Don't forget this patent issued today to Aaple. Are 5 today enough! Patent number 8347238
Device, method, and graphical user interface for managing user interface content and user interface elements by dynamic snapping of user interface elements to alignment guides
Alignment guides configured for adaptive snap-to behavior are disclosed. In one embodiment, during a user interface element resize or move gesture, match-priority values for potential alignment guides are determined based at least on gravity values associated with said alignment guides. After a displayed object is snapped to a first alignment guide having the highest match-priority value, and the user interface element is moved away from the first alignment guide during the resize or move gesture, the gravity value associated with the first alignment guide is adjusted.