Browse Prior Art Database

# Negative Positioning of PRESENTATION Spaces

IP.com Disclosure Number: IPCOM000036241D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 61K

IBM

## Related People

Barker, BA: AUTHOR [+3]

## Abstract

In existing interchange data streams, the positioning capability of one coordinate space relative to another permits displacements only in the positive (x, y) direction. In order to view portions of data that are normally "clipped" in the positive (x, y) coordinate direction, the invention introduces the notion of negative (x, y) coordinate offsets.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 94% of the total text.

Page 1 of 2

Negative Positioning of PRESENTATION Spaces

In existing interchange data streams, the positioning capability of one coordinate space relative to another permits displacements only in the positive (x, y) direction. In order to view portions of data that are normally "clipped" in the positive (x, y) coordinate direction, the invention introduces the notion of negative (x, y) coordinate offsets.

Traditionally, the coordinate origin for a data presentation space consists of x and y displacement parameters that specify an offset relative to the origin of a "containing" coordinate space. The offset values, however, are limited to positive values which prevent the display of data that exceeds the size of the containing coordinate space in the positive (x, y) direction. For example, if a data object space is larger than the area designated to contain it, data is clipped so that its excess in the positive x and y direction is always lost. This invention permits the positioning of a data presentation space in both the positive and negative directions. In the figure the DATA COORDINATE SPACE is offset in the negative (x, y) direction from its containing PRESENTATION SPACE such that its lower right-hand corner is now visible. This is not possible if positioning displacements allow only positive offsets.

This invention results in an improvement in system flexibility and useability by permitting portions of a data space normally "clipped" in the positive (x, y) coordinate dire...