private void AddDescriptor(UserDescriptor descriptor)
{
var viewModel = descriptor.Host == null?this.CreateInstance(this.authentication, descriptor, this.Owner) : descriptor.Host as UserTreeItemBase;
viewModel.Parent = this;
descriptor.Host = viewModel;
}
private void RemoveDescriptor(UserDescriptor descriptor)
{
foreach (var item in this.Items.ToArray())
{
if (item is UserTreeItemBase viewModel && viewModel.Descriptor == descriptor)
{
this.Items.Remove(viewModel);
}
}
}
public UserCategoryDescriptor(Authentication authentication, IUserCategory category, DescriptorTypes descriptorTypes, object owner)
: base(authentication, category, descriptorTypes)
{
this.category = category;
this.owner = owner ?? this;
this.category.Dispatcher.VerifyAccess();
this.categoryName = category.Name;
this.categoryPath = category.Path;
this.usersReadonly = new ReadOnlyObservableCollection <UserDescriptor>(this.users);
this.categoriesReadonly = new ReadOnlyObservableCollection <UserCategoryDescriptor>(this.categories);
if (this.descriptorTypes.HasFlag(DescriptorTypes.IsSubscriptable) == true)
{
this.category.Renamed += Category_Renamed;
this.category.Moved += Category_Moved;
this.category.Deleted += Category_Deleted;
}
if (this.descriptorTypes.HasFlag(DescriptorTypes.IsRecursive) == true)
{
if (this.descriptorTypes.HasFlag(DescriptorTypes.IsSubscriptable) == true)
{
this.category.Users.CollectionChanged += Users_CollectionChanged;
this.category.Categories.CollectionChanged += Categories_CollectionChanged;
}
foreach (var item in this.category.Categories)
{
var descriptor = new UserCategoryDescriptor(this.authentication, item, this.descriptorTypes, this.owner);
item.ExtendedProperties[this.owner] = descriptor;
this.categories.Add(descriptor);
}
foreach (var item in this.category.Users)
{
var descriptor = new UserDescriptor(this.authentication, item, this.descriptorTypes, this.owner);
item.ExtendedProperties[this.owner] = descriptor;
this.users.Add(descriptor);
}
}
}
protected virtual UserTreeItemBase CreateInstance(Authentication authentication, UserDescriptor descriptor, object owner)
{
return(new UserTreeItemBase(authentication, descriptor, owner));
}
private void Users_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
var descriptorList = new List <UserDescriptor>(e.NewItems.Count);
foreach (IUser item in e.NewItems)
{
if (item.ExtendedProperties.ContainsKey(this.owner) == true)
{
var descriptor = item.ExtendedProperties[this.owner] as UserDescriptor;
descriptorList.Add(descriptor);
}
else
{
var descriptor = new UserDescriptor(this.authentication, item, this.descriptorTypes, this.owner);
item.ExtendedProperties[this.owner] = descriptor;
descriptorList.Add(descriptor);
}
}
this.Dispatcher.InvokeAsync(() =>
{
foreach (var item in descriptorList)
{
this.users.Add(item);
}
});
}
break;
case NotifyCollectionChangedAction.Remove:
{
var descriptorList = new List <UserDescriptor>(e.OldItems.Count);
foreach (IUser item in e.OldItems)
{
var descriptor = item.ExtendedProperties[this.owner] as UserDescriptor;
descriptorList.Add(descriptor);
}
this.Dispatcher.InvokeAsync(() =>
{
foreach (var item in descriptorList)
{
this.users.Remove(item);
}
});
}
break;
case NotifyCollectionChangedAction.Move:
{
}
break;
case NotifyCollectionChangedAction.Reset:
{
this.Dispatcher.InvokeAsync(() =>
{
this.categories.Clear();
this.users.Clear();
});
}
break;
}
}
