protected virtual bool beforeRemoveAt(int index)
{
bool cancel = false;
BeforeRemoveAtEventHandler evt = BeforeRemoveAt;
BeforeActionEventHandler ae = BeforeAction;
if (evt != null)
{
evt(this, ref index, ref cancel);
}
if (ae != null)
{
ae(this, new ActionEventArgs(ListAction.RemoveAt, index), ref cancel);
}
return(cancel);
}
protected virtual bool beforeRemoveRange(ref int start, ref int count)
{
bool cancel = false;
BeforeRemoveRangeEventHandler evt = BeforeRemoveRange;
BeforeActionEventHandler ae = BeforeAction;
if (evt != null)
{
evt(this, ref start, ref count, ref cancel);
}
if (ae != null)
{
ae(this, new ActionEventArgs(ListAction.RemoveRange), ref cancel);
}
return(cancel);
}
protected virtual bool beforeAddRange(IEnumerable <T> coll)
{
bool cancel = false;
BeforeAddRangeEventHandler evt = BeforeAddRange;
BeforeActionEventHandler ae = BeforeAction;
if (evt != null)
{
evt(this, coll, ref cancel);
}
if (ae != null)
{
ae(this, new ActionEventArgs(ListAction.AddRange, coll), ref cancel);
}
return(cancel);
}
/// <summary>Returns TRUE if Insert action should be cancelled.</summary>
protected virtual bool beforeClear()
{
bool cancel = false;
BeforeActionEventHandler ae = BeforeAction;
BeforeClearEventHandler evt = BeforeClear;
if (evt != null)
{
evt(this, ref cancel);
}
if (ae != null)
{
ae(this, new ActionEventArgs(ListAction.Clear), ref cancel);
}
return(cancel);
}
/// <summary>Returns TRUE if Insert action should be cancelled.</summary>
protected virtual bool beforeInsert(ref T item)
{
bool cancel = false;
EventyListBeforeEventHandler evt = BeforeInsert;
BeforeActionEventHandler ae = BeforeAction;
if (evt != null)
{
evt(this, ref item, ref cancel);
}
if (ae != null)
{
ae(this, new ActionEventArgs(ListAction.Insert, item), ref cancel);
}
return(cancel);
}
/// <summary>Returns TRUE if Set action should be cancelled.</summary>
protected virtual bool beforeSet(ref T oldValue, ref T newValue)
{
bool cancel = false;
BeforeSetEventHandler evt = BeforeSet;
BeforeActionEventHandler ae = BeforeAction;
if (evt != null)
{
evt(this, ref oldValue, ref newValue, ref cancel);
}
if (ae != null)
{
ae(this, new ActionEventArgs(ListAction.Set, oldValue, newValue), ref cancel);
}
return(cancel);
}
