[Seaside] Re: Problems using Tasks and MenuDemo

[William Hubbard]

2008/2/1, William Hubbard <billhubard at gmail.com>:
>
> I'm running into problems trying to use the MenuDemo (
> http://blog.leugim.com.mx/index.php/2008/01/03/seaside-menus/) approach
> and Tasks. Take a look the following scenario:
>
> I'm using a MainComponent (like MDMain in the tutorial), and this holds a
> task instance variable to the MainTask and a content iVar for the menu item
> components (initialized with a "null" component, WAComponent) . In the go
> method I have:
>
> self loginUser ifTrue: [
>     self isolate: [
>         result := self call: WelcomeComponent new
>         (more calls here)
>     ]
> ]
>
> Therefore my UI is like this:
>
>     LoginComponent
>         |
>         |
>         true
>         |
>
> The user is ok, then shows the Menu from MainComponent (the menu is
> rendered only if the user is authenticated) and the WelcomeComponent from
> the task. (content still would be just WAComponent like the tutorial)
>
> |          |
> |          |
> | Menu |  WelcomeComponent
> |          |
>
> When I click a menu item, content needs to be replaced with the
> NewComponentFromMenu, but the WelcomeComponent is still there, displayed
> below the NewComponentFromMenu:
>
>
> |          |
> |          |
> | Menu |  NewComponentFromMenu
> |          |
> |          |
> |          |
> |          |  WelcomeComponent
> |          |
>
> I understand this happens because the MenuDemo do not use call: message,
> but I don't know how to "replace" the WelcomeComponent with the
> NewComponentFromMenu when a menu item is clicked. I tried setting the
> content iVar to the WelcomeComponent when enters the isolate: but this just
> shows two times the WelcomeComponent:
>
> |          |
> |          |
> | Menu |  WelcomeComponent
> |          |
> |          |
> |          |
> |          |  WelcomeComponent
> |          |
>
>
> Any idea how to solve this?
> Thanks



I forgot to paste the current main render method I'm using:

MainComponent>>renderContentOn: html

   ( self username isAuthenticated ] )
                ifTrue: [ html render: menu ].
       html render: content.
       html render: task
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