public void MultipleActionsWithoutSuspendingNotifications()
{
var counter = 0;
var fastCollection = new FastObservableCollection <int>();
fastCollection.AutomaticallyDispatchChangeNotifications = false;
fastCollection.CollectionChanged += (sender, e) => counter++;
fastCollection.Add(0);
fastCollection.Add(1);
fastCollection.Remove(0);
fastCollection.Remove(1);
fastCollection.AddRange(new[] { 1, 2 });
fastCollection[0] = 5;
fastCollection.Move(0, 1);
fastCollection.Clear();
Assert.AreEqual(9, counter);
}
public void RemovingItemsInRemovingMode()
{
var counter = 0;
var eventArgs = (NotifyCollectionChangedEventArgs)null;
var fastCollection = new FastObservableCollection <int> {
1, 2, 3, 4, 5
};
fastCollection.AutomaticallyDispatchChangeNotifications = false;
fastCollection.CollectionChanged += (sender, e) =>
{
counter++;
eventArgs = e;
};
using (fastCollection.SuspendChangeNotifications(SuspensionMode.Removing))
{
fastCollection.Remove(1);
fastCollection.Remove(2);
fastCollection.Remove(3);
fastCollection.Remove(4);
fastCollection.Remove(5);
}
Assert.AreEqual(1, counter);
Assert.AreEqual(NotifyCollectionChangedAction.Remove, eventArgs.Action);
CollectionAssert.AreEqual(eventArgs.OldItems, new[] { 1, 2, 3, 4, 5 });
}
public void SuspendsValidationWhileAddingAndRemovingItems()
{
var counter = 0;
var fastCollection = new FastObservableCollection <int>();
fastCollection.AutomaticallyDispatchChangeNotifications = false;
fastCollection.CollectionChanged += (sender, e) => counter++;
using (fastCollection.SuspendChangeNotifications())
{
fastCollection.Add(1);
fastCollection.Add(2);
fastCollection.Add(3);
fastCollection.Add(4);
fastCollection.Add(5);
fastCollection.Remove(5);
fastCollection.Remove(4);
fastCollection.Remove(3);
fastCollection.Remove(2);
fastCollection.Remove(1);
}
Assert.AreEqual(0, counter);
}
/// <summary>
/// Updates the entries (via Remove and Add) in the ALL items collection
/// with the entries in the <param name="viewModels"/> array parameter.
/// </summary>
/// <param name="viewModels"></param>
private void UpdateAllEntries(params VM[] viewModels)
{
Logger.InfoFormat("_");
_All.SuspendCollectionChangeNotification();
try
{
var removeItems = _All.Where(vm => !viewModels.Contains(vm)).ToList();
var addItems = viewModels.Where(vm => !_All.Contains(vm)).ToList();
foreach (var vm in removeItems)
{
_All.Remove(vm);
}
foreach (var vm in addItems)
{
_All.Add(vm);
}
}
finally
{
_All.NotifyChanges();
if (this.EntriesChanged != null)
{
this.EntriesChanged(this, EventArgs.Empty);
}
}
}
private void updateEntries(params VM[] viewModels)
{
FastObservableCollection <VM> all = All as FastObservableCollection <VM>;
all.SuspendCollectionChangeNotification();
var removeItems = all.Where(vm => !viewModels.Contains(vm)).ToList();
var addItems = viewModels.Where(vm => !all.Contains(vm)).ToList();
if (addItems.Count == 0 && removeItems.Count == 0)
{
return; //nothing to do here
}
foreach (var vm in removeItems)
{
all.Remove(vm);
}
foreach (var vm in addItems)
{
all.Add(vm);
}
_subItemList = all.ToArray().ToList();
all.NotifyChanges();
EntriesChanged?.Invoke(this, EventArgs.Empty);
}
private void updateEntries(params VM[] viewModels)
{
FastObservableCollection <VM> all = All as FastObservableCollection <VM>;
all.SuspendCollectionChangeNotification();
var removeItems = all.Where(vm => !viewModels.Contains(vm)).ToList();
var addItems = viewModels.Where(vm => !all.Contains(vm)).ToList();
foreach (var vm in removeItems)
{
all.Remove(vm);
}
foreach (var vm in addItems)
{
all.Add(vm);
}
_subItemList = all.ToArray().ToList();
all.NotifyChanges();
if (EntriesChanged != null)
{
EntriesChanged(this, EventArgs.Empty);
}
}
public static void MoveItemToTop <T>(this FastObservableCollection <T> collection, T item)
{
using (collection.SuspendChangeNotifications())
{
collection.Remove(item);
collection.Insert(0, item);
}
}
public void ThrowsInvalidOperationExceptionForRemovingInAddingMode()
{
var fastCollection = new FastObservableCollection <int> {
0
};
using (fastCollection.SuspendChangeNotifications(SuspensionMode.Adding))
{
Assert.Throws <InvalidOperationException>(() => fastCollection.Remove(0));
}
}
public void SuspendsValidationWhileAddingAndRemovingItems()
{
int counter = 0;
var fastCollection = new FastObservableCollection<int>();
fastCollection.AutomaticallyDispatchChangeNotifications = false;
fastCollection.CollectionChanged += (sender, e) => counter++;
using (fastCollection.SuspendChangeNotifications())
{
fastCollection.Add(1);
fastCollection.Add(2);
fastCollection.Add(3);
fastCollection.Add(4);
fastCollection.Add(5);
fastCollection.Remove(5);
fastCollection.Remove(4);
fastCollection.Remove(3);
fastCollection.Remove(2);
fastCollection.Remove(1);
}
Assert.AreEqual(1, counter);
}