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Hardware Control of Display Screen Windowing Disclosure Number: IPCOM000059906D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08

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Platt, M Woods, PD [+details]


In a graphics display, the screen is divided into a number of windows to display sections of multiple applications. Each window has a smaller viewport, and may be moved around under the viewport by cursor control. Hardware controls the position of the window on the screen so that the cursor lies within the viewport. This is achieved by dividing the display screen into four logical areas around the viewport and detecting when the cursor occurs within one of these areas. If it does, the start of the window is adjusted. Also, the final position of the cursor is controlled by an algorithm to position the cursor at the most logical position within the viewport. The use of multiple windows on a display screen to display sections of multiple applications is becoming increasingly prevalent.