JavaFX Virtual keyboard

 Public classEffecttest extends Application {@Override Public voidStart (final stage stage) {Final Keyboard Keyboard=NewKeyboard (NewKey (KEYCODE.W),NewKey (KEYCODE.S),NewKey (keycode.a),NewKey (KEYCODE.D)); Final scene Scene=NewScene (NewGroup (Keyboard.createnode ()));        Stage.setscene (Scene); Stage.settitle ("Keyboard Example");    Stage.show (); }     Private StaticFinalclassKey {Privatefinal KeyCode KeyCode; Privatefinal Booleanproperty Pressedproperty;  PublicKey (Final keycode keycode) { This. keycode =KeyCode;  This. Pressedproperty =NewSimplebooleanproperty ( This,"pressed"); }         Publickeycode getKeyCode () {returnKeyCode; }         PublicBoolean ispressed () {returnPressedproperty.Get(); }         Public voidsetpressed (Final boolean value) {Pressedproperty.Set(value); }         PublicNode CreateNode () {final Stackpane Keynode=NewStackpane (); Keynode.setfocustraversable (true);            Installeventhandler (Keynode); Final Rectangle Keybackground=NewRectangle ( -, -); Keybackground.fillproperty (). Bind (Bindings.when (Pressedproperty). Then (Colo                                               r.red). Otherwise (Bindings.when (Keynode.focusedproperty ())            . then (Color.lightgray). otherwise (color.white));            Keybackground.setstroke (Color.Black); Keybackground.setstrokewidth (2); Keybackground.setarcwidth ( A); Keybackground.setarcheight ( A); Final Text Keylabel=NewText (Keycode.getname ()); Keylabel.setfont (Font.font ("Arial", Fontweight.bold, -));            Keynode.getchildren (). AddAll (Keybackground, Keylabel); returnKeynode; }        Private voidInstalleventhandler (Final Node keynode) {//handler for Enter key Press/release events, other keys is//handled by the parent (keyboard) node handlerFinal eventhandler<keyevent> Keyeventhandler =NewEventhandler<keyevent>() {                         Public voidhandle (Final KeyEvent keyevent) {if(Keyevent.getcode () = =keycode.enter) {setpressed (Keyevent.geteventtype () ==keyevent.key_pressed);                            Keyevent.consume ();            }                        }                    };            Keynode.setonkeypressed (Keyeventhandler);        Keynode.setonkeyreleased (Keyeventhandler); }    }    Private StaticFinalclassKeyboard {Privatefinal key[] keys;  PublicKeyboard (final Key ... keys) { This. Keys =Keys.clone (); }         PublicNode CreateNode () {final HBox Keyboardnode=NewHBox (6); Keyboardnode.setpadding (NewInsets (6)); Final List<Node> Keyboardnodechildren =Keyboardnode.getchildren ();  for(Final Key Key:keys) {Keyboardnodechildren.add (Key.createnode ());            } installeventhandler (Keyboardnode); returnKeyboardnode; }        Private voidInstalleventhandler (Final Parent keyboardnode) {//handler for key pressed/released events not handled by//Key NodesFinal eventhandler<keyevent> Keyeventhandler =NewEventhandler<keyevent>() {                         Public voidhandle (Final KeyEvent keyevent) {Final key key=LookupKey (Keyevent.getcode ()); if(Key! =NULL) {key.setpressed (Keyevent.geteventtype () ==keyevent.key_pressed);                            Keyevent.consume ();            }                        }                    };            Keyboardnode.setonkeypressed (Keyeventhandler);            Keyboardnode.setonkeyreleased (Keyeventhandler); Keyboardnode.addeventhandler (keyevent.key_pressed,NewEventhandler<keyevent>() {                                              Public voidhandle (Final KeyEvent keyevent) {                                                         Handlefocustraversal (Keyboardnode,                                             KeyEvent);        }                                         }); }        PrivateKey LookupKey (final keycode keycode) { for(Final Key key:keys) {if(Key.getkeycode () = =keycode) {                    returnkey; }            }            return NULL; }        Private Static voidhandlefocustraversal (Final Parent traversalgroup, final keyevent Keye            Vent) {final Node nextfocusednode; Switch(Keyevent.getcode ()) { CaseLeft:nextfocusednode=Getpreviousnode (Traversalgroup, (Node) keyevent                    . Gettarget ());                    Keyevent.consume ();  Break;  CaseRight:nextfocusednode=Getnextnode (Traversalgroup, (Node) Keyevent.gettarg                    ET ());                    Keyevent.consume ();  Break; default:                    return; }            if(Nextfocusednode! =NULL) {nextfocusednode.requestfocus (); }        }        Private StaticNode Getnextnode (final parent parent, final node node) {Final Iter Ator<Node> Childiterator =parent.getchildrenunmodifiable (). iterator ();  while(Childiterator.hasnext ()) {if(Childiterator.next () = =node) {                    returnChilditerator.hasnext ()?Childiterator.next ():NULL; }            }            return NULL; }        Private StaticNode Getpreviousnode (final parent parent, final node node) {fi NAL Iterator<Node> Childiterator =parent.getchildrenunmodifiable (). iterator (); Node Lastnode=NULL;  while(Childiterator.hasnext ()) {final Node CurrentNode=Childiterator.next (); if(CurrentNode = =node) {                    returnLastnode; } lastnode=CurrentNode; }            return NULL; }    }   }//  

JavaFX Virtual keyboard