JavaFX在场景图控件上循环

Question

如何循环播放场景的控件？我尝试使用getChildrenUnmodifiable()但它只返回第一级子级.

public void rec(Node node){

    f(node);

    if (node instanceof Parent) {
        Iterator<Node> i = ((Parent) node).getChildrenUnmodifiable().iterator();

        while (i.hasNext()){
            this.rec(i.next());
        }
    }
}

Answer 1

您需要递归扫描.例如:

private void scanInputControls(Pane parent) {
    for (Node component : parent.getChildren()) {
        if (component instanceof Pane) {
            //if the component is a container, scan its children
            scanInputControls((Pane) component);
        } else if (component instanceof IInputControl) {
            //if the component is an instance of IInputControl, add to list
            lstInputControl.add((IInputControl) component);
        }
    }
}

Answer 2

这是我正在使用的amru答案的修改版本,此方法为您提供特定类型的组件:

private <T> List<T> getNodesOfType(Pane parent, Class<T> type) {
    List<T> elements = new ArrayList<>();
    for (Node node : parent.getChildren()) {
        if (node instanceof Pane) {
            elements.addAll(getNodesOfType((Pane) node, type));
        } else if (type.isAssignableFrom(node.getClass())) {
            //noinspection unchecked
            elements.add((T) node);
        }
    }
    return Collections.unmodifiableList(elements);
}

要获得所有组件:

List<Node> nodes = getNodesOfType(pane, Node.class);

只获得按钮:

List<Button> buttons= getNodesOfType(pane, Button.class);