.. highlight:: python :linenothreshold: 5 General APIs ============ This page lists some general signals and hooks which do not belong to a specific type of plugin but might come in handy for various plugins. HTML head injection ------------------- These two signals allow you to put code inside the HTML ```` tag of every page. One signal is for the front end, one for the back end. You will get the request as a keyword argument ``request`` and can return plain HTML. The ``request`` object will have an attribute ``event``. * ``pretix.presale.signals.html_head`` * ``pretix.control.signals.html_head`` Admin navigation ---------------- The following signals allow you to add additional views to the admin panel navigation. You will get the request as a keyword argument ``return``. Receivers are expected to return a list of dictionaries. The dictionaries should contain at least the keys ``label`` and ``url``. You can also return a fontawesome icon name with the key ``icon``, it will be respected depending on the type of navigation. You should also return an ``active`` key with a boolean set to ``True``, when this item should be marked as active. The ``request`` object will have an attribute ``event``. ``pretix.control.signals.nav_event``: The sidebar navigation when the admin has selected an event.