java - 如何使 TreeView 调整大小与父 ScrollPane 一样多？

Question

我将 TreeView 放置为 ScrollPane 的内容。 ScrollPane 放置在 SplitPane 内部。当我拖动 SplitPane 的分隔线使其变得大于 TreeView 大小时，我看到 TreeView 的边框。我希望在拖动 SplitPane 的分隔线后，根据可用空间调整 TreeView 的大小。我的代码:

SplitPane splitPane = new SplitPane();
splitPane.getItems().addAll(createTreeOfConnections());

private ScrollPane createTreeOfConnections() {
ScrollPane scrollPane = new ScrollPane();
scrollPane.setMinSize(100, 300);
scrollPane.setPrefSize(200, 500);
    scrollPane.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);
scrollPane.setVbarPolicy(ScrollBarPolicy.AS_NEEDED);
scrollPane.setHbarPolicy(ScrollBarPolicy.AS_NEEDED);
scrollPane.setContent(new ConnectionsTree(this));
return scrollPane;

类 ConnectionsTree 扩展了 TreeView ，其构造函数是:

public ConnectionsTree(MainStage mainStage) {
        // here we set the root of ConnectionsTree which is not visible
        super();
        this.mainStage = mainStage;

        root = new ConnectionTreeItem();
        root.setExpanded(true);
        super.setRoot(root);
        super.setShowRoot(false);
        super.setEditable(false);
        super.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
        super.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);

        retrieveExistentConnectionsNodes();
        ContextMenu contextMenu = new ContextMenu(createNewConnectionMenuItem(
                "New Connection", KeyCombination.valueOf("Ctrl+N")));
        super.setContextMenu(contextMenu);                }

如何告诉TreeView(我的TreeConnections)它应该占用SplitPane左侧部分的所有可用空间？

谢谢!

Answer 1

试试这个

scrollPane.setFitToHeight(true);
scrollPane.setFitToWidth(true);