private ReactiveTableViewSource <TeamItemViewModel> CreateSource(IReadOnlyReactiveList <TeamItemViewModel> items)
{
var source = new ReactiveTableViewSource <TeamItemViewModel>(TableView, items, TeamCellView.Key, (float)UITableView.AutomaticDimension);
source.ElementSelected.OfType <TeamItemViewModel>().Subscribe(x => x.GoToCommand.ExecuteIfCan());
return(source);
}
public LanguagesViewModel()
{
Title = "Languages";
var languages = new ReactiveList<Language>();
Languages = languages.CreateDerivedCollection(
x => new LanguageItemViewModel(x.Name, x.Slug),
filter: x => x.Name.StartsWith(SearchKeyword ?? string.Empty, StringComparison.OrdinalIgnoreCase),
signalReset: this.WhenAnyValue(x => x.SearchKeyword));
Languages
.Changed.Select(_ => Unit.Default)
.Merge(this.WhenAnyValue(x => x.SelectedLanguage).Select(_ => Unit.Default))
.Select(_ => SelectedLanguage)
.Where(x => x != null)
.Subscribe(x =>
{
foreach (var l in Languages)
l.Selected = l.Slug == x.Slug;
});
this.WhenAnyValue(x => x.SelectedLanguage)
.IsNotNull()
.Subscribe(_ => Dismiss());
LoadCommand = ReactiveCommand.CreateAsyncTask(async t =>
{
var languageRepository = new LanguageRepository();
var langs = await languageRepository.GetLanguages();
langs.Insert(0, LanguageRepository.DefaultLanguage);
languages.Reset(langs);
});
}
public LanguagesViewModel(IJsonSerializationService jsonSerializationService, INetworkActivityService networkActivity)
{
var languages = new ReactiveList<LanguageModel>();
Languages = languages.CreateDerivedCollection(
x => new LanguageItemViewModel(x.Name, x.Slug),
x => x.Name.StartsWith(SearchKeyword ?? string.Empty, StringComparison.OrdinalIgnoreCase),
signalReset: this.WhenAnyValue(x => x.SearchKeyword));
Languages
.Changed.Select(_ => Unit.Default)
.Merge(this.WhenAnyValue(x => x.SelectedLanguage).Select(_ => Unit.Default))
.Select(_ => SelectedLanguage)
.Where(x => x != null)
.Subscribe(x =>
{
foreach (var l in Languages)
l.Selected = l.Slug == x.Slug;
});
LoadCommand = ReactiveCommand.CreateAsyncTask(async t =>
{
var trendingData = await BlobCache.LocalMachine.DownloadUrl(LanguagesUrl, absoluteExpiration: DateTimeOffset.Now.AddDays(1));
var langs = jsonSerializationService.Deserialize<List<LanguageModel>>(System.Text.Encoding.UTF8.GetString(trendingData));
langs.Insert(0, DefaultLanguage);
languages.Reset(langs);
});
LoadCommand.TriggerNetworkActivity(networkActivity);
LoadCommand.ExecuteIfCan();
}
public LanguagesViewModel(IJsonSerializationService jsonSerializationService, INetworkActivityService networkActivity)
{
var languages = new ReactiveList <LanguageModel>();
Languages = languages.CreateDerivedCollection(
x => new LanguageItemViewModel(x.Name, x.Slug),
x => x.Name.StartsWith(SearchKeyword ?? string.Empty, StringComparison.OrdinalIgnoreCase),
signalReset: this.WhenAnyValue(x => x.SearchKeyword));
Languages
.Changed.Select(_ => Unit.Default)
.Merge(this.WhenAnyValue(x => x.SelectedLanguage).Select(_ => Unit.Default))
.Select(_ => SelectedLanguage)
.Where(x => x != null)
.Subscribe(x =>
{
foreach (var l in Languages)
{
l.Selected = l.Slug == x.Slug;
}
});
LoadCommand = ReactiveCommand.CreateAsyncTask(async t =>
{
var trendingData = await BlobCache.LocalMachine.DownloadUrl(LanguagesUrl, absoluteExpiration: DateTimeOffset.Now.AddDays(1));
var langs = jsonSerializationService.Deserialize <List <LanguageModel> >(System.Text.Encoding.UTF8.GetString(trendingData));
langs.Insert(0, DefaultLanguage);
languages.Reset(langs);
});
}
public ValueListNodeInputViewModel()
{
MaxConnections = Int32.MaxValue;
ConnectionValidator = pending => new ConnectionValidationResult(pending.Output is ValueNodeOutputViewModel <T>, null);
Values = Connections.ObserveLatestToList(c => ((ValueNodeOutputViewModel <T>)c.Output).WhenAnyObservable(vm => vm.Value), c => true).List;
}
public static IObservable <IReadOnlyReactiveList <T> > ChangedObservable <T>(this IReadOnlyReactiveList <T> @this)
{
return(@this.Changed
.Select(_ => Unit.Default)
.StartWith(Unit.Default)
.Select(_ => @this));
}
public LanguagesViewModel(LanguageRepository languageRepository)
{
Title = "Languages";
var languages = new ReactiveList <Language>();
Languages = languages.CreateDerivedCollection(
x => new LanguageItemViewModel(x.Name, x.Slug),
filter: x => x.Name.StartsWith(SearchKeyword ?? string.Empty, StringComparison.OrdinalIgnoreCase),
signalReset: this.WhenAnyValue(x => x.SearchKeyword));
Languages
.Changed.Select(_ => Unit.Default)
.Merge(this.WhenAnyValue(x => x.SelectedLanguage).Select(_ => Unit.Default))
.Select(_ => SelectedLanguage)
.Where(x => x != null)
.Subscribe(x =>
{
foreach (var l in Languages)
{
l.Selected = l.Slug == x.Slug;
}
});
LoadCommand = ReactiveCommand.CreateAsyncTask(async t =>
{
var langs = await languageRepository.GetLanguages();
langs.Insert(0, LanguageRepository.DefaultLanguage);
languages.Reset(langs);
});
}
public NotificationGroupViewModel(string name, IReadOnlyReactiveList <NotificationModel> notifications, Action <NotificationGroupViewModel> readAll)
: this(name, notifications)
{
if (readAll != null)
{
ReadAllCommand = ReactiveCommand.Create().WithSubscription(_ => readAll(this));
}
}
public ItemsSection(string title, IReadOnlyReactiveList <ItemViewModel> items)
{
this.Collection = items;
this.CellKeySelector = _ => cellKey;
this.Header = new TableSectionHeader(title);
this.SizeHint = 30;
this.InitializeCellAction = x => x.Accessory = UITableViewCellAccessory.None;
}
public MovieListAdapter(IReadOnlyReactiveList <IMovieModel> list, IScheduleProvider scheduleProvider)
{
_list = list;
_inner = _list.Changed
.Throttle(TimeSpan.FromMilliseconds(100))
.ObserveOn(scheduleProvider.UiScheduler)
.Subscribe(_ => NotifyDataSetChanged());
HasStableIds = true;
}
public SectionViewModel(string title, IReadOnlyReactiveList <ItemViewModel> items)
{
this.title = title;
this.items = items;
this.isVisible = this.items
.CountChanged
.Select(x => x > 0)
.ToProperty(this, x => x.IsVisible, initialValue: false, scheduler: RxApp.MainThreadScheduler);
}
public NotificationGroupViewModel(string name, IReadOnlyReactiveList<NotificationItemViewModel> notifications)
{
Notifications = notifications;
Name = name;
_visible = notifications.CountChanged
.StartWith(notifications.Count)
.Select(x => x > 0)
.ToProperty(this, x => x.IsVisible);
}
public ReactivePagerAdapter(IReadOnlyReactiveList <TViewModel> backingList,
Func <TViewModel, ViewGroup, View> viewCreator,
Action <TViewModel, View> viewInitializer = null)
{
this.list = backingList;
this.viewCreator = viewCreator;
this.viewInitializer = viewInitializer;
inner = this.list.Changed.Subscribe(_ => NotifyDataSetChanged());
}
public NotificationGroupViewModel(string name, IReadOnlyReactiveList <NotificationItemViewModel> notifications)
{
Notifications = notifications;
Name = name;
_visible = notifications.CountChanged
.StartWith(notifications.Count)
.Select(x => x > 0)
.ToProperty(this, x => x.IsVisible);
}
public CommitedFilesTableViewSource(UITableView tableView, IReadOnlyReactiveList <CommitedFileItemViewModel> collection)
: base(tableView, 44f)
{
tableView.RegisterClassForCellReuse(typeof(CommitedFileTableViewCell), CommitedFileTableViewCell.Key);
collection.Changed
.Select(_ => Unit.Default)
.StartWith(Unit.Default)
.Select(_ => collection)
.Subscribe(SetData);
}
public NotificationTableViewSource(UITableView tableView, IReadOnlyReactiveList <NotificationGroupViewModel> collections, Func <bool> canEdit)
: base(tableView, UITableView.AutomaticDimension, 64f)
{
_canEdit = canEdit;
tableView.RegisterNibForCellReuse(NotificationTableViewCell.Nib, NotificationTableViewCell.Key);
Data = collections.CreateDerivedCollection(x =>
new TableSectionInformation <NotificationItemViewModel, NotificationTableViewCell>(x.Notifications, NotificationTableViewCell.Key, (float)UITableView.AutomaticDimension)
{
Header = new TableSectionHeader(x.Name)
},
filter: x => x.IsVisible,
signalReset: collections.Changed);
}
public AccountsViewModel(
IApplicationService applicationService = null,
IAccountsService accountsService = null)
{
accountsService = accountsService ?? Locator.Current.GetService <IAccountsService>();
applicationService = applicationService ?? Locator.Current.GetService <IApplicationService>();
Title = "Accounts";
var activeAccount = applicationService.Account;
var currentUsername = activeAccount?.Username;
var accounts = new ReactiveList <Account>();
Items = accounts.CreateDerivedCollection(x =>
{
var vm = new AccountItemViewModel(x);
if (activeAccount?.Id == x.Id)
{
vm.GoToCommand.BindCommand(DismissCommand);
vm.IsSelected = true;
}
else
{
vm.GoToCommand
.Do(_ => applicationService.SetDefaultAccount(x))
.Subscribe(_ => MessageBus.Current.SendMessage(new LogoutMessage()));
}
vm.DeleteCommand.Subscribe(_ =>
{
accountsService.Remove(x);
accounts.Remove(x);
});
return(vm);
});
DismissCommand = ReactiveCommand.Create(
() => { },
accounts.Changed.Select(x => accounts.Any(y => y.Username == currentUsername)));
LoadCommand = ReactiveCommand.CreateFromTask(async _ =>
{
var allAccounts = await accountsService.GetAccounts();
return(allAccounts.ToList());
});
LoadCommand.Subscribe(x => accounts.Reset(x));
}
protected UsersViewModel()
{
var users = new ReactiveList <UserItemViewModel>(resetChangeThreshold: 1);
Items = users.CreateDerivedCollection(
x => x,
x => x.Username.ContainsKeyword(SearchText) || x.DisplayName.ContainsKeyword(SearchText),
signalReset: this.WhenAnyValue(x => x.SearchText));
LoadCommand = ReactiveCommand.CreateFromTask(async _ =>
{
users.Clear();
await Load(users);
});
_isEmpty = LoadCommand
.IsExecuting
.Skip(1)
.Select(x => !x && users.Count == 0)
.ToProperty(this, x => x.IsEmpty);
}
public IssueAssigneeViewModel(
Func <Task <IReadOnlyList <User> > > loadAssignees,
Func <Task <Issue> > loadIssue,
Func <IssueUpdate, Task <Issue> > updateIssue
)
{
var derivedFunc = new Func <User, IssueAssigneeItemViewModel>(x =>
{
var vm = new IssueAssigneeItemViewModel(x);
if (_selectedUser != null)
{
vm.IsSelected = x.Id == _selectedUser.Id;
}
vm.GoToCommand.Subscribe(_ =>
{
var assigneeName = vm.IsSelected ? vm.Name : null;
updateIssue(new IssueUpdate {
Assignee = assigneeName
}).ToBackground();
});
return(vm);
});
var assignees = new ReactiveList <User>();
Assignees = assignees.CreateDerivedCollection(
derivedFunc,
filter: x => x.Name.ContainsKeyword(SearchKeyword),
signalReset: this.WhenAnyValue(x => x.SearchKeyword));
LoadCommand = ReactiveCommand.CreateAsyncTask(async _ =>
{
_selectedUser = (await loadIssue()).Assignee;
assignees.Reset(await loadAssignees());
});
}
public PartyViewsDragPanel(IReadOnlyReactiveList <CommunicationDiagramPartyView> partyViews)
{
PartyViews = partyViews;
// Automatically enter label editing mode when adding a party
PartyViews.OnAdd.Subscribe(elem =>
{
if (IsVisible && (IsFocused || HasChildInFocus()))
{
elem.Element.LabelView.IsInEditMode = true;
elem.Element.LabelView.Focus();
}
});
// Two-way binding between the viewmodel and view position.
partyViews.ObserveEach(partyView => partyView.ViewModel.PositionChanged)
.Subscribe(e => e.Element.Position = e.Value);
partyViews.ObserveEach(partyView => partyView.PositionChanged)
.Subscribe(e => e.Element.ViewModel.Position = e.Value);
// Automatically add and remove party views to Children.
PartyViews.OnAdd.Subscribe(e => Children.Add(e.Element));
PartyViews.OnDelete.Subscribe(e => Children.Remove(e.Element));
}
this IReadOnlyReactiveList <TInput> sourceList,
Func <TInput, TResult> selectorFunc,
Func <TInput, bool> filterFunc = null
)
{
return(CreateDerivedListBinding(Observable.Return(sourceList), selectorFunc, filterFunc));
protected ReactiveRecyclerViewAdapter(IReadOnlyReactiveList <TViewModel> backingList)
{
this.list = backingList;
_inner = this.list.Changed.Subscribe(_ => NotifyDataSetChanged());
}
public IssueGroupViewModel(string name, IEnumerable<IssueItemViewModel> issues)
{
Issues = new ReactiveList<IssueItemViewModel>(issues);
Name = name;
}
public CardAdapter(IReadOnlyReactiveList <CardViewModel> collection) : base(collection)
{
ItemSelected = new Subject <int>();
}
public Parent(int id)
{
Id = id;
Children = new ReactiveList <Person>();
ChildrenReadonly = Children;
}
public Parent(int id, IEnumerable <Person> children)
{
Id = id;
Children = new ReactiveList <Person>(children);
ChildrenReadonly = Children;
}
public NotificationGroupViewModel(string name, IReadOnlyReactiveList <NotificationModel> notifications)
{
Notifications = notifications;
Name = name;
}
public NotificationGroupViewModel(string name, IReadOnlyReactiveList<NotificationModel> notifications, Action<NotificationGroupViewModel> readAll)
: this(name, notifications)
{
if (readAll != null)
ReadAllCommand = ReactiveCommand.Create().WithSubscription(_ => readAll(this));
}
public Parent()
{
Children = new ReactiveList <Person>();
ChildrenReadonly = Children;
}
/// <summary>
/// Clones the ReactiveList from all changes
/// </summary>
/// <typeparam name="TObject">The type of the object.</typeparam>
/// <typeparam name="TKey">The type of the key.</typeparam>
/// <param name="source">The source.</param>
/// <param name="keySelector">The key selector.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">source
/// or
/// keySelector</exception>
public static IObservable <IChangeSet <TObject, TKey> > ToObservableChangeSet <TObject, TKey>(this IReadOnlyReactiveList <TObject> source, Func <TObject, TKey> keySelector)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (keySelector == null)
{
throw new ArgumentNullException(nameof(keySelector));
}
return(source.ToObservableChangeSet <IReadOnlyReactiveList <TObject>, TObject>().AddKey(keySelector));
}
/// <summary>
/// Converts the Reactive List into an observable change set
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source">The source.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">source</exception>
public static IObservable <IChangeSet <T> > ToObservableChangeSet <T>(this IReadOnlyReactiveList <T> source)
{
return(source.ToObservableChangeSet <IReadOnlyReactiveList <T>, T>());
}
public ExerciseProgramViewModel(
ILoggerService loggerService,
IScheduler scheduler,
IScreen hostScreen,
ExerciseProgram model)
{
Ensure.ArgumentNotNull(loggerService, nameof(loggerService));
Ensure.ArgumentNotNull(scheduler, nameof(scheduler));
Ensure.ArgumentNotNull(hostScreen, nameof(hostScreen));
Ensure.ArgumentNotNull(model, nameof(model));
this.logger = loggerService.GetLogger(this.GetType());
this.scheduler = scheduler;
this.model = model;
this.hostScreen = hostScreen;
this.disposables = new CompositeDisposable();
this.exercises = this.model.Exercises.CreateDerivedCollection(x => new ExerciseViewModel(scheduler, x, this.WhenAnyValue(y => y.ExecutionContext)));
this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.ExecutionContext.IsCancelled,
(ec, isCancelled) => ec != null && !isCancelled)
.ObserveOn(scheduler)
.Subscribe(x => this.IsStarted = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(x => x == null ? Observable.Return(false) : x.WhenAnyValue(y => y.IsPaused))
.Switch()
.ObserveOn(scheduler)
.Subscribe(x => this.IsPaused = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(x => x == null ? Observable.Return(TimeSpan.Zero) : x.WhenAnyValue(y => y.Progress))
.Switch()
.ObserveOn(scheduler)
.Subscribe(x => this.ProgressTimeSpan = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ProgressTimeSpan)
.Select(x => x.TotalMilliseconds / this.model.Duration.TotalMilliseconds)
.Subscribe(x => this.Progress = x)
.AddTo(this.disposables);
this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.ExecutionContext.CurrentExercise,
(ec, currentExercise) => ec == null ? null : currentExercise)
.Select(x => this.Exercises.SingleOrDefault(y => y.Model == x))
.ObserveOn(scheduler)
.Subscribe(x => this.CurrentExercise = x)
.AddTo(this.disposables);
var canStart = this
.WhenAnyValue(x => x.IsStarted)
.Select(x => !x);
this.startCommand = ReactiveCommand
.CreateFromObservable <TimeSpan?, Unit>(this.OnStart, canStart, scheduler)
.AddTo(this.disposables);
var canPause = this
.WhenAnyValue(x => x.IsStarted)
.CombineLatest(this.WhenAnyValue(x => x.ExecutionContext.IsPaused), (isStarted, isPaused) => isStarted && !isPaused)
.ObserveOn(scheduler);
this.pauseCommand = ReactiveCommand
.CreateFromObservable(this.OnPause, canPause, scheduler)
.AddTo(this.disposables);
var canResume = this
.WhenAnyValue(x => x.IsStarted)
.CombineLatest(this.WhenAnyValue(x => x.ExecutionContext.IsPaused), (isStarted, isPaused) => isStarted && isPaused)
.ObserveOn(scheduler);
this.resumeCommand = ReactiveCommand
.CreateFromObservable(this.OnResume, canResume, scheduler)
.AddTo(this.disposables);
var canSkipBackwards = this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.ProgressTimeSpan,
(ec, progress) => new { ExecutionContext = ec, Progress = progress })
.Select(x => x.ExecutionContext != null && x.Progress >= skipBackwardsThreshold)
.ObserveOn(scheduler);
this.skipBackwardsCommand = ReactiveCommand
.CreateFromObservable(this.OnSkipBackwards, canSkipBackwards, scheduler)
.AddTo(this.disposables);
var canSkipForwards = this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.CurrentExercise,
(ec, currentExercise) => new { ExecutionContext = ec, CurrentExercise = currentExercise })
.Select(x => x.ExecutionContext != null && x.CurrentExercise != null && x.CurrentExercise != this.exercises.LastOrDefault())
.ObserveOn(scheduler);
this.skipForwardsCommand = ReactiveCommand
.CreateFromObservable(this.OnSkipForwards, canSkipForwards, scheduler)
.AddTo(this.disposables);
this.startCommand
.CanExecute
.Subscribe(x => this.IsStartVisible = x)
.AddTo(this.disposables);
this.pauseCommand
.CanExecute
.Subscribe(x => this.IsPauseVisible = x)
.AddTo(this.disposables);
this.resumeCommand
.CanExecute
.Subscribe(x => this.IsResumeVisible = x)
.AddTo(this.disposables);
this.startCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("start", ex))
.AddTo(this.disposables);
this.pauseCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("pause", ex))
.AddTo(this.disposables);
this.resumeCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("resume", ex))
.AddTo(this.disposables);
this.skipBackwardsCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("skip backwards", ex))
.AddTo(this.disposables);
this.skipForwardsCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("skip forwards", ex))
.AddTo(this.disposables);
// we don't use a reactive command here because switching in different commands causes it to get confused and
// command binding leaves the target button disabled. We could also have not used command binding to get around
// this problem
this.playbackCommand = new PlaybackCommandImpl(this);
// cancel the exercise program if the user navigates away
this
.hostScreen
.Router
.NavigationStack
.ItemsRemoved
.OfType <ExerciseProgramViewModel>()
.SelectMany(x => x.Stop())
.Subscribe()
.AddTo(this.disposables);
}
public GroupedCollection(string name, IReadOnlyReactiveList <TViewModel> items)
{
Name = name;
Items = items;
}
public RxSpyObservablesGridViewModel(IReadOnlyReactiveList <RxSpyObservableModel> model)
{
Observables = model.CreateDerivedCollection(x => new RxSpyObservableGridItemViewModel(x));
}
public RxSpyObservablesGridViewModel(IReadOnlyReactiveList<RxSpyObservableModel> model)
{
Observables = model.CreateDerivedCollection(x => new RxSpyObservableGridItemViewModel(x));
}
public NotificationGroupViewModel(string name, IReadOnlyReactiveList<NotificationModel> notifications)
{
Notifications = notifications;
Name = name;
}
public IssueGroupViewModel(string name, IEnumerable <IssueItemViewModel> issues)
{
Issues = new ReactiveList <IssueItemViewModel>(issues);
Name = name;
}
public ExerciseProgramViewModel(
ILoggerService loggerService,
IScheduler scheduler,
IScreen hostScreen,
ExerciseProgram model)
{
Ensure.ArgumentNotNull(loggerService, nameof(loggerService));
Ensure.ArgumentNotNull(scheduler, nameof(scheduler));
Ensure.ArgumentNotNull(hostScreen, nameof(hostScreen));
Ensure.ArgumentNotNull(model, nameof(model));
this.logger = loggerService.GetLogger(this.GetType());
this.scheduler = scheduler;
this.model = model;
this.hostScreen = hostScreen;
this.disposables = new CompositeDisposable();
this.exercises = this.model.Exercises.CreateDerivedCollection(x => new ExerciseViewModel(scheduler, x, this.WhenAnyValue(y => y.ExecutionContext)));
this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.ExecutionContext.IsCancelled,
(ec, isCancelled) => ec != null && !isCancelled)
.ObserveOn(scheduler)
.Subscribe(x => this.IsStarted = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(x => x == null ? Observable.Return(false) : x.WhenAnyValue(y => y.IsPaused))
.Switch()
.ObserveOn(scheduler)
.Subscribe(x => this.IsPaused = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ExecutionContext)
.Select(x => x == null ? Observable.Return(TimeSpan.Zero) : x.WhenAnyValue(y => y.Progress))
.Switch()
.ObserveOn(scheduler)
.Subscribe(x => this.ProgressTimeSpan = x)
.AddTo(this.disposables);
this
.WhenAnyValue(x => x.ProgressTimeSpan)
.Select(x => x.TotalMilliseconds / this.model.Duration.TotalMilliseconds)
.Subscribe(x => this.Progress = x)
.AddTo(this.disposables);
this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.ExecutionContext.CurrentExercise,
(ec, currentExercise) => ec == null ? null : currentExercise)
.Select(x => this.Exercises.SingleOrDefault(y => y.Model == x))
.ObserveOn(scheduler)
.Subscribe(x => this.CurrentExercise = x)
.AddTo(this.disposables);
var canStart = this
.WhenAnyValue(x => x.IsStarted)
.Select(x => !x);
this.startCommand = ReactiveCommand
.CreateFromObservable<TimeSpan?, Unit>(this.OnStart, canStart, scheduler)
.AddTo(this.disposables);
var canPause = this
.WhenAnyValue(x => x.IsStarted)
.CombineLatest(this.WhenAnyValue(x => x.ExecutionContext.IsPaused), (isStarted, isPaused) => isStarted && !isPaused)
.ObserveOn(scheduler);
this.pauseCommand = ReactiveCommand
.CreateFromObservable(this.OnPause, canPause, scheduler)
.AddTo(this.disposables);
var canResume = this
.WhenAnyValue(x => x.IsStarted)
.CombineLatest(this.WhenAnyValue(x => x.ExecutionContext.IsPaused), (isStarted, isPaused) => isStarted && isPaused)
.ObserveOn(scheduler);
this.resumeCommand = ReactiveCommand
.CreateFromObservable(this.OnResume, canResume, scheduler)
.AddTo(this.disposables);
var canSkipBackwards = this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.ProgressTimeSpan,
(ec, progress) => new { ExecutionContext = ec, Progress = progress })
.Select(x => x.ExecutionContext != null && x.Progress >= skipBackwardsThreshold)
.ObserveOn(scheduler);
this.skipBackwardsCommand = ReactiveCommand
.CreateFromObservable(this.OnSkipBackwards, canSkipBackwards, scheduler)
.AddTo(this.disposables);
var canSkipForwards = this
.WhenAnyValue(
x => x.ExecutionContext,
x => x.CurrentExercise,
(ec, currentExercise) => new { ExecutionContext = ec, CurrentExercise = currentExercise })
.Select(x => x.ExecutionContext != null && x.CurrentExercise != null && x.CurrentExercise != this.exercises.LastOrDefault())
.ObserveOn(scheduler);
this.skipForwardsCommand = ReactiveCommand
.CreateFromObservable(this.OnSkipForwards, canSkipForwards, scheduler)
.AddTo(this.disposables);
this.startCommand
.CanExecute
.Subscribe(x => this.IsStartVisible = x)
.AddTo(this.disposables);
this.pauseCommand
.CanExecute
.Subscribe(x => this.IsPauseVisible = x)
.AddTo(this.disposables);
this.resumeCommand
.CanExecute
.Subscribe(x => this.IsResumeVisible = x)
.AddTo(this.disposables);
this.startCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("start", ex))
.AddTo(this.disposables);
this.pauseCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("pause", ex))
.AddTo(this.disposables);
this.resumeCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("resume", ex))
.AddTo(this.disposables);
this.skipBackwardsCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("skip backwards", ex))
.AddTo(this.disposables);
this.skipForwardsCommand
.ThrownExceptions
.Subscribe(ex => this.OnThrownException("skip forwards", ex))
.AddTo(this.disposables);
// we don't use a reactive command here because switching in different commands causes it to get confused and
// command binding leaves the target button disabled. We could also have not used command binding to get around
// this problem
this.playbackCommand = new PlaybackCommandImpl(this);
// cancel the exercise program if the user navigates away
this
.hostScreen
.Router
.NavigationStack
.ItemsRemoved
.OfType<ExerciseProgramViewModel>()
.SelectMany(x => x.Stop())
.Subscribe()
.AddTo(this.disposables);
}