我在JavaFX 2.2中有一个简单的过渡。
Duration onDuration = Duration.seconds(3);
Duration offDuration = Duration.seconds(3);
Duration transitionDuration = Duration.seconds(1);
long start = System.nanoTime();
SequentialTransition sequentialTransition = new SequentialTransition();
FillTransition offOnTransition = new FillTransition(transitionDuration, rectangle, Color.RED, Color.BLUE);
offOnTransition.setDelay(offDuration);
offOnTransition.setOnFinished(event -> {
System.out.println("off " + java.time.Duration.ofNanos(System.nanoTime() - start));
});
FillTransition onOffTransition = new FillTransition(transitionDuration, rectangle, Color.BLUE, Color.RED);
onOffTransition.setDelay(onDuration);
onOffTransition.setOnFinished(event -> {
System.out.println("on " + java.time.Duration.ofNanos(System.nanoTime() - start));
});
sequentialTransition.getChildren().addAll(offOnTransition, onOffTransition);
sequentialTransition.setCycleCount(Animation.INDEFINITE);
sequentialTransition.play();
动画效果很好，但与off / on过渡相关的onFinished事件在每个周期中触发多次（第一个除外）。
off PT4.030136579S
on PT8.029348018S
off PT11.021809501S
off PT11.023261246S
off PT11.037672786S
off PT11.053672008S
off PT11.069759654S
off PT11.085694536S
off PT11.101688478S
off PT11.11768704S
off PT11.133684612S
off PT11.149685153S
off PT11.16570879S
off PT11.181750244S
off PT11.197694035S
off PT11.213704474S
off PT11.22973174S
off PT11.245711825S
off PT11.261728533S
off PT11.27770004S
off PT11.29370454S
off PT11.30971201S
off PT11.325711891S
off PT11.341714742S
off PT11.357717922S
off PT11.373732321S
off PT11.389718345S
off PT11.405718226S
off PT11.421730315S
off PT11.437758571S
off PT11.453762412S
off PT11.469738867S
off PT11.485735119S
off PT11.501750178S
off PT11.51774445S
off PT11.53375027S
off PT11.549748831S
off PT11.565745083S
off PT11.581747604S
off PT11.59777487S
off PT11.613758585S
off PT11.629746918S
off PT11.645779463S
off PT11.661767137S
off PT11.677768668S
off PT11.693779767S
off PT11.709779648S
off PT11.725786458S
off PT11.741792278S
off PT11.75778655S
off PT11.773784782S
off PT11.789783343S
off PT11.805769037S
off PT11.821770568S
off PT11.837772429S
off PT11.853796066S
off PT11.86983752S
off PT11.885818594S
off PT11.901811217S
off PT11.917850031S
off PT11.933827146S
off PT11.949833297S
off PT11.965829548S
off PT11.981802044S
off PT11.997842839S
off PT12.013836781S
off PT12.029932675S
on PT16.029359566S
当我将转换的顺序切换为：
sequentialTransition.getChildren().addAll(onOffTransition, offOnTransition);
这是触发多个事件的开/关转换。我该如何解决这个问题？