3e4fd5 Touch Screen Controls (#1437)

3 files Authored by Jeremy Bullock 8 years ago , Committed by shun-iwasawa 8 years ago ,
    Touch Screen Controls (#1437)
    
    * Touch Screen Controls

    One finger for pan.

    Two fingers for zoom or rotate.

    Double tap for fits to the viewer.

    Three finger drag for undo and redo.