在JavaFX中将形状绑定在一起-Java 学习之路

我试图将一些形状绑定在一起，所以当我拖动圆圈时，线条也将跟随它 . 拖动时圆圈移动，但线条不跟随 . 我正在尝试使用.bind，但它似乎没有做任何事情 . 以下是一些相关方法 .

private Line connect(Line line, Circle startNode, Circle endNode) {
        line.startXProperty().bind(startNode.centerXProperty());
        line.startYProperty().bind(startNode.centerYProperty());
        line.endXProperty().bind(endNode.centerXProperty());
        line.endYProperty().bind(endNode.centerYProperty());

    return line;
}    

private void pointsToShapes() {
    connect(leftArm, neckNode, leftHandNode);

    leftHandNode.setCenterX(leftHand.x);
    leftHandNode.setCenterY(leftHand.y);

    neckNode.setCenterX(shoulder.x);
    neckNode.setCenterY(shoulder.y);

}
    leftHandNode.setOnMousePressed(mp);

    leftHandNode.setOnMouseDragged(md);     

    //mouse pressed
    EventHandler<MouseEvent> mp = new EventHandler<MouseEvent>() {
    @Override
       public void handle(MouseEvent t) {
        System.out.println("pressed");
        sceneX = t.getSceneX();
        sceneY = t.getSceneY();
        translateX = ((Circle)(t.getSource())).getTranslateX();
        translateY = ((Circle)(t.getSource())).getTranslateY();
        }
    };

   //mouse dragged 
    EventHandler<MouseEvent> md = new EventHandler<MouseEvent>() {
        @Override
        public void handle(MouseEvent t) {
            System.out.println("dragged");
            double offsetX = t.getSceneX() - sceneX;
            double offsetY = t.getSceneY() - sceneY;
            double newTranslateX = translateX + offsetX;
            double newTranslateY = translateY + offsetY;

            ((Circle)(t.getSource())).setTranslateX(newTranslateX);
            ((Circle)(t.getSource())).setTranslateY(newTranslateY);
        }
    };

1 回答

正如@fabian所提到的，您需要在绑定到行属性时考虑转换属性 .

private Line connect(Line line, Circle startNode, Circle endNode) {
        line.startXProperty().bind(startNode.centerXProperty().add(startNode.translateXProperty()));
        line.startYProperty().bind(startNode.centerYProperty().add(startNode.translateYProperty()));
        line.endXProperty().bind(endNode.centerXProperty().add(endNode.translateXProperty()));
        line.endYProperty().bind(endNode.centerYProperty().add(endNode.translateYProperty()));

    return line;
}

回复于 2024-05-19T04:05:54+08:00

在JavaFX中将形状绑定在一起

1 回答

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