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Browse Prior Art Database

Screen Switch with Pointing Device in Virtual Screen System

IP.com Disclosure Number: IPCOM000113935D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 106K

Publishing Venue

IBM

Related People

Tachibana, T: AUTHOR [+3]

Abstract

A program is disclosed that lets displayed area move in a virtual screen system by using pointing devices. In a virtual screen system, the display subsystem doesn't display all of the screen image, but it displays a part of the screen image. This program is a display driver to move the displayed area when the user moves a pointing device or pushes buttons on the device.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Screen Switch with Pointing Device in Virtual Screen System

      A program is disclosed that lets displayed area move in a
virtual screen system by using pointing devices.  In a virtual screen
system, the display subsystem doesn't display all of the screen
image, but it displays a part of the screen image.  This program is a
display driver to move the displayed area when the user moves a
pointing device or pushes buttons on the device.

      The Figure shows the example of this virtual screen system of
an operating system for personal computers.  The display driver that
enables virtual screen function controls pointing device.
 o   In case that an user moves pointing device right/left up/down,
    the display driver moves displayed area right/ left/up/down.
 o   In case that an user pushes the right/left button on the
pointing
    device, the display driver moves displayed area to the
    right-most/left-most position.
 o     In case that an user pushes the shift-key and the right /left
    button on the pointing device, the display driver moves displayed
    area to the bottom/top position.

      Because these functions conflict with normal functions of
pointing devices, these functions are especially effective for the
operating systems based on character user interface.  The display
driver can enable these functions when an application program does
not use the pointing device.