[resolved] Java get Mouse coordinates

[jlbovo]

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:

[jlbovo]

//----------------------------------------------------------
// 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.

[jlbovo]

// (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


//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:

[ComputerJy]

I hope this is what you are looking for
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 )
{
}

}
) ;

[jlbovo]

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

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 ?

[ComputerJy]

I'm using FireFox with the VBF extension (http://www.otuscomputing.co.uk/ftp/private/tom/vbf.zip), provided by NoteMe