JavaFX Article | Creating an Image Slide Show

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package slideshow;

import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.animation.Timeline;
import javafx.animation.transition.FadeTransition;
import javafx.animation.KeyFrame;

def images = for(i in [1..4]){Image {url: "{__DIR__}pic{i}.jpg"};}
def imageView = ImageView {image: bind currImg};
var currImg = images[0];

def fade = FadeTransition {
    duration: .5s
    node: imageView
    fromValue: 1.0
    toValue: 0.1
    repeatCount: 2
    autoReverse: true
}

Timeline {
    repeatCount: Timeline.INDEFINITE
    keyFrames: [at(0s){currImg => images[0]},
                KeyFrame{time: 4.5s action:function(){fade.play();}},
                at(5s){currImg => images[1]},
                KeyFrame{time: 9.5s action:function(){fade.play();}},
                at(10s){currImg => images[2]},
                KeyFrame{time: 14.5s action:function(){fade.play();}},
                at(15s){currImg => images[3]},
                KeyFrame{time: 19.5s action:function(){fade.play();}},
                at(20s){currImg => images[0]}]
}.play();

Stage {
    title: "JavaFX Slideshow"
    scene: Scene {
        width: 400
        height: 300
        fill: Color.BLACK
        content: imageView
    }
}