Precision automatic scrolling for an image display system

摘要

A system and method of precision automatic scrolling for use in an image display system. Upon selecting a displayed entity having an off-screen end or other point which is desired to be brought into view, the entity's definitional vector coordinate characteristics are compared to the coordinates of the selection point on the display screen. The results of the comparison provide the XY coordinates of the entity which are furthest from the point of selection. The resulting XY coordinates are then made the new center point of the area in view. The current level of magnification is maintained during this operation. The present system and method thus eliminates the need for manual panning/scrolling or demagnification to bring the desired endpoint into view. The present system and method can also be applied to locate and display a nearest endpoint or a closest point of intersection between two entities.