public void Visit(IAsyncMvvmCommand command)
{
var errorTitleKey = string.Concat(command.Name, TitleResourceKeySuffix);
var errorContentKey = string.Concat(command.Name, ContentResourceKeySuffix);
var errorTitle = _resources.Get(errorTitleKey);
var errorContent = _resources.Get(errorContentKey);
var isDefault = command.SetDefaultError(async(ct, ex) =>
{
await _messageDialog.Show(ct, errorTitle, errorContent);
});
if (isDefault && (string.IsNullOrEmpty(errorTitle) || string.IsNullOrEmpty(errorContent)))
{
var sb = new StringBuilder();
sb.AppendLine(string.Concat("Resources missing for command ", command.Name));
sb.AppendLine("Missing resources keys :");
if (string.IsNullOrEmpty(errorTitle))
{
sb.AppendLine(errorTitleKey);
}
if (string.IsNullOrEmpty(errorContent))
{
sb.AppendLine(errorContentKey);
}
throw new InvalidOperationException(sb.ToString());
}
}
/// <summary>
/// Observe the settings panel activation and adds command.
/// </summary>
/// <param name="observer"></param>
/// <returns></returns>
public IDisposable Subscribe(IObserver <Unit> observer)
{
return(Observable.Defer(() =>
{
var settingsPane = SettingsPane.GetForCurrentView();
return Observable.FromEventPattern <TypedEventHandler <SettingsPane, SettingsPaneCommandsRequestedEventArgs>, SettingsPaneCommandsRequestedEventArgs>(
h => settingsPane.CommandsRequested += h,
h => settingsPane.CommandsRequested -= h,
_dispatcher);
})
.Do(args =>
{
var settingsArgs = args.EventArgs;
foreach (var commandDefinition in _commandDefinitions.Where(d => d.Command(_viewModel.Value).CanExecute(null)))
{
CommandDefinition definition = commandDefinition;
settingsArgs.Request.ApplicationCommands.Add(new SettingsCommand(
commandDefinition.Id,
_resources.Get(commandDefinition.TitleKey),
command => definition.Command(_viewModel.Value).Execute(null)));
}
})
.SelectUnit()
.Subscribe(observer));
}
