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/*
* Copyright (C) 2019 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.uioverrides;
import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_FADE;
import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_SCALE;
import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_TRANSLATE;
import static com.android.launcher3.anim.AnimatorSetBuilder.FLAG_DONT_ANIMATE_OVERVIEW;
import static com.android.launcher3.anim.Interpolators.AGGRESSIVE_EASE_IN_OUT;
import static com.android.launcher3.anim.Interpolators.LINEAR;
import android.util.FloatProperty;
import android.view.View;
import android.view.animation.Interpolator;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
import com.android.launcher3.LauncherState.ScaleAndTranslation;
import com.android.launcher3.LauncherStateManager.AnimationConfig;
import com.android.launcher3.LauncherStateManager.StateHandler;
import com.android.launcher3.anim.AnimatorSetBuilder;
import com.android.launcher3.anim.PropertySetter;
import androidx.annotation.NonNull;
/**
* State handler for recents view. Manages UI changes and animations for recents view based off the
* current {@link LauncherState}.
*
* @param <T> the recents view
*/
public abstract class BaseRecentsViewStateController<T extends View>
implements StateHandler {
protected final T mRecentsView;
protected final Launcher mLauncher;
public BaseRecentsViewStateController(@NonNull Launcher launcher) {
mLauncher = launcher;
mRecentsView = launcher.getOverviewPanel();
}
@Override
public void setState(@NonNull LauncherState state) {
ScaleAndTranslation scaleAndTranslation = state
.getOverviewScaleAndTranslation(mLauncher);
SCALE_PROPERTY.set(mRecentsView, scaleAndTranslation.scale);
float translationX = scaleAndTranslation.translationX;
if (mRecentsView.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
translationX = -translationX;
}
mRecentsView.setTranslationX(translationX);
mRecentsView.setTranslationY(scaleAndTranslation.translationY);
getContentAlphaProperty().set(mRecentsView, state.overviewUi ? 1f : 0);
}
@Override
public final void setStateWithAnimation(@NonNull final LauncherState toState,
@NonNull AnimatorSetBuilder builder, @NonNull AnimationConfig config) {
boolean playAtomicOverviewComponent = config.playAtomicOverviewScaleComponent()
|| config.playAtomicOverviewPeekComponent();
if (!playAtomicOverviewComponent) {
// The entire recents animation is played atomically.
return;
}
if (builder.hasFlag(FLAG_DONT_ANIMATE_OVERVIEW)) {
return;
}
setStateWithAnimationInternal(toState, builder, config);
}
/**
* Core logic for animating the recents view UI.
*
* @param toState state to animate to
* @param builder animator set builder
* @param config current animation config
*/
void setStateWithAnimationInternal(@NonNull final LauncherState toState,
@NonNull AnimatorSetBuilder builder, @NonNull AnimationConfig config) {
PropertySetter setter = config.getPropertySetter(builder);
ScaleAndTranslation scaleAndTranslation = toState.getOverviewScaleAndTranslation(mLauncher);
Interpolator scaleInterpolator = builder.getInterpolator(ANIM_OVERVIEW_SCALE, LINEAR);
setter.setFloat(mRecentsView, SCALE_PROPERTY, scaleAndTranslation.scale, scaleInterpolator);
Interpolator translateInterpolator = builder.getInterpolator(
ANIM_OVERVIEW_TRANSLATE, LINEAR);
float translationX = scaleAndTranslation.translationX;
if (mRecentsView.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
translationX = -translationX;
}
setter.setFloat(mRecentsView, View.TRANSLATION_X, translationX, translateInterpolator);
setter.setFloat(mRecentsView, View.TRANSLATION_Y, scaleAndTranslation.translationY,
translateInterpolator);
setter.setFloat(mRecentsView, getContentAlphaProperty(), toState.overviewUi ? 1 : 0,
builder.getInterpolator(ANIM_OVERVIEW_FADE, AGGRESSIVE_EASE_IN_OUT));
}
/**
* Get property for content alpha for the recents view.
*
* @return the float property for the view's content alpha
*/
abstract FloatProperty getContentAlphaProperty();
}
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