Graphic java course, Mouse events in Applet [ Part 7 ]

Before going to programming , we need to understand the events used in mouse

1.mouseListener
mouseClicked
mouseEntered
mouseExited
mousePressed
mouseReleased

2.mouseMotionListener
mouseDragged(MouseEvent event)
mouseMoved(MouseEvent event)

For more information goto
http://stackoverflow.com/questions/1798582/difference-between-mouselistener-and-mousemotionlistener-in-java

If we are using mouseListener or mouseMotionListener, then we need to implements all its abstract methodes
If we have only needed one method (, for eg:-mouseClicked  ) then also we must use all abstract methods in programming otherwise we can use actionListener. we can use  actionListener in next tutorial
so that you can understand the events very well

First create a class EventDemo
→just right click on package name "javacourse"→New→Java Class→Name: EventDemo→Click finish

 Now you can see a yellow bulb with red ball on left side→click on it
then you can see



After you click that "implements all abstract methods"
you get like this code

       

import java.applet.Applet;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

/**
 *
 * @author Backtrace
 */
public class EventDemo extends Applet implements MouseListener,MouseMotionListener {

    @Override
    public void mouseClicked(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void mousePressed(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void mouseReleased(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void mouseEntered(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void mouseExited(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void mouseDragged(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void mouseMoved(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    
}
        
    

Now we can use this function to show what you have done with mouse

      showStatus("mouse clicked"+e.getX()+"."+e.getY());

So your code can change like this

       

import java.applet.Applet;
import java.awt.event.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

/**
 *
 * @author Backtrace
 */
public class EventDemo extends Applet implements MouseListener,MouseMotionListener {

    public void init(){
        addMouseListener(this);
        addMouseMotionListener(this);
    }
    @Override
    public void mouseClicked(MouseEvent e) {
      showStatus("mouse clicked "+e.getX()+"."+e.getY());
    }

    @Override
    public void mousePressed(MouseEvent e) {
       showStatus("mouse pressed "+e.getX()+"."+e.getY());
       
    }

    @Override
    public void mouseReleased(MouseEvent e) {
      showStatus("mouse release  "+e.getX()+"."+e.getY());
    }

    @Override
    public void mouseEntered(MouseEvent e) {
     showStatus("mouse entered "+e.getX()+"."+e.getY());  
    }

    @Override
    public void mouseExited(MouseEvent e) {
      showStatus("mouse Exited "+e.getX()+"."+e.getY()); 
    }

    @Override
    public void mouseDragged(MouseEvent e) {
       showStatus("mouse dragged "+e.getX()+"."+e.getY());
    }

    @Override
    public void mouseMoved(MouseEvent e) {
        showStatus("mouse moved "+e.getX()+"."+e.getY());
    }

    
}
        
    

Output
----------------

Posted in: applet,java