/// <summary>
/// Helper function that tries to remove a ReadDocumentViewModel.
/// </summary>
/// <param name="rdvm">The ReadDocumentViewModel</param>
private void tryRemoveRDVM(ReadDocumentViewModel rdvm)
{
if (rdvm == null)
{
return;
}
// Stop reading if it was reading the closing document
if (_readDoc == rdvm)
{
_reader.StopReading();
}
// Remove the viewmodel if it exists
if (_rdvms.Contains(rdvm))
{
_rdvms.Remove(rdvm);
}
}
public MainWindowViewModel(ReadDocumentManager docsMan)
{
// Add commandbindings
_reader = new DocumentReader();
_reader.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(_reader_PropertyChanged);
_commandBindings = new CommandBindingCollection();
CommandBinding NewCmdBinding = new CommandBinding(
ApplicationCommands.New, (t, e) => _docsMan.Add());
this.CommandBindings.Add(NewCmdBinding);
CommandBinding PlayCmdBinding = new CommandBinding(
MediaCommands.Play, PlayCmdExecuted, PlayCmdCanExecute);
this.CommandBindings.Add(PlayCmdBinding);
CommandBinding PauseCmdBinding = new CommandBinding(
MediaCommands.Pause, PauseCmdExecuted, PauseCmdCanExecute);
this.CommandBindings.Add(PauseCmdBinding);
CommandBinding StopCmdBinding = new CommandBinding(
MediaCommands.Stop, (t, e) => _reader.StopReading());
this.CommandBindings.Add(StopCmdBinding);
_docsMan = docsMan;
_rdvms = new ObservableCollection <ReadDocumentViewModel>();
//The easiest way to republate the viewmodel is to call the delegate that manages the changes
MainWindowViewModel_CollectionChanged(_docsMan.Documents, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
// To keep our ViewModelCollection up to date we need to listen for changes
((INotifyCollectionChanged)(_docsMan.Documents)).CollectionChanged += new NotifyCollectionChangedEventHandler(MainWindowViewModel_CollectionChanged);
// Select the first document if any.
Document = Documents.FirstOrDefault();
}