I have to create a vertical menu using clutter in C. Can anyone help me how to implement focus shift using the navigation keys for the menu where i want to highlight the focused menu option.
Shift focus by navigation key using clutter toolkit in c?
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the easiest way is to mark the actor that contains all the menu items as reactive, assign to it the key focus using
clutter_actor_grab_key_focus()and connect to thekey-press-eventsignal. then you can useclutter_event_get_key_symbol()on theClutterEventpassed to the signal and match it agains key symbols likeCLUTTER_KEY_DownorCLUTTER_KEY_Up.then there's even the possibility to use
ClutterBindingPoolto handle tuples of (key symbol, modifier) and assign them to a specific callback function.for more information, see the API reference:
http://developer.gnome.org/clutter/stable/ClutterActor.html#clutter-actor-grab-key-focus http://developer.gnome.org/clutter/stable/ClutterActor.html#ClutterActor-key-press-event http://developer.gnome.org/clutter/stable/clutter-Events.html#clutter-event-get-key-symbol http://developer.gnome.org/clutter/stable/clutter-Key-Bindings.html
the list of key symbols in in the clutter-keysyms.h header:
http://git.gnome.org/browse/clutter/tree/clutter/clutter-keysyms.h
there are various recipes in the Cookbook as well:
https://developer.gnome.org/clutter-cookbook/stable/events-handling-key-events.html