parent.relayout ();
if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { parent.layoutItems (0, true); }
public void setControl (Control control) {	checkWidget ();	if (control != null) {		if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);		if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT);	}	if (this.control == control) return;	this.control = control;	if (control != null) {		control.setVisible (OS.gtk_expander_get_expanded (handle));	}	parent.relayout ();}