diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index c2d107c..ee57dd9 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -222,7 +222,7 @@
     }
 
     public boolean isDraggingItem() {
-        return mTaskbarView.isDraggingItem();
+        return mContext.getDragController().isDragging();
     }
 
     /**
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 8c3d453..98b01b0 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -28,9 +28,7 @@
 import android.content.Intent;
 import android.content.pm.LauncherApps;
 import android.graphics.PixelFormat;
-import android.graphics.Point;
 import android.graphics.Rect;
-import android.graphics.drawable.Drawable;
 import android.os.Process;
 import android.os.SystemProperties;
 import android.util.Log;
@@ -43,22 +41,14 @@
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.DragSource;
-import com.android.launcher3.DropTarget;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.R;
-import com.android.launcher3.dragndrop.DragController;
-import com.android.launcher3.dragndrop.DragOptions;
-import com.android.launcher3.dragndrop.DragView;
-import com.android.launcher3.dragndrop.DraggableView;
 import com.android.launcher3.folder.Folder;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.model.data.FolderInfo;
-import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.taskbar.TaskbarNavButtonController.TaskbarButton;
 import com.android.launcher3.touch.ItemClickHandler;
@@ -89,10 +79,13 @@
     private final LayoutInflater mLayoutInflater;
     private final TaskbarDragLayer mDragLayer;
     private final TaskbarIconController mIconController;
-    private final MyDragController mDragController;
+    private final TaskbarDragController mDragController;
 
     private final WindowManager mWindowManager;
     private WindowManager.LayoutParams mWindowLayoutParams;
+    private boolean mIsFullscreen;
+    // The size we should return to when we call setTaskbarWindowFullscreen(false)
+    private int mLastRequestedNonFullscreenHeight;
 
     private final SysUINavigationMode.Mode mNavMode;
     private final TaskbarNavButtonController mNavButtonController;
@@ -114,8 +107,8 @@
         mIsSafeModeEnabled = TraceHelper.allowIpcs("isSafeMode",
                 () -> getPackageManager().isSafeMode());
 
-        mOnTaskbarIconLongClickListener =
-                new TaskbarDragController(this)::startSystemDragOnLongClick;
+        mDragController = new TaskbarDragController(this);
+        mOnTaskbarIconLongClickListener = mDragController::startDragOnLongClick;
         mOnTaskbarIconClickListener = this::onTaskbarIconClicked;
 
         float taskbarIconSize = getResources().getDimension(R.dimen.taskbar_icon_size);
@@ -126,7 +119,6 @@
         mDragLayer = (TaskbarDragLayer) mLayoutInflater
                 .inflate(R.layout.taskbar, null, false);
         mIconController = new TaskbarIconController(this, mDragLayer);
-        mDragController = new MyDragController(this);
 
         Display display = windowContext.getDisplay();
         Context c = display.getDisplayId() == Display.DEFAULT_DISPLAY
@@ -136,9 +128,10 @@
     }
 
     public void init() {
+        mLastRequestedNonFullscreenHeight = mDeviceProfile.taskbarSize;
         mWindowLayoutParams = new WindowManager.LayoutParams(
                 MATCH_PARENT,
-                mDeviceProfile.taskbarSize,
+                mLastRequestedNonFullscreenHeight,
                 TYPE_APPLICATION_OVERLAY,
                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                 PixelFormat.TRANSLUCENT);
@@ -160,17 +153,6 @@
         mWindowManager.addView(mDragLayer, mWindowLayoutParams);
     }
 
-    /**
-     * Updates the TaskbarContainer height (pass deviceProfile.taskbarSize to reset).
-     */
-    public void setTaskbarWindowHeight(int height) {
-        if (mWindowLayoutParams.height == height) {
-            return;
-        }
-        mWindowLayoutParams.height = height;
-        mWindowManager.updateViewLayout(mDragLayer, mWindowLayoutParams);
-    }
-
     public boolean canShowNavButtons() {
         return ENABLE_THREE_BUTTON_TASKBAR && mNavMode == Mode.THREE_BUTTONS;
     }
@@ -196,7 +178,7 @@
     }
 
     @Override
-    public DragController getDragController() {
+    public TaskbarDragController getDragController() {
         return mDragController;
     }
 
@@ -243,8 +225,30 @@
     /**
      * Updates the TaskbarContainer to MATCH_PARENT vs original Taskbar size.
      */
-    protected void setTaskbarWindowFullscreen(boolean fullscreen) {
-        setTaskbarWindowHeight(fullscreen ? MATCH_PARENT : getDeviceProfile().taskbarSize);
+    public void setTaskbarWindowFullscreen(boolean fullscreen) {
+        mIsFullscreen = fullscreen;
+        setTaskbarWindowHeight(fullscreen ? MATCH_PARENT : mLastRequestedNonFullscreenHeight);
+    }
+
+    /**
+     * Updates the TaskbarContainer height (pass deviceProfile.taskbarSize to reset).
+     */
+    public void setTaskbarWindowHeight(int height) {
+        if (mWindowLayoutParams.height == height) {
+            return;
+        }
+        if (height != MATCH_PARENT) {
+            mLastRequestedNonFullscreenHeight = height;
+            if (mIsFullscreen) {
+                // We still need to be fullscreen, so defer any change to our height until we call
+                // setTaskbarWindowFullscreen(false). For example, this could happen when dragging
+                // from the gesture region, as the drag will cancel the gesture and reset launcher's
+                // state, which in turn normally would reset the taskbar window height as well.
+                return;
+            }
+        }
+        mWindowLayoutParams.height = height;
+        mWindowManager.updateViewLayout(mDragLayer, mWindowLayoutParams);
     }
 
     protected void onTaskbarIconClicked(View view) {
@@ -309,27 +313,4 @@
 
         AbstractFloatingView.closeAllOpenViews(this);
     }
-
-    private static class MyDragController extends DragController<TaskbarActivityContext> {
-        MyDragController(TaskbarActivityContext activity) {
-            super(activity);
-        }
-
-        @Override
-        protected DragView startDrag(@Nullable Drawable drawable, @Nullable View view,
-                DraggableView originalView, int dragLayerX, int dragLayerY, DragSource source,
-                ItemInfo dragInfo, Point dragOffset, Rect dragRegion, float initialDragViewScale,
-                float dragViewScaleOnDrop, DragOptions options) {
-            return null;
-        }
-
-        @Override
-        protected void exitDrag() {
-        }
-
-        @Override
-        protected DropTarget getDefaultDropTarget(int[] dropCoordinates) {
-            return null;
-        }
-    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
index ee44927..855c507 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
@@ -20,19 +20,35 @@
 
 import android.content.ClipData;
 import android.content.ClipDescription;
-import android.content.Context;
 import android.content.Intent;
 import android.content.pm.LauncherApps;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Point;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
 import android.os.UserHandle;
 import android.view.DragEvent;
+import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.DragSource;
+import com.android.launcher3.DropTarget;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
+import com.android.launcher3.accessibility.DragViewStateAnnouncer;
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragDriver;
+import com.android.launcher3.dragndrop.DragOptions;
+import com.android.launcher3.dragndrop.DragView;
+import com.android.launcher3.dragndrop.DraggableView;
+import com.android.launcher3.graphics.DragPreviewProvider;
+import com.android.launcher3.icons.FastBitmapDrawable;
+import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ClipDescriptionCompat;
@@ -41,14 +57,20 @@
 /**
  * Handles long click on Taskbar items to start a system drag and drop operation.
  */
-public class TaskbarDragController {
+public class TaskbarDragController extends DragController<TaskbarActivityContext>  {
 
-    private final Context mContext;
     private final int mDragIconSize;
+    private final int[] mTempXY = new int[2];
 
-    public TaskbarDragController(Context context) {
-        mContext = context;
-        Resources resources = mContext.getResources();
+    // Where the initial touch was relative to the dragged icon.
+    private int mRegistrationX;
+    private int mRegistrationY;
+
+    private boolean mIsSystemDragInProgress;
+
+    public TaskbarDragController(TaskbarActivityContext activity) {
+        super(activity);
+        Resources resources = mActivity.getResources();
         mDragIconSize = resources.getDimensionPixelSize(R.dimen.taskbar_icon_drag_icon_size);
     }
 
@@ -57,18 +79,146 @@
      * generate the ClipDescription and Intent.
      * @return Whether {@link View#startDragAndDrop} started successfully.
      */
-    protected boolean startSystemDragOnLongClick(View view) {
+    protected boolean startDragOnLongClick(View view) {
         if (!(view instanceof BubbleTextView)) {
             return false;
         }
 
         BubbleTextView btv = (BubbleTextView) view;
-        View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view) {
+
+        mActivity.setTaskbarWindowFullscreen(true);
+        view.post(() -> {
+            startInternalDrag(btv);
+            btv.setVisibility(INVISIBLE);
+        });
+        return true;
+    }
+
+    private void startInternalDrag(BubbleTextView btv) {
+        float iconScale = 1f;
+        Drawable icon = btv.getIcon();
+        if (icon instanceof FastBitmapDrawable) {
+            iconScale = ((FastBitmapDrawable) icon).getAnimatedScale();
+        }
+
+        // Clear the pressed state if necessary
+        btv.clearFocus();
+        btv.setPressed(false);
+        btv.clearPressedBackground();
+
+        final DragPreviewProvider previewProvider = new DragPreviewProvider(btv);
+        final Drawable drawable = previewProvider.createDrawable();
+        final float scale = previewProvider.getScaleAndPosition(drawable, mTempXY);
+        int dragLayerX = mTempXY[0];
+        int dragLayerY = mTempXY[1];
+
+        Rect dragRect = new Rect();
+        btv.getSourceVisualDragBounds(dragRect);
+        dragLayerY += dragRect.top;
+
+        DragOptions dragOptions = new DragOptions();
+        // TODO: open popup/pre-drag
+        // PopupContainerWithArrow popupContainer = PopupContainerWithArrow.showForIcon(view);
+        // if (popupContainer != null) {
+        //     dragOptions.preDragCondition = popupContainer.createPreDragCondition();
+        // }
+
+        startDrag(
+                drawable,
+                /* view = */ null,
+                /* originalView = */ btv,
+                dragLayerX,
+                dragLayerY,
+                (View target, DropTarget.DragObject d, boolean success) -> {} /* DragSource */,
+                (WorkspaceItemInfo) btv.getTag(),
+                /* dragVisualizeOffset = */ null,
+                dragRect,
+                scale * iconScale,
+                scale,
+                dragOptions);
+    }
+
+    @Override
+    protected DragView startDrag(@Nullable Drawable drawable, @Nullable View view,
+            DraggableView originalView, int dragLayerX, int dragLayerY, DragSource source,
+            ItemInfo dragInfo, Point dragOffset, Rect dragRegion, float initialDragViewScale,
+            float dragViewScaleOnDrop, DragOptions options) {
+        mOptions = options;
+
+        mRegistrationX = mMotionDown.x - dragLayerX;
+        mRegistrationY = mMotionDown.y - dragLayerY;
+
+        final int dragRegionLeft = dragRegion == null ? 0 : dragRegion.left;
+        final int dragRegionTop = dragRegion == null ? 0 : dragRegion.top;
+
+        mLastDropTarget = null;
+
+        mDragObject = new DropTarget.DragObject(mActivity.getApplicationContext());
+        mDragObject.originalView = originalView;
+
+        mIsInPreDrag = mOptions.preDragCondition != null
+                && !mOptions.preDragCondition.shouldStartDrag(0);
+
+        float scalePx = mDragIconSize - dragRegion.width();
+        final DragView dragView = mDragObject.dragView = new TaskbarDragView(
+                mActivity,
+                drawable,
+                mRegistrationX,
+                mRegistrationY,
+                initialDragViewScale,
+                dragViewScaleOnDrop,
+                scalePx);
+        dragView.setItemInfo(dragInfo);
+        mDragObject.dragComplete = false;
+
+        mDragObject.xOffset = mMotionDown.x - (dragLayerX + dragRegionLeft);
+        mDragObject.yOffset = mMotionDown.y - (dragLayerY + dragRegionTop);
+
+        mDragDriver = DragDriver.create(this, mOptions, /* secondaryEventConsumer = */ ev -> {});
+        if (!mOptions.isAccessibleDrag) {
+            mDragObject.stateAnnouncer = DragViewStateAnnouncer.createFor(dragView);
+        }
+
+        mDragObject.dragSource = source;
+        mDragObject.dragInfo = dragInfo;
+        mDragObject.originalDragInfo = mDragObject.dragInfo.makeShallowCopy();
+
+        if (dragRegion != null) {
+            dragView.setDragRegion(new Rect(dragRegion));
+        }
+
+        dragView.show(mLastTouch.x, mLastTouch.y);
+        mDistanceSinceScroll = 0;
+
+        if (!mIsInPreDrag) {
+            callOnDragStart();
+        } else if (mOptions.preDragCondition != null) {
+            mOptions.preDragCondition.onPreDragStart(mDragObject);
+        }
+
+        handleMoveEvent(mLastTouch.x, mLastTouch.y);
+
+        return dragView;
+    }
+
+    @Override
+    protected void callOnDragStart() {
+        super.callOnDragStart();
+        // Pre-drag has ended, start the global system drag.
+        AbstractFloatingView.closeAllOpenViews(mActivity);
+        startSystemDrag((BubbleTextView) mDragObject.originalView);
+    }
+
+    private void startSystemDrag(BubbleTextView btv) {
+        View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(btv) {
+
             @Override
             public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) {
                 shadowSize.set(mDragIconSize, mDragIconSize);
-                // TODO: should be based on last touch point on the icon.
-                shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2);
+                // The registration point was taken before the icon scaled to mDragIconSize, so
+                // offset the registration to where the touch is on the new size.
+                int offset = (mDragIconSize - btv.getIconSize()) / 2;
+                shadowTouchPoint.set(mRegistrationX + offset, mRegistrationY + offset);
             }
 
             @Override
@@ -81,12 +231,12 @@
             }
         };
 
-        Object tag = view.getTag();
+        Object tag = btv.getTag();
         ClipDescription clipDescription = null;
         Intent intent = null;
         if (tag instanceof WorkspaceItemInfo) {
             WorkspaceItemInfo item = (WorkspaceItemInfo) tag;
-            LauncherApps launcherApps = mContext.getSystemService(LauncherApps.class);
+            LauncherApps launcherApps = mActivity.getSystemService(LauncherApps.class);
             clipDescription = new ClipDescription(item.title,
                     new String[] {
                             item.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT
@@ -116,28 +266,89 @@
 
         if (clipDescription != null && intent != null) {
             ClipData clipData = new ClipData(clipDescription, new ClipData.Item(intent));
-            view.setOnDragListener(getDraggedViewDragListener());
-            return view.startDragAndDrop(clipData, shadowBuilder, null /* localState */,
-                    View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_OPAQUE);
+            if (btv.startDragAndDrop(clipData, shadowBuilder, null /* localState */,
+                    View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_OPAQUE)) {
+                onSystemDragStarted();
+            }
         }
-        return false;
     }
 
-    /**
-     * Hide the original Taskbar item while it is being dragged.
-     */
-    private View.OnDragListener getDraggedViewDragListener() {
-        return (view, dragEvent) -> {
+    private void onSystemDragStarted() {
+        mIsSystemDragInProgress = true;
+        mActivity.getDragLayer().setOnDragListener((view, dragEvent) -> {
             switch (dragEvent.getAction()) {
                 case DragEvent.ACTION_DRAG_STARTED:
-                    view.setVisibility(INVISIBLE);
+                    // Return true to tell system we are interested in events, so we get DRAG_ENDED.
                     return true;
                 case DragEvent.ACTION_DRAG_ENDED:
-                    view.setVisibility(VISIBLE);
-                    view.setOnDragListener(null);
+                    mIsSystemDragInProgress = false;
+                    maybeOnDragEnd();
                     return true;
             }
             return false;
-        };
+        });
+    }
+
+    @Override
+    public boolean isDragging() {
+        return super.isDragging() || mIsSystemDragInProgress;
+    }
+
+    /**
+     * Whether we started dragging the given view and the drag is still in progress.
+     */
+    public boolean isDraggingView(View child) {
+        return isDragging() && mDragObject != null && mDragObject.originalView == child;
+    }
+
+    private void maybeOnDragEnd() {
+        if (!isDragging()) {
+            ((View) mDragObject.originalView).setVisibility(VISIBLE);
+        }
+    }
+
+    @Override
+    protected void callOnDragEnd() {
+        super.callOnDragEnd();
+        maybeOnDragEnd();
+    }
+
+    @Override
+    protected float getX(MotionEvent ev) {
+        // We will resize to fill the screen while dragging, so use screen coordinates. This ensures
+        // we start at the correct position even though touch down is on the smaller DragLayer size.
+        return ev.getRawX();
+    }
+
+    @Override
+    protected float getY(MotionEvent ev) {
+        // We will resize to fill the screen while dragging, so use screen coordinates. This ensures
+        // we start at the correct position even though touch down is on the smaller DragLayer size.
+        return ev.getRawY();
+    }
+
+    @Override
+    protected Point getClampedDragLayerPos(float x, float y) {
+        // No need to clamp, as we will take up the entire screen.
+        mTmpPoint.set(Math.round(x), Math.round(y));
+        return mTmpPoint;
+    }
+
+    @Override
+    protected void exitDrag() {
+        if (mDragObject != null) {
+            mActivity.getDragLayer().removeView(mDragObject.dragView);
+        }
+    }
+
+    @Override
+    public void addDropTarget(DropTarget target) {
+        // No-op as Taskbar currently doesn't support any drop targets internally.
+        // Note: if we do add internal DropTargets, we'll still need to ignore Folder.
+    }
+
+    @Override
+    protected DropTarget getDefaultDropTarget(int[] dropCoordinates) {
+        return null;
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
index 45ec911..2469f95 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
@@ -40,7 +40,7 @@
     private final int mFolderMargin;
     private final Paint mTaskbarBackgroundPaint;
 
-    private TaskbarIconController.Callbacks mControllerCallbacks;
+    private TaskbarIconController.TaskbarDragLayerCallbacks mControllerCallbacks;
     private TaskbarView mTaskbarView;
 
     private final OnComputeInsetsListener mTaskbarInsetsComputer = this::onComputeTaskbarInsets;
@@ -69,10 +69,11 @@
 
     @Override
     public void recreateControllers() {
-        mControllers = new TouchController[0];
+        mControllers = new TouchController[] {mActivity.getDragController()};
     }
 
-    public void init(TaskbarIconController.Callbacks callbacks, TaskbarView taskbarView) {
+    public void init(TaskbarIconController.TaskbarDragLayerCallbacks callbacks,
+            TaskbarView taskbarView) {
         mControllerCallbacks = callbacks;
         mTaskbarView = taskbarView;
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragView.java
new file mode 100644
index 0000000..cf28eff
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragView.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2021 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.taskbar;
+
+import android.graphics.drawable.Drawable;
+
+import com.android.launcher3.R;
+import com.android.launcher3.dragndrop.DragView;
+
+/**
+ * A DragView drawn/used by the Taskbar. Note that this is only for the internal drag-and-drop,
+ * while the pre-drag is still in progress (i.e. when the long press popup is still open). After
+ * that ends, we switch to a system drag and drop view instead.
+ */
+public class TaskbarDragView extends DragView<TaskbarActivityContext> {
+    public TaskbarDragView(TaskbarActivityContext launcher, Drawable drawable, int registrationX,
+            int registrationY, float initialScale, float scaleOnDrop, float finalScaleDps) {
+        super(launcher, drawable, registrationX, registrationY, initialScale, scaleOnDrop,
+                finalScaleDps);
+    }
+
+    @Override
+    public void animateTo(int toTouchX, int toTouchY, Runnable onCompleteRunnable, int duration) {
+        Runnable onAnimationEnd = () -> {
+            if (onCompleteRunnable != null) {
+                onCompleteRunnable.run();
+            }
+            mActivity.getDragLayer().removeView(this);
+        };
+
+        duration = Math.max(duration,
+                getResources().getInteger(R.integer.config_dropAnimMinDuration));
+
+        animate()
+                .translationX(toTouchX - mRegistrationX)
+                .translationY(toTouchY - mRegistrationY)
+                .scaleX(mScaleOnDrop)
+                .scaleY(mScaleOnDrop)
+                .withEndAction(onAnimationEnd)
+                .setDuration(duration)
+                .start();
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java
index 683a5b9..cf0694b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java
@@ -62,10 +62,11 @@
 
         ButtonProvider buttonProvider = new ButtonProvider(mActivity);
         mImeBarView.init(buttonProvider);
-        mTaskbarView.construct(clickListener, longClickListener, buttonProvider);
+        mTaskbarView.init(new TaskbarViewCallbacks(), clickListener, longClickListener,
+                buttonProvider);
         mTaskbarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarSize;
 
-        mDragLayer.init(new Callbacks(), mTaskbarView);
+        mDragLayer.init(new TaskbarDragLayerCallbacks(), mTaskbarView);
     }
 
     public void onDestroy() {
@@ -102,7 +103,7 @@
     /**
      * Callbacks for {@link TaskbarDragLayer} to interact with the icon controller
      */
-    public class Callbacks {
+    public class TaskbarDragLayerCallbacks {
 
         /**
          * Called to update the touchable insets
@@ -160,4 +161,16 @@
             mImeBarView.setVisibility(alpha == 0 ? GONE : VISIBLE);
         }
     }
+
+    /**
+     * Callbacks for {@link TaskbarView} to interact with the icon controller
+     */
+    public class TaskbarViewCallbacks {
+        /**
+         * Returns whether no other controller is currently handling the given View's visibility.
+         */
+        public boolean canUpdateViewVisibility(View child) {
+            return !mActivity.getDragController().isDraggingView(child);
+        }
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index c6573a6..ac70358 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -24,7 +24,6 @@
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.util.AttributeSet;
-import android.view.DragEvent;
 import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.View;
@@ -35,7 +34,6 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
-import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
@@ -62,7 +60,8 @@
 
     private final TaskbarActivityContext mActivityContext;
 
-    // Initialized in TaskbarController constructor.
+    // Initialized in init.
+    private TaskbarIconController.TaskbarViewCallbacks mControllerCallbacks;
     private View.OnClickListener mIconClickListener;
     private View.OnLongClickListener mIconLongClickListener;
 
@@ -75,7 +74,6 @@
     // Prevents dispatching touches to children if true
     private boolean mTouchEnabled = true;
 
-    private boolean mIsDraggingItem;
     // Only non-null when the corresponding Folder is open.
     private @Nullable FolderIcon mLeaveBehindFolderIcon;
 
@@ -118,8 +116,10 @@
         mHotseatIconsContainer = findViewById(R.id.hotseat_icons_layout);
     }
 
-    protected void construct(OnClickListener clickListener, OnLongClickListener longClickListener,
-                ButtonProvider buttonProvider) {
+    protected void init(TaskbarIconController.TaskbarViewCallbacks callbacks,
+            OnClickListener clickListener, OnLongClickListener longClickListener,
+            ButtonProvider buttonProvider) {
+        mControllerCallbacks = callbacks;
         mIconClickListener = clickListener;
         mIconLongClickListener = longClickListener;
         mButtonProvider = buttonProvider;
@@ -225,6 +225,9 @@
     }
 
     private void updateHotseatItemVisibility(View hotseatView) {
+        if (!mControllerCallbacks.canUpdateViewVisibility(hotseatView)) {
+            return;
+        }
         hotseatView.setVisibility(
                 hotseatView.getTag() != null ? VISIBLE : (mAreHolesAllowed ? INVISIBLE : GONE));
     }
@@ -349,24 +352,6 @@
         mSystemButtonContainer.addView(mButtonProvider.getRecents(), buttonParams);
     }
 
-    @Override
-    public boolean onDragEvent(DragEvent event) {
-        switch (event.getAction()) {
-            case DragEvent.ACTION_DRAG_STARTED:
-                mIsDraggingItem = true;
-                AbstractFloatingView.closeAllOpenViews(mActivityContext);
-                return true;
-            case DragEvent.ACTION_DRAG_ENDED:
-                mIsDraggingItem = false;
-                break;
-        }
-        return super.onDragEvent(event);
-    }
-
-    public boolean isDraggingItem() {
-        return mIsDraggingItem;
-    }
-
     /**
      * @return The bounding box of where the hotseat elements are relative to this TaskbarView.
      */
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index 7866786..150db1e 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -413,7 +413,7 @@
         }
     }
 
-    void clearPressedBackground() {
+    public void clearPressedBackground() {
         setPressed(false);
         setStayPressed(false);
     }
@@ -859,8 +859,9 @@
         switch (display) {
             case DISPLAY_ALL_APPS:
                 return grid.allAppsIconSizePx;
-            case DISPLAY_WORKSPACE:
             case DISPLAY_FOLDER:
+                return grid.folderChildIconSizePx;
+            case DISPLAY_WORKSPACE:
             default:
                 return grid.iconSizePx;
         }
diff --git a/src/com/android/launcher3/dragndrop/DragController.java b/src/com/android/launcher3/dragndrop/DragController.java
index 5731db4..1e0edac 100644
--- a/src/com/android/launcher3/dragndrop/DragController.java
+++ b/src/com/android/launcher3/dragndrop/DragController.java
@@ -74,7 +74,7 @@
     /** Coordinate for last touch event **/
     protected final Point mLastTouch = new Point();
 
-    private final Point mTmpPoint = new Point();
+    protected final Point mTmpPoint = new Point();
 
     protected DropTarget.DragObject mDragObject;
 
@@ -317,7 +317,7 @@
         mDragObject.dragView.animateTo(mMotionDown.x, mMotionDown.y, onCompleteRunnable, duration);
     }
 
-    private void callOnDragEnd() {
+    protected void callOnDragEnd() {
         if (mIsInPreDrag && mOptions.preDragCondition != null) {
             mOptions.preDragCondition.onPreDragEnd(mDragObject, false /* dragStarted*/);
         }
@@ -343,7 +343,7 @@
     /**
      * Clamps the position to the drag layer bounds.
      */
-    private Point getClampedDragLayerPos(float x, float y) {
+    protected Point getClampedDragLayerPos(float x, float y) {
         mActivity.getDragLayer().getLocalVisibleRect(mRectTemp);
         mTmpPoint.x = (int) Math.max(mRectTemp.left, Math.min(x, mRectTemp.right - 1));
         mTmpPoint.y = (int) Math.max(mRectTemp.top, Math.min(y, mRectTemp.bottom - 1));
@@ -390,7 +390,7 @@
             return false;
         }
 
-        Point dragLayerPos = getClampedDragLayerPos(ev.getX(), ev.getY());
+        Point dragLayerPos = getClampedDragLayerPos(getX(ev), getY(ev));
         mLastTouch.set(dragLayerPos.x,  dragLayerPos.y);
         if (ev.getAction() == MotionEvent.ACTION_DOWN) {
             // Remember location of down touch
@@ -403,6 +403,14 @@
         return mDragDriver != null && mDragDriver.onInterceptTouchEvent(ev);
     }
 
+    protected float getX(MotionEvent ev) {
+        return ev.getX();
+    }
+
+    protected float getY(MotionEvent ev) {
+        return ev.getY();
+    }
+
     /**
      * Call this from a drag source view.
      */
diff --git a/src/com/android/launcher3/dragndrop/DragDriver.java b/src/com/android/launcher3/dragndrop/DragDriver.java
index d4ce308..72e47e5 100644
--- a/src/com/android/launcher3/dragndrop/DragDriver.java
+++ b/src/com/android/launcher3/dragndrop/DragDriver.java
@@ -165,8 +165,11 @@
      * Class for driving an internal (i.e. not using framework) drag/drop operation.
      */
     static class InternalDragDriver extends DragDriver {
+        private final DragController mDragController;
+
         InternalDragDriver(DragController dragController, Consumer<MotionEvent> sec) {
             super(dragController, sec);
+            mDragController = dragController;
         }
 
         @Override
@@ -176,11 +179,14 @@
 
             switch (action) {
                 case MotionEvent.ACTION_MOVE:
-                    mEventListener.onDriverDragMove(ev.getX(), ev.getY());
+                    mEventListener.onDriverDragMove(mDragController.getX(ev),
+                            mDragController.getY(ev));
                     break;
                 case MotionEvent.ACTION_UP:
-                    mEventListener.onDriverDragMove(ev.getX(), ev.getY());
-                    mEventListener.onDriverDragEnd(ev.getX(), ev.getY());
+                    mEventListener.onDriverDragMove(mDragController.getX(ev),
+                            mDragController.getY(ev));
+                    mEventListener.onDriverDragEnd(mDragController.getX(ev),
+                            mDragController.getY(ev));
                     break;
                 case MotionEvent.ACTION_CANCEL:
                     mEventListener.onDriverDragCancel();
@@ -197,7 +203,8 @@
 
             switch (action) {
                 case MotionEvent.ACTION_UP:
-                    mEventListener.onDriverDragEnd(ev.getX(), ev.getY());
+                    mEventListener.onDriverDragEnd(mDragController.getX(ev),
+                            mDragController.getY(ev));
                     break;
                 case MotionEvent.ACTION_CANCEL:
                     mEventListener.onDriverDragCancel();