Question of displaying Task Flow Region in Master-Details pattern

We have a master-details page. There is a region on the details pane along with other widgets and the content of that details pane including the region depends on the row selection on the master table list.
The first time page loads with no row selection on master table so this details pane displays nothing. When I select one row on the master table and the details pane and its region can display data of the row in master table properly.
After several selection, I navigate to another page and then go back to this master-details page again, it automatically selects the row which was selected last time. And in the details pane, the region whose content was created basing a task flow call cannot display corresponding data of the default selected row while other widgets in the details pane can display corresponding data properly.
The reason of having this problem is the region's parameter is generated before the selected row is determined. When the task flow call in page definition is parsed, the parameter of this task flow call is created before component binding of the master table. It means when the task flow call is parsed and generating the parameter, the ADF page believes there is no row selection of the master table because the component binding is null at that time.
So my question is how to make the this task flow call for that region create the task flow call parameter after the component binding of the master table? Or is there any way to force a refresh of the region/task-flow-call after the render of response? Or is there anyway to disable this "auto-select" on the master table after navigating to other page?
(My jdev version is JDEVADF_11.1.1.6.0_GENERIC_111205.1733.6192.1 )
Edited by: user790224 on Sep 6, 2012 4:16 PM

The reason we are using master-details patter here is it is designed in that way and the region is displaying the data of a selected row there.
There is no master-details relationship on model layer. But the content of the region is from the result of several other Java API calls which call the task-flow from an external component.

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Hi,
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Edited by: makdutakdu on Jul 4, 2012 1:05 PM
Edited by: makdutakdu on Jul 4, 2012 1:09 PM

HI
If i understood your question on overview, your requirement is
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Me too facing the some problem can some one pls help

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Anyone...anybody!!!
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Edited by: 805740 on 2.12.2010 07:14

Thanks for your reply. I have created my pages on apex.oracle.com
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There are two tabs. Different solutions on each one.

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Here is my solution:
My task flow requires a the value #{pageFlowScope.type} to be set. My application has a dynamic region that is changed on the fly using a menu model. The region uses a backing bean (mainRegionManagerBean) which is in the viewScope to manage what taskflow is shown in the region. There are multiple menu items in the menu model that point to the same task flow but pass different values to the #{pageFlowScope.type} parameter. So i wired the menu items up to different methods in the mainRegionManagerBean which set the value for me. See the relevant code below.
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Edited by: Adam Stortz on Nov 22, 2011 11:10 AM

Question of displaying Task Flow Region in Master-Details pattern

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