// Public methods
//
public T Add <T>(T element, bool addToUndoRedo) where T : IGraphElement
{
System.Action redo = () =>
{
if (element is IVertex v)
{
Execute.OnUIThread(() => ObservableVertices.Add(v));
}
else if (element is IEdge e)
{
Execute.OnUIThread(() => ObservableEdges.Add(e));
}
};
System.Action undo = () =>
{
Remove(element, false);
};
if (addToUndoRedo)
{
UndoRedoManager.Instance.AddAndExecute(new SimpleOperation(redo, undo));
}
else
{
redo();
}
return(element);
}
public IEdge AddEdge(IVertex source, IVertex target, bool isDirected, bool makeNotDirectedIfreversedExisted = false)
{
if (source == target)
{
return(null);
}
var existingEdge = ObservableEdges.FirstOrDefault(x => x.Source == source && x.Target == target);
if (existingEdge == null)
{
var reversedEdge = ObservableEdges.FirstOrDefault(x => x.Source == target && x.Target == source);
if (reversedEdge != null)
{
if (makeNotDirectedIfreversedExisted && reversedEdge.IsDirected)
{
reversedEdge.IsDirected = false;
return(reversedEdge);
}
return(reversedEdge);
}
var newEdge = new Edge(source, target, isDirected);
return(Add(newEdge, true));
}
return(null);
}
public void Remove(IGraphElement element, bool useUndoRedo = true)
{
if (element is IVertex)
{
var vertex = element as IVertex;
List <IEdge> edges = null;
System.Action redo = () =>
{
Execute.OnUIThread(() => ObservableVertices.Remove(vertex));
edges = ObservableEdges.Where(x => x.Source == vertex || x.Target == vertex)
.ToList();
edges.ForEach(x => ObservableEdges.Remove(x));
};
System.Action undo = () =>
{
AddVertex(vertex);
edges.ForEach(x => Add(x, false));
};
if (useUndoRedo)
{
UndoRedoManager.Instance.AddAndExecute(new SimpleOperation(redo, undo));
}
else
{
redo();
}
}
else if (element is IEdge)
{
var edge = element as IEdge;
System.Action redo = () =>
{
Execute.OnUIThread(() => ObservableEdges.Remove(edge));
};
System.Action undo = () =>
{
Add(edge, false);
};
if (useUndoRedo)
{
UndoRedoManager.Instance.AddAndExecute(new SimpleOperation(redo, undo));
}
else
{
redo();
}
}
}
public void Clear()
{
Execute.OnUIThread(() => ObservableEdges.Clear());
Execute.OnUIThread(() => ObservableVertices.Clear());
UndoRedoManager.Instance.Clear();
}