MiG InfoCom MiG Calendar AShape Developer Manual - Manual (Page 21)

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absolute time. It has duration (time), tick count, repetition
type/count and a
Function . It manages this information
including the ability to pause, stop, reverse and resume
animations.
Time lines are ever changing objects since there state is a
function of time + earlier state, which progresses outside our
control. To be able to read multiple properties from a
TimeLine its state is "freezable" and when frozen they will
not change and you can read multiple values that will be
correct in relation to each other. You will probably not have to
bother with this though, but it is a feature needed to write
precise
Animator s for instance.
Functions
This framework has the possibility to map frames to absolute
time non-linearly. This means that it is easy to do accelerated
fade ins and outs and to, for instance, create oscillating
animations. The default Function is
LinearFunction which
maps time and frame in a linear fashion. Also provided is a
class
ExpFunction which maps frames and time in
exponentially, making it simple to make accelerated or
retarding animations.
Swing Interoperability
The Basics
Swing is the standard GUI framework provided by Sun
Microsystems and is used to create user interfaces in Java.
The
AShape component interacts with Swing both ways. It
can be used within a Swing JComponent and any
JComponent can be contained in a AShape and still be used
the normal way.
JComponents in AShapes
There is a special
AShape thatcan contain a JComponent ,
namely JComponentAShape . It will set the bounds of the
“wrapped” JComponent to the same as it would get itself
and as such provides a transparent glue to have a
JComponent in an AShape . There are no special
requirements on the JComponent other than it still, as all
JComponent s, need a valid parent. Normally this should be
AShape Developer Manual Page 21 / 24