THE MEMORY GAME - Flash Advertising - page 252

two cards in the _cardsToCompare Array, covers the face of the card
with the back of the card (another opportunity for a transition here),
and makes the card interactive again by setting its buttonMode to true.
After that, we just empty the _cardsToCompare Array with splice(0)
and return _allowClick totrue.Finally,wehavethe correctMatch
method, which we fired earlier when there was what? Yes, a correct
match. The first thing this method does is increment _matches
Complete . After that, it clears out the _cardsToCompare Array and
checks to see if the number of cards matched is equal to the original
number of cards in the deck. If it is equal, a MemoryGameEvent.GAME_
COMPLETE event is dispatched, and that

' s all there is to it.

Sample Use of MemoryGame
Within the com.flashadbook.base package, you can find this sample
code in MemoryGameSample.as, and here

' s the quick breakdown of

what s happening within that class. First, there are several variables

that get set up. _memoryGame is an instance of MemoryGame, and
_gameCards is an array of the Linkage names for some images that are
in the library of the .fla. These are the card faces. Next up are some
variables that hold the coordinates for the rows and columns that
we

'

ll use those coordinates to fill the
_coordArr Array with x and y values. Next in line is the constructor
method, which, at this point, does nothing more than fire off the new-
Game method and passes in _gameCards for the required cardsToUse
parameter and _coordArr for the optional locationArr parameter.
The result of this sample is a game like the one in Figure 13.2.

' ll use to place our cards. We '

TIP
Note that I populated the _coordArr with Objects containing x and y
values, but you could just as easily populate it with Points.

s take a quick look at the newGame method. This one
is another very straightforward method that instantiates a new
MemoryGame with the array of cards ( cardsToUse ), and if you have
one to use, the Linkage name of the image in the library that will be
thebackofthecard.Afterthegameisinstantiated,it

Now let '

s added to the
stage, and the cards are dealt with the MemoryGame.deal method. In
this case, we

'

re using the custom layout and passing in that array of
coordinates we created earlier. The last thing we do in this method is
to add listeners to the game for each of the MemoryGameEvent
events. The last three methods in this class are simply the handlers
for each of those listeners.

'

package com.flashadbook.base {
import flash.display.MovieClip;
import flash.events.MouseEvent;