JPopupMenu responding to extraneous mouse event
Our application shows a popup menu when a user double-clicks on a panel, and sometimes the menu needs to come up over the point that was clicked. When this happens, the menu opens and then immediately closes again. It looks like this is because the menu is actually shown between the first and second clicks, and it is picking up the second click as a selection (of the menu item over the click point). Is there a workaround for this? Any suggestions would be greatly appreciated.
Hi ET,
This option may work for you. You can edit the Configure Event Callbacks.vi to include three extra events, a SequenceFileOpened, SequenceFileClosed, and UserChanged. This will capture when someone hits one of the three buttons and execute the code in the callback VI. You can modify the connector pane of the VI or the bundle for user parameters to include a reference to the control of interest, and pass the reference into the user parameter option so it is available in each callback VI. You can then wire this up to a generic property node to modify the attributes of the control you created the reference for. I have attached a screenshot of the modification of the Configure Event Callbacks VI. I hope this option works for you!
Cheers,
Kelly R.
Applications Engineer
National Instruments
Attachments:
SequenceUserEventCallback.png 23 KB
Similar Messages
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How to make the row header of the JTable respond to mouse events?
Is there an easy way to enable the row header of a JTable so it listens to mouse events? I have put a button in the first cell of the row header but I can't click in it.
I'm asking for an easy way because I've seen some fairly complicated examples on the web that seem close to what I want but I was hoping something simple like getRowHeader().setEnabled(true) would do the trick for my case...What's your row header, another JTable or something else? Check out camickr's [url http://tips4java.wordpress.com/2009/07/12/table-button-column/]Table Button Column.
db
edit Or to get better help sooner, post a [url http://mindprod.com/jgloss/sscce.html]SSCCE (Short, Self Contained, Compilable and Executable) example that demonstrates the problem.
Edited by: Darryl Burke -
hi,
I am having objects on a JFrame that respond to mouse events. I would like to know how I can disable these events. I use the addMouseListener to register a mouse event on something. Is there a way to remove or to deregister mouse events.
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How do I stop button controls responding to both mouse down and mouse up?
Hi,
On my front panel I have several buttons which are all set to 'Switch Until Release' type. I've come across the problem where they sometimes stick on even when the mouse has been released (see earlier posting) and this has been confimed by NI as a LV bug.
To get round this I manually write FALSE to the button controls once my LV prog has read them but I now find that some of the buttons having been cleared go true again on the release of the mouse button as though the mouse release can also set them true.
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Thanks,
Dave.Dave123 wrote:
I'd like to use latch when released buttons but I'm using local variables of the buttons so I can read the current values of them in different parts of the program.
So to simulate latch when released I've written my program to set to FALSE the state of the button once it has read that it has been pressed.
This sounds like a very bad idea if other parts of the code need to react on the state of a pseudo-latch action boolean. There is simply no guarantee that other parts of the code even see the transition due to possible race conditions. What if the boolean gets reset before the other code can read it? What if the other code reads the true multiple times because it loops faster than 200ms?
How many other places do you possibly need to read it? Maybe you can use latch action combined with an event structure to cause parallel code to react to the value change? (see attached example, LabVIEW 7.0). Maybe you should rethink your code, there might be better alternatives.
Dave123 wrote:
Keep the toggle button held down for a second or two, release it and you should see the button goes true again (and is promptly cleared in the case). Why does a mouse button release set the button to true?
Easy! In this case, you should use "switch when pressed" as mechanical action. You use switch until released, which confuses LabVIEW.
Switch when released does two things: (1) It switches to true as long as you keep the button pressed. (2) When you release the button, it switches to off. Now, if your code inverts the switch via a local variable while it is still pressed, the release tries to invert the current state and turns it off-to-on again by mistake.
This might be a slight flaw (bug) in the LabVIEW code. Releasing the button should force a FALSE to the button, not an iversion of the current state.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
ButtonForceClearExampleMOD.vi 26 KB -
Working with mouse events in Strobe's Widget classes
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Mouse event not working on JTable in JAVA 1.4.2
mouse event is not recognised on empty table when using with java 1.4.2. Please specify if there is any chnge done for mouse event capture for table from java 1.3.1 to java 1.4.2.
since mouse events are working fine for JTableHeader.
if anybody have an idea please let me know.Hi
JTable is there on JPanel . same code is working in JAVA 1.3.1
actually its a bug in java 1.4.2 ( ref. bug_id=4940522 )
here is the code reference..
public class TableEditor extends JPanel
�implements ListSelectionListener, Selector, Editor
private JTable�myTable;
private JPopupMenu myPopup;
private Vector�myActions;
private Vector�myListeners;
�
public TableEditor(String anAssociation, Editor anEditor, int type)
super(new GridLayout(1,1));
�
myListeners = new Vector();
myActions�= new Vector();
myPopup�= new JPopupMenu();
myTable�= new JTable();
��
myTable.getSelectionModel().addListSelectionListener(this);
myTable.addMouseListener(new MouseAdapter() {
�public void mouseClicked(MouseEvent me)
�{
� if ((me.getModifiers() & MouseEvent.BUTTON3_MASK) != 0)
� {
��// Update actions in case ListSelectionModel are out of sync.
��for (int i = 0; i < myActions.size(); i++)
��{
Object o = myActions.elementAt(i);
if (o instanceof SelectorAction)
((SelectorAction)o).check();
���}
myPopup.show(myTable, me.getX(), me.getY());
�}
// Added mouse listener to JTableHeader
// This is a temporary solution to open popup menu on blank table,
// as in Java 1.4.2 no mouse event captured on blank table.
// So for now we will capture the event from the table header.
JTableHeader myTableHeader = myTable.getTableHeader();
myTableHeader.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent me)
�{
if ((me.getModifiers() & MouseEvent.BUTTON3_MASK) != 0)
// Update actions in case ListSelectionModel are out of sync.
for (int i = 0; i < myActions.size(); i++)
��{
Object o = myActions.elementAt(i);
if (o instanceof SelectorAction)
((SelectorAction)o).check();
���}
myPopup.show(me.getComponent(), me.getX(), me.getY());
� }
�});
The solution given is temporary ( adding JTableHeader component)..
we want to retain the same functionality .. mouse event should get captured on empty table only.. -
Dragging a JPopupMenu around with a mouse. What am I doing wrong?
Hello,
I need to move a JPopupMenu around with a mouse, but it isn' working out as expected.
Menu is being moved erraticaly, jumping here and there a bit, and lagging behind the mouse movements.
Although it is moving in general direction of mouse drags.
Anyone has an idea what am I doing wrong?
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JPopupMenuDragTest {
public static void main(String[] args) {
new JPopupMenuDragTest();
JPanel contents = new JPanel();
DraggablePopupMenu popup = new DraggablePopupMenu();
public JPopupMenuDragTest() {
contents.setPreferredSize(new Dimension(512, 384));
contents.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
popup.show(contents, e.getX(), e.getY());
showFrame(contents);
void showFrame(JPanel contents) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(contents);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
class DraggablePopupMenu extends JPopupMenu implements MouseListener, MouseMotionListener {
JButton btnDragger = new JButton("drag me");
int clickx, clicky, menux, menuy;
public DraggablePopupMenu() {
add(btnDragger);
btnDragger.addMouseListener(this);
btnDragger.addMouseMotionListener(this);
public void mousePressed(MouseEvent e) {
clickx = e.getX();
clicky = e.getY();
Point locationOnScreen = getLocationOnScreen();
menux = locationOnScreen.x;
menuy = locationOnScreen.y;
public void mouseDragged(MouseEvent e) {
int xOffset = e.getX() - clickx;
int yOffset = e.getY() - clicky;
setLocation(menux + xOffset, menuy + yOffset);
public void mouseClicked(MouseEvent e) {}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseMoved(MouseEvent e) {}
}Thanks, that kind of works. The point is, I have to use Java 1.5, which does not support getX/YOnScreen for MouseEvents.
I changed the code to:
public void mouseDragged(MouseEvent e) {
Point p = e.getPoint();
SwingUtilities.convertPointToScreen(p, (Component) e.getSource());
setLocation(p.x - clickx, p.y - clicky);And everything seems fine, until iI drag the popup out of the containing JFrame.
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If you can find the answer for this, tat would be great, but thanks anyway. -
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.
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I have tried creating own class that contains a image and string but I having problems.
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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 -
I had a problem and solved it, but I don't like the solution and still don't get the problem. So, I hope somebody can explain:
I am using TestStand in combination with a LabWindows/CVI Operator Interface. At a certain point I have to open a second LabWindows/CVI UI application (reused for some specific operator interaction). An operator eventually closes the second UI via a 'Close' button. However, the UI does not respond to mouse events on the button. The UI does respond to the shortcut keys (Esc or Alt-C).
I discovered that it is not the first UI (the Operator Interface) that is 'stealing' the events. It appears that TestStand does not allow the UI to process the events. As soon as a Message Popup step is being executed the events are handled. So, we made TestStand periodically verify whether the Close button was pressed in a call to the second UI. In the UI we first call ProcessSystemEvents. This worked pretty well. But, then I decided to neatly place the periodic poll in a separate sequence running in a separate thread. Again I ran into the same problem. So, the TestStand execution really has to get interrupted and I am forced to pollute my sequence files with the periodic polls. Boeh hoe :-(
Greetz,
David MeijersBas,
I will try to extract a usefull stand-alone example out of our complete system. It might take a while though, because I have a workaround (so, I will try finding the problem in spare time for the better of mankind ).
Greetz, David -
Iocane: poison the rodent (simulate X11 mouse events from keyboard)
Iocane: the colorless, oderless, tasteless poision that will rid your system of its rodent infestation. Though no promises about its effectiveness against Rodents Of Unusual Size.
Iocane simulates mouse events from the keyboard. Iocane can be passed a few parameters which - ideally - could each have a key binding in your favorite window manager.
If iocane is called with no parameters it starts in interactive mode (which currently lacks documentation ... hey, I just wrote this this morning). In interactive mode the directional arrows or h/j/k/l keys move the mouse cursor. The number keys simulate button presses (1 = left button, 2 = middle, 3 = right). The page up and page down keys simulate mouse wheel activation. "q" quits from interactive mode returning any grabbed keys to their normal behavior. Key bindings are all controlled from a simple rc file.
Iocane can also be passed a series of commands on the command line or the filename for a script file with a list of iocane commands. Iocane can also read command from its standard input.
Iocane is conceptually similar to some functions of xdotool, but iocane should work under any window manager (or no wm at all), is much smaller, and the interactive mode allows for a sequence of many actions without the program having to start up and close down many times in rapid succession.
Please report bugs or feature requests here. Iocane is currently 127 lines of C, and it will remain small; in other words, features will only be added if the can be added without substantially increasing resource use.
EDIT: Version 0.2 is now in the AUR
Last edited by Trilby (2012-11-03 02:23:15)Any arbitrary number of buttons should be easy enough to simulate - provided the Xserver actually responds to events with that button number. An update I'll push to github tomorrow will include a few changes, including buttons 1-9, but if there is need/desire I could increase that. Sticking to 1-9 allows for the computationally cheaper hack of converting a string to a number by simple substracting 48 from the value of the first character; numbers greater than 9 would require the use of atoi() or some funky conditionals. In the grand scheme of things this is fairly trivial, but unless there is a real reason to use more than 9 mouse buttons I'd prefer to keep the lighter code.
Passing a window name and getting it's coordinates is possible but after considering it I've decided it wouldn't fit well in iocane. The reason being that to do a half-arsed job of it would be pretty easy. To do it properly, however, it would take quite a bit of scanning through recursive calls to XQueryTree, polling atoms/wmhints, matching strings, checking for subwindows in the case of reparenting window managers, and a bunch of other nonsense ... all to get two coordinates.
However iocane will play nicely with any tool that will provide those coordinates from a given window name, so I can imagine and invocation such as the following to move the mouse 10 pixels right and down from the top left of a window - lets call it FlamingSquirrel - and simulate a click there:
iocane $(cool_app FlamingSquirrel) : move 10 10 : button 1
Currently that could only be done from a command line invocation, not from a script or interactive session, as it requires shell processing for the command substitution. I can add support for this type of invocation in scripts and interactive mode as well. Then all you need to do is find (or write) a program that will give coordinates for a window given a title/name. I suspect such a program probably exists out there, or if you are comfortable with C, I could give you the starting framework for it as I made something that would have much code in common for another task on these forums (it's in jumpstart.c in the "misc" repo on my github).
In fact, you could use the following
xdotool mousemove --window FlamingSquirrel 0 0 && iocane offset 10 10 : button 1
Though if you are using xdotool anyways, I'm not sure if iocane would serve much of a purpose, unless you just prefer iocane's syntax.
Last edited by Trilby (2012-11-01 00:21:14) -
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 -
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 BilouHello 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.
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