gtk:file-chooser-preview-widget-active (object)

object -- a gtk:file-chooser widget
active -- a boolean whether to display the user-specified preview widget

Accessor of the preview-widget-active slot of the gtk:file-chooser interface. The gtk:file-chooser-preview-widget-active function gets whether the preview widget should be shown for the current filename. The (setf gtk:file-chooser-preview-widget-active) function sets whether the preview widget should be shown.

When active is set to false, the file chooser may display an internally generated preview of the current file or it may display no preview at all. See the gtk:file-chooser-preview-widget function for more details.