Plantuml for class diagram in [Quick reference Card](http://www.digilife.be/quickreferences/qrc/uml%20quick%20reference%20card.pdf)

class.markdown

quickcard.puml

@startuml
skinparam classAttributeIconSize 0

class EventQMgr{
  +post(e:Event)
  +suspend()
  -flush()
}
note right: Active Class

class Event {
}
note right: Class

EventQMgr *--> Event: Composition

abstract Window{
  +postEvent(Event)
  #<i>processEvent(Event)</i>
}

Event <-[dotted]- Window: Dependency

class Frame{
  +menuBar:MenuBar

  +setTitle(String)
  +remove(Menu)
  #paramString():String
  --
  Responsabilities:
  - Manage a MenuBar
  - Process events
}
note left: Class

Window <|-- Frame: Specialization

class MenuBar
MenuBar <-- Frame: Association

class MenuItem
MenuBar <|--> MenuItem: Aggregation

interface MenuContainer
MenuContainer <|-- Frame: Interface realization

@enduml