[ADD] WASelectTag>>enablementBlock

If you ever needed to build a list with certain elements that aren't
supposed to be selectable, here's a change that lets you do the
following,

(html select)
 list: self countyChoices;
 selected: self country;
 enablementBlock: [:ea | ea notNil];
 labels: [:ea | ea
                 ifNil: ['-----------------------------']
                 ifNotNil: [ea description]];
 callback: [:value | self country: value]

where #countryChoices returns a collection of countries separated by nil
into section with most popular countries and the rest underneath.

Changes,

WASelectTag>>enablementBlock: aBlock
 enablementBlock := aBlock

WASelectTag>>isDisabled: option
 ^enablementBlock notNil and: [(enablementBlock value: option) not]

WASelectTag>>optionsOn: html
 ...
 brush := (html option)
                disabled: (self isDisabled: each);
                selected: (self isSelected: each);
                yourself.
 ...

Hope this gets integrated at some point :)

Cheers!

-Boris

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One additional improvement to follow up is the change that makes sure
that single-selection lists don't try to render multiple 'selected'
options (in my case, top 15 countries where we ship appear as duplicates
in a separate group on top of the list, but are repeated again further
down for consistency),

I bet Outlook will mess up the format big time, my apologies,

optionsOn: html
        | brush registeredSelection |
        self isOptional
                ifTrue:
                        [brush := (html option)
                                selected: selected isNil;
                                yourself.
                        self hasCallback ifTrue: [brush callback:
[callbackBlock value: nil]].
                        brush with: optionalLabel].
        registeredSelection := false.
        list
                do:
                        [:each |
                        brush := html option.
                        (self isDisabled: each) ifTrue: [brush
disabled].
                        ((self isMultiple or: [registeredSelection not])
and: [self isSelected: each])
                                ifTrue:
                                        [brush selected: true.
                                        registeredSelection := true].
                        self hasCallback
                                ifTrue:
                                        [brush
                                                callback:
                                                        [self isMultiple
                                                                ifTrue:
[selected add: each]
                                                                ifFalse:
[callbackBlock value: each]]].
                        brush with: (self labelForOption: each)]

Cheers!

-Boris

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Vancouver, Canada V6C 2T5
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> -----Original Message-----
> From: Boris Popov
> Sent: Monday, March 26, 2007 5:27 PM
> To: 'Seaside - general discussion'
> Subject: [ADD] WASelectTag>>enablementBlock
>
> If you ever needed to build a list with certain elements that aren't
> supposed to be selectable, here's a change that lets you do the
following, nil
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Boris --

This sounds like something I was dealing with a while back and did some
ugly hacks to deal with.. In my case I had several drop-downs with the
initial selected item being something like "select one" -- but, I didn't
want that one item actually selected.. This code sounds like it might
work in this manner.. I'll check it out -- keeps the hacks away!

Thanks!

-- Rick

Boris Popov wrote:
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Not sure what your scenario was exactly, but here I have a list that
goes,

Canada
US
---- (disabled)
Armenia
...
Canada
...
US
...
Zimbabwe

in which case 'selected' <option> came up twice during rendering phase
if you'd selected one of the duplicated countries on top and most
browsers would assume it's the latter one you want, so by correcting it
I fix two issues: semantically single list should only have one
'selected' option, but practically if you pick Canada, I want the list
to highlight Canada in the top portion, not the lower one.

Hope this helps,

-Boris

--
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DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5
http://tinyurl.com/r7uw4

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Thank you.
some
> ugly hacks to deal with.. In my case I had several drop-downs with the
> initial selected item being something like "select one" -- but, I
didn't
> want that one item actually selected.. This code sounds like it might
> work in this manner.. I'll check it out -- keeps the hacks away!
>
> Thanks!
>
> -- Rick
>
> Boris Popov wrote:
> > One additional improvement to follow up is the change that makes
sure
> > that single-selection lists don't try to render multiple 'selected'
> > options (in my case, top 15 countries where we ship appear as
duplicates
> > in a separate group on top of the list, but are repeated again
further _______________________________________________
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Boris Popov wrote:
your usage scenario is different than mine is certainly, but I think
this will work in my case as well.. When I try it out, I'll let you
know.. One of my hacks was putting dummy records in my database as
placeholders (major hack).. I ultimately wanted a cleaner way to do it
and this may be it.. However, I may not be able to try it out for a week
or so as I've got to get my taxes done first.. (8-<

Thanks Boris!
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