protected bool SetCurrentPositionCore(
int newPosition,
bool forceNotify,
CurrentChangeReason reason)
{
if (newPosition >= this.Count)
{
newPosition = this.Count - 1;
}
TDataItem dataItem = default(TDataItem);
if (newPosition >= 0 && newPosition < this.Count)
{
dataItem = this.Items[newPosition];
}
int num = (object)dataItem != null?dataItem.GetHashCode() : -1;
if (num != this.currentItemHashCode)
{
forceNotify = true;
this.currentItemHashCode = num;
}
if (this.CurrentPosition == newPosition && !forceNotify)
{
return(false);
}
if (this.update == 0)
{
CurrentChangingEventArgs changingEventArgs = new CurrentChangingEventArgs(reason);
this.OnCurrentChanging((CancelEventArgs)changingEventArgs);
if (changingEventArgs.Cancel)
{
return(false);
}
}
this.CurrentPosition = newPosition;
this.positionChangedInUpdate = this.update > 0;
if (this.update == 0)
{
this.OnCurrentChanged((EventArgs) new CurrentChangedEventArgs(reason));
}
return(true);
}
public CurrentChangedEventArgs(CurrentChangeReason reason)
{
this.reason = reason;
}