Problems
A common problem of pointing sticks is the inability to identify the zero position (the position indicating no user touch). A typical solution, which reflects the fact that user operation of the pointing stick is rarely constant, is to interpret any absence of change of pressure (over a given interval, perhaps one or several seconds) as meaning the user has released the stick.
If the user applies exactly constant pressure to the stick for such an interval, this method mistakenly re-zeroes the stick. Then additional pressure is required to achieve the same movement of the screen cursor, and the cursor spontaneously moves in the opposite direction when the user releases the stick. If the user avoids touching the stick, the error ends when the stick detects the real zero position.
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Famous quotes containing the word problems:
“An interesting play cannot in the nature of things mean anything but a play in which problems of conduct and character of personal importance to the audience are raised and suggestively discussed.”
—George Bernard Shaw (1856–1950)
“The problems of society will also be the problems of the predominant language of that society. It is the carrier of its perceptions, its attitudes, and its goals, for through it, the speakers absorb entrenched attitudes. The guilt of English then must be recognized and appreciated before its continued use can be advocated.”
—Njabulo Ndebele (b. 1948)
“I’m no good at being noble, but it doesn’t take much to see that the problems of three little people don’t amount to a hill of beans in this crazy world. Someday you’ll understand that.”
—Julius J. Epstein, U.S. screenwriter, Philip Epstein, screenwriter, Howard Koch, screenwriter, and Michael Curtiz. Rick Blaine (Humphrey Bogart)