| /* |
| * Copyright (C) 2006 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 android.view.animation; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.util.AttributeSet; |
| import android.util.TypedValue; |
| import android.graphics.RectF; |
| |
| /** |
| * Abstraction for an Animation that can be applied to Views, Surfaces, or |
| * other objects. See the {@link android.view.animation animation package |
| * description file}. |
| */ |
| public abstract class Animation implements Cloneable { |
| /** |
| * Repeat the animation indefinitely. |
| */ |
| public static final int INFINITE = -1; |
| |
| /** |
| * When the animation reaches the end and the repeat count is INFINTE_REPEAT |
| * or a positive value, the animation restarts from the beginning. |
| */ |
| public static final int RESTART = 1; |
| |
| /** |
| * When the animation reaches the end and the repeat count is INFINTE_REPEAT |
| * or a positive value, the animation plays backward (and then forward again). |
| */ |
| public static final int REVERSE = 2; |
| |
| /** |
| * Can be used as the start time to indicate the start time should be the current |
| * time when {@link #getTransformation(long, Transformation)} is invoked for the |
| * first animation frame. This can is useful for short animations. |
| */ |
| public static final int START_ON_FIRST_FRAME = -1; |
| |
| /** |
| * The specified dimension is an absolute number of pixels. |
| */ |
| public static final int ABSOLUTE = 0; |
| |
| /** |
| * The specified dimension holds a float and should be multiplied by the |
| * height or width of the object being animated. |
| */ |
| public static final int RELATIVE_TO_SELF = 1; |
| |
| /** |
| * The specified dimension holds a float and should be multiplied by the |
| * height or width of the parent of the object being animated. |
| */ |
| public static final int RELATIVE_TO_PARENT = 2; |
| |
| /** |
| * Requests that the content being animated be kept in its current Z |
| * order. |
| */ |
| public static final int ZORDER_NORMAL = 0; |
| |
| /** |
| * Requests that the content being animated be forced on top of all other |
| * content for the duration of the animation. |
| */ |
| public static final int ZORDER_TOP = 1; |
| |
| /** |
| * Requests that the content being animated be forced under all other |
| * content for the duration of the animation. |
| */ |
| public static final int ZORDER_BOTTOM = -1; |
| |
| /** |
| * Set by {@link #getTransformation(long, Transformation)} when the animation ends. |
| */ |
| boolean mEnded = false; |
| |
| /** |
| * Set by {@link #getTransformation(long, Transformation)} when the animation starts. |
| */ |
| boolean mStarted = false; |
| |
| /** |
| * Set by {@link #getTransformation(long, Transformation)} when the animation repeats |
| * in REVERSE mode. |
| */ |
| boolean mCycleFlip = false; |
| |
| /** |
| * This value must be set to true by {@link #initialize(int, int, int, int)}. It |
| * indicates the animation was successfully initialized and can be played. |
| */ |
| boolean mInitialized = false; |
| |
| /** |
| * Indicates whether the animation transformation should be applied before the |
| * animation starts. |
| */ |
| boolean mFillBefore = true; |
| |
| /** |
| * Indicates whether the animation transformation should be applied after the |
| * animation ends. |
| */ |
| boolean mFillAfter = false; |
| |
| /** |
| * Indicates whether fillAfter should be taken into account. |
| */ |
| boolean mFillEnabled = false; |
| |
| /** |
| * The time in milliseconds at which the animation must start; |
| */ |
| long mStartTime = -1; |
| |
| /** |
| * The delay in milliseconds after which the animation must start. When the |
| * start offset is > 0, the start time of the animation is startTime + startOffset. |
| */ |
| long mStartOffset; |
| |
| /** |
| * The duration of one animation cycle in milliseconds. |
| */ |
| long mDuration; |
| |
| /** |
| * The number of times the animation must repeat. By default, an animation repeats |
| * indefinitely. |
| */ |
| int mRepeatCount = 0; |
| |
| /** |
| * Indicates how many times the animation was repeated. |
| */ |
| int mRepeated = 0; |
| |
| /** |
| * The behavior of the animation when it repeats. The repeat mode is either |
| * {@link #RESTART} or {@link #REVERSE}. |
| * |
| */ |
| int mRepeatMode = RESTART; |
| |
| /** |
| * The interpolator used by the animation to smooth the movement. |
| */ |
| Interpolator mInterpolator; |
| |
| /** |
| * The animation listener to be notified when the animation starts, ends or repeats. |
| */ |
| AnimationListener mListener; |
| |
| /** |
| * Desired Z order mode during animation. |
| */ |
| private int mZAdjustment; |
| |
| private boolean mMore = true; |
| private boolean mOneMoreTime = true; |
| |
| RectF mPreviousRegion = new RectF(); |
| Transformation mTransformation = new Transformation(); |
| Transformation mPreviousTransformation = new Transformation(); |
| |
| /** |
| * Creates a new animation with a duration of 0ms, the default interpolator, with |
| * fillBefore set to true and fillAfter set to false |
| */ |
| public Animation() { |
| ensureInterpolator(); |
| } |
| |
| /** |
| * Creates a new animation whose parameters come from the specified context and |
| * attributes set. |
| * |
| * @param context the application environment |
| * @param attrs the set of attributes holding the animation parameters |
| */ |
| public Animation(Context context, AttributeSet attrs) { |
| TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Animation); |
| |
| setDuration((long) a.getInt(com.android.internal.R.styleable.Animation_duration, 0)); |
| setStartOffset((long) a.getInt(com.android.internal.R.styleable.Animation_startOffset, 0)); |
| |
| setFillEnabled(a.getBoolean(com.android.internal.R.styleable.Animation_fillEnabled, mFillEnabled)); |
| setFillBefore(a.getBoolean(com.android.internal.R.styleable.Animation_fillBefore, mFillBefore)); |
| setFillAfter(a.getBoolean(com.android.internal.R.styleable.Animation_fillAfter, mFillAfter)); |
| |
| final int resID = a.getResourceId(com.android.internal.R.styleable.Animation_interpolator, 0); |
| if (resID > 0) { |
| setInterpolator(context, resID); |
| } |
| |
| setRepeatCount(a.getInt(com.android.internal.R.styleable.Animation_repeatCount, mRepeatCount)); |
| setRepeatMode(a.getInt(com.android.internal.R.styleable.Animation_repeatMode, RESTART)); |
| |
| setZAdjustment(a.getInt(com.android.internal.R.styleable.Animation_zAdjustment, ZORDER_NORMAL)); |
| |
| ensureInterpolator(); |
| |
| a.recycle(); |
| } |
| |
| @Override |
| protected Animation clone() throws CloneNotSupportedException { |
| final Animation animation = (Animation) super.clone(); |
| animation.mPreviousRegion = new RectF(); |
| animation.mTransformation = new Transformation(); |
| animation.mPreviousTransformation = new Transformation(); |
| return animation; |
| } |
| |
| /** |
| * Reset the initialization state of this animation. |
| * |
| * @see #initialize(int, int, int, int) |
| */ |
| public void reset() { |
| mPreviousRegion.setEmpty(); |
| mPreviousTransformation.clear(); |
| mInitialized = false; |
| mCycleFlip = false; |
| mRepeated = 0; |
| mMore = true; |
| mOneMoreTime = true; |
| } |
| |
| /** |
| * Whether or not the animation has been initialized. |
| * |
| * @return Has this animation been initialized. |
| * @see #initialize(int, int, int, int) |
| */ |
| public boolean isInitialized() { |
| return mInitialized; |
| } |
| |
| /** |
| * Initialize this animation with the dimensions of the object being |
| * animated as well as the objects parents. (This is to support animation |
| * sizes being specifed relative to these dimensions.) |
| * |
| * <p>Objects that interpret a Animations should call this method when |
| * the sizes of the object being animated and its parent are known, and |
| * before calling {@link #getTransformation}. |
| * |
| * |
| * @param width Width of the object being animated |
| * @param height Height of the object being animated |
| * @param parentWidth Width of the animated object's parent |
| * @param parentHeight Height of the animated object's parent |
| */ |
| public void initialize(int width, int height, int parentWidth, int parentHeight) { |
| reset(); |
| mInitialized = true; |
| } |
| |
| /** |
| * Sets the acceleration curve for this animation. The interpolator is loaded as |
| * a resource from the specified context. |
| * |
| * @param context The application environment |
| * @param resID The resource identifier of the interpolator to load |
| * @attr ref android.R.styleable#Animation_interpolator |
| */ |
| public void setInterpolator(Context context, int resID) { |
| setInterpolator(AnimationUtils.loadInterpolator(context, resID)); |
| } |
| |
| /** |
| * Sets the acceleration curve for this animation. Defaults to a linear |
| * interpolation. |
| * |
| * @param i The interpolator which defines the acceleration curve |
| * @attr ref android.R.styleable#Animation_interpolator |
| */ |
| public void setInterpolator(Interpolator i) { |
| mInterpolator = i; |
| } |
| |
| /** |
| * When this animation should start relative to the start time. This is most |
| * useful when composing complex animations using an {@link AnimationSet } |
| * where some of the animations components start at different times. |
| * |
| * @param startOffset When this Animation should start, in milliseconds from |
| * the start time of the root AnimationSet. |
| * @attr ref android.R.styleable#Animation_startOffset |
| */ |
| public void setStartOffset(long startOffset) { |
| mStartOffset = startOffset; |
| } |
| |
| /** |
| * How long this animation should last. The duration cannot be negative. |
| * |
| * @param durationMillis Duration in milliseconds |
| * |
| * @throw java.lang.IllegalArgumentException if the duration is < 0 |
| * |
| * @attr ref android.R.styleable#Animation_duration |
| */ |
| public void setDuration(long durationMillis) { |
| if (durationMillis < 0) { |
| throw new IllegalArgumentException("Animation duration cannot be negative"); |
| } |
| mDuration = durationMillis; |
| } |
| |
| /** |
| * Ensure that the duration that this animation will run is not longer |
| * than <var>durationMillis</var>. In addition to adjusting the duration |
| * itself, this ensures that the repeat count also will not make it run |
| * longer than the given time. |
| * |
| * @param durationMillis The maximum duration the animation is allowed |
| * to run. |
| */ |
| public void restrictDuration(long durationMillis) { |
| if (mStartOffset > durationMillis) { |
| mStartOffset = durationMillis; |
| mDuration = 0; |
| mRepeatCount = 0; |
| return; |
| } |
| |
| long dur = mDuration + mStartOffset; |
| if (dur > durationMillis) { |
| mDuration = dur = durationMillis-mStartOffset; |
| } |
| if (mRepeatCount < 0 || mRepeatCount > durationMillis |
| || (dur*mRepeatCount) > durationMillis) { |
| mRepeatCount = (int)(durationMillis/dur); |
| } |
| } |
| |
| /** |
| * How much to scale the duration by. |
| * |
| * @param scale The amount to scale the duration. |
| */ |
| public void scaleCurrentDuration(float scale) { |
| mDuration = (long) (mDuration * scale); |
| } |
| |
| /** |
| * When this animation should start. When the start time is set to |
| * {@link #START_ON_FIRST_FRAME}, the animation will start the first time |
| * {@link #getTransformation(long, Transformation)} is invoked. The time passed |
| * to this method should be obtained by calling |
| * {@link AnimationUtils#currentAnimationTimeMillis()} instead of |
| * {@link System#currentTimeMillis()}. |
| * |
| * @param startTimeMillis the start time in milliseconds |
| */ |
| public void setStartTime(long startTimeMillis) { |
| mStartTime = startTimeMillis; |
| mStarted = mEnded = false; |
| mCycleFlip = false; |
| mRepeated = 0; |
| mMore = true; |
| } |
| |
| /** |
| * Convenience method to start the animation the first time |
| * {@link #getTransformation(long, Transformation)} is invoked. |
| */ |
| public void start() { |
| setStartTime(-1); |
| } |
| |
| /** |
| * Convenience method to start the animation at the current time in |
| * milliseconds. |
| */ |
| public void startNow() { |
| setStartTime(AnimationUtils.currentAnimationTimeMillis()); |
| } |
| |
| /** |
| * Defines what this animation should do when it reaches the end. This |
| * setting is applied only when the repeat count is either greater than |
| * 0 or {@link #INFINITE}. Defaults to {@link #RESTART}. |
| * |
| * @param repeatMode {@link #RESTART} or {@link #REVERSE} |
| * @attr ref android.R.styleable#Animation_repeatMode |
| */ |
| public void setRepeatMode(int repeatMode) { |
| mRepeatMode = repeatMode; |
| } |
| |
| /** |
| * Sets how many times the animation should be repeated. If the repeat |
| * count is 0, the animation is never repeated. If the repeat count is |
| * greater than 0 or {@link #INFINITE}, the repeat mode will be taken |
| * into account. The repeat count if 0 by default. |
| * |
| * @param repeatCount the number of times the animation should be repeated |
| * @attr ref android.R.styleable#Animation_repeatCount |
| */ |
| public void setRepeatCount(int repeatCount) { |
| if (repeatCount < 0) { |
| repeatCount = INFINITE; |
| } |
| mRepeatCount = repeatCount; |
| } |
| |
| /** |
| * If fillEnabled is true, this animation will apply fillBefore and fillAfter. |
| * |
| * @return true if the animation will take fillBefore and fillAfter into account |
| * @attr ref android.R.styleable#Animation_fillEnabled |
| */ |
| public boolean isFillEnabled() { |
| return mFillEnabled; |
| } |
| |
| /** |
| * If fillEnabled is true, the animation will apply the value of fillBefore and |
| * fillAfter. Otherwise, fillBefore and fillAfter are ignored and the animation |
| * transformation is always applied. |
| * |
| * @param fillEnabled true if the animation should take fillBefore and fillAfter into account |
| * @attr ref android.R.styleable#Animation_fillEnabled |
| * |
| * @see #setFillBefore(boolean) |
| * @see #setFillAfter(boolean) |
| */ |
| public void setFillEnabled(boolean fillEnabled) { |
| mFillEnabled = fillEnabled; |
| } |
| |
| /** |
| * If fillBefore is true, this animation will apply its transformation |
| * before the start time of the animation. Defaults to true if not set. |
| * Note that this applies when using an {@link |
| * android.view.animation.AnimationSet AnimationSet} to chain |
| * animations. The transformation is not applied before the AnimationSet |
| * itself starts. |
| * |
| * @param fillBefore true if the animation should apply its transformation before it starts |
| * @attr ref android.R.styleable#Animation_fillBefore |
| * |
| * @see #setFillEnabled(boolean) |
| */ |
| public void setFillBefore(boolean fillBefore) { |
| mFillBefore = fillBefore; |
| } |
| |
| /** |
| * If fillAfter is true, the transformation that this animation performed |
| * will persist when it is finished. Defaults to false if not set. |
| * Note that this applies when using an {@link |
| * android.view.animation.AnimationSet AnimationSet} to chain |
| * animations. The transformation is not applied before the AnimationSet |
| * itself starts. |
| * |
| * @param fillAfter true if the animation should apply its transformation after it ends |
| * @attr ref android.R.styleable#Animation_fillAfter |
| * |
| * @see #setFillEnabled(boolean) |
| */ |
| public void setFillAfter(boolean fillAfter) { |
| mFillAfter = fillAfter; |
| } |
| |
| /** |
| * Set the Z ordering mode to use while running the animation. |
| * |
| * @param zAdjustment The desired mode, one of {@link #ZORDER_NORMAL}, |
| * {@link #ZORDER_TOP}, or {@link #ZORDER_BOTTOM}. |
| * @attr ref android.R.styleable#Animation_zAdjustment |
| */ |
| public void setZAdjustment(int zAdjustment) { |
| mZAdjustment = zAdjustment; |
| } |
| |
| /** |
| * Gets the acceleration curve type for this animation. |
| * |
| * @return the {@link Interpolator} associated to this animation |
| * @attr ref android.R.styleable#Animation_interpolator |
| */ |
| public Interpolator getInterpolator() { |
| return mInterpolator; |
| } |
| |
| /** |
| * When this animation should start. If the animation has not startet yet, |
| * this method might return {@link #START_ON_FIRST_FRAME}. |
| * |
| * @return the time in milliseconds when the animation should start or |
| * {@link #START_ON_FIRST_FRAME} |
| */ |
| public long getStartTime() { |
| return mStartTime; |
| } |
| |
| /** |
| * How long this animation should last |
| * |
| * @return the duration in milliseconds of the animation |
| * @attr ref android.R.styleable#Animation_duration |
| */ |
| public long getDuration() { |
| return mDuration; |
| } |
| |
| /** |
| * When this animation should start, relative to StartTime |
| * |
| * @return the start offset in milliseconds |
| * @attr ref android.R.styleable#Animation_startOffset |
| */ |
| public long getStartOffset() { |
| return mStartOffset; |
| } |
| |
| /** |
| * Defines what this animation should do when it reaches the end. |
| * |
| * @return either one of {@link #REVERSE} or {@link #RESTART} |
| * @attr ref android.R.styleable#Animation_repeatMode |
| */ |
| public int getRepeatMode() { |
| return mRepeatMode; |
| } |
| |
| /** |
| * Defines how many times the animation should repeat. The default value |
| * is 0. |
| * |
| * @return the number of times the animation should repeat, or {@link #INFINITE} |
| * @attr ref android.R.styleable#Animation_repeatCount |
| */ |
| public int getRepeatCount() { |
| return mRepeatCount; |
| } |
| |
| /** |
| * If fillBefore is true, this animation will apply its transformation |
| * before the start time of the animation. |
| * |
| * @return true if the animation applies its transformation before it starts |
| * @attr ref android.R.styleable#Animation_fillBefore |
| */ |
| public boolean getFillBefore() { |
| return mFillBefore; |
| } |
| |
| /** |
| * If fillAfter is true, this animation will apply its transformation |
| * after the end time of the animation. |
| * |
| * @return true if the animation applies its transformation after it ends |
| * @attr ref android.R.styleable#Animation_fillAfter |
| */ |
| public boolean getFillAfter() { |
| return mFillAfter; |
| } |
| |
| /** |
| * Returns the Z ordering mode to use while running the animation as |
| * previously set by {@link #setZAdjustment}. |
| * |
| * @return Returns one of {@link #ZORDER_NORMAL}, |
| * {@link #ZORDER_TOP}, or {@link #ZORDER_BOTTOM}. |
| * @attr ref android.R.styleable#Animation_zAdjustment |
| */ |
| public int getZAdjustment() { |
| return mZAdjustment; |
| } |
| |
| /** |
| * <p>Indicates whether or not this animation will affect the transformation |
| * matrix. For instance, a fade animation will not affect the matrix whereas |
| * a scale animation will.</p> |
| * |
| * @return true if this animation will change the transformation matrix |
| */ |
| public boolean willChangeTransformationMatrix() { |
| // assume we will change the matrix |
| return true; |
| } |
| |
| /** |
| * <p>Indicates whether or not this animation will affect the bounds of the |
| * animated view. For instance, a fade animation will not affect the bounds |
| * whereas a 200% scale animation will.</p> |
| * |
| * @return true if this animation will change the view's bounds |
| */ |
| public boolean willChangeBounds() { |
| // assume we will change the bounds |
| return true; |
| } |
| |
| /** |
| * <p>Binds an animation listener to this animation. The animation listener |
| * is notified of animation events such as the end of the animation or the |
| * repetition of the animation.</p> |
| * |
| * @param listener the animation listener to be notified |
| */ |
| public void setAnimationListener(AnimationListener listener) { |
| mListener = listener; |
| } |
| |
| /** |
| * Gurantees that this animation has an interpolator. Will use |
| * a AccelerateDecelerateInterpolator is nothing else was specified. |
| */ |
| protected void ensureInterpolator() { |
| if (mInterpolator == null) { |
| mInterpolator = new AccelerateDecelerateInterpolator(); |
| } |
| } |
| |
| /** |
| * Compute a hint at how long the entire animation may last, in milliseconds. |
| * Animations can be written to cause themselves to run for a different |
| * duration than what is computed here, but generally this should be |
| * accurate. |
| */ |
| public long computeDurationHint() { |
| return (getStartOffset() + getDuration()) * (getRepeatCount() + 1); |
| } |
| |
| /** |
| * Gets the transformation to apply at a specified point in time. Implementations of this |
| * method should always replace the specified Transformation or document they are doing |
| * otherwise. |
| * |
| * @param currentTime Where we are in the animation. This is wall clock time. |
| * @param outTransformation A tranformation object that is provided by the |
| * caller and will be filled in by the animation. |
| * @return True if the animation is still running |
| */ |
| public boolean getTransformation(long currentTime, Transformation outTransformation) { |
| if (mStartTime == -1) { |
| mStartTime = currentTime; |
| } |
| |
| final long startOffset = getStartOffset(); |
| final long duration = mDuration; |
| float normalizedTime; |
| if (duration != 0) { |
| normalizedTime = ((float) (currentTime - (mStartTime + startOffset))) / |
| (float) duration; |
| } else { |
| // time is a step-change with a zero duration |
| normalizedTime = currentTime < mStartTime ? 0.0f : 1.0f; |
| } |
| |
| final boolean expired = normalizedTime >= 1.0f; |
| mMore = !expired; |
| |
| if (!mFillEnabled) normalizedTime = Math.max(Math.min(normalizedTime, 1.0f), 0.0f); |
| |
| if ((normalizedTime >= 0.0f || mFillBefore) && (normalizedTime <= 1.0f || mFillAfter)) { |
| if (!mStarted) { |
| if (mListener != null) { |
| mListener.onAnimationStart(this); |
| } |
| mStarted = true; |
| } |
| |
| if (mFillEnabled) normalizedTime = Math.max(Math.min(normalizedTime, 1.0f), 0.0f); |
| |
| if (mCycleFlip) { |
| normalizedTime = 1.0f - normalizedTime; |
| } |
| |
| final float interpolatedTime = mInterpolator.getInterpolation(normalizedTime); |
| applyTransformation(interpolatedTime, outTransformation); |
| } |
| |
| if (expired) { |
| if (mRepeatCount == mRepeated) { |
| if (!mEnded) { |
| if (mListener != null) { |
| mListener.onAnimationEnd(this); |
| } |
| mEnded = true; |
| } |
| } else { |
| if (mRepeatCount > 0) { |
| mRepeated++; |
| } |
| |
| if (mRepeatMode == REVERSE) { |
| mCycleFlip = !mCycleFlip; |
| } |
| |
| mStartTime = -1; |
| mMore = true; |
| |
| if (mListener != null) { |
| mListener.onAnimationRepeat(this); |
| } |
| } |
| } |
| |
| if (!mMore && mOneMoreTime) { |
| mOneMoreTime = false; |
| return true; |
| } |
| |
| return mMore; |
| } |
| |
| /** |
| * <p>Indicates whether this animation has started or not.</p> |
| * |
| * @return true if the animation has started, false otherwise |
| */ |
| public boolean hasStarted() { |
| return mStarted; |
| } |
| |
| /** |
| * <p>Indicates whether this animation has ended or not.</p> |
| * |
| * @return true if the animation has ended, false otherwise |
| */ |
| public boolean hasEnded() { |
| return mEnded; |
| } |
| |
| /** |
| * Helper for getTransformation. Subclasses should implement this to apply |
| * their transforms given an interpolation value. Implementations of this |
| * method should always replace the specified Transformation or document |
| * they are doing otherwise. |
| * |
| * @param interpolatedTime The value of the normalized time (0.0 to 1.0) |
| * after it has been run through the interpolation function. |
| * @param t The Transofrmation object to fill in with the current |
| * transforms. |
| */ |
| protected void applyTransformation(float interpolatedTime, Transformation t) { |
| } |
| |
| /** |
| * Convert the information in the description of a size to an actual |
| * dimension |
| * |
| * @param type One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or |
| * Animation.RELATIVE_TO_PARENT. |
| * @param value The dimension associated with the type parameter |
| * @param size The size of the object being animated |
| * @param parentSize The size of the parent of the object being animated |
| * @return The dimension to use for the animation |
| */ |
| protected float resolveSize(int type, float value, int size, int parentSize) { |
| switch (type) { |
| case ABSOLUTE: |
| return value; |
| case RELATIVE_TO_SELF: |
| return size * value; |
| case RELATIVE_TO_PARENT: |
| return parentSize * value; |
| default: |
| return value; |
| } |
| } |
| |
| /** |
| * @param left |
| * @param top |
| * @param right |
| * @param bottom |
| * @param invalidate |
| * @param transformation |
| * |
| * @hide |
| */ |
| public void getInvalidateRegion(int left, int top, int right, int bottom, |
| RectF invalidate, Transformation transformation) { |
| |
| final RectF previousRegion = mPreviousRegion; |
| |
| invalidate.set(left, top, right, bottom); |
| transformation.getMatrix().mapRect(invalidate); |
| invalidate.union(previousRegion); |
| |
| previousRegion.set(left, top, right, bottom); |
| transformation.getMatrix().mapRect(previousRegion); |
| |
| final Transformation tempTransformation = mTransformation; |
| final Transformation previousTransformation = mPreviousTransformation; |
| |
| tempTransformation.set(transformation); |
| transformation.set(previousTransformation); |
| previousTransformation.set(tempTransformation); |
| } |
| |
| /** |
| * @param left |
| * @param top |
| * @param right |
| * @param bottom |
| * |
| * @hide |
| */ |
| public void initializeInvalidateRegion(int left, int top, int right, int bottom) { |
| final RectF region = mPreviousRegion; |
| region.set(left, top, right, bottom); |
| if (mFillBefore) { |
| final Transformation previousTransformation = mPreviousTransformation; |
| applyTransformation(0.0f, previousTransformation); |
| } |
| } |
| |
| /** |
| * Utility class to parse a string description of a size. |
| */ |
| protected static class Description { |
| /** |
| * One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or |
| * Animation.RELATIVE_TO_PARENT. |
| */ |
| public int type; |
| |
| /** |
| * The absolute or relative dimension for this Description. |
| */ |
| public float value; |
| |
| /** |
| * Size descriptions can appear inthree forms: |
| * <ol> |
| * <li>An absolute size. This is represented by a number.</li> |
| * <li>A size relative to the size of the object being animated. This |
| * is represented by a number followed by "%".</li> * |
| * <li>A size relative to the size of the parent of object being |
| * animated. This is represented by a number followed by "%p".</li> |
| * </ol> |
| * @param value The typed value to parse |
| * @return The parsed version of the description |
| */ |
| static Description parseValue(TypedValue value) { |
| Description d = new Description(); |
| if (value == null) { |
| d.type = ABSOLUTE; |
| d.value = 0; |
| } else { |
| if (value.type == TypedValue.TYPE_FRACTION) { |
| d.type = (value.data & TypedValue.COMPLEX_UNIT_MASK) == |
| TypedValue.COMPLEX_UNIT_FRACTION_PARENT ? |
| RELATIVE_TO_PARENT : RELATIVE_TO_SELF; |
| d.value = TypedValue.complexToFloat(value.data); |
| return d; |
| } else if (value.type == TypedValue.TYPE_FLOAT) { |
| d.type = ABSOLUTE; |
| d.value = value.getFloat(); |
| return d; |
| } else if (value.type >= TypedValue.TYPE_FIRST_INT && |
| value.type <= TypedValue.TYPE_LAST_INT) { |
| d.type = ABSOLUTE; |
| d.value = value.data; |
| return d; |
| } |
| } |
| |
| d.type = ABSOLUTE; |
| d.value = 0.0f; |
| |
| return d; |
| } |
| } |
| |
| /** |
| * <p>An animation listener receives notifications from an animation. |
| * Notifications indicate animation related events, such as the end or the |
| * repetition of the animation.</p> |
| */ |
| public static interface AnimationListener { |
| /** |
| * <p>Notifies the start of the animation.</p> |
| * |
| * @param animation The started animation. |
| */ |
| void onAnimationStart(Animation animation); |
| |
| /** |
| * <p>Notifies the end of the animation. This callback is not invoked |
| * for animations with repeat count set to INFINITE.</p> |
| * |
| * @param animation The animation which reached its end. |
| */ |
| void onAnimationEnd(Animation animation); |
| |
| /** |
| * <p>Notifies the repetition of the animation.</p> |
| * |
| * @param animation The animation which was repeated. |
| */ |
| void onAnimationRepeat(Animation animation); |
| } |
| } |
