透明节点背景 [英] Transparent Node Background

问题描述

我如何以编程方式使Node的背景透明-(透明)；我目前正在将AnchorPane作为父节点与其他ProgressIndicator和其他节点作为子节点一起玩，我希望它们脱颖而出吗?我尝试使用Scene，它与我想要的不是很接近，有任何解决方法吗?

How do i programmatically make a Node's background transparent-(see through); I am currently playing with AnchorPane as a parent Node to other ProgressIndicator and other nodes as children, and i want them to stand out ? I tried with Scene and it wasn't close to what i wanted, any workaround?

让我们说

// suppose i have a fake layout like this
    AnchorPane ap = new AnchorPane();

    ProgressIndicator pi = new ProgressIndicator();
    ProgressIndicator pii = new ProgressIndicator();
    ProgressIndicator piii = new ProgressIndicator();
    ProgressIndicator piiii = new ProgressIndicator();
    AnchorPane.setRightAnchor(pi, 0.0);
    AnchorPane.setBottomAnchor(piii, 0.0);
    AnchorPane.setRightAnchor(piiii, 0.0);
    AnchorPane.setBottomAnchor(piiii, 0.0);
    AnchorPane.setLeftAnchor(piii, 0.0);
    Circle circle = new Circle();
    circle.setRadius(50);
    circle.setFill(Color.RED);
    AnchorPane.setBottomAnchor(circle, 210.0);
    AnchorPane.setTopAnchor(circle, 210.0);
    AnchorPane.setLeftAnchor(circle, 210.0);
    AnchorPane.setRightAnchor(circle, 210.0);
    ap.getChildren().addAll(pi,pii,piii,circle,piiii);
    primaryStage.setScene(new Scene(ap,500,500));
    primaryStage.initStyle(StageStyle.UNDECORATED);
    primaryStage.show();

我的要求是让我的孩子Nodes脱颖而出，而没有AnchorPane的白色背景-(因此AnchorPane需要透明)，我该如何实现?

My requirement here is to make my children Nodes stand out,without the white background of the AnchorPane -(so AnchorPane needs to be transparent), how do i achieve that?

推荐答案

包括Stage，Scene和Layout Containers在内的所有内容都有其背景色.因此，如果您需要完整的透明背景，则需要为每个背景设置transparent fill.

Everything including Stage, Scene and Layout Containers have their background color. So if you need a complete transparent background, you need to set transparent fill to each of these.

用于舞台

primaryStage.initStyle(StageStyle.TRANSPARENT);

对于场景

scene.setFill(Color.TRANSPARENT);

对于容器

container.setBackground(Background.EMPTY);

为您的代码

Scene scene = new Scene(ap,500,500);
scene.setFill(Color.TRANSPARENT);
ap.setBackground(Background.EMPTY);
primaryStage.initStyle(StageStyle.TRANSPARENT);
primaryStage.setScene(scene);

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