SandBox

---
  config:
    class:
      hideEmptyMembersBox: true
---
classDiagram
class Command{
   presenter
   execute()
   unexecute()
}

class RotateCommand{
   degrees
   degrees:()
   rotateBy:()
}
class ZoomOutCommand {
   cacheForm
}

class CommandStack~ReadWriteStream~
class CommandManager {
   stack
   presenter
   undo()
   redo()
   rotateLeft()
   rotateRight()
   flipHorizontally()
   flipVertically()
   zoomIn()
   zoomOut()
}

Command <|-- FlipHCommand
Command <|-- FlipVCommand
Command <|-- RotateCommand
Command <|-- ZoomInCommand
Command <|-- ZoomOutCommand

CommandStack --> "0..n" Command
CommandManager --> "1" CommandStack

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