Search...
FAQs
Subscribe
Pie
FAQs
Recent topics
Flagged topics
Hot topics
Best topics
Search...
Search within Swing / AWT / SWT
Search Coderanch
Advance search
Google search
Register / Login
Post Reply
Bookmark Topic
Watch Topic
New Topic
programming forums
Java
Mobile
Certification
Databases
Caching
Books
Engineering
Micro Controllers
OS
Languages
Paradigms
IDEs
Build Tools
Frameworks
Application Servers
Open Source
This Site
Careers
Other
Pie Elite
all forums
this forum made possible by our volunteer staff, including ...
Marshals:
Campbell Ritchie
Jeanne Boyarsky
Ron McLeod
Paul Clapham
Liutauras Vilda
Sheriffs:
paul wheaton
Rob Spoor
Devaka Cooray
Saloon Keepers:
Stephan van Hulst
Tim Holloway
Carey Brown
Frits Walraven
Tim Moores
Bartenders:
Mikalai Zaikin
Forum:
Swing / AWT / SWT
Help with Jtree
shri mon
Ranch Hand
Posts: 63
posted 18 years ago
Number of slices to send:
Optional 'thank-you' note:
Send
Is it possible to set two different icons for two different leaves in a JTree.
Thanks in advance.
Shrimon
Tad Dicks
Ranch Hand
Posts: 264
posted 18 years ago
Number of slices to send:
Optional 'thank-you' note:
Send
Yes. You need to extend/implement your own TreeCellRenderer.
Craig Wood
Ranch Hand
Posts: 1535
posted 18 years ago
Number of slices to send:
Optional 'thank-you' note:
Send
import java.awt.*; import java.awt.image.BufferedImage; import java.io.*; import java.net.*; import javax.imageio.ImageIO; import javax.swing.*; import javax.swing.tree.*; public class TreeIcons { public TreeIcons() { JTree tree = getTree(getIcons()); tree.setCellRenderer(new CritterRenderer()); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(new JScrollPane(tree)); f.setSize(400,400); f.setLocation(200,200); f.setVisible(true); } private JTree getTree(ImageIcon[] icons) { String[] critters = { "bird", "rabbit" }; int[] indices = { 0, 1, 1, 0, 1, 0, 0, 1 }; DefaultMutableTreeNode root = new DefaultMutableTreeNode( new CritterNode("birds and rabbits", null)); for(int j = 0; j < 2; j++) { DefaultMutableTreeNode node = new DefaultMutableTreeNode( new CritterNode("set " + (j+1), null)); root.add(node); for(int k = 0; k < indices.length/2; k++) { int index = indices[j*indices.length/2 + k]; String s = critters[index]; DefaultMutableTreeNode leaf = new DefaultMutableTreeNode( new CritterNode(s, icons[index])); node.add(leaf); } } return new JTree(new DefaultTreeModel(root)); } private ImageIcon[] getIcons() { String[] fileNames = { "Bird.gif", "Rabbit.gif" }; ImageIcon[] icons = new ImageIcon[fileNames.length]; for(int j = 0; j < icons.length; j++) try { URL url = getClass().getResource("images/" + fileNames[j]); icons[j] = new ImageIcon(ImageIO.read(url)); } catch(MalformedURLException mue) { System.err.println("url: " + mue.getMessage()); } catch(IOException ioe) { System.err.println("read: " + ioe.getMessage()); } return icons; } public static void main(String[] args) { new TreeIcons(); } } class CritterRenderer implements TreeCellRenderer { JLabel label; public CritterRenderer() { label = new JLabel(); } public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { DefaultMutableTreeNode node = (DefaultMutableTreeNode)value; CritterNode cn = (CritterNode)node.getUserObject(); label.setText(cn.text); label.setIcon(cn.icon); return label; } } class CritterNode { String text; ImageIcon icon; public CritterNode(String s, ImageIcon icon) { text = s; this.icon = icon; } }
Consider Paul's
rocket mass heater
.
reply
reply
Bookmark Topic
Watch Topic
New Topic
Boost this thread!
Similar Threads
Help with Jtree
JTree
JTree flicker
JTree and XML
JTree
More...