[resolved] Java get Mouse coordinates

Hello, this is the code I was given to work with. My olny problem is that I am very new to java.

Can some one help and tell me where I would put a MouseListener so I could get the current X-Y co-od's of the point when the mouse is clicked....but only after i load both (left/right) images ?? it would be very helpful.

I think this code is long and complex for a begginner...So it's comming in 2 posts.

Please help and thanks... :confused:

Code:

---

//----------------------------------------------------------
//  UIDDemo1 Code for 3731 User-Interface-Design
//----------------------------------------------------------
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
import javax.imageio.*;

//----- the UIDDemo1 class ----------------------------------------

public class UIDDemo1 extends JFrame {

// ---- GUI components ---------------------------------------

  private JMenuBar  menuBar;
  private JMenu      fileMenu, toolMenu, helpMenu;
  private JMenuItem  openLeftImageItem, openRightImageItem, saveAsItem, exitItem;
  private JMenuItem  overlayItem, featMatchItem, eyeDistItem, moreFunItem;
  private JMenuItem  aboutItem, documentItem, searchItem;
  private JLabel    leftLabel, rightLabel, resultLabel;
  private JTextField leftDisplay, rightDisplay, resultDisplay;
  private String    fileName; 
  private ImagePanel leftImgPanel, rightImgPanel, resultImgPanel;
  private JPanel    leftP, rightP, resultP;
  private JFileChooser  fc;

// ---- constructor for static GUI layout  -----------

  public UIDDemo1 () {
   
    super("UIDDemo1");
    Container c = getContentPane();
    ActionEventHandler eh = new ActionEventHandler();
    fc = new JFileChooser();

    //set up file menu
    fileMenu          = new JMenu("File");
    openLeftImageItem  = new JMenuItem("Open Left Image");
    openRightImageItem = new JMenuItem("Open Right Image");
    saveAsItem        = new JMenuItem("Save As");
    exitItem          = new JMenuItem("Exit");
     
    openLeftImageItem.addActionListener(eh);
    openRightImageItem.addActionListener(eh);
    saveAsItem.addActionListener(eh);
    exitItem.addActionListener( new ActionListener() {
          public void actionPerformed(ActionEvent event) {
              System.exit(0);
          }
        }
    );

    fileMenu.add(openLeftImageItem);
    fileMenu.add(openRightImageItem);
    fileMenu.add(saveAsItem);
    fileMenu.add(exitItem);

    //set up tool menu
    toolMenu      = new JMenu("Tools");   
    overlayItem  = new JMenuItem("Overlay Two Images");
    featMatchItem = new JMenuItem("Feature Matching");
    eyeDistItem = new JMenuItem("Eye Distance");
    moreFunItem  = new JMenuItem("More Functions");
   
    overlayItem.addActionListener(eh);
    featMatchItem.addActionListener(eh);
    eyeDistItem.addActionListener(eh);
    moreFunItem.addActionListener(eh);

    toolMenu.add(overlayItem);
    toolMenu.add(featMatchItem);
    toolMenu.add(eyeDistItem);
    toolMenu.add(moreFunItem);

    //set up help menu
    helpMenu    = new JMenu("Help");
    aboutItem    = new JMenuItem("About 3731 User Interface Design");
    documentItem = new JMenuItem("Documents");
    searchItem  = new JMenuItem("Search Index");

    aboutItem.addActionListener(eh);
    documentItem.addActionListener(eh);
    searchItem.addActionListener(eh);

    helpMenu.add(aboutItem);
    helpMenu.add(documentItem);
    helpMenu.add(searchItem);

    //setup the menu bar
    menuBar = new JMenuBar();
    setJMenuBar(menuBar);

    menuBar.add(fileMenu);
    menuBar.add(toolMenu);
    menuBar.add(helpMenu);

    //set image panels
    leftImgPanel  = new ImagePanel();
    rightImgPanel  = new ImagePanel();
    resultImgPanel = new ImagePanel();

    // labels
    leftLabel  = new JLabel("Left Image", JLabel.CENTER);
    rightLabel  = new JLabel("Right Image", JLabel.CENTER);
    resultLabel = new JLabel("Result", JLabel.CENTER);

    //message display fields
    leftDisplay  = new JTextField(30);
    rightDisplay  = new JTextField(30);
    resultDisplay = new JTextField(30);
    leftDisplay.setEditable(false);
    rightDisplay.setEditable(false);
    resultDisplay.setEditable(false);

    // left panel
    leftP = new JPanel();
    leftP.setLayout(new BorderLayout());
    leftP.add(leftLabel, BorderLayout.NORTH);
    leftP.add(new JScrollPane(leftImgPanel), BorderLayout.CENTER);
    leftP.add(leftDisplay, BorderLayout.SOUTH);
   
    // right panel
    rightP = new JPanel();
    rightP.setLayout(new BorderLayout());
    rightP.add(rightLabel, BorderLayout.NORTH);
    rightP.add(new JScrollPane(rightImgPanel), BorderLayout.CENTER);
    rightP.add(rightDisplay, BorderLayout.SOUTH);

    // result panel
    resultP = new JPanel();
    resultP.setLayout(new BorderLayout());
    resultP.add(resultLabel, BorderLayout.NORTH);
    resultP.add(new JScrollPane(resultImgPanel), BorderLayout.CENTER);
    resultP.add(resultDisplay, BorderLayout.SOUTH);

    //add three panels to the contentPane.
    c.setLayout(new GridLayout(1,3));
    c.add(leftP);
    c.add(rightP);
    c.add(resultP);

  } // end of constructor

// -----------------------------------------------------------
  public static void main(String[] args) {   
    UIDDemo1 demo  = new UIDDemo1();
    demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    demo.setSize(1000, 600);
    demo.setVisible(true);
  }

// ---- inner class for event handling  --------------------------

  private class ActionEventHandler implements ActionListener { 
    public void actionPerformed(ActionEvent e) {     
      if( e.getSource() == openLeftImageItem ) {
          fc.setCurrentDirectory(new File("."));
          int result = fc.showOpenDialog(UIDDemo1.this);
          if (result == JFileChooser.APPROVE_OPTION) {
              fileName = fc.getSelectedFile().getPath();
              System.out.println("fileName=  " + fileName);
              leftImgPanel.setImage(fileName);
          }
      }
      else if( e.getSource() == openRightImageItem ) {
          fc.setCurrentDirectory(new File("."));
          int result = fc.showOpenDialog(UIDDemo1.this);
          if (result == JFileChooser.APPROVE_OPTION) {
              fileName = fc.getSelectedFile().getPath();
              System.out.println("fileName=  " + fileName);
              rightImgPanel.setImage(fileName);
          }
      }
      else if( e.getSource() == saveAsItem) {
          //resultImgPanel.saveImage();
      }
      else if( e.getSource() == overlayItem) {
          double user_ratio1 = 0.5;
          double user_ratio2 = 0.5;
          resultImgPanel.setImage(resultImgPanel.overlay(leftImgPanel.getImage(), user_ratio1, rightImgPanel.getImage(), user_ratio2));
      }
      else if( e.getSource() == featMatchItem) {
          //method();
      }
      else if( e.getSource() == eyeDistItem) {
          JOptionPane.showMessageDialog (UIDDemo1.this,
                                          "ijijmijmpiojmk ",
                                          "UIDDemo1",
                                          JOptionPane.INFORMATION_MESSAGE);
          return; 
      }
      else if( e.getSource() == moreFunItem) {
          //method();
      }
      else if( e.getSource() == aboutItem) {
          JOptionPane.showMessageDialog (UIDDemo1.this,
                                          "This is a demo program for 3731-User-Interface-Design. \n Feel free to add new features. ",
                                          "UIDDemo1",
                                          JOptionPane.INFORMATION_MESSAGE);
          return;
      }
      else if( e.getSource() == documentItem) {
          //method();
      }
      else if( e.getSource() == searchItem) {
          //method();
      }
    }
  } // end of inner class.

} // end of UIDDemo1 class



// -------- A special panel used to show and process images --------------------------

class ImagePanel extends JPanel {

  private BufferedImage currentbufimg; // this is the real image associated with each ImagePanel object.

  // The first time an ImagePanle ojbect is displayed on the window,
  // there is no image --> empty constructor.
  ImagePanel() {
      //System.out.println("empty parameter, doing nothing");
  }

  // Overloaded method setImage(), accepts a string parameter.
  // (1)Create an icon using the fileName.
  // (2)Create a BufferedImage (bufimg) and pass it to setImage method.
  // (3)Inside setImage method, bufimg will be used to update currentbufimg.
  //
  public boolean setImage(String fileName){
        ImageIcon imgicon = new ImageIcon(fileName);
          Image img = imgicon.getImage();
        int width  = img.getWidth(this);
        int height = img.getHeight(this);
      System.out.println("width= "  + width);
      System.out.println("height= " + height);

        if(width == -1 || height == -1)
        return false;

        BufferedImage bufimg    = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D bufimgContext = bufimg.createGraphics();
        bufimgContext.drawImage(img, 0, 0, null);
        setImage(bufimg);

        return true;
  }

---

........more to come.

Code:

---

// (1)Overloaded method, accept a BufferedImage parameter.
  // (2)Update currentbufimg with the passed tembufimg.
  // (3)Show the updated currentbufimg.
  //
  public void setImage(BufferedImage tempbufimg){
        if(tempbufimg==null)
        return;
        this.currentbufimg=tempbufimg;
        Dimension size=new Dimension(tempbufimg.getWidth(this),tempbufimg.getHeight(this));
        setMinimumSize(size);
      setPreferredSize(size);
        repaint();
  }
 
  public void paintComponent(Graphics g){
        super.paintComponent(g);
        if(currentbufimg != null)
        g.drawImage(currentbufimg,0,0,this);
  }

  public BufferedImage getImage() {
      return currentbufimg;
  }

  // overlay method accepts two BufferedImage objects (img1 and img2)
  // and generate a new BufferedImage (img3) by overlaying img1 and img2
  // and return it to the calling method.
  //
  public BufferedImage overlay(BufferedImage img1, double ratio1, BufferedImage img2, double ratio2) {
      int rows = img1.getHeight();
      int cols = img1.getWidth();
        BufferedImage img3 = new BufferedImage(cols, rows, BufferedImage.TYPE_INT_RGB);
     
      WritableRaster wr1 = img1.getRaster();
      WritableRaster wr2 = img2.getRaster();
      WritableRaster wr3 = img3.getRaster();
     
      // 0 for red band, 1 for green band, 2 for blue gand.
      int[] r1 = wr1.getSamples(0,0,cols,rows,0,(int[])null); 
      int[] g1 = wr1.getSamples(0,0,cols,rows,1,(int[])null); 
      int[] b1 = wr1.getSamples(0,0,cols,rows,2,(int[])null);     

      int[] r2 = wr2.getSamples(0,0,cols,rows,0,(int[])null); 
      int[] g2 = wr2.getSamples(0,0,cols,rows,1,(int[])null);
      int[] b2 = wr2.getSamples(0,0,cols,rows,2,(int[])null);

      int[] r3 = wr3.getSamples(0,0,cols,rows,0,(int[])null); 
      int[] g3 = wr3.getSamples(0,0,cols,rows,1,(int[])null); 
      int[] b3 = wr3.getSamples(0,0,cols,rows,2,(int[])null); 

      int k;
      int minI = 100;
      int maxI = 130;
      int minJ = 100;
      int maxJ = 130;
      for(int i=0; i<rows; i++) {
      for(int j=0; j<cols; j++) {
          k = j + i*cols;
          if (minI<i && i<maxI && minJ<j && j<maxJ) {  // draw a red square.
            r3[k] = 255;
            g3[k] = 0;
            b3[k] = 0;
          }
          else {
            r3[k] = (int)(r1[k]*ratio1 + r2[k]*ratio2);
            g3[k] = (int)(g1[k]*ratio1 + g2[k]*ratio2);
            b3[k] = (int)(b1[k]*ratio1 + b2[k]*ratio2);
          }
          if (i==j) {  // draw a diagnoal line.
            r3[k] = 0;
            g3[k] = 255;
            b3[k] = 0;   
          }
      }
      }

      wr3.setSamples(0,0,cols,rows,0,r3);
      wr3.setSamples(0,0,cols,rows,1,g3);
      wr3.setSamples(0,0,cols,rows,2,b3);

      return img3;
  }
}
// end of ImageShowPanel class

---

....I just need to know where i Would put something like

Code:

---

//event handler for gettin co-od's
  private class EventHandler implements MouseListener, MouseMotionListener {
 public void mousePressed(MouseEvent e) {
        int newX = e.getX();
        int newY = e.getY();
      }
}

---

i'm not even sure if thats right, i'm just really looking for some help Thanks for listening. :confused:

I hope this is what you are looking for

Code:

---

    this.addMouseListener( new MouseListener()
    {
      public void mouseClicked ( MouseEvent e )
      {
      }

      public void mousePressed ( MouseEvent e )
      {
        int newX = e.getX() ;
        int newY = e.getY() ;
      }

      public void mouseReleased ( MouseEvent e )
      {
      }

      public void mouseEntered ( MouseEvent e )
      {
      }

      public void mouseExited ( MouseEvent e )
      {
      }

    }
    ) ;
    this.addMouseMotionListener( new MouseMotionListener()
    {
      public void mouseDragged ( MouseEvent e )
      {
      }

      public void mouseMoved ( MouseEvent e )
      {
      }

    }
    ) ;

---

ok thanks for the help...now i put that at the end of my ImagePanel class right ?
...and i would need some where to display the coordinates....like

VB Code:

System.out.println("x=   " + newX);
System.out.println("y=   " + newY);

.....to be able to print them out to the system for now.

p.s...how'd u get colour in your code ?

I'm using FireFox with the VBF extension, provided by NoteMe