Model, View, Controller Design

MVC (Model/View/Controller) software design architecture was used in Visual Tagging Tool (VTT). The five main software components are described as below and shown in the following diagram:

• Model:
  Application objects implemented in Java
  • GlobalVars
  • Markup/Markups
  • Tag/Tags
  • VttText
  • VttDocument
  • Undo/UndoManager
• View:
  Screen presentation with GUI. Such as MenuBar, popupmenu, dialog, etc..
  • MainFrame
    • VttMenuBar
    • MainPanel
    • StatusPanel
    • VttPopupMenu
    • Dialogs
• Controller:
  Defines the way user interface reacts to user input.
  • VttMenuBarControl
  • VttPopupMenuControl
  • KeysControl
  • MouseControl
  • SelectControl

  • DialogControl
    • MarkupDialog
    • MarkupsDialog
    • TagsDialog
      • AddTagDialog
      • EditTagDialog
• GuiLib
  A collections of GUI called by view.
• Operations
  A collections of operations called by controller.
  • FileOperations
  • GuiOperations
  • HelpDocOperations
  • MarkupOperations
  • TextDisplayOperations
  • UndoOperations