Enhanced program access in a graphical user interface

Abstract

A pointing system for controlling a cursor on a computer display device includes a single control actuator that ordinarily controls movement of the cursor on the display device and also detects if an applied cursor force matches a predetermined tap signature. If the applied force substantially matches the predetermined tap signature, then the system responds to the applied force by initiating one or more display actions rather than by moving the display cursor. The system detects tap signature forces applied along the x, y, and z axes of the control actuator and responds by retrieving a cursor context comprising a window display and corresponding cursor location from a queue and opening the associated window. That is, the system changes the active window from among windows of a graphical user interface, preserving the cursor position within each window. Other tap signature responses can correspond to functions initiated by programmable function keys or to user-defined functions. The force signature needed to initiate the display actions comprises a short duration, low level of force, such as a tap on the cursor control actuator that defines a sawtooth-type pulse having a rapidly rising leading edge and a slower failing trailing edge. Off-axis forces, which cannot be detected as occurring primarily along one of the three axes, are ignored to prevent. inadvertent, undirected bumping of the control actuator from initiating unwanted action.