Mega Code Archive
Build a tree and customize its icons
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/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly
*/
// TestTree4.java
//Another test to see how we can build a tree and customize its icons.
//This example does not affect the icons of other trees.
//
import java.awt.BorderLayout;
import java.util.Hashtable;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
public class TestTree4 extends JFrame {
JTree tree1, tree2;
DefaultTreeModel treeModel;
public TestTree4() {
super("Custom Icon Example");
setSize(350, 450);
setDefaultCloseOperation(EXIT_ON_CLOSE);
// Build the hierarchy of containers & objects
String[] schoolyard = { "School", "Playground", "Parking Lot", "Field" };
String[] mainstreet = { "Grocery", "Shoe Shop", "Five & Dime",
"Post Office" };
String[] highway = { "Gas Station", "Convenience Store" };
String[] housing = { "Victorian_blue", "Faux Colonial",
"Victorian_white" };
String[] housing2 = { "Mission", "Ranch", "Condo" };
Hashtable homeHash = new Hashtable();
homeHash.put("Residential 1", housing);
homeHash.put("Residential 2", housing2);
Hashtable cityHash = new Hashtable();
cityHash.put("School grounds", schoolyard);
cityHash.put("Downtown", mainstreet);
cityHash.put("Highway", highway);
cityHash.put("Housing", homeHash);
Hashtable worldHash = new Hashtable();
worldHash.put("My First VRML World", cityHash);
// Build our tree out of our big hashtable
tree1 = new JTree(worldHash);
tree2 = new JTree(worldHash);
DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree2
.getCellRenderer();
renderer.setClosedIcon(new ImageIcon("door.closed.gif"));
renderer.setOpenIcon(new ImageIcon("door.open.gif"));
renderer.setLeafIcon(new ImageIcon("world.gif"));
JSplitPane pane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, tree1,
tree2);
getContentPane().add(pane, BorderLayout.CENTER);
}
public static void main(String args[]) {
TestTree4 tt = new TestTree4();
tt.setVisible(true);
}
}
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