public DirectoryViewModel(IScreen hostScreen, IDirectoryTools directoryTools)
{
this.directoryTools = directoryTools;
HostScreen = hostScreen;
var sourceDirectory = Preferences.Get("sourceDirectory", string.Empty);
subDirectories.DisposeWith(Disposables);
SelectedDirectory = new DirectoryContent(Path.GetFileName(sourceDirectory), sourceDirectory);
this.WhenAnyValue(vm => vm.SelectedDirectory)
.Where(x => x != null)
.Subscribe(directoryContent => SetDirectoryContent(directoryContent.FullPath))
.DisposeWith(Disposables);
subDirectoriesHelper = subDirectories.ToProperty(this, vm => vm.SubDirectories);
subDirectoriesHelper.DisposeWith(Disposables);
CmdSetSoureDirectory = ReactiveCommand.CreateFromTask(_ =>
{
Preferences.Set("sourceDirectory", SelectedDirectory.FullPath);
HostScreen.Router.Navigate.Execute(new ScannedChatsViewModel(hostScreen, directoryTools))
.Subscribe()
.DisposeWith(Disposables);
return(Task.FromResult(Unit.Default));
})
.SetupErrorHandling(Disposables);
SetDirectoryContent(sourceDirectory);
}
public FileVersionListViewModel()
{
this._versionedFiles = _versionedFilesChanges.ToProperty(this, nameof(VersionedFiles));
}
protected ToolViewModel(Guid toolId)
{
Pages = _pages;
ToolId = toolId;
// Listen for the page count changing
var currentWithCount = _pages.CountChanged
.CombineLatest(_currentPageIndex, (count, current) =>
new { Count = count, Current = current })
.Publish(); // We have multiple listenser, so publish the value (multicast)
// Enable the next page command when the count is less than the total number of pages
var nextPageCmd = new ReactiveCommand(currentWithCount.Select(t =>
t.Current + 1 < t.Count &&
t.Count > 1));
// When the command is invoked, call GoToPage with the next page num.
_nextPageSub = nextPageCmd
.RegisterAsyncAction(_ =>
GoToPage(_currentPageIndex.Value + 1), // _currentPageIndex stores the current value
Scheduler.Immediate)
.Subscribe();
// Enable the preious page if current is greater than 0 and there's at least two pages
var prevPageCmd = new ReactiveCommand(currentWithCount.Select(t =>
t.Current > 0 &&
t.Count > 1));
// When the command is invoked, call GoToPage with the previous index
_prevPageSub = prevPageCmd
.RegisterAsyncAction(_ =>
GoToPage(_currentPageIndex.Value - 1), // _currentPageIndex stores the current value
Scheduler.Immediate)
.Subscribe();
NextPageCommand = nextPageCmd;
PreviousPageCommand = prevPageCmd;
// When the current index changes, get the current tool and expose it as a property
// As pages flow through,
_currentPageIndex
.Select(i => i >= 0 ? _pages[i] : (IToolPage)null)
.DistinctUntilChanged()
.Scan((prev, current) =>
{
if (prev != null)
{
prev.OnNavigatedAway();
}
if (current != null)
{
current.OnNavigatedTo();
}
// This element will become prev on the next pass
return(current);
})
.ToProperty(this, tvm => tvm.CurrentPage, out _currentPage);
// Expose the current page index as a property
_currentPageIndex.ToProperty(this, tvm => tvm.CurrentPageNumber, out _currentPageNumber);
// Once all of our listeners are attached, turn on the stream
_currentSub = currentWithCount.Connect();
}
