Regarding restricting mouse motion to a specific JPanel on JFrame

Hello Everybody,
I need to restrict mouse motion to a specfic area on a JFrame. I have no idea how to do that.
Any kind of help will be highly appreciate. I tried to find that on google but could not locate anything that can help me.
Thanks in advance.

So, if you were to be able to do that, which you can't, then how would the user close the frame, or use the menu, or click on the task bar, or whatever?

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Mouse Motion Listener

How can i detect when the mose moves when the mouse is not located on the Frame?
Here is my mouse motion listener
private class EventHandler implements AWTEventListener {
          private JPanel myPanel;
          public EventHandler(JPanel thepanel){
               myPanel = thepanel;
        public void eventDispatched(AWTEvent event) {
            if (event.getID() == MouseEvent.MOUSE_MOVED) {
                 MouseEvent me = (MouseEvent)event;
                 myScreenShooter.setCaptureLocation(me.getX(), me.getY());
                myPanel.repaint();
    }and I register it with a JPanel which I extended
Toolkit.getDefaultToolkit().addAWTEventListener(new EventHandler(this), AWTEvent.MOUSE_MOTION_EVENT_MASK);But the only time the motion is detected is when the mouse is within the panel...I need to know when it is moved anywhere on the screen.
Any ideas?
Thanks

import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import javax.swing.*;
public class MotionTest
    public MotionTest()
        JLabel label = new JLabel();
        label.setHorizontalAlignment(JLabel.CENTER);
        new Monitor(label);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(label);
        f.setSize(300,100);
        f.setLocation(200,200);
        f.setVisible(true);
    public static void main(String[] args)
        new MotionTest();
class Monitor
    JLabel label;
    Point lastLocation;
    boolean continueToMonitor;
    NumberFormat nf;
    public Monitor(JLabel label)
        this.label = label;
        lastLocation = new Point();
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        nf = NumberFormat.getInstance();
        nf.setMaximumFractionDigits(1);
        new Thread(runner).start();
    Runnable runner = new Runnable()
        public void run()
            while(continueToMonitor)
                Point p = MouseInfo.getPointerInfo().getLocation();
                double distance = p.distance(lastLocation);
                if(distance != 0)
                    Toolkit.getDefaultToolkit().beep();
                    label.setText("mouse moved " + nf.format(distance));
                    lastLocation = p;
                else
                    label.setText("mouse still");
                try
                    Thread.sleep(250);
                catch(InterruptedException ie)
                    System.err.println("interrupt: " + ie.getMessage());
}

Mouse Motion Problem

I have a JFrame which I have added a MouseMotion Listener to it, it contains many JPanels with border layout manager. I want to detect a MouseMotion in the whole Frame. But I found that only the menu bar area could fire a MouseMotionEvent when the cursor moves there. There are no mouse motion event be fired when the mouse moves on other area on the Frame. What should I do to make it works? Or should I do anything to those insided JPanels ?

Add your MouseMotionListener to the frame's glass pane. Be sure to set the glass pane visible in order to retrieve the mouse moved events. See attached sample working code.
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class GlassMotion
public static void main(String args[])
    new GlassMotionFrame();
class GlassMotionFrame extends JFrame implements ActionListener
JMenuBar mb = new JMenuBar();
JMenu file = new JMenu("File");
JMenu edit = new JMenu("Edit");
JMenu view = new JMenu("View");
JMenu help = new JMenu("Help");
JSeparator separator = new JSeparator();
JMenuItem fileOpen = new JMenuItem("Open...");
JMenuItem fileSaveAs = new JMenuItem("Save As...");
JMenuItem editCut = new JMenuItem("Cut");
JMenuItem editCopy = new JMenuItem("Copy");
JMenuItem editPaste = new JMenuItem("Paste");
JMenuItem helpAbout = new JMenuItem("About...");
JPanel north = new JPanel();
JPanel south = new JPanel();
JPanel center = new JPanel();
JTextField jtf = new JTextField(20);
JTextArea jta = new JTextArea(20,30);
JScrollPane jsp = new JScrollPane(jta);
JButton ok = new JButton("OK");
GlassMotionFrame()
    super();
    /* Components should be added to the container's content pane */
    Container cp = getContentPane();
    Component glassPane = getGlassPane();
    glassPane.addMouseMotionListener(new MouseMotionAdapter() {
      public void mouseMoved(MouseEvent evt) {
        System.out.println("Mouse motion event!");
    glassPane.setVisible(true);
    north.add(new JLabel("Last Name:"));
    north.add(jtf);
    center.add(jsp);
    south.add(ok);
    cp.add(BorderLayout.NORTH,north);
    cp.add(BorderLayout.CENTER,center);
    cp.add(BorderLayout.SOUTH,south);
    /* Add menu items to menus */
    file.add(fileOpen);
    file.add(separator);
    file.add(fileSaveAs);
    edit.add(editCut);
    edit.add(editCopy);
    edit.add(editPaste);
    help.add(helpAbout);
    /* Add menus to menubar */
    mb.add(file);
    mb.add(edit);
    mb.add(view);
    mb.add(help);
    /* Set menubar */
    setJMenuBar(mb);
    /* Add the action listeners */
    fileOpen.addActionListener(this);
    fileSaveAs.addActionListener(this);
    editCut.addActionListener(this);
    editCopy.addActionListener(this);
    editPaste.addActionListener(this);
    helpAbout.addActionListener(this);
    /* Add the window listener */
    addWindowListener(new WindowAdapter()
      public void windowClosing(WindowEvent evt)
        dispose();
        System.exit(0);
    /* Size the frame */
    pack();
    /* Center the frame */
    Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();
    Rectangle frameDim = getBounds();
    setLocation((screenDim.width - frameDim.width) / 2,(screenDim.height - frameDim.height) / 2);
    /* Show the frame */
    setVisible(true);
public void actionPerformed(ActionEvent evt)
    Object obj = evt.getSource();
    if (obj == fileOpen);
    else if (obj == fileSaveAs);
    else if (obj == editCut);
    else if (obj == editCopy);
    else if (obj == editPaste);
    else if (obj == helpAbout);
}

Mouse motion events

For some reason my custom JComponent or cutom Jpanel do not detect any mouseMotion events. Does anyone know why that is?
I have a class like the following
public class GeometryPanel extends JComponent implements MouseInputListenerin my main class (the frame class) I have the following
         JFrame frame = new JFrame();
     JPanel p = new MyPanel();
     JComponent geometryPanel;
     JComponent buttonPanel = new ButtonPanel(this);
     public MainWindow()
          geometryPanel = new GeometryPanel(this,600, 600);
          setupGUI();
          displayFrame();
     public void setupGUI()
           p.setBackground( Color.white );
          p.setPreferredSize(new Dimension(width, height));
          geometryPanel.setPreferredSize(new Dimension(600, 600));
          buttonPanel.setPreferredSize(new Dimension(620, 80));
           p.add( geometryPanel );
           p.add( buttonPanel );
     public void displayFrame()
           frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setContentPane(p);
          frame.pack();
          frame.setLocationRelativeTo(null);
          frame.show();
     }For some reason all of the mouse pressed events are caught, but not the motion events. They are not fired.

Ah I got it, thank you. Forgot to add the mouse motion listener next to the mouse listner

Restrict display and posting for specific document types

Hi,
Is it possible to restrict display and posting for specific document types? I want to restrict authorization to SM document type in FS10N, and KSB1 tcode. Please help
Best Regards,
KIRAN.

Sandipan Choudhury wrote:
FS10N checks for this object ("Check" in Su24) but when user doesnot has this authorization object he gets access to all doc types and when the user is restricted to specific doc types (object present in user's authorization) he will get access to only those doc types. This is how the authorization check for F_BKPF_BLA works, in other words this authorization is Optional.
Sorry, but this is not true and seems to be an invention of how you would like it to work...
The coding works like this (generally):
    if sy-subrc ne 0.
      select single * from t003 where blart = postab-blart.
      check sy-subrc = 0.
      blrtab-blart = t003-blart.
      blrtab-brgru = t003-brgru.
      append blrtab.
    endif.
    if blrtab-brgru ne space.    "<--- important condition!!
      authority-check object 'F_BKPF_BLA'
           id 'BRGRU' field blrtab-brgru
           id 'ACTVT' field actvt.
      if sy-subrc ne 0.
        rcode = 4.
      endif.
    endif.
endif.
The "optional" aspect is whether or not the document type has an auth group on it in T003, failing which the check is suppressed.
If it reaches the check, then it found something and then checks that selected value.
Moral of the story:
--> Do not believe SU53.
--> Do not make assumptions from ST01 traces.
--> Read the documentation carefully.
--> Read the code to see how it really works (you can jump to the coding location from the trace).
Cheers,
Julius

Confused with Mouse Motion Listener

I'm having a hard time understanding mouse motion listener and mouse listener.
What I know is that it's an interface and it's supposed to be overriden, but what I don't understand is how on earth does each of the methods know what the event just did.
How does method mouseClicked know that the mouse was just clicked and not pressed?
As you can see, well at least to me, there's not telling how given only the passed event. I was expecting something inside the method that would go like:
event.getWhatHappend();something like that then so you can go on with the rest of the code and say that it was actually pressed or clicked.
public void mouseClicked( MouseEvent event )
       statusBar.setText( String.format( "Clicked at [%d, %d]",
        event.getX(), event.getY() ) );
} // end method mouseClicked
// handle event when mouse pressed
public void mousePressed( MouseEvent event )
      statusBar.setText( String.format( "Pressed at [%d, %d]",
      event.getX(), event.getY() ) );
} // end method mousePressed

How does method mouseClicked know that the mouse was just clicked and not pressed?try this example
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
class Testing extends JFrame
public Testing()
    setSize(100,75);
    setLocation(300,200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel p = new JPanel();
    JLabel lbl = new JLabel("Click me");
    lbl.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    p.add(lbl);
    getContentPane().add(p);
    lbl.addMouseListener(new MouseListener(){
      public void mousePressed(MouseEvent me){
        System.out.println("pressed");
      public void mouseClicked(MouseEvent me){
        System.out.println("clicked");
      public void mouseReleased(MouseEvent me){
        System.out.println("released");
      public void mouseEntered(MouseEvent me){
        System.out.println("entered");
      public void mouseExited(MouseEvent me){
        System.out.println("exited");
public static void main(String[] args){new Testing().setVisible(true);}
}what happens is when you add the mouseListener to the label, it is
registered to receive mouse events. There are 5 mouse events, each with a
different event id.
(watch the console for these)
move the mouse inside the label's border, and the mouseEntered event is
sent to registered listeners of the label.
press the mouse button, holding it down, mousePressed is sent.
release the mouse button, mouseReleased is sent.
if the x,y position of mousePressed is the same as that for mouseReleased
a mouseClicked event is fired .
(check by again holding down the mouseButton,then move the mouse
slightly before releasing the button - no mouseClicked event)
move the cursor outside the label, and the mouseExited event is sent.
so, basically, 5 separate events are available to be sent - you select the one/s
you want to handle.

I need help adding a mouse motion listner to my game. PLEASE i need it for

I need help adding a mouse motion listner to my game. PLEASE i need it for a grade.
i have a basic game that shoots target how can use the motion listner so that paint objects (the aim) move with the mouse.
i am able to shoot targets but it jus clicks to them ive been using this:
public void mouse() {
dotX = mouseX;
dotY = mouseY;
int d = Math.abs(dotX - (targetX + 60/2)) + Math.abs(dotY - (targetY + 60/2));
if(d < 15) {
score++;
s1 = "" + score;
else {
score--;
s1 = "" + score;
and here's my cross hairs used for aiming
//lines
page.setStroke(new BasicStroke(1));
page.setColor(Color.green);
page.drawLine(dotX-10,dotY,dotX+10,dotY);
page.drawLine(dotX,dotY-10,dotX,dotY+10);
//cricle
page.setColor(new Color(0,168,0,100));
page.fillOval(dotX-10,dotY-10,20,20);
please can some1 help me

please can some1 help meNot when you triple post a question:
http://forum.java.sun.com/thread.jspa?threadID=5244281
http://forum.java.sun.com/thread.jspa?threadID=5244277

Plz Help! How to control mouse motion(use program to move/click the mouse)?

Hi people, plz give me some help on this: I wanna control mouse motion at another program's window, eg. control mouse movement in Internet Explorer's window. For a particular pixel on the screen, I need to move the mouse onto it instantly, then click. Please note that the java program(no applet) is going to run at the background, the current active window is some other programs like IE, notepad, etc.
Plz give me some clue about how to achieve this, thanks.
Do I need to do this through windows API or it can be done purely in JAVA?
Also, how to calculate the RGB color from a particular pixel on the screen?
Thank you very much for your time, plz help :).

The same question each day (exe) !!!
There are many posts on this point!
All the soft that allows the build a native executable file on Windows
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You can take a look at JET excelsior
http://www.excelsior-usa.com/home.html
Denis

Reg: MouseListener and Mouse Motion Listener Interfaces

Hi,
Good day,
I have added the mouselistener and mouse motion listeners to JButton..... With this i am trying to draw Circle and Line use mouse... When i was drawing at a particular point the actual drawn one is not placed at that point... so where can be error be present..how to overcome it.........
Bye

Insufficient information to find a solution. Please go through these links and respond accordingly.
[How to ask questions the smart way|http://catb.org/~esr/faqs/smart-questions.html]
SSCCE
Use code tags to post codes -- [code]CODE[/code] will display asCODEOr click the CODE button and paste your code between the {code} tags that appear.
db

Detect Key Press and Mouse Motion in ONE event?

Hi
I am trying to create a functionality where a mouse motion from left to right performs one action, and the same motion while a given key is pressed performs another action.
How can i combine the two events? How do I unify the KeyEvent and MouseEvent, particulary when I need to capture the directional motion of the mouse together with the key press?
many thanks for any insight

you cannot actualy combine them into 1 event but there is an easy way around this:boolean mouseKeyPressed = false;
public void keyPressed (KeyEvent e)
if (e.getKeyCode () == ??) \\ or e.isCtrlDown(), e.isAltDown(), ...
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public void keyReleased (KeyEvent e)
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public void mouseMoved (MouseEvent e)
if (mouseKeyPressed)
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}hope this helps,
greetz,
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I would like to know if it is possible to deactivate the event coalescing for mouse events. I refer to the following method found in "java.awt.EventQueue":
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        if (cache == null) {
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        if (index != -1 && cache[index] != null) {
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            return true;
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Other "interesting" methods are:
- java.awt.EventQueue.coalesceEvent(AWTEvent, int)
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But unfortunately, I did not manage to deactivate it.
For some background information: I would like to build a drawing panel for a Tablet-PC application to draw with a digitizer/pen on it. As an optimal goal, it should be as smooth as the Windows 7 handwriting panel (don't know the official name). The trivial implementation is not fast enough - drawing quickly produces too few points (round lines with edges). And I think one reason for this is, that some mouse (motion) events get coalesced/skipped while drawing - hence this request for support.
I'm greateful for any hint you may have
Thanks a lot!

if (whatever) {
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    e.consume()
} else {
    // some usefull, but not EventQeue.push()
} you can consume Key and Mouse events
you have to check JComponentHierarchy because each of JComponent have got implemented KeyBindings (e.g. F2 edit JTable cell ...),

Regarding restricting mouse motion to a specific JPanel on JFrame

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