Warning on Unsaved Changes Functional Pattern --Help!

Is there anyone out there who knows how to make this work??!!
[http://www.oracle.com/technology/products/adf/patterns/11.1.1.1.0/UnsavedDataWarning.html]
Help!

Frank Nimphius wrote:
Hi,
I am not familiar with the document, but options I see are
option 1: set uncommitted data warning property on the af:document to "on" (I am not sure, but think this is already available in JDeveloper 11g R1)
option 2: use the controller context (ControllerContext) of the ADFc task flow handler to detect if the transaction is dirty
option 3: use a managed bean that accesses the AM in the DataControl to check if the transaction is dirty
FrankThank you for the reply Frank. Below are my response to your options
response to option1:
I have already set the uncommitted data warning property on the af:document to "on" (yes, the option is already available in JDeveloper 11g R1) and even set the bounded task-flow inside the region of my page as "critical", but when I navigate to other pages thru the navigation items in my template header, the prompt for uncommited changes did not show.
response to option2:
Which class of my project will use the controller context to detect if the transaction is dirty? I have tried to google the uncommittedDataWarning property which lead me to the DirtyPageHandler class. I have read on DirtyPageHandler class API that in case I do not set an implementation the default implementation will be used- and if I me quote from the API -"that default implementation will always return false from isDataDirty and will do nothing in response to a trackNavigation call." I wonder if aren't there any concrete samples to make this work? As I understand, the uncommitted data warnings is one of the publicized new features of JDeveloper 11gR1. Nevertheless, I have tried to follow allong and did create my own implementation:
1.) I did override the isdataDirty method to always return true,
2.) override the trackNavigation method to "System.out.println("prompt");",
3.) and created a file named oracle.adf.view.rich.context.DirtyPageHandler in the META-INF/system folder of my project, and
4) created a one line text which represents my implementing class in the created file in #3.
but still nothing especial happened.
response to option3:
What exactly is "AM" in the DataControl?
Your feedback on this is very much appreciated.
Thanks,
pino

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Warning on Unsaved Changes Functional Pattern

Overview
One advantage of integrated applications is users can easily navigate just about anywhere based on current needs. However, with the added flexibility also comes the increased risk of unsaved data accidentally being lost when navigating away from a page. Therefore, many applications typically warn the user when this is about to occur. Using the new warning on unsaved changes feature, 11g ADF applications can easily implement this type of functionality.
Click here to see the document that describes this pattern.
Edited by: Richard Wright on May 13, 2010 1:10 PM

Hi,
I have a page with an edit form. The user can close/leave the page by clicking on different buttons (menu items, close icon, back button). In this case, the system should warn the user about unsaved data. Furthemore, I want to skip data validation. I tried to implement the "Warning on Unsaved Changes Functional UI Pattern", although this approach doesn't skip data validation. How should I do this?
I'm using ADF 11g.
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if you are on a recent version of JDeveloper 11g then this functionality is provided out of the box. Also have a look at the af:document tag on your pages. It has a property "uncommittedDataWarning" you can set to on or off so this functionality is present event for single pages
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User, how should we know?
You did not give and information about the app, what's done before you try to navigate away, no jdev version.
You can turn the warning off completely, but i suggest you think about it first. If you get the warning, the transaction you are in is dirty. You loos every change you made if you navigate away from the page. Check Jdeveloper,Oracle ADF &amp; Java: Uncommitted/Unsaved Data Warning on page Navigation-Oracle ADF for info where to configure this.
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maybe that's not the first time, that someone asks this question here, but unfortunately I couldn't found any concrete examples on the forum. So I'd like really to get your help:
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Hi David,
Thank for the prompt answer. I've tried that before but I have put that in checkin action. So that didn't work before but now as per your suggestion it works nicely. The form isn't evaluated.
However, this time my changes aren't reflected on the user.. Basically what I do is
- checkout user view (with empty form) (in an activity)
- update user view (in another activity)
- check in user view (in another activity)
however, changes are discarded. I used winmerge to compare and saw exactly the necessary fields are updated after update activity. but after checkin no changes are reflected. so what should I do now :(
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          <Argument name='viewId'>
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Unsave Changes

hi all,
sorry for asking again. there is one af:readonly table on my page, which i dragged from 'Data Controls'.on this table , i ve a 'Edit' button, which navigates to other page,
after selecting a single row.
On this page i dragged same collection fm 'Data Controls' as adf:form for editing purpose . i also dragged 'Commit' operation.its working fine.
But problem is that when i make a change in any field & navigates to page which contains table, without committing, that changes instantly reflected in table. i m navigating by a af:commandlink.
even i m refreshing that table's iterator 'always' in pagedef file,everytime i navigate to that page. it should read fm underlying model. but this is not happening.
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Edited by: user78995 on Apr 13, 2010 9:39 AM
Edited by: user78995 on Apr 13, 2010 1:15 PM

hi all,
i got solution here - http://andrejusb.blogspot.com/2008/09/jdeveloper-11g-crud-in-adf-form.html
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Action: updatedYou should probably change the Pattern to be less explicit about what it matches. i.e. changes spaces to \\s+ or something similar.
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Warning on Unsaved Changes Functional Pattern --Help!

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