class   EditStage extends Stage {

   private UIBspTableView05.Student std=null;
   public boolean retcode=false;

   private   TextField tLastname = new TextField("") ;
   private   TextField tFirstname = new TextField("") ;
   private   TextField tMnr = new TextField("") ;
   private   ChoiceBox choiceNote = new ChoiceBox () ;

   private double[] noten = {1.0,1.3, 1.7,  2.0,2.3, 2.7,  3.0,3.3, 3.7, 4.0,5.0 };


   public EditStage (Stage parent, UIBspTableView05.Student std) {
     this.std=std;
     setGUI();
     setResizable(true);
     this.initOwner(parent);
     initModality(Modality.WINDOW_MODAL);   // javafx.stage.Modality
     this.setTitle("UIBspGridPane05 edit student");        

   }


   private void setGUI() {
            GridPane gridpane = new GridPane();       
            gridpane.setVgap(25);
            gridpane.setHgap(15);
            gridpane.setGridLinesVisible(true);
            gridpane.setPadding(new Insets(10) );  // TRBL

           ColumnConstraints column1 = new ColumnConstraints();
           //column1.setPercentWidth(0);
           ColumnConstraints column2 = new ColumnConstraints();
           column2.setPercentWidth(100);
           gridpane.getColumnConstraints().addAll(column1, column2); 

            Label label = new Label("Bearbeiten eines Studenten") ;
            label.setFont(new Font("Courier New",32));
            label.setTextFill(Color.BLUE);
            gridpane.add(label, 0, 0,2,1); // column=1 row=0


            label = new Label("Nachname") ;
            label.setFont(new Font("Courier New",22));
            gridpane.add(label, 0, 1); // column=1 row=0

            tLastname .setFont(new Font("Courier New",22));
            gridpane.add(tLastname, 1, 1); // column=1 row=0
            gridpane.setHgrow(tLastname, Priority.ALWAYS);

             // -----------------------------------------------------

            label = new Label("Vorname") ;
            label.setFont(new Font("Courier New",22));
            gridpane.add(label, 0, 2); // column=1 row=0

            tFirstname.setFont(new Font("Courier New",22));
            gridpane.add(tFirstname, 1, 2); // column=1 row=0
            gridpane.setHgrow(tFirstname, Priority.ALWAYS);

             // -----------------------------------------------------
            label = new Label("MatrikelNr") ;
            label.setFont(new Font("Courier New",22));
            gridpane.add(label, 0, 3); // column=1 row=0

            tMnr .setFont(new Font("Courier New",22));
            gridpane.add(tMnr, 1, 3); // column=1 row=0
            gridpane.setHgrow(tMnr, Priority.ALWAYS);


             // -----------------------------------------------------
            label = new Label("Note") ;
            label.setFont(new Font("Courier New",22));
            gridpane.add(label, 0, 4); // column=1 row=0

            choiceNote.getItems().add(1.0);
            choiceNote.getItems().add(1.3);
            choiceNote.getItems().add(1.7);
            choiceNote.getItems().add(2.0);
            choiceNote.getItems().add(2.3);
            choiceNote.getItems().add(2.7);
            choiceNote.getItems().add(3.0);
            choiceNote.getItems().add(3.3);
            choiceNote.getItems().add(3.7);
            choiceNote.getItems().add(4.0);
            choiceNote.getItems().add(5.0);
            choiceNote.setStyle("-fx-font: 22px \"Serif\";");
            choiceNote.setPrefWidth(200);

            //choiceNote .setFont(new Font("Courier New",22));
            gridpane.add(choiceNote, 1, 4); // column=1 row=0
            gridpane.setHgrow(choiceNote, Priority.ALWAYS);

             // -----------------------------------------------------

            FlowPane boxpane = new FlowPane(20,20);    
            boxpane.setBorder(new Border(new BorderStroke(Color.RED, 
            BorderStrokeStyle.SOLID, CornerRadii.EMPTY, BorderWidths.DEFAULT)));
            boxpane.setAlignment(Pos.CENTER);
            boxpane.setMaxWidth(Double.POSITIVE_INFINITY);
            gridpane.add(boxpane, 0, 5,2,1); // column=1 row=0
            gridpane.setHalignment(boxpane, HPos.CENTER);


            Button bnOk = new Button("Ok") ;
            bnOk.setFont(new Font("Courier New",22));            
            bnOk.setMaxWidth(Double.POSITIVE_INFINITY);
            bnOk.setOnAction(e->okClick());
            boxpane.getChildren().add(bnOk);
            boxpane.setMargin(bnOk, new Insets(0, 10, 0, 10) );  // TRBL

            Button bnEsc = new Button("Esc") ;
            bnEsc.setFont(new Font("Courier New",22));            
            bnEsc.setMaxWidth(Double.POSITIVE_INFINITY);
            bnEsc.setOnAction(e->escClick());
             boxpane.getChildren().add(bnEsc);
            boxpane.setMargin(bnEsc, new Insets(0, 10, 0, 10) );  // TRBL


            tLastname.setText(std.getLastname());
            tFirstname.setText(std.getFirstname());
            tMnr.setText(Integer.toString(std.getMnr()));

            for (int i=0; i