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java - JSplitPane 中如何动态改变组件

问题描述

我正在创建一个动态变化的摆动框架。这是当前布局（我在 IntelliJ IDEA 工作）当前格式

如您所见，有一个 mainJPanel有一个JSplitPane. 里面JSplitPane有一个JTree（左）和一个JTable（右）。

因此，当我单击JTree要替换JTable为的Editor根节点时，当单击子节点时，该表将显示在那里。

public class SessionWindow {
    private JFrame mFrame;
    private JPanel container;
    private JTree tableTree;
    private JTable tableDetails;
    private JSplitPane jSplitPane;
    private JScrollPane jScrollTree;
    private JScrollPane jScrollTable;

    private JPanel editorPanel;
    private Project mProject;
    private Disposable parent;

    private ClientSocket socket;


    public SessionWindow(Project mProject, Disposable parent, ClientSocket socket) {
        super();
        this.mProject = mProject;
        this.parent = parent;
        this.socket = socket;

        mFrame = new JFrame();

        mFrame.setSize(new Dimension(1024, 500));
        mFrame.setResizable(true);
        mFrame.setTitle("Debug window");
        mFrame.setLayout(new BorderLayout());
        mFrame.add(container, BorderLayout.CENTER);
        mFrame.pack();
        mFrame.setVisible(true);

        jSplitPane.setResizeWeight(.4f);
        populateDatabase();

        tableTree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        tableTree.addTreeSelectionListener(e -> {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode)
                    tableTree.getLastSelectedPathComponent();

            /* if nothing is selected */
            if (node == null) return;

            IBaseModel model = (IBaseModel) node.getUserObject();
            if (model instanceof DTable) {
                showTablePane();
                DTable table = (DTable) model;
                populateTable(table);
            } else if (model instanceof DDatabase) {
                showEditorPane();
            }
        });
    }

    private void populateDatabase() {
        socket.requestDbDetails();
        DataObserver.getInstance().subscribe(listener);
    }

    private void showTablePane() {
        jSplitPane.setRightComponent(null);
        jSplitPane.setRightComponent(jScrollTree);
        jSplitPane.invalidate();
    }

    private void showEditorPane() {
        editorPanel = new JPanel();

        editorPanel.add(createEditor().getComponent(), BorderLayout.CENTER);

        jSplitPane.setRightComponent(null);
        jSplitPane.setRightComponent(editorPanel);
        jSplitPane.invalidate();
    }

    private Editor createEditor() {
       //create an return editor
        return editor;
    }
}

问题是当我用 替换表格时editor，editor它是正确的组件（不完全可见，但我们可以在那里看到它）但是当试图替换editor为table空时。

标签： javaswingjframe

解决方案

以下代码适用于我。我只需删除旧的孩子并添加新的孩子，记住分隔线的位置并重置它。我不知道是否需要重新验证/重新绘制，但我添加它是为了更好地衡量。

 /**
   * replace a child of a splitPane with another
   * @param oldChild
   * @param newChild
   */
  public void replaceSplitPaneChild(JComponent oldChild, JComponent newChild) {
    JSplitPane parent = (JSplitPane) oldChild.getParent();
    int dividerLocation = parent.getDividerLocation();
    parent.remove(oldChild);
    parent.add(newChild);
    parent.setDividerLocation(dividerLocation);
    newChild.revalidate();
    newChild.repaint();
  }

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