User interface system for computers

Details User interface system for computers User interface system for computers

G - Physics

06

F

G06F 3/02 (2006.01) G06F 9/44 (2006.01)

Patent

CA 2095779

Abstract of the Disclosure USER INTERFACE SYSTEM FOR COMPUTERS In accordance with the present invention, user inter- face functions in a computer application program are handled entirely separately from processing functions performed by an application program and the user interface is called from the application processing part of a program. Whenever the process- ing part of a program requires a user command, an open user interface system (OUIS) is called and begins interacting with the user. Eventually, the user selects some operation that requires the attention of the processing part of the program. The OUIS then stops interacting with the user and returns control to the processing part. When the requested processing is completed, the processing part calls the OUIS again (requests the next opera- tion) and the OUIS resumes interaction with the user. The elements defining the interface are arranged in a tree, and user actions typically require updating the interaction status of elements in the user interface. Updating entire subtrees to update the user interface occurs in two stages: preupdating and postupdating. The user interface tree is not considered updated until all elements have been postupdated. Preupdating flows down the tree, with no element being preupdated until a preupdate has been made of its parent element, if any. Postupdating flows up the tree, with no element being postupdated until all subelements in its entire subtree has been postupdated. User interface descriptions are stored in special files, independent of the corresponding program. The interface can then be modified without affecting the logical functioning of the application program, and without having to modify the program. M:\7066\07388\

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