Sets whether the preview widget set by
gtk_file_chooser_set_preview_widget() should be shown for the
current filename. 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
gtk_file_chooser_set_preview_widget() for more details.
Sets whether the preview widget set by gtk_file_chooser_set_preview_widget() should be shown for the current filename. 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 gtk_file_chooser_set_preview_widget() for more details.