public abstract class PseudoClass
extends Object 

PseudoClass represents one unique pseudo-class state. Introducing a pseudo-class into a JavaFX class only requires that the method Node.pseudoClassStateChanged(javafx.css.PseudoClass, boolean) be called when the pseudo-class state changes. Typically, the pseudoClassStateChanged method is called from the protected void invalidated() method of one of the property base classes in the javafx.beans.property package.

Note that if a node has a default pseudo-class state, a horizontal orientation for example, pseudoClassStateChanged should be called from the constructor to set the initial state.

The following example would allow "xyzzy" to be used as a pseudo-class in a CSS selector.

 public boolean isMagic() {
 return magic.get();
 }
 public BooleanProperty magicProperty() {
 return magic;
 }
 public BooleanProperty magic =
 new BooleanPropertyBase(false) {
 @Override protected void invalidated() {
 pseudoClassStateChanged(MAGIC_PSEUDO_CLASS. get());
 }
 @Override public Object getBean() {
 return MyControl.this;
 }
 @Override public String getName() {
 return "magic";
 }
 }
 private static final PseudoClass
 MAGIC_PSEUDO_CLASS = PseudoClass.getPseudoClass("xyzzy");