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diff --git a/actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java b/actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java
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+++ b/actionbarsherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/FloatKeyframeSet.java
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+/*
+ * 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();
+ }
+
+}
+