Sunny Goyal
d6801af69a
Bug: 243022799 Test: Presubmit Change-Id: I3706fc1f10d88ea73bd873c7e94c3e78795791eb
65 lines
2.4 KiB
Java
65 lines
2.4 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.launcher3.statehandlers;
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import static com.android.launcher3.anim.Interpolators.LINEAR;
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import static com.android.launcher3.util.DisplayController.NavigationMode.TWO_BUTTONS;
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import static com.android.quickstep.AnimatedFloat.VALUE;
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import com.android.launcher3.LauncherState;
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import com.android.launcher3.anim.PendingAnimation;
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import com.android.launcher3.statemanager.StateManager.StateHandler;
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import com.android.launcher3.states.StateAnimationConfig;
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import com.android.launcher3.uioverrides.QuickstepLauncher;
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import com.android.launcher3.util.DisplayController;
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import com.android.launcher3.util.UiThreadHelper;
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import com.android.quickstep.AnimatedFloat;
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import com.android.quickstep.SystemUiProxy;
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/**
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* State handler for animating back button alpha in two-button nav mode.
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*/
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public class BackButtonAlphaHandler implements StateHandler<LauncherState> {
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private final QuickstepLauncher mLauncher;
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private final AnimatedFloat mBackAlpha = new AnimatedFloat(this::updateBackAlpha);
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public BackButtonAlphaHandler(QuickstepLauncher launcher) {
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mLauncher = launcher;
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}
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@Override
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public void setState(LauncherState state) { }
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@Override
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public void setStateWithAnimation(LauncherState toState, StateAnimationConfig config,
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PendingAnimation animation) {
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if (DisplayController.getNavigationMode(mLauncher) != TWO_BUTTONS) {
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return;
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}
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mBackAlpha.value = SystemUiProxy.INSTANCE.get(mLauncher).getLastNavButtonAlpha();
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animation.setFloat(mBackAlpha, VALUE,
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mLauncher.shouldBackButtonBeHidden(toState) ? 0 : 1, LINEAR);
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}
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private void updateBackAlpha() {
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UiThreadHelper.setBackButtonAlphaAsync(mLauncher,
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QuickstepLauncher.SET_BACK_BUTTON_ALPHA, mBackAlpha.value, false /* animate */);
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}
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}
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