Display method and apparatus employing cursor panning

Details Display method and apparatus employing cursor panning Display method and apparatus employing cursor panning

G - Physics

09

G

375/11

G09G 1/00 (2006.01) G09G 5/08 (2006.01) G09G 5/14 (2006.01)

Patent

CA 1244159

- 1 - Abstract: A method and apparatus for providing a movable display relative to information stored in a pixel bit map memory involves addressing a portion of the pixel bit map memory to define a visible display wherein the portion addressed represents a viewport into the bit map memory, the pixel bit map memory storing a larger block of information than is included within said viewport. The positioning of a cursor is controlled and the position of the cursor relative to the addresses for the bit map memory that represent the viewport is detected in order to determine whether the cursor falls within the viewport. The addresses as applied to the bit map memory are then altered to move the viewport toward the cursor so as to include the cursor within the visible display when the current position of the cursor is detected as falling outside the viewport. The result is an improved manner of positioning a viewport relative to a large virtual screen.

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