SelectionPathsに子ノードを追加する[]

Question

ネットワークデバイスを表示するツリーがあります。ツリーは、デバイスが場所とデバイスの種類によって表示されるようにフィルタリングされます。たとえば、ノード「Office」には、子ノード「コンピュータ」と「プリンタ」があり、その下にデバイスがあります。私は場所のノードを選択すると

は、私はそれの下ですべてのノードを選択し、それらがすべて強調表示されるように私の木のselectionPaths []に追加したいと思います。以下は私のコードですが、これをどうやって動かすかわかりません。

private class DefaultDeviceTreeCellRenderer extends DefaultTreeCellRenderer { 

    private JLabel label; 

    DefaultDeviceTreeCellRenderer() { 
     super(); 
     label = new JLabel(); 
    } 

    @Override 
    public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, 
      boolean leaf, int row, boolean hasFocus) { 
     DefaultMutableTreeNode node = (DefaultMutableTreeNode) value; 
     Object o = node.getUserObject(); 
     if (o instanceof DefaultDevice) { 
      DefaultDevice defaultDevice = (DefaultDevice) o; 
      label.setIcon(defaultDevice.getIcon()); 
      label.setText(defaultDevice.toString()); 
     } else { 
      System.out.println("Cell Class= " + o.getClass()); 
      //Set all children of this Component as selected. 
      label.setIcon(null); 
      label.setText("" + value); 
      TreePath[] selectionPaths = tree.getSelectionPaths(); 
      if (selectionPaths == null) { 
       System.out.println("Nothing Selected. "); 
      } else { 
       //keep current selection path 
       //if there are leaf nodes, add their selection paths. 
       int i = 0; 
       while (i < node.getChildCount()) { 
        //add node.getNextLeaf().getPath() to selection Paths 
        ArrayList<TreePath> arrayList = new ArrayList<>(Arrays.asList(selectionPaths)); 
        arrayList.add(new TreePath(((DefaultMutableTreeNode)node.getChildAt(i)).getPath())); 
        TreePath[] toArray = arrayList.toArray(new TreePath[arrayList.size()]); 
        this.printSelectionPath(selectionPaths); 
        this.printSelectionPath(toArray); 
        // tree.setSelectionPaths(toArray); 
        i++; 
       } 
      } 
      // System.out.println("Selection Paths.size="+selectionPaths.length); 
      // ArrayList arrayList = new ArrayList(Arrays.asList(selectionPaths)); 
      // System.out.println("ChildNode Path=" + node.getPath()[a]); 

     } 
     label.setOpaque(true); 
     if (selected) { 

      label.setBackground(this.backgroundSelectionColor); 
      label.setForeground(this.textSelectionColor); 
     } else { 
      label.setBackground(this.backgroundNonSelectionColor); 
      label.setForeground(this.textNonSelectionColor); 
     } 
     return label; 
    } 

    private void printSelectionPath(TreePath[] selectionPaths) { 
     System.out.println("\nTreePath:"); 
     for (int i = 0; i < selectionPaths.length; i++) { 
      System.out.println("Selection Path= " + selectionPaths[i]); 
      //TreePath treePath = new TreePath(node.getPath()); 
      // System.out.println("TreePath= " + treePath); 
     } 
} 

Answer 1

これは、DefaultTreeSelectionModelを拡張し、いくつかのメソッドを変更することで実現しました。ここに私の拡張クラスです。

public static class MyTreeSelectionModel extends DefaultTreeSelectionModel { 

    public MyTreeSelectionModel() { 
     super(); 
    } 

    @Override 
    public void removeSelectionPath(TreePath path) { 
     //remove path and its children 
     Object lastPathComponent = path.getLastPathComponent(); 
     ArrayList<TreePath> childPaths = new ArrayList(); 
     if (lastPathComponent instanceof DefaultMutableTreeNode) { 
      DefaultMutableTreeNode dn = (DefaultMutableTreeNode) lastPathComponent; 
      this.getDecendents(dn, childPaths); 
     } else { 
      System.out.println("Not a DefaultMutableTreeNode"); 
     } 
     childPaths.add(path); 
     this.removeSelectionPaths(childPaths.toArray(new TreePath[childPaths.size()])); 
    } 

    @Override 
    public void addSelectionPath(TreePath path) { 
     //add the path and its children 
     Object lastPathComponent = path.getLastPathComponent(); 
     ArrayList<TreePath> childPaths = new ArrayList(); 
     if (lastPathComponent instanceof DefaultMutableTreeNode) { 
      DefaultMutableTreeNode dn = (DefaultMutableTreeNode) lastPathComponent; 
      System.out.println("Last Path Component= " + dn); 
      //get decendents 
      this.getDecendents(dn, childPaths); 
     } else { 
      System.out.println("Not a DefaultMutableTreeNode"); 
     } 
     childPaths.add(path); 
     this.addSelectionPaths(childPaths.toArray(new TreePath[childPaths.size()])); 
     // super.addSelectionPath(path); //To change body of generated methods, choose Tools | Templates. 
    } 

    private void getDecendents(DefaultMutableTreeNode dn, ArrayList<TreePath> childPaths) { 
     Enumeration children = dn.children(); 
     if (children != null) { 
      while (children.hasMoreElements()) { 
       DefaultMutableTreeNode childNode = (DefaultMutableTreeNode) children.nextElement(); 
       System.out.println("Adding " + childNode); 
       TreeNode[] path1 = childNode.getPath(); 
       childPaths.add(new TreePath(path1)); 
       getDecendents(childNode, childPaths); 
      } 
     } 

    } 

}