[TYPO3-core] RFC #8890: Feature: hook in function "getSingleField_SW" before rendering of single fields in tceforms.

[alex widschwendter]

This is an SVN patch request.

Type: New feature

Bugtracker references:
http://bugs.typo3.org/view.php?id=8890

Branches:
TYPO3_4-2 and trunk

Problem:
existing hooks do not allow manipulation of the $PA array

Solution:
the hook can be used to add addtional config options in the tca array, 
to in influence the rendering of the field.

Notes:
i used it to render some fields "readOnly" based on logged in be_user. ex:

function getSingleField_beforeRender($table,$field,$row,&$PA) {

         if (is_array($PA['fieldConf']['config']['readOnlyGroups'])) {
             if 
(count(array_intersect($PA['fieldConf']['config']['readOnlyGroups'], 
$GLOBALS['BE_USER']->userGroupsUID))>0) {
                 $PA['fieldConf']['config']['readOnly'] = true;
             }
         }
     }

TIA alex
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