Dual ListView Selection with Observable Lists - Java JavaFX

Java examples for JavaFX:ListView

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Description

Dual ListView Selection with Observable Lists

Demo Code

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.VPos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class Main extends Application {

  public static void main(String[] args) {
    Application.launch(args);/*from  w  ww  .  j  a  v  a  2  s  . c  o  m*/
  }

  @Override
  public void start(Stage primaryStage) {
    Group root = new Group();
    Scene scene = new Scene(root, 400, 250, Color.WHITE);
    GridPane gridpane = new GridPane();
    gridpane.setPadding(new Insets(5));
    gridpane.setHgap(10);
    gridpane.setVgap(10);

    Label candidatesLbl = new Label("Candidates");
    GridPane.setHalignment(candidatesLbl, HPos.CENTER);
    gridpane.add(candidatesLbl, 0, 0);

    Label heroesLbl = new Label("Name");
    gridpane.add(heroesLbl, 2, 0);
    GridPane.setHalignment(heroesLbl, HPos.CENTER);

    // candidates
    final ObservableList<String> candidates = FXCollections
        .observableArrayList("A", "B", "C", "D",
            "E", "F", "G", "H", "I","J", "K");
    final ListView<String> candidatesListView = new ListView<>(candidates);
    candidatesListView.setPrefWidth(150);
    candidatesListView.setPrefHeight(150);

    gridpane.add(candidatesListView, 0, 1);

    final ObservableList<String> heroes = FXCollections.observableArrayList();
    final ListView<String> heroListView = new ListView<>(heroes);
    heroListView.setPrefWidth(150);
    heroListView.setPrefHeight(150);

    gridpane.add(heroListView, 2, 1);

    Button sendRightButton = new Button(">");
    sendRightButton.setOnAction((e) -> {
      String potential = candidatesListView.getSelectionModel()
          .getSelectedItem();
      if (potential != null) {
        candidatesListView.getSelectionModel().clearSelection();
        candidates.remove(potential);
        heroes.add(potential);
      }
    });

    Button sendLeftButton = new Button("<");
    sendLeftButton.setOnAction((e) -> {
      String notHero = heroListView.getSelectionModel().getSelectedItem();
      if (notHero != null) {
        heroListView.getSelectionModel().clearSelection();
        heroes.remove(notHero);
        candidates.add(notHero);
      }
    });

    VBox vbox = new VBox(5);
    vbox.getChildren().addAll(sendRightButton, sendLeftButton);

    gridpane.add(vbox, 1, 1);
    GridPane.setConstraints(vbox, 1, 1, 1, 2, HPos.CENTER, VPos.CENTER);

    root.getChildren().add(gridpane);
    primaryStage.setScene(scene);
    primaryStage.show();
  }
}

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