Re: Issues with Label Components with Tapestry 4.0

> Andreas Andreou wrote:
>
>> try component.getBinding("class")
>> if that's not null, do a getObject() on it
>
>
> Thanks.  This works, but it also prints out duplicate "class" attributes.
>
> class="text large error" class="text large"
>
>
> It'd be nice to have something like:
>
> writer.appendAttribute("class", "values to append");
>
> Another question - it seems my full <label> and <input> is getting
> wrapped with
>
> <font color="red">
>
> Is there anyway to get rid of that?  It's problematic b/c the closing
> </font> isn't getting rendered until right before </form>.

>
> Thanks,
>
> Matt
>
>>
>> Matt Raible wrote:
>>
>>> Hmmm, I'm guessing the answers to my questions below are "no, this
>>> isn't possible." ;-)
>>>
>>> Here's another question - is it possible in my custom Validator to
>>> get the existing CSS classes on a component?  For example, I
>>> currently have:
>>>
>>>    public void writeLabelAttributes(IMarkupWriter writer,
>>> IRequestCycle cycle, IFormComponent component) {
>>>        if (isInError(component)) {
>>>            writer.attribute("class", "error");
>>>        }
>>>    }
>>>
>>>    public void writeAttributes(IMarkupWriter writer, IRequestCycle
>>> cycle,
>>>                                IFormComponent component, IValidator
>>> validator) {
>>>        if (isInError()) {
>>>            writer.attribute("class", "error");
>>>        }
>>>    }
>>>
>>> But I'd prefer to have something like this:
>>>
>>>    public void writeLabelAttributes(IMarkupWriter writer,
>>> IRequestCycle cycle, IFormComponent component) {
>>>        if (isInError(component)) {
>>>            writer.attribute("class", "error " +
>>> component.getAttribute("class"));
>>>        }
>>>    }
>>>
>>>    public void writeAttributes(IMarkupWriter writer, IRequestCycle
>>> cycle,
>>>                                IFormComponent component, IValidator
>>> validator) {
>>>        if (isInError()) {
>>>            writer.attribute("class", "error " +
>>> component.getAttribute("class"));
>>>        }
>>>    }
>>>
>>> In other words, is there a method on component that allows me to get
>>> the current CSS classes?
>>>
>>> Matt
>>>
>>> Matt Raible wrote:
>>>
>>>> I have two different "Label" components I'm trying to create.
>>>> Issue #1
>>>> ---------------------------
>>>> The first is a simple component (just a Label.jwc and Label.html
>>>> file in WEB-INF) that writes a <label>.  I'd like to include the
>>>> option to write a "required" indicator.  However, I'm having a
>>>> difficult time retrieving a parameter's value.  Here's what I have
>>>> so far:
>>>>
>>>> Label.jwc
>>>> <component-specification allow-informal-parameters="yes">
>>>>    <parameter name="key" required="yes"/>
>>>>    <parameter name="class" required="no"/>
>>>>    <component id="label" type="Any"
>>>> inherit-informal-parameters="yes"/>
>>>> </component-specification>
>>>>
>>>> Label.html
>>>> <label jwcid="label"><span jwcid="@Insert"
>>>> value="ognl:getMessages().getMessage(key)"/> <div jwcid="@If"
>>>> condition="ognl:class == 'required'"><span class="req">
>>>> *</span></label>
>>>>
>>>> I'm pretty sure "class" won't work as a parameter name b/c I've
>>>> seen a stacktrace using this already.  Regardless, let's pretend it
>>>> does (I've tried using other names).  Here's the desired usage:
>>>>
>>>> <label class="required desc" jwcid="@Label" for="phoneNumber"
>>>> key="user.phoneNumber">Phone Number</label> produces:
>>>>
>>>> <label class="desc" jwcid="@Label" for="phoneNumber">Phone
>>>> Number<span class="req"> *</label>
>>>>
>>>> I'm fine with the result having class="required desc" - I basically
>>>> just need some indicator to show a field is required when I'm not
>>>> wiring up it's input field as a component.
>>>>
>>>> Issue #2
>>>> ---------------------------
>>>> I'm overriding ValidationDelegate in order to add required field
>>>> indicators.  I used to be pre-pending an asterisk to the beginning
>>>> of the field, and I had that working.  Now I want to add <span
>>>> class="req"> to the end of the <label> before the </label> shows
>>>> up.  I'm using @FieldLabel and everything *almost* works. I've
>>>> eliminating error styling in the class below so it's easier to read.
>>>>
>>>> public class Validator extends ValidationDelegate {
>>>>    public void writeLabelSuffix(IFormComponent component,
>>>>                                 IMarkupWriter writer, IRequestCycle
>>>> cycle) {
>>>>        if (component.isRequired()) {
>>>>            writer.begin("span");
>>>>            writer.attribute("class", "req");
>>>>            writer.printRaw(" *");
>>>>            writer.end();
>>>>        }
>>>>    }
>>>>
>>>> The code above results in <label>blah blah</label><span
>>>> class="req"> *</span>, when I'd rather have the <span> w/in the
>>>> <label>.  I tried overriding writeLabelAttributes(), but that
>>>> doesn't seem to allow me to create a new tag and write it out w/in
>>>> the label.  Am I missing something here?  Has anyone done something
>>>> like this - or knows how to add a <span> withing an @FieldLabel?
>>>>
>>>> Thanks,
>>>>
>>>> Matt
>>>>
>>>>
>>>>
>>>
>>>
>>>
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