javafx.scene.layout.BackgroundFill#getInsets ( )源码实例Demo

/**
     * Constructs the animation
     *
     * @param node       the node to animate
     * @param colorA     the color to start with
     * @param colorB     the other color
     * @param colorSteps how many interpolations between the two colors
     */
    public GlowBackground(Region node, Color colorA, Color colorB, int colorSteps) {
        super(node);
        this.originalBackground = getNode().backgroundProperty().get();
        if (originalBackground != null && !originalBackground.getFills().isEmpty()) {
            BackgroundFill lastFill = originalBackground.getFills().get(originalBackground.getFills().size() - 1);
            originalRadii = lastFill.getRadii();
            originalInsets = lastFill.getInsets();
        } else {
            originalRadii = CornerRadii.EMPTY;
            originalInsets = Insets.EMPTY;
        }

        int totalFrames = colorSteps * 2;
        double millisPerFrame = 1000 / totalFrames;
        for (int i = 0; i < totalFrames; i++) {
            Color color;
            double frac = i * 2.0 / totalFrames;
            Duration dur = Duration.millis(i * millisPerFrame);
            if (i <= colorSteps) {
                color = colorA.interpolate(colorB, frac);
            } else {
                color = colorB.interpolate(colorA, frac - 1);
            }
            getTimeline().getKeyFrames().add(
                    new KeyFrame(dur,
                            new KeyValue(getNode().backgroundProperty(),
//                                    new Background(new BackgroundFill(color, CornerRadii.EMPTY, Insets.EMPTY)))));
                                    new Background(new BackgroundFill(color, originalRadii, originalInsets)))));
        }

    }
 

public static void updateBackground(Background newBackground, Region nodeToUpdate, Paint fill) {
    if (newBackground != null && !newBackground.getFills().isEmpty()) {
        final BackgroundFill[] fills = new BackgroundFill[newBackground.getFills().size()];
        for (int i = 0; i < newBackground.getFills().size(); i++) {
            BackgroundFill bf = newBackground.getFills().get(i);
            fills[i] = new BackgroundFill(fill, bf.getRadii(), bf.getInsets());
        }
        nodeToUpdate.setBackground(new Background(fills));
    }
}
 

private static String backgroundFillToString(BackgroundFill backgroundFill) {
    return "paint=" + backgroundFill.getFill() 
        + " insets=" + backgroundFill.getInsets()
        + " radii=" + backgroundFill.getRadii();
}