void computeDisplayTexts (GC gc) {
	if ((parent.getStyle () & SWT.VIRTUAL) != 0 && !cached) return;	/* nothing to do */

	int columnCount = parent.columns.length;
	if (columnCount == 0) return;

	for (int i = 0; i < columnCount; i++) {
		gc.setFont (getFont (i, false));
		computeDisplayText (i, gc);
	}
}