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/*
* Copyright (C) 2014 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.keyguard;
import android.content.Context;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
/**
* A class to make nice appear transitions for views in a tabular layout.
*/
public class AppearAnimationUtils implements AppearAnimationCreator<View> {
public static final long APPEAR_DURATION = 220;
private final Interpolator mLinearOutSlowIn;
private final float mStartTranslation;
private final AppearAnimationProperties mProperties = new AppearAnimationProperties();
private final float mDelayScale;
public AppearAnimationUtils(Context ctx) {
this(ctx, 1.0f, 1.0f);
}
public AppearAnimationUtils(Context ctx, float delayScaleFactor,
float translationScaleFactor) {
mLinearOutSlowIn = AnimationUtils.loadInterpolator(
ctx, android.R.interpolator.linear_out_slow_in);
mStartTranslation = ctx.getResources().getDimensionPixelOffset(
R.dimen.appear_y_translation_start) * translationScaleFactor;
mDelayScale = delayScaleFactor;
}
public void startAppearAnimation(View[][] objects, final Runnable finishListener) {
startAppearAnimation(objects, finishListener, this);
}
public <T> void startAppearAnimation(T[][] objects, final Runnable finishListener,
AppearAnimationCreator<T> creator) {
AppearAnimationProperties properties = getDelays(objects);
startAnimations(properties, objects, finishListener, creator);
}
private <T> void startAnimations(AppearAnimationProperties properties, T[][] objects,
final Runnable finishListener, AppearAnimationCreator creator) {;
if (properties.maxDelayRowIndex == -1 || properties.maxDelayColIndex == -1) {
finishListener.run();
return;
}
for (int row = 0; row < properties.delays.length; row++) {
long[] columns = properties.delays[row];
for (int col = 0; col < columns.length; col++) {
long delay = columns[col];
Runnable endRunnable = null;
if (properties.maxDelayRowIndex == row && properties.maxDelayColIndex == col) {
endRunnable = finishListener;
}
creator.createAnimation(objects[row][col], delay, APPEAR_DURATION,
mStartTranslation, mLinearOutSlowIn, endRunnable);
}
}
}
private <T> AppearAnimationProperties getDelays(T[][] items) {
long maxDelay = 0;
mProperties.maxDelayColIndex = -1;
mProperties.maxDelayRowIndex = -1;
mProperties.delays = new long[items.length][];
for (int row = 0; row < items.length; row++) {
T[] columns = items[row];
mProperties.delays[row] = new long[columns.length];
for (int col = 0; col < columns.length; col++) {
long delay = calculateDelay(row, col);
mProperties.delays[row][col] = delay;
if (items[row][col] != null && delay > maxDelay) {
maxDelay = delay;
mProperties.maxDelayColIndex = col;
mProperties.maxDelayRowIndex = row;
}
}
}
return mProperties;
}
private long calculateDelay(int row, int col) {
return (long) ((row * 40 + col * (Math.pow(row, 0.4) + 0.4) * 20) * mDelayScale);
}
public Interpolator getInterpolator() {
return mLinearOutSlowIn;
}
public float getStartTranslation() {
return mStartTranslation;
}
@Override
public void createAnimation(View view, long delay, long duration, float startTranslationY,
Interpolator interpolator, Runnable endRunnable) {
if (view != null) {
view.setAlpha(0f);
view.setTranslationY(startTranslationY);
view.animate()
.alpha(1f)
.translationY(0)
.setInterpolator(interpolator)
.setDuration(duration)
.setStartDelay(delay);
if (view.hasOverlappingRendering()) {
view.animate().withLayer();
}
if (endRunnable != null) {
view.animate().withEndAction(endRunnable);
}
}
}
public class AppearAnimationProperties {
public long[][] delays;
public int maxDelayRowIndex;
public int maxDelayColIndex;
}
}
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