Package javafx.css

Class PseudoClass


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 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");
JavaFX 8.0
  • Constructor Details

    • PseudoClass

      public PseudoClass()
      Constructor for subclasses to call.
  • Method Details

    • getPseudoClass

      public static PseudoClass getPseudoClass​(String pseudoClass)
      There is only one PseudoClass instance for a given pseudoClass.
      pseudoClass - the pseudo-class
      The PseudoClass for the given pseudoClass. Will not return null.
      IllegalArgumentException - if pseudoClass parameter is null or an empty String
    • getPseudoClassName

      public abstract String getPseudoClassName()
      the pseudo-class state