Overcoming a challenge: combining UI Shell dirty tab + self-closing-BTFs

I'm finding it difficult to utilise facilities of the ADF UI Shell from self-closing-standalone bounded task flow.
What the ADF UI Shell does well: from the UI Shell you can open a standalone BTF as an activity, and if the BTF closes itself (ie. given the user selects a ok or cancel/close button, the the standalone BTF navigates to a Task-Flow-Return option), the BTF closes and the ADF UI Shell correctly closes the tab around the activity.
My challenge is I want to add the ADF UI Shell's "dirty tab" facility to the BTF, such that if the user inside the BTF selects a custom cancel/close button (not the UI Shell close button for tabs) that navigates to the Task-Flow-Return option within the BTF, they get a chance to confirm/cancel the close via the ADF UI Shell dirty tab popup. (Note that the Task-Flow-Return options are critical to self-closing BTFs as they not only give the BTF the chance to commit/rollback, as well as make them re-entrant, or play with the savepoint features.)
If from the ADF UI Shell shellLauncher bean we call makeCurrentTabDirty method on opening the BTF, the BTF's activity tab is italicized correctly. Yet if the user selects the BTF's cancel button, the BTF closes (it actually disappears from the ADF UI Shell) but the UI Shell activity tab is still visible, then the dirty tab dialog shows, which is too late, the BTF has closed already.
So my solution at this point is on the BTF close button being pressed, before it navigates to the BTF Task-Flow-Return option, I can get the ActionListener of the BTF close button to raise a Contextual Event to the ADF UI Shell to capture the "Close Event" occurring. The UI Shell then has a chance to show the dirty tab dialog by capturing the Contextual Event.
My sticking point then is the TabContext class provided in the UI Shell has no way to invoke the dirty tab dialog without calling the removeTab method. It's not desirable for the UI Shell to close the BTF as the BTF's Task-Flow-Return activities must still be called.... remembering they have additional functionality that is required for the BTF.
Even if the TabContext method did have a solution for displaying the dirty tab dialog without closing the tab (TabContext is easy enough to extend yourself if you have the source code), the problem to which I can't think of a solution is, how to get the dirty tab dialog to communicate the result (yes/no) back to the standalone BTF such that it can make a decision about aborting the close action and leaving the user on the current page fragment, or navigating to the Task-Flow-Return node?
It might be suggested I could expose the dirty tab dialog to the standalone BTF such that it could show the confirm dialog itself. However the point being is the BTF is standalone, and should not have any knowledge of where it's being used, in the UI Shell or some other application supershell. Publishing the intent to close the BTF via a contextual event seems fine, but alternatively loading in components from the UI Shell seems to break the standalone I-don't-know-or-care-about-what-my-parent-caller-is-doing BTF principle seems on the border of wrong.
Anybody any pointers, suggestions, or comments like you're-an-idiot-Chris,-do-it-this-way? Your help appreciated.
Regards,
CM.
PS. JDev v11.1.1.2.0 with UI Shell v1.02

how to get the dirty tab dialog to communicate the result (yes/no) back to the standalone BTF such that it can make a decision about aborting the close action and leaving the user on the current page fragment, or navigating to the Task-Flow-Return node?I hope everyone interested on this challenge will find the application on this link useful: http://soadev.blogspot.com/2010/08/loosely-coupled-bounded-task-flows.html
Regards,
Rommel Pino
http://soadev.blogspot.com

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