageService"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="settingsProvider"/> is <see langword="null"/>.
/// </exception>
public MainPageViewModel(INavigationService navigationService, ICameraProvider cameraProvider, IStorageService storageService, ISettingsProvider settingsProvider)
{
if (navigationService == null)
{
throw new ArgumentNullException("navigationService");
}
if (cameraProvider == null)
{
throw new ArgumentNullException("cameraProvider");
}
if (storageService == null)
{
throw new ArgumentNullException("storageService");
}
if (settingsProvider == null)
{
throw new ArgumentNullException("settingsProvider");
}
this.navigationService = navigationService;
this.cameraProvider = cameraProvider;
this.storageService = storageService;
this.settingsProvider = settingsProvider;
this.items = new ObservableCollection <object>();
this.state = MainPageViewModelState.Unloaded;
this.applicationSettings = settingsProvider.GetApplicationSettings();
this.cameraSettings = settingsProvider.GetCameraSettings(this.applicationSettings.CameraType);
}
public DeviceRootDeviceManager(ICameraSettings cameraSettings,
IHSApplication HS,
CancellationToken cancellationToken)
{
this.HS = HS;
this.cancellationToken = cancellationToken;
CameraSettings = cameraSettings;
GetCurrentDevices();
CreateParentDevice();
}
public CameraManager(IHSApplication HS,
ICameraSettings cameraSettings,
CancellationToken shutdownDownToken)
{
this.HS = HS;
CameraSettings = cameraSettings;
cancelTokenSource = new CombinedCancelToken(shutdownDownToken);
rootDeviceData = new DeviceRootDeviceManager(cameraSettings, this.HS, cancelTokenSource.Token);
camera = cameraSettings.CreateCamera(shutdownDownToken);
TaskHelper.StartAsyncWithErrorChecking(Invariant($"{cameraSettings.Name} Process Updates"),
ProcessUpdates, cancelTokenSource.Token);
}
/// <summary>
/// Loads camera device, if needed.
/// </summary>
/// <param name="areaSize">The size of the area available for the video preview.</param>
/// <returns>Awaitable task.</returns>
public async Task EnsureCameraLoadedAsync(Size areaSize)
{
if (this.camera != null)
{
// Make sure the the correct camera is loaded.
if (this.camera.CameraType == this.CameraType && this.State != MainPageViewModelState.Unloaded)
{
Tracing.Trace("MainPageViewModel: {0} camera is already loaded.", this.CameraType);
return;
}
await this.UnloadCameraAsync();
}
this.State = MainPageViewModelState.Loading;
this.camera = await this.cameraProvider.GetCameraAsync(this.CameraType);
this.cameraSettings = this.settingsProvider.GetCameraSettings(this.CameraType);
this.camera.Orientation = this.orientation;
this.previewAreaSize = areaSize;
await this.camera.LoadCameraAsync();
await this.StartPreviewAsync(this.previewAreaSize);
// Allow camera to automatically focus without user requests, if supported.
await this.TryToEnableContinuousAutoFocusAsync();
this.camera.FocusChanged += this.CameraOnFocusChanged;
this.camera.PhotoCaptured += this.CameraOnPhotoCaptured;
this.camera.CaptureStopped += this.CameraOnCaptureStopped;
this.PreviewSize = this.camera.PreviewSize;
this.PreviewBrush = this.camera.PreviewBrush;
this.FlashSupported = this.camera.FlashSupported;
await this.UpdatePhotoCaptureAsync();
this.State = MainPageViewModelState.Loaded;
EventHandler handler = this.CameraLoaded;
if (handler != null)
{
handler.Invoke(this, EventArgs.Empty);
}
}
public override void SetOnDeviceCreateData(IHSApplication HS, ICameraSettings cameraSettings, int refID)
{
HS.set_DeviceInvalidValue(refID, false);
HS.SetDeviceString(refID, "Root", false);
}
public override void OnPlugInLoad(IHSApplication HS, ICameraSettings cameraSettings)
{
// Method intentionally left empty.
}
/// <summary>
/// Loads camera device, if needed.
/// </summary>
/// <param name="areaSize">The size of the area available for the video preview.</param>
/// <returns>Awaitable task.</returns>
public async Task EnsureCameraLoadedAsync(Size areaSize)
{
if (this.camera != null)
{
// Make sure the the correct camera is loaded.
if (this.camera.CameraType == this.CameraType && this.State != MainPageViewModelState.Unloaded)
{
Tracing.Trace("MainPageViewModel: {0} camera is already loaded.", this.CameraType);
return;
}
await this.UnloadCameraAsync();
}
this.State = MainPageViewModelState.Loading;
this.camera = await this.cameraProvider.GetCameraAsync(this.CameraType);
this.cameraSettings = this.settingsProvider.GetCameraSettings(this.CameraType);
this.camera.Orientation = this.orientation;
this.previewAreaSize = areaSize;
await this.camera.LoadCameraAsync();
await this.StartPreviewAsync(this.previewAreaSize);
// Allow camera to automatically focus without user requests, if supported.
await this.TryToEnableContinuousAutoFocusAsync();
this.camera.FocusChanged += this.CameraOnFocusChanged;
this.camera.PhotoCaptured += this.CameraOnPhotoCaptured;
this.camera.CaptureStopped += this.CameraOnCaptureStopped;
this.PreviewSize = this.camera.PreviewSize;
this.PreviewBrush = this.camera.PreviewBrush;
this.FlashSupported = this.camera.FlashSupported;
await this.UpdatePhotoCaptureAsync();
this.State = MainPageViewModelState.Loaded;
EventHandler handler = this.CameraLoaded;
if (handler != null)
{
handler.Invoke(this, EventArgs.Empty);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MainPageViewModel"/> class.
/// </summary>
/// <param name="navigationService">Navigation service.</param>
/// <param name="cameraProvider">Camera provider.</param>
/// <param name="storageService">Phone storage service.</param>
/// <param name="settingsProvider">Settings provider.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="navigationService"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="cameraProvider"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="storageService"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="settingsProvider"/> is <see langword="null"/>.
/// </exception>
public MainPageViewModel(INavigationService navigationService, ICameraProvider cameraProvider, IStorageService storageService, ISettingsProvider settingsProvider)
{
if (navigationService == null)
{
throw new ArgumentNullException("navigationService");
}
if (cameraProvider == null)
{
throw new ArgumentNullException("cameraProvider");
}
if (storageService == null)
{
throw new ArgumentNullException("storageService");
}
if (settingsProvider == null)
{
throw new ArgumentNullException("settingsProvider");
}
this.navigationService = navigationService;
this.cameraProvider = cameraProvider;
this.storageService = storageService;
this.settingsProvider = settingsProvider;
this.items = new ObservableCollection<object>();
this.state = MainPageViewModelState.Unloaded;
this.applicationSettings = settingsProvider.GetApplicationSettings();
this.cameraSettings = settingsProvider.GetCameraSettings(this.applicationSettings.CameraType);
}
public virtual void SetOnDeviceCreateData(IHSApplication HS, ICameraSettings cameraSettings, int refId)
{
HS.SetDeviceValueByRef(refId, 0D, false);
HS.set_DeviceInvalidValue(refId, true);
}
public virtual void OnPlugInLoad(IHSApplication HS, ICameraSettings cameraSettings)
{
}
