import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javafx.scene.text.TextAlignment;
import javafx.scene.text.Font;
import javafx.geometry.Pos;
import javafx.geometry.Insets;
import javafx.scene.layout.Border;
import javafx.scene.layout.BorderStroke;
import javafx.scene.layout.BorderStrokeStyle;
import javafx.scene.layout.BorderWidths;
import javafx.scene.paint.Color;


import javafx.application.Platform;

import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.event.Event;


import javafx.beans.value.*;  // ChangeListener



public class UIBspSlider01 extends Application  {

    private ComboBox cbPizzaName = new ComboBox() ;
    private Slider sliderSize = null;
    private CheckBox chkMitZwiebel = new CheckBox("Mit Zwiebeln") ;
    private CheckBox chkMitMais = new CheckBox("Mit Mais") ;
    private TextField tErg = new TextField("") ;

    private  Button bnOk = new Button("Ok") ;
    private  Button bnEsc = new Button("Esc") ;

    
     @Override 
     public void start(Stage stage) {
             // https://docs.oracle.com/javase/8/javafx/api/javafx/scene/layout/VBox.html
             // https://docs.oracle.com/javase/8/javafx/api/toc.htm
            VBox root = new VBox(22);       
            root.setAlignment(Pos.CENTER);
            root.setFillWidth(true);


            cbPizzaName.getItems().add("Käse");
            cbPizzaName.getItems().add("Käse Schinken");
            cbPizzaName.getItems().add("Hawai");
            cbPizzaName.getItems().add("Salami / Schinken");
            cbPizzaName.getItems().add("Vegetarisch");
            cbPizzaName.getItems().add("Peperoni");
            cbPizzaName.getItems().add("Vier Jahreszeiten");
            cbPizzaName.getItems().add("Ei, ExtraKäse");
            cbPizzaName.setEditable(true);
            cbPizzaName.setPromptText("Bitte auswählen");
            HBox hbox = createComboBox(cbPizzaName , "Name der Pizza");
            root.getChildren().add(hbox);

            sliderSize = new Slider(5, 25.0, 2.0);
            sliderSize.setMajorTickUnit(1.0);
            sliderSize.setMinorTickCount(0);
            sliderSize.setShowTickLabels(true);
            sliderSize.setShowTickMarks(true);
            sliderSize.setSnapToTicks(true);

            sliderSize.valueProperty().addListener(new ChangeListener<Number>() {
               @Override public void changed(ObservableValue<? extends Number> observableValue, Number oldValue, Number newValue) {
                   showSliderGroesse(newValue);
              }
            });



            hbox = createSlider(sliderSize , "Größe der Pizza");
            root.getChildren().add(hbox);

            hbox = createButtonBase(chkMitZwiebel);
            root.getChildren().add(hbox);

            hbox = createButtonBase(chkMitMais );
            root.getChildren().add(hbox);



            hbox = createTextInputControl(tErg, "Ergebnis");
            root.getChildren().add(hbox);

            FlowPane boxpane = new FlowPane(20,20);    
            boxpane.setAlignment(Pos.CENTER);
            boxpane.setMaxWidth(Double.POSITIVE_INFINITY);
            root.getChildren().add(boxpane);

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

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

            Scene scene= new Scene(root, 760, 400);
            stage.setTitle("UIBspSlider01");        
            stage.setScene(scene);        
            stage.show();  
    }


     private HBox createTextInputControl(TextInputControl control, String caption) {
            HBox hbox = new HBox(22);    
            hbox.setFillHeight(true);
            hbox.setMaxWidth(Double.POSITIVE_INFINITY);

            Label label = new Label(caption) ;
            label.setFont(new Font("Courier New",22));
            hbox.getChildren().add(label);
            hbox.setMargin(label, new Insets(5, 0, 0, 10) );  // TRBL


            control.setFont(new Font("Courier New",22));
            control.setMaxWidth(Double.POSITIVE_INFINITY);
            hbox.getChildren().add(control);
            hbox.setHgrow(control, Priority.ALWAYS);
            hbox.setMargin(control, new Insets(0, 10, 0, 10) );  // TRBL
            return hbox;
     }
     
     private HBox createComboBox(ComboBox control, String caption) {
            HBox hbox = new HBox(22);    
            hbox.setFillHeight(true);
            hbox.setMaxWidth(Double.POSITIVE_INFINITY);

            Label label = new Label(caption) ;
            label.setFont(new Font("Courier New",22));
            hbox.getChildren().add(label);
            hbox.setMargin(label, new Insets(5, 0, 0, 10) );  // TRBL


            // control.setFont(new Font("Courier New",22));  // gibt es nicht ??
            control.setMaxWidth(Double.POSITIVE_INFINITY);
            hbox.getChildren().add(control);
            hbox.setHgrow(control, Priority.ALWAYS);
            hbox.setMargin(control, new Insets(0, 10, 0, 10) );  // TRBL
            return hbox;
     }

     private HBox createSlider(Slider control, String caption) {
            HBox hbox = new HBox(22);    
            hbox.setFillHeight(true);
            hbox.setMaxWidth(Double.POSITIVE_INFINITY);

            Label label = new Label(caption) ;
            label.setFont(new Font("Courier New",22));
            hbox.getChildren().add(label);
            hbox.setMargin(label, new Insets(5, 0, 0, 10) );  // TRBL


            // control.setFont(new Font("Courier New",22));  // gibt es nicht ??
            control.setMaxWidth(Double.POSITIVE_INFINITY);
            hbox.getChildren().add(control);
            hbox.setHgrow(control, Priority.ALWAYS);
            hbox.setMargin(control, new Insets(0, 10, 0, 10) );  // TRBL
            return hbox;
     }


     private HBox createButtonBase(ButtonBase control) {
            HBox hbox = new HBox(22);    
            hbox.setFillHeight(true);
            hbox.setMaxWidth(Double.POSITIVE_INFINITY);

            control.setFont(new Font("Courier New",22));
            control.setMaxWidth(Double.POSITIVE_INFINITY);
            hbox.getChildren().add(control);
            hbox.setHgrow(control, Priority.ALWAYS);
            hbox.setMargin(control, new Insets(0, 10, 0, 10) );  // TRBL
            return hbox;
     }
     

    private void showSliderGroesse(Number value) {
        System.out.println("SpinnerGroesse:  index: "+ value);
   }
      private void calc() {
       StringBuilder sb = new StringBuilder(100);
       String pizza = (String)cbPizzaName.getValue();
       if (pizza==null) {
           errorBox("Bitte geben Sie einen Pizzanamen ein","Hinweis");
           return;
       }
       sb.append(pizza);
       sb.append(":  ");

      double size = sliderSize.getValue();
       sb.append(size);
       sb.append(":  ");

       if (chkMitZwiebel.isSelected()) {
         sb.append(",  mit Zwiebeln  ");
       }
       if (chkMitMais.isSelected()) {
         sb.append(",  mit Mais  ");
       }
  

      tErg.setText(sb.toString());
        
      }

 public void errorBox( String message, String title) {
         Dialog alert = new Alert(Alert.AlertType.ERROR,message);
         alert.setTitle(title);
         alert.setHeaderText(title);
         alert.setResizable(true);
         alert.show();
//        a.setContentText(content);
      } // ErrorBox
      public static void main(String[] argv) {       
              launch(argv);   
      } 
}