How to add the another keyboard layout to the custom on-screen keyboard

[Denis Nikashin]

Hi there. I very hope on your help. I found an on-screen keyboard on javaFX. On the assignment, I need to add support for the Ukrainian language. Change the language I knotted on the button metaKey. The problem is that when you try to hang a listener on this button (toggleButton), because of the lambda-based handler, all the code breaks. I understand logically what needs to be added, but the functionality is not enough knowledge. Push me please in the desired direction. Thanks in advance.

Here is the actual code:
VirtualKeyboard

The Main.class
VirtualKeyExample

[Stephan van Hulst]

Welcome to CodeRanch!

Many users are reluctant to go off-site to check out code. Can you post the relevant snippets here? When you do, please surround the code in code tags like [code]this[/code].

[Knute Snortum]

In your github code, you have eliminated the import statements.  Please include them, as it makes the code much harder to read and can also change the meaning of the code.

So, to combine what Campbell and I said, post the entire code listing here, with import and package statements, and UseCodeTags (that's a link).

[Denis Nikashin]

Thanks for your advice, but I can't do it, because my post is very long. I can show link on GitHub repo with source code its I want to change. I'm so sorry.
link on GitHub repo with virtualKeyBoard

[Denis Nikashin]

Thanks for your advice, but I can't do it, because my post is very long. I can show link on GitHub repo with source code its I want to change. I'm so sorry.
link on GitHub repo with virtualKeyBoard

Also here is a link to my post on another forum, however it is Russian-speaking
link

[Knute Snortum]

Ok, I got your code to execute, but I don't know what the problem is.  In particular, what does this mean?

Change the language I knotted on the button metaKey. The problem is that when you try to hang a listener on this button (toggleButton), because of the lambda-based handler, all the code breaks.

Could you post the listener code that breaks all the code?

[Denis Nikashin]

Thank you for your answer, but I managed to find another solution. However, it does not completely solve the problem. I can change languages, but one language remains inactive. To achieve this, I changed the method of the ShiftaleButton (). I attached my new solution as a file to this message. Thanks.

public VirtualKeyboard(ReadOnlyObjectProperty<Node> target) {
    this.root = new VBox(5);
    root.setPadding(new Insets(30));
    root.getStyleClass().add("virtual-keyboard");

    final Modifiers modifiers = new Modifiers();

    // Data for regular buttons; split into rows
    final String[][] unshifted = new String[][]{
            {"`", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "="},
            {"q", "w", "e", "r", "t", "y", "u", "i", "o", "p", "[", "]", "\\"},
            {"a", "s", "d", "f", "g", "h", "j", "k", "l", ";", "'"},
            {"z", "x", "c", "v", "b", "n", "m", ",", ".", "/"}};

    final String[][] shifted = new String[][]{
            {"~", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "_", "+"},
            {"Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P", "{", "}", "|"},
            {"A", "S", "D", "F", "G", "H", "J", "K", "L", ":", "\""},
            {"Z", "X", "C", "V", "B", "N", "M", "<", ">", "?"}};

    final String[][] unshiftedRU = new String[][]{
            {"ё", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "="},
            {"й", "ц", "у", "к", "е", "н", "г", "ш", "щ", "з", "х", "ъ", "\\"},
            {"ф", "ы", "в", "а", "п", "р", "о", "л", "д", "ж", "э"},
            {"я", "ч", "с", "м", "и", "т", "ь", "б", "ю", "."}};

    final String[][] shiftedRU = new String[][]{
            {"Ё", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "="},
            {"Й", "Ц", "У", "К", "Е", "Н", "Г", "Ш", "Щ", "З", "Х", "Ъ", "\\"},
            {"Ф", "Ы", "В", "А", "П", "Р", "О", "Л", "Д", "Ж", "Э"},
            {"Я", "Ч", "С", "М", "И", "Т", "Ь", "Б", "Ю", ","}};

    final KeyCode[][] codes = new KeyCode[][]{
            {KeyCode.BACK_QUOTE, KeyCode.DIGIT1, KeyCode.DIGIT2, KeyCode.DIGIT3,
                    KeyCode.DIGIT4, KeyCode.DIGIT5, KeyCode.DIGIT6, KeyCode.DIGIT7,
                    KeyCode.DIGIT8, KeyCode.DIGIT9, KeyCode.DIGIT0, KeyCode.SUBTRACT,
                    KeyCode.EQUALS},
            {KeyCode.Q, KeyCode.W, KeyCode.E, KeyCode.R, KeyCode.T, KeyCode.Y,
                    KeyCode.U, KeyCode.I, KeyCode.O, KeyCode.P, KeyCode.OPEN_BRACKET,
                    KeyCode.CLOSE_BRACKET, KeyCode.BACK_SLASH},
            {KeyCode.A, KeyCode.S, KeyCode.D, KeyCode.F, KeyCode.G, KeyCode.H,
                    KeyCode.J, KeyCode.K, KeyCode.L, KeyCode.SEMICOLON, KeyCode.QUOTE},
            {KeyCode.Z, KeyCode.X, KeyCode.C, KeyCode.V, KeyCode.B, KeyCode.N,
                    KeyCode.M, KeyCode.COMMA, KeyCode.PERIOD, KeyCode.SLASH}};

    final Button escape = createNonshiftableButton("Esc", KeyCode.ESCAPE, modifiers, target);
    final Button backspace = createNonshiftableButton("Backspace", KeyCode.BACK_SPACE, modifiers, target);
    final Button delete = createNonshiftableButton("Del", KeyCode.DELETE, modifiers, target);
    final Button enter = createNonshiftableButton("Enter", KeyCode.ENTER, modifiers, target);
    final Button tab = createNonshiftableButton("Tab", KeyCode.TAB, modifiers, target);

    final Button cursorLeft = createCursorKey(KeyCode.LEFT, modifiers, target, 15.0, 5.0, 15.0, 15.0, 5.0, 10.0);
    final Button cursorRight = createCursorKey(KeyCode.RIGHT, modifiers, target, 5.0, 5.0, 5.0, 15.0, 15.0, 10.0);
    final Button cursorUp = createCursorKey(KeyCode.UP, modifiers, target, 10.0, 0.0, 15.0, 10.0, 5.0, 10.0);
    final Button cursorDown = createCursorKey(KeyCode.DOWN, modifiers, target, 10.0, 10.0, 15.0, 0.0, 5.0, 0.0);
    final VBox cursorUpDown = new VBox(2);
    cursorUpDown.getChildren().addAll(cursorUp, cursorDown);

    final Node[][] extraLeftButtons = new Node[][]{{escape}, {tab}, {modifiers.capsLockKey()}, {modifiers.shiftKey()}};
    final Node[][] extraRightButtons = new Node[][]{{backspace}, {delete}, {enter}, {modifiers.secondShiftKey()}};

    createRowKeyboard(target, modifiers, unshifted, shifted,
            unshiftedRU, shiftedRU, codes, extraLeftButtons, extraRightButtons);

    final Button spaceBar = createNonshiftableButton(" ", KeyCode.SPACE, modifiers, target);
    spaceBar.setMaxWidth(Double.POSITIVE_INFINITY);
    HBox.setHgrow(spaceBar, Priority.ALWAYS);

    final HBox bottomRow = new HBox(5);
    bottomRow.setAlignment(Pos.CENTER);
    bottomRow.getChildren().addAll(modifiers.ctrlKey(), modifiers.altKey(),
            modifiers.metaENGKey(), spaceBar, cursorLeft, cursorUpDown, cursorRight);
    root.getChildren().add(bottomRow);
  }

  /**
   *  creates rows for both languages on the keyboard
   * */
  private void createRowKeyboard(ReadOnlyObjectProperty<Node> target,
                                 Modifiers modifiers,
                                 String[][] unshifted,
                                 String[][] shifted,
                                 String[][] unshiftedRU,
                                 String[][] shiftedRU,
                                 KeyCode[][] codes, Node[][] extraLeftButtons, Node[][] extraRightButtons) {
    for (int row = 0; row < unshifted.length; row++) {
      HBox hbox = new HBox(5);
      hbox.setAlignment(Pos.CENTER);
      root.getChildren().add(hbox);

      hbox.getChildren().addAll(extraLeftButtons[row]);
      createColumnKeyboard(target, modifiers, unshifted[row], shifted[row],
              unshiftedRU[row], shiftedRU[row], codes[row], hbox);
      hbox.getChildren().addAll(extraRightButtons[row]);
    }
  }

  /**
   *  creates columns for both languages on the keyboard
   *  @param strings accepts unshifted String array
   *  @param strings1 accepts shifted String array
   *  @param strings2 accepts unshiftedRU String array
   *  @param strings3 accepts shiftedRU String array
   *
   * */
  private void createColumnKeyboard(ReadOnlyObjectProperty<Node> target, Modifiers modifiers,
                                    String[] strings, String[] strings1, String[] strings2,
                                    String[] strings3, KeyCode[] code, HBox hbox) {
    for (int k = 0; k < strings.length; k++) {
      hbox.getChildren().add(createShiftableButton(strings[k], strings1[k], strings2[k],
              strings3[k], code[k], modifiers, target));
    }
  }

  public VirtualKeyboard() {
    this(null);
  }

  public Node view() {
    return root;
  }

  /**
   * this method for switching languages on the keyboard
   * The "text" variable receives the result by pressing ToggleButton 'ENG'
   * */
  private Button createShiftableButton( String unshifted,  String shifted,
                                        String unshiftedRU, String shiftedRU,
                                        final KeyCode code, Modifiers modifiers,
                                        final ReadOnlyObjectProperty<Node> target) {

    final ReadOnlyBooleanProperty letter = new SimpleBooleanProperty(unshifted.length() == 1
            && Character.isLetter(unshifted.charAt(0)));

    ObservableStringValue text = Bindings.when(modifiers.metaENGDown())
            .then(Bindings.when(modifiers.shiftDown().or(modifiers.capsLockOn().and(letter)))
                    .then(shiftedRU)
                    .otherwise(unshiftedRU))

            .otherwise(Bindings.when(modifiers.shiftDown().or(modifiers.capsLockOn().and(letter)))
                    .then(shifted)
                    .otherwise(unshifted));


    return createButton( text, code, modifiers, target);
  }

  private Button createNonshiftableButton(final String text, final KeyCode code, final Modifiers modifiers,
                                          final ReadOnlyObjectProperty<Node> target) {
    StringProperty textProperty = new SimpleStringProperty(text);

    Button button = createButton(textProperty,  code, modifiers, target);
    return button;
  }

[Denis Nikashin]

O, I didn't manage to correctly issue my post, but the rest of the code has not changed.

[Knute Snortum]

Sorry, I can't tell if you still have issues or is it all good?