Missing Mouse Events

I’ve noticed that it is possible to miss mouse events
if you move the mouse very quickly. For example, if you quickly
move the mouse off a control, you can fairly easily miss the
MouseOut event. Is there a Best Practice way to get around this?
Thanks!!

If you move your mouse quickly over an object, you can fairly
easily miss the mouseout event. This is especially true if the
object you are moving the mouse over is fairly small.

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Event case missing mouse events on active-x component

I am using a Treeview and capturing selections in the tree using mouse events (event structure). I have a problem where approx 3 out of 15 mouse events are not actioned by the event structure - has anyone else had this problem or is there any suggestions?
Thanks.

Could you post a copy of your code that demonstates this?
I have experimented with this control and its events.
We may be able to help if we have soething to look at.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Photos in library missing from Events? I have a solution

This is a continuation from an answered question here: https://discussions.apple.com/message/15830476#15830476, but with a new twist and a solution that I found myself. Hope it helps others:
After doing a corrupt library rebuild, I noticed some photos missing from events but still existing in the library. Read the above discussion for full background then come back if you'd like.
I found photos that I could see in "Photo" view but could not see in "Events" view. I even chose one particular photo by filename. When I searched for it while in "events" view, it appeared as the sole result but it did not have an event name above it like it should have (check this by searching for a photo by name while in "Events" view). It was just sitting there like a sad eventless orphan. So I grabbed that photo with my mouse pointer and dragged it over to the navigator bar and dropped it on "Events". And this worked! I now had a new event with only that photo in it and the event was named the same name as the photo. Now the photo was magically back in Events. Since this problem was occurring with a lot of photos we took over the last month and they were intermingled by date with other photos taken over the last month (from other cameras or imported from email attachments) that were correctly in "Events", then I went to the photo view, grabbed a whole bunch of photos, many of which were not in an event and some that were, and dragged them over to the "Events" item in the tree and dropped them on it. It gave me a warning like "These photos cannot be in two events at the same time so they will all be moved into a new event" with an option to "Cancel" or "Create". I hit create and oila, I had a new event that graciously adopted all the sad orphan photos and also kidnapped some photos from other events too. I just went in, reorganized them back to proper places (thank goodness they were all recent and there were only 250 or so and not 1000s) and I am happy. Provided this works in the long term, it was an interesting workaround for a bug that I don't know the cause and I'm glad to share with all of you.
By the way, I'm using Snow Leopard and iPhoto 09' with all the lasted software updates on an Intel iMac Core 1 Duo.

By the way, I was able to confirm now (I think) that all photos in the library are assigned to events by looking at the totals in "Photos" and matching it with the sum of photos and movies when "Events" is selected. Unfortunately, I didn't check to see if this was also the case before I did my fix, but if anyone is missing photos in Events that are definitely visible in the Photos view, please check these to sets of numbers and see if you can identify the discrepancy before applying my fix. That would be good proof of the bug.

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.

Firefox missing mouse clicks

I have updated both my desktop (Win7) and my laptop (WinXP) to Firefox 9.0.1 (from 8.0) and both are suffering from this issue.
about 99% of my left mouse clicks seem to get ignored, but middle and right are both perfectly find. Left button operates correctly in all other programs.
The mouse works correctly in the taskbar/menus/tab bar/scroll bar, but stops as soon as I am inside the page display area.
Sometimes if I click continuously for 10 seconds I get an ok click, or sometimes I have to use a different program for a minute and then come back, then I can get 1 or 2 clicks before it stops working.
Currently navigating using tab, and shift+tab.
This is very very annoying, has anyone else noticed this after update? or have any ideas?

garry wrote:
My current issue is that if the simulator is frozen (system time is cycling within a 100ms window) mouse clicks on buttons are getting lost.OK that's an entirely different kettle of fish. Firing an action does require that the mouseReleased be later than the mousePressed, and that both be over the button.
Consider ths scenarion in any normal application that doesn't interfere with the system time. The user presses the mouse over some other component, drags over to the button and releases it. Next, the user presses the mouse over the button, drags off the button and then releases it. This isn't supposed to trigger the button's ActionListener#actionPerformed.
With the system time looping, how does the runtime know that this isn't the case?
I can see the button border change when I move the mouse over the button,that's rollover, triggered from mouseEntered. timing is not an issue.
but the mouse click is lost (button does not get depressed).See above.
Sometimes it works fine for a few mouse clicks and other times several mouse clicks will be lost in a row.See above.
It seems random.In a way, it is.
This seems to be more prevalent with buttons than capturing a mouse click on a panel where I do 2D drawing. Not sure why.Could be just human susceptibility to guesswork, or may actually have something to do with the occasional additional processor cycles involved in the custom painting. Since you haven't described the frequency of repainting nor its complexity, that guess is my susceptibility to guesswork ;)
When I put the simulator into Run mode, it works perfectly, never missing a click.Of course it will.
Anyone out there have any insights into what might be going on under the hood inside Java/Swing with mouse events and the system clock?See above.
db

Missing Mouse Up Bug

I have Labview 6.02. Sometimes when my VI is running, Labview misses
'mouse Button Up' events. So if I try to scroll, I can't let go of
the bar. Or a button will get stuck down. It usually catches the
'mouse Button up' about 5-10 seconds later. This make it really
difficult to use!
Anyone else seen this? Any solution?
-paul

>Nothing is using any significant amount of CPU.
How is the actual CPU usage when the program is running?
I have written an application that sometimes receives spikes of up to 600 UDP packets/second (several ports). Its running on an old 133MHz Pentium and there is no slowdown at all.
How are you using the ethernet. UDP or TCP? For TCP, do you maintain a connection, or establish a new connection for each chunk of data? Do you use datasocket connections or plain TCP?
If using Windows, go to a command prompt and type "netstat -an" after runing the program for a while. Is there a buildup of many stale connections.
Of course it could also be a hardware conflict, e.g. between the drivers for the NIC and the video card. Have you upda
ted the network card drivers? Maybe try a different NIC or put it in a different PCI slot.
LabVIEW Champion . Do more with less code and in less time .

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

My iPhoto 11 is missing several events following last import, however I can see the missing events using Aperature.

Hi I'm missing several events in my iPhoto library following my last import. If I open up Aperature to access the library I see all of my events, does this mean my library is corrupt? I've already tried repairing the iphoto database, rebuilding the thumbnails, and rebuilding permission all without success. My last option is rebuild the database. Has anyone seen this issue?

I don't use Aperture so don't know how it works in relation to viewing the same library as iPhoto. There may be some cache that Aperture is viewing.
You can also try this:
1 - delete the iPhoto preference file, com.apple.iPhoto.plist, that resides in your
User/Home/Library/ Preferences folder.
2 - delete the contents the following folder:
User/Library/Containers/com.apple.iPhoto
3 - reboot, launch iPhoto and try again.
NOTE: For Mavericks, 10.9, go to your Home folder and use the View ➙ Show View Options menu to bring the this window:
where you can check the Show Library Folder checkbox.

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]]

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.

HTML/JS: Capturing mouse events while Air is out of focus

Hi,
I've been trying to determine if it is possible to receive mouse events (like MOUSE_WHEEL) if the Air window does not currently have focus. I'd like my application to support the mouse wheel for scrolling while the cursor is over the application, without requiring the user to click the application and gain focus. My application uses JavaScript to scroll an unordered list within a DIV set to overflow:hidden (to prevent the native scrollbar from appearing).
Thanks for your help!
Andrew

I doubt that AIR would pick up events fired while not having focus. Perhaps you could fake it by creating an AIR project that runs "fullscreen", but has a smaller active window. Anywhere your mouse went it would still capture the scrolling event, but you could conditionalize it so that it only worked in certain areas.

Mouse Events at the icon in systray.

My program call library function to add, modify or delete icon into systray.
Additionaly I'd like to get back information when any mouse event had happen under icon in systray like move mouse, right/left button click etc. to display popup menu (as an standart behaviour).
I've tried Windows Message Queue, but it only works inside application window area.
How could I do it ?
Any suggestions, examples or advises ?
Rumcajs.

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Disabling mouse events

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.
I basically have a game of tiles on a JFrame and I am going to have the human player play against the computer. I want to be able to have turns; computer and human player turn.

removeMouseListener()

Touch to Mouse events conversion

Hi Everybody!
Does anybody know how correctly fire mouse events to Oracle Maps in javascript?
Default translation touch events in iPad Safari does not quite fit. It try zoom or pan browser window, not map. :(
If catch touch events and disable default translation I can zoom and pan MVMapView object.
But how fire "click","mousemove","mouseover" events on Map? I need dispatch event to ThemeBasedFOIs (InfoWindow Popup and other listeners)?

Yes. The Oracle Maps tutorial contains examples (the tutorial can be found in your mapviewer deployment
e.g. http://localhost:7001/mapviewer/fsmc/tutorial/index.html) and documentation in the API reference
(e.g. http://localhost:7001/mapviewer/fsmc/apidoc/index.html). Look at MVEvent and the attachEventListener function of MVMapView, MVThemeBasedFOI, and MVFOI classes for example.

Missing Mouse Events

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