Global and contextual vehicle computing system controls

1. A system comprising:

a display;

global controls, each associated with a different one of a plurality of user interface screens of a vehicle to be provided to the display;

contextual controls, each associated with a command function available from a selected one of the plurality of user interface screens; and

a vehicle processor configured to

provide a first one of the screens to the display,

responsive to receipt of a button press of a global control associated with a second one of the screens, transition the contextual controls to command functions available from the second one of the screens and display contextual navigation indications to illustrate the available command functions of the second one of the screens,

responsive to release of the global control within a predefined time period, provide the second one of the screens to the display,

responsive to continued button press of the global control beyond the predefined time period, continue to provide the first one of the screens to the display along with continued display of the contextual navigation indications to illustrate the available command functions of the second one of the screens, and

responsive to release of the global control beyond the predefined time period, transition the contextual controls back to command functions available from the first one of the screens.

2. The system of claim 1 , wherein the vehicle processor is further configured to provide to the display, in an orientation consistent with that of the global controls, global navigation indications indicating a relationship between the global controls and associated user interface screens.

3. The system of claim 1 , wherein the vehicle processor is further configured to provide to the display, in an orientation consistent with that of the contextual controls, the contextual navigation indications of the command functions currently associated with the contextual controls.

4. The system of claim 1 , wherein the vehicle processor is further configured to:

receive an indication of a user input press of one of the contextual controls;

identify a command function currently associated with the one of the contextual controls; and

perform the command function.

5. A method comprising:

displaying a first screen;

responsive to a press of a global control corresponding to a second screen, updating command functions for contextual controls and contextual navigation indications to command functions of the second screen;

upon receiving a release of the global control within a predetermined threshold period of time, navigating to the second screen;

responsive to continued button press of the global control beyond the period of time, continue to provide the first screen to the display along with continued display of the contextual navigation indications to illustrate the available command functions of the second screen; and

upon receiving the release after the period of time, reverting the command functions to those of the first screen.

6. The method of claim 5 , further comprising displaying, in an orientation consistent with that of the global control, global navigation indications indicating a relationship between the global control and associated user interface screens.

7. The method of claim 5 , further comprising displaying, in an orientation consistent with that of the contextual controls, the contextual navigation indications of the command functions associated with the contextual controls for the user interface screen.

8. The method of claim 5 , further comprising:

receiving an indication of a user input press of one of the contextual controls;

identifying a command function currently associated with the one of the contextual controls; and

performing the command function.

9. The method of claim 5 , wherein the predetermined threshold period of time is one second.

10. A system comprising:

a vehicle processor configured to

provide a first screen to a vehicle display;

responsive to receiving an indication of a user input press of a global control of a steering wheel corresponding to a second screen, update command functions associated with contextual controls of the steering wheel and contextual navigation indications in accordance with command functions available from the second screen;

upon receiving a user input release of the global control within a predetermined threshold period of time, navigate the vehicle display to the second screen;

responsive to continued button press of the global control beyond the threshold period of time, continue to provide the first screen to the display along with continued display of the contextual navigation indications to illustrate the available command functions of the second screen; and

upon receiving the release after the period of time, revert the command functions to those of the first screen.

11. The system of claim 10 , wherein the vehicle processor is further configured to display, in an orientation consistent with that of the global controls, global navigation indications indicating a relationship between the global controls and associated user interface screens.

12. The system of claim 10 , wherein the vehicle processor is further configured to display, in an orientation consistent with that of the contextual controls, the contextual navigation indications of the command functions associated with the contextual controls.

13. The system of claim 10 , wherein the vehicle processor is further configured to:

receive an indication of a user input press of one of the contextual controls;

identify a command function currently associated with the one of the contextual controls; and

perform the command function.

14. The system of claim 10 , wherein the predetermined threshold period of time is one second.

15. The system of claim 10 , wherein the vehicle display includes at least one of: (i) a display of a head unit of the vehicle, (ii) a display within a gauge cluster of the vehicle, and (iii) a secondary display screen of the vehicle configured to be within view of a driver of the vehicle.