201009120_Dawning_简单的树形

package com.swing.demo2.Tree; import java.awt.BorderLayout; import java.awt.Component; import java.awt.Image; import java.awt.Rectangle; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.image.ImageObserver; import java.util.Hashtable; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTree; import javax.swing.UIManager; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.DefaultTreeCellRenderer; import javax.swing.tree.DefaultTreeModel; import javax.swing.tree.TreeNode; import javax.swing.tree.TreePath; /*** * 基于Java图形界面开放 简单的树形案例 * * @author Administrator * */ public class AnimatedIconTreeExample extends JFrame { public AnimatedIconTreeExample() { super("AnimatedIconTreeExample"); String[] strs = { "CARNIVORA", // 0 "Felidae", // 1 "Acinonyx jutatus (cheetah)", // 2 "Panthera leo (lion)", // 3 "Canidae", // 4 "Canis lupus (wolf)", // 5 "Lycaon pictus (lycaon)", // 6 "Vulpes Vulpes (fox)" }; // 7 IconNode[] nodes = new IconNode[strs.length]; for (int i = 0; i < strs.length; i++) { nodes[i] = new IconNode(strs[i]); } nodes[0].add(nodes[1]); nodes[0].add(nodes[4]); nodes[1].add(nodes[2]); nodes[1].add(nodes[3]); nodes[4].add(nodes[5]); nodes[4].add(nodes[6]); nodes[4].add(nodes[7]); nodes[2].setIcon(new ImageIcon("title4.gif")); nodes[3].setIcon(new ImageIcon("title4.gif")); nodes[5].setIcon(new ImageIcon("title4.gif")); nodes[6].setIcon(new ImageIcon("title4.gif")); nodes[7].setIcon(new ImageIcon("title4.gif")); JTree tree = new JTree(nodes[0]); tree.setCellRenderer(new IconNodeRenderer()); setImageObserver(tree, nodes); JScrollPane sp = new JScrollPane(tree); getContentPane().add(sp, BorderLayout.CENTER); } private void setImageObserver(JTree tree, IconNode[] nodes) { for (int i = 0; i < nodes.length; i++) { ImageIcon icon = (ImageIcon) nodes[i].getIcon(); if (icon != null) { icon.setImageObserver(new NodeImageObserver(tree, nodes[i])); } } } class NodeImageObserver implements ImageObserver { JTree tree; DefaultTreeModel model; TreeNode node; NodeImageObserver(JTree tree, TreeNode node) { this.tree = tree; this.model = (DefaultTreeModel) tree.getModel(); this.node = node; } public boolean imageUpdate(Image img, int flags, int x, int y, int w, int h) { if ((flags & (FRAMEBITS | ALLBITS)) != 0) { TreePath path = new TreePath(model.getPathToRoot(node)); Rectangle rect = tree.getPathBounds(path); if (rect != null) { tree.repaint(rect); } } return (flags & (ALLBITS | ABORT)) == 0; } } public static void main(String args[]) { try { UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); } catch (Exception evt) {} AnimatedIconTreeExample frame = new AnimatedIconTreeExample(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); frame.setSize(280, 200); frame.setVisible(true); } } class IconNodeRenderer extends DefaultTreeCellRenderer { public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) { super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus); Icon icon = ((IconNode) value).getIcon(); if (icon == null) { Hashtable icons = (Hashtable) tree.getClientProperty("title4.gif"); String name = ((IconNode) value).getIconName(); if ((icons != null) && (name != null)) { icon = (Icon) icons.get(name); if (icon != null) { setIcon(icon); } } } else { setIcon(icon); } return this; } } class IconNode extends DefaultMutableTreeNode { protected Icon icon; protected String iconName; public IconNode() { this(null); } public IconNode(Object userObject) { this(userObject, true, null); } public IconNode(Object userObject, boolean allowsChildren, Icon icon) { super(userObject, allowsChildren); this.icon = icon; } public void setIcon(Icon icon) { this.icon = icon; } public Icon getIcon() { return icon; } public String getIconName() { if (iconName != null) { return iconName; } else { String str = userObject.toString(); int index = str.lastIndexOf("."); if (index != -1) { return str.substring(++index); } else { return null; } } } public void setIconName(String name) { iconName = name; } }