protected internal override void AddView(INavigableRegion region, ReactiveViewModel viewModel)
{
var items = RegionTarget.ItemsSource as IList ?? RegionTarget.Items as IList;
if (items != null)
{
var sortableItem = viewModel as ISortable;
if (sortableItem != null)
{
var insertAtIndex = items.Count -
items
.OfType <FrameworkElement>()
.Select(x => x.DataContext)
.Cast <ISortable>()
.OrderBy(x => x.SortHint)
.SkipWhile(x => x.SortHint < sortableItem.SortHint)
.Count();
items.Insert(insertAtIndex, sortableItem);
}
else
{
items.Add(viewModel);
}
}
}
protected internal override void ActivateView(INavigableRegion region, ReactiveViewModel viewModel)
{
object view;
if (_cachedViews.TryGetValue(viewModel, out view))
{
RegionTarget.Content = view;
}
}
protected internal override void RemoveView(INavigableRegion region, ReactiveViewModel viewModel)
{
var items = RegionTarget.ItemsSource as IList ?? RegionTarget.Items as IList;
if (items.Contains(viewModel))
{
items.Remove(viewModel);
}
}
protected internal override void AdaptToRegionTarget(INavigableRegion region)
{
AddDisposable(
Observable
.FromEventPattern <SelectionChangedEventArgs>(RegionTarget, "SelectionChanged")
.Where(e => ReferenceEquals(e.EventArgs.OriginalSource, RegionTarget))
.Where(_ => !_suppressSelectionChanged)
.Where(_ => RegionTarget.SelectedItem != null)
.Do(_ => region.RequestNavigate(RegionTarget.SelectedItem as ReactiveViewModel, NavigationParameters.UserNavigation)) // TODO: SelectMany?
.Subscribe());
}
protected internal override void ActivateView(INavigableRegion region, ReactiveViewModel viewModel)
{
try
{
_suppressSelectionChanged = true;
RegionTarget.SelectedItem = viewModel;
}
finally
{
_suppressSelectionChanged = false;
}
}
protected internal override void RemoveView(INavigableRegion region, ReactiveViewModel viewModel)
{
RegionTarget.Content = null;
object view;
if (_cachedViews.TryRemove(viewModel, out view))
{
var disposable = view as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
}
public void Adapt(INavigableRegion region)
{
if (region == null)
{
throw new ArgumentNullException("region", "region is null.");
}
AddDisposable(region.Added.Do(vm => AddView(region, vm)).Subscribe());
AddDisposable(region.Removed.Do(vm => RemoveView(region, vm)).Subscribe());
AddDisposable(region.Activated.Do(vm => ActivateView(region, vm)).Subscribe());
AddDisposable(region.Activated.Do(vm => DeactivateView(region, vm)).Subscribe());
AddDisposable(region.Initialized.Do(vm => InitializeView(region, vm)).Subscribe());
AdaptToRegionTarget(region);
}
private void AddViewFor(INavigableRegion region, ReactiveViewModel viewModel)
{
var view = _viewFactory.CreateViewFor(viewModel);
var tabViewModel = new TabViewModel(region, viewModel);
var tabView = new TabView()
{
DataContext = tabViewModel
};
var tab = new TabItem
{
Header = tabView,
Content = view
};
_viewContainer.Add(viewModel, tab);
_regionTarget.Items.Add(tab);
}
public void Adapt(INavigableRegion region)
{
if (region == null)
{
throw new ArgumentNullException("region", "region is null.");
}
_disposables.Add(region.Added.Do(vm => AddViewFor(region, vm)).Subscribe());
_disposables.Add(region.Removed.Do(vm => RemoveViewFor(vm)).Subscribe());
_disposables.Add(region.Activated.Do(vm => ActivateViewFor(vm)).Subscribe());
_disposables.Add(
Observable
.FromEventPattern <SelectionChangedEventArgs>(_regionTarget, "SelectionChanged")
.Where(e => ReferenceEquals(e.EventArgs.OriginalSource, _regionTarget))
.Where(_ => !_suppressSelectionChanged)
.Where(_ => _regionTarget.SelectedItem != null)
.Do(_ => region.RequestNavigate(LookupViewModel(_regionTarget.SelectedItem), NavigationParameters.UserNavigation)) // TODO: SelectMany?
.Subscribe());
}
internal protected virtual void AdaptToRegionTarget(INavigableRegion region)
{
}
internal protected abstract void InitializeView(INavigableRegion region, ReactiveViewModel viewModel);
internal protected abstract void DeactivateView(INavigableRegion region, ReactiveViewModel viewModel);
protected internal override void InitializeView(INavigableRegion region, ReactiveViewModel viewModel)
{
}
protected internal override void DeactivateView(INavigableRegion region, ReactiveViewModel viewModel)
{
}
protected internal override void AddView(INavigableRegion region, ReactiveViewModel viewModel)
{
var view = _cachedViews.GetOrAdd(viewModel, _viewFactory.CreateViewFor(viewModel));
RegionTarget.Content = view;
}
