public bool Remove(Shape s)
{
if (s is RelationshipShape)
{
s.RaiseOnDelete();
G.RelationshipShapes.Remove(s);
return true;
}
else if (s is BlockShape)
{
ArrayList toRemove = new ArrayList(); // needed because we can't remove during iteration
foreach (RelationshipShape r in G.RelationshipShapes)
if(r.StartObject==s||r.EndObject==s)
toRemove.Add(r);
foreach (RelationshipShape r in toRemove)
Remove(r);
s.RaiseOnDelete();
G.BlockShapes.Remove(s);
return true;
}
else
return false;
}
public bool Add(Shape s)
{
if (s is RelationshipShape)
{
G.RelationshipShapes.Add(s);
return true;
}
else if (s is BlockShape)
{
G.BlockShapes.Add(s);
return true;
}
else
return false;
}