Gets whether the preview widget set by gtk_file_chooser_set_preview_widget() should be shown for the current filename. See gtk_file_chooser_set_preview_widget_active().
TRUE if the preview widget is active for the current filename.
2.4
Gets whether the preview widget set by gtk_file_chooser_set_preview_widget() should be shown for the current filename. See gtk_file_chooser_set_preview_widget_active().