/// <summary>
/// Gets all <see cref="Unit">Units</see> along the hierarchy or the current unit if it is a leaf in the hierarchy.
/// </summary>
/// <param name="unit">The <see cref="UnitBase" /> to start with.</param>
/// <returns>All <see cref="Unit">Units</see> that were found along the hierarchy.</returns>
public static IEnumerable <IUnitDecorator> GetUnitsAlongHierarchy(IUnitDecorator unit)
{
IEnumerable <IUnitDecorator> result;
if (unit is UnitDecorator ||
(unit is MultiSelectionUnitDecorator && !((MultiSelectionUnitDecorator)unit).DecoratesHigherUnit))
{
result = LinqExtensions.FromSingle(unit);
}
else if (unit is HigherUnitDecorator)
{
result =
((HigherUnitDecorator)unit).Subordinates.Cast <IUnitDecorator>().SelectMany(GetUnitsAlongHierarchy);
}
else if (unit is MultiSelectionUnitDecorator)
{
result = ((MultiSelectionUnitDecorator)unit).Subordinates.SelectMany(GetUnitsAlongHierarchy);
}
else
{
result = Enumerable.Empty <UnitDecorator>();
}
return(result);
}
private static bool HasUnitTypeChanged(IUnitDecorator oldUnit, IUnitDecorator newUnit)
{
bool hasUnitTypeChanged = (oldUnit is UnitDecorator) ^ (newUnit is UnitDecorator);
bool isOneUnitNull = (oldUnit == null) ^ (newUnit == null);
return(hasUnitTypeChanged || isOneUnitNull);
}
/// <summary>
/// Gets all <see cref="Unit">Units</see> along the hierarchy or the current unit if it is a leaf in the hierarchy.
/// </summary>
/// <param name="unit">The <see cref="UnitBase" /> to start with.</param>
/// <returns>All <see cref="Unit">Units</see> that were found along the hierarchy.</returns>
public static IEnumerable<IUnitDecorator> GetUnitsAlongHierarchy(IUnitDecorator unit)
{
IEnumerable<IUnitDecorator> result;
if (unit is UnitDecorator ||
(unit is MultiSelectionUnitDecorator && !((MultiSelectionUnitDecorator)unit).DecoratesHigherUnit))
{
result = LinqExtensions.FromSingle(unit);
}
else if (unit is HigherUnitDecorator)
{
result =
((HigherUnitDecorator)unit).Subordinates.Cast<IUnitDecorator>().SelectMany(GetUnitsAlongHierarchy);
}
else if (unit is MultiSelectionUnitDecorator)
{
result = ((MultiSelectionUnitDecorator)unit).Subordinates.SelectMany(GetUnitsAlongHierarchy);
}
else
{
result = Enumerable.Empty<UnitDecorator>();
}
return result;
}
/// <summary>
/// Adds a unit.
/// </summary>
public void AddUnit()
{
IUnitDecorator newUnit = RootUnit.AddNewUnit();
SelectedUnit = newUnit;
ActivateItem(Items.FirstOrDefault());
OnModelChanged();
}
/// <summary>
/// Adds a hierarchy level.
/// </summary>
public void AddHierarchyLevel()
{
IUnitDecorator newHierarchyLevel = RootUnit.AddNewHigherUnit();
SelectedUnit = newHierarchyLevel;
ActivateItem(Items.FirstOrDefault());
OnModelChanged();
}
/// <summary>
/// Moves a unit to a new location within the hierarchy.
/// </summary>
/// <param name="unit">The moved unit.</param>
/// <param name="target">The new suprtior of the unit.</param>
public void MoveUnitInHierarchy(IUnitDecorator unit, HigherUnitDecorator target)
{
if (unit.Superior != null)
{
if (unit.Superior == target)
{
return;
}
unit.Superior.RemoveSubordinate((UnitBase)unit);
}
target.AddSubordinate((UnitBase)unit);
SelectedUnit = unit;
RootUnit.Subordinates.Refresh();
OnModelChanged();
}
private void DropTreeDrop(object sender, DragEventArgs e)
{
Contract.Requires(e.Data != null);
IUnitDecorator droppedUnitDecorator = null;
if (e.Data.GetDataPresent(typeof(UnitDecorator)))
{
droppedUnitDecorator = e.Data.GetData(typeof(UnitDecorator)) as UnitDecorator;
}
else if (e.Data.GetDataPresent(typeof(HigherUnitDecorator)))
{
droppedUnitDecorator = e.Data.GetData(typeof(HigherUnitDecorator)) as HigherUnitDecorator;
}
if (droppedUnitDecorator != null)
{
var treeViewItem = FindAnchestor <TreeViewItem>((DependencyObject)e.OriginalSource);
HigherUnitDecorator dropTarget = ViewModel.RootUnit;
if (treeViewItem != null)
{
dropTarget = treeViewItem.Header as HigherUnitDecorator;
if (dropTarget == null)
{
return;
}
}
Contract.Assume(dropTarget != null);
if (droppedUnitDecorator == dropTarget)
{
return;
}
ViewModel.MoveUnitInHierarchy(droppedUnitDecorator, dropTarget);
}
}
private void OnDossierChanged()
{
SelectedUnit = Dossier.RootUnit.Subordinates.Cast <IUnitDecorator>().FirstOrDefault();
}
