public void OnLayoutLoaded(LayoutLoadedArgs args)
{
var matchingAnchorables = args.LayoutAnchorables.Where(anch => anch.Content.GetType() == Definition.View &&
anch.Content.SafeCast <UserControl>().DataContext.GetType() == Definition.ViewModel &&
anch.IsVisible);
var rougeAnchorables = ActivePanels.Where(o => !matchingAnchorables.Select(anch => anch.Content.SafeCast <UserControl>().DataContext).
Contains(o.Content.SafeCast <UserControl>().DataContext));
foreach (var anchorable in rougeAnchorables.ToList())
{
RemoveDynamicPanel(anchorable);
}
foreach (var invalidationSubscription in InvalidationSubscriptions)
{
invalidationSubscription.Event.Unsubscribe(invalidationSubscription.Token);
}
InvalidationSubscriptions.Clear();
ActivePanels.Clear();
foreach (var anchorable in matchingAnchorables)
{
ResolveDynamicPanelDependencies(anchorable);
ActivePanels.Add(anchorable);
}
SyncSelection(ActivePanels.Select(o => o.Content.SafeCast <UserControl>().DataContext));
}
private void ClearDynamicPanels()
{
foreach (var anchorable in ActivePanels.ToList())
{
RemoveDynamicPanel(anchorable);
}
}
private void RemoveDynamicPanel(LayoutAnchorable anchorable)
{
var invalidationSubscriptions = InvalidationSubscriptions.Where(o => o.Object == anchorable).ToList();
foreach (var subscription in invalidationSubscriptions)
{
subscription.Break();
InvalidationSubscriptions.Remove(subscription);
}
var view = anchorable.Content.SafeCast <UserControl>();
var viewModel = view.DataContext;
view.DataContext = null;
if (viewModel is IDestructible destructible)
{
destructible.TearDown();
}
anchorable.Hiding -= OnRemoveHandler;
if (anchorable.GetRoot() == DockingView.DockingManager.Layout)
{
anchorable.Close();
}
ActivePanels.Remove(anchorable);
}
public static void AddPanel(ScreenSafePanel panel)
{
if (ActivePanels.Contains(panel))
{
return;
}
ActivePanels.Add(panel);
panel.ApplySafeArea(_currentSafeArea);
}
private void AddDynamicPanel(LayoutAnchorable anchorable)
{
var container = GetPrefferedLayoutContainer();
container.Children.Add(anchorable);
container.SelectedContentIndex = container.Children.IndexOf(anchorable);
ResolveDynamicPanelDependencies(anchorable);
ActivePanels.Add(anchorable);
}
public void BringPanelIntoView(object viewModel)
{
LayoutAnchorable anchorable = null;
try
{
anchorable = ActivePanels.Single(o => o.Content.SafeCast <UserControl>().DataContext == viewModel);
}
catch (InvalidOperationException)
{
throw new Exception($"Error bringing the dynamic panel associated with the ViewModel instance of type {viewModel.GetType().Name} into view : \n " +
$"The PanelSelectionBinding associated to the DynamicPanelDefinition of the given viewModelType does not contain the given instance");
}
var parent = anchorable.Parent.SafeCast <LayoutAnchorablePane>();
parent.SelectedContentIndex = parent.Children.IndexOf(anchorable);
}
private void OnSelectionBindingChanged()
{
var activeViewModels = ActivePanels.Select(o => o.Content.SafeCast <UserControl>().DataContext);
var addedItems = ViewModelSelection.SelectedObject.Except(activeViewModels).ToList();
foreach (var item in addedItems)
{
CreateAndAddDynamicPanel(item);
}
var removedItems = activeViewModels.Except(ViewModelSelection.SelectedObject).ToList();
foreach (var item in removedItems)
{
var anchorable = ActivePanels.Single(anch => anch.Content.SafeCast <UserControl>().DataContext == item);
RemoveDynamicPanel(anchorable);
}
}