Java examples for Swing:Event
Handle Internal Frame Event
/*/*from www . j a va 2 s .c o m*/ * InternalFrameEventDemo.java requires no other files. */ import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; public class InternalFrameEventDemo extends JFrame implements InternalFrameListener, ActionListener { JTextArea display; JDesktopPane desktop; JInternalFrame displayWindow; JInternalFrame listenedToWindow; static final String SHOW = "show"; static final String CLEAR = "clear"; String newline = "\n"; static final int desktopWidth = 500; static final int desktopHeight = 300; public InternalFrameEventDemo(String title) { super(title); //Set up the GUI. desktop = new JDesktopPane(); desktop.putClientProperty("JDesktopPane.dragMode", "outline"); //Because we use pack, it's not enough to call setSize. //We must set the desktop's preferred size. desktop.setPreferredSize(new Dimension(desktopWidth, desktopHeight)); setContentPane(desktop); createDisplayWindow(); desktop.add(displayWindow); //DON'T FORGET THIS!!! Dimension displaySize = displayWindow.getSize(); displayWindow.setSize(desktopWidth, displaySize.height); } //Create the window that displays event information. protected void createDisplayWindow() { JButton b1 = new JButton("Show internal frame"); b1.setActionCommand(SHOW); b1.addActionListener(this); JButton b2 = new JButton("Clear event info"); b2.setActionCommand(CLEAR); b2.addActionListener(this); display = new JTextArea(3, 30); display.setEditable(false); JScrollPane textScroller = new JScrollPane(display); //Have to supply a preferred size, or else the scroll //area will try to stay as large as the text area. textScroller.setPreferredSize(new Dimension(200, 75)); textScroller.setMinimumSize(new Dimension(10, 10)); displayWindow = new JInternalFrame("Event Watcher", true, //resizable false, //not closable false, //not maximizable true); //iconifiable JPanel contentPane = new JPanel(); contentPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10)); contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.PAGE_AXIS)); b1.setAlignmentX(CENTER_ALIGNMENT); contentPane.add(b1); contentPane.add(Box.createRigidArea(new Dimension(0, 5))); contentPane.add(textScroller); contentPane.add(Box.createRigidArea(new Dimension(0, 5))); b2.setAlignmentX(CENTER_ALIGNMENT); contentPane.add(b2); displayWindow.setContentPane(contentPane); displayWindow.pack(); displayWindow.setVisible(true); } public void internalFrameClosing(InternalFrameEvent e) { displayMessage("Internal frame closing", e); } public void internalFrameClosed(InternalFrameEvent e) { displayMessage("Internal frame closed", e); } public void internalFrameOpened(InternalFrameEvent e) { displayMessage("Internal frame opened", e); } public void internalFrameIconified(InternalFrameEvent e) { displayMessage("Internal frame iconified", e); } public void internalFrameDeiconified(InternalFrameEvent e) { displayMessage("Internal frame deiconified", e); } public void internalFrameActivated(InternalFrameEvent e) { displayMessage("Internal frame activated", e); } public void internalFrameDeactivated(InternalFrameEvent e) { displayMessage("Internal frame deactivated", e); } //Add some text to the text area. void displayMessage(String prefix, InternalFrameEvent e) { String s = prefix + ": " + e.getSource(); display.append(s + newline); display.setCaretPosition(display.getDocument().getLength()); } //Handle events on the two buttons. public void actionPerformed(ActionEvent e) { if (SHOW.equals(e.getActionCommand())) { //They clicked the Show button. //Create the internal frame if necessary. if (listenedToWindow == null) { listenedToWindow = new JInternalFrame("Event Generator", true, //resizable true, //closable true, //maximizable true); //iconifiable //We want to reuse the internal frame, so we need to //make it hide (instead of being disposed of, which is //the default) when the user closes it. listenedToWindow .setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE); //Add an internal frame listener so we can see //what internal frame events it generates. listenedToWindow.addInternalFrameListener(this); //And we mustn't forget to add it to the desktop pane! desktop.add(listenedToWindow); //Set its size and location. We'd use pack() to set the size //if the window contained anything. listenedToWindow.setSize(300, 100); listenedToWindow.setLocation(desktopWidth / 2 - listenedToWindow.getWidth() / 2, desktopHeight - listenedToWindow.getHeight()); } //Show the internal frame. listenedToWindow.setVisible(true); } else { //They clicked the Clear button. display.setText(""); } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); //Create and set up the window. JFrame frame = new InternalFrameEventDemo("InternalFrameEventDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } /* * Copyright (c) 1995, 2008, Oracle and/or its affiliates. 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