Animate inline QSB between home and apps

- Added a QSB to taskbar to be animated between inline QSB and taskbar
- Passed endValue of taskbar animator to TaskbarController to have aniamtion variation between home -> app and app -> home
- Tuned duartion of taskbar animation and also stagger animation when taskbar is present
- Disabled scaling down of taskbar and inline QSB for home -> app
- Disabled stagger animation of taskbar and inline QSB for app -> home

Bug: 220733187
Test: manual
Change-Id: I4aac0bbc343b992a0472298595770e2bf2a55990
diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index e1a3b72..b20752d 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -31,7 +31,6 @@
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.Utilities.mapBoundToRange;
-import static com.android.launcher3.Utilities.postAsyncCallback;
 import static com.android.launcher3.anim.Interpolators.ACCEL_1_5;
 import static com.android.launcher3.anim.Interpolators.AGGRESSIVE_EASE;
 import static com.android.launcher3.anim.Interpolators.DEACCEL_1_5;
@@ -184,6 +183,10 @@
     public static final int SPLIT_DIVIDER_ANIM_DURATION = 100;
 
     public static final int CONTENT_ALPHA_DURATION = 217;
+    public static final int TASKBAR_TO_APP_DURATION = 600;
+    // TODO(b/236145847): Tune TASKBAR_TO_HOME_DURATION to 383 after conflict with unlock animation
+    // is solved.
+    public static final int TASKBAR_TO_HOME_DURATION = 300;
     protected static final int CONTENT_SCALE_DURATION = 350;
     protected static final int CONTENT_SCRIM_DURATION = 350;
 
@@ -527,7 +530,15 @@
             workspace.forEachVisiblePage(
                     view -> viewsToAnimate.add(((CellLayout) view).getShortcutsAndWidgets()));
 
-            viewsToAnimate.add(mLauncher.getHotseat());
+            // Do not scale hotseat as a whole when taskbar is present, and scale QSB only if it's
+            // not inline.
+            if (mDeviceProfile.isTaskbarPresent) {
+                if (!mDeviceProfile.isQsbInline) {
+                    viewsToAnimate.add(mLauncher.getHotseat().getQsb());
+                }
+            } else {
+                viewsToAnimate.add(mLauncher.getHotseat());
+            }
 
             viewsToAnimate.forEach(view -> {
                 view.setLayerType(View.LAYER_TYPE_HARDWARE, null);
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index ca30e72..6df31e5 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -171,7 +171,9 @@
                 isResumed,
                 fromInit,
                 /* startAnimation= */ true,
-                QuickstepTransitionManager.CONTENT_ALPHA_DURATION);
+                !isResumed
+                        ? QuickstepTransitionManager.TASKBAR_TO_APP_DURATION
+                        : QuickstepTransitionManager.TASKBAR_TO_HOME_DURATION);
     }
 
     @Nullable
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
index dc0ef27..591b32f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
@@ -19,11 +19,13 @@
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_STASHED_LAUNCHER_STATE;
 import static com.android.launcher3.taskbar.TaskbarStashController.TASKBAR_STASH_DURATION;
 import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_HOME;
+import static com.android.systemui.animation.Interpolators.EMPHASIZED;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
+import android.util.Log;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -31,6 +33,7 @@
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BaseQuickstepLauncher;
 import com.android.launcher3.LauncherState;
+import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.statemanager.StateManager;
 import com.android.launcher3.util.MultiValueAlpha;
@@ -44,7 +47,6 @@
 import java.io.PrintWriter;
 import java.util.HashMap;
 import java.util.StringJoiner;
-import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 /**
@@ -53,6 +55,9 @@
  */
  public class TaskbarLauncherStateController {
 
+    private static final String TAG = TaskbarLauncherStateController.class.getSimpleName();
+    private static final boolean DEBUG = false;
+
     public static final int FLAG_RESUMED = 1 << 0;
     public static final int FLAG_RECENTS_ANIMATION_RUNNING = 1 << 1;
     public static final int FLAG_TRANSITION_STATE_RUNNING = 1 << 2;
@@ -99,7 +104,11 @@
                     }
                     updateStateForFlag(FLAG_TRANSITION_STATE_RUNNING, true);
                     if (!mShouldDelayLauncherStateAnim) {
-                        applyState();
+                        if (toState == LauncherState.NORMAL) {
+                            applyState(QuickstepTransitionManager.TASKBAR_TO_HOME_DURATION);
+                        } else {
+                            applyState();
+                        }
                     }
                 }
 
@@ -122,7 +131,12 @@
         MultiValueAlpha taskbarIconAlpha = mControllers.taskbarViewController.getTaskbarIconAlpha();
         mIconAlphaForHome = taskbarIconAlpha.getProperty(ALPHA_INDEX_HOME);
         mIconAlphaForHome.setConsumer(
-                (Consumer<Float>) alpha -> mLauncher.getHotseat().setIconsAlpha(alpha > 0 ? 0 : 1));
+                alpha -> {
+                    mLauncher.getHotseat().setIconsAlpha(alpha > 0 ? 0 : 1);
+                    if (mLauncher.getDeviceProfile().isQsbInline) {
+                        mLauncher.getHotseat().setQsbAlpha(alpha > 0 ? 0 : 1);
+                    }
+                });
 
         mIconAlignmentForResumedState.finishAnimation();
         onIconAlignmentRatioChangedForAppAndHomeTransition();
@@ -269,6 +283,11 @@
                 ObjectAnimator resumeAlignAnim = mIconAlignmentForResumedState
                         .animateToValue(toAlignmentForResumedState)
                         .setDuration(duration);
+                if (DEBUG) {
+                    Log.d(TAG, "mIconAlignmentForResumedState - "
+                            + mIconAlignmentForResumedState.value
+                            + " -> " + toAlignmentForResumedState + ": " + duration);
+                }
 
                 resumeAlignAnim.addListener(new AnimatorListenerAdapter() {
                     @Override
@@ -305,6 +324,11 @@
                 if (isRecentsAnimationRunning) {
                     gestureAlignAnim.setDuration(duration);
                 }
+                if (DEBUG) {
+                    Log.d(TAG, "mIconAlignmentForGestureState - "
+                            + mIconAlignmentForGestureState.value
+                            + " -> " + toAlignmentForGestureState + ": " + duration);
+                }
                 gestureAlignAnim.addListener(new AnimatorListenerAdapter() {
                     @Override
                     public void onAnimationEnd(Animator animation) {
@@ -330,6 +354,7 @@
                     .setDuration(duration));
         }
 
+        animatorSet.setInterpolator(EMPHASIZED);
         if (start) {
             animatorSet.start();
         }
@@ -374,6 +399,12 @@
             mIconAlignmentForLauncherState.finishAnimation();
             animatorSet.play(mIconAlignmentForLauncherState.animateToValue(toAlignment)
                     .setDuration(duration));
+            if (DEBUG) {
+                Log.d(TAG, "mIconAlignmentForLauncherState - "
+                        + mIconAlignmentForLauncherState.value
+                        + " -> " + toAlignment + ": " + duration);
+            }
+            animatorSet.setInterpolator(EMPHASIZED);
         }
     }
 
@@ -396,17 +427,17 @@
         onIconAlignmentRatioChanged(this::getCurrentIconAlignmentRatioBetweenAppAndHome);
     }
 
-    private void onIconAlignmentRatioChanged(Supplier<Float> alignmentSupplier) {
+    private void onIconAlignmentRatioChanged(Supplier<AnimatedFloat> alignmentSupplier) {
         if (mControllers == null) {
             return;
         }
-        float alignment = alignmentSupplier.get();
+        AnimatedFloat animatedFloat = alignmentSupplier.get();
         float currentValue = mIconAlphaForHome.getValue();
-        boolean taskbarWillBeVisible = alignment < 1;
+        boolean taskbarWillBeVisible = animatedFloat.value < 1;
         boolean firstFrameVisChanged = (taskbarWillBeVisible && Float.compare(currentValue, 1) != 0)
                 || (!taskbarWillBeVisible && Float.compare(currentValue, 0) != 0);
 
-        updateIconAlignment(alignment);
+        updateIconAlignment(animatedFloat.value, animatedFloat.getEndValue());
 
         // Sync the first frame where we swap taskbar and hotseat.
         if (firstFrameVisChanged && mCanSyncViews && !Utilities.IS_RUNNING_IN_TEST_HARNESS) {
@@ -416,21 +447,22 @@
         }
     }
 
-    private void updateIconAlignment(float alignment) {
+    private void updateIconAlignment(float alignment, Float endAlignment) {
         mControllers.taskbarViewController.setLauncherIconAlignment(
-                alignment, mLauncher.getDeviceProfile());
+                alignment, endAlignment, mLauncher.getDeviceProfile());
 
         // Switch taskbar and hotseat in last frame
         setTaskbarViewVisible(alignment < 1);
         mControllers.navbarButtonsViewController.updateTaskbarAlignment(alignment);
     }
 
-    private float getCurrentIconAlignmentRatioBetweenAppAndHome() {
-        return Math.max(mIconAlignmentForResumedState.value, mIconAlignmentForGestureState.value);
+    private AnimatedFloat getCurrentIconAlignmentRatioBetweenAppAndHome() {
+        return mIconAlignmentForResumedState.value > mIconAlignmentForGestureState.value
+                ? mIconAlignmentForResumedState : mIconAlignmentForGestureState;
     }
 
-    private float getCurrentIconAlignmentRatioForLauncherState() {
-        return mIconAlignmentForLauncherState.value;
+    private AnimatedFloat getCurrentIconAlignmentRatioForLauncherState() {
+        return mIconAlignmentForLauncherState;
     }
 
     private void setTaskbarViewVisible(boolean isVisible) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 6f88d64..6a43cc5 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -20,6 +20,7 @@
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
@@ -31,6 +32,7 @@
 import androidx.core.graphics.ColorUtils;
 
 import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
@@ -78,6 +80,8 @@
     // Only non-null when device supports having an All Apps button.
     private @Nullable AllAppsButton mAllAppsButton;
 
+    private View mQsb;
+
     public TaskbarView(@NonNull Context context) {
         this(context, null);
     }
@@ -117,6 +121,9 @@
                     new ViewGroup.LayoutParams(mIconTouchSize, mIconTouchSize));
             mAllAppsButton.setPadding(mItemPadding, mItemPadding, mItemPadding, mItemPadding);
         }
+
+        // TODO: Disable touch events on QSB otherwise it can crash.
+        mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
     }
 
     private int getColorWithGivenLuminance(int color, float luminance) {
@@ -166,6 +173,7 @@
         if (mAllAppsButton != null) {
             removeView(mAllAppsButton);
         }
+        removeView(mQsb);
 
         for (int i = 0; i < hotseatItemInfos.length; i++) {
             ItemInfo hotseatItemInfo = hotseatItemInfos[i];
@@ -242,6 +250,11 @@
             int index = Utilities.isRtl(getResources()) ? 0 : getChildCount();
             addView(mAllAppsButton, index);
         }
+        if (mActivityContext.getDeviceProfile().isQsbInline) {
+            addView(mQsb, Utilities.isRtl(getResources()) ? getChildCount() : 0);
+            // Always set QSB to invisible after re-adding.
+            mQsb.setVisibility(View.INVISIBLE);
+        }
 
         mThemeIconsBackground = calculateThemeIconsBackground();
         setThemedIconsBackgroundColor(mThemeIconsBackground);
@@ -273,7 +286,12 @@
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         int count = getChildCount();
-        int spaceNeeded = count * (mItemMarginLeftRight * 2 + mIconTouchSize);
+        int countExcludingQsb = count;
+        DeviceProfile deviceProfile = mActivityContext.getDeviceProfile();
+        if (deviceProfile.isQsbInline) {
+            countExcludingQsb--;
+        }
+        int spaceNeeded = countExcludingQsb * (mItemMarginLeftRight * 2 + mIconTouchSize);
         int navSpaceNeeded = ApiWrapper.getHotseatEndOffset(getContext());
         boolean layoutRtl = isLayoutRtl();
         int iconEnd = right - (right - left - spaceNeeded) / 2;
@@ -292,10 +310,25 @@
         mIconLayoutBounds.bottom = mIconLayoutBounds.top + mIconTouchSize;
         for (int i = count; i > 0; i--) {
             View child = getChildAt(i - 1);
-            iconEnd -= mItemMarginLeftRight;
-            int iconStart = iconEnd - mIconTouchSize;
-            child.layout(iconStart, mIconLayoutBounds.top, iconEnd, mIconLayoutBounds.bottom);
-            iconEnd = iconStart - mItemMarginLeftRight;
+            if (child == mQsb) {
+                int qsbStart;
+                int qsbEnd;
+                if (layoutRtl) {
+                    qsbStart = iconEnd + mItemMarginLeftRight;
+                    qsbEnd = qsbStart + deviceProfile.qsbWidth;
+                } else {
+                    qsbEnd = iconEnd - mItemMarginLeftRight;
+                    qsbStart = qsbEnd - deviceProfile.qsbWidth;
+                }
+                int qsbTop = (bottom - top - deviceProfile.hotseatQsbHeight) / 2;
+                int qsbBottom = qsbTop + deviceProfile.hotseatQsbHeight;
+                child.layout(qsbStart, qsbTop, qsbEnd, qsbBottom);
+            } else {
+                iconEnd -= mItemMarginLeftRight;
+                int iconStart = iconEnd - mIconTouchSize;
+                child.layout(iconStart, mIconLayoutBounds.top, iconEnd, mIconLayoutBounds.bottom);
+                iconEnd = iconStart - mItemMarginLeftRight;
+            }
         }
         mIconLayoutBounds.left = iconEnd;
     }
@@ -367,6 +400,13 @@
         return mAllAppsButton;
     }
 
+    /**
+     * Returns the QSB in the taskbar.
+     */
+    public View getQsb() {
+        return mQsb;
+    }
+
     // FolderIconParent implemented methods.
 
     @Override
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index fdd9de5..0cbd0d1 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -16,6 +16,7 @@
 package com.android.launcher3.taskbar;
 
 import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
+import static com.android.launcher3.LauncherAnimUtils.VIEW_ALPHA;
 import static com.android.launcher3.Utilities.squaredHypot;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_TASKBAR_ALLAPPS_BUTTON_TAP;
@@ -35,12 +36,15 @@
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.AlphaUpdateListener;
 import com.android.launcher3.anim.AnimatorPlaybackController;
+import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.icons.ThemedIconDrawable;
 import com.android.launcher3.model.data.ItemInfo;
+import com.android.launcher3.util.HorizontalInsettableView;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.LauncherBindableItemsContainer;
 import com.android.launcher3.util.MultiValueAlpha;
@@ -211,9 +215,10 @@
      *                       0 => not aligned
      *                       1 => fully aligned
      */
-    public void setLauncherIconAlignment(float alignmentRatio, DeviceProfile launcherDp) {
+    public void setLauncherIconAlignment(float alignmentRatio, Float endAlignment,
+            DeviceProfile launcherDp) {
         if (mIconAlignControllerLazy == null) {
-            mIconAlignControllerLazy = createIconAlignmentController(launcherDp);
+            mIconAlignControllerLazy = createIconAlignmentController(launcherDp, endAlignment);
         }
         mIconAlignControllerLazy.setPlayFraction(alignmentRatio);
         if (alignmentRatio <= 0 || alignmentRatio >= 1) {
@@ -225,11 +230,13 @@
     /**
      * Creates an animation for aligning the taskbar icons with the provided Launcher device profile
      */
-    private AnimatorPlaybackController createIconAlignmentController(DeviceProfile launcherDp) {
+    private AnimatorPlaybackController createIconAlignmentController(DeviceProfile launcherDp,
+            Float endAlignment) {
         mOnControllerPreCreateCallback.run();
         PendingAnimation setter = new PendingAnimation(100);
+        DeviceProfile taskbarDp = mActivity.getDeviceProfile();
         Rect hotseatPadding = launcherDp.getHotseatLayoutPadding(mActivity);
-        float scaleUp = ((float) launcherDp.iconSizePx) / mActivity.getDeviceProfile().iconSizePx;
+        float scaleUp = ((float) launcherDp.iconSizePx) / taskbarDp.iconSizePx;
         int borderSpacing = launcherDp.hotseatBorderSpace;
         int hotseatCellSize = DeviceProfile.calculateCellWidth(
                 launcherDp.availableWidthPx - hotseatPadding.left - hotseatPadding.right,
@@ -246,14 +253,13 @@
         }
 
         int collapsedHeight = mActivity.getDefaultTaskbarWindowHeight();
-        int expandedHeight = Math.max(collapsedHeight,
-                mActivity.getDeviceProfile().taskbarSize + offsetY);
+        int expandedHeight = Math.max(collapsedHeight, taskbarDp.taskbarSize + offsetY);
         setter.addOnFrameListener(anim -> mActivity.setTaskbarWindowHeight(
                 anim.getAnimatedFraction() > 0 ? expandedHeight : collapsedHeight));
 
+        boolean isToHome = endAlignment != null && endAlignment == 1;
         for (int i = 0; i < mTaskbarView.getChildCount(); i++) {
             View child = mTaskbarView.getChildAt(i);
-
             int positionInHotseat;
             if (FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()
                     && child == mTaskbarView.getAllAppsButtonView()) {
@@ -261,13 +267,46 @@
                 // as its convenient for animation purposes.
                 positionInHotseat = Utilities.isRtl(child.getResources())
                         ? -1
-                        : mActivity.getDeviceProfile().numShownHotseatIcons;
+                        : taskbarDp.numShownHotseatIcons;
 
                 if (!FeatureFlags.ENABLE_ALL_APPS_BUTTON_IN_HOTSEAT.get()) {
-                    setter.setViewAlpha(child, 0, LINEAR);
+                    setter.setViewAlpha(child, 0,
+                            isToHome
+                                    ? Interpolators.clampToProgress(LINEAR, 0f, 0.17f)
+                                    : Interpolators.clampToProgress(LINEAR, 0.72f, 0.84f));
                 }
             } else if (child.getTag() instanceof ItemInfo) {
                 positionInHotseat = ((ItemInfo) child.getTag()).screenId;
+            } else if (child == mTaskbarView.getQsb()) {
+                boolean isRtl = Utilities.isRtl(child.getResources());
+                float hotseatIconCenter = isRtl
+                        ? launcherDp.widthPx - hotseatPadding.right + borderSpacing
+                        + launcherDp.qsbWidth / 2f
+                        : hotseatPadding.left - borderSpacing - launcherDp.qsbWidth / 2f;
+                float childCenter = (child.getLeft() + child.getRight()) / 2f;
+                float halfQsbIconWidthDiff = (launcherDp.qsbWidth - taskbarDp.iconSizePx) / 2f;
+                setter.addFloat(child, ICON_TRANSLATE_X,
+                        isRtl ? -halfQsbIconWidthDiff : halfQsbIconWidthDiff,
+                        hotseatIconCenter - childCenter, LINEAR);
+
+                int qsbContentHeight = child.getHeight() - child.getPaddingTop()
+                        - child.getPaddingBottom();
+                float scale = ((float) taskbarDp.iconSizePx) / qsbContentHeight;
+                setter.addFloat(child, SCALE_PROPERTY, scale, 1f, LINEAR);
+
+                setter.addFloat(child, VIEW_ALPHA, 0f, 1f,
+                        isToHome
+                                ? Interpolators.clampToProgress(LINEAR, 0f, 0.35f)
+                                : Interpolators.clampToProgress(LINEAR, 0.84f, 1f));
+                setter.addOnFrameListener(animator -> AlphaUpdateListener.updateVisibility(child));
+
+                float qsbInsetFraction = halfQsbIconWidthDiff / launcherDp.qsbWidth;
+                if (child instanceof  HorizontalInsettableView) {
+                    setter.addFloat((HorizontalInsettableView) child,
+                            HorizontalInsettableView.HORIZONTAL_INSETS, qsbInsetFraction, 0,
+                            LINEAR);
+                }
+                continue;
             } else {
                 Log.w(TAG, "Unsupported view found in createIconAlignmentController, v=" + child);
                 continue;
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index 713fa25..b3e2d91 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -234,7 +234,6 @@
                     STATE_LAUNCHER_BIND_TO_SERVICE;
 
     public static final long MAX_SWIPE_DURATION = 350;
-    public static final long HOME_DURATION = StaggeredWorkspaceAnim.DURATION_MS;
 
     public static final float MIN_PROGRESS_FOR_OVERVIEW = 0.7f;
     private static final float SWIPE_DURATION_MULTIPLIER =
@@ -1141,7 +1140,9 @@
             mInputConsumerProxy.enable();
         }
         if (endTarget == HOME) {
-            duration = HOME_DURATION;
+            duration = mActivity.getDeviceProfile().isTaskbarPresent
+                    ? StaggeredWorkspaceAnim.DURATION_TASKBAR_MS
+                    : StaggeredWorkspaceAnim.DURATION_MS;
             // Early detach the nav bar once the endTarget is determined as HOME
             if (mRecentsAnimationController != null) {
                 mRecentsAnimationController.detachNavigationBarFromApp(true);
diff --git a/quickstep/src/com/android/quickstep/AnimatedFloat.java b/quickstep/src/com/android/quickstep/AnimatedFloat.java
index 6c7a885..a166553 100644
--- a/quickstep/src/com/android/quickstep/AnimatedFloat.java
+++ b/quickstep/src/com/android/quickstep/AnimatedFloat.java
@@ -133,4 +133,11 @@
     public boolean isAnimatingToValue(float endValue) {
         return isAnimating() && mEndValue != null && mEndValue == endValue;
     }
+
+    /**
+     * Returns the value we are animating to, or {@code null} if we are not currently animating.
+     */
+    public Float getEndValue() {
+        return mEndValue;
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java b/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java
index 32e08ff..de527a7 100644
--- a/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java
+++ b/quickstep/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java
@@ -41,6 +41,7 @@
 import com.android.launcher3.Hotseat;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherState;
+import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.R;
 import com.android.launcher3.ShortcutAndWidgetContainer;
 import com.android.launcher3.Workspace;
@@ -60,10 +61,10 @@
 public class StaggeredWorkspaceAnim {
 
     private static final int APP_CLOSE_ROW_START_DELAY_MS = 10;
-    // How long it takes to fade in each staggered row.
-    private static final int ALPHA_DURATION_MS = 250;
     // Should be used for animations running alongside this StaggeredWorkspaceAnim.
     public static final int DURATION_MS = 250;
+    public static final int DURATION_TASKBAR_MS =
+            QuickstepTransitionManager.TASKBAR_TO_HOME_DURATION;
 
     private static final float MAX_VELOCITY_PX_PER_S = 22f;
 
@@ -91,16 +92,20 @@
         mSpringTransY = transFactor * launcher.getResources()
                 .getDimensionPixelSize(R.dimen.swipe_up_max_workspace_trans_y);
 
+        DeviceProfile grid = launcher.getDeviceProfile();
+        long duration = grid.isTaskbarPresent ? DURATION_TASKBAR_MS : DURATION_MS;
         if (staggerWorkspace) {
-            DeviceProfile grid = launcher.getDeviceProfile();
             Workspace<?> workspace = launcher.getWorkspace();
             Hotseat hotseat = launcher.getHotseat();
 
-            // Hotseat and QSB takes up two additional rows.
-            int totalRows = grid.inv.numRows + (grid.isVerticalBarLayout() ? 0 : 2);
+            boolean staggerHotseat = !grid.isVerticalBarLayout() && !grid.isTaskbarPresent;
+            boolean staggerQsb =
+                    !grid.isVerticalBarLayout() && !(grid.isTaskbarPresent && grid.isQsbInline);
+            int totalRows = grid.inv.numRows + (staggerHotseat ? 1 : 0) + (staggerQsb ? 1 : 0);
 
             // Add animation for all the visible workspace pages
-            workspace.forEachVisiblePage(page -> addAnimationForPage((CellLayout) page, totalRows));
+            workspace.forEachVisiblePage(
+                    page -> addAnimationForPage((CellLayout) page, totalRows, duration));
 
             boolean workspaceClipChildren = workspace.getClipChildren();
             boolean workspaceClipToPadding = workspace.getClipToPadding();
@@ -119,23 +124,34 @@
                     View child = hotseatIcons.getChildAt(i);
                     CellLayout.LayoutParams lp =
                             ((CellLayout.LayoutParams) child.getLayoutParams());
-                    addStaggeredAnimationForView(child, lp.cellY + 1, totalRows);
+                    addStaggeredAnimationForView(child, lp.cellY + 1, totalRows, duration);
                 }
             } else {
                 final int hotseatRow, qsbRow;
                 if (grid.isTaskbarPresent) {
-                    qsbRow = grid.inv.numRows + 1;
-                    hotseatRow = grid.inv.numRows + 2;
+                    if (grid.isQsbInline) {
+                        qsbRow = grid.inv.numRows + 1;
+                        hotseatRow = grid.inv.numRows + 1;
+                    } else {
+                        qsbRow = grid.inv.numRows + 1;
+                        hotseatRow = grid.inv.numRows + 2;
+                    }
                 } else {
                     hotseatRow = grid.inv.numRows + 1;
                     qsbRow = grid.inv.numRows + 2;
                 }
-                for (int i = hotseatIcons.getChildCount() - 1; i >= 0; i--) {
-                    View child = hotseatIcons.getChildAt(i);
-                    addStaggeredAnimationForView(child, hotseatRow, totalRows);
-                }
 
-                addStaggeredAnimationForView(hotseat.getQsb(), qsbRow, totalRows);
+                // Do not stagger hotseat as a whole when taskbar is present, and stagger QSB only
+                // if it's not inline.
+                if (staggerHotseat) {
+                    for (int i = hotseatIcons.getChildCount() - 1; i >= 0; i--) {
+                        View child = hotseatIcons.getChildAt(i);
+                        addStaggeredAnimationForView(child, hotseatRow, totalRows, duration);
+                    }
+                }
+                if (staggerQsb) {
+                    addStaggeredAnimationForView(hotseat.getQsb(), qsbRow, totalRows, duration);
+                }
             }
 
             mAnimators.addListener(new AnimatorListenerAdapter() {
@@ -153,19 +169,19 @@
         mAnimators.addListener(forEndCallback(launcher::resumeExpensiveViewUpdates));
 
         if (animateOverviewScrim) {
-            PendingAnimation pendingAnimation = new PendingAnimation(DURATION_MS);
+            PendingAnimation pendingAnimation = new PendingAnimation(duration);
             launcher.getWorkspace().getStateTransitionAnimation()
                     .setScrim(pendingAnimation, NORMAL, new StateAnimationConfig());
             mAnimators.play(pendingAnimation.buildAnim());
         }
 
-        addDepthAnimationForState(launcher, NORMAL, DURATION_MS);
+        addDepthAnimationForState(launcher, NORMAL, duration);
 
         mAnimators.play(launcher.getRootView().getSysUiScrim().createSysuiMultiplierAnim(0f, 1f)
-                .setDuration(DURATION_MS));
+                .setDuration(duration));
     }
 
-    private void addAnimationForPage(CellLayout page, int totalRows) {
+    private void addAnimationForPage(CellLayout page, int totalRows, long duration) {
         ShortcutAndWidgetContainer itemsContainer = page.getShortcutsAndWidgets();
 
         boolean pageClipChildren = page.getClipChildren();
@@ -178,7 +194,7 @@
         for (int i = itemsContainer.getChildCount() - 1; i >= 0; i--) {
             View child = itemsContainer.getChildAt(i);
             CellLayout.LayoutParams lp = ((CellLayout.LayoutParams) child.getLayoutParams());
-            addStaggeredAnimationForView(child, lp.cellY + lp.cellVSpan, totalRows);
+            addStaggeredAnimationForView(child, lp.cellY + lp.cellVSpan, totalRows, duration);
         }
 
         mAnimators.addListener(new AnimatorListenerAdapter() {
@@ -231,8 +247,9 @@
      * @param v A view on the workspace.
      * @param row The bottom-most row that contains the view.
      * @param totalRows Total number of rows.
+     * @param duration duration of the animation
      */
-    private void addStaggeredAnimationForView(View v, int row, int totalRows) {
+    private void addStaggeredAnimationForView(View v, int row, int totalRows, long duration) {
         if (mIgnoredView != null && mIgnoredView == v) return;
         // Invert the rows, because we stagger starting from the bottom of the screen.
         int invertedRow = totalRows - row;
@@ -266,7 +283,7 @@
         v.setAlpha(0);
         ObjectAnimator alpha = ObjectAnimator.ofFloat(v, View.ALPHA, 0f, 1f);
         alpha.setInterpolator(LINEAR);
-        alpha.setDuration(ALPHA_DURATION_MS);
+        alpha.setDuration(duration);
         alpha.setStartDelay(startDelay);
         alpha.addListener(new AnimatorListenerAdapter() {
             @Override
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index 76106fc..8c4c662 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -206,6 +206,13 @@
         getShortcutsAndWidgets().setAlpha(alpha);
     }
 
+    /**
+     * Sets the alpha value of just our QSB.
+     */
+    public void setQsbAlpha(float alpha) {
+        mQsb.setAlpha(alpha);
+    }
+
     public float getIconsAlpha() {
         return getShortcutsAndWidgets().getAlpha();
     }
diff --git a/src/com/android/launcher3/util/HorizontalInsettableView.java b/src/com/android/launcher3/util/HorizontalInsettableView.java
index 7979bc0..486b73d 100644
--- a/src/com/android/launcher3/util/HorizontalInsettableView.java
+++ b/src/com/android/launcher3/util/HorizontalInsettableView.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.util;
 
+import android.util.FloatProperty;
+
 /**
  * Allows the implementing view to add insets to the left and right.
  */
@@ -32,4 +34,22 @@
      */
     void setHorizontalInsets(float insetPercentage);
 
+    /**
+     * Returns the width percentage to inset the content from the left and from the right. See
+     * {@link #setHorizontalInsets};
+     */
+    float getHorizontalInsets();
+
+    FloatProperty<HorizontalInsettableView> HORIZONTAL_INSETS =
+            new FloatProperty<HorizontalInsettableView>("horizontalInsets") {
+                @Override
+                public Float get(HorizontalInsettableView view) {
+                    return view.getHorizontalInsets();
+                }
+
+                @Override
+                public void setValue(HorizontalInsettableView view, float insetPercentage) {
+                    view.setHorizontalInsets(insetPercentage);
+                }
+            };
 }