private bool HandleTogglePreview(GraphCommand command)
{
uint bubbleId = (uint)command.GetArgument(0);
if (bubbleId == uint.MaxValue)
{
return(ToggleAllPreviews());
}
PreviewBubble previewBubble = bubbleCollection[bubbleId] as PreviewBubble;
if (previewBubble == null)
{
return(false);
}
VisualNode node = GetVisualNode(previewBubble.OwnerId);
if (node == null)
{
return(false);
}
List <IVisualNode> nodeList = new List <IVisualNode>();
nodeList.Add(node);
undoRedoRecorder.BeginGroup();
undoRedoRecorder.RecordNodeModificationForUndo(nodeList);
undoRedoRecorder.EndGroup();
if (node.NodeStates.HasFlag(States.PreviewHidden))
{
node.ClearState(States.PreviewHidden);
CurrentSynchronizer.BeginQueryNodeValue(node.NodeId);
}
else
{
node.SetNodeState(States.PreviewHidden);
}
previewBubble.Collapse(node.NodeStates.HasFlag(States.PreviewHidden));
return(true);
}