72 lines
2.7 KiB
Java
72 lines
2.7 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.colorfulos.uioverrides;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.ValueAnimator;
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import com.android.colorfulos.Launcher;
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import com.android.colorfulos.LauncherState;
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import com.android.colorfulos.LauncherStateManager;
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import com.android.colorfulos.anim.AnimatorSetBuilder;
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import com.android.quickstep.OverviewInteractionState;
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public class BackButtonAlphaHandler implements LauncherStateManager.StateHandler {
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private static final String TAG = "BackButtonAlphaHandler";
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private final Launcher mLauncher;
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private final OverviewInteractionState mOverviewInteractionState;
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public BackButtonAlphaHandler(Launcher launcher) {
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mLauncher = launcher;
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mOverviewInteractionState = OverviewInteractionState.INSTANCE.get(mLauncher);
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}
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@Override
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public void setState(LauncherState state) {
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UiFactory.onLauncherStateOrFocusChanged(mLauncher);
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}
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@Override
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public void setStateWithAnimation(LauncherState toState,
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AnimatorSetBuilder builder, LauncherStateManager.AnimationConfig config) {
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if (!config.playNonAtomicComponent()) {
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return;
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}
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float fromAlpha = mOverviewInteractionState.getBackButtonAlpha();
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float toAlpha = toState.hideBackButton ? 0 : 1;
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if (Float.compare(fromAlpha, toAlpha) != 0) {
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ValueAnimator anim = ValueAnimator.ofFloat(fromAlpha, toAlpha);
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anim.setDuration(config.duration);
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anim.addUpdateListener(valueAnimator -> {
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final float alpha = (float) valueAnimator.getAnimatedValue();
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mOverviewInteractionState.setBackButtonAlpha(alpha, false);
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});
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anim.addListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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// Reapply the final alpha in case some state (e.g. window focus) changed.
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UiFactory.onLauncherStateOrFocusChanged(mLauncher);
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}
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});
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builder.play(anim);
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}
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}
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}
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