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/*
* Copyright (C) 2021 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.launcher3.taskbar;
import static com.android.launcher3.LauncherState.TASKBAR;
import android.animation.Animator;
import com.android.launcher3.BaseQuickstepLauncher;
import com.android.launcher3.Utilities;
import com.android.launcher3.taskbar.LauncherTaskbarUIController.TaskbarAnimationControllerCallbacks;
import com.android.quickstep.AnimatedFloat;
import com.android.quickstep.SystemUiProxy;
import com.android.systemui.shared.system.QuickStepContract;
/**
* Works with TaskbarController to update the TaskbarView's visual properties based on factors such
* as LauncherState, whether Launcher is in the foreground, etc.
*/
public class TaskbarAnimationController {
private static final long IME_VISIBILITY_ALPHA_DURATION = 120;
private final BaseQuickstepLauncher mLauncher;
private final TaskbarAnimationControllerCallbacks mTaskbarCallbacks;
// Background alpha.
private final AnimatedFloat mTaskbarBackgroundAlpha = new AnimatedFloat(
this::onTaskbarBackgroundAlphaChanged);
// Overall visibility.
private final AnimatedFloat mTaskbarVisibilityAlphaForLauncherState = new AnimatedFloat(
this::updateVisibilityAlpha);
private final AnimatedFloat mTaskbarVisibilityAlphaForIme = new AnimatedFloat(
this::updateVisibilityAlphaForIme);
// Scale.
private final AnimatedFloat mTaskbarScaleForLauncherState = new AnimatedFloat(
this::updateScale);
// TranslationY.
private final AnimatedFloat mTaskbarTranslationYForLauncherState = new AnimatedFloat(
this::updateTranslationY);
public TaskbarAnimationController(BaseQuickstepLauncher launcher,
TaskbarAnimationControllerCallbacks taskbarCallbacks) {
mLauncher = launcher;
mTaskbarCallbacks = taskbarCallbacks;
}
protected void init() {
mTaskbarBackgroundAlpha.updateValue(mLauncher.hasBeenResumed() ? 0f : 1f);
boolean isVisibleForLauncherState = (mLauncher.getStateManager().getState()
.getVisibleElements(mLauncher) & TASKBAR) != 0;
mTaskbarVisibilityAlphaForLauncherState.updateValue(isVisibleForLauncherState ? 1f : 0f);
boolean isImeVisible = (SystemUiProxy.INSTANCE.get(mLauncher).getLastSystemUiStateFlags()
& QuickStepContract.SYSUI_STATE_IME_SHOWING) != 0;
mTaskbarVisibilityAlphaForIme.updateValue(isImeVisible ? 0f : 1f);
onTaskbarBackgroundAlphaChanged();
updateVisibilityAlpha();
}
protected void cleanup() {
setNavBarButtonAlpha(1f);
}
protected AnimatedFloat getTaskbarVisibilityForLauncherState() {
return mTaskbarVisibilityAlphaForLauncherState;
}
protected AnimatedFloat getTaskbarScaleForLauncherState() {
return mTaskbarScaleForLauncherState;
}
protected AnimatedFloat getTaskbarTranslationYForLauncherState() {
return mTaskbarTranslationYForLauncherState;
}
protected Animator createAnimToBackgroundAlpha(float toAlpha, long duration) {
return mTaskbarBackgroundAlpha.animateToValue(mTaskbarBackgroundAlpha.value, toAlpha)
.setDuration(duration);
}
protected void animateToVisibilityForIme(float toAlpha) {
mTaskbarVisibilityAlphaForIme.animateToValue(mTaskbarVisibilityAlphaForIme.value, toAlpha)
.setDuration(IME_VISIBILITY_ALPHA_DURATION).start();
}
private void onTaskbarBackgroundAlphaChanged() {
mTaskbarCallbacks.updateTaskbarBackgroundAlpha(mTaskbarBackgroundAlpha.value);
updateVisibilityAlpha();
updateScale();
updateTranslationY();
}
private void updateVisibilityAlpha() {
// We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
// assumption being that Taskbar should always be visible regardless of the current
// LauncherState if Launcher is paused.
float alphaDueToIme = mTaskbarVisibilityAlphaForIme.value;
float alphaDueToLauncher = Math.max(mTaskbarBackgroundAlpha.value,
mTaskbarVisibilityAlphaForLauncherState.value);
float taskbarAlpha = alphaDueToLauncher * alphaDueToIme;
mTaskbarCallbacks.updateTaskbarVisibilityAlpha(taskbarAlpha);
// Make the nav bar invisible if taskbar is visible.
setNavBarButtonAlpha(1f - taskbarAlpha);
}
private void updateVisibilityAlphaForIme() {
updateVisibilityAlpha();
float taskbarAlphaDueToIme = mTaskbarVisibilityAlphaForIme.value;
mTaskbarCallbacks.updateImeBarVisibilityAlpha(1f - taskbarAlphaDueToIme);
}
private void updateScale() {
// We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
// assumption being that Taskbar should always be at scale 1f regardless of the current
// LauncherState if Launcher is paused.
float scale = mTaskbarScaleForLauncherState.value;
scale = Utilities.mapRange(mTaskbarBackgroundAlpha.value, scale, 1f);
mTaskbarCallbacks.updateTaskbarScale(scale);
}
private void updateTranslationY() {
// We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
// assumption being that Taskbar should always be at translationY 0f regardless of the
// current LauncherState if Launcher is paused.
float translationY = mTaskbarTranslationYForLauncherState.value;
translationY = Utilities.mapRange(mTaskbarBackgroundAlpha.value, translationY, 0f);
mTaskbarCallbacks.updateTaskbarTranslationY(translationY);
}
private void setNavBarButtonAlpha(float navBarAlpha) {
SystemUiProxy.INSTANCE.get(mLauncher).setNavBarButtonAlpha(navBarAlpha, false);
}
}
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