preOpenControl

Type

message

Summary

Sent to a group when you go to the card that contains it and to a background group when going from a card which it is not placed on to one where it is.

Syntax

preOpenControl

Description

Handle the preOpenControl message to update a group's appearance before it appears on screen.

For groups with their backgroundBehavior property set to true, the preOpenControl message is sent immediately after the preOpenBackground message is sent to the card being opened. For non-background groups, it is sent after the preOpenCard message.

For nested groups, the preOpenControl message is sent to the parent group first, if it is passed or not handled by the parent group, then it passes through each child group in reverse layer order (i.e from highest to lowest).

The actual navigation is not triggered by the preOpenControl message, so blocking the message and not allowing it to pass does not prevent the card with the group from opening.

Examples

on preOpenControl
  resizeMyObjects
  put empty into field "Customer Address" of me
end preOpenControl

Related

object: card, group

property: backgroundBehavior

command: dispatch

glossary: message, property

keyword: card

message: preOpenBackground, openControl, preOpenCard

Compatibility and Support

Introduced

LiveCode 3.5

OS

mac

windows

linux

ios

android

Platforms

desktop

server

mobile