Executing code when a listener is added

Is there a way for an event generater to execute certain code whenever an event listener registers with it? If so, where would you have to put this code?

You write the appropiate support class for listeners to this event, that is, the class which handlers add<Something>Listener, and register only an instance of this class as a listener of the original event. In the add<Something>Listener, before adding the object in the listeners list, you execute the code you wish.
If this doesn't seem as an appropiate solution, will you please provide some more details? The topic is interesting, thanks.

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Thank Q
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Or SessionListener. - MOD

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I have two task flows: TFBrowseRecs and TFUploadFile.
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1. Is this approach OK?
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Edited by: Sašo C. on 29.9.2011 0:36

I doubt finalizer is right place regarding my requirements:
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Hello,
I've write the code in Key-ENTER trigger, but it doesn't work when I press ENTER key.
Best Regards
Joe

Matth M
Thank you.
The following msg. from help system shows that key-enter trigger will execute when the ENTER pressing event occurs. Need your more help.
Regards
Joe
>
(index: "DO_KEY" )
Executes the key trigger that corresponds to the specified built-in subprogram. If no such key trigger exists, then the specified subprogram executes. This behavior is analogous to pressing the corresponding function key.
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ENTER............Key-ENTER............[Enter]

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Hi,
I'm integrating my Spry event data with a YUI calendar.
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Cheers
Phil

You got different kind of observers in Spry Data.
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datasetname.addObserver( observer )
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Data Set and Region Overview
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add a WindowListener to the JFrame; windowClosing() will be called when the X is clicked (setDefaultAction is more or less just a convenience method for this)

How do I execute some code when a line of a table control is selected?

Hi,
I would like to execute some code when a line of a table control is selected. At the moment I have to select one or multiple rows and then press enter, this forces a screen refresh and my code is executed but I would like the code to be executed as soon as any line is selected.
I've done something like this using ALV grids and object orientated code but is there a way of doing this in a normal non-OO table control?
Thanks in advance.
Gill

Hi,
U need to declare a char1 field for marking (mark field). This will reflect with value 'X' in your tcontrol internal table for all the selected rows.
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int rCount = this.getFetchedRowCount();
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What happens if you just add the new row without specifying where to add it ? doesn't it add the new row on the same page as the last row ?
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Adf valueChangeListener autosubmit=true, execute code after update model

Hello.
I'm working with the valueChangeListener and autosubmit="true". I'll try to explain my situation
with an example.
jsp:
<af:form>
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</af:form>
backing:
public class Index {
    private MyObject myObject;
    public Index() {
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MyObject:
public class MyObject {
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    public MyObject() {}
     //getters/setters...
}In the line doSomethingWithMyObject(myObject) i need myObject with the actual values in the user form.
in the example above, the first time the page is rendered and shows the inputs
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the valueChangeEvent is fired, and the code in "index.changeListener1" executed, but at this moment
the model (myObject) hasn't been updated with the data that the user entered (Validation Phase).
So i need a way to execute my code called from the "valueChangeEvent" but after the model has been updated
Some notes about my problem:
     - The doSomethingWithMyObject(myObject) could update data in myObject
     - About binding="#{x.y}":
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     but i cant' use that, the method needs a MyObject instance.
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     - doSomethingWithMyObject" is a black box, so i don't know what is going to do with myObject
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What I'm trying:
     PhaseListener:
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     public PhaseId getPhaseId() {
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          this works but i don't know if this is the answer according to this post (unanswered at this time):
          http://forums.oracle.com/forums/thread.jspa?threadID=611643
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     using the controls binded to the backing
     public class Index {
          private MyObject myObject;
          private CoreInputText inputValue1;
          private CoreInputText inputValue2;
          //listener
          //getters/setters
     }     make a wraper like
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         private Index index; // wrap the backing index
         public MyObjectW(Index index) {
             this.index = index;
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             return (String) index.getInputValue1().getValue();
         public String getValue2(){
             return (String) index.getInputValue2().getValue();
         public void setValue1(Object v){
             index.getInputValue1().setValue(v);
         public void setValue2(Object v){
             index.getInputValue2().setValue(v);
    }and then call in the index backing:
doSomethingWithMyObject( new MyObjectW(this)); so it will access to the most actual values from user at the valueChangeEvent
But i really would like some way to execute my code called from the "valueChangeEvent" but after the model has been updated
so i dont need to wrap or implement PhaseListener
what do you think, what do you suggest, have any solution or a way to do what I'm trying?
thank you for your help...
Message was edited by:
akanewsted

Hello Frank, thanks for the response.
When you say
"If you need an updated object in this listener then you can update it from the value change listener as well"
you mean i can update the object by myself with the value from getNewValue()? or is there another way
to call to update the models at this time ?
I know i have the methods "getOldValue()" and "getNewValue()" in the "ValueChangeEvent" but what if i need
the actual value from the user in other control than the one that fires the event
example
Two inputs:
in the input1 the user enters some data
in the input2 when some data is entered it fires valueChangeListener (autosubmit=true)
in that case what if i need the value the user just entered in the input1 in the valueChangeListener of
the input2.
In general the app I'm working must do:
dynamically generate the controls in the form (inputs, selects etc)
Attach the control values to a model ( <af:inputText value=#{model.x}"/>
sometimes execute some script when a value change in a control (valueChangeListener)
those scripts uses the model (and needs to be an updated model)
          script = " if (value2 = 'xyz') then value1='abc'; return true;";
if the model is not updated
the script will use old values and will be wrong
or if the script change some value in the model, when the update model phase occurs the value from
the script is lost.
that's why i need to work directly with the model and not the values in the ValueChangeEvent
Is there a way to use something like an action in the change of a control value?
that way the code will execute in the invoke application phase, can this be done ?
how i can execute code in the invoke application when a valueChangeEvent occurs ?
hope this help to explain more my situation.
Thank you for your help and time.

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Hi,
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If you like ANT, maybe you should
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It is possible to programmatically disable the "Executing Code Modules in an External Instance of CVI" feature within a CVI project?
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Thanks in advance,
--M

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Hi,
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Hi,
ABAP code is server side and JS is client sides. You can't execute ABAP on the front end. What I suggest is that you submit a form before you actually close a window.
document.someform.submit();
window.setTimeout('window.close()',5000);
The close will only happen after 5000ms.
Check http://www.devguru.com/Technologies/ecmascript/quickref/win_settimeout.html for details.
in the oninputprocessing you can do your
delete from ZDATALOCK
where auid = sy-uname.
Also check /people/eddy.declercq/blog/2006/03/20/wake-me-up-before-you-go-go
Eddy

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Executing code when a listener is added

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