Multiple user/agent window control

• US 5,796,396 A
• Filed: 06/05/1997
• Issued: 08/18/1998
• Est. Priority Date: 03/31/1995
• Status: Expired due to Term

• Current Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Information Technology Center America, Inc. (Mitsubishi Electric Corporation)
• Inventors: Rich, Charles
• Primary Examiner(s): Kim, Matthew M.
• Assistant Examiner(s): SAX, STEVEN PAUL
• Application Number:
  US08/869,468
• Time in Patent Office: 439 Days
• Field of Search: 395/390, 395/334, 395/326, 395/329, 395/330, 395/331, 395/333, 345/340, 345/339, 345/320, 345/341, 345/330, 345/331, 345/332, 345/333, 345/346
• US Class Current: 715/741
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/0481 based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
• CPC Class Codes: G06F 3/04892 Arrangements for controlling cursor position based on codes indicative of cursor displacements from one discrete location to another, e.g. using cursor control keys associated to different directions or using the tab key arrangements for controlling cursor position based on coordinate signals G06F3/038
• CPC Class Codes: G06F 9/52 Program synchronisation; Mutual exclusion, e.g. by means of semaphores

Abstract

A system is provided to automatically control input permission when multi users and/or software agents interact with a single, shared application in a window-based computing environment, and to indicate to all users which user or software agent currently is providing input or seeking input permission. The system operates by providing each user and agent with a specialized cursor icon that is used for displaying input-permission status and for requesting and relinquishing input-permission. Cursors have three modes with distinct appearances indicating whether the corresponding user or agent has, does not have, or desires input permission. Cursors are replicated on all displays, so that all users can at all times easily see who has or desires input permission. Users interact with the input-permission system by moving and clicking their mouse. Software agents achieve the same effects by sending control requests directly to a software interface provided as part of the invention. In one embodiment, each user and agent also has an assigned Home Window, which is used for identification and to compose and display text messages.

Claims

1. A system for the control of a single program running at one location, said program shared by users of a network of associated terminals, each terminal having a display screen, a dedicated window at said display screen and window input event generating means, the results of running said shared program being displayed at each terminal through the use of the window thereat, comprising:

means coupled to said network at said one location for both storing and executing said single program and for storing data associated therewith such that said single program and associated data storage are co-located and such that said storing and executing means provides a single running program shared by said users;

means including a software agent and coupled to said network for automatically permitting a window input event from one user to control said shared program such that said program is under the control of said one user; and

, means for indicating to all of said users which of said users has been granted permission to control said shared program.

2. The system of claim 1, wherein said indicating means include means for indicating to all users when any of said users is seeking input permission.

3. The system of claim 2, wherein said automatic input-permission establishing means includes means for ascertaining when any of said users is seeking input permission.

4. The system of claim 1, wherein said indicating means includes means for generating an on-screen cursor icon unique to each user at each of said display screens such that each of said icons is replicated on all of said display screens.

5. The system of claim 4, wherein said indicating means includes means for altering the appearance of said on-screen cursor icon, depending on whether said user has input permission.

6. The system of claim 4, wherein said indicating means includes means for altering the appearance of said on-screen cursor icon, depending on whether said user desires input permission.

7. The system of claim 1, wherein said indicating means includes indicia at each screen for indicating on-screen which of said users has been granted input permission.

8. The system of claim 1, wherein said display screen includes on-screen control icons, and wherein said means for automatically establishing input permission includes means available to each of said users and including a mouse for moving a cursor associated with a user over said display screen and for actuating an on-screen control icon by overlaying said control icon with said cursor and clicking said mouse.

9. The system of claim 4, and further including means for generating home windows on each of said display screens, each associated with a different user, at which the on-screen cursor icon associated with said user initially resides.

10. The system of claim 9, wherein said means for automatically establishing input permission includes means for moving an icon from said home window to said window.

11. The system of claim 1, and further including a software agent and means for coupling said software agent to said means for automatically establishing input permission.

12. The system of claim 1, wherein said indicating means includes means for generating an on-screen cursor icon unique to said software agent.