crm.fsf.org/20131203/files/sites/all/modules-new/ctools/help/context-arguments.html

   1 <p>Arguments create a context from external input, which is assumed to be a string as though it came from a URL element.</p>
   2
   3 <pre>'title' => title
   4     'description' => Description
   5     'keyword' => Default keyword for the context
   6     'context' => Callback to create the context. Params: $arg = NULL, $conf = NULL, $empty = FALSE
   7     'default' => either an array of default settings or a string which is a callback or null to not use.
   8     'settings form' => params: $form, $form_state, $conf -- gets the whole form. Should put anything it wants to keep automatically in $form['settings']
   9     'settings form validate' => params: $form, $form_state
  10     'settings form submit' => params: $form, $form_state
  11     'criteria form' => params: $form, &$form_state, $conf, $argument, $id -- gets the whole argument. It should only put form widgets in $form[$id]. $conf may not be properly initialized so always guard against this due to arguments being changed and handlers not being updated to match.
  12     + submit + validate
  13     'criteria select' => returns true if the selected criteria matches the context. params: $context, $conf
  14 </pre>