hello mario, there is also a second possible solution for this problem.
advantage: you don't have to walk through the component tree once more. disadvantage: it's maybe a bit more work than the PhaseListener approach mentioned by cagatay. you can decorate all renderers and manually add (it is real adding - no replacement) your ValueChangeListener if you would like to choose this solution you are welcome to look at the implementation of jtracc (http://jtracc.org or direclty at http://code.google.com/p/jtracc/source) - there i implemented such a wrapper (TranslationRendererWrapper). it's an other domain so you can ignore what's going on in this wrapper in detail. in your case you have to add a ValueChangeListener manually by using code like: ( (EditableValueHolder) component ).addValueChangeListener(...) -- before you do that you have to check if the current component is a component which implements the EditableValueHolder interface! after adding the listener you can simply delegate to the decorated renderer. regards, gerhard 2007/11/12, [EMAIL PROTECTED] <[EMAIL PROTECTED]>: > > Hi Cheers, but if a componenet already has a ValueChangeListener setted > by the programmer for other reasons? The new ValueChangeListener si > added or replace existings? > > Thank, Mario > > -----Original Message----- > From: Cagatay Civici [mailto:[EMAIL PROTECTED] > Sent: 12 novembre 2007 14.50 > To: MyFaces Discussion > Subject: Re: How know witch data in changed > > Hi, > > A phaselistener may work here, in after phase of restore view, > traverse the component tree, if the component is an > editablevalueholder, > cast the component to editablevalueholder and add the > valuechangelistener by addValueChangeListener or > setValueChangeListener. > > A valuechangelistener implementation needs a processValueChange method > or it can be a method binding, in your case the first option is a > better alternative > > See editableValueHolder for more info. > > Cheers, > > Cagatay Civici > [EMAIL PROTECTED] > ps3 network id : facescontext > > On Nov 12, 2007 3:06 PM, <[EMAIL PROTECTED]> wrote: > > > > > > > > > > Is there a way to set the same ValueChangeListener to all component of > all > > view without specific code in the page? I don't want leave my > programmers > > manage the logic to know witch component is changed, because I need to > > managed this kind of problem in the framework code. > > > > > > > > Any suggestions? > > > > > > > > Thanks, M. > > > > > > > > ________________________________ > > > > > > From: Gerhard Petracek [mailto:[EMAIL PROTECTED] > > Sent: 12 novembre 2007 13.34 > > To: MyFaces Discussion > > Subject: Re: How know witch data in changed > > > > > > > > > > hello mario, > > > > sounds like you are searching for the mechanism of > ValueChangeListeners. > > > > regards, > > gerhard > > > > > > > > > > > > 2007/11/12, [EMAIL PROTECTED] > <[EMAIL PROTECTED]>: > > > > > > > > Hello, I need to know witch data of a view is changed. Is there a way > to do > > that with no specific code? I'm going to do it in a PhaseListener that > > compare data of each component before and after "apply Request" phase. > > > > > > > > What do you think? > > > > > > > > Any suggestion is Appreciated. > > > > > > > > Regards > > > > Mario > > > > > > > > ________________________________ > > > > > > This message is for the designated recipient only and may contain > > privileged, proprietary, or otherwise private information. If you have > > received it in error, please notify the sender immediately and delete > the > > original. Any other use of the email by you is prohibited. > > > > > > > > > > -- > > > > http://www.irian.at > > > > Your JSF powerhouse - > > JSF Consulting, Development and > > Courses in English and German > > > > Professional Support for Apache MyFaces > > > > > > > > > > > > This message is for the designated recipient only and may contain > > privileged, proprietary, or otherwise private information. If you have > > received it in error, please notify the sender immediately and delete > the > > original. Any other use of the email by you is prohibited. > > > This message is for the designated recipient only and may contain > privileged, proprietary, or otherwise private information. If you have > received it in error, please notify the sender immediately and delete the > original. Any other use of the email by you is prohibited. > -- http://www.irian.at Your JSF powerhouse - JSF Consulting, Development and Courses in English and German Professional Support for Apache MyFaces
