Stop a controlling object to move in Corona sdk -

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i have 2 controls in space shooter-like game, left , right. ship move left , right , when ship moves left of x=40 (far left), revert x=40 , disable "move left" function temporarily, problem whenever move far left or far right of screen, middle of screen, ship moves further x=40(about x=35) moves , continues until let go of button. how can make when move ship far left, stops , lets me move right?

here code:

function left:touch() if(car01.x>40 , car01.x<280)     motionx=-speed; return false end end left:addeventlistener("touch",left)  function left:touch2()     motionx=0; end  local function movecar(event) if(car01.x>40 , car01.x<280)     car01.x=car01.x+motionx return false elseif(car01.x==40)     car01.angularvelocity=0     left:addeventlistener("touch2",left)     car01.x=car01.x+motionx elseif(car01.x<40)     car01.x=40 end end runtime:addeventlistener("enterframe",movecar)  local function stop(event) if (event.phase=="ended")     motionx=0;     return true     end end runtime:addeventlistener("touch",stop)

is is looking for..?

create background(bg), left , right controls(left , right resp.). then:

local function moveleft()   if(car01.x>40)then     car01.x = car01.x - 40   end end left:addeventlistener("tap",moveleft)  local function moveright()   if(car01.x<280)then     car01.x = car01.x + 40   end end right:addeventlistener("tap",moveright)

keeo coding....... :)


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