// TODO: Swap TemplatingViewModel for a TemplatingViewModelFactory
// TODO: Swap SettingsViewModel for a SettingsViewModelFactory
public MainWindowViewModel(
IDataController dataController,
ITemplatingViewModel templatingViewModel,
ISettingsViewModel settingsViewModel,
ISettingsManager settingsManager,
IWindowService windowService,
IDispatcherHelper dispatcherHelper)
{
IntegrityCheck.IsNotNull(dataController);
IntegrityCheck.IsNotNull(templatingViewModel);
IntegrityCheck.IsNotNull(settingsViewModel);
IntegrityCheck.IsNotNull(settingsManager);
IntegrityCheck.IsNotNull(windowService);
IntegrityCheck.IsNotNull(dispatcherHelper);
// Save arguments
m_DataController = dataController;
m_TemplatingViewModel = templatingViewModel;
m_SettingsViewModel = settingsViewModel;
m_SettingsManager = settingsManager;
m_WindowService = windowService;
m_DispatcherHelper = dispatcherHelper;
// Initialise the state machine
m_StateLock = new object();
m_StateMgr = new StateManager <MainWindowState>(this, typeof(Uninitialised));
// Configure commands/event handlers
InitialiseCommands();
m_DataController.InitialisationComplete += DataController_InitialisationComplete;
m_DataController.GetCaptureComplete += DataController_GetCaptureComplete;
m_DataController.SaveTemplateComplete += DataController_SaveTemplateComplete;
m_TemplatingViewModel.UserActionRequired += TemplatingViewModel_UserActionRequired;
}
private double ParseValue(object value)
{
IntegrityCheck.IsNotNull(value);
double val;
bool isValSuccessful = double.TryParse((string)value, out val);
IntegrityCheck.IsTrue(isValSuccessful);
return(val);
}
public override void OnEnteringState()
{
base.OnEnteringState();
Outer.PromptText = m_PromptText;
m_Identifier = StartAsyncOperation();
IntegrityCheck.IsNotNull(m_Identifier);
}
// TODO: Note that there is a contract here, CaptureComplete SHALL follow, in a timely manner
Guid IDataController.BeginGetCapture(ScannerType scannerType)
{
Log.DebugFormat("BeginGetCapture(scannterType={0}) called",
scannerType);
IntegrityCheck.IsNotNull(scannerType);
return(StartLogic((Guid guid, CancellationToken token) =>
StartCaptureTask(scannerType, guid, token)));
}
public TemplatingViewModel(IDispatcherHelper dispatcherHelper)
{
IntegrityCheck.IsNotNull(dispatcherHelper);
m_DispatcherHelper = dispatcherHelper;
m_StateLock = new object();
Minutae = new TrulyObservableCollection <MinutiaRecord>();
m_StateMgr = new StateManager <TemplatingState>(this, typeof(Uninitialised));
}
public override void OnEnteringState()
{
base.OnEnteringState();
Outer.OnUserActionRequired(new UserActionRequiredEventArgs(SET_ANGLE_PROMPT));
// Get the minutia that was placed in the previous step
IntegrityCheck.AreNotEqual(0, Outer.Minutae.Count());
m_Record = Outer.Minutae.Last();
IntegrityCheck.IsNotNull(m_Record.Position);
}
public override void PositionUpdate(Point position)
{
IntegrityCheck.IsNotNull(position);
lock (Outer.m_SelectedMinutiaLock)
{
IntegrityCheck.IsNotNull(Outer.m_SelectedMinutia.HasValue);
// Set position
Outer.Minutae[Outer.m_SelectedMinutia.Value].Position = position;
}
}
// TODO: Note that there is a contract here, InitialisedComplete SHALL follow, in a timely manner
Guid IDataController.BeginInitialise(DataControllerConfig config)
{
Log.Debug("BeginInitialise(...) called.");
IntegrityCheck.IsNotNull(config, "config");
IntegrityCheck.IsNotNullOrEmpty(config.ApiKey, "config.ApiKey");
IntegrityCheck.IsNotNullOrEmpty(config.UrlRoot, "config.UrlRoot");
m_Config = config;
m_TokenSourceLookup.Clear();
return(StartLogic((Guid guid, CancellationToken token) =>
StartInitialiseTask(config, guid, token)));
}
/// <summary>
/// Initializes a new instance of the <see cref="GetCaptureCompleteEventArgs"/> class in
/// the case where the request was successful.
/// </summary>
/// <param name="capture">The capture.</param>
/// <param name="requestId">The request unique identifier.</param>
public GetCaptureCompleteEventArgs(CaptureInfo capture, Guid requestId, DataRequestResult result)
{
IntegrityCheck.IsNotNull(requestId);
IntegrityCheck.IsNotNull(result);
if (result == DataRequestResult.Success)
{
IntegrityCheck.IsNotNull(capture);
}
m_Capture = capture;
m_RequestId = requestId;
m_Result = result;
}
public StateManager(ViewModel viewModel, Type initialStateType)
{
IntegrityCheck.IsNotNull(viewModel);
m_ViewModel = viewModel;
// Instantiate all concrete states into a list for transitioning to.
m_States = new Dictionary <Type, T>();
foreach (Type type in Assembly.GetAssembly(typeof(T)).GetTypes()
.Where(myType =>
myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(T))))
{
m_States.Add(type, (T)Activator.CreateInstance(type, m_ViewModel));
}
// Transition to the initial state.
TransitionTo(initialStateType);
}
private T ToState(Type stateType)
{
IntegrityCheck.IsTrue(
typeof(T).IsAssignableFrom(stateType),
"Supplied type doesn't derive from {0}", typeof(T).Name);
IntegrityCheck.IsFalse(
stateType.IsAbstract,
"Cannot transition to abstract state {0}", stateType.Name);
T state;
bool isFound = m_States.TryGetValue(stateType, out state);
IntegrityCheck.IsTrue(isFound, "State {0} not found in m_States", stateType.Name);
IntegrityCheck.IsNotNull(
state,
"State {0} found in m_States, but value was null",
stateType.Name);
return(state);
}
void IDataController.AbortRequest(Guid guid)
{
Log.DebugFormat("AbortRequest(guid={0}) called.", guid);
IntegrityCheck.IsNotNull(guid);
// Attempt to lookup the token.
CancellationTokenSource tokenSource;
bool isSuccessful = m_TokenSourceLookup.TryGetValue(guid, out tokenSource);
if (isSuccessful)
{
// Request cancellation.
IntegrityCheck.IsNotNull(tokenSource);
tokenSource.Cancel();
m_TokenSourceLookup.Remove(guid);
}
else
{
// TODO: What to do if Guid doesn't correspond to a current request?
Log.WarnFormat("Cancellation of request (guid={0}) failed, token no longer exists.",
guid);
}
}
protected override void OnOperationComplete(GetCaptureCompleteEventArgs e)
{
// We have recieved a response from our request.
// Indicate we are no longer loading.
switch (e.Result)
{
case DataRequestResult.Success:
IntegrityCheck.IsNotNull(e.Capture);
Outer.PromptText = "Capture loaded";
Outer.m_TemplatingViewModel.BeginTemplating(e.Capture);
TransitionTo(typeof(Templating));
break;
case DataRequestResult.Failed:
// No capture was obtained.
Outer.PromptText = "No capture matching the criteria obtained.";
Log.DebugFormat(
"Capture request returned Failed response.",
Outer.FilteredScannerType);
TransitionTo(typeof(Idle));
break;
case DataRequestResult.TaskFailed:
// No capture was obtained.
Outer.PromptText = "App failed to carry out capture request.";
Log.ErrorFormat(
"Capture request returned TaskFailed response.",
Outer.FilteredScannerType);
TransitionTo(typeof(Idle));
break;
default:
throw IntegrityCheck.FailUnexpectedDefault(e.Result);
}
}
public State(ViewModel outer)
{
IntegrityCheck.IsNotNull(outer);
m_Outer = outer;
}
private static void CheckElementNotNull(XElement el, string tag)
{
IntegrityCheck.IsNotNull(el,
"Capture was missing '{0}' element.", tag);
}