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32 lines (19 loc) · 956 Bytes
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Name: deleteButton
Type: message
Syntax: deleteButton
Summary: Sent to a <button> just before it is removed from the <stack>.
Associations: button
Introduced: 1.0
OS: mac,windows,linux,ios,android
Platforms: desktop,server,web,mobile
Example:
on deleteButton -- prevent the deletion by immediately undoing it
beep
send "undo" to this card in 5 milliseconds
end deleteButton
Description:
Handle the <deleteButton> message if you want to perform cleanup before a <button> is removed from the <stack>.
The actual deletion is not triggered by the <deleteButton> <message>, so <trap|trapping> the <message> and not allowing it to <pass> does not prevent the <button> from being removed.
However, the undo <command> will restore a <button> after it is deleted by the user.
References: button (keyword), delete (command), stack (object), trap (glossary), button (glossary), message (glossary), command (glossary), pass (control_st)
Tags: objects