Feature request: lock scrolling direction about apv HOT 4 CLOSED

Here's another idea.  A lot of users are going to scroll only downward.  In 
that usage scenario, it would make sense to have a scroll-vertically-lock mode, 
where all scroll swipes are interpreted as vertically, unless you first swipe 
horizontally for at least 1/8 of the display (say) at which point horizontal 
scrolling becomes active until you lift off your finger.

Implemented in 0.3.0pre11

There isn't function like this at another PDF Readers for Android.
Excellent decision!

i wna know wher in code you have used vertical scrolling. i wish to use it in 
my application which is based on mupdf.