Hide hotseat when bubble bar is expanded.

Added logic to stash the hotseat when on launcher home screen.

Bug: 280494203
Test: Manual:
http://recall/-/gx8ASgewUeUS3QYohfrd1J/fjfjUw296LRXUm9uYqXU4K
all tests in com.android.launcher3.taskbar
Flag: com.android.wm.shell.enable_bubble_bar

Change-Id: I67b298831eaed9c549a2fae7dc5a0d9fae51f7c4
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index c29e60e..59bf8d5 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -158,6 +158,11 @@
                 shouldDelayLauncherStateAnim);
     }
 
+    @Override
+    public void stashHotseat(boolean stash) {
+        mTaskbarLauncherStateController.stashHotseat(stash);
+    }
+
     /**
      * Adds the Launcher resume animator to the given animator set.
      *
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
index ab3b44e..84c834b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
@@ -17,9 +17,12 @@
 
 import static com.android.app.animation.Interpolators.EMPHASIZED;
 import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_TASKBAR_ALIGNMENT;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_TASKBAR_STASH;
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_APP;
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_OVERVIEW;
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_STASHED_LAUNCHER_STATE;
+import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_FOR_BUBBLES;
 import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_HOME;
 import static com.android.launcher3.util.FlagDebugUtils.appendFlag;
 import static com.android.launcher3.util.FlagDebugUtils.formatFlagChange;
@@ -41,6 +44,7 @@
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Hotseat.HotseatQsbAlphaId;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.Utilities;
@@ -145,7 +149,7 @@
     private AnimatedFloat mTaskbarBackgroundAlpha;
     private AnimatedFloat mTaskbarAlpha;
     private AnimatedFloat mTaskbarCornerRoundness;
-    private MultiProperty mIconAlphaForHome;
+    private MultiProperty mTaskbarAlphaForHome;
     private QuickstepLauncher mLauncher;
 
     private boolean mIsDestroyed = false;
@@ -175,11 +179,11 @@
                     if (mIsQsbInline && !dp.isQsbInline) {
                         // We only modify QSB alpha if isQsbInline = true. If we switch to a DP
                         // where isQsbInline = false, then we need to reset the alpha.
-                        mLauncher.getHotseat().setQsbAlpha(1f);
+                        mLauncher.getHotseat().setQsbAlpha(1f, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                     }
                     mIsQsbInline = dp.isQsbInline;
                     TaskbarLauncherStateController.this.updateIconAlphaForHome(
-                            mIconAlphaForHome.getValue());
+                            mTaskbarAlphaForHome.getValue(), ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                 }
             };
 
@@ -242,7 +246,7 @@
                 .getTaskbarBackgroundAlpha();
         mTaskbarAlpha = mControllers.taskbarDragLayerController.getTaskbarAlpha();
         mTaskbarCornerRoundness = mControllers.getTaskbarCornerRoundness();
-        mIconAlphaForHome = mControllers.taskbarViewController
+        mTaskbarAlphaForHome = mControllers.taskbarViewController
                 .getTaskbarIconAlpha().get(ALPHA_INDEX_HOME);
 
         resetIconAlignment();
@@ -266,7 +270,7 @@
 
         mIconAlignment.finishAnimation();
 
-        mLauncher.getHotseat().setIconsAlpha(1f);
+        mLauncher.getHotseat().setIconsAlpha(1f, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
         mLauncher.getStateManager().removeStateListener(mStateListener);
 
         mCanSyncViews = !mControllers.taskbarActivityContext.isPhoneMode();
@@ -701,14 +705,17 @@
                 public void onAnimationEnd(Animator animation) {
                     if (isInStashedState && committed) {
                         // Reset hotseat alpha to default
-                        mLauncher.getHotseat().setIconsAlpha(1);
+                        mLauncher.getHotseat().setIconsAlpha(1, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                     }
                 }
 
                 @Override
                 public void onAnimationStart(Animator animation) {
-                    if (mLauncher.getHotseat().getIconsAlpha() > 0) {
-                        updateIconAlphaForHome(mLauncher.getHotseat().getIconsAlpha());
+                    float hotseatIconsAlpha = mLauncher.getHotseat()
+                            .getIconsAlpha(ALPHA_CHANNEL_TASKBAR_ALIGNMENT)
+                            .getValue();
+                    if (hotseatIconsAlpha > 0) {
+                        updateIconAlphaForHome(hotseatIconsAlpha, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                     }
                 }
             });
@@ -737,6 +744,25 @@
         }
     }
 
+    protected void stashHotseat(boolean stash) {
+        TaskbarStashController stashController = mControllers.taskbarStashController;
+        stashController.updateStateForFlag(FLAG_STASHED_FOR_BUBBLES, stash);
+        Runnable swapHotseatWithTaskbar = new Runnable() {
+            @Override
+            public void run() {
+                updateIconAlphaForHome(stash ? 1 : 0, ALPHA_CHANNEL_TASKBAR_STASH);
+            }
+        };
+        if (stash) {
+            stashController.applyState();
+            // if we stashing the hotseat we need to immediately swap it with the animating taskbar
+            swapHotseatWithTaskbar.run();
+        } else {
+            // if we revert stashing make swap after taskbar animation is complete
+            stashController.applyState(/* postApplyAction = */ swapHotseatWithTaskbar);
+        }
+    }
+
     /**
      * Resets and updates the icon alignment.
      */
@@ -746,7 +772,7 @@
     }
 
     private void onIconAlignmentRatioChanged() {
-        float currentValue = mIconAlphaForHome.getValue();
+        float currentValue = mTaskbarAlphaForHome.getValue();
         boolean taskbarWillBeVisible = mIconAlignment.value < 1;
         boolean firstFrameVisChanged = (taskbarWillBeVisible && Float.compare(currentValue, 1) != 0)
                 || (!taskbarWillBeVisible && Float.compare(currentValue, 0) != 0);
@@ -754,8 +780,10 @@
         mControllers.taskbarViewController.setLauncherIconAlignment(
                 mIconAlignment.value, mLauncher.getDeviceProfile());
         mControllers.navbarButtonsViewController.updateTaskbarAlignment(mIconAlignment.value);
-        // Switch taskbar and hotseat in last frame
-        updateIconAlphaForHome(taskbarWillBeVisible ? 1 : 0);
+        // Switch taskbar and hotseat in last frame and if taskbar is not hidden for bubbles
+        boolean isHiddenForBubbles = mControllers.taskbarStashController.isHiddenForBubbles();
+        updateIconAlphaForHome(taskbarWillBeVisible ? 1 : 0, ALPHA_CHANNEL_TASKBAR_ALIGNMENT,
+                /* updateTaskbarAlpha = */ !isHiddenForBubbles);
 
         // Sync the first frame where we swap taskbar and hotseat.
         if (firstFrameVisChanged && mCanSyncViews && !Utilities.isRunningInTestHarness()) {
@@ -765,12 +793,20 @@
         }
     }
 
-    private void updateIconAlphaForHome(float alpha) {
+    private void updateIconAlphaForHome(float taskbarAlpha, @HotseatQsbAlphaId int alphaChannel) {
+        updateIconAlphaForHome(taskbarAlpha, alphaChannel, /* updateTaskbarAlpha = */ true);
+    }
+
+    private void updateIconAlphaForHome(float taskbarAlpha,
+            @HotseatQsbAlphaId int alphaChannel,
+            boolean updateTaskbarAlpha) {
         if (mIsDestroyed) {
             return;
         }
-        mIconAlphaForHome.setValue(alpha);
-        boolean hotseatVisible = alpha == 0
+        if (updateTaskbarAlpha) {
+            mTaskbarAlphaForHome.setValue(taskbarAlpha);
+        }
+        boolean hotseatVisible = taskbarAlpha == 0
                 || mControllers.taskbarActivityContext.isPhoneMode()
                 || (!mControllers.uiController.isHotseatIconOnTopWhenAligned()
                 && mIconAlignment.value > 0);
@@ -778,9 +814,10 @@
          * Hide Launcher Hotseat icons when Taskbar icons have opacity. Both icon sets
          * should not be visible at the same time.
          */
-        mLauncher.getHotseat().setIconsAlpha(hotseatVisible ? 1 : 0);
+        float targetAlpha = hotseatVisible ? 1 : 0;
+        mLauncher.getHotseat().setIconsAlpha(targetAlpha, alphaChannel);
         if (mIsQsbInline) {
-            mLauncher.getHotseat().setQsbAlpha(hotseatVisible ? 1 : 0);
+            mLauncher.getHotseat().setQsbAlpha(targetAlpha, alphaChannel);
         }
     }
 
@@ -868,7 +905,7 @@
         pw.println(String.format(
                 "%s\tmTaskbarBackgroundAlpha=%.2f", prefix, mTaskbarBackgroundAlpha.value));
         pw.println(String.format(
-                "%s\tmIconAlphaForHome=%.2f", prefix, mIconAlphaForHome.getValue()));
+                "%s\tmTaskbarAlphaForHome=%.2f", prefix, mTaskbarAlphaForHome.getValue()));
         pw.println(String.format("%s\tmPrevState=%s", prefix,
                 mPrevState == null ? null : getStateString(mPrevState)));
         pw.println(String.format("%s\tmState=%s", prefix, getStateString(mState)));
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
index 2370dfd..751a42a 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
@@ -115,7 +115,8 @@
         return bubblesExpanded && !mControllers.navbarButtonsViewController.isImeVisible()
                 && !isShadeVisible
                 && !mControllers.taskbarStashController.isStashed()
-                && (mTaskbarVisible || showScrimForBubbles);
+                && (mTaskbarVisible || showScrimForBubbles)
+                && !mControllers.taskbarStashController.isHiddenForBubbles();
     }
 
     private float getScrimAlpha() {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index 2c2f65d..1f7b44f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -101,6 +101,7 @@
     public static final int FLAG_IN_OVERVIEW = 1 << 11; // launcher is in overview
     // An internal no-op flag to determine whether we should delay the taskbar background animation
     private static final int FLAG_DELAY_TASKBAR_BG_TAG = 1 << 12;
+    public static final int FLAG_STASHED_FOR_BUBBLES = 1 << 13; // show handle for stashed hotseat
 
     // If any of these flags are enabled, isInApp should return true.
     private static final int FLAGS_IN_APP = FLAG_IN_APP | FLAG_IN_SETUP;
@@ -122,7 +123,8 @@
 
     // If any of these flags are enabled, the taskbar must be stashed.
     private static final int FLAGS_FORCE_STASHED = FLAG_STASHED_SYSUI | FLAG_STASHED_DEVICE_LOCKED
-            | FLAG_STASHED_IN_TASKBAR_ALL_APPS | FLAG_STASHED_SMALL_SCREEN;
+            | FLAG_STASHED_IN_TASKBAR_ALL_APPS | FLAG_STASHED_SMALL_SCREEN
+            | FLAG_STASHED_FOR_BUBBLES;
 
     /**
      * How long to stash/unstash when manually invoked via long press.
@@ -395,6 +397,11 @@
         return mIsStashed;
     }
 
+    /** Sets the hotseat stashed. */
+    public void stashHotseat(boolean stash) {
+        mControllers.uiController.stashHotseat(stash);
+    }
+
     /**
      * Returns whether the taskbar should be stashed in apps (e.g. user long pressed to stash).
      */
@@ -434,6 +441,11 @@
         return hasAnyFlag(FLAG_IN_OVERVIEW);
     }
 
+    /** Returns whether taskbar is hidden for bubbles. */
+    public boolean isHiddenForBubbles() {
+        return hasAnyFlag(FLAG_STASHED_FOR_BUBBLES);
+    }
+
     /**
      * Returns the height that taskbar will be touchable.
      */
@@ -995,13 +1007,29 @@
     }
 
     public void applyState() {
-        applyState(hasAnyFlag(FLAG_IN_SETUP) ? 0 : TASKBAR_STASH_DURATION);
+        applyState(/* postApplyAction = */ null);
+    }
+
+    /** Applies state and performs action after state is applied. */
+    public void applyState(@Nullable Runnable postApplyAction) {
+        applyState(hasAnyFlag(FLAG_IN_SETUP) ? 0 : TASKBAR_STASH_DURATION, postApplyAction);
     }
 
     public void applyState(long duration) {
+        applyState(duration, /* postApplyAction = */ null);
+    }
+
+    private void applyState(long duration, @Nullable Runnable postApplyAction) {
         Animator animator = createApplyStateAnimator(duration);
         if (animator != null) {
+            if (postApplyAction != null) {
+                // performs action on animation end
+                animator.addListener(AnimatorListeners.forEndCallback(postApplyAction));
+            }
             animator.start();
+        } else if (postApplyAction != null) {
+            // animator was not created, just execute the action
+            postApplyAction.run();
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index 6b1173a..c047216 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -428,4 +428,8 @@
     public void setSkipLauncherVisibilityChange(boolean skip) {
         mSkipLauncherVisibilityChange = skip;
     }
+
+    /** Sets whether the hotseat is stashed */
+    public void stashHotseat(boolean stash) {
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
index ed08de5..4176292 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
@@ -440,7 +440,7 @@
             if (hidden) {
                 mBarView.setAlpha(0);
                 mBarView.setExpanded(false);
-                updatePersistentTaskbar(/* isBubbleBarExpanded = */ false);
+                adjustTaskbarAndHotseatToBubbleBarState(/* isBubbleBarExpanded = */ false);
             }
             mActivity.bubbleBarVisibilityChanged(!hidden);
         }
@@ -735,7 +735,7 @@
     public void setExpanded(boolean isExpanded) {
         if (isExpanded != mBarView.isExpanded()) {
             mBarView.setExpanded(isExpanded);
-            updatePersistentTaskbar(isExpanded);
+            adjustTaskbarAndHotseatToBubbleBarState(isExpanded);
             if (!isExpanded) {
                 mSystemUiProxy.collapseBubbles();
             } else {
@@ -746,13 +746,20 @@
         }
     }
 
-    private void updatePersistentTaskbar(boolean isBubbleBarExpanded) {
-        if (mBubbleStashController.isTransientTaskBar()) return;
-        boolean hideTaskbar = isBubbleBarExpanded && isIntersectingTaskbar();
-        mTaskbarViewPropertiesProvider
-                .getIconsAlpha()
-                .animateToValue(hideTaskbar ? 0 : 1)
-                .start();
+    /**
+     * Hides the persistent taskbar if it is going to intersect with the expanded bubble bar if in
+     * app or overview. Set the hotseat stashed state if on launcher home screen.
+     */
+    private void adjustTaskbarAndHotseatToBubbleBarState(boolean isBubbleBarExpanded) {
+        if (mBubbleStashController.isBubblesShowingOnHome()) {
+            mTaskbarStashController.stashHotseat(isBubbleBarExpanded);
+        } else if (!mBubbleStashController.isTransientTaskBar()) {
+            boolean hideTaskbar = isBubbleBarExpanded && isIntersectingTaskbar();
+            mTaskbarViewPropertiesProvider
+                    .getIconsAlpha()
+                    .animateToValue(hideTaskbar ? 0 : 1)
+                    .start();
+        }
     }
 
     /** Return {@code true} if expanded bubble bar would intersect the taskbar. */
@@ -871,6 +878,11 @@
         mBoundsChangeListener = listener;
     }
 
+    /** Called when the controller is destroyed. */
+    public void onDestroy() {
+        adjustTaskbarAndHotseatToBubbleBarState(/*isBubbleBarExpanded = */false);
+    }
+
     /**
      * Create an animator for showing or hiding bubbles when stashed state changes
      *
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java
index e00916a..293a3e4 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java
@@ -124,6 +124,7 @@
     public void onDestroy() {
         bubbleStashedHandleViewController.ifPresent(BubbleStashedHandleViewController::onDestroy);
         bubbleBarController.onDestroy();
+        bubbleBarViewController.onDestroy();
     }
 
     /** Dumps bubble controllers state. */
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index 0d4ebe0..024dde4 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -33,15 +33,34 @@
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
+import androidx.annotation.IntDef;
+
 import com.android.launcher3.util.HorizontalInsettableView;
+import com.android.launcher3.util.MultiPropertyFactory.MultiProperty;
 import com.android.launcher3.util.MultiTranslateDelegate;
+import com.android.launcher3.util.MultiValueAlpha;
 import com.android.launcher3.views.ActivityContext;
 
+import java.io.PrintWriter;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * View class that represents the bottom row of the home screen.
  */
 public class Hotseat extends CellLayout implements Insettable {
 
+    public static final int ALPHA_CHANNEL_TASKBAR_ALIGNMENT = 0;
+    public static final int ALPHA_CHANNEL_PREVIEW_RENDERER = 1;
+    public static final int ALPHA_CHANNEL_TASKBAR_STASH = 2;
+    public static final int ALPHA_CHANNEL_CHANNELS_COUNT = 3;
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @IntDef({ALPHA_CHANNEL_TASKBAR_ALIGNMENT, ALPHA_CHANNEL_PREVIEW_RENDERER,
+            ALPHA_CHANNEL_TASKBAR_STASH})
+    public @interface HotseatQsbAlphaId {
+    }
+
     // Ratio of empty space, qsb should take up to appear visually centered.
     public static final float QSB_CENTER_FACTOR = .325f;
     private static final int BUBBLE_BAR_ADJUSTMENT_ANIMATION_DURATION_MS = 250;
@@ -50,6 +69,8 @@
     private boolean mHasVerticalHotseat;
     private Workspace<?> mWorkspace;
     private boolean mSendTouchToWorkspace;
+    private final MultiValueAlpha mIconsAlphaChannels;
+    private final MultiValueAlpha mQsbAlphaChannels;
 
     private final View mQsb;
 
@@ -63,9 +84,11 @@
 
     public Hotseat(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
-
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
         addView(mQsb);
+        mIconsAlphaChannels = new MultiValueAlpha(getShortcutsAndWidgets(),
+                ALPHA_CHANNEL_CHANNELS_COUNT);
+        mQsbAlphaChannels = new MultiValueAlpha(mQsb, ALPHA_CHANNEL_CHANNELS_COUNT);
     }
 
     /**
@@ -270,21 +293,27 @@
     }
 
     /**
-     * Sets the alpha value of just our ShortcutAndWidgetContainer.
+     * Sets the alpha value of the specified alpha channel of just our ShortcutAndWidgetContainer.
      */
-    public void setIconsAlpha(float alpha) {
-        getShortcutsAndWidgets().setAlpha(alpha);
+    public void setIconsAlpha(float alpha, @HotseatQsbAlphaId int channelId) {
+        getIconsAlpha(channelId).setValue(alpha);
     }
 
     /**
      * Sets the alpha value of just our QSB.
      */
-    public void setQsbAlpha(float alpha) {
-        mQsb.setAlpha(alpha);
+    public void setQsbAlpha(float alpha, @HotseatQsbAlphaId int channelId) {
+        getQsbAlpha(channelId).setValue(alpha);
     }
 
-    public float getIconsAlpha() {
-        return getShortcutsAndWidgets().getAlpha();
+    /** Returns the alpha channel for ShortcutAndWidgetContainer */
+    public MultiProperty getIconsAlpha(@HotseatQsbAlphaId int channelId) {
+        return mIconsAlphaChannels.get(channelId);
+    }
+
+    /** Returns the alpha channel for Qsb */
+    public MultiProperty getQsbAlpha(@HotseatQsbAlphaId int channelId) {
+        return mQsbAlphaChannels.get(channelId);
     }
 
     /**
@@ -294,4 +323,24 @@
         return mQsb;
     }
 
+    /** Dumps the Hotseat internal state */
+    public void dump(String prefix, PrintWriter writer) {
+        writer.println(prefix + "Hotseat:");
+        mIconsAlphaChannels.dump(
+                prefix + "\t",
+                writer,
+                "mIconsAlphaChannels",
+                "ALPHA_CHANNEL_TASKBAR_ALIGNMENT",
+                "ALPHA_CHANNEL_PREVIEW_RENDERER",
+                "ALPHA_CHANNEL_TASKBAR_STASH");
+        mQsbAlphaChannels.dump(
+                prefix + "\t",
+                writer,
+                "mQsbAlphaChannels",
+                "ALPHA_CHANNEL_TASKBAR_ALIGNMENT",
+                "ALPHA_CHANNEL_PREVIEW_RENDERER",
+                "ALPHA_CHANNEL_TASKBAR_STASH"
+        );
+    }
+
 }
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 365e3d4..fa7f564 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2678,6 +2678,7 @@
             }
 
             writer.println(prefix + "  Hotseat");
+            mHotseat.dump(prefix, writer);
             ViewGroup layout = mHotseat.getShortcutsAndWidgets();
             for (int j = 0; j < layout.getChildCount(); j++) {
                 Object tag = layout.getChildAt(j).getTag();
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index 2408955..4af9e2f 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -23,6 +23,7 @@
 import static com.android.launcher3.BubbleTextView.DISPLAY_TASKBAR;
 import static com.android.launcher3.BubbleTextView.DISPLAY_WORKSPACE;
 import static com.android.launcher3.DeviceProfile.DEFAULT_SCALE;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_PREVIEW_RENDERER;
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION;
 import static com.android.launcher3.Utilities.SHOULD_SHOW_FIRST_PAGE_WIDGET;
 import static com.android.launcher3.model.ModelUtils.filterCurrentWorkspaceItems;
@@ -320,12 +321,12 @@
         mUiHandler.post(() -> {
             if (mDp.isTaskbarPresent) {
                 // hotseat icons on bottom
-                mHotseat.setIconsAlpha(hide ? 0 : 1);
+                mHotseat.setIconsAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
                 if (mDp.isQsbInline) {
-                    mHotseat.setQsbAlpha(hide ? 0 : 1);
+                    mHotseat.setQsbAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
                 }
             } else {
-                mHotseat.setQsbAlpha(hide ? 0 : 1);
+                mHotseat.setQsbAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
             }
         });
     }