Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1997-10-06
1999-05-04
Feild, Joseph H.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
345123, 345418, 345157, G06T 100
Patent
active
059008725
ABSTRACT:
In a graphical user interface for computers, a scroll bar tracking and drawing procedure associates elements of the scroll bar with regions on the display. The region for the thumb can move relative to the other regions, and thereby track the movement of the cursor. Within each element's associated region, any desired pattern can be drawn. As a result, the thumb can be non-rectangular in shape. Furthermore, since the image within a region can be any arbitrary pattern, the image for the thumb can be either a complete image, to accommodate live scrolling, or a ghost image to accommodate ghost scrolling. As such, a single procedure can support both modes of operation, and permit the interface to be easily switched between the two.
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"MacIntosh Tool Box Essentials", Inside MacIntosh, Control Manager, Chapter 5, pp. 7-10, 30-37, 43-65 and 88-92.
Apple Computer Inc.
Feild Joseph H.
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