private void OnExpandedItemCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
ToggleItemRowsExpansion(e.NewItems, true);
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
ToggleItemRowsExpansion(e.OldItems, false);
}
if (e.Action == NotifyCollectionChangedAction.Replace)
{
ToggleItemRowsExpansion(e.OldItems, false);
ToggleItemRowsExpansion(e.NewItems, true);
}
if (e.Action == NotifyCollectionChangedAction.Reset)
{
for (int i = 0; i < TargetControl.VisibleRowCount; i++)
{
int rowHandle = TargetControl.GetRowHandleByVisibleIndex(i);
if (TargetControl.IsGroupRowHandle(rowHandle))
{
continue;
}
if (TargetControl.IsMasterRowExpanded(rowHandle))
{
TargetControl.CollapseMasterRow(rowHandle);
}
}
}
}