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Cancel A Lua Function

 
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Corroder
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Joined: 10 Apr 2015
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PostPosted: Fri Jun 07, 2019 11:39 pm    Post subject: Cancel A Lua Function Reply with quote
This performs with delay function made by mgr.inz.Player. I use the function on my project. The problem is how to terminate or cancel the function?

Code:
function performWithDelay(delay,onFinish,onTick,onTickInterval)
 if type(delay)~='number' then error('delay is not a number') end
 if type(onFinish)~='function' then error('onFinish is not a function') end
 if onTick and type(onTick)~='function' then error('onTick is not a function') end
 if onTickInterval and type(onTickInterval)~='number' then
 error('onTickInterval is not a number') end
 onTickInterval = onTickInterval or 1000
 local f = function (t)
 local getTickCount = getTickCount
 local startTick = getTickCount()
 local endTick = startTick + delay
 local nextOnTick = startTick + onTickInterval
 local ticks
 if onTick then while true do ticks=getTickCount()
 if nextOnTick<ticks then nextOnTick=ticks+onTickInterval
 synchronize(onTick,endTick-ticks) end
 if endTick<ticks then break end sleep(1) end else
 while true do ticks=getTickCount() if endTick<ticks then break end
 sleep(1) end end
 if onFinish then synchronize(onFinish) end end
 local t = createNativeThreadSuspended(f) t.name = 'performWithDelay thread' t.resume()
end

performWithDelay(10000,whenFinished,showTimeLeft,10)  --- do countdown 10 seconds

-- whenFinished is a function = do something when countdown timer over
-- showTimeLeft = show the progress on a label


In Corona, I can use, example:

Code:
local spawnTimer = timer.performWithDelay(1000, spawnBadGuy, 0)
timer.cancel( spawnTimer )  -- to cancel the performWithDelay timer.


How in CE Lua script?
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Dark Byte
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PostPosted: Sat Jun 08, 2019 3:58 am    Post subject: Reply with quote
it's a LOT easier to use a timer, just get rid of that ontickinterval

anyhow, in the f function add a if t.Terminated check, and if so, exit

then make performWithDelay return t

and when you wish to stop it do t.destroy()
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Corroder
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PostPosted: Sat Jun 08, 2019 5:13 am    Post subject: Reply with quote
[SOLVED] : Yes, DB. I did your suggestion by change 'perform with delay' function to:

Code:
function SecondsToClock(seconds)
 local seconds = tonumber(seconds)
 hours = string.format("%02.f", math.floor(seconds/3600));
 mins = string.format("%02.f", math.floor(seconds/60 - (hours*60)));
 secs = string.format("%02.f", math.floor(seconds - hours*3600 - mins *60));
 return hours..":"..mins..":"..secs
end


and implemented that to my project, more easier to control by a timer event handler, example:

Code:
function startSpeedHack()
 labelTimer.Font.Size = 26
 labelTimer.Font.Color = pnUp.Color --'65407'
 labelTimer.Left = 61
 pnPBar.Visible = true
 sh = edtSpeed.Text
 st = edtSpTimer.Text
 sh = tonumber(sh)
 sec = tonumber(st) --* 10
 counterTime = sec
 pnPBar.Width = 208
 step = 208 / sec
 decreaseTime = 1
 labelTimer.Caption = SecondsToClock(counterTime)
 tmr.Enabled = true
 pnSetSpeed.Enabled = false
 pnStopSpeed.Enabled = true
end

function bar()
 speedhack_setSpeed(sh)
 sec = sec - 1
 pnPBar.width = pnPBar.width - step
 counterTime = counterTime - decreaseTime
 labelTimer.Caption = SecondsToClock(counterTime)
 if counterTime <= 0 then
  speedhack_setSpeed(1)
  tmr.enabled = false
  edtSpeed.Text = ''
  edtSpTimer.Text = ''
  labelTimer.Font.Size = 20
  labelTimer.Font.Color = '858083'
  labelTimer.Caption = "Time's Up!"
  pnPBar.Visible = false
  pnSetSpeed.Enabled = false
  pnStopSpeed.Enabled = false
 end
end

tmr = createTimer()
tmr.interval = 1000
tmr.enabled = false
tmr.OnTimer = bar

function stopTimer()
 tmr.Enabled = false
 edtSpeed.Text = ''
 edtSpTimer.Text = ''
 labelTimer.Caption = "00:00:00"
 pnPBar.Visible = false
 pnSetSpeed.Enabled = false
 pnStopSpeed.Enabled = false
end

f.show()
pnSetSpeed.onClick = startSpeedHack


Quote:
add a if t.Terminated check, and if so, exit


Also, I try to add 'a check condition' to the 'performWithDelay' function.

Thanks...
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