/*
 * ---------------
 * CursorExample.java
 * ---------------
 */
package cursorexample;

import javafx.application.Application;
import javafx.concurrent.Task;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.ImageCursor;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 * This class provides a quick demonstration on 
 * implementing different cursor styles in JavaFX.
 * 
 * @author Nathan Howard
 */
public class CursorExample extends Application {

    @Override
    public void start(Stage primaryStage) {

        /**
         * Setup Button.
         */
        Button btn = new Button();
        btn.setText("Count Iterations");

        /**
         * Setup Scene.
         */
        StackPane root = new StackPane();
        root.getChildren().add(btn);
        Scene scene = new Scene(root, 300, 250);

        btn.setOnMouseEntered(new EventHandler<MouseEvent>() {
            public void handle(MouseEvent me) {
                scene.setCursor(Cursor.HAND);  //Change the cursor to a Hand
            }
        });
        btn.setOnMouseExited(new EventHandler<MouseEvent>() {
            public void handle(MouseEvent me) {
                scene.setCursor(Cursor.CROSSHAIR);  //Change the cursor to a Crosshair
            }
        });

        /**
         * Add Listeners.
         */
        btn.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                /**
                 * Only for JavaFX Thread, use runLater if on main.
                 */
                Task<Integer> task = new Task<Integer>() {
                    @Override
                    protected Integer call() throws Exception {
                        int iterations;
                        scene.setCursor(Cursor.WAIT);  //Change cursor to wait style
                        for (iterations = 0; iterations < 100000; iterations++) {
                            System.out.println("Iteration " + iterations);
                        }
                        scene.setCursor(Cursor.DEFAULT);  //Change cursor to default style
                        return iterations;
                    }
                };
                Thread th = new Thread(task);
                th.setDaemon(true);
                th.start();
            }
        });

        Image image = new Image("batman.png");
        scene.setCursor(new ImageCursor(image));

        /**
         * Finalise Stage.
         */
        primaryStage.setTitle("Cursor Example");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}