Java Tutorial/Swing/JDesktopPane

Adding Internal Frames to a JDesktopPane

The JDesktopPane doesn"t implement RootPaneContainer.

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; public class AddingInternalFramestoaJDesktopPane {

 public static void main(final String[] args) {
   JFrame frame = new JFrame();
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JDesktopPane desktop = new JDesktopPane();
   JInternalFrame internalFrame = new JInternalFrame("Can Do All", true, true, true, true);
   desktop.add(internalFrame);
   internalFrame.setBounds(25, 25, 200, 100);
   JLabel label = new JLabel(internalFrame.getTitle(), JLabel.CENTER);
   internalFrame.add(label, BorderLayout.CENTER);
   internalFrame.setVisible(true);
   frame.add(desktop, BorderLayout.CENTER);
   frame.setSize(500, 300);
   frame.setVisible(true);
 }

}</source>

Create a virtual desktop in your application

   <source lang="java">

import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; public class Main extends JFrame {

 public Main() {
   JMenuBar bar = new JMenuBar();
   JMenu addMenu = new JMenu("Add");
   JMenuItem newFrame = new JMenuItem("Internal Frame");
   addMenu.add(newFrame);
   bar.add(addMenu);
   setJMenuBar(bar);
   final JDesktopPane theDesktop = new JDesktopPane();
   getContentPane().add(theDesktop);
   newFrame.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       JInternalFrame frame = new JInternalFrame("Internal Frame", true, true, true, true);
       Container c = frame.getContentPane();
       MyJPanel panel = new MyJPanel();
       c.add(panel, BorderLayout.CENTER);
       frame.setSize(200,200);
       frame.setOpaque(true);
       theDesktop.add(frame);
     }
   });
   setSize(500, 400);
   setVisible(true);
 }
 public static void main(String args[]) {
   Main app = new Main();
 }

} class MyJPanel extends JPanel {

 public MyJPanel() {
   add(new JLabel("adf"));
 }

}</source>

Creating a JDesktopPane Container

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JTextArea; public class Main {

 public static void main(String[] argv) throws Exception {
   boolean resizable = true;
   boolean closeable = true;
   boolean maximizable = true;
   boolean iconifiable = true;
   String title = "Frame Title";
   JInternalFrame iframe = new JInternalFrame(title, resizable, closeable, maximizable,
       iconifiable);
   iframe.setSize(300, 300);
   iframe.setVisible(true);
   iframe.getContentPane().add(new JTextArea());
   JDesktopPane desktop = new JDesktopPane();
   desktop.add(iframe);
   JFrame frame = new JFrame();
   frame.getContentPane().add(desktop, BorderLayout.CENTER);
   frame.setSize(300, 300);
   frame.setVisible(true);
 }

}</source>

Customizing a JDesktopPane Look and Feel

Property StringObject TypedesktopColorDesktop.ancestorInputMapInputMapDesktop.backgroundColorDesktop.windowBindingsObject[ ]DesktopPane.actionMapActionMapDesktopPaneUIString

extends JDesktopPane implements Scrollable

   <source lang="java">

import java.awt.Dimension; import java.awt.Rectangle; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.Scrollable; class ScrollDesktop extends JDesktopPane implements Scrollable {

 public Dimension getPreferredScrollableViewportSize() {
   return getPreferredSize();
 }
 public int getScrollableUnitIncrement(Rectangle r, int axis, int dir) {
   return 50;
 }
 public int getScrollableBlockIncrement(Rectangle r, int axis, int dir) {
   return 200;
 }
 public boolean getScrollableTracksViewportWidth() {
   return false;
 }
 public boolean getScrollableTracksViewportHeight() {
   return false;
 }

} public class Main extends JFrame {

 public Main() {
   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JDesktopPane desk = new ScrollDesktop();
   desk.setPreferredSize(new Dimension(1000, 1000));
   getContentPane().add(new JScrollPane(desk), "Center");
   JInternalFrame f1 = new JInternalFrame("Frame 1");
   f1.getContentPane().add(new JLabel("This is frame f1"));
   f1.setResizable(true);
   f1.pack();
   f1.setVisible(true);
   desk.add(f1, new Integer(10));
   JInternalFrame f2 = new JInternalFrame("Frame 2");
   f2.getContentPane().add(new JLabel("Content for f2"));
   f2.setResizable(true);
   f2.pack();
   f2.setVisible(true);
   desk.add(f2, new Integer(20));
   JInternalFrame f3 = new JInternalFrame("Frame 3");
   f3.getContentPane().add(new JLabel("Content for f3"));
   f3.setResizable(true);
   f3.pack();
   f3.setVisible(true);
   desk.add(f3, new Integer(20));
   f3.toFront();
   try {
     f3.setSelected(true);
   } catch (java.beans.PropertyVetoException ignored) {
   }
   pack();
   setSize(300, 300);
   setVisible(true);
 }
 public static void main(String arg[]) {
   new Main();
 }

}</source>

Getting All Frames in a JDesktopPane Container

   <source lang="java">

import javax.swing.JDesktopPane; import javax.swing.JInternalFrame; public class Main {

 public static void main(String[] argv) throws Exception {
   JDesktopPane desktop = new JDesktopPane();
   JInternalFrame[] frames = desktop.getAllFrames();
   for (int i = 0; i < frames.length; i++) {
     String title = frames[i].getTitle();
     boolean isVisible = frames[i].isVisible();
     boolean isCloseable = frames[i].isClosable();
     boolean isResizeable = frames[i].isResizable();
     boolean isIconifiable = frames[i].isIconifiable();
     boolean isIcon = frames[i].isIcon();
     boolean isMaximizable = frames[i].isMaximizable();
     boolean isSelected = frames[i].isSelected();
   }
 }

}</source>

JDesktopPane is a specialized JLayeredPane.

The management of the frames within a desktop is the responsibility of a DesktopManager, in which the default implementation that"s provided is DefaultDesktopManager.

JDesktopPane.PALETTE_LAYER

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame;

public class InternalFramePaletteSample {

 public static void main(final String[] args) {
   JFrame frame = new JFrame();
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JDesktopPane desktop = new JDesktopPane();
   
   JInternalFrame palette = new JInternalFrame("Palette", true, false, true, false);
   palette.setBounds(350, 150, 100, 100);
   palette.putClientProperty("JInternalFrame.isPalette", Boolean.TRUE);
   desktop.add(palette, JDesktopPane.PALETTE_LAYER);
   palette.setVisible(true);
   
   frame.add(desktop, BorderLayout.CENTER);
   frame.setSize(500, 300);
   frame.setVisible(true);
 }

}</source>