resize
resize behavior for SCView
1 2 3
4 5 6
7 8 9
1 - fixed to left, fixed to top
2 - horizontally elastic, fixed to top
3 - fixed to right, fixed to top
4 - fixed to left, vertically elastic
5 - horizontally elastic, vertically elastic
6 - fixed to right, vertically elastic
7 - fixed to left, fixed to bottom
8 - horizontally elastic, fixed to bottom
9 - fixed to right, fixed to bottom