Question about Section 12.2 of the Seaside book
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Question about Section 12.2 of the Seaside book
 
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Hello,
I've been going through the Seaside online book and so far everything has been intuitive and straightforward. At the very end of section 12.2 (Example: Embedding an Editor) there is a note that says:
Our simple implementation of
IAddress>>editContact: will save changes even when you press cancel. See Section 11.5 to understand how you can change this.In the context of section 11.5, ContactListView is 'call:'ing the editor and testing the return value to decide whether or not to save the changes. This is very straightforward.
In the context of section 12.2, IAddress is embedding the editor and thus it is not clear or intuitive where I would test the return value of the editor to decide whether or not to save the changes. I'm sure this is an easy question for the season veterans, but I'm just not seeing it.
Thanks in advance for any help, pointers, etc...
Elliot
P.S. This is using the Seaside 3.0 One-click on a Macbook Pro (OS X 10.6.4).
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Re: Question about Section 12.2 of the Seaside book
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On 10/21/2010 3:49 PM, Elliot Finley wrote:
> In the context of section 12.2, IAddress is embedding the editor and > thus it is not clear or intuitive where I would test the return value of > the editor to decide whether or not to save the changes. I'm sure this > is an easy question for the season veterans, but I'm just not seeing it. See http://book.seaside.st/book/in-action/todo/embeddingchildren Specifically the #onAnswer: block given to the component when it's created. -- Ramon Leon http://onsmalltalk.com _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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In reply to this post by Elliot Finley
Hi Elliot,
The editor is a form whose fields are bound to the object it is editing, and the submit button (whether the Cancel or Save button) will perform the form's input field callbacks first (see Section 10.1).
Hope this helps John On Thu, Oct 21, 2010 at 6:49 PM, Elliot Finley <[hidden email]> wrote: Hello, -- http://john-mckeon.us _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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This means the editor needs to operate on a copy of the object.
On Thu, Oct 21, 2010 at 6:32 PM, John McKeon <[hidden email]> wrote: Hi Elliot, _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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In reply to this post by Ramon Leon-5
On Thu, Oct 21, 2010 at 5:31 PM, Ramon Leon <[hidden email]> wrote:
Ramon, Thanks for this. I was able to get it working with this information. My next question is: How do we correct the book? It references a previous section of the book that doesn't have the correct info in this context.
Elliot _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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In reply to this post by Elliot Finley
On Fri, Oct 22, 2010 at 8:31 PM, Elliot Finley <[hidden email]> wrote: This means the editor needs to operate on a copy of the object. Yes, and the only place you can put code to deal with the copy is in the button callbacks. In this configuration though, answer: is of no use. You would need to do something else...
-- http://john-mckeon.us _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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On Fri, Oct 22, 2010 at 6:37 PM, John McKeon <[hidden email]> wrote:
This is how I did it. I'm a Smalltalk beginner, so there is probably a much better way.
IAddress>>initialize super initialize. editor := ContactView new.
self editContact: self contacts first. editor onAnswer: [ :answer | answer ifTrue: [ self save ] ifFalse: [ self cancel ] ]
IAddress>>editContact: aContact contactCurrentlyBeingEdited := aContact. editor contact: aContact copy.
IAddress>>save Contact removeContact: contactCurrentlyBeingEdited; addContact: editor contact IAddress>>cancel self editContact: contactCurrentlyBeingEdited. _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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Wow I stand corrected. I had no idea you could answer: from a component that hadn't been called. You learn something new every day.
Back to reading.... On Fri, Oct 22, 2010 at 9:02 PM, Elliot Finley <[hidden email]> wrote:
-- http://john-mckeon.us _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: Question about Section 12.2 of the Seaside book
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In reply to this post by Elliot Finley
On 10/22/2010 5:34 PM, Elliot Finley wrote:
> Thanks for this. I was able to get it working with this information. > My next question is: How do we correct the book? It references a > previous section of the book that doesn't have the correct info in this > context. > > Elliot Put your notes at the bottom of that page in the book in case anyone else trips up on this, and then perhaps contact one of the authors to see if they'll make a correction. -- Ramon Leon http://onsmalltalk.com _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
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