カスタムListCellでマルチスレッドを扱うサンプル

src_sample_Controller.java

package sample;

import javafx.concurrent.Service;
import javafx.concurrent.Task;
import javafx.fxml.Initializable;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.control.ProgressBar;

import java.net.URL;
import java.util.ResourceBundle;

public class Controller implements Initializable {
    public ListView<Status> listView;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        listView.setCellFactory(param -> new ListCell<Status>() {
            @Override
            protected void updateItem(Status item, boolean empty) {
                super.updateItem(item, empty);
                ProgressBar root = (ProgressBar) getGraphic();
                if (item == null) {
                    if (root != null) {
                        ProgressBar progressBar = (ProgressBar) getGraphic();
                        progressBar.progressProperty().unbind();
                        setGraphic(null);
                    }
                    return;
                }

                if (root == null) {
                    root = new ProgressBar();
                    setGraphic(root);
                }
                root.progressProperty().bind(item.statusProperty());
            }
        });
    }

    public void addStatus() {
        StatusService service = new StatusService();
        Status status = new Status();
        status.statusProperty().bind(service.progressProperty());
        listView.getItems().add(status);
        service.start();
        service.setOnSucceeded(e -> listView.getItems().remove(status));
    }

    private static class StatusService extends Service<String> {

        @Override
        protected Task<String> createTask() {
            return new Task<String>() {

                @Override
                protected String call() throws InterruptedException {

                    for (int i = 0; i <= 100; i++) {
                        Thread.sleep(100);
                        updateProgress(i, 100);
                    }
                    return "A";
                }
            };
        }
    }
}

src_sample_Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("ListView Task Sample");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

src_sample_sample.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>

<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" xmlns="http://javafx.com/javafx/null" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
   <children>
      <ListView fx:id="listView" VBox.vgrow="ALWAYS" />
      <Button mnemonicParsing="false" text="追加" onAction="#addStatus"/>
       
   </children>
</VBox>

src_sample_Status.java

package sample;

import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;

public class Status {

    private DoubleProperty status = new SimpleDoubleProperty();

    public Status(double start) {
        status.set(start);
    }

    public Status() {
    }

    public double getStatus() {
        return status.get();
    }

    public DoubleProperty statusProperty() {
        return status;
    }

    public void setStatus(double status) {
        this.status.set(status);
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder("Status{");
        sb.append("status=").append(status);
        sb.append('}');
        return sb.toString();
    }
}