deleteBackground

Type

message

Summary

Sent to a group just before it is removed from the stack.

Syntax

deleteBackground

Description

Handle the deleteBackground message if you want to perform cleanup before a group is removed from the stack.

The actual deletion is not triggered by the deleteBackground message, so trapping the message and not allowing it to pass does not prevent the group from being removed.

Deleting the last card on which a group appears does not remove the group from the stack, so it does not cause a deleteBackground message to be sent.

Ungrouping a group does not cause a deleteBackground message to be sent.

A deleteGroup message is sent before the deleteBackground message. (The deleteBackground message is included for compatibility with HyperCard.)

Examples

on deleteBackground
  beep 2 -- warn user
  pass deleteBackground
end deleteBackground

Related

glossary: message, trap

object: stack

command: delete, group

control structure: pass

Compatibility and Support

Introduced

LiveCode 1.0

OS

mac

windows

linux

ios

android

Platforms

desktop

server

mobile