Mouse events on an image

Hi everyone,
I was wondering whether it is possible to register a MouseMotionListener and a MouseListener object on an Image object to make it respond to mouse clicks
Thanks

Hi standoh1000,
Not on the image self but on its container (*JLabel* as suggested by gimbal2), yes. You should use the [*MouseAdapter*|http://java.sun.com/javase/6/docs/api/java/awt/event/MouseAdapter.html] API if you want to use methods of both MouseMotionListener and MouseListener interfaces.

Similar Messages

How to execute a method on mouse move event on an Image

Hi All,
I want to execute a method on mouse move event or mouse click event to an image.
how can i achieve this?
TIA,
Vishal

I am not sure if commandImageLink or goImageLink solve your requirement.
But as a workaround you can use set of ClientListener and ServerListener with af:image to achieve what you need.
using then you can capture client event and convert that into server event which you can use to call a bean method.
Inside this bean you can call a web service or method binding.
My first link in previous post shows that very well....
OR
http://naive-amseth.blogspot.com/2011/02/calling-methodbindingwebservice-on.html
Amit
Edited by: amseth on Feb 15, 2011 12:25 AM

Trying to create a surface with multiple images with mouse events

novice programmer (for a applet program)
hi trying to create a surface i.e jpanel, canvas, that allows multiple images to be created.
Each object is to contain a image(icon) and a name associated with that particular image. Then each image+label has a mouse event that allows the item to be dragged around the screen.
I have tried creating own class that contains a image and string but I having problems.
I know i can create a labels with icons but having major problems adding mouse events to allow each newly created label object to moved by the users mouse?
if any one has any tips of how to acheive this it would be much appreciated. Thanks in advance.
fraser.

This should set you on the right track:- import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    public class DragTwoSquares extends JApplet implements MouseListener, MouseMotionListener {
       int x1, y1;   // Coords of top-left corner of the red square.
       int x2, y2;   // Coords of top-left corner of the blue square.
       /* Some variables used during dragging */
       boolean dragging;      // Set to true when a drag is in progress.
       boolean dragRedSquare; // True if red square is being dragged, false                              //    if blue square is being dragged.
       int offsetX, offsetY; // Offset of mouse-click coordinates from
                              //   top-left corner of the square that was                           //   clicked.
       JPanel drawSurface;    // This is the panel on which the actual
                              // drawing is done. It is used as the
                              // content pane of the applet. It actually                      // belongs to an anonymous class which is
                              // defined in place in the init() method.
        public void init() {
             // Initialize the applet by putting the squares in a
             // starting position and creating the drawing surface
             // and installing it as the content pane of the applet.
          x1 = 10; // Set up initial positions of the squares.
          y1 = 10;
          x2 = 50;
          y2 = 10;
          drawSurface = new JPanel() {
                    // This anonymous inner class defines the drawing
                    // surface for the applet.
                public void paintComponent(Graphics g) {
                       // Draw the two squares and a black frame
                       // around the panel.
                   super.paintComponent(g); // Fill with background color.
                   g.setColor(Color.red);
                   g.fillRect(x1, y1, 30, 30);
                   g.setColor(Color.blue);
                   g.fillRect(x2, y2, 30, 30);
                   g.setColor(Color.black);
                   g.drawRect(0,0,getSize().width-1,getSize().height-1);
          drawSurface.setBackground(Color.white);
          drawSurface.addMouseListener(this);
          drawSurface.addMouseMotionListener(this);
          setContentPane(drawSurface);
       } // end init();
       public void mousePressed(MouseEvent evt) {
              // Respond when the user presses the mouse on the panel.
              // Check which square the user clicked, if any, and start
              // dragging that square.
          if (dragging) // Exit if a drag is already in progress.
             return;
          int x = evt.getX(); // Location where user clicked.
          int y = evt.getY();
          if (x >= x2 && x < x2+30 && y >= y2 && y < y2+30) {
                 // It's the blue square (which should be checked first,
                 // since it's in front of the red square.)
             dragging = true;
             dragRedSquare = false;
             offsetX = x - x2; // Distance from corner of square to (x,y).
             offsetY = y - y2;
          else if (x >= x1 && x < x1+30 && y >= y1 && y < y1+30) {
                 // It's the red square.
             dragging = true;
             dragRedSquare = true;
             offsetX = x - x1; // Distance from corner of square to (x,y).
             offsetY = y - y1;
       public void mouseReleased(MouseEvent evt) {
              // Dragging stops when user releases the mouse button.
           dragging = false;
       public void mouseDragged(MouseEvent evt) {
               // Respond when the user drags the mouse. If a square is
               // not being dragged, then exit. Otherwise, change the position
               // of the square that is being dragged to match the position
               // of the mouse. Note that the corner of the square is placed
               // in the same position with respect to the mouse that it had
               // when the user started dragging it.
           if (dragging == false)
             return;
           int x = evt.getX();
           int y = evt.getY();
           if (dragRedSquare) { // Move the red square.
              x1 = x - offsetX;
              y1 = y - offsetY;
           else {   // Move the blue square.
              x2 = x - offsetX;
              y2 = y - offsetY;
           drawSurface.repaint();
       public void mouseMoved(MouseEvent evt) { }
       public void mouseClicked(MouseEvent evt) { }
       public void mouseEntered(MouseEvent evt) { }
       public void mouseExited(MouseEvent evt) { }
    } // end class

Opening New Browser window for click event on an image

hi all,
I want someone to help me out solving the problem of opening
a new browser window on the mouse click event of an image or a
button etc.... The new window would contain the datagrid details
from the main window, but in an expanded form. If at all there is a
solution, I even want to know whether there is anyway for sizing
the poped up window,because I dont want the new poped up window to
cover the entire screen.
For getting better idea of my problem, the best example I
could give is the popup window that appears when we click on the
preview button while posting the message to the forum.
Someone please do help me out in this regard.
Thanks,
amar.

I'd definitely try to use a Flex popup... but the
flash.net.navigateToURL method is a simple way to open a popup
window in a new browser. You can pass any data needed by the new
page using the URLRequest and/or URLVariables. The URL you navigate
to could, of course, be another Flex application if necessary. I
use this only when I need to open a popup window on another site,
or an HTML formatter report or something similar.
Concerning yourself with the size of the popup window may be
a bad design choice also. I, for example, have my browser
configured to open all popups in a new tab regardless of sizing
constraints imposed by the designer. If it is absolutely necessary
for you to have control over the size of your popup window, you
should follow the advice given by others and use a Flex
popup.

DISABLE MOUSE EVENT on jlabel

Dear all,
I have a jlabel on which i perform a click and the embbeded image switch between start and stop image.
My problem consists in preventing from performing multiples click/or disabling mouse event while the application starts loading some parameters.
switchViewLabel.addMouseListener(new MouseAdapter() {
               public void mouseClicked(MouseEvent e) {
                    //it takes a long time
                               onSwitchViewButtonClick();
protected void onSwitchViewButtonClick() {
          System.out.println("onSwitchViewButtonClick");
          if (canGo) {
               System.out.println("canGo");
               canGo = false;
               MainWindowPeer.getInstance().setCursorToWait();
                     //this action load parameter
                        CommandWindow.getInstance().switchView();
                     refreshSwitchViewButton();
               MainWindowPeer.getInstance().setCursorToDefault();
               canGo = true;
     } But on my console i have noticed :
canGo
onSwitchViewButtonClick
canGo
onSwitchViewButtonClick
canGo.....
It looks like we store mouse event anywhere and for each event we execute onSwitchViewButtonClick code and consume event.(it seems to not be asynchronous)....
How to do ???
Thanks for any helps..

Dear all,
yes i want to ignore mouse events until the processing is done.But how to perform process in separate thread and what is a semaphore.Is it possible to have much more explanation...
Shall i do following code..
mouseAdapter = new MouseAdapter() {
               public void mouseClicked(MouseEvent e) {
                    SwingUtilities.invokeLater(new Runnable(){
                         public void run() {
                              //switchViewLabel.removeMouseListener(mouseAdapter);
                              onSwitchViewButtonClick();
                              //switchViewLabel.addMouseListener(mouseAdapter);
          };Thanks you in advance...

Swing Mouse Event Propagation

Hello,
I'm developing my first Swing application.
One of the components is a thumbnail image panel (ext. JPanel) containing several other components (mostly ext. JLabel). I have the image panel receiving mouse events so as to allow the user to see when the image panel is 'in focus' (rollover effect basically) and to allow the image panel to be selected by clicking.
I added a tooltip to one of the contained labels, and it now 'consumes' my mouse enter/exit event so that now it is as if the label is not part of it's container. This is not what I want.
Is there not some simple way to allow mouse events to be listened for by a child component but yet to 'fall through' to a listener in the parent component?
Any insight into this little problem would be most appreciated.
Thanks.

You can listen to all MouseEvents generated:
Toolkit.getDefaultToolkit().addAWTEventListener( new AWTEventListener()
public void eventDispatched(AWTEvent e)
System.out.println(e);
}, AWTEvent.MOUSE_MOTION_EVENT_MASK + AWTEvent.MOUSE_EVENT_MASK);You would then need to determine if the source component is a descendent of your main panel.

Can i capture the the mouse events

i am writting application in which i have to send the screen image to client as well as mouse events and keyboard events. i am successfull in doing screen image but mouse events are not traped
please send me any suggestion about how i will do it.
[email protected]

Have you tried to implement MouseListener?

How to deal with the mouse events when the thread is running

Hi everybody,
I have a problem with my program.
Now I want to present a picture for some time in the Canvas,then automatically clear the screen, but when the user press the mousebutton or keybutton, I want to stop the thread and clear the screen.
How can I receive the mouse event when the thread is running?
Thanks,

I use my code in a GUI applet.
I try to use the code tag, it's the first time.
               Image im=sd.getStimulus(obj);
               if(pos==null){
                    g.drawImage(im, (w-im.getWidth(null))/2,(h-im.getHeight(null))/2,null);
               }else{
                    g.drawImage(im, pos.x,pos.y,pos.w,pos.h,null);
               try{
                    sleep(showtime);
//                    Thread.sleep(showtime);
               }catch(InterruptedException e){}
               if(pos==null){
                    g.clearRect((w-im.getWidth(null))/2,(h-im.getHeight(null))/2,im.getWidth(null),im.getHeight(null));
               }else{
                    g.clearRect(pos.x,pos.y, pos.w, pos.h);
               }

Accepting a mouse event within button's border

Ive created a custom round button, which is made of GIF images. The images have transparent background's created using Photoshop, so that they appear round. I was wondering if there is a way of accepting a mouse event, for example a click, from only within the actual button's border. It currently accepts mouse events from within the transparent background as well as the actual button's border. Any ideas?

I believe you have to override the contains(...) method of your component. The article for the Tech Tips Archive gives an example:
http://developer.java.sun.com/developer/TechTips/1999/tt0826.html

How can I disable any mouse event while is another is processing?

Hi!
I've a problem and I need some help.
I'm downloading an image in the MouseAdapter's mouseClicked method. So I need to disable any other mouse events produced durring this download. These events can be removed from the queue or is there is any way to disable entering mouse events to the queue while another one is processing?
If anyone can halp me, thanks a lot.

Interesting situation. I would suggest that the downloading be done on another thread; long processes shouldn't be handled on the swing thread in most situations. Then to stop the mouse events you'd simply disable the component that has the mouse listener until the image has finished loading. That way these events will be processed and discarded while the image is loading.
ie,
public void mouseClicked(MouseEvent e)
final Component source = (Component)e.getSource;
source.setEnabled(false); //stop further mouse events.
new Thread()
      public void run()
         loadImage(); //should not return until image is loaded
         source.setEnabled(true);
}Hope that helps. :)

Mouse events don't work on a button from a panel ran in a DLL

Hi.
I have a DLL that loads a panel.
Since it's a DLL I can't do the RunUserInterface() function, because the DLL would be stuck waiting for the panel events.
I only do the LoadPanel().
When I click with the mouse on one of the buttons, the pushing down event (simulating the button being pressed) doesn't happen and the callback doesn't run.
But if I press the tab button until the focus reaches the button and press Enter, the callback of the button is executed.
An even more interesting aspect is that this happens when I call the DLL on TestStand, but on an application of mine that calls the DLL just for debug everything works fine.
How can I enable the mouse events?
Thanks for your help.
Daniel Coelho
VISToolkit - http://www.vistoolkit.com - Your Real Virtual Instrument Solution
Controlar - Electronica Industrial e Sistemas, Lda
Solved!
Go to Solution.

Hello Daniel,
I got surprised when I read your post, because I am experiencing something almost the same as you do.
I have a DLL (generated by an .fp instrument driver I wrote) which performs continious TCP communication with the UUT.
It starts 2 threads, each for reading from one of the 2 different IPs the UUT has.
Another DLL tests this UUT (with the help of the communication DLL above) by exporting functions to be called by TestStand steps.
If the second DLL wants to display a CVI panel in order to wait for the user response or displays a popup (MessagePopup, ConfirmPopup, etc), user cannot press the buttons.
Actually, there is a point your program and mine differ. I call RunUserInterface and the button's callbacks call QuitUserInterface, so the execution continues after a button is pressed. The problem is buttons cannot be pressed. I also tried looping on GetUserEvent but it did not solve the problem.
There are 2 findings:
1. I had a small exe to test my instrument driver DLL and the popups in it worked pretty well (this coincides with Daniel's findings).
2. We workedaround the problem by shutting down the communication threads in the instrument driver DLL before the popup appears and restrating them afterwards. Although they are separate threads in another DLL, they were somehow blocking user events on another DLL running.
S. Eren BALCI
www.aselsan.com.tr

Mouse Events are slow

Hello everyone,
I'm currently working on an standard as3 (1024x768) app that
is running inside a chromeless Air window to take advantage of the
transparency.
All my tests where done using windows XP professional and AIR
1.0 (the same problem existed in beta3).
The issue I'm having is related with Mouse Events. Somehow
the events take a lot of time to reach the swf file when the user
clicks inside the transparent window.
It's natural that the app runs slower inside a transparent
window (the framerate drops) but I wasn't expecting the clicks to
suffer from such delay (it takes sometimes 2-5sec).
The app is very CPU intensive and the transparencies make it
worse. Something inside the AIR framework is not dispatching the
events properly.
I say this because I tried using the virtualMouse class from
senocular together with a socket to simulate the mouse clicks and
that did the trick.
In conclusion:
Something in the AIR framework for windows XP is messing up
the dispatch of the Mouse events when the app is under heavy cpu
usage inside a chromeless window. I click on the window and it
takes 1-2sec to receive the click event.
However when I dispatch the MouseEvent.CLICK myself using
the virtual mouse class the application immediately receives the
event.
I know this is a strange bug and not many people will have
this problem, but I would like to know from someone with knowledge
of the runtime why this could be happening.
Thank you
Tiago Bilou

Hello everyone,
I'm currently working on an standard as3 (1024x768) app that
is running inside a chromeless Air window to take advantage of the
transparency.
All my tests where done using windows XP professional and AIR
1.0 (the same problem existed in beta3).
The issue I'm having is related with Mouse Events. Somehow
the events take a lot of time to reach the swf file when the user
clicks inside the transparent window.
It's natural that the app runs slower inside a transparent
window (the framerate drops) but I wasn't expecting the clicks to
suffer from such delay (it takes sometimes 2-5sec).
The app is very CPU intensive and the transparencies make it
worse. Something inside the AIR framework is not dispatching the
events properly.
I say this because I tried using the virtualMouse class from
senocular together with a socket to simulate the mouse clicks and
that did the trick.
In conclusion:
Something in the AIR framework for windows XP is messing up
the dispatch of the Mouse events when the app is under heavy cpu
usage inside a chromeless window. I click on the window and it
takes 1-2sec to receive the click event.
However when I dispatch the MouseEvent.CLICK myself using
the virtual mouse class the application immediately receives the
event.
I know this is a strange bug and not many people will have
this problem, but I would like to know from someone with knowledge
of the runtime why this could be happening.
Thank you
Tiago Bilou

Firefox mouse event not behaving the same on PC and Mac computers

I use the FCKEditor and having a very strange problem. When I click on the FCKEditor's editing area, the keyboard gets disabled untill I click the mouse somewhere outside of the editing window. The problem only happen on Firefox (3.6.10) on Mac computer (Snowleopard 10.6.4). Doing exactly the same steps on PC works without any problem.
What I want to know:
- Is it possible that the Firefox on Mac is different than the PC in handling mouse events? Or some other areas?

Sounds more that Firefox is treating that editor area as read-only.
Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]

Non modal PopUpManager blocking mouse events

In our application we have a header, footer and center area. We have a situation where we want to block the header and center area with a popup, but leave the footer area so it can be clicked on. The code works fine and it all looks good, except the mouse events are blocked to the footer. If we slightly resize the window (either with the mouse or programatically) it all "wakes up" and starts working. I have tried all sorts of invalidateDisplayList, validateDisplayList, validateNow, etc. I am throwing this out there to see if anyone else has had this problem and if there is something I am missing. I can't easily share my code, but if I don't get a reply I'll put together a code example to see if I can recreate it. Any ideas are very welcome. Been scratching my head at this one for 3 days now.

I should point out that we are using "false" for the modal flag, just in case anyone was thinking that. It all works fine once it "wakes up" through resizing, but I need to make that happen without the resizing.
And we have tried all sorts of "callLater" behavior in conjuction with the invalidate/validate calls.

Mouse events during Thread.sleep

hi.
I have an applet .
I have a alghoritm simulator.
Everytime I find a solution I call the method Thread.sleep .
I want to pause the application and I create a JToggleButton Pause .
When I press the Pause during sleep mouse event are managed at the end of alghoritm.
How can I manage mouse events during sleep?

All UI events (such as mouse events) occur on the event dispatch thread (EDT).
That means if you sleep on the EDT, you lock up the UI. For this reason, you shouldn't be sleeping on the EDT.
I'm not sure what your sleep is trying to do but you need to manage your threads a little more carefully. For instance, any time consuming process which is invoked as a result of a UI event needs to be fired on a new thread to prevent the UI freezing. The fun starts when you have to update the UI as a result of that process, because you should then hook back onto the EDT to avoid the risk of deadlock.
Some utility classes are provided, such as SwingUtilities, and other example code is provided on Sun's site, such as SwingWorker - but if you do much UI work you'll probably end up with your own core set of threading tools and so on to make life easier.

Mouse events on an image

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