public CreateProjectProgressViewModel(FlutnetAppSettings appSettings, FlutnetProjectSettings projectSettings, NewProjectViewModel screen = null) : base("newprj_progress", screen)
{
_appSettings = appSettings;
_projectSettings = projectSettings;
Title = "New Project";
Description = "The project will take some time to generate.\nWait until the procedure finish.\n";
IsDescriptionVisible = false;
NextText = "Finish";
BackVisible = false;
IsFinishPage = true;
OutputLines = new ObservableCollection <string>();
// Observe any changes in the observable collection.
// Note that the property has no public setters, so we
// assume the collection is mutated by using the Add(),
// Delete(), Clear() and other similar methods.
OutputLines
// Convert the collection to a stream of chunks,
// so we have IObservable<IChangeSet<TKey, TValue>>
// type also known as the DynamicData monad.
.ToObservableChangeSet()
// Each time the collection changes, we get
// all updated items at once.
.ToCollection()
// Aggregate all the elements in the collection
// into a multi-line string.
.Select(lines => string.Join(Environment.NewLine, lines))
// Then, we convert the multi-line string to the
// property a multi-line TextBox can bind.
.ToProperty(this, x => x.Output, out _output, scheduler: RxApp.MainThreadScheduler);
// Create the command that calls Flutnet CLI
CreateProject = ReactiveCommand.CreateFromTask(async ct =>
{
NewProjectInArg arguments = BuildCommandLineArg();
CommandLineCallResult callResult = await CommandLineTools.Call <NewProjectOutArg>(arguments, ct, line =>
{
OutputLines.Add(line);
});
// This is not the proper way to change property values and raise property change notifications:
// we should return a public object and subscribe to the command observable
// so that we can use ReactiveUI framework methods such as ToProperty, BindTo etc.
if (callResult.Canceled)
{
IsCanceled = true;
}
else if (callResult.Failed)
{
IsFailed = true;
}
else
{
OutArg result = callResult.CommandResult;
if (!result.Success)
{
IsFailed = true;
}
else
{
IsCompletedSuccessfully = true;
}
}
});
CreateProject.IsExecuting.ToProperty(this, x => x.IsInProgress, out _isInProgress);
CreateProject.IsExecuting.BindTo(this, x => x.IsBusy);
BrowseProject = ReactiveCommand.Create(
execute: () => Launcher.OpenFolder(Path.Combine(projectSettings.Location, projectSettings.SolutionName)),
canExecute: this.WhenAnyValue(t => t.IsCompletedSuccessfully));
// Execute the command when the View is activated
Activator = new ViewModelActivator();
this.WhenActivated(disposables =>
{
CreateProject.Execute(Unit.Default).Subscribe().DisposeWith(disposables);
});
this.WhenAnyValue(t => t.IsInProgress, t => !t).BindTo(this, t => t.NextEnabled);
}
protected override void SetOutputs(AsyncCodeActivityContext ctx, object output)
{
OutArg.Set(ctx, output);
SetOutputsHandler(ctx, output);
}