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[fix] TimeVal: add dbg:guard against incorrect subtraction order (#4669)

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In principle, any negative subtraction result should be caused by a logical error.
This commit is contained in:
Frans de Jonge
2019-02-27 22:20:47 +01:00
committed by GitHub
parent 163853afdf
commit abba7ba873
3 changed files with 42 additions and 1 deletions
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2
frontend/device/gesturedetector.lua
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@@ -195,7 +195,7 @@ end
function GestureDetector:isSwipe(slot)
if not self.first_tevs[slot] or not self.last_tevs[slot] then return end
local tv_diff = self.first_tevs[slot].timev - self.last_tevs[slot].timev
local tv_diff = self.last_tevs[slot].timev - self.first_tevs[slot].timev
if (tv_diff.sec == 0) and (tv_diff.usec < self.SWIPE_INTERVAL) then
local x_diff = self.last_tevs[slot].x - self.first_tevs[slot].x
local y_diff = self.last_tevs[slot].y - self.first_tevs[slot].y