Align widget picker bottom swipe transition with predictive back.

Bug: 325930715
Test: widget picker tests
Flag: NA
Change-Id: I15319f0a264503ff34dd4cc0dc36a40531379e2b

quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsSlideInView.java

@@ -207,10 +207,10 @@ public class TaskbarAllAppsSlideInView extends AbstractSlideInView<TaskbarOverla
     }
 
     @Override
-    protected void onScaleProgressChanged() {
-        super.onScaleProgressChanged();
-        mAppsView.setClipChildren(!mIsBackProgressing);
-        mAppsView.getAppsRecyclerViewContainer().setClipChildren(!mIsBackProgressing);
+    protected void onUserSwipeToDismissProgressChanged() {
+        super.onUserSwipeToDismissProgressChanged();
+        mAppsView.setClipChildren(!mIsDismissInProgress);
+        mAppsView.getAppsRecyclerViewContainer().setClipChildren(!mIsDismissInProgress);
     }
 
     @Override
@@ -264,7 +264,7 @@ public class TaskbarAllAppsSlideInView extends AbstractSlideInView<TaskbarOverla
         if (mAllAppsCallbacks.handleSearchBackInvoked()) {
             // We need to scale back taskbar all apps if we navigate back within search inside all
             // apps
-            animateSlideInViewToNoScale();
+            animateSwipeToDismissProgressToStart();
         } else {
             super.onBackInvoked();
         }

src/com/android/launcher3/views/AbstractSlideInView.java

@@ -82,7 +82,6 @@ public abstract class AbstractSlideInView<T extends Context & ActivityContext>
             };
     protected static final float TRANSLATION_SHIFT_CLOSED = 1f;
     protected static final float TRANSLATION_SHIFT_OPENED = 0f;
-    private static final float VIEW_NO_SCALE = 1f;
     private static final int DEFAULT_DURATION = 300;
 
     protected final T mActivityContext;
@@ -129,9 +128,13 @@ public abstract class AbstractSlideInView<T extends Context & ActivityContext>
     protected @Nullable OnCloseListener mOnCloseBeginListener;
     protected List<OnCloseListener> mOnCloseListeners = new ArrayList<>();
 
-    protected final AnimatedFloat mSlideInViewScale =
-            new AnimatedFloat(this::onScaleProgressChanged, VIEW_NO_SCALE);
-    protected boolean mIsBackProgressing;
+    /**
+     * How far through a "user initiated dismissal" the UI is. e.g. Predictive back, swipe to home,
+     * 0 is regular state, 1 is fully dismissed.
+     */
+    protected final AnimatedFloat mSwipeToDismissProgress =
+            new AnimatedFloat(this::onUserSwipeToDismissProgressChanged, 0f);
+    protected boolean mIsDismissInProgress;
     private @Nullable Drawable mContentBackground;
     private @Nullable View mContentBackgroundParentView;
 
@@ -287,29 +290,30 @@ public abstract class AbstractSlideInView<T extends Context & ActivityContext>
         final float progress = backEvent.getProgress();
         float deceleratedProgress =
                 Interpolators.PREDICTIVE_BACK_DECELERATED_EASE.getInterpolation(progress);
-        mIsBackProgressing = progress > 0f;
-        mSlideInViewScale.updateValue(PREDICTIVE_BACK_MIN_SCALE
-                + (1 - PREDICTIVE_BACK_MIN_SCALE) * (1 - deceleratedProgress));
+        mSwipeToDismissProgress.updateValue(deceleratedProgress);
     }
 
-    protected void onScaleProgressChanged() {
-        float scaleProgress = mSlideInViewScale.value;
-        SCALE_PROPERTY.set(this, scaleProgress);
-        setClipChildren(!mIsBackProgressing);
-        setClipToPadding(!mIsBackProgressing);
-        mContent.setClipChildren(!mIsBackProgressing);
-        mContent.setClipToPadding(!mIsBackProgressing);
+    protected void onUserSwipeToDismissProgressChanged() {
+        float progress = mSwipeToDismissProgress.value;
+        mIsDismissInProgress = progress > 0f;
+
+        float scale = PREDICTIVE_BACK_MIN_SCALE + (1 - PREDICTIVE_BACK_MIN_SCALE) * (1f - progress);
+        SCALE_PROPERTY.set(this, scale);
+        setClipChildren(!mIsDismissInProgress);
+        setClipToPadding(!mIsDismissInProgress);
+        mContent.setClipChildren(!mIsDismissInProgress);
+        mContent.setClipToPadding(!mIsDismissInProgress);
         invalidate();
     }
 
     @Override
     public void onBackCancelled() {
         super.onBackCancelled();
-        animateSlideInViewToNoScale();
+        animateSwipeToDismissProgressToStart();
     }
 
-    protected void animateSlideInViewToNoScale() {
-        mSlideInViewScale.animateToValue(1f)
+    protected void animateSwipeToDismissProgressToStart() {
+        mSwipeToDismissProgress.animateToValue(0f)
                 .setDuration(REVERT_SWIPE_ALL_APPS_TO_HOME_ANIMATION_DURATION_MS)
                 .start();
     }
@@ -340,7 +344,7 @@ public abstract class AbstractSlideInView<T extends Context & ActivityContext>
                 mContentBackgroundParentView.getTop() + (int) mContent.getTranslationY(),
                 mContentBackgroundParentView.getRight(),
                 mContentBackgroundParentView.getBottom()
-                        + (mIsBackProgressing ? getBottomOffsetPx() : 0));
+                        + (mIsDismissInProgress ? getBottomOffsetPx() : 0));
         mContentBackground.draw(canvas);
     }
 

src/com/android/launcher3/views/WidgetsEduView.java

@@ -70,9 +70,9 @@ public class WidgetsEduView extends AbstractSlideInView<BaseActivity> implements
     }
 
     @Override
-    protected void onScaleProgressChanged() {
-        super.onScaleProgressChanged();
-        setTranslationY(getMeasuredHeight() * (1 - mSlideInViewScale.value) / 2);
+    protected void onUserSwipeToDismissProgressChanged() {
+        super.onUserSwipeToDismissProgressChanged();
+        setTranslationY(getMeasuredHeight() * (mSwipeToDismissProgress.value / 2));
     }
 
     private void show() {

src/com/android/launcher3/widget/WidgetsBottomSheet.java

@@ -280,6 +280,6 @@ public class WidgetsBottomSheet extends BaseWidgetSheet {
     @Override
     public void addHintCloseAnim(
             float distanceToMove, Interpolator interpolator, PendingAnimation target) {
-        target.setInt(this, PADDING_BOTTOM, (int) (distanceToMove + mInsets.bottom), interpolator);
+        target.addAnimatedFloat(mSwipeToDismissProgress, 0f, 1f, interpolator);
     }
 }

src/com/android/launcher3/widget/picker/WidgetsFullSheet.java

@@ -17,7 +17,6 @@ package com.android.launcher3.widget.picker;
 
 import static com.android.launcher3.Flags.enableCategorizedWidgetSuggestions;
 import static com.android.launcher3.Flags.enableUnfoldedTwoPanePicker;
-import static com.android.launcher3.LauncherAnimUtils.VIEW_TRANSLATE_Y;
 import static com.android.launcher3.LauncherPrefs.WIDGETS_EDUCATION_DIALOG_SEEN;
 import static com.android.launcher3.allapps.ActivityAllAppsContainerView.AdapterHolder.SEARCH;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_WIDGETSTRAY_SEARCHED;
@@ -814,8 +813,7 @@ public class WidgetsFullSheet extends BaseWidgetSheet
     @Override
     public void addHintCloseAnim(
             float distanceToMove, Interpolator interpolator, PendingAnimation target) {
-        target.setFloat(getRecyclerView(), VIEW_TRANSLATE_Y, -distanceToMove, interpolator);
-        target.setViewAlpha(getRecyclerView(), 0.5f, interpolator);
+        target.addAnimatedFloat(mSwipeToDismissProgress, 0f, 1f, interpolator);
     }
 
     @Override
@@ -911,7 +909,7 @@ public class WidgetsFullSheet extends BaseWidgetSheet
     public void onBackInvoked() {
         if (mIsInSearchMode) {
             mSearchBar.reset();
-            animateSlideInViewToNoScale();
+            animateSwipeToDismissProgressToStart();
         } else {
             super.onBackInvoked();
         }

src/com/android/launcher3/widget/picker/WidgetsTwoPaneSheet.java

@@ -74,7 +74,7 @@ public class WidgetsTwoPaneSheet extends WidgetsFullSheet {
     private ScrollView mRightPaneScrollView;
     private WidgetsListTableViewHolderBinder mWidgetsListTableViewHolderBinder;
 
-    private boolean mOldIsBackSwipeProgressing;
+    private boolean mOldIsSwipeToDismissInProgress;
     private int mActivePage = -1;
     private PackageUserKey mSelectedHeader;
 
@@ -154,14 +154,14 @@ public class WidgetsTwoPaneSheet extends WidgetsFullSheet {
     }
 
     @Override
-    protected void onScaleProgressChanged() {
-        super.onScaleProgressChanged();
-        boolean isBackSwipeProgressing = mSlideInViewScale.value > 0;
-        if (isBackSwipeProgressing == mOldIsBackSwipeProgressing) {
+    protected void onUserSwipeToDismissProgressChanged() {
+        super.onUserSwipeToDismissProgressChanged();
+        boolean isSwipeToDismissInProgress = mSwipeToDismissProgress.value > 0;
+        if (isSwipeToDismissInProgress == mOldIsSwipeToDismissInProgress) {
             return;
         }
-        mOldIsBackSwipeProgressing = isBackSwipeProgressing;
-        if (isBackSwipeProgressing) {
+        mOldIsSwipeToDismissInProgress = isSwipeToDismissInProgress;
+        if (isSwipeToDismissInProgress) {
             modifyAttributesOnViewTree(mPrimaryWidgetListView, (ViewParent) mContent,
                     CLIP_CHILDREN_FALSE_MODIFIER);
             modifyAttributesOnViewTree(mRightPaneScrollView,  (ViewParent) mContent,