Re: Issues with Label Components with Tapestry 4.0

> 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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