public CollectionChange(CollectionChangeType type, int sourceIndex, int destinationIndex, int count)
{
Type = type;
SourceIndex = sourceIndex;
DestinationIndex = destinationIndex;
Count = count;
}
private void OnChange(T item, CollectionChangeType type)
{
if (Change != null)
{
this.Change(item, type);
}
}
void Notify(CollectionChangeType type, T item)
{
if (this.Changed != null)
{
this.Changed(type, item);
}
}
public void RaisePrimitiveCollectionChanged(ICartesianPrimitive primitive, CollectionChangeType changeType)
{
PrimitiveCollectionChanged(this,
new PrimitiveCollectionChangedEventArgs()
{
Primitive = primitive,
IsAdded = changeType
});
}
/// <summary>
/// Constructor used for add/delete/replace
/// </summary>
/// <param name="coll">Collection to work with</param>
/// <param name="type">Type of change</param>
/// <param name="oldPos">Position of change</param>
/// <param name="newPos">New position of change</param>
/// <param name="oldValue">Old value at position</param>
/// <param name="newValue">New value at position</param>
public CollectionChangeUndo(IList coll, CollectionChangeType type,
int oldPos, int newPos, object oldValue, object newValue)
{
_collection = coll;
_changeType = type;
_pos = oldPos;
_newPos = newPos;
_oldValue = oldValue;
_newValue = newValue;
}
public void AddCollectionChangedItem_Adds_ChangedItem(CollectionChangeType changeType)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", null, changeType));
// assert
Assert.True(propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
/// <summary>
/// Initializes a new instance of the <see cref="CollectionChangeUndo"/> class.
/// </summary>
/// <param name="collection">Collection to work with.</param>
/// <param name="type">Type of change.</param>
/// <param name="oldPosition">Position of change.</param>
/// <param name="newPosition">New position of change.</param>
/// <param name="oldValue">Old value at position.</param>
/// <param name="newValue">New value at position.</param>
/// <param name="tag">The tag.</param>
/// <exception cref="ArgumentNullException">The <paramref name="collection" /> is <c>null</c>.</exception>
public CollectionChangeUndo(IList collection, CollectionChangeType type, int oldPosition, int newPosition,
object oldValue, object newValue, object tag = null)
: base(collection, tag)
{
Argument.IsNotNull("collection", collection);
ChangeType = type;
Position = oldPosition;
NewPosition = newPosition;
OldValue = oldValue;
NewValue = newValue;
CanRedo = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="CollectionChangeUndo"/> class.
/// </summary>
/// <param name="collection">Collection to work with.</param>
/// <param name="type">Type of change.</param>
/// <param name="oldPosition">Position of change.</param>
/// <param name="newPosition">New position of change.</param>
/// <param name="oldValue">Old value at position.</param>
/// <param name="newValue">New value at position.</param>
/// <param name="tag">The tag.</param>
/// <exception cref="ArgumentNullException">The <paramref name="collection" /> is <c>null</c>.</exception>
public CollectionChangeUndo(IList collection, CollectionChangeType type, int oldPosition, int newPosition,
object oldValue, object newValue, object tag = null)
: base(collection, tag)
{
Argument.IsNotNull("collection", collection);
ChangeType = type;
Position = oldPosition;
NewPosition = newPosition;
OldValue = oldValue;
NewValue = newValue;
CanRedo = true;
}
/// <summary>
/// Tries to get the changed collection items.
/// </summary>
/// <param name="propertyName">The property name.</param>
/// <param name="changeType">The collection change type.</param>
/// <param name="items">The items.</param>
/// <returns>Returns true if the changed values could be recovered.</returns>
public bool TryGetChangedCollectionItems(string propertyName, CollectionChangeType changeType, out List <Entity> items)
{
items = new List <Entity>();
var collectionChanges = _collectionChangedItems.Where(x => x.PropertyName == propertyName && x.CollectionChangeType == changeType);
if (!collectionChanges.Any())
{
return(false);
}
items = collectionChanges.Select(x => x.Item).ToList();
return(true);
}
public void AddCollectionChangedItem_Prevents_Unneccessary_Changes(CollectionChangeType changeType)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
var oppositeChangeType = changeType == CollectionChangeType.Added ? CollectionChangeType.Removed : CollectionChangeType.Added;
var statisticValue = new ArtistStatisticValues();
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", statisticValue, changeType));
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", statisticValue, oppositeChangeType));
// assert
Assert.False(propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
private CollectionChangedArgs(
CollectionChangeType type,
IVMCollection <TItemVM> collection,
IEnumerable <TItemVM> oldItems = null,
IEnumerable <TItemVM> newItems = null,
IChangeReason reason = null
)
{
Type = type;
Collection = collection;
Index = -1;
OldItems = oldItems ?? Enumerable.Empty <TItemVM>();
NewItems = newItems ?? Enumerable.Empty <TItemVM>();
Reason = reason;
}
/// <summary>
/// Initializes a new instance of the <see cref="CollectionChangedEventArgs<T>"/> class.
/// </summary>
/// <param name="changeType">Type of the change.</param>
/// <param name="index">The index.</param>
/// <param name="oldIndex">The old index.</param>
/// <param name="item">The item.</param>
public CollectionChangedEventArgs(CollectionChangeType changeType, int index, int oldIndex, T item)
{
//if( trace.IsDebugLevel )
//{
// trace.Debug( "CollectionChangedEventArgs.ctor( CollectionChangeType, int, {0} )", typeof( T ).Name );
// trace.Debug( "changeType: {0}", changeType );
// trace.Debug( "index: {0}", index );
// trace.Debug( "oldIndex: {0}", oldIndex );
// trace.Debug( "item: {0}", item == null ? "<null>" : item.ToString() );
//}
this.ChangeType = changeType;
this.Index = index;
this.OldIndex = oldIndex;
this.Item = item;
}
private CollectionChangedArgs(
CollectionChangeType type,
IVMCollection <TItemVM> collection,
int index,
TItemVM oldItem = default(TItemVM),
TItemVM newItem = default(TItemVM)
)
{
Type = type;
Collection = collection;
Index = index;
OldItem = oldItem;
OldItems = oldItem != null ? new[] { oldItem } : Enumerable.Empty <TItemVM>();
NewItem = newItem;
NewItems = newItem != null ? new[] { newItem } : Enumerable.Empty <TItemVM>();
}
public DictionaryEventArgs(CollectionChangeType changeType, object[] keys, object[] newItems, object[] oldItems = null)
: base(changeType, newItems, oldItems)
{
this.Keys = keys;
}
/// <summary>
/// Initializes a new CollectionChange
/// </summary>
/// <param name="propertyName">The property name.</param>
/// <param name="item">The entity item.</param>
/// <param name="changeType">The collection changed type.</param>
public CollectionChangedItem(string propertyName, Entity item, CollectionChangeType changeType)
{
PropertyName = propertyName;
Item = item;
CollectionChangeType = changeType;
}
protected CollectionEventArgs(CollectionChangeType changeType, object[] newItems, object[] oldItems = null)
{
this.ChangeType = changeType;
this.Items = newItems;
this.OldItems = oldItems ?? emptyArray;
}
/// <summary>
/// Initializes a new instance of the <see cref="CollectionChangedEventArgs"/> class.
/// </summary>
/// <param name="changeType">Type of the change.</param>
public CollectionChangedEventArgs(CollectionChangeType changeType) : base()
{
_changeType = changeType;
}
public CollectionChange(object item, int index, CollectionChangeType type)
{
Item = item;
OldIndex = NewIndex = index;
Type = type;
}
public CollectionChangeEvent(CollectionChangeType type)
{
Type = type;
}
/// <summary>
/// Creates new instance.
/// </summary>
/// <param name="context"></param>
/// <param name="type"></param>
public CollectionChangedEventArgs(ITypeDescriptorContext context, CollectionChangeType type)
{
this.Context = context;
this.Type = type;
}
public IEnumerable <IJsCsGlue> GetGlues(CollectionChangeType @type) => IndividualChanges.Where(ch => ch.CollectionChangeType == @type).Select(change => change.Glue);
/// <summary>
/// Tries to get the changed collection items.
/// </summary>
/// <typeparam name="T">The entity type.</typeparam>
/// <typeparam name="TEntityItem">The collection item type.</typeparam>
/// <param name="expression">The expression.</param>
/// <param name="changeType">The collection change type.</param>
/// <param name="items">The changed items.</param>
/// <returns>Returns true if the changed values could be recovered.</returns>
public bool TryGetChangedCollectionItems <T, TEntityItem>(Expression <Func <T, object> > expression, CollectionChangeType changeType, out List <TEntityItem> items) where T : Entity
{
items = new List <TEntityItem>();
var collectionChanges = _collectionChangedItems.Where(x => x.PropertyName == GetPropertyName(expression) && x.CollectionChangeType == changeType);
if (!collectionChanges.Any())
{
return(false);
}
items = collectionChanges.Select(x => x.Item).OfType <TEntityItem>().ToList();
return(true);
}
public IndividualJavascriptCollectionChange(CollectionChangeType collectionChange, int index, IJavascriptObject @object)
{
CollectionChangeType = collectionChange;
Index = index;
Object = @object;
}
/// <summary>
/// Adds a new collection changed item.
/// </summary>
/// <param name="property">The property.</param>
/// <param name="entityItem">The added or removed entity.</param>
/// <param name="changeType">The collection change type.</param>
public void AddCollectionChangedItem(string property, Entity entityItem, CollectionChangeType changeType)
{
AddCollectionChangedItem(new CollectionChangedItem(property, entityItem, changeType));
}
public IndividualJavascriptCollectionChange(CollectionChangeType iCollectionChange, int iIndex, IJavascriptObject iObject)
{
CollectionChangeType=iCollectionChange;
Index= iIndex;
Object = iObject;
}
public IndividualCollectionChange(CollectionChangeType iCollectionChange, int iIndex, IJSCSGlue iObject)
{
CollectionChangeType=iCollectionChange;
Index= iIndex;
Object = iObject;
}
public IndividualJavascriptCollectionChange(CollectionChangeType iCollectionChange, int iIndex, IJavascriptObject iObject)
{
CollectionChangeType = iCollectionChange;
Index = iIndex;
Object = iObject;
}
public CollectionChangedEventArgs(CollectionChangeType type)
{
changeType = type;
}
public CollectionChangedEventArgs(CollectionChangeType type)
{
changeType = type;
}
public CollectionChangeEvent(IStatusUpdate item, CollectionChangeType type)
{
Item = item;
Type = type;
}
public IndividualCollectionChange(CollectionChangeType iCollectionChange, int iIndex, IJSCSGlue iObject)
{
CollectionChangeType = iCollectionChange;
Index = iIndex;
Object = iObject;
}
public CollectionChangeEvent(object item, int index, CollectionChangeType type)
{
Item = item;
OldIndex = NewIndex = index;
Type = type;
}
/// <summary>
/// Adds a new collection changed item.
/// </summary>
/// <typeparam name="T">The entity type.</typeparam>
/// <param name="propertyExpression">The expression representing the local property.</param>
/// <param name="entityItem">The added or removed entity.</param>
/// <param name="changeType">The collection change type.</param>
public void AddCollectionChangedItem <T>(Expression <Func <T, object> > propertyExpression, Entity entityItem, CollectionChangeType changeType) where T : Entity
{
AddCollectionChangedItem(GetPropertyName(propertyExpression), entityItem, changeType);
}
/// <summary>
/// Initializes a new instance of the <see cref="CollectionChangedEventArgs<T>"/> class.
/// </summary>
/// <param name="changeType">Type of the change.</param>
public CollectionChangedEventArgs(CollectionChangeType changeType)
: this(changeType, -1, -1, default(T))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CollectionChangedEventArgs<T>"/> class.
/// </summary>
/// <param name="changeType">Type of the change.</param>
/// <param name="index">The index.</param>
public CollectionChangedEventArgs(CollectionChangeType changeType, int index)
: this(changeType, index, -1, default(T))
{
}
protected ListEventArgs(CollectionChangeType changeType, int[] indexes, object[] newItems, object[] oldItems = null)
: base(changeType, newItems, oldItems)
{
this.Indices = indexes;
}
/// <summary>
/// Called when the collection has been changed.
/// </summary>
/// <param name="changeType">Type of the change.</param>
/// <remarks>Triggers the <see cref="CollectionChanged"/> event.</remarks>
private void OnCollectionChanged(CollectionChangeType changeType)
{
OnCollectionChanged(this, new CollectionChangedEventArgs(changeType));
}
