void setExampleWidgetSize () {
		int size = SWT.DEFAULT;
		if (preferredButton == null) return;
		if (preferredButton.getSelection()) size = SWT.DEFAULT;
		if (tooSmallButton.getSelection()) size = TOO_SMALL_SIZE;
		if (smallButton.getSelection()) size = SMALL_SIZE;
		if (largeButton.getSelection()) size = LARGE_SIZE;
		Control [] controls = getExampleControls ();
		for (int i=0; i<controls.length; i++) {
			GridData gridData = new GridData(size, size); 
			gridData.grabExcessHorizontalSpace = fillHButton.getSelection();
			gridData.grabExcessVerticalSpace = fillVButton.getSelection();
			gridData.horizontalAlignment = fillHButton.getSelection() ? SWT.FILL : SWT.LEFT;
			gridData.verticalAlignment = fillVButton.getSelection() ? SWT.FILL : SWT.TOP;
			controls [i].setLayoutData (gridData);
		}
		tabFolderPage.layout (controls);
	}