JTree.getModel().addTreeModelListener(new TreeModelListener()) : 表 « 图形用户界面






import java.awt.Dimension;

import java.awt.FlowLayout;



import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTree;

import javax.swing.event.TreeExpansionEvent;

import javax.swing.event.TreeExpansionListener;

import javax.swing.event.TreeModelEvent;

import javax.swing.event.TreeModelListener;

import javax.swing.event.TreeSelectionEvent;

import javax.swing.event.TreeSelectionListener;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.TreePath;

import javax.swing.tree.TreeSelectionModel;



public class Main {

  public static void main(String args[]) {

    JFrame f = new JFrame("JTree Demo");

    f.setSize(260, 240);

    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);



    DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");

    DefaultMutableTreeNode aNode = new DefaultMutableTreeNode("A");

    root.add(aNode);



    DefaultMutableTreeNode bNode = new DefaultMutableTreeNode("B");

    aNode.add(bNode);



    DefaultMutableTreeNode cNode = new DefaultMutableTreeNode("C");

    aNode.add(cNode);



    cNode.add(new DefaultMutableTreeNode("D"));

    cNode.add(new DefaultMutableTreeNode("E"));



    DefaultMutableTreeNode fNode = new DefaultMutableTreeNode("F");

    root.add(fNode);



    DefaultMutableTreeNode gNode = new DefaultMutableTreeNode("G");

    fNode.add(gNode);

    fNode.add(new DefaultMutableTreeNode("H"));

    gNode.add(new DefaultMutableTreeNode("I"));



    JTree jtree = new JTree(root);

    jtree.setEditable(true);



    TreeSelectionModel tsm = jtree.getSelectionModel();

    tsm.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);



    jtree.addTreeExpansionListener(new TreeExpansionListener() {

      public void treeExpanded(TreeExpansionEvent tee) {

        TreePath tp = tee.getPath();

        System.out.println("Expansion: " + tp.getLastPathComponent());

      }



      public void treeCollapsed(TreeExpansionEvent tee) {

        TreePath tp = tee.getPath();

        System.out.println("Collapse: " + tp.getLastPathComponent());

      }

    });



    jtree.addTreeSelectionListener(new TreeSelectionListener() {

      public void valueChanged(TreeSelectionEvent tse) {

        TreePath tp = tse.getPath();

        System.out.println("Selection event: " + tp.getLastPathComponent());

      }

    });



    jtree.getModel().addTreeModelListener(new TreeModelListener() {

      public void treeNodesChanged(TreeModelEvent tme) {

        TreePath tp = tme.getTreePath();

        Object[] children = tme.getChildren();

        DefaultMutableTreeNode changedNode;

        if (children != null)

          changedNode = (DefaultMutableTreeNode) children[0];

        else

          changedNode = (DefaultMutableTreeNode) tp.getLastPathComponent();



        System.out.println("Model change path: " + tp + "New data: "

            + changedNode.getUserObject());



      }



      public void treeNodesInserted(TreeModelEvent tme) {

      }



      public void treeNodesRemoved(TreeModelEvent tme) {

      }



      public void treeStructureChanged(TreeModelEvent tme) {

      }

    });



    f.add(new JScrollPane(jtree));

    f.setVisible(true);

  }

}
JTree.getModel().addTreeModelListener(new TreeModelListener()) : 表 « 图形用户界面 « Java
