[Jakarta-tapestry Wiki] Update of "CheckingForRequiredValidator" by HowardLewisShip

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The following page has been changed by HowardLewisShip:
http://wiki.apache.org/jakarta-tapestry/CheckingForRequiredValidator

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                }
  }}}
  
+ 
+ HowardLewisShip:  In Tapestry 4.0, IFormComponent has a isRequired() method 
for this purpose. Iternally, it's kind of like your solution (but doesn't using 
OGNL or reflection).
+ 
+ {{{
+ public void writeSuffix(IMarkupWriter writer, IRequestCycle cycle, 
IFormComponent component, IValidator validator) {
+                        
+               if(field.isRequired()) {
+                       writer.printRaw("&nbsp");
+                       writer.begin("span");
+                       writer.attribute("class", "required-marker");
+                       writer.beginEmpty("img");
+                       writer.attribute("src","images/required.jpg");
+                       writer.attribute("alt","required field");
+                       writer.attribute("align","middle");
+                       writer.end();
+               }
+               
+               if(isInError()) {
+                       writer.printRaw("&nbsp");
+                       writer.beginEmpty("img");
+                       writer.attribute("align","middle");
+                       writer.attribute("src","images/warning_icon.gif");
+               }
+ }}}
+ 

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