CODEWITHSUNDEEP
luacoronasdk
Atrag
Atrag

Reputation: 743

Changing Text with Timer

I want to change the string of a text object after a number of seconds. This is the code:

  if scoretoShow then
aAscoretext = display.newText( scoretoShow.."/8", 200, 200, "Comic Sans MS", 30)
else
aAscoretext = display.newText( "0/8", 200, 200, "Comic Sans MS", 30)
end
aAscoretext:setFillColor( 0.4 )
aAscoretext.x = Letterbackground.x
aAscoretext.y = Letterbackground.y + Letterbackground.width/3


   if type(scoreChange) == "number" then
for f = 0, scoreChange, 1 do
    print("f")
        print(f)

timer.performWithDelay( timeforChange-(f*(timeforChange/scoreChange)), 
function()
 aAscoretext.text = "HELLO!"
Letterbackground:setFillColor( gradients[newScore-f+1] )
audio.play(Wobble)
end)

However, if I put the aAscoretext.text = "HELLO!" just under print(f) then it works fine.

Thank you.

Upvotes: 0

Views: 206

Answers (1)

GoojajiGreg
GoojajiGreg

Reputation: 1183

All those calls to timer.performWithDay() in the for loop may not be executing the way you expect. I find it easier to make the listener that changes the text property in the TextObject just call itself again after a delay if another step in the change is needed.

This will illustrate what I mean. Let's say you have a TextObject score that displays the score and two variables currentScore and newScore where newScore > currentScore and both are integer values. If you want the score display to "count up" from currentScore to newScore, you can do it this way:

local currentScore = 0 

--
-- Call this function when the score needs to change
--
local function newScoreToDisplay( newScore )    

    local countingInterval = 100 -- we want to add 1 to the displayed score every 100 ms

    local function adjustScoreDisplay( event )

       if currentScore < newScore then
           currentScore = currentScore + 1
           score.text = tostring( currentScore ) -- score is a Corona TextObject
           timer.performWithDelay( countingInterval, adjustScoreDisplay )
       end
    end

    -- First call to adjustScore() if score really needs adjusting
    if currentScore < newScore then
        timer.performWithDelay( 0, adjustScore ) --make the first change immediately
    end
end

Upvotes: 0

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