In C# I found a method that was pretty sweet that allowed you to get all the descendants and all of THEIR descendants from a specified control.
I'm looking for a similar method for JavaFX.
I saw that the Parent class is what I want to work with since it is the class from which all Node classes that bear children are derived.
This is what I have so far (and I haven't really found anything on google with searches like "JavaFX get all nodes from a scene"):
public static ArrayList<Node> GetAllNodes(Parent root){
ArrayList<Node> Descendents = new ArrayList<>();
root.getChildrenUnmodifiable().stream().forEach(N -> {
if (!Descendents.contains(N)) Descendents.add(N);
if (N.getClass() == Parent.class) Descendents.addAll(
GetAllNodes((Parent)N)
);
});
}
So how do I tell if N is a parent (or extended from a parent)? Am I doing that right? It doesn't seem to be working... It's grabbing all the nodes from the root (parent) node but not from the nodes with children in them. I feel like this is something that's probably got an answer to it but I'm just asking the question... wrong. How do I go about doing this?
public static ArrayList<Node> getAllNodes(Parent root) {
ArrayList<Node> nodes = new ArrayList<Node>();
addAllDescendents(root, nodes);
return nodes;
}
private static void addAllDescendents(Parent parent, ArrayList<Node> nodes) {
for (Node node : parent.getChildrenUnmodifiable()) {
nodes.add(node);
if (node instanceof Parent)
addAllDescendents((Parent)node, nodes);
}
}
I use this,
public class NodeUtils {
public static <T extends Pane> List<Node> paneNodes(T parent) {
return paneNodes(parent, new ArrayList<Node>());
}
private static <T extends Pane> List<Node> paneNodes(T parent, List<Node> nodes) {
for (Node node : parent.getChildren()) {
if (node instanceof Pane) {
paneNodes((Pane) node, nodes);
} else {
nodes.add(node);
}
}
return nodes;
}
}
Usage,
List<Node> nodes = NodeUtils.paneNodes(aVBoxOrAnotherContainer);
This source code uses the references of the existing nodes. It does not clone them.