frames within applet

[karan, chopra]

hi all,
i wish that if i click a particular point in my applet then a small frame window should popup on the screen with the applet always being there in the background.how do i go about solving it?
thanks in advance
regards
karan

[Nathan Pruett]

Here's some code that should help you out...

It shows how to add a frame to an applet, and how to launch that frame when a certain area on the applet is pressed.

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
 
public class FrameApplet extends Applet
{
    Frame f;
 
    public void init()
    {
        addMouseListener( new ClickHandler() );
        f = new Frame( "Applet frame" );
        f.setSize( 300, 300 );
        f.addWindowListener( new WindowHandler() );
    }
 
    public void paint( Graphics g )
    {
        g.setColor( Color.red );
        g.fillRect( 50, 50, 50, 50 );
    }
 
    private class WindowHandler extends WindowAdapter
    {
        public void windowClosing( WindowEvent e )
        {
            f.setVisible( false );
        }
    }
 
    private class ClickHandler extends MouseAdapter
    {
        public void mousePressed( MouseEvent e )
        {
            if( e.getX() > 50 && e.getX() < 100 &&
                e.getY() > 50 && e.getY() < 100 )
            {
                f.setVisible( true );
            }
        }
    }
}

HTH,
-Nate

[karan, chopra]

thanks for the reply nathan,i actually figured it out earlier in the weekend.now i am able to do what i wanted to do,ie,display a frame on clicking certain area in the applet but now my problem is that i want to display something in the frame based on the region of the applet that has been clicked,ie,for different clicked area i will have something different written on the frame.for this i have to get the applet and the frame class communicate with each other(i have 2 classes,one for applet and one for frame).can u give me some idea as to how to get this done.i will appreciate it.
regards
karan

[Nathan Pruett]

You could give the Frame a CardLayout, and have a different "card" display based on where you clicked. You could also have several seperate frames, and which one is launched depends on where the user clicked. I personally think that the first solution is a better one...

Here is a slightly modified version of the code above that may help you out...

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
 
public class FrameApplet extends Applet
{
    Frame f;
    CardLayout cl;
 
    public void init()
    {
        addMouseListener( new ClickHandler() );
        f = new Frame( "Applet frame" );
        cl = new CardLayout();
        f.setLayout( cl );
        Label l1 = new Label( "ONE" );
        Label l2 = new Label( "TWO" );
        f.add( l1, "1" );
        f.add( l2, "2" );
        f.setLayout( cl );
        f.setSize( 300, 300 );
        f.addWindowListener( new WindowHandler() );
    }
 
    public void paint( Graphics g )
    {
        g.setColor( Color.red );
        g.fillRect( 50, 50, 50, 50 );
        g.setColor( Color.green );
        g.fillRect( 20, 30, 10, 10 );
    }
 
    private class WindowHandler extends WindowAdapter
    {
        public void windowClosing( WindowEvent e )
        {
            f.setVisible( false );
        }
    }
 
    private class ClickHandler extends MouseAdapter
    {
        public void mousePressed( MouseEvent e )
        {
            if( e.getX() > 50 && e.getX() < 100 &&
                e.getY() > 50 && e.getY() < 100 )
            {
                cl.show( f, "1" );
                f.setVisible( true );
            }
            else if( e.getX() > 20 && e.getX() < 30 &&
                     e.getY() > 30 && e.getY() < 40 )
            {
                cl.show( f, "2" );
                f.setVisible( true );
            }
        }
    }
}

HTH,
-Nate

[karan, chopra]

thanks nathan,i did it myself by following a methodology which is kinda similar to what u suggested but with out using any layout managers..
thanks
karan