Mouse Event Demo : Mouse « Event « Java






Mouse Event Demo

Mouse Event Demo
   
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 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
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/*
 * MouseEventDemo.java is a 1.4 example that requires the following file:
 * BlankArea.java
 */

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class MouseEventDemo extends JPanel implements MouseListener {
  BlankArea blankArea;

  JTextArea textArea;

  final static String newline = "\n";

  public MouseEventDemo() {
    super(new GridBagLayout());
    GridBagLayout gridbag = (GridBagLayout) getLayout();
    GridBagConstraints c = new GridBagConstraints();

    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(new Color(0.98f, 0.97f, 0.85f));
    gridbag.setConstraints(blankArea, c);
    add(blankArea);

    c.insets = new Insets(0, 0, 0, 0);
    textArea = new JTextArea();
    textArea.setEditable(false);
    JScrollPane scrollPane = new JScrollPane(textArea);
    scrollPane
        .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    scrollPane.setPreferredSize(new Dimension(200, 75));
    gridbag.setConstraints(scrollPane, c);
    add(scrollPane);

    //Register for mouse events on blankArea and the panel.
    blankArea.addMouseListener(this);
    addMouseListener(this);

    setPreferredSize(new Dimension(450, 450));
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
  }

  public void mousePressed(MouseEvent e) {
    saySomething("Mouse pressed (# of clicks: " + e.getClickCount() + ")",
        e);
  }

  public void mouseReleased(MouseEvent e) {
    saySomething("Mouse released (# of clicks: " + e.getClickCount() + ")",
        e);
  }

  public void mouseEntered(MouseEvent e) {
    saySomething("Mouse entered", e);
  }

  public void mouseExited(MouseEvent e) {
    saySomething("Mouse exited", e);
  }

  public void mouseClicked(MouseEvent e) {
    saySomething("Mouse clicked (# of clicks: " + e.getClickCount() + ")",
        e);
  }

  void saySomething(String eventDescription, MouseEvent e) {
    textArea.append(eventDescription + " detected on "
        + e.getComponent().getClass().getName() + "." + newline);
    textArea.setCaretPosition(textArea.getDocument().getLength());
  }

  /**
   * 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 JFrame("MouseEventDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    JComponent newContentPane = new MouseEventDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

    //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();
      }
    });
  }
}

class BlankArea extends JLabel {
  Dimension minSize = new Dimension(100, 100);

  public BlankArea(Color color) {
    setBackground(color);
    setOpaque(true);
    setBorder(BorderFactory.createLineBorder(Color.black));
  }

  public Dimension getMinimumSize() {
    return minSize;
  }

  public Dimension getPreferredSize() {
    return minSize;
  }
}
           
         
    
    
  








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