Browse Prior Art Database

Keyboard Controlled Grid Cursor

IP.com Disclosure Number: IPCOM000083306D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Freiman, CV: AUTHOR [+2]

Abstract

This provides a method for selecting among displayed objects without using an auxiliary locating device such as a light pen, joy stick or any means, other than the keyboard that normally is employed with a display console.

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Keyboard Controlled Grid Cursor

This provides a method for selecting among displayed objects without using an auxiliary locating device such as a light pen, joy stick or any means, other than the keyboard that normally is employed with a display console.

Let it be assumed that a display contains objects such as X and Y. These, for example, could be items such as characters in a body of displayed text which is to be edited. To identify the location of any point of interest in a displayed picture, the operator causes a computer-generated coordinate grid to be displayed as a background diagram. The coordinates of the selected point are those associated with the nearest grid intersection, and the operator enters these coordinates into the system via the keyboard. No light pen or movable cursor is required.

With a stationary grid cursor, occasionally a situation may be encountered in which the locations of two items are identified by the same grid intersection. In the example shown, items X and Y both are located near the intersection of column D and row 7. To avoid the ambiguity which otherwise would arise from the fact that D7 identifies both X and Y, the operator is able to effect incremental shifts of the coordinate grid horizontally and/or vertically so that X, for example, is now unambiguously identified by the locator D'7'. The system is designed so that any shifts in the position of the grid origin are automatically taken into account.

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