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bug fix for swipe gesture detection (nil x or y)

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a complete_last_ev var is used to make sure the first argument
to isSwipe() method has no nil x or y entry.
This commit is contained in:
Qingping Hou
2012-12-30 01:01:44 -05:00
parent f19b6e7667
commit c5fc851bb7
1 changed files with 10 additions and 1 deletions
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11
frontend/ui/gesturedetector.lua
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@@ -269,7 +269,16 @@ function GestureDetector:panState(ev)
DEBUG("in pan state...")
if ev.id == -1 then
-- end of pan, signal swipe gesture if necessary
swipe_direct = self:isSwipe(ev)
-- we need to construct a complete_last_ev because
-- the x or y of ev might be nil.
local complete_last_ev = self:deepCopyEv(ev)
if not complete_last_ev.x then
complete_last_ev.x = self.cur_x
end
if not complete_last_ev.y then
complete_last_ev.y = self.cur_y
end
swipe_direct = self:isSwipe(complete_last_ev)
if swipe_direct then
local start_pos = Geom:new{
x = self.first_ev.x,