Build a tree and customize its icons : Tree « Swing JFC


  

/*

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);

  }

}
Build a tree and customize its icons : Tree « Swing JFC « Java
