internal void OnQueryGroups(QueryGroupsEventArgs e)
{
if (this.QueryGroups != null)
{
this.QueryGroups(this, e);
}
}
internal List <GroupNameCountPair> OnQueryGroups(DataGridVirtualizingCollectionViewGroup parentGroup)
{
ObservableCollection <GroupDescription> groupDescriptions = this.GroupDescriptions;
int nextLevel = parentGroup.Level + 1;
Debug.Assert((groupDescriptions != null) && (groupDescriptions.Count > nextLevel));
QueryGroupsEventArgs e = new QueryGroupsEventArgs(this, parentGroup, groupDescriptions[nextLevel]);
if (this.QueryGroups != null)
{
this.QueryGroups(this, e);
}
DataGridVirtualizingCollectionViewSource source = this.ParentCollectionViewSourceBase as DataGridVirtualizingCollectionViewSource;
if (source != null)
{
source.OnQueryGroups(e);
}
return(e.ChildGroupNameCountPairs);
}
