Ending all callbacks/calls

Hello,

I'm trying to add a "home" link/button to our application, which will
return the user to the page after login, whilst not leaving a trail of
calls/callbacks "hanging" in memory.

We are using several tasks for some parts of this application, so I'll
make a cut-down example.

Root>>go
  self call: TaskA

TaskA>>go
  self call: Component

Component>>renderContentOn: html
  html anchor callback: [ self session goHome ]; with: 'Home'


What I have tried so far, is subclassing the session, and task and
component with the following overrides:

Task/Component>>call: aComponentOrTask
  self session addCall: aComponentOrTask.
  ^super call: aComponentOrTask.

Task/Component>>answer: anObject.
  self session removeCall: self.
  ^super answer: anObject

Session>>addCall: aComponentOrTask
  calls add: aComponentOrTask

Session>>removeCall: aComponentOrTask
  calls remove: aComponentOrTask

Session>>goHome
  calls do: [ :each | each answer: nil ]


However, the process will only send #answer: to the first component due
to the continuations (I think.)

Does anyone know of a way to effectively reset the application state to
a specific callback?

Many thanks,
--
John Thornborrow
http://www.pinesoft.co.uk


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Are you aware of WAComponent>>home, it does exactly this.  Sending home to
any component removes all decorations from it.

Ramon Leon
http://onsmalltalk.com

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That would still have issues, would it not?

How would (from my example) Component know to return to TaskA?

Many thanks,
John

Ramon Leon wrote:
--
John Thornborrow
http://www.pinesoft.co.uk


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>
> That would still have issues, would it not?
>
> How would (from my example) Component know to return to TaskA?
>
> Many thanks,
> John

If you want Component to return to taskA, then you have component tell taskA
#home, taskA will then remove all its decorations.  To keep it simple,
consider the idea of a current home component available globally on the
session...

Root>>go
  | homeComponent |
  homeComponent := TaskA new.
  self session homeComponent: homeComponent.
  self call: homeComponent

TaskA>>go
  self call: Component new.

Component>>renderContentOn: html
  html anchor callback: [ self session homeComponent home ]; with: 'Home'

Ramon Leon
http://onsmalltalk.com

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Sounds good, I'll use that.

Thanks Ramon.

John

Ramon Leon wrote:
--
John Thornborrow
http://www.pinesoft.co.uk


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