public void OnEnable()
{
hideFlags = HideFlags.HideAndDontSave;
if (camera == null)
{
camera = new GraphCamera();
}
if (selectionBox == null)
{
selectionBox = new GraphSelectionBox();
selectionBox.SelectionPerformed += HandleBoxSelection;
}
if (keyboardState == null)
{
keyboardState = new KeyboardState();
}
if (cursorDragLink == null)
{
cursorDragLink = new CursorDragLink(this);
cursorDragLink.DraggedLinkReleased += HandleMouseDraggedLinkReleased;
}
if (contextMenu == null)
{
contextMenu = new GraphContextMenu();
contextMenu.RequestContextMenuCreation += OnRequestContextMenuCreation;
contextMenu.MenuItemClicked += OnMenuItemClicked;
}
RemoveGraphListeners();
AddGraphListeners();
InitializeNodeRenderers();
Undo.undoRedoPerformed += OnUndoRedoPerformed;
}