/// <summary>
/// Called when a property has changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.ComponentModel.PropertyChangedEventArgs"/> instance containing the event data.</param>
/// <remarks>
/// This method must be public because the <see cref="IWeakEventListener"/> is used.
/// </remarks>
public void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
var modelBase = sender as ModelBase;
if (modelBase != null)
{
if ((string.CompareOrdinal(e.PropertyName, "INotifyDataErrorInfo.HasErrors") == 0) ||
(string.CompareOrdinal(e.PropertyName, "INotifyDataWarningInfo.HasWarnings") == 0) ||
(string.CompareOrdinal(e.PropertyName, "IsDirty") == 0))
{
return;
}
}
if (ShouldPropertyBeIgnored(sender, e.PropertyName))
{
return;
}
var oldValue = _previousPropertyValues[e.PropertyName];
var newValue = PropertyHelper.GetPropertyValue(sender, e.PropertyName, false);
// CTL-719: ignore duplicate properties
if (ObjectHelper.AreEqual(oldValue, newValue))
{
return;
}
_previousPropertyValues[e.PropertyName] = newValue;
MementoService.Add(new PropertyChangeUndo(sender, e.PropertyName, oldValue, newValue, Tag));
}
/// <summary>
/// This is invoked when the collection changes.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Collections.Specialized.NotifyCollectionChangedEventArgs"/> instance containing the event data.</param>
/// <remarks>
/// This method must be public because the <see cref="IWeakEventListener"/> is used.
/// </remarks>
public void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
Log.Debug("Automatically tracking change '{0}' of collection", e.Action);
var undoList = new List <CollectionChangeUndo>();
var collection = (IList)sender;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
undoList.AddRange(e.NewItems.Cast <object>().Select((item, i) => new CollectionChangeUndo(collection, CollectionChangeType.Add, -1, e.NewStartingIndex + i, null, item, Tag)));
break;
case NotifyCollectionChangedAction.Remove:
undoList.AddRange(e.OldItems.Cast <object>().Select((item, i) => new CollectionChangeUndo(collection, CollectionChangeType.Remove, e.OldStartingIndex + i, -1, item, null, Tag)));
break;
case NotifyCollectionChangedAction.Replace:
undoList.Add(new CollectionChangeUndo(collection, CollectionChangeType.Replace, e.OldStartingIndex, e.NewStartingIndex, e.OldItems[0], e.NewItems[0], Tag));
break;
#if NET
case NotifyCollectionChangedAction.Move:
undoList.Add(new CollectionChangeUndo(collection, CollectionChangeType.Move, e.OldStartingIndex, e.NewStartingIndex, e.NewItems[0], e.NewItems[0], Tag));
break;
#endif
}
foreach (var operation in undoList)
{
MementoService.Add(operation);
}
Log.Debug("Automatically tracked change '{0}' of collection", e.Action);
}
