Multiple Listeners - Multiple Event Handlers

According to the tutorial, event handling code executes in a single event dispatching thread to ensure that each event handler finishes execution before the next executes. I'm also aware that I can add multiple action listeners to a single component, like JButton. But if I add mutliple listeners to a component, is there any way to determine in what order the event handling code will execute? Is there an order to which the listeners listen..
Thanks in advance.

Thanks to both of you for your responses and suggestions.
camickr...
I don't think its good style to add multiple listeners
and write code dependent on the order of execution.I appreciate your candor here and I'm inclined to agree. So I've reorganized things a bit and I don't need to have the listeners in any particular order. But thank you for taking a look at the source code. It didn't occur to me to do that. That is interesting.
Deudeu..
If you require a specific sequential order you should create cascading eventsThis would be a way to resolve the issue of sequential response. When I changed my design a bit however, I didn't need to perform anything sequentially.

Similar Messages

[JS] Basic question about event listeners and event handlers

I am very new to the whole topic of event listeners and event handlers. I'd run the test for the following problem myself, but I don't know where to start, and I just want to know if it's impossible -- that is, if I'm misunderstanding what event listeners and event handlers do.
Say I have an InDesign document with a text frame that is linked to an InCopy story. Can I use an "afterImport" event listener on the text frame to perform some action any time the link to the InCopy story gets updated? And will the event handler have access to both the story that is imported, and the pathname of the InCopy file?
Thanks.

Thank you, Kasyan.
Both of those are good solutions.
We are currently using InDesign CS4 and InCopy CS5. I'm hoping to get them to purchase the whole CS5 suite soon, since I'd like to start writing scripts for InDesign CS5 as soon as possible, as long as I'm going to have to be doing it in the not too distant future anyway. The greater variety of event handlers sounds like it might be something that is crucial to the project I'm working on, so that adds to the argument for getting CS5.
Thanks again. You have no idea how helpful this is. I made some promises to my boss yesterday that I later realized were based on assumptions of mine about the InDesign/InCopy system that didn't make any sense, and I was going to have to retract my promises. But after reading your response I think I can still deliver, in a slightly different way that I had been thinking before.
Richard

Multiple event handlers registered for the same event and error when adding users to sec groups

Project Server 2013 CU April (May) 2014
I've created and installed two event handlers (separate dll:s) and both are triggering on Project Published - initially, both are working fine.
After an IISReset, trying to create a new security group (or add a user to an existing group) will result in an error on the page and a corresponding error in the ULS log - the latter indicating an error in the method security.creategroups, and specifically
a problem 'An item with the same key has already been added.'
An SQL trace reveals a break in execution after executing the proc 'pub.MSP_ADMIN_ReadEventReceivers' which returns all registered event handlers.
In my case, the result of that proc execution shows that there are two event handlers registered with an EVENT_ID of 53 (Project Published) and with ORDER_FIRED set to 1 and 2 respectively.
I tried removing one of the event receivers using the Central Admin PWA interface and then everything worked just fine - I added the event receiver back again, and everything STILL worked! IISReset and I got the error back again. :-(
Since there's obviously some problem with reading multiple entries from that table regardless of the ORDER_FIRED differentiation, I tried temporarily modifying one of the '53' entries in the table directly and then the sec group was created just fine!
I would like to know if anyone else has seen this? I've seen this on three separate installations now after deploying a second event listener onto those systems.
/Lars Hammarberg
//Lars Hammarberg www.connecta.se

Hi Lars,
yes I have seen the same issue. It is not related to April CU. I had the error before with SP1.
It is not only an issue with the security groups. At least in our case nothing worked at all. No custom field editing, all Queue Jobs failing.
For your case I suggest you consolidate your code in one eventhandler.
Theory says that you can have more than 1 (up to 999) eventhandlers for one Event (http://msdn.microsoft.com/en-us/library/ms481079(v=office.12).aspx) but that seems not to
work. Not sure, if it worked in earlier versions.
Kind regards
Christoph
Christoph Muelder | Senior Consultant, MCTS, MCSE, MCT | SOLVIN information management GmbH, Germany

Multiple event handlers for one button

I'm trying to create a button with 2 event handlers, such
that when you roll-over the button, a submenu pops up, and when you
click the button, you go to a certain frame. I feel like this
shouldn't be hard at all, but it's not working. Below is the
actionscript I have tried. Both event handlers work as I want them
to if alone, but the on(release) functionality does not work when I
try to put them together.(I have Flash 8). Thanks for your help!
on (release) {
_root.gotoAndStop("one1");
tellTarget (_root.navigation) {
gotoAndStop (1);
on (rollOver) {
this.gotoAndPlay("links");
tellTarget (_root.navigation.introduction) {
gotoAndStop (1);
tellTarget (_root.navigation.overview) {
gotoAndStop (16);
tellTarget (_root.navigation.coronary) {
gotoAndStop (1);

this code is ok, it seems that when u rollover on the button,
the event is fired and it keeps on running the time u r on it. i
think just add
delete this.onRollOver inside rollOver event.

Multiple menu items != multiple event handlers?

I'm developing a program whereby a user can rate how much they like certain images when displayed on screen. The bulk of the work is done, but my rating mechanism (first attempt at one) is currently a right-click pop-up menu with the values 1-10 in ten menu items - naff I know, but its early design stages ;)
This brings obvious problems, and I don't want to have to code event handlers for each and every Menu item just to set the same parameter to a different value depending on which menu item the user clicked (i.e. I don't want to have to create an event for the first menu item that simply sets and int variable to 1, and do the same for #2 through 10). What I was wondering was, is there any simpler way of implementing this? I.e. can I use the same event for the whole popup menu and detect the value of the option clicked and set the value accordingly? This would also mean, should I need to extend the rating scale above ten, say perhaps to twenty, then there would be no further coding necessary (which is nice! Lol!).
Can anyone offer any suggestions? I did search, but tbh didn't have a clue what to search for. Your advice is appreciated.

Implement the ActionListner that allows the constructor to take an argument as to the rating of the menu item, and then set the required rating variable to this when called. For example
class MyRatingSystem
    int rating = 0;
    public void createMenus()
        JMenu ratings = new JMenu("Ratings");
        for(int i = 0; i < 10; i++)
            JMenuItem rating = new JMenuItem("Vote: " + i);
            rating.addActionListener(new RatingListener(i));
            ratings.add(rating);
    class RatingListener imlpements ActionListener{
        final int rate;
        public RatingListener(int rate)
            this.rate = rate;
        public void actionPerformed(ActionEvent ae)
            rating = this.rate;
}The above code is inefficient and is only there to serve the purpose of an example(look at the loop, although I would think the compiler could do some loop unrolling?)
HTH

Parallel event handlers disabling events while handling

Hi, I have an application where there are multiple event handlers in multiple while loops that are driven from the same front panel. The front panel controls are designed to provide diferent motion control moves for different axes under control. All events that trigger these moves are fired by the same event handler for the same axes of motion. Hence, for safety reasons, I do not want some of these controls to be executable while certain other move profiles are executing. Sounds simple to implement right?
When I use traditional prop nodes like disable to disable the front panel controls, the event queue still acquires the event and then subsequently executes it. I want to be able to clear this event queue so that no other events from a certain group of my front panel controls can be executed simultaneousy. However, I do not want to disable all front panel controls since I have other buttons that are capable of controlling other indepenedent things and safety functions like stopping.
It is like I need a disable events property or soemthing that can be done programmatically. Can someone please advise me on what makes sense to do here?
Attachments:
evntdisable.vi ‏119 KB

There is no way to interact directly with the event queue that LV maintains. If you need to do that you need to utilize the queue functions that LV provides and create your own event queue. However, if all you need is prevent interactions while an event in being processed, value change events have a setting that is (set by default) called: Lock Panel Until Handler Completes. And for other kinds of events, there's an option in the event structure's event-definition dialog box that perhorms the same action.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Some Doubts about Event Handlers

Hi,
I had some doubts on Event handlers in OIM 11.1.1.5 ........
1) I want to use the same event handler for both Post Insert and Post update task.... Can I use the same event handler for that... If yes then how can I do that....
2) Can I create the single Plugin.xml class and add the all jar files in single say lib folder and zip them all together.. if yes then What changes I need to do?? Need to add only the plugin tags for different class files in plugin.xml file? OR need to do some thing extra also...?
3) If i need to change any thing in any class of event handler.. Is there need to unregister the plugin and again register...??
If yes.... Is there need to delete the event handler using the weblogicDeleteMetadata command???
4) As we Import the event handler from path like event handler/db/... If we add all the evetn handler.xml files in that folder..... As During Import weblogicImportMetadata recursively call all the files in that folder.... Now if i need to change anything in any one of event handler class... then if we import from the same folder event handler/db/... What will it do............Create the duplicate copy of all the eventhandlers????? OR i need to add only those Eventhandler.xml files for those class files i made the changes.....
5) As I need to create email on user creation during recon and also email id get updated as first name or last name updates..... What I had to use in Event handler.xml (entity-type="User" operation="CREATE") or Some thing else....
Help me clarify my doubts...

Anil Bansal wrote:
Hi,
I had some doubts on Event handlers in OIM 11.1.1.5 ........
1) I want to use the same event handler for both Post Insert and Post update task.... Can I use the same event handler for that... If yes then how can I do that....Yes, you can have the same. Just have two event handlers in the same MDS file and the operation should be CREATE for one while MODIFY for another. The class and version and name remains the same.
2) Can I create the single Plugin.xml class and add the all jar files in single say lib folder and zip them all together.. if yes then What changes I need to do?? Need to add only the plugin tags for different class files in plugin.xml file? OR need to do some thing extra also...?Yes, in the single plugin xml you can define multiple eventhandlers and the jar will contain multiple event handlers class.
3) If i need to change any thing in any class of event handler.. Is there need to unregister the plugin and again register...??
If yes.... Is there need to delete the event handler using the weblogicDeleteMetadata command???No, if you are just changing the class, then you need to update the class only in the plugin. For this, first delete plugin and then update plugin and then purgecache.
4) As we Import the event handler from path like event handler/db/... If we add all the evetn handler.xml files in that folder..... As During Import weblogicImportMetadata recursively call all the files in that folder.... Now if i need to change anything in any one of event handler class... then if we import from the same folder event handler/db/... What will it do............Create the duplicate copy of all the eventhandlers????? OR i need to add only those Eventhandler.xml files for those class files i made the changes.....If won't create duplicate copies but would overwrite the ones which are there in MDS at the same location. So effectively, if the xml is not changing you should not be worried about overwritting.
5) As I need to create email on user creation during recon and also email id get updated as first name or last name updates..... What I had to use in Event handler.xml (entity-type="User" operation="CREATE") or Some thing else....For recon and event handler, you will need to have post process event handler on User CREATE and UPDATE. On Create construct the email address and populate it in the email field. For update check if the firstname/lastname are changing and if yes, then update the email id on the profile.
>
Help me clarify my doubts...

Using Multiple Event Listeners

Hi,
I have a movielcip (A) class in which I have used a Tween class effect on a child movieclip (B) scrollRect. The (B) Movieclip in turn has several movieclips whose have tween class effect being executed on thier child movieclips.
the tweens are all unique to each movieclip
and the event listeners are taken off once completed.
This works all well and good in FLASH IDE...
My problem arises when I try to view this in a browser on a Windows XP
it doesnt work in
Opera Version 9.63
Firefox 2.0
and Google Chrome 2.0
The only browser it works fluently in is
Internet Explorer 7.0.5
What is happening in most cases it that the animation appears to "stick" but i think what may be happening is the listening or removal of the event listeners. The animations are left incompleted.
Is there any rule of thumb when using multiple event listeners?
here is a snippet of some of my code
on click event from movieclip (A)
private function scrollToSlidePrev(e:MouseEvent) {
               if (((slideIndex - 1) >= 0)) {
                    nextButton.mouseEnabled = nextButton.enabled = previousButton.enabled = previousButton.mouseEnabled = false;
                    var position:Number = 0-SLIDEAREA.width;
                    var slide1:TileListSlide = slides[slideIndex] as TileListSlide;
                    var slide2:TileListSlide = slides[--slideIndex] as TileListSlide;
                    scrollSlide(position,slide1,slide2);
tween animation in movieclip (A) on (B)
private function scrollSlide(pos:int,slide1:TileListSlide,slide2:TileListSlide) {
               slide1.resizeSlideTo(0.6); // execute tween on child movie clips in B
               slide2.resizeSlideTo(1); // same as above;
               var rect:Rectangle = sliderMc.scrollRect;
               var tween1:Tween = new Tween(rect,"x",Regular.easeOut,rect.x,rect.x + pos,3,true);
               tween1.addEventListener(TweenEvent.MOTION_CHANGE,setSliderScroll,false,4);
               tween1.addEventListener(TweenEvent.MOTION_FINISH,toggleButtonEnabled,false,3);
tween animation in movieclip (B) children
public function resizeSlideTo(sc) {
               var m:Matrix = tileList.transform.matrix as Matrix;
               var p:Point = new Point (m.a, 0);
               var tween2:Tween = new Tween(p,"x",Regular.easeOut,p.x,sc,3,true);
               if (numericStepper != null) {
                    if (sc != 1) {
                         numericStepper.visible = false;
                         tween2.removeEventListener(TweenEvent.MOTION_FINISH,showStepper);
                    if (sc === 1) {
                         tween2.addEventListener(TweenEvent.MOTION_FINISH,showStepper,false,2);
               tween2.addEventListener(TweenEvent.MOTION_CHANGE,setScaleOnScroll,false,3);
here is the link
http://visual_admin.web.aplus.net/ticker/ticker_widget.html
the effect disables and re-enables the buttons when its done.... then the listeners are removed.
each one with the exception cretes its own unique tween (obviously this is a custom class built as each clip)
i really don't know what to make of it guys

apparantly making the tween a property of the class rather than a random variable in a function worked.....go figure

Event Handlers which trigger functions with multiple arguments

I am playing two video clips back to back. I have a few
things which I need to do in between clips, so what I am doing for
each is adding a handler for VideoEvent.COMPLETE, at which time i
want to call a function which takes multiple arguments, like this:
video.addEventListener(VideoEvent.COMPLETE,
myFunction("1","2","3"));
private function myFunction(var1:String, var2:String,
var3:String):void
video.removeEventListeners(VideoEvent.COMPLETE, myFunction);
I've already figured out that getting rid of event handlers
that trigger anonymous functions is impossible. Please don't tell
me that it's impossible to remove them if functions require more
than 0 arguments...

"muskiemania" <[email protected]> wrote in
message
news:gc0pk0$jfb$[email protected]..
>I am playing two video clips back to back. I have a few
things which I need
>to
> do in between clips, so what I am doing for each is
adding a handler for
> VideoEvent.COMPLETE, at which time i want to call a
function which takes
> multiple arguments, like this:
>
> video.addEventListener(VideoEvent.COMPLETE,
myFunction("1","2","3"));
>
> private function myFunction(var1:String, var2:String,
var3:String):void
> {
> video.removeEventListeners(VideoEvent.COMPLETE,
myFunction);
> }
>
> I've already figured out that getting rid of event
handlers that trigger
> anonymous functions is impossible. Please don't tell me
that it's
> impossible to
> remove them if functions require more than 0
arguments...
Any function that you add via addEventListener should expect
exactly ONE
argument, the event. And 99.958% of the time, you can take
that event
object and figure out exactly what you need to know.
HTH;
Amy

Multiple events in firePartialAction

I have two event handlers, A and B. How can I fire both events from one <firePartialAction>?

johnsold wrote:
You cannot change all the buttons at once, but you can still use the OR nature of the event structure with multiple events for one case.
Create a case for the three buttons' Value Changed events. Inside the case read all three buttons. AND the result. Wire the AND to a case structure. In the True case activate the code you want for all the buttons. In the False case do nothing.
Lynn
You will need to pay attention to the mechanal action of the buttons. If they clear when read this will not work.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot

How do I select multiple events in iCal 8.0?

In OSX Mavericks, I used to be able to select multiple events in iCal in the event list view. I could select the initial event in the span of events to be selected. Then hold Shift while selecting the final even in the span of events. As a result, all of the events in that span would be selected.
in OSX Yosemite, this is no longer possible. There appears to be no list view, and holding the Shift button does not allow me to select a span of events.
What is the best way to select a span of events, say as much as 30 events?
Thank you.

Empty Caches
1. Safari > Preference > Advanced
    Checkmark the box for "Show Develop menu in menu bar".
    "Develop" menu will appear in the Safari menu bar.
    Click Develop and select "Empty Caches" from the dropdown.
2. Quit Safari if open.
    Option click the "Go" menu in the Finder menu bar.
    Select "Library" and then "Caches".
    Look for the folder 'com.apple.Safari"
    Right click "com.apple.Safari" and select "Move to Trash"
    Relaunch Safari.

How do I copy multiple events from a single calendar to another calendar?

I have multiple events from my "Family" calendar that I want to move. I would like to create a new calendar and move only specific events from my "Family" calendar to this new calendar. I have tried to select each event, then export, but this doesn't seem to work. It seems to export all events in the "Family" calendar, not just the ones that have been selected. Is there any way to do this aside from exporting each event one at a time and reimporting to a new calendar?

Drag them there. The volume they’re put onto needs to be formatted as Mac OS Extended.
(111592)

How do I delete multiple events in Calendar on iPhone or iCloud?

If I want to delete multiple events in Calendar on iPhone or iCloud, is there any way to do it?
I don't want to be clicking / tapping for hours...
Thank you!

Welcome to the Apple Community.
Unfortunately, I don't believe that's possible.

Is there a way to create a multiple event screen saver from iPhoto events?

Is there a way to create a multiple event screen saver from photos in iphoto? I can create a single event screen saver, but don't know if it is possible to create a screen saver with more than one event.

Drag the events you want into an album and have the screen saver run from the album.

How do I split a single event with many clips into multiples events, one event per date?

I archived the video from my AVCHD camera into a Final Cut video archive. Later I imported this into iMovie. All the clips from this archive (spanning several months) are dumped into a single event. If I recall, older versions of iMovie would import video into separate events for each day. Then I would go through and give each event a meaningful name (e.g., "Mary's Birthday").
This is what I would like. Is there a way to split this very long event into multiple events, one for each day that is present in the event?

Not automatically but with imovie 10 you can create new events with any name you like then move clips into them from other events (Just like FCP 10.1). See:
http://help.apple.com/imovie/mac/10.0/#mov1d890f00b
You can also choose to display clips in an event grouped by date.
Geoff

Multiple Listeners - Multiple Event Handlers

Similar Messages

Maybe you are looking for