/**
* Updates this context according to the given style. Moreover given Graphics is updated to this
* style and used for taking the font metrics.
*
* @param style the style data to be used
* @param g Graphics to be updated and used
*/
public void updateForGraphics(NodeData style, Graphics2D g) {
if (style != null) update(style);
updateGraphics(g);
fm = g.getFontMetrics();
// update the width units
// em has been updated in update()
FontRenderContext frc = new FontRenderContext(null, false, false);
TextLayout layout = new TextLayout("x", font, frc);
ex = layout.getBounds().getHeight();
ch = fm.charWidth('0');
}
