Mechanism to control and use window events among applications in concurrent computing

• US 5,844,553 A
• Filed: 03/29/1996
• Issued: 12/01/1998
• Est. Priority Date: 08/30/1993
• Status: Expired due to Term

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Company (HP Inc.)
• Inventors: Young, Charles, Garfinkel, Daniel, Karp, Alan H, Hao, Ming C., Fincher, Thomas G.
• Primary Examiner(s): HUYNH, BA
• Application Number:
  US08/625,615
• Time in Patent Office: 977 Days
• Field of Search: 395/329, 395/330, 395/331, 395/332, 395/825, 395/824, 395/200.31, 395/200.34, 395/200.44, 395/200.57, 395/200.6, 395/200.62, 395/200.68, 345/329, 345/330, 345/331, 345/339, 345/340
• US Class Current: 715/733
• CPC Class Codes: G06F 9/451 Execution arrangements for user interfaces

Abstract

A new application sharing technology that enables sharing of many single-user non-modified applications between two or more workstations. It provides concurrent sharing of existing multiple applications with no change in a distributed environment. It permits real-time sharing of distributed applications based on a fundamental window hierarchical mapping and user interactions. Control is centralized but the data and program are replicated. It is event driven with agent assistance. The new event capturing capability is automatically triggered by user interactions on entering/leaving the shared window. The event capturing capability starts when the user moves the pointer into the shared windows. The event capturing ends when the user moves the pointer out of the shared windows. The new multicasting scope is defined in a shared window hierarchy data array. This global data array is dynamically created at run time on an as-needed basis. Because this mechanism only processes user input events such as mouse, keyboard or cursor movement (commands), no output graphic data transmission across the network is required. Therefore, this approach is extremely light-weight and provides secure transmission without requiring intensive encryption. Because it is not using pseudo server interception, this approach can support DHA 3-D rendering. Also, the agent can dynamically mediate resources and normalize environment differences. This permits real-time sharing of 3-D, graphic and DHA (direct hardware access) applications. DHA permits the application to bypass the windowing server to render graphics on display. Moreover, because it is extremely light-weight, high network bandwidth is not required.

Claims

1. An inter-access event protocol (IEP) graphical user interface for a windows computing environment, comprising:

means for capturing private input events; and

means for multicasting the captured input events based upon a window hierarchical data array.

2. A graphical user interface as recited in claim 1,

wherein the IEP handles motion, button and keyboard event capturing.

3. A graphical user interface as recited in claim 1,

wherein the IEP provides generic window hierarchy tree creation and mapping.

4. A graphical user interface as recited in claim 1,

wherein the IEP handles the processing of shared and unshared applications.

5. A system for capturing window events and multicasting the window events to a plurality of application programs, said system comprising:

at least one remote computer having at least a first running application program residing thereon; and

a host computer, operatively connected to said remote computer, having a display screen, an inter-access event process procedure, and at least a second running application program residing thereon, said display screen captures incoming window events for said second running application program and forwards the window events to said inter-access event process procedure, and said inter-access event process procedure multicasts the window events to said first and second running application programs.

6. A system as recited in claim 5, wherein the window events captured are motion, button and keyboard events.

7. A system as recited in claim 5, wherein a subset of the captured window events are grouped.

8. A system as recited in claim 5, wherein a subset of the captured window events are ignored.

9. A system as recited in claim 5, wherein at least one of the captured window events is mapped to another event and multicast as the other event to at least one of the running applications.

10. A method for multicasting window events to application windows of running window-based application programs, said method comprising:

capturing an incoming window event when a pointer is in a window;

selecting a plurality of the application windows which are to receive the window event; and

multicasting the window event to the plurality of the application windows selected to receive the window event based on a window hierarchical data array.

11. A method as recited in claim 10, wherein the step of multicasting includes multicasting the window event to first and second windows wherein:

the first window corresponds to a first window-based application program running on a first computer; and

the second window corresponds to a second window-based application program running on a second computer, different from the first computer.

12. A method as recited in claim 10, wherein the step of multicasting the window event includes multicasting the window event to first and second child windows wherein:

the first child window corresponds to a first window-based application program; and

the second child window corresponds to a second window-based application program; and

wherein the first and second window-based application programs are running on the same computer.

13. A method as recited in claim 10, wherein the step of capturing includes receiving the incoming window event based upon the pointer entering the window having the incoming window event.

14. A method as recited in claim 10, wherein the step of selecting includes selecting the plurality of the application windows which are to receive the window event based upon a mapping window hierarchy.

15. A method as recited in claim 10, wherein the mapping window hierarchy includes child windows.