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## com.google.gwt.animation.client
Class Animation

    java.lang.Object
      com.google.gwt.animation.client.Animation

    public abstract class Animation

extends java.lang.Object

An `Animation` is a continuous event that updates progressively over time at a non-fixed frame rate.

Constructor Summary
`Animation()`

Method Summary
`void` | `cancel()` Immediately cancel this animation.
`protected double` | `interpolate(double progress)` Interpolate the linear progress into a more natural easing function.
`protected void` | `onCancel()` Called immediately after the animation is canceled.
`protected void` | `onComplete()` Called immediately after the animation completes.
`protected void` | `onStart()` Called immediately before the animation starts.
`protected abstract void` | `onUpdate(double progress)` Called when the animation should be updated.
`void` | `run(int duration)` Immediately run this animation.
`void` | `run(int duration, double startTime)` Run this animation at the given startTime.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Animation

    public Animation()

Method Detail

### cancel

    public void cancel()

  Immediately cancel this animation. If the animation is running or is scheduled to run, `onCancel()` will be called.

### run

    public void run(int duration)

  Immediately run this animation. If the animation is already running, it will be canceled first.

  Parameters:
    `duration` - the duration of the animation in milliseconds

### run

    public void run(int duration,
                    double startTime)

  Run this animation at the given startTime. If the startTime has already passed, the animation will be synchronize as if it started at the specified start time. If the animation is already running, it will be canceled first.

  Parameters:
    `duration` - the duration of the animation in milliseconds
    `startTime` - the synchronized start time in milliseconds

### interpolate

    protected double interpolate(double progress)

  Interpolate the linear progress into a more natural easing function. Depending on the `Animation`, the return value of this method can be less than 0.0 or greater than 1.0.

  Parameters:
    `progress` - the linear progress, between 0.0 and 1.0
  Returns:
    the interpolated progress

### onCancel

    protected void onCancel()

  Called immediately after the animation is canceled. The default implementation of this method calls `onComplete()` only if the animation has actually started running.

### onComplete

    protected void onComplete()

  Called immediately after the animation completes.

### onStart

    protected void onStart()

  Called immediately before the animation starts.

### onUpdate

    protected abstract void onUpdate(double progress)

  Called when the animation should be updated. The value of progress is between 0.0 and 1.0 inclusively (unless you override the `interpolate(double)` method to provide a wider range of values). You can override `onStart()` and `onComplete()` to perform setup and tear down procedures.

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