Using Gadgets from within Oberon

• Objective
• How to control gadgets with commands
  • Where to obtain information on the environment
    • Gadgets.context
    • Gadgets.executorObj
    • Gadgets.senderObj
    • Gadgets.receiverObj
  • Alternative environment information sources
    • Oberon.Par.obj
    • Oberon.Par.frame
    • Objects.NewObj
• How to control gadgets with messages
  • Accessing gadgets - Display.SelectMsg
  • Removing gadgets - Display.ControlMsg
  • Resizing / Moving a gadget - Display.ModifyMsg
  • Locating a frame - Display.LocateMsg
  • (Re)drawing a gadget - Display.DisplayMsg
  • Attribute management - Objects.AttrMsg
    • Retrieving an attribute
    • Setting an attribute
    • Enumerating the attributes
• How to control gadgets with procedures
  • Creating an object - CreateObject
  • Inserting a gadget at the caret location - Integrate
  • Creating a view/model pair - CreateViewModel
  • Naming an object - NameObj
  • Retrieving an object's name - GetObjName
  • Retrieving a public object - FindPublicObj
  • Retrieving an object - FindObj
  • Updating a gadget - Update
  • Retrieving a frame - ThisFrame
  • Executing a command - Execute
  • Executing a command - ExecuteAttr
  • Changing a gadget value directly - SetValue
  • Comparison between commands and procedures
• How to control documents
  • Loading an existing document - Documents.Open
  • Presenting a document - Desktops.ShowDoc
  • Creating a new document
  • Initializing a document - Documents.Init
  • Overview of commands and procedures
• A final example
• What's next?