Properties
Protected _classname
_classname: string = ""
Protected _content
_content: string = ""
Protected _disabled
_disabled: boolean = false
Protected _dockable
_dockable: boolean = false
Protected _draggable
_draggable: boolean = true
Protected _positionStr
_positionStr: string = null
Static defaultMaxListeners
defaultMaxListeners: number
ContextCtrl ContextCtrl control the show/hide of context when node or background be right click