1. VA2440 – Class 04 Graphical User Interface

2. Pointing device

3. Mouse

4. Mouse states Mouse idle move press release stop Mouse down Mouse move press move release stop Mouse drag

6. Mouse down

7. Mouse move

8. Mouse drag

9. Press

10. Release

11. Move

13. GEM implementation We are going to use gemmouse To try out some of the experiments.

14. GEM mouse Obtain mouse x and y positions. Normalize mouse x and y positions. Relation with the co-ordinates system.

15. Co-ordinates

16. Distance

17. Collision