From: Robert Zeigler <[EMAIL PROTECTED]>
Reply-To: "Tapestry users" <[email protected]>
To: Tapestry users <[email protected]>
Subject: Re: Multiple Select
Date: Thu, 14 Jul 2005 12:35:01 -0500
Yes, you can.
You'll probably want to override "equals" to perform some check other
than a==b. :)
Robert
Dan wrote:
> i m a bit confused, so sorry if this is a repeat.
> in the palette component, cant i initialize the "selected" side with a
> List of objects?
> in the pageBeginRender, i do a setXXX(List) but nothing comes up when
> the page is rendered :(
> although i got the model side working...thanks rob!
>
>> From: Robert Zeigler <[EMAIL PROTECTED]>
>> Reply-To: "Tapestry users" <[email protected]>
>> To: Tapestry users <[email protected]>
>> Subject: Re: Multiple Select
>> Date: Thu, 14 Jul 2005 10:31:38 -0500
>>
>> It's now downloadable from here:
>>
>>
http://equalitylearning.org/Tassel/app?service=external/ViewComponent&sp=SListPropertySelectionModel
>>
>>
>> Robert
>>
>> Dan wrote:
>> > aaah...yes...just realized that. could you throw in ideas/sample
>> code of
>> > your implementation of list property selection model? -thx!
>> >
>> > in the meanwhile, i fig that if any1 wanted to use the multiple
select
>> > its a very tedious task to get the items(objects) that are selected.
>> you
>> > will have to implement the isSelected() and getSelected() methods
>> inside
>> > ur java class instead of relying on the object's selected methods.
>> >
>> > theres a good example of how this multiple select works in the
>> > tiaexamples/Toppings app code in the tapestry in action src download!
>> >
>> > -Dan
>> >
>> >> From: Robert Zeigler <[EMAIL PROTECTED]>
>> >> Reply-To: "Tapestry users" <[email protected]>
>> >> To: Tapestry users <[email protected]>
>> >> Subject: Re: Multiple Select
>> >> Date: Thu, 14 Jul 2005 09:54:06 -0500
>> >>
>> >> Well, the tassel component still uses the IPropertySelectionModel
>> >> interface.
>> >>
>> >> Robert
>> >>
>> >> Dan wrote:
>> >> > I think the Tassel multiple select looks good for my app logic
right
>> >> > now. However, I m interested in looking at the
>> >> > ListPropertySelectionModel u ve written. I might get away with
>> tassels
>> >> > component this time, but if something comes up thats is better if
>> >> > implemented via the propertyselection model, then i wont ve to be
>> >> > searching for an howto example :)
>> >> >
>> >> > thanks!
>> >> >
>> >> >> From: Robert Zeigler <[EMAIL PROTECTED]>
>> >> >> Reply-To: "Tapestry users" <[email protected]>
>> >> >> To: Tapestry users <[email protected]>
>> >> >> Subject: Re: Multiple Select
>> >> >> Date: Thu, 14 Jul 2005 07:59:23 -0500
>> >> >>
>> >> >> To be honest, I don't use the select component. :) I use
>> >> >> PropertySelection, SelectMultiple,
>> >> contrib:MultiplePropertySelection, or
>> >> >> Palette, depending on my need.
>> >> >> Then I don't have to worry about the details. :)
>> >> >> I'd suggest taking the time to understand the PropertySelection
>> model,
>> >> >> because it will save you a lot of time and coding in the future.
>> >> >> I wrote a "ListPropertySelectionModel", if you're interested.
>> >> >> The items in the list have to implement a "NamedListItem" (single
>> >> >> "getItemName method), but once they do, you can just do
>> >> >> return new ListPropertySelectionModel(mylist);
>> >> >> Somebody else on here wrote something similar, using reflection
>> >> instead
>> >> >> of interfaces, so you can just specify the model as a bean. The
>> model
>> >> >> had a "label" property, or some such, that was used to
>> determine, by
>> >> >> reflection, the method to be called to grab the object label.
>> >> >>
>> >> >> Robert
>> >> >>
>> >> >> Dan wrote:
>> >> >> > Rob,
>> >> >> >
>> >> >> > Thanks for the quick reply and the palette sample.
>> >> >> > I think i m avoiding using palette cuz i cant fig out an easy
>> way to
>> >> >> > convert my java.util.List of composite objects (or watever u
call
>> >> >> > em...the ones with objects inside objects) to a
>> >> >> IPropertySelectionModel.
>> >> >> > I'll take a look at tassel. good ref! thx
>> >> >> > i m curious though to learn more about the select component
with
>> >> >> > multiple=true. So if the select component displayed a
>> collection of
>> >> >> > objects, what would be a way (in the form listener) to get hold
>> >> of the
>> >> >> > selected objects?
>> >> >> > as i mentioned b4, i iterate through all the colln objects for
>> >> >> > isSelected() to be true, but looks like setSelected() is not
>> turning
>> >> >> the
>> >> >> > flag to true...or maybe i m missing something?
>> >> >> >
>> >> >> > thanks again!
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >> From: Robert Zeigler <[EMAIL PROTECTED]>
>> >> >> >> Reply-To: "Tapestry users" <[email protected]>
>> >> >> >> To: Tapestry users <[email protected]>
>> >> >> >> Subject: Re: Multiple Select
>> >> >> >> Date: Wed, 13 Jul 2005 16:58:32 -0500
>> >> >> >>
>> >> >> >> Try the select multiple component in tassel?
>> >> >> >> Otherwise, the contrib:palette works well, too.
>> >> >> >> Using it is really about the same as using PropertySelection.
>> >> >> >> The only difference is that you're passing a (modifiable) list
>> >> instead
>> >> >> >> of a single object in.
>> >> >> >>
>> >> >> >> Here's an example...
>> >> >> >>
>> >> >> >> <select jwcid="@contrib:Palette" model="ognl:coursesModel"
>> >> >> >> selected="ognl:selectedCourses"
>> >> >> >> availableTitleBlock="ognl:components.unenrolled"
>> >> >> >> selectedTitleBlock="ognl:components.enrolled"/>
>> >> >> >>
>> >> >> >> <span jwcid="[EMAIL PROTECTED]">
>> >> >> >> Unenrolled
>> >> >> >> </span>
>> >> >> >> <span jwcid="[EMAIL PROTECTED]">
>> >> >> >> Enrolled
>> >> >> >> </span>
>> >> >> >>
>> >> >> >> Robert
>> >> >> >>
>> >> >> >> Dan wrote:
>> >> >> >> > Hi,
>> >> >> >> >
>> >> >> >> > I am newbie to tapestry. I am having problems getting the
>> >> selected
>> >> >> >> > values from a MULTIPLE select.
>> >> >> >> >
>> >> >> >> >> From googling the net and reading the docs, the method i
>> >> >> approached to
>> >> >> >> >> get
>> >> >> >> >
>> >> >> >> > the selected value from a SINGLE select list(dropwdown) is
by
>> >> >> iterating
>> >> >> >> > over the collection being rendered and check if
>> isSelected() is
>> >> >> true.
>> >> >> >> >
>> >> >> >> > example:
>> >> >> >> >
>> >> >> >> > Page spec:
>> >> >> >> >
>> >> >> >> > <select jwcid="@Select">
>> >> >> >> > <span jwcid="@Foreach" source="ognl:colorList"
>> >> value="ognl:color">
>> >> >> >> > <option jwcid="@Option" selected="ognl:color.selected"
>> >> >> >> > label="ognl:color.name"/>
>> >> >> >> > </span>
>> >> >> >> > </select>
>> >> >> >> >
>> >> >> >> > Java code:
>> >> >> >> >
>> >> >> >> > public Color getCurrentColor(){
>> >> >> >> > List l = getColorList();
>> >> >> >> > Color p;
>> >> >> >> > for (int i=0;i<l.size();i++){
>> >> >> >> > p = (Color)l.get(i);
>> >> >> >> > if (p.isSelected())
>> >> >> >> > return p;
>> >> >> >> > }
>> >> >> >> > return null;
>> >> >> >> > }
>> >> >> >> >
>> >> >> >> > I try to do similar thing with mulitple select, ie return a
>> >> List of
>> >> >> >> > objects whose isSelected() == true. But this doesnt seem to
>> >> work.
>> >> >> >> >
>> >> >> >> > Could someone please guide as to how do they retrieve the
>> >> selected
>> >> >> >> > objects from the multiple select?
>> >> >> >> >
>> >> >> >> > Also are there any contrib:palette examples out there? The
>> book
>> >> >> >> > doesnt...neither did googling help.
>> >> >> >> >
>> >> >> >> > Thanks a bunch!
>> >> >> >> >
>> >> >> >> >
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