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Java Source | 1997-07-13 | 2.9 KB | 98 lines |
- /*
- * Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
- import java.applet.Applet;
- import java.awt.*;
- import java.awt.event.MouseListener;
- import java.awt.event.MouseEvent;
-
- public class MouseDemo extends Applet
- implements MouseListener {
- BlankArea blankArea;
- TextArea textArea;
- static final int maxInt = java.lang.Integer.MAX_VALUE;
-
- public void init() {
- GridBagLayout gridbag = new GridBagLayout();
- GridBagConstraints c = new GridBagConstraints();
- setLayout(gridbag);
-
- c.fill = GridBagConstraints.BOTH;
- c.gridwidth = GridBagConstraints.REMAINDER;
- c.weightx = 1.0;
- c.weighty = 1.0;
-
- c.insets = new Insets(1, 1, 1, 1);
- blankArea = new BlankArea();
- gridbag.setConstraints(blankArea, c);
- add(blankArea);
-
- c.insets = new Insets(0, 0, 0, 0);
- textArea = new TextArea(5, 20);
- textArea.setEditable(false);
- gridbag.setConstraints(textArea, c);
- add(textArea);
-
- //Register for mouse events on blankArea and applet (panel).
- blankArea.addMouseListener(this);
- addMouseListener(this);
- }
-
- public void mousePressed(MouseEvent e) {
- saySomething("Mouse button press", e);
- }
-
- public void mouseReleased(MouseEvent e) {
- saySomething("Mouse button release", e);
- }
-
- public void mouseEntered(MouseEvent e) {
- saySomething("Cursor enter", e);
- }
-
- public void mouseExited(MouseEvent e) {
- saySomething("Cursor exit", e);
- }
-
- public void mouseClicked(MouseEvent e) {
- saySomething("Mouse button click", e);
- }
-
- void saySomething(String eventDescription, MouseEvent e) {
- textArea.append(eventDescription + " detected on "
- + e.getComponent().getClass().getName()
- + ".\n");
- textArea.setCaretPosition(maxInt); //hack to scroll to bottom
- }
- }
-
- class BlankArea extends Canvas {
- Dimension minSize = new Dimension(100, 100);
-
- public Dimension getMinimumSize() {
- return minSize;
- }
-
- public Dimension getPreferredSize() {
- return minSize;
- }
-
- public void paint(Graphics g) {
- Dimension size = getSize();
- g.drawRect(0, 0, size.width - 1, size.height - 1);
- }
- }
-