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/*
* Copyright (C) 2017 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.LauncherState.NORMAL;
import static com.android.launcher3.LauncherState.OVERVIEW;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.view.View;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
import com.android.launcher3.LauncherStateManager.AnimationConfig;
import com.android.launcher3.LauncherStateManager.StateHandler;
import com.android.launcher3.PagedView;
import com.android.launcher3.Utilities;
import com.android.launcher3.anim.AnimationSuccessListener;
import com.android.launcher3.anim.AnimatorSetBuilder;
import com.android.launcher3.anim.Interpolators;
import com.android.quickstep.AnimatedFloat;
import com.android.quickstep.RecentsView;
public class RecentsViewStateController implements StateHandler {
private final Launcher mLauncher;
private final RecentsView mRecentsView;
private final WorkspaceCard mWorkspaceCard;
private final AnimatedFloat mTransitionProgress = new AnimatedFloat(this::onTransitionProgress);
// The fraction representing the visibility of the RecentsView. This allows delaying the
// overall transition while the RecentsView is being shown or hidden.
private final AnimatedFloat mVisibilityMultiplier = new AnimatedFloat(this::onVisibilityProgress);
private boolean mIsRecentsScrollingToFirstTask;
public RecentsViewStateController(Launcher launcher) {
mLauncher = launcher;
mRecentsView = launcher.getOverviewPanel();
mRecentsView.setStateController(this);
mWorkspaceCard = (WorkspaceCard) mRecentsView.getChildAt(0);
mWorkspaceCard.setup(launcher);
}
@Override
public void setState(LauncherState state) {
mWorkspaceCard.setWorkspaceScrollingEnabled(state == OVERVIEW);
setVisibility(state == OVERVIEW);
setTransitionProgress(state == OVERVIEW ? 1 : 0);
}
@Override
public void setStateWithAnimation(final LauncherState toState,
AnimatorSetBuilder builder, AnimationConfig config) {
boolean settingEnabled = Utilities.getPrefs(mLauncher)
.getBoolean("pref_scroll_to_first_task", false);
mIsRecentsScrollingToFirstTask = mLauncher.isInState(NORMAL) && toState == OVERVIEW
&& settingEnabled;
// Scroll to the workspace card before changing to the NORMAL state.
int currPage = mRecentsView.getCurrentPage();
if (toState == NORMAL && currPage != 0 && !config.userControlled) {
int maxSnapDuration = PagedView.SLOW_PAGE_SNAP_ANIMATION_DURATION;
int durationPerPage = maxSnapDuration / 10;
int snapDuration = Math.min(maxSnapDuration, durationPerPage * currPage);
mRecentsView.snapToPage(0, snapDuration);
builder.setStartDelay(snapDuration);
}
ObjectAnimator progressAnim =
mTransitionProgress.animateToValue(toState == OVERVIEW ? 1 : 0);
progressAnim.setDuration(config.duration);
progressAnim.setInterpolator(Interpolators.LINEAR);
progressAnim.addListener(new AnimationSuccessListener() {
@Override
public void onAnimationStart(Animator animation) {
mWorkspaceCard.setWorkspaceScrollingEnabled(mIsRecentsScrollingToFirstTask);
}
@Override
public void onAnimationSuccess(Animator animator) {
mWorkspaceCard.setWorkspaceScrollingEnabled(toState == OVERVIEW);
mRecentsView.setCurrentPage(mRecentsView.getPageNearestToCenterOfScreen());
}
});
builder.play(progressAnim);
ObjectAnimator visibilityAnim = animateVisibility(toState == OVERVIEW);
visibilityAnim.setDuration(config.duration);
visibilityAnim.setInterpolator(Interpolators.LINEAR);
builder.play(visibilityAnim);
}
public void setVisibility(boolean isVisible) {
mVisibilityMultiplier.cancelAnimation();
mRecentsView.setVisibility(isVisible ? View.VISIBLE : View.GONE);
mVisibilityMultiplier.updateValue(isVisible ? 1 : 0);
}
public ObjectAnimator animateVisibility(boolean isVisible) {
ObjectAnimator anim = mVisibilityMultiplier.animateToValue(isVisible ? 1 : 0);
if (isVisible) {
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
mRecentsView.setVisibility(View.VISIBLE);
}
});
} else {
anim.addListener(new AnimationSuccessListener() {
@Override
public void onAnimationSuccess(Animator animator) {
mRecentsView.setVisibility(View.GONE);
}
});
}
return anim;
}
public void setTransitionProgress(float progress) {
mTransitionProgress.cancelAnimation();
mTransitionProgress.updateValue(progress);
}
private void onTransitionProgress() {
applyProgress();
if (mIsRecentsScrollingToFirstTask) {
int scrollForFirstTask = mRecentsView.getScrollForPage(mRecentsView.getFirstTaskIndex());
mRecentsView.setScrollX((int) (mTransitionProgress.value * scrollForFirstTask));
}
}
private void onVisibilityProgress() {
applyProgress();
}
private void applyProgress() {
mRecentsView.setAlpha(mTransitionProgress.value * mVisibilityMultiplier.value);
}
}
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