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Allegro CL version 8.2
This page is new in 8.2.


Arguments: list-view

This property has an effect only on the Windows platform, where it is provided by the underlying Microsoft control.

Returns the value of the on-check property of a list-view control. The value may be set at creation time by passing the :on-check initarg to make-instance, or any time later by calling (setf on-check).

The value of this event-handler property should be a function or the name of a function or nil. The default is nil. When the value is a function or function name and the show-check-boxes property of the list-view is true, then the function will be called whenever the state of one of the list-view's check boxes has changed. This includes when the user interactively toggles a check box by clicking on it, as well as when the application programmatically changes the state of a check-box by calling (setf checked). The function should accept three arguments, which will be the list-view widget, the list-view-item that was modified, and t or nil to indicate whether the item was checked or unchecked respectively.

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This page is new in the 8.2 release.
Created 2016.6.21.

Allegro CL version 8.2
This page is new in 8.2.