internal UIElement GetWrapper()
{
HeaderFooterItem headerFooterItem = m_owner as HeaderFooterItem;
if (headerFooterItem == null)
{
headerFooterItem =
m_dataGridContext.GetContainerFromItem(m_owner) as HeaderFooterItem;
}
if (headerFooterItem == null)
{
return(null);
}
IDataGridItemContainer dataGridItemContainer = HeaderFooterItem.FindIDataGridItemContainerInChildren(
headerFooterItem, headerFooterItem.AsVisual());
if (dataGridItemContainer != null)
{
return(dataGridItemContainer as UIElement);
}
return(headerFooterItem);
}
private static Func<DependencyObject, bool> GetTemplatedDescendantExpandPredicate( IDataGridItemContainer source )
{
var fe = source as FrameworkElement;
if( fe == null )
throw new ArgumentException( "The source object must be a FrameworkElement.", "source" );
return ( DependencyObject item ) => IDataGridItemContainerExtensions.IsPartOfTargetTemplate( item, fe );
}
internal static IDataGridItemContainer FindIDataGridItemContainerInChildren(HeaderFooterItem headerFooterItem, DependencyObject currentChild, bool checkRoot)
{
if (currentChild == null)
{
return(null);
}
IDataGridItemContainer container = currentChild as IDataGridItemContainer;
if (checkRoot)
{
if (container != null)
{
return(container);
}
}
int childCount = VisualTreeHelper.GetChildrenCount(currentChild);
for (int i = 0; i < childCount; i++)
{
DependencyObject child = VisualTreeHelper.GetChild(currentChild, i);
if (child == null)
{
continue;
}
if (!HeaderFooterItem.IsPartOfHeaderFooterItemTemplate(child, headerFooterItem))
{
// We don't want to parse further the DataTemplate
return(null);
}
container = child as IDataGridItemContainer;
if (container != null)
{
return(container);
}
int innerChildCount = VisualTreeHelper.GetChildrenCount(child);
if (innerChildCount > 0)
{
container = HeaderFooterItem.FindIDataGridItemContainerInChildren(headerFooterItem, child, false);
}
if (container != null)
{
return(container);
}
}
return(null);
}
internal DataGridItemContainerManager( IDataGridItemContainer owner )
{
if( owner == null )
throw new ArgumentNullException( "owner" );
if( !( owner is FrameworkElement ) )
throw new ArgumentException( "The owner must derive from FrameworkElement.", "owner" );
m_owner = owner;
}
private static IEnumerable<IDataGridItemContainer> GetChildDataGridItemContainers( IDataGridItemContainer source, Func<DependencyObject, bool> expand )
{
Debug.Assert( source != null );
var root = source as DependencyObject;
if( root == null )
throw new ArgumentException( "The source object must be a DependencyObject.", "source" );
return IDataGridItemContainerExtensions.GetChildDataGridItemContainers( root, expand );
}
internal DataGridItemContainerManager(IDataGridItemContainer owner)
{
if (owner == null)
{
throw new ArgumentNullException("owner");
}
if (!(owner is FrameworkElement))
{
throw new ArgumentException("The owner must derive from FrameworkElement.", "owner");
}
m_owner = owner;
}
private static Func <DependencyObject, bool> GetTemplatedChildExpandPredicate(IDataGridItemContainer source)
{
var fe = source as FrameworkElement;
if (fe == null)
{
throw new ArgumentException("The source object must be a FrameworkElement.", "source");
}
return(( DependencyObject item ) => IDataGridItemContainerExtensions.ExpandChild(item) &&
IDataGridItemContainerExtensions.IsPartOfTargetTemplate(item, fe));
}
private static IEnumerable <IDataGridItemContainer> GetChildDataGridItemContainers(IDataGridItemContainer source, Func <DependencyObject, bool> expand)
{
Debug.Assert(source != null);
var root = source as DependencyObject;
if (root == null)
{
throw new ArgumentException("The source object must be a DependencyObject.", "source");
}
return(IDataGridItemContainerExtensions.GetChildDataGridItemContainers(root, expand));
}
internal static IEnumerable <IDataGridItemContainer> GetTemplatedChildDataGridItemContainers(this IDataGridItemContainer source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
var predicate = IDataGridItemContainerExtensions.GetTemplatedChildExpandPredicate(source);
return(IDataGridItemContainerExtensions.GetChildDataGridItemContainers(source, predicate));
}
