Graphics Reference
In-Depth Information
columnLoop: for (var r:int = 0; r
<
_numberOfImages; r
+= columns) {
for (var c:int = 0; c
<
columns; c++) {
if(r+c
<
_numberOfImages){
createImage(c, r);
}else{
break columnLoop;
}
}
}
}
public function setPosition(xPosition:Number = 0,
yPosition:Number = 0) {
x = xPosition;
y = yPosition;
}
s take a look into that
createImage
method that was
being called from the
for
loop in the constructor. Since this is an
image gallery, there are images in it, and they need to be created
(or loaded, actually). The two parameters required by this method
are the column and row where the image will end up. If you
remember from the
for
loop, we passed those in with the two
variables
c
and
r
. On the very first line of
createImage
,we
Now let
'
re going
to create a new Point with an
x
value equal to the
column
parameter
and a
y
value equal to the
row
parameter. That new Point is immedi-
ately added to the
_pointVector
for later use. Yes, you are correct.
That means you now have a Vector filled with Points with x,y values
like (0,1), (0,2), and (1,2). It may not make sense right away, but it
will make more when we look at the
placeImage
method. The next
way we
'
re going to use the
column
and
row
parameters together is to
grab an image name from
_imageArray
and append it to
_gallery
Path
. With those two values added together, we should have a valid
URL to an image for the gallery. What a coincidence! We need a
value like that for the
url
property of
_imageURLRequest
.Let
'
'
suse
this one, shall we?
Okay, now we
re going to use the
_imageLoader
variable to create a
new Loader for loading the image. Once we
'
'
ve instantiated that new
'
Loader, we
regoingtogiveitanameusingthe
_imageNamePrefix
combined (once again) with
row
and
column
.Thistimewe
re adding
the values of
row
and
column
to come up with a number, so we
end up with names for our images like
image_1
,
image_2
,and
image_3
. Let
'
Loaders next. First is
a
MouseEvent.CLICK
listener that will call the
imageClicked
method.
The second is an
Event.COMPLETE
listener that will call
placeImage
once the image has finished loading from its external location.
'
s add a few listeners to our images
'
