Event.COMPLETE dispatched by MovieClip

alexzheng · March 2012

the callback function of Event.COMPLETE is not always called.
for example,the max value of count is 62, 64 or 65

function Player:onAddedToStage()
for i = 1, 100 do
local mc = MovieClip.new{
{1, 10, self}
}

mc:addEventListener(Event.COMPLETE, self.complete, self)
end
end

local count = 0
function Player:complete()
count = count + 1

print(count)
end

ar2rsawseen · March 2012

My guess would be the ending time for them is pretty similar if not the same
and since count = count + 1 is not an atomic function, many of the complete callbacks use same value of count and increase it, and not increased value by previous complete.

Here's an example:

First complete ended, it takes count (which is 0), second complete ended, it also takes count which is 0, first complete increases count by one and saves it into count variable, which is now 1.
Second complete increases it's own count value (which is 0) and saves it to same variable first complete saved, overriding the value (it saves 1 again).

So two complete's ended, but count was increased only by 1.

You need to think more multi thread-alike, event driven to measure it.

For example:

function Player:onAddedToStage()
    for i = 1, 100 do
    local mc = MovieClip.new{
       {1, 10, self}
    }
    mc.i = i
    mc:addEventListener(Event.COMPLETE, function()
       print(self.i)
   end, mc)
 end
end

And see if all values from 1to 100 are printed (may not be in incremental order, though)

atilim · March 2012

Hi,

In fact, in @alexzheng example, while executing the loop, some of the movie clips are garbage collected so that Event.COMPLETE event is not dispatched for them.

@ar2rsawseen you can think that everything works in a single-threaded environment. (and in fact it is)

alexzheng · March 2012

In fact,in my real project the code is as following,and there are many player instances created randomly.
as @atilim said some of the movie clips are garbage collected, I will try to reference the mc in the player.
self.mc = mc -----add this line
is that OK?

function Player:onAddedToStage()

local mc = MovieClip.new{
{1, 10, self}
}

self.mc = mc -----add this line
mc:addEventListener(Event.COMPLETE, self.complete, self)

end

function Player:complete()
--do something
self.mc = nil
end

alexzheng · March 2012

Timer.pauseAll() and Timer.resumeAll() are very useful when the pause menu popup. But it's not so simple to pause all the movieclip.
Will MovieClip.pauseAll() and MovieClip.resumeAll() be available in next version?
And currently, does mc:stop reset the current frame or just pause at current frame and mc:play resume from current frame?

atilim · March 2012

self.mc = mc -----add this line
is that OK?

totally ok.

Also if I modify your code as:

movieclips = {} -- added this line
function Player:onAddedToStage()
    for i = 1, 100 do
        local mc = MovieClip.new{
            {1, 10, self}
        }
        movieclips[#movieclips + 1] = mc  -- and added this line
 
        mc:addEventListener(Event.COMPLETE, self.complete, self)
    end
end
 
local count = 0
function Player:complete()
    count = count + 1
    print(count)
end

You should see 100 as the final count.

atilim · March 2012

Timer.pauseAll() and Timer.resumeAll() are very useful when the pause menu popup. But it's not so simple to pause all the movieclip.
Will MovieClip.pauseAll() and MovieClip.resumeAll() be available in next version?
And currently, does mc:stop reset the current frame or just pause at current frame and mc:play resume from current frame?

I will add MovieClip.pauseAll() and MovieClip.resumeAll() but most probably not to the next version. 2012.2.2 has already many items to be implemented. But I've added this two functions to the roadmap of 2012.2.3.

mc:stop pause at current frame and mc:play resume from the previously paused frame.

alexzheng · March 2012

hi @atilim
I also think about adding the mc to a table,and stop all the mc in the table on pause,but I can not determine which mc to remove from the table in the complete function.

atilim · March 2012

Maybe you can use event:getTarget() function to obtain the mc that dispatches the event.

alexzheng · March 2012

what I mean is how to dereference the mc from table movieclips.

finally,I just search all the children to get the mc and stop it on pause.

atilim · March 2012

You should store the movie clips like:

movieclips[mc] = true

and then when a movie clip finishes, you can remove it by using:

movieclips[mc] = nil

and you can iterate over movieclips table by using:

for mc in pairs(movieclips) do
end

alexzheng · March 2012

keep mc as a key is a good idea,thanks @atilim

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