Make the panel fit the image so MouseListener only invoke when click image

Question

I want to add MouseListener to only the image itself. So I draw the image onto a image panel, add that panel onto the main panel, then add the main panel onto the frame. However, my problem is that the size of my image panel is too large, it take up almost the entire frame. So my mouselistener response not only when I click onto the image, but also anywhere in my image panel. I try to resize the image panel to fit the size of my image, but no luck. Is there a solution for this. I feel like, it got something to do with the layout. Here is my code, if you mind read it. Thank you very much
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.*;
public class ImageRotate
     private static final String LABEL = "MIDI PROTOCOL";
     private JPanel mainPanel = new JPanel();
     private JPanel labelPanel = new JPanel();
     public ImageRotate()
          mainPanel.setOpaque(true);
          mainPanel.setBackground(Color.YELLOW);
          mainPanel.setLayout(new BorderLayout());
          Font labelFont = new Font("serif", Font.BOLD, 30);
          createLabelPanel(LABEL, labelFont);
          labelPanel.setOpaque(false);
          mainPanel.add(labelPanel, BorderLayout.NORTH);
          Drawing d = new Drawing();
          d.setOpaque(true);
          d.addMouseListener(new MouseAdapter(){
               public void mousePressed(MouseEvent e)
                    System.out.println("Pressing on the image");
          d.addMouseMotionListener(new MouseAdapter(){
               public void mouseDragged(MouseEvent e)
                    System.out.println("Dragging the image");
               public void mouseMoved(MouseEvent e)
          mainPanel.add(d, BorderLayout.CENTER);
     private void createLabelPanel(String str, Font font)
          JLabel label = new JLabel(str);
          label.setFont(font);
          label.setForeground(Color.RED);
          labelPanel.add(label);
     public JPanel getPanel()
          return mainPanel;
     public static void main(String args[])
          JFrame frame = new JFrame();
          frame.getContentPane().add(new ImageRotate().getPanel());
          frame.setSize(new Dimension(300, 300));
          frame.setVisible(true);
class Drawing extends JPanel
     Image img;
     public Drawing()
          setSize(new Dimension(100,100));     //Try to make the panel fit the image...NO LUCK
          setBackground(Color.GREEN);     
          img = Toolkit.getDefaultToolkit().createImage("images/nob.gif");
     public void paintComponent(Graphics g)
          super.paintComponent(g);
          Graphics2D g2D = (Graphics2D)g;
          g2D.drawImage(img, 40, 40, this);
}

Answer 1

yunaeyes wrote:
In class Drawing extends JPanel, I did try to to set the panel to the image size but no luck there,
both setSize(new Dimension(100,100)), setPreferredSize(new Dimension(100,100)) does not make the panel smallerIt can be made to work. I find it hard to comment on unseen code.
>
BigDaddyLoveHandles wrote:
I think a better approach is to handle the mouse click properly -- see if the click is over the image or not.Can you elaborate on this?The mousePressed method you posted assumes you are over the image. Check the mouse coordinates! If the component is bigger than the image this may not be so.