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| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version

## without-on-change

Arguments: ( &rest widgets) &body body

This macro is useful for suppressing the usual running of the on-change code of one or more widgets while a body of application code is executed.

Evaluates body while the value of the on-change event handler property for each dialog-item in widgets is temporarily set to `nil`. Returns whatever the last form in body returns.

The original value of each on-change event handler is restored when body completes. An unwind-protect ensures this restoration in case of a break or a throw in body.

Each value in the widgets list should be an expression that evaluates to either a dialog-item instance or to `nil`. When `nil`, nothing is done for that member of the list.

### Examples of the calling format

    (without-on-change (widget1)
      (do-something)
      (do-something-else))

    (without-on-change ((find-component :widget1 my-dialog))
      (do-something))

    (without-on-change (widget1 widget2
                        (find-component :widget3 my-dialog)
                        (find-component :widget4 my-dialog))
      (do-something))

Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.2 page.
Created 2012.5.30.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version