package custompatterns;

import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.image.PixelWriter;
import javafx.scene.image.WritableImage;
import javafx.scene.paint.Color;
import javafx.scene.paint.ImagePattern;
import javafx.scene.paint.Paint;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Duration;

public class CustomPatterns extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        Group root = new Group();

        // Size for a metal texture pattern
        final WritableImage bgimg = new WritableImage(6, 6);
        Paint imgpat = new ImagePattern(bgimg, 0, 0, 30, 30, false);
        final Rectangle r = new Rectangle(0, 0, 640, 480);
        r.setFill(imgpat);
        root.getChildren().add(r);

        ImageView view = new ImageView(bgimg);
        view.setFitWidth(150);
        view.setFitHeight(150);
        root.getChildren().add(view);

        final SimpleDoubleProperty hue = new SimpleDoubleProperty(0.0);
        hue.addListener(new InvalidationListener() {
            @Override
            public void invalidated(Observable o) {
                makeMetalPattern(bgimg, hue.get());
//                r.setFill(new ImagePattern(bgimg, 0, 0, 30, 30, false));
            }
        });
        makeMetalPattern(bgimg, hue.get());

        final Scene scene = new Scene(root, 640, 480);
        stage.setScene(scene);
        stage.setTitle("Animated Metal");
        stage.show();
        
        KeyValue kv = new KeyValue(hue, 360);
        KeyFrame kf = new KeyFrame(Duration.seconds(6), kv);
        Timeline tl = new Timeline(kf);
        tl.setCycleCount(Timeline.INDEFINITE);
        tl.play();
    }

    void makeMetalPattern(WritableImage img, double hue) {
        Color c1 = Color.hsb(hue, 0.5, 0.3);
        Color c2 = Color.hsb(hue, 0.3, 0.1);
        PixelWriter pw = img.getPixelWriter();
        for (int y = 0; y < 6; y++) {
            for (int x = 0; x < 6; x++) {
                pw.setColor(x, y, c2);
            }
        }
        pw.setColor(0, 0, c1);
        pw.setColor(1, 1, c1);
        pw.setColor(2, 2, c1);
        pw.setColor(3, 5, c1);
        pw.setColor(4, 4, c1);
        pw.setColor(5, 3, c1);
    }
}