/// <summary>
/// Called when events are resumed the last time, i.e. is not fired when nested.
/// Fires the <see cref="DataChanged"/> event when changes are pending.
/// </summary>
protected override void OnEventsResumed()
{
lock (SyncRoot)
{
// Fire pending DataChanged event
if (_lastChangeAction.HasValue)
{
// Build event
var properties = new List <Guid>(_committedPropertiesChanged);
foreach (var property in _instancePropertiesChanged)
{
if (!properties.Contains(property))
{
properties.Add(property);
}
}
var args = new DataObjectChangeEventArgs(_lastChangeAction.Value, properties.ToArray());
// Clear cache
_committedPropertiesChanged.Clear();
_instancePropertiesChanged.Clear();
_lastChangeAction = null;
// Fire event
if (DataChanged != null)
{
OnDataChanged(args);
}
}
// Call base class method
base.OnEventsResumed();
}
}
/// <summary>
/// Notifies this object that a related data object has changed.
/// </summary>
/// <param name="changed">Changed data object instance.</param>
/// <param name="change">Change details.</param>
public void NotifyChange(IDataObject changed, DataObjectChangeEventArgs change)
{
lock (SyncRoot)
{
// Suspend events
SuspendEvents();
try
{
// Notify subclass
OnChangeNotification(changed, change);
}
finally
{
// Resume events
ResumeEvents();
}
}
}
/// <summary>
/// Bubbles the <see cref="DataObject.DataChanged"/> event of an item in this collection.
/// </summary>
protected virtual void OnItemDataChanged(object sender, DataObjectChangeEventArgs e)
{
// Fire event
ItemDataChanged?.Invoke(sender, e);
}
/// <summary>
/// Handles change notification events, when this object is notified that
/// a related data object has changed via the <see cref="NotifyChange"/> method.
/// </summary>
/// <remarks>
/// Thread safe locking, <see cref="EventObject.SuspendEvents"/> and <see cref="EventObject.ResumeEvents"/> are handled by the caller.
/// The base class implementation does nothing.
/// </remarks>
/// <param name="changed">Changed data object instance.</param>
/// <param name="change">Change details.</param>
protected virtual void OnChangeNotification(IDataObject changed, DataObjectChangeEventArgs change)
{
}
/// <summary>
/// Fires the <see cref="DataChanged"/> event.
/// </summary>
protected virtual void OnDataChanged(DataObjectChangeEventArgs change)
{
// Fire event
DataChanged?.Invoke(this, change);
}
