private static TreeViewItem GetTreeViewItemFromGroupLevelDescriptionCollection( TreeViewItem rootItem, GroupLevelDescriptionCollection groupLevelDescriptions )
{
TreeViewItem returned = null;
Debug.Assert( rootItem != null );
Debug.Assert( groupLevelDescriptions != null );
if( rootItem == null )
throw new DataGridInternalException( "rootItem is null." );
foreach( object item in rootItem.Items )
{
TreeViewItem child = rootItem.ItemContainerGenerator.ContainerFromItem( item ) as TreeViewItem;
// It may not be visible
if( child == null )
continue;
DetailConfiguration detailConfiguration = child.Header as DetailConfiguration;
if( detailConfiguration == null )
throw new DataGridInternalException( "The item's DataContext must be a DetailConfiguration except for the top-most HierarchicalGroupByControl, which contains a DataGridContext." );
if( groupLevelDescriptions == detailConfiguration.GroupLevelDescriptions )
{
returned = child;
break;
}
returned = HierarchicalGroupByControl.GetTreeViewItemFromGroupLevelDescriptionCollection( child, groupLevelDescriptions );
if( returned != null )
break;
}
return returned;
}
internal void SetGroupLevelDescriptions( GroupLevelDescriptionCollection value )
{
this.SetValue( DetailConfiguration.GroupLevelDescriptionsPropertyKey, value );
}
private static bool IsGroupLevelDescriptionsInDetailConfigurations( DetailConfigurationCollection configurations, GroupLevelDescriptionCollection groupLevelDescriptions )
{
bool returnValue = false;
int detailConfigurationCount = configurations.Count;
for( int i = 0; i < detailConfigurationCount; i++ )
{
DetailConfiguration detailConfiguration = configurations[ i ];
if( detailConfiguration.DetailConfigurations != null )
returnValue = GroupingHelper.IsGroupLevelDescriptionsInDetailConfigurations( detailConfiguration.DetailConfigurations, groupLevelDescriptions );
if( returnValue )
break;
returnValue = ( detailConfiguration.GroupLevelDescriptions == groupLevelDescriptions );
if( returnValue )
break;
}
return returnValue;
}
