/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 */

package helloworld;

import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.beans.value.WritableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Point3D;
import javafx.scene.Camera;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.PerspectiveCamera;
import javafx.scene.Scene;
import javafx.scene.SubScene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.effect.BoxBlur;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.paint.CycleMethod;
import javafx.scene.paint.LinearGradient;
import javafx.scene.paint.Paint;
import javafx.scene.paint.Stop;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.util.Duration;

public class HelloSubScene extends Application {
    private static final boolean addTextField = false;
    private static final boolean addEffects = false;

    public static <T> Timeline startAnimation(WritableValue<T> target, T endValue, float millis) {
        Timeline timeline = new Timeline();
        timeline.setCycleCount(Timeline.INDEFINITE);
        timeline.setAutoReverse(true);
        final KeyValue kv = new KeyValue(target, endValue);
        final KeyFrame kf = new KeyFrame(Duration.millis(millis), kv);
        timeline.getKeyFrames().add(kf);
        return timeline;
    }

    public static Paint getLinearGradPaint() {
            final Stop[] stops =
            new Stop[]{new Stop(0.0F, Color.TRANSPARENT),
                       new Stop(0.5F, Color.LIGHTBLUE),
                       new Stop(0.9F, Color.TRANSPARENT)};
        return new LinearGradient(0.0f, 0.0f, 1.0f, 1.0f, true, CycleMethod.NO_CYCLE, stops);
    }

    private static SubScene createSubScene(String title, Paint fillPaint, Camera camera) {
        Group root = new Group();
        root.getChildren().add(someNodes(title));

        SubScene subScene = new SubScene(root, 150, 150);
        subScene.setFill(fillPaint);
        subScene.setCamera(camera);

        return subScene;
    }

    private static Parent someNodes(String str) {
        VBox vbox = new VBox();
        final Text text = new Text(str);
        text.setFont(Font.font("Times New Roman", 16));
        if (addEffects) {
            text.setEffect(new BoxBlur());
        }

        Button button = new Button("Button");
        button.setTranslateZ(50);
        button.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent t) {
                System.out.println("Button action from " + text.getText());
            }
        });

        vbox.getChildren().add(text);
        vbox.getChildren().add(button);
        if (addTextField) {
            TextField field = new TextField(str + " Textfield");
            field.setFocusTraversable(true);
            field.focusedProperty().addListener(new ChangeListener() {
                @Override
                public void changed(ObservableValue ov, Object t, Object t1) {
                    System.out.println("TextField focus " + t1);
                }
            });
            vbox.getChildren().add(field);
        }

        return vbox;
    }


    @Override
    public void start(Stage stage) {
        stage.setTitle("HelloSubScene");

        Group root = new Group();
        
        HBox hbox = new HBox();
        hbox.setTranslateY(50);
        root.getChildren().add(hbox);

        Scene scene = new Scene(root);

        SubScene plainSubScene = createSubScene("Plain SubScene", Color.GOLD, null);
        SubScene subSubScene = createSubScene("Embedded SubScene", getLinearGradPaint(), null);
        subSubScene.setHeight(subSubScene.getHeight()/2);
        subSubScene.setTranslateY(150/2);
        ((Group)plainSubScene.getRoot()).getChildren().add(subSubScene);
        hbox.getChildren().add(plainSubScene);
        SubScene animatedSubScene = createSubScene("SubScene with Gradient\nand\nPerspective Camera", getLinearGradPaint(), new PerspectiveCamera());
        hbox.getChildren().add(animatedSubScene);
        startAnimation(animatedSubScene.rotateProperty(), 360.0, 40000.0f).play();
        animatedSubScene.setRotationAxis(new Point3D(1.0, 1.0, 0.0));

        SubScene overlaySubScene = createSubScene("Overlay Sub Scene", null, null);
        overlaySubScene.setWidth(plainSubScene.getWidth() + animatedSubScene.getWidth());
        root.getChildren().add(overlaySubScene);

        stage.setScene(scene);
        stage.show();
    }

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

}