Monday, 14 November 2016

HANDLING MOUSE EVENTS



  Listeners are created by using one or more of the interfaces defined by the java.awt.event package.
   Example:
import java.awt.event.*;
import java.applet.*;
import java.awt.*;
public class MyEventApplet extends Applet implements MouseListener, MouseMotionListener
{
 String msg="";
 int x,y;
 public void init()
 {
  x=y=0;
  addMouseListener(this);
  addMouseMotionListener(this);
 }
 public void paint(Graphics g)
 {
  g.drawString(msg,x,y);
 }
 public void mouseClicked(MouseEvent e)
 {
  x=e.getX();
  y=e.getY();
  msg="Mouse Clicked";
 }
 public void mousePressed(MouseEvent e)
 {
  x=e.getX();
  y=e.getY();
  msg="Mouse Pressed";
 }
 public void mouseReleased(MouseEvent e)
 {
  x=e.getX();
  y=e.getY();
  msg="Mouse Released";
 }
 public void mouseMoved(MouseEvent e)
 {
  x=e.getX();
  y=e.getY();
  showStatus("Mouse Moved at "+x+" , "+y);
  repaint();
 }
 public void mouseDragged(MouseEvent e)
 {
  x=e.getX();
  y=e.getY();
  showStatus("Mouse Dragged at "+x+" , "+y);
  repaint();
 }
 public void mouseExited(MouseEvent e)
 {
  x=0;
  y=10;
  msg="Mouse exited";
  repaint();
 }
 public void mouseEntered(MouseEvent e)
 {
  x=0;
  y=10;
  msg="Mouse exited";
  repaint();
 }
} 

OUTPUT:




In the above example, Listener are created for various mouse related events that handles the appropriate event generated by the event.

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