Force vector cursor control

1. An apparatus comprising:

a force sensor operatively coupled to a surface;

a touch sensor operatively coupled to the surface, the touch sensor measuring a touch location of the user touch;

a processor;

a memory that stores code executable by the processor to:

measure a force vector input by a user touch at the surface, the force vector including a magnitude and a direction;

monitor an amount of movement corresponding to the user touch;

monitor an amount of time corresponding to the user touch;

translate the magnitude into a cursor velocity;

switch to a pressure-based cursor control mode in response to an amount of force corresponding to the user touch exceeding a threshold amount of force, the amount of time exceeding a threshold amount of time, and the amount of movement corresponding to the user touch not exceeding a threshold amount of movement;

switch to a position-based cursor control mode in response to the amount of movement exceeding the threshold amount of movement and the amount of time exceeding a threshold amount of time; and

control movement of a cursor based on the cursor velocity and the direction of the force vector in response to switching to the pressure-based cursor control mode.

2. The apparatus of claim 1 , wherein measuring the force vector comprises the processor:

determining a finger tilt corresponding to the force vector input; and

computing a direction component based on the finger tilt.

3. The apparatus of claim 1 , wherein measuring the force vector comprises the processor:

determining a contact area corresponding to the force vector input, the contact area corresponding to an area of the surface being touched; and

computing a direction component based on a geometry of the contact area.

4. The apparatus of claim 1 , wherein measuring the force vector comprises the processor:

detecting two or more simultaneously input force vectors;

selecting a gesture command based on the simultaneously input force vectors; and

controlling a user interface based on the selected gesture command.

5. The apparatus of claim 1 , wherein the touch location indicates a location on the surface corresponding to the user touch, wherein the processor further:

designates a button region on the surface based on the touch location; and

controls a user interface based on one or more additional touches at the button region.

6. The apparatus of claim 1 , wherein the processor further dynamically switches between a position-based cursor control mode and pressure-based cursor control mode based on user input.

7. The apparatus of claim 1 , wherein the surface comprises a designated region, wherein the processor further:

determines whether a user is touching the designated region, the designated region being selected from the group consisting of: a visually marked region, a protruding region, and a textured region,

wherein measuring the force vector occurs in response to the user touching the designated region.

8. A method comprising:

measuring, by use of a processor, a force vector input by a user touch at a surface;

monitoring an amount of movement corresponding to the user touch;

monitor an amount of time corresponding to the user touch;

mapping a magnitude of the force vector into a cursor velocity;

switching to a pressure-based cursor control mode in response to the magnitude of the force vector exceeding a threshold amount of force, the amount of time exceeding a threshold amount of time, and the amount of movement corresponding to the user touch not exceeding a threshold amount of movement;

switching to a position-based cursor control mode in response to the amount of movement exceeding the threshold amount of movement and the amount of time exceeding a threshold amount of time; and

controlling movements of a cursor using the cursor velocity and a direction of the force vector in response to switching to the pressure-based cursor control mode.

9. The method of claim 8 , further comprising:

identifying a touch location on the surface corresponding to the user-input force vector;

designating a button region on the surface based on the touch location; and

controlling a user interface based on one or more additional touches at the button region.

10. The method of claim 8 , wherein measuring the force vector comprises:

determining a finger tilt corresponding to the force vector input; and

computing a direction component based on the finger tilt.

11. The method of claim 8 , wherein measuring the force vector comprises:

determining a contact area corresponding to the user touch, the contact area corresponding to an area of the surface being touched; and

computing a direction component based on a geometry of the contact area.

12. The method of claim 8 , wherein measuring the force vector comprises:

detecting two or more simultaneously input force vectors;

selecting a gesture command based on the simultaneously input force vectors; and

controlling a user interface based on the selected gesture command.

13. The method of claim 8 , further comprising switching dynamically between the position-based control mode of the cursor and the force-based control mode of the cursor based on user input.

14. A program product comprising a computer readable storage medium that is not a transitory signal and that stores code executable by a processor, the executable code comprising code to:

measure a force vector input by a user touch at a surface, the force vector comprising a perpendicular component and a parallel component, wherein the perpendicular component represents an amount of force applied in a direction perpendicular to the surface and the parallel component represents an amount of force applied in a direction parallel to the surface;

measure a touch location of the user touch and an amount of movement corresponding to the user touch;

monitor an amount of time corresponding to the user touch;

translate a magnitude of the perpendicular component of the force vector into a cursor velocity, wherein translating the magnitude into a cursor velocity comprises using one of a linear mapping of magnitude to cursor velocity and a non-linear mapping of magnitude to cursor velocity; and

control movements of a cursor according to a position-based control mode in response to the amount of movement exceeding a threshold amount of movement and the amount of time exceeding a threshold amount of time; and

controls movements of the cursor according to a pressure-based control mode in response to an amount of force corresponding to the user touch exceeding a threshold amount of force, the amount of time exceeding a threshold amount of time, and the amount of movement corresponding to the user touch not exceeding a threshold amount of movement,

wherein controlling movements of the cursor according to a pressure-based control mode comprises moving the cursor using the cursor velocity and a direction of the parallel component of the force vector.

15. The program product of claim 14 , further comprising code to:

identify a touch location on the surface corresponding to the user-input force vector;

designate a button region on the surface based on the touch location; and

control a user interface based on one or more additional touches at the button region.

16. The program product of claim 14 , further comprising code to:

switch dynamically between a position-based control mode of the cursor and a force-based control mode of the cursor based on user input.

17. The program product of claim 14 , further comprising code to:

determine whether a user is touching a designated region of the surface, wherein measuring the force vector occurs in response to the user touching the designated region.

18. The apparatus of claim 1 , wherein the processor controls movement of the cursor based on the amount of movement corresponding to the user touch in response to switching to the position-based cursor control mode.

19. The apparatus of claim 1 , wherein translating the magnitude into a cursor velocity comprises using a non-linear mapping of magnitude to cursor velocity.