styleBuilder.literalExpression(haloWidthScale.getSelection()));
textSymbolizer.getHalo().getFill().setOpacity(
styleBuilder.literalExpression(
haloOpacityScale.getSelection()/opacityMaxValueFloat));
} else {
HaloImpl halo = new HaloImpl();
textSymbolizer.setHalo(halo);
textSymbolizer.getHalo().setFill(
styleBuilder.createFill(new Color(haloColor.red, haloColor.green,
haloColor.blue)));
textSymbolizer.getHalo().setRadius(