Java Reference
In-Depth Information
order. Listing 8-8 shows the function
sortStops
. It should also be noted that the
LinearGradient
created
has
proportional
set to
true
, making it quick to show the gradient for example purposes. A later example
will use a
LinearGradient
with
proportional
set to
false
. This is often desirable, as it allows you to
specify exactly which part of the shape has the gradient applied to it.
Listing 8-8.
sortStops
public function sortStops(stops:Stop[]):Stop[]{
var result:Stop[] = Sequences.sort(stops, Comparator{
public override function compare(obj1:Object, obj2: Object):Integer{
var stop1 = (obj1 as Stop);
var stop2 = (obj2 as Stop);
if (stop1.offset > stop2.offset){
return 1;
} else if (stop1.offset < stop2.offset){
return -1;
} else {
return 0;
}
}
}) as Stop[];
return result
}
Listing 8-8 shows the function
sortStops
, which takes a sequence of
stops
and returns a sorted
Sequence
. To sort the
Sequence
, a
Comparator
is passed to the static function
Sequences.sort
. The
Comparator
simply compares the
offset
of the two
Stops
and returns an
Integer
value indicating if the
first
Stop
is greater than, equal to, or less than the second
Stop
. If you are familiar with the Java
Collections API you will recognize this pattern, as the class
Sequences
is an analog of the class
Collections
.
Simple Radial
Animating a
RadialGradient
is similar to animating a
LinearGradient
. The differences are minor, but
worth exploring for completeness and to bring home how
bind
, combined with a function, is used to
create these effects.
Figure 8-4 shows two phases of an animation of a
RadialGradient
, with the
Stop
at 0.0 being
changed from black to yellow.
