undoChanged

Type

message

Summary

Sent to the current card when the Undo action changes.

Syntax

undoChanged

Description

Handle the undoChanged message if you want to intercept the "Undo" menu item, providing your own Undo stack.

Undoable actions include painting actions, deletion of objects, moving of controls, and editing actions in a field. When the user performs one of these actions, thus changing what happens as a result of choosing Edit → Undo from the menubar, LiveCode sends the undoChanged message to the current card.

Examples

on undoChanged
  global lastFieldState
  put field "Edit" into lastFieldState
end undoChanged

Related

command: undo

glossary: current card, message

Compatibility and Support

Introduced

LiveCode 1.0

OS

mac

windows

linux

Platforms

desktop