Re: [Tapestry-developer] DirectLink

[Howard M. Lewis Ship]

Seems to me you could implement an MapArea component pretty easily.  Have it take a listener and all that ... just like an DirectLink.   Basically, you can get the right IEngineService from the IEngine.   You can get a Gesture from the service.   The Gesture will provide you with the URL.   ----- Original Message ----- From: David Solis To: 'Tapestry Developer' Sent: Thursday, December 05, 2002 1:27 PM Subject: [Tapestry-developer] DirectLink Hello,   I�ve a page which contains an image map and each area has associated an action, in fact a direct action.   The  implementation is:   HTML <span jwcid="hiddenZone"> <a jwcid="link">link</a> </span> <img jwcid="bottomImage" src="/images/bottom.jpeg" border=0 usemap="#buttons" width="426" height="258"/>   <map name="buttons">   <area shape="rect" coords="324,124,371,204" href="calculator?service=direct&context=Home/link&sp=Sclear" alt="Clear"/>   <area shape="rect" coords="262,124,308,203" href="calculator?service=direct&context=Home/link&sp=Splus" alt="Plus"/>   <area shape="rect" coords="325,79,370,112" href="calculator?service=direct&context=Home/link&sp=Snegate" alt="Negate"/>   <area shape="rect" coords="324,33,368,67" href="calculator?service=direct&context=Home/link&sp=Sdivide" alt="Divide"/>   <area shape="rect" coords="262,77,308,112" href="calculator?service=direct&context=Home/link&sp=Sminus" alt="Subtract"/>   <area shape="rect" coords="261,34,308,66" href="calculator?service=direct&context=Home/link&sp=Stimes" alt="Times"/>   <area shape="rect" coords="192,171,250,204" href="calculator?service=direct&context=Home/link&sp=Sequals" alt="Equals"/>   <area shape="rect" coords="132,170,179,205" href="calculator?service=direct&context=Home/link&sp=Spoint" alt="Point"/> </map>   Page     <component id="hiddenZone" type="Conditional"/>     <component id="link" type="DirectLink">         <binding name="listener" expression='listeners.processButton'/>     </component>     <component id="bottomImage" type="Image">         <binding name="image" expression='assets.bottomImage'/>     </component>     <context-asset name="bottomImage" path="/images/bottom.jpeg"/>   I had to  declare a DirectLink even though it�s invisible and I encoded the URL for each area by hand. From my point of view this is ugly and depends on Tapestry internals. We�ve a menu implemented with javascript and used the same technique to solve this. My concern is why the DirectLink is just for html links? � Yes, I know this is a silly question; I guess these cases probably are exceptions for many applications, however I�m wondering if there is a general method to deal with direct actions?   Is there a better way to encode the href elements?     Regards   David