> If only I could find a javascript ref as good as Raul's html ref:
> http://blooberry.com/indexdot/html/index2.htm !
No sooner said, than Google's AdWords offered me this link:
Developer's cheat-sheet
http://www.visibone.com/products/browserbook.html
I'm going to treat myself to it for Christmas and report back with a review.
On Wed, Dec 14, 2011 at 4:57 PM, Ian Clark <earthspo...@gmail.com> wrote:
>> I think adding support for multiple select is pretty simple. As a quick
>> experiment you could create a variant of jhselect that added the word
>> multiple in the html.
>
> You're right, it is simple, just a case of putting the attribute:
> 'multiple' into the <select tag. See my first post, where I create a
> variant of jhselect called jhselectmultiple. This works fine.
>
> It's the second part of the task that's foxed me, exploring javascript
> to detect and find the multiple selections that have been made.
>
> If only I could find a javascript ref as good as Raul's html ref:
> http://blooberry.com/indexdot/html/index2.htm !
>
> It intrigues me that whoever in Sun designed the selectedIndex feature
> in javascript (or DOM) didn't think to generalize it to accommodate
> the Multiple attribute in <select. Or didn't bother... (but that's me,
> grousing again!)
>
> I see the Wikipedia article on javascript contains the quote:
> "Anyway I know only one programming language worse than C and that is
> Javascript. [...] "
> ...a rank slander on C, which I'm very fond of.
>
>
> On Wed, Dec 14, 2011 at 4:34 PM, Eric Iverson <eric.b.iver...@gmail.com>
> wrote:
>> I think adding support for multiple select is pretty simple. As a quick
>> experiment you could create a variant of jhselect that added the word
>> multiple in the html. Not sure of the details,but something like:
>>
>> <select multiple ....> instead of the <select ...>
>>
>> If this works in the sense that it gives you the gui you want, then you
>> then need to figure out how the events are triggered for multiple selection
>> but I don't think that would be too hard.
>>
>> On Wed, Dec 14, 2011 at 11:29 AM, Ian Clark <earthspo...@gmail.com> wrote:
>>
>>> Thanks, Eric.
>>>
>>> I guess I was trawling for a simple-stupid answer, to save doing it
>>> the hard way.
>>>
>>> I'd thought of a table of checkboxes, but since the list to be checked
>>> is scrollable (and individual items can be hidden) it's not so
>>> straightforward.
>>>
>>> Fortunately, in this particular instance, it's easy to arrange for the
>>> engine which governs the list to accumulate selections, and flag them
>>> with stars, so that's the way I'll go. It demands nothing clever from
>>> the gui, which IME is always a good idea for a portable app.
>>>
>>> On Wed, Dec 14, 2011 at 2:59 PM, Eric Iverson <eric.b.iver...@gmail.com>
>>> wrote:
>>> > There is a "select multiple" html tag. You'll have to dig into the html
>>> and
>>> > javascript docs on this and provide new jhs wrappers to make it easy to
>>> use
>>> > from J. I think the code will be trivial but the homework to figure out
>>> the
>>> > code will be more difficult. Depending on the app requirements a table of
>>> > checkboxes is another way to go (see jal for an example of this).
>>> >
>>> > On Wed, Dec 14, 2011 at 3:24 AM, Ian Clark <earthspo...@gmail.com>
>>> wrote:
>>> >
>>> >> Trying to port a j6 jwd app to j7 jhs. It has a listbox accepting
>>> >> multiple selections, defined like this:
>>> >>
>>> >> xywh 5 16 244 100;cc panel listbox ws_vscroll lbs_multiplesel
>>> >> rightmove bottommove;
>>> >>
>>> >> The JHS framework offers a verb: jhselect to generate a Select object,
>>> >> which IMO is the thing to use in its place. But it only allows single
>>> >> lines to be selected.
>>> >>
>>> >> How do I get multiple selections, *plus* reading back what lines are
>>> >> selected?
>>> >>
>>> >> If I define a variant (the only difference from jhselect being that
>>> >> I've inserted 'multiple' in line 1) ...
>>> >>
>>> >> jhselectmultiple=: 4 : 0
>>> >> 'values size sel'=. y
>>> >> t=. '<select id="<ID>" name="<ID>" class="jhselect" size="<SIZE>"
>>> >> multiple onchange="return jev(event)" >'
>>> >> t=. t hrplc 'ID SIZE SEL';x;size;sel
>>> >> opt=. '<option value="<VALUE>" label="<VALUE>"
>>> <SELECTED>><VALUE></option>'
>>> >> for_i. i.#values do.
>>> >> t=. t,opt hrplc'VALUE
>>> >> SELECTED';(i{values),(i=sel){'';'selected="selected"'
>>> >> end.
>>> >> t=. t,'</select>'
>>> >> )
>>> >>
>>> >> and call it in HBS with a line like this:
>>> >>
>>> >> 'sel' jhselectmultiple sel_text ; sel_size ; sel_index
>>> >>
>>> >> then this does indeed generate a Select object with id="sel" which
>>> >> accepts multiple selections.
>>> >>
>>> >> However, I can only see the first selection, using this javascript
>>> >> function (borrowed from jdemo4):
>>> >>
>>> >> function ev_sel_change()
>>> >> {
>>> >> jbyid("which").innerHTML= JEV+" : "+jbyid("selm").selectedIndex;
>>> >> }
>>> >>
>>> >> I don't know the DOM well enough to know what I should be using instead.
>>> >>
>>> >> I've tried googling for selectedIndex and get this link:
>>> >> http://www.javascriptkit.com/jsref/select.shtml
>>> >> but it merely confirms that the above is the behavior of selectIndex
>>> >> when 'multiple' is specified, without suggesting what to use instead.
>>> >>
>>> >> (Does anyone know a better DOM reference link?)
>>> >> ----------------------------------------------------------------------
>>> >> For information about J forums see http://www.jsoftware.com/forums.htm
>>> >>
>>> > ----------------------------------------------------------------------
>>> > For information about J forums see http://www.jsoftware.com/forums.htm
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>>
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
