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
import javafx.collections.*;

import javafx.geometry.HPos;
import javafx.geometry.VPos;

import javafx.collections.*;

import javafx.scene.input.MouseEvent;
import javafx.scene.input.MouseButton;
import javafx.scene.control.ContextMenu;
import javafx.scene.input.ContextMenuEvent;

// Student
// Binding
import javafx.beans.property.StringProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.DoubleProperty;


public class UIBspListView06 extends Application  {

    private  ObservableList<Student> listeLinksStd = FXCollections.observableArrayList();
    private  ObservableList<Student> listeRechtsStd = FXCollections.observableArrayList();
           
    
    private ListView<Student> listviewLinks = new ListView<>() ;
    private ListView<Student> listviewRechts = new ListView<>() ;

    private  Button bnSave = new Button("Save") ;
    private  Button bnEsc = new Button("Esc") ;

    
     @Override 
     public void start(Stage stage) {
            GridPane gridpane = new GridPane();       
            gridpane.setVgap(15);
            gridpane.setHgap(10);
            gridpane.setGridLinesVisible(true);
            gridpane.setPadding(new Insets(10) );  // TRBL


           ColumnConstraints column1 = new ColumnConstraints();
           column1.setPercentWidth(100);

           ColumnConstraints column2 = new ColumnConstraints();
           column2.setPercentWidth(30);

           ColumnConstraints column3 = new ColumnConstraints();
           column3.setPercentWidth(100);
           gridpane.getColumnConstraints().addAll(column1, column2, column3); 


           RowConstraints row1 = new RowConstraints();
           row1.setPercentHeight(10);
           RowConstraints row2 = new RowConstraints();
           row2.setPercentHeight(10);
           RowConstraints row3 = new RowConstraints();
           row3.setPercentHeight(100);
           RowConstraints row4 = new RowConstraints();
           row4.setPercentHeight(100);
           RowConstraints row5 = new RowConstraints();
           row5.setPercentHeight(10);
           gridpane.getRowConstraints().addAll(row1, row2, row3, row4,row5); 


            Label labelHeader = new Label("Bearbeiten der Studentennoten") ;
            labelHeader.setFont(new Font("Courier New",22));
            gridpane.add(labelHeader, 0, 0,3,1); // column=1 row=0

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

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

            listeLinksStd.addAll(
              new Student("Andrea","Meier",12345),
              new Student("Ute","Hein",12545),
              new Student("Manfred","Tischler",12349),
              new Student("Uta","Hein",322545),
              new Student("Anton","Epple",12545),
              new Student("Fritz","Meier",12369),
              new Student("Helfried","Gordon",322645),
              new Student("Sebastian","Laisse",16545)
            ); 
            listviewLinks.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
            listviewLinks.setItems(listeLinksStd);
            listviewLinks.setOnMouseClicked(e-> listviewLinksOnClick(e));

            listviewLinks.setStyle("-fx-font: 22px \"Serif\";");
            gridpane.add(listviewLinks, 0, 2, 1,2); // column=1 row=0
            gridpane.setHgrow(listviewLinks, Priority.ALWAYS);


            listviewRechts.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
            listviewRechts.setItems(listeRechtsStd);
            listviewRechts.setOnMouseClicked(e-> listviewRechtsOnClick(e));

            listviewRechts.setStyle("-fx-font: 22px \"Serif\";");
            gridpane.add(listviewRechts, 2, 2,1,2); // column=1 row=0
            gridpane.setHgrow(listviewRechts, Priority.ALWAYS);
            listviewRechts.setOnMouseClicked(e-> listviewRechtsOnClick(e));


            Button bn2Right = new Button("=>") ;
            bn2Right.setFont(new Font("Courier New",22));
            gridpane.add(bn2Right, 1, 2); // column=1 row=0
            gridpane.setMargin(bn2Right, new Insets(10) );  // TRBL
            bn2Right.setOnAction(e->bn2RightClick());

            Button bn2Left = new Button("<=") ;
            bn2Left.setFont(new Font("Courier New",22));
            gridpane.add(bn2Left, 1, 3); // column=1 row=0
            gridpane.setMargin(bn2Left, new Insets(10) );  // TRBL
            bn2Left.setOnAction(e->bn2LeftClick());

            //Button bnAction = new Button("Eintragen") ;
            //bnAction.setFont(new Font("Courier New",22));
            //gridpane.add(bnAction, 2, 3); // column=1 row=0

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

            FlowPane boxpane = new FlowPane(20,20);    
            //boxpane.setAlignment(Pos.TOP_RIGHT);
            gridpane.add(boxpane, 0, 4,3,1); // column / row
            // gridpane.setHalignment(boxpane, HPos.RIGHT);


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

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



            Scene scene= new Scene(gridpane, 800, 580);
            stage.setTitle("UIBspListView06");        
            stage.setScene(scene);        
            stage.show();  
    }

 
    private void bn2RightClick() {
    System.out.println("in bn2RightClick");
       ObservableList<Student> selectedItems = listviewLinks.getSelectionModel().getSelectedItems();
       if (selectedItems != null) {
        System.out.println("selectedItems  ist nicht null  selectedItems.size()"+selectedItems.size());
           for (int i=selectedItems.size()-1; i>=0; i--) {
             Student std= selectedItems.get(i);
              System.out.println("-"+std.toString());
              listeRechtsStd.add(std);
              listeLinksStd.remove(std);
          }
        listviewLinks.getSelectionModel().clearSelection();
       }
       else {
        System.out.println("selectedItems  ist null");
      }
    }
    private void bn2LeftClick() {
       ObservableList<Student> selectedItems = listviewRechts.getSelectionModel().getSelectedItems();
       if (selectedItems != null) {
           for (int i=selectedItems.size()-1; i>=0; i--) {
             Student std= selectedItems.get(i);
              System.out.println("-"+std.toString());
              listeLinksStd.add(std);
              listeRechtsStd.remove(std);
          }
         listviewRechts.getSelectionModel().clearSelection();
       }
    }

    private void listviewLinksOnClick(MouseEvent e) {
        if (e.getButton()==MouseButton.PRIMARY && e.getClickCount()==2) {
              bn2RightClick();
          }
    }

    private void listviewRechtsOnClick(MouseEvent e) {
        if (e.getButton()==MouseButton.PRIMARY && e.getClickCount()==2) {
              bn2LeftClick();
          }
    }



    private void print() {
       StringBuilder sb = new StringBuilder(100);
       sb.append(":  ");
      System.out.println(sb.toString());

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

      }


private String insertString(String message, String title, String vorgabe) {
     TextInputDialog dialog = new TextInputDialog(vorgabe);
      dialog.setTitle(title);
      dialog.setContentText(message);
      dialog.setHeaderText(title);
      dialog.setResizable(true);
      java.util.Optional<String> result = dialog.showAndWait();

      if (result.isPresent()) {
            return (String)result.get();
      }
      else {
         return null; 
      }
    }

   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);   
      } 
}


class Student {


    private String lastname = "";
    public final String getLastname(){
          return lastname;
    }
    public void setLastname (String value) {
      lastname=value;
    }   //  setlastname


    private String firstname = "";
    public final String getFirstname(){
          return firstname;
    }
    public void setFirstname (String value) {
      firstname=value;
    }   //  setfirstname


    private int mnr = 0;
    public final int getMnr(){
          return mnr;
    }
    public void setMnr (int value) {
      mnr=value;
    }   //  setMnr


  public Student(String firstname, String lastname, int mnr) {
    this.firstname=firstname;
    this.lastname=lastname;
    this.mnr=mnr;
  }

  public String toString() {
    return lastname+", "+firstname;
  }

}  // class Student