How to get and set the delta value?

Question

How can I affect the delta parameter value? Where it can be set?

I'm beginner with Drupal but know my way around PHP and other CMS apps e.g. Joomla. I've working on my first drupal module and need to create a module with multiple blocks. I know how to switch based on the $op parameter but the $delta value seems always to be the default value set in the function declaration.

How can I select which block to process and display? Can $delta be set so that when using modules subnavigation is uses delta to switch to another block view?

Thanks in advance.

Answer 1

hook_block() is used for defining a and displaying blocks. You define the delta when you are producing the data for $op='list' this is passed back to the hook when it it is called for $op='view'.

the $delta argument will therefore be whatever you define. If you define the keys in your list array as red, green and blue that is what will be passed if the block is displayed.

Maby looking at the example will help you.