How to add calendar controls to a Joomla administrator component

Being home during summer holiday means doing some “home development”. Being forced to do a re-make of the feestbordindetuin I found a nice component for showing products and categories (DJ Catalog), without having to implement a whole e-commerce-solution. One of the disadvantages is that is doesn’t support the administration of customers and reservations so I Read more about How to add calendar controls to a Joomla administrator component[…]