diff options
Diffstat (limited to 'actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java')
-rw-r--r-- | actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java b/actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java new file mode 100644 index 000000000..6d9dafa7a --- /dev/null +++ b/actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java @@ -0,0 +1,136 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.actionbarsherlock.internal.nineoldandroids.animation; + +import java.util.ArrayList; +import android.view.animation.Interpolator; + +import com.actionbarsherlock.internal.nineoldandroids.animation.Keyframe.FloatKeyframe; + +/** + * This class holds a collection of FloatKeyframe objects and is called by ValueAnimator to calculate + * values between those keyframes for a given animation. The class internal to the animation + * package because it is an implementation detail of how Keyframes are stored and used. + * + * <p>This type-specific subclass of KeyframeSet, along with the other type-specific subclass for + * int, exists to speed up the getValue() method when there is no custom + * TypeEvaluator set for the animation, so that values can be calculated without autoboxing to the + * Object equivalents of these primitive types.</p> + */ +@SuppressWarnings("unchecked") +class FloatKeyframeSet extends KeyframeSet { + private float firstValue; + private float lastValue; + private float deltaValue; + private boolean firstTime = true; + + public FloatKeyframeSet(FloatKeyframe... keyframes) { + super(keyframes); + } + + @Override + public Object getValue(float fraction) { + return getFloatValue(fraction); + } + + @Override + public FloatKeyframeSet clone() { + ArrayList<Keyframe> keyframes = mKeyframes; + int numKeyframes = mKeyframes.size(); + FloatKeyframe[] newKeyframes = new FloatKeyframe[numKeyframes]; + for (int i = 0; i < numKeyframes; ++i) { + newKeyframes[i] = (FloatKeyframe) keyframes.get(i).clone(); + } + FloatKeyframeSet newSet = new FloatKeyframeSet(newKeyframes); + return newSet; + } + + public float getFloatValue(float fraction) { + if (mNumKeyframes == 2) { + if (firstTime) { + firstTime = false; + firstValue = ((FloatKeyframe) mKeyframes.get(0)).getFloatValue(); + lastValue = ((FloatKeyframe) mKeyframes.get(1)).getFloatValue(); + deltaValue = lastValue - firstValue; + } + if (mInterpolator != null) { + fraction = mInterpolator.getInterpolation(fraction); + } + if (mEvaluator == null) { + return firstValue + fraction * deltaValue; + } else { + return ((Number)mEvaluator.evaluate(fraction, firstValue, lastValue)).floatValue(); + } + } + if (fraction <= 0f) { + final FloatKeyframe prevKeyframe = (FloatKeyframe) mKeyframes.get(0); + final FloatKeyframe nextKeyframe = (FloatKeyframe) mKeyframes.get(1); + float prevValue = prevKeyframe.getFloatValue(); + float nextValue = nextKeyframe.getFloatValue(); + float prevFraction = prevKeyframe.getFraction(); + float nextFraction = nextKeyframe.getFraction(); + final /*Time*/Interpolator interpolator = nextKeyframe.getInterpolator(); + if (interpolator != null) { + fraction = interpolator.getInterpolation(fraction); + } + float intervalFraction = (fraction - prevFraction) / (nextFraction - prevFraction); + return mEvaluator == null ? + prevValue + intervalFraction * (nextValue - prevValue) : + ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)). + floatValue(); + } else if (fraction >= 1f) { + final FloatKeyframe prevKeyframe = (FloatKeyframe) mKeyframes.get(mNumKeyframes - 2); + final FloatKeyframe nextKeyframe = (FloatKeyframe) mKeyframes.get(mNumKeyframes - 1); + float prevValue = prevKeyframe.getFloatValue(); + float nextValue = nextKeyframe.getFloatValue(); + float prevFraction = prevKeyframe.getFraction(); + float nextFraction = nextKeyframe.getFraction(); + final /*Time*/Interpolator interpolator = nextKeyframe.getInterpolator(); + if (interpolator != null) { + fraction = interpolator.getInterpolation(fraction); + } + float intervalFraction = (fraction - prevFraction) / (nextFraction - prevFraction); + return mEvaluator == null ? + prevValue + intervalFraction * (nextValue - prevValue) : + ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)). + floatValue(); + } + FloatKeyframe prevKeyframe = (FloatKeyframe) mKeyframes.get(0); + for (int i = 1; i < mNumKeyframes; ++i) { + FloatKeyframe nextKeyframe = (FloatKeyframe) mKeyframes.get(i); + if (fraction < nextKeyframe.getFraction()) { + final /*Time*/Interpolator interpolator = nextKeyframe.getInterpolator(); + if (interpolator != null) { + fraction = interpolator.getInterpolation(fraction); + } + float intervalFraction = (fraction - prevKeyframe.getFraction()) / + (nextKeyframe.getFraction() - prevKeyframe.getFraction()); + float prevValue = prevKeyframe.getFloatValue(); + float nextValue = nextKeyframe.getFloatValue(); + return mEvaluator == null ? + prevValue + intervalFraction * (nextValue - prevValue) : + ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)). + floatValue(); + } + prevKeyframe = nextKeyframe; + } + // shouldn't get here + return ((Number)mKeyframes.get(mNumKeyframes - 1).getValue()).floatValue(); + } + +} + |