private void listen() {
   this.prefHeightProperty()
       .addListener(
           (bservable, oldValue, newValue) -> {
             textField.setPrefHeight(newValue.doubleValue());
           });
   this.prefWidthProperty()
       .addListener(
           (bservable, oldValue, newValue) -> {
             textField.setPrefWidth(newValue.doubleValue());
           });
   this.minHeightProperty()
       .addListener(
           (bservable, oldValue, newValue) -> {
             textField.setMinHeight(newValue.doubleValue());
           });
   this.maxHeightProperty()
       .addListener(
           (bservable, oldValue, newValue) -> {
             textField.setMaxHeight(newValue.doubleValue());
           });
   this.minWidthProperty()
       .addListener(
           (bservable, oldValue, newValue) -> {
             textField.setMinWidth(newValue.doubleValue());
           });
   this.maxWidthProperty()
       .addListener(
           (bservable, oldValue, newValue) -> {
             textField.setMaxWidth(newValue.doubleValue());
           });
 }
  public void start(Stage primaryStage) {

    GridPane pane = new GridPane();
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        TextField text = new TextField(Integer.toString((int) (Math.random() * 2)));
        text.setMinWidth(WIDTH / 10.0);
        text.setMaxWidth(WIDTH / 10.0);
        text.setMinHeight(HEIGHT / 10.0);
        text.setMaxHeight(HEIGHT / 10.0);
        pane.add(text, j, i);
      }
    }
    Scene scene = new Scene(pane, WIDTH, HEIGHT);
    primaryStage.setScene(scene);
    primaryStage.setMinWidth(WIDTH);
    primaryStage.setMinHeight(HEIGHT);
    primaryStage.setTitle("10 by 10 matrix");
    primaryStage.show();
  }
  public Veld1RijtechniekKijktechniek(
      SchermController schermCtrl, EvaController evaCtrl, LeerlingController llnCtrl) {
    evaController = evaCtrl;
    schermController = schermCtrl;
    llnController = llnCtrl;

    this.llnController.getLeerling().addView(this);

    aandachtBtn = new Button("Aandachtspunt");
    aandachtBtn.setOnAction(
        new EventHandler<ActionEvent>() {
          @Override
          public void handle(ActionEvent e) {
            aandacht();
          }
        });

    commentaarCol = new TableColumn("Commentaar");
    commentaarCol.setCellValueFactory(new PropertyValueFactory<Rijtechniek, String>("commentaar"));
    commentaarCol.setCellFactory(TextFieldTableCell.forTableColumn());
    commentaarCol.setOnEditCommit(
        new EventHandler<CellEditEvent<Rijtechniek, String>>() {
          @Override
          public void handle(CellEditEvent<Rijtechniek, String> t) {
            ((Rijtechniek) t.getTableView().getItems().get(t.getTablePosition().getRow()))
                .setCommentaar(t.getNewValue());
          }
        });

    table.setItems(data);
    table.getColumns().addAll(commentaarCol);

    commentaarFld = new TextField();
    commentaarFld.setPromptText("Commentaar");

    addButton = new Button("Voeg toe");
    addButton.setOnAction(
        new EventHandler<ActionEvent>() {
          @Override
          public void handle(ActionEvent e) {
            resetAandachtBtn();
            if (!"".equals(commentaarFld.getText())) {
              data.add(new Rijtechniek(commentaarFld.getText()));
              commentaarFld.clear();
            }
          }
        });
    table.setItems(data);
    table.setOnMouseClicked(
        new EventHandler<MouseEvent>() {
          @Override
          public void handle(MouseEvent e) {
            resetAandachtBtn();
          }
        });
    table.setEditable(true);

    vBox2.getChildren().addAll(table, commentaarFld);
    exit = new Button("Ga terug");

    exit.setOnAction(
        new EventHandler<ActionEvent>() {
          @Override
          public void handle(ActionEvent e) {
            evaController.saveListDataRijtechniek("Stuurtechniek", data);
            Veld1RijtechniekKijktechniek.this.schermController.setScherm(MainApp.RIJTECHNIEK_ID);
            resetAandachtBtn();
          }
        });
    delBtn = new Button("Verwijder");
    delBtn.setOnAction(
        new EventHandler<ActionEvent>() {
          @Override
          public void handle(ActionEvent e) {
            resetAandachtBtn();

            table.getItems().remove(table.getSelectionModel().getSelectedItem());
          }
        });
    delBtn.setMinHeight(30);
    delBtn.setMaxHeight(30);
    delBtn.setMinWidth(125);
    delBtn.setMaxWidth(125);
    delBtn.setAlignment(Pos.CENTER);
    delBtn.setTranslateX(-47);
    delBtn.setStyle("-fx-background-color: #5F6A95; -fx-text-fill:white");
    table.getStylesheets().add("resource/tableView.css");
    commentaarFld.setStyle("-fx-background-color:#789EBF; -fx-text-fill:white");
    commentaarCol.setMaxWidth(496);
    commentaarCol.setMinWidth(496);
    hBox1.getChildren().addAll(titelAfb, titel);
    hBox1.setMinHeight(50);
    hBox1.setMaxHeight(50);
    hBox1.setMinWidth(600);
    hBox1.setMaxWidth(600);
    hBox1.setSpacing(15);
    hBox1.setAlignment(Pos.CENTER);
    titelAfb.setFitHeight(50);
    titelAfb.setFitWidth(50);
    titel.setStyle("-fx-font: 40px Tahoma; -fx-text-fill:white");

    table.setMinWidth(500);
    table.setMaxWidth(500);
    table.setMinHeight(400);
    table.setMaxHeight(400);
    addButton.setMinHeight(30);
    addButton.setMaxHeight(30);
    addButton.setMinWidth(150);
    addButton.setMaxWidth(150);
    addButton.setAlignment(Pos.CENTER);
    aandachtBtn.setMinHeight(30);
    aandachtBtn.setMaxHeight(30);
    aandachtBtn.setMinWidth(150);
    aandachtBtn.setMaxWidth(150);
    aandachtBtn.setAlignment(Pos.CENTER);
    exit.setMinHeight(30);
    exit.setMaxHeight(30);
    exit.setMinWidth(150);
    exit.setMaxWidth(150);
    exit.setAlignment(Pos.CENTER);
    commentaarFld.setMinHeight(30);
    commentaarFld.setMaxHeight(30);
    commentaarFld.setMinWidth(250);
    commentaarFld.setMaxWidth(250);
    commentaarFld.setAlignment(Pos.CENTER);
    table.setTranslateX(70);
    commentaarFld.setTranslateX(90);
    addButton.setTranslateX(90);
    aandachtBtn.setTranslateX(90);
    exit.setTranslateX(90);

    addButton.setStyle("-fx-background-color: #5F6A95; -fx-text-fill:white");
    exit.setStyle("-fx-background-color: #5F6A95; -fx-text-fill:white");
    aandachtBtn.setStyle("-fx-background-color: #5F6A95; -fx-text-fill:white");

    gp.setStyle(
        "-fx-border-color: #282E54; -fx-border-radius:10 10 10 10;"
            + "-fx-effect: dropshadow(three-pass-box, rgba(0,0,0,0.8), 10, 0, 0, 0);"
            + "-fx-background-color: #282B3A;"
            + "-fx-background-radius: 5;");
    gp.setMaxWidth(900);
    gp.setMinWidth(900);
    gp.setMinHeight(600);
    gp.setMaxHeight(600);
    gp.setHgap(50);
    gp.setVgap(20);
    gp.setAlignment(Pos.CENTER);
    gp.add(hBox1, 0, 0, 2, 1);
    gp.add(table, 0, 1, 2, 1);
    gp.add(commentaarFld, 0, 2);
    gp.add(addButton, 1, 2);
    gp.add(aandachtBtn, 0, 3);
    gp.add(exit, 1, 3);
    gp.add(delBtn, 1, 3);

    this.setAlignment(Pos.CENTER);
    this.getChildren().add(gp);
    this.setStyle("-fx-background-image: url('resource/achtergrondStandaard.png')");

    update();
  }