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/*
* Copyright (C) 2015 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.android.tv.common.ui.setup.animation;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.TypeEvaluator;
import android.content.Context;
import android.transition.Transition;
import android.transition.TransitionSet;
import android.view.Gravity;
import android.view.View;
import android.widget.ImageView;
import com.android.tv.common.R;
/** A helper class for setup animation. */
public final class SetupAnimationHelper {
public static final long DELAY_BETWEEN_SIBLINGS_MS = applyAnimationTimeScale(33);
private static final float ANIMATION_TIME_SCALE = 1.0f;
private static boolean sInitialized;
private static long sFragmentTransitionDuration;
private static int sFragmentTransitionLongDistance;
private static int sFragmentTransitionShortDistance;
private SetupAnimationHelper() {}
/** Load initial parameters. This method should be called before using this class. */
public static void initialize(Context context) {
if (sInitialized) {
return;
}
sFragmentTransitionDuration =
context.getResources().getInteger(R.integer.setup_fragment_transition_duration);
sFragmentTransitionLongDistance =
context.getResources()
.getDimensionPixelOffset(R.dimen.setup_fragment_transition_long_distance);
sFragmentTransitionShortDistance =
context.getResources()
.getDimensionPixelOffset(R.dimen.setup_fragment_transition_short_distance);
sInitialized = true;
}
private static void checkInitialized() {
if (!sInitialized) {
throw new IllegalStateException("SetupAnimationHelper not initialized");
}
}
public static class TransitionBuilder {
private int mSlideEdge = Gravity.START;
private final int mDistance = sFragmentTransitionLongDistance;
private long mDuration = sFragmentTransitionDuration;
private int[] mParentIdForDelay;
private int[] mExcludeIds;
public TransitionBuilder() {
checkInitialized();
}
/**
* Sets the edge of the slide transition.
*
* @see android.transition.Slide#setSlideEdge
*/
public TransitionBuilder setSlideEdge(int slideEdge) {
mSlideEdge = slideEdge;
return this;
}
/** Sets the duration of the transition. */
public TransitionBuilder setDuration(long duration) {
mDuration = duration;
return this;
}
/**
* Sets the ID of the view whose descendants will perform delayed move.
*
* @see android.view.ViewGroup#isTransitionGroup
*/
public TransitionBuilder setParentIdsForDelay(int[] parentIdForDelay) {
mParentIdForDelay = parentIdForDelay;
return this;
}
/** Sets the ID's of the views which will not be included in the transition. */
public TransitionBuilder setExcludeIds(int[] excludeIds) {
mExcludeIds = excludeIds;
return this;
}
/** Builds and returns the {@link android.transition.Transition}. */
public Transition build() {
FadeAndShortSlide transition = new FadeAndShortSlide(mSlideEdge, mParentIdForDelay);
transition.setDistance(mDistance);
transition.setDuration(mDuration);
if (mExcludeIds != null) {
for (int id : mExcludeIds) {
transition.excludeTarget(id, true);
}
}
return transition;
}
}
/** Changes the move distance of the {@code transition} to long distance. */
public static void setLongDistance(FadeAndShortSlide transition) {
checkInitialized();
transition.setDistance(sFragmentTransitionLongDistance);
}
/** Changes the move distance of the {@code transition} to short distance. */
public static void setShortDistance(FadeAndShortSlide transition) {
checkInitialized();
transition.setDistance(sFragmentTransitionShortDistance);
}
/** Applies the animation scale to the given {@code animator}. */
public static Animator applyAnimationTimeScale(Animator animator) {
if (animator instanceof AnimatorSet) {
for (Animator child : ((AnimatorSet) animator).getChildAnimations()) {
applyAnimationTimeScale(child);
}
}
if (animator.getDuration() > 0) {
animator.setDuration((long) (animator.getDuration() * ANIMATION_TIME_SCALE));
}
animator.setStartDelay((long) (animator.getStartDelay() * ANIMATION_TIME_SCALE));
return animator;
}
/** Applies the animation scale to the given {@code transition}. */
public static Transition applyAnimationTimeScale(Transition transition) {
if (transition instanceof TransitionSet) {
TransitionSet set = (TransitionSet) transition;
int count = set.getTransitionCount();
for (int i = 0; i < count; ++i) {
applyAnimationTimeScale(set.getTransitionAt(i));
}
}
if (transition.getDuration() > 0) {
transition.setDuration((long) (transition.getDuration() * ANIMATION_TIME_SCALE));
}
transition.setStartDelay((long) (transition.getStartDelay() * ANIMATION_TIME_SCALE));
return transition;
}
/** Applies the animation scale to the given {@code time}. */
public static long applyAnimationTimeScale(long time) {
return (long) (time * ANIMATION_TIME_SCALE);
}
/**
* Returns an animator which animates the source image of the {@link ImageView}.
*
* <p>The frame rate is 60 fps.
*/
public static ObjectAnimator createFrameAnimator(ImageView imageView, int[] frames) {
return createFrameAnimatorWithDelay(imageView, frames, 0);
}
/**
* Returns an animator which animates the source image of the {@link ImageView} with start
* delay.
*
* <p>The frame rate is 60 fps.
*/
public static ObjectAnimator createFrameAnimatorWithDelay(
ImageView imageView, int[] frames, long startDelay) {
ObjectAnimator animator = ObjectAnimator.ofInt(imageView, "imageResource", frames);
// Make it 60 fps.
animator.setDuration(frames.length * 1000 / 60);
animator.setInterpolator(null);
animator.setStartDelay(startDelay);
animator.setEvaluator(
new TypeEvaluator<Integer>() {
@Override
public Integer evaluate(float fraction, Integer startValue, Integer endValue) {
return startValue;
}
});
return animator;
}
/**
* Creates a fade out animator.
*
* @param view The view which will be animated.
* @param duration The duration of the animation.
* @param makeVisibleAfterAnimation If {@code true}, the view will become visible after the
* animation ends.
*/
public static Animator createFadeOutAnimator(
final View view, long duration, boolean makeVisibleAfterAnimation) {
ObjectAnimator animator =
ObjectAnimator.ofFloat(view, View.ALPHA, 1.0f, 0.0f).setDuration(duration);
if (makeVisibleAfterAnimation) {
animator.addListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
view.setAlpha(1.0f);
}
});
}
return animator;
}
}
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