diff options
Diffstat (limited to 'libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java')
-rw-r--r-- | libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java b/libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java new file mode 100644 index 000000000..e9215e7f8 --- /dev/null +++ b/libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java @@ -0,0 +1,135 @@ +/* + * 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.IntKeyframe; + +/** + * This class holds a collection of IntKeyframe 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 + * float, 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 IntKeyframeSet extends KeyframeSet { + private int firstValue; + private int lastValue; + private int deltaValue; + private boolean firstTime = true; + + public IntKeyframeSet(IntKeyframe... keyframes) { + super(keyframes); + } + + @Override + public Object getValue(float fraction) { + return getIntValue(fraction); + } + + @Override + public IntKeyframeSet clone() { + ArrayList<Keyframe> keyframes = mKeyframes; + int numKeyframes = mKeyframes.size(); + IntKeyframe[] newKeyframes = new IntKeyframe[numKeyframes]; + for (int i = 0; i < numKeyframes; ++i) { + newKeyframes[i] = (IntKeyframe) keyframes.get(i).clone(); + } + IntKeyframeSet newSet = new IntKeyframeSet(newKeyframes); + return newSet; + } + + public int getIntValue(float fraction) { + if (mNumKeyframes == 2) { + if (firstTime) { + firstTime = false; + firstValue = ((IntKeyframe) mKeyframes.get(0)).getIntValue(); + lastValue = ((IntKeyframe) mKeyframes.get(1)).getIntValue(); + deltaValue = lastValue - firstValue; + } + if (mInterpolator != null) { + fraction = mInterpolator.getInterpolation(fraction); + } + if (mEvaluator == null) { + return firstValue + (int)(fraction * deltaValue); + } else { + return ((Number)mEvaluator.evaluate(fraction, firstValue, lastValue)).intValue(); + } + } + if (fraction <= 0f) { + final IntKeyframe prevKeyframe = (IntKeyframe) mKeyframes.get(0); + final IntKeyframe nextKeyframe = (IntKeyframe) mKeyframes.get(1); + int prevValue = prevKeyframe.getIntValue(); + int nextValue = nextKeyframe.getIntValue(); + 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 + (int)(intervalFraction * (nextValue - prevValue)) : + ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)). + intValue(); + } else if (fraction >= 1f) { + final IntKeyframe prevKeyframe = (IntKeyframe) mKeyframes.get(mNumKeyframes - 2); + final IntKeyframe nextKeyframe = (IntKeyframe) mKeyframes.get(mNumKeyframes - 1); + int prevValue = prevKeyframe.getIntValue(); + int nextValue = nextKeyframe.getIntValue(); + 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 + (int)(intervalFraction * (nextValue - prevValue)) : + ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)).intValue(); + } + IntKeyframe prevKeyframe = (IntKeyframe) mKeyframes.get(0); + for (int i = 1; i < mNumKeyframes; ++i) { + IntKeyframe nextKeyframe = (IntKeyframe) 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()); + int prevValue = prevKeyframe.getIntValue(); + int nextValue = nextKeyframe.getIntValue(); + return mEvaluator == null ? + prevValue + (int)(intervalFraction * (nextValue - prevValue)) : + ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)). + intValue(); + } + prevKeyframe = nextKeyframe; + } + // shouldn't get here + return ((Number)mKeyframes.get(mNumKeyframes - 1).getValue()).intValue(); + } + +} + |