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jeremybenn |
/* TreeDemo.java -- Demostrates JTree
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.examples.swing;
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import java.awt.BorderLayout;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import javax.swing.ButtonGroup;
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import javax.swing.JButton;
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import javax.swing.JCheckBox;
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import javax.swing.JComponent;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.JPanel;
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import javax.swing.JRadioButton;
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import javax.swing.JScrollPane;
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import javax.swing.JTree;
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import javax.swing.SwingUtilities;
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import javax.swing.event.TreeSelectionEvent;
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import javax.swing.event.TreeSelectionListener;
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import javax.swing.tree.DefaultMutableTreeNode;
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import javax.swing.tree.DefaultTreeModel;
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import javax.swing.tree.DefaultTreeSelectionModel;
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import javax.swing.tree.TreePath;
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public class TreeDemo
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extends JPanel
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implements ActionListener
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{
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TreeDemo()
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{
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super();
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createContent();
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}
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private void createContent()
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{
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// non-leafs
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DefaultMutableTreeNode root = new DefaultMutableTreeNode("Exotic Subsistence");
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DefaultMutableTreeNode fruit = new DefaultMutableTreeNode("Interesting Fruit");
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DefaultMutableTreeNode veg = new DefaultMutableTreeNode("Extraordinary Vegetables");
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DefaultMutableTreeNode liq = new DefaultMutableTreeNode("Peculiar Liquids");
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// leafs
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DefaultMutableTreeNode f1 = new DefaultMutableTreeNode("Abiu");
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DefaultMutableTreeNode f2 = new DefaultMutableTreeNode("Bamboo Shoots");
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DefaultMutableTreeNode f3 = new DefaultMutableTreeNode("Breadfruit");
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DefaultMutableTreeNode f4 = new DefaultMutableTreeNode("Canistel");
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DefaultMutableTreeNode f5 = new DefaultMutableTreeNode("Duku");
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DefaultMutableTreeNode f6 = new DefaultMutableTreeNode("Guava");
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DefaultMutableTreeNode f7 = new DefaultMutableTreeNode("Jakfruit");
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DefaultMutableTreeNode f8 = new DefaultMutableTreeNode("Quaribea");
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DefaultMutableTreeNode v1 = new DefaultMutableTreeNode("Amaranth");
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DefaultMutableTreeNode v2 = new DefaultMutableTreeNode("Kiwano");
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DefaultMutableTreeNode v3 = new DefaultMutableTreeNode("Leeks");
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DefaultMutableTreeNode v4 = new DefaultMutableTreeNode("Luffa");
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DefaultMutableTreeNode v5 = new DefaultMutableTreeNode("Chayote");
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DefaultMutableTreeNode v6 = new DefaultMutableTreeNode("Jicama");
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DefaultMutableTreeNode v7 = new DefaultMutableTreeNode("Okra");
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DefaultMutableTreeNode l1 = new DefaultMutableTreeNode("Alcoholic");
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DefaultMutableTreeNode l11 = new DefaultMutableTreeNode("Caipirinha");
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DefaultMutableTreeNode l21 = new DefaultMutableTreeNode("Mojito");
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DefaultMutableTreeNode l31 = new DefaultMutableTreeNode("Margarita");
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DefaultMutableTreeNode l41 = new DefaultMutableTreeNode("Martini");
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DefaultMutableTreeNode l5 = new DefaultMutableTreeNode("Non Alcoholic");
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DefaultMutableTreeNode l55 = new DefaultMutableTreeNode("Babaji");
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DefaultMutableTreeNode l65 = new DefaultMutableTreeNode("Chikita");
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root.add(fruit);
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root.add(veg);
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root.add(liq);
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fruit.add(f1);
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fruit.add(f2);
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fruit.add(f3);
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fruit.add(f4);
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fruit.add(f5);
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fruit.add(f6);
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fruit.add(f7);
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fruit.add(f8);
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veg.add(v1);
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veg.add(v2);
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veg.add(v3);
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veg.add(v4);
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veg.add(v5);
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veg.add(v6);
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veg.add(v7);
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liq.add(l1);
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l1.add(l11);
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l1.add(l21);
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l1.add(l31);
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l1.add(l41);
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liq.add(l5);
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l5.add(l55);
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l5.add(l65);
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final JTree tree = new JTree(root);
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tree.setLargeModel(true);
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tree.setEditable(true);
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final DefaultTreeSelectionModel selModel = new DefaultTreeSelectionModel();
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selModel.setSelectionMode(
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DefaultTreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
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tree.setSelectionModel(selModel);
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// buttons to add and delete
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JButton add = new JButton("add element");
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add.addActionListener(new ActionListener()
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{
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public void actionPerformed(ActionEvent e)
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{
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for (int i = 0; i < tree.getRowCount(); i++)
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{
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if (tree.isRowSelected(i))
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{
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TreePath p = tree.getPathForRow(i);
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DefaultMutableTreeNode n = (DefaultMutableTreeNode) p.
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getLastPathComponent();
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n.add(new DefaultMutableTreeNode("New Element"));
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// The expansion state of the parent node does not change
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// by default. We will expand it manually, to ensure that the
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// added node is immediately visible.
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tree.expandPath(p);
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// Refresh the tree (.repaint would be not enough both in
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// Classpath and Sun implementations).
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DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
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model.reload(n);
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break;
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}
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}
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}
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});
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// Demonstration of the various selection modes
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final JCheckBox cbSingle = new JCheckBox("single selection");
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cbSingle.addActionListener(new ActionListener()
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{
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public void actionPerformed(ActionEvent e)
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{
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if (cbSingle.isSelected())
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selModel.setSelectionMode(
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DefaultTreeSelectionModel.SINGLE_TREE_SELECTION);
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else
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selModel.setSelectionMode(
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DefaultTreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
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}
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});
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// Demonstration of the root visibility changes
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final JCheckBox cbRoot = new JCheckBox("root");
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cbRoot.addActionListener(new ActionListener()
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{
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public void actionPerformed(ActionEvent e)
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{
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tree.setRootVisible(cbRoot.isSelected());
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}
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});
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cbRoot.setSelected(true);
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// Demonstration of the tree selection listener.
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final JLabel choice = new JLabel("Make a choice");
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tree.getSelectionModel().addTreeSelectionListener(
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new TreeSelectionListener()
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{
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public void valueChanged(TreeSelectionEvent event)
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{
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TreePath was = event.getOldLeadSelectionPath();
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TreePath now = event.getNewLeadSelectionPath();
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String swas =
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was == null ? "none":was.getLastPathComponent().toString();
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String snow =
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now == null ? "none":now.getLastPathComponent().toString();
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choice.setText("From "+swas+" to "+snow);
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}
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}
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);
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setLayout(new BorderLayout());
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JPanel p2 = new JPanel();
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p2.add(add);
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p2.add(cbSingle);
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p2.add(cbRoot);
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tree.getSelectionModel().
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setSelectionMode(DefaultTreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
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// Panel for selecting line style.
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ActionListener l = new ActionListener()
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{
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public void actionPerformed(ActionEvent e)
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{
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JRadioButton b = (JRadioButton) e.getSource();
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tree.putClientProperty("JTree.lineStyle", b.getText());
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tree.repaint();
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}
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};
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JPanel lineStylePanel = new JPanel();
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ButtonGroup buttons = new ButtonGroup();
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lineStylePanel.add(new JLabel("Line style: "));
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JRadioButton none = new JRadioButton("None");
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lineStylePanel.add(none);
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buttons.add(none);
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none.addActionListener(l);
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JRadioButton angled = new JRadioButton("Angled");
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lineStylePanel.add(angled);
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buttons.add(angled);
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angled.addActionListener(l);
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JRadioButton horizontal = new JRadioButton("Horizontal");
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lineStylePanel.add(horizontal);
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buttons.add(horizontal);
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horizontal.addActionListener(l);
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p2.add(lineStylePanel);
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add(p2, BorderLayout.NORTH);
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add(new JScrollPane(tree), BorderLayout.CENTER);
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add(choice, BorderLayout.SOUTH);
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}
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public void actionPerformed(ActionEvent e)
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{
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if (e.getActionCommand().equals("CLOSE"))
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{
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System.exit(0);
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}
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}
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/**
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* When the demo is run independently, the frame is displayed, so we should
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* initialise the content panel (including the demo content and a close
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* button). But when the demo is run as part of the Swing activity board,
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* only the demo content panel is used, the frame itself is never displayed,
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* so we can avoid this step.
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*/
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void initFrameContent()
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{
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JPanel closePanel = new JPanel();
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JButton closeButton = new JButton("Close");
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closeButton.setActionCommand("CLOSE");
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closeButton.addActionListener(this);
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closePanel.add(closeButton);
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add(closePanel, BorderLayout.SOUTH);
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}
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public static void main(String[] args)
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{
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SwingUtilities.invokeLater
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(new Runnable()
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{
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public void run()
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{
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TreeDemo app = new TreeDemo();
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app.initFrameContent();
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JFrame frame = new JFrame("Tree Demo");
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frame.getContentPane().add(app);
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frame.pack();
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frame.setVisible(true);
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}
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});
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}
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/**
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* Returns a DemoFactory that creates a TreeDemo.
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*
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* @return a DemoFactory that creates a TreeDemo
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*/
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public static DemoFactory createDemoFactory()
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{
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return new DemoFactory()
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{
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public JComponent createDemo()
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{
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return new TreeDemo();
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}
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};
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}
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}
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