private static bool MoveColumnUnder(ColumnHierarchyManager columnsLayout, ColumnCollection columns, ColumnBase current, ColumnBase parent)
{
Debug.Assert(columnsLayout != null);
var currentLocation = columnsLayout.GetColumnLocationFor(current);
if (currentLocation == null)
{
return(false);
}
var pivotLocation = default(ColumnHierarchyManager.ILocation);
// Move the column under the orphan section.
if (parent == null)
{
var columnCollection = current.ContainingCollection;
if (columnCollection == null)
{
return(false);
}
var mergedColumnCollection = default(ColumnCollection);
if (columnCollection == columns)
{
mergedColumnCollection = null;
}
if (mergedColumnCollection == null)
{
return(false);
}
var levelMarkers = columnsLayout.GetLevelMarkersFor(mergedColumnCollection);
if (levelMarkers == null)
{
return(false);
}
pivotLocation = levelMarkers.Orphan;
}
else
{
pivotLocation = columnsLayout.GetColumnLocationFor(parent);
}
if (pivotLocation == null)
{
return(false);
}
if (!currentLocation.CanMoveUnder(pivotLocation))
{
return(false);
}
currentLocation.MoveUnder(pivotLocation);
return(true);
}
private static bool MoveColumnBefore(ColumnHierarchyManager columnsLayout, ColumnBase current, ColumnBase next)
{
Debug.Assert(columnsLayout != null);
var currentLocation = columnsLayout.GetColumnLocationFor(current);
if (currentLocation == null)
{
return(false);
}
var pivotLocation = columnsLayout.GetColumnLocationFor(next);
if (pivotLocation == null)
{
return(false);
}
if (!currentLocation.CanMoveBefore(pivotLocation))
{
return(false);
}
currentLocation.MoveBefore(pivotLocation);
return(true);
}
internal static void RemoveListener(ColumnHierarchyManager source, IWeakEventListener listener)
{
ColumnsLayoutChangingEventManager.CurrentManager.ProtectedRemoveListener(source, listener);
}