/// <summary>
/// Called when the object is validated.
/// </summary>
protected override void OnValidated()
{
bool updatedValidationSummaries = false;
foreach (var validationSummaryInfo in _validationSummaries)
{
var isSummaryUpdateRequired = false;
var lastUpdated = _validationSummariesUpdateStamps.ContainsKey(validationSummaryInfo.Key) ? _validationSummariesUpdateStamps[validationSummaryInfo.Key] : 0L;
isSummaryUpdateRequired = this.IsValidationSummaryOutdated(lastUpdated, validationSummaryInfo.Value.IncludeChildViewModels);
if (!isSummaryUpdateRequired)
{
continue;
}
IValidationSummary validationSummary;
if (validationSummaryInfo.Value.UseTagToFilter)
{
validationSummary = this.GetValidationSummary(validationSummaryInfo.Value.IncludeChildViewModels, validationSummaryInfo.Value.Tag);
}
else
{
validationSummary = this.GetValidationSummary(validationSummaryInfo.Value.IncludeChildViewModels);
}
PropertyHelper.SetPropertyValue(this, validationSummaryInfo.Key, validationSummary);
_validationSummariesUpdateStamps[validationSummaryInfo.Key] = validationSummary.LastModifiedTicks;
updatedValidationSummaries = true;
}
if (updatedValidationSummaries)
{
ViewModelCommandManager.InvalidateCommands();
}
base.OnValidated();
}
/// <summary>
/// Registers the commands in a specific <see cref="IViewModel" /> instance. By subscribing
/// to all commands, the <see cref="IViewModel.CommandExecutedAsync" /> can be intercepted.
/// <para />
/// This method will automatically subscribe to the <see cref="IViewModel.ClosedAsync"/> event and unsubscribe all commands
/// at that time.
/// </summary>
/// <param name="viewModel">The view model.</param>
/// <exception cref="ArgumentNullException">The <paramref name="viewModel"/> is <c>null</c>.</exception>
public static IViewModelCommandManager Create(IViewModel viewModel)
{
Argument.IsNotNull("viewModel", viewModel);
lock (_instances)
{
// Event the check for closed is done inside the lock. It might be that the lock has awaited the removal because the vm was being closed
// in the meantime
if (viewModel.IsClosed)
{
Log.Warning("View model '{0}' with unique identifier '{1}' is already closed, cannot manage commands of a closed view model", viewModel.GetType().FullName, viewModel.UniqueIdentifier);
return(null);
}
if (!_instances.TryGetValue(viewModel.UniqueIdentifier, out var commandManager))
{
commandManager = new ViewModelCommandManager(viewModel);
_instances[viewModel.UniqueIdentifier] = commandManager;
}
return(commandManager);
}
}
