public override void UndoImpl()
{
var draggedNode = Tree.Nodes[0].SelectNode(DraggedBranch.VPath);
draggedNode.Text = OldName;
DraggedBranch.Delete();
DraggedBranch.Rename(OldName);
OldParent.AttachBranch(DraggedBranch);
var oldParentNode = Tree.Nodes[0].SelectNode(OldParent.VPath);
draggedNode.Remove();
oldParentNode.Nodes.Add(draggedNode);
Tree.SelectedNode = draggedNode;
}
IDictionary <StructureChangedEventArgs <TNode>, IEnumerable <TNode> > strChangeRange()
{
var nr = _self.Upstream().Last();
Dictionary <StructureChangedEventArgs <TNode>, IEnumerable <TNode> > dic = new Dictionary <StructureChangedEventArgs <TNode>, IEnumerable <TNode> >();
var dArg = new StructureChangedEventArgs <TNode>(TreeNodeChangedAction.Deviate, _self, OldParent, oldIndex);
var jArg = new StructureChangedEventArgs <TNode>(TreeNodeChangedAction.Join, _self, OldParent, oldIndex);
if (object.Equals(PreOldRoot, nr))
{
var mArg = new StructureChangedEventArgs <TNode>(TreeNodeChangedAction.Move, _self, OldParent, oldIndex);
if (NewParent != null && OldParent != null && OldParent.Root() != PreOldRoot)
{
dic.Add(dArg, OldParent.Root().Levelorder()); //remove
}
dic.Add(mArg, nr.Levelorder()); //move
}
else
{
//add or remove
if (OldParent != null)
{
dic.Add(dArg, OldParent.Root().Levelorder());
}
if (NewParent != null)
{
dic.Add(jArg, NewParent.Root().Levelorder());
}
else
{
IEnumerable <TNode> v;
if (dic.TryGetValue(dArg, out v))
{
dic[dArg] = v.Union(_self.Levelorder());
}
else
{
dic.Add(dArg, _self.Levelorder());
}
}
}
return(dic);
}
IDictionary <ChangedDescendantInfo <TNode>, IEnumerable <TNode> > desChangedRange()
{
//祖先宛の子孫変更通知
//同一ツリー内での移動
var dic = new Dictionary <ChangedDescendantInfo <TNode>, IEnumerable <TNode> >();
var dArg = new ChangedDescendantInfo <TNode>(TreeNodeChangedAction.Deviate, _self, OldParent, oldIndex);
var jArg = new ChangedDescendantInfo <TNode>(TreeNodeChangedAction.Join, _self, OldParent, oldIndex);
if (object.Equals(PreOldRoot, _self.Upstream().Last()))
{
var mArg = new ChangedDescendantInfo <TNode>(TreeNodeChangedAction.Move, _self, OldParent, oldIndex);
var deviate = preOldAnc.Except(_self.Upstream().Skip(1));
var join = _self.Upstream().Skip(1).Except(preOldAnc);
var move = preOldAnc.Intersect(_self.Upstream().Skip(1));
if (deviate.Any())
{
dic.Add(dArg, deviate);
}
if (join.Any())
{
dic.Add(jArg, join);
}
if (move.Any())
{
dic.Add(mArg, move);
}
}
else
{
if (OldParent != null)
{
dic.Add(dArg, OldParent.Upstream());
}
if (NewParent != null)
{
dic.Add(jArg, NewParent.Upstream());
}
}
return(dic);
}
protected internal override void Undo()
{
NewParent.InternalReplaceItemRange(NewIndex, 1, new PlaylistItem[] { });
OldParent.InternalReplaceItemRange(OldIndex, 0, new PlaylistItem[] { Item });
}