/// <summary>
/// Refreshes the <see cref="TimelineSegmentProvidingViewModelBase.SegmentViewModels"/> collection
/// so that each model in the <see cref="TimelineSegmentProvidingViewModelBase.SegmentModels"/> collection
/// has a corresponding view model for interacting with the timeline and video overlay views.
/// </summary>
protected virtual void RefreshSegmentViewModels()
{
SegmentViewModels.CollectionChanged -= OnSegmentViewModelsCollectionChanged;
if (SegmentModels != null)
{
SegmentModels.CollectionChanged -= OnSegmentModelsCollectionChanged;
// Remove excess items
if (SegmentViewModels.Count > SegmentModels.Count)
{
for (int i = SegmentViewModels.Count - 1; i >= SegmentModels.Count; i--)
{
SegmentViewModels.RemoveAt(i);
}
Debug.Assert(SegmentViewModels.Count == SegmentModels.Count);
}
for (int i = 0; i < SegmentModels.Count; i++)
{
if (i < SegmentViewModels.Count)
{
if (!SegmentViewModels[i].Model.Equals(SegmentModels[i]))
{
SegmentViewModels[i] = SegmentViewModelFactory.CreateSegmentViewModel(SegmentModels[i]);
}
}
else
{
SegmentViewModels.Add(SegmentViewModelFactory.CreateSegmentViewModel(SegmentModels[i]));
}
}
SegmentModels.CollectionChanged += OnSegmentModelsCollectionChanged;
}
else
{
SegmentViewModels.Clear();
}
SegmentViewModels.CollectionChanged += OnSegmentViewModelsCollectionChanged;
}
/// <summary>
/// Handles the <see cref="IProjectService.ProjectClosing"/> event for the <see cref="_projectService"/> instance.
/// </summary>
/// <inheritdoc cref="EventHandler"/>
protected virtual void OnProjectClosing(object sender, EventArgs e)
{
_scriptVideoService.FrameChanged -= OnScriptVideoFrameNumberChanged;
SegmentModels.CollectionChanged -= OnSegmentModelsCollectionChanged;
SegmentViewModels.CollectionChanged -= OnSegmentViewModelsCollectionChanged;
if (SelectedSegment != null)
{
SelectedSegment.PropertyChanged -= OnSelectedSegmentInstancePropertyChanged;
SelectedSegment = null;
}
_undoRoot.Clear();
_activeSegmentDictionary.Clear();
SegmentViewModels.Clear();
RaisePropertyChanged(nameof(ActiveSegments));
RaisePropertyChanged(nameof(SegmentViewModels));
RaisePropertyChanged(nameof(UndoStack));
RaisePropertyChanged(nameof(RedoStack));
}
