Adds Overview Sandbox tutorial.

Extracts fake task view animation logic to
SwipeUpGestureTutorialController, which
Home and Overview controllers extend.

Fixes: 157945497
Change-Id: Ibd1c129c57e9bee8db62baae455ca1bd9df114c7
diff --git a/quickstep/res/values/strings.xml b/quickstep/res/values/strings.xml
index be1d47b..77345a0 100644
--- a/quickstep/res/values/strings.xml
+++ b/quickstep/res/values/strings.xml
@@ -87,7 +87,6 @@
     <!-- content description for hotseat items -->
     <string name="hotseat_prediction_content_description">Predicted app: <xliff:g id="title" example="Chrome">%1$s</xliff:g></string>
 
-
     <!-- Title shown during interactive part of Back gesture tutorial for right edge. [CHAR LIMIT=30] -->
     <string name="back_gesture_tutorial_playground_title_swipe_inward_right_edge" translatable="false">Try the back gesture</string>
     <!-- Subtitle shown during interactive parts of Back gesture tutorial for right edge. [CHAR LIMIT=60] -->
@@ -111,7 +110,6 @@
     <!-- Subtitle shown on the confirmation screen after successful gesture. [CHAR LIMIT=60] -->
     <string name="back_gesture_tutorial_confirm_subtitle" translatable="false">To change the sensitivity of the back gesture, go to Settings</string>
 
-
     <!-- Title shown during interactive part of Home gesture tutorial. [CHAR LIMIT=30] -->
     <string name="home_gesture_tutorial_playground_title" translatable="false">Tutorial: Go Home</string>
     <!-- Subtitle shown during interactive parts of Home gesture tutorial. [CHAR LIMIT=60] -->
@@ -123,6 +121,17 @@
     <!-- Feedback shown during interactive parts of Home gesture tutorial when the gesture is horizontal instead of vertical. [CHAR LIMIT=100] -->
     <string name="home_gesture_feedback_wrong_swipe_direction" translatable="false">Make sure you swipe straight up</string>
 
+    <!-- Title shown during interactive part of Overview gesture tutorial. [CHAR LIMIT=30] -->
+    <string name="overview_gesture_tutorial_playground_title" translatable="false">Tutorial: Switch Apps</string>
+    <!-- Subtitle shown during interactive parts of Overview gesture tutorial. [CHAR LIMIT=60] -->
+    <string name="overview_gesture_tutorial_playground_subtitle" translatable="false">Swipe up from the bottom of the screen and hold</string>
+    <!-- Feedback shown during interactive parts of Overview gesture tutorial when the gesture is started too far from the edge. [CHAR LIMIT=100] -->
+    <string name="overview_gesture_feedback_swipe_too_far_from_edge" translatable="false">Make sure you swipe from the bottom edge of the screen</string>
+    <!-- Feedback shown during interactive parts of Overview gesture tutorial when the Home gesture is detected. [CHAR LIMIT=100] -->
+    <string name="overview_gesture_feedback_home_detected" translatable="false">Try holding the window for longer before releasing</string>
+    <!-- Feedback shown during interactive parts of Overview gesture tutorial when the gesture is horizontal instead of vertical. [CHAR LIMIT=100] -->
+    <string name="overview_gesture_feedback_wrong_swipe_direction" translatable="false">Make sure you swipe straight up and pause</string>
+
     <!-- Title shown on the confirmation screen after successful gesture. [CHAR LIMIT=30] -->
     <string name="gesture_tutorial_confirm_title" translatable="false">All set</string>
     <!-- Button text shown on a button on the confirm screen to leave the tutorial. [CHAR LIMIT=14] -->
diff --git a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
index 41e86e0..1f398fc 100644
--- a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
+++ b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
@@ -35,14 +35,6 @@
     }
 
     @Override
-    void transitToController() {
-        super.transitToController();
-        if (mTutorialType != BACK_NAVIGATION_COMPLETE) {
-            showHandCoachingAnimation();
-        }
-    }
-
-    @Override
     Integer getTitleStringId() {
         switch (mTutorialType) {
             case RIGHT_EDGE_BACK_NAVIGATION:
diff --git a/quickstep/src/com/android/quickstep/interaction/HomeGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/HomeGestureTutorialController.java
index 65f41a4..0edabd4 100644
--- a/quickstep/src/com/android/quickstep/interaction/HomeGestureTutorialController.java
+++ b/quickstep/src/com/android/quickstep/interaction/HomeGestureTutorialController.java
@@ -15,143 +15,23 @@
  */
 package com.android.quickstep.interaction;
 
-import static com.android.launcher3.anim.Interpolators.ACCEL;
-import static com.android.launcher3.util.DefaultDisplay.getSingleFrameMs;
-import static com.android.quickstep.BaseSwipeUpHandlerV2.MAX_SWIPE_DURATION;
 import static com.android.quickstep.interaction.TutorialController.TutorialType.HOME_NAVIGATION_COMPLETE;
 
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.animation.AnimatorSet;
 import android.annotation.TargetApi;
-import android.content.Context;
-import android.graphics.Insets;
-import android.graphics.Outline;
 import android.graphics.PointF;
-import android.graphics.Rect;
-import android.graphics.RectF;
 import android.os.Build;
-import android.view.SurfaceControl;
 import android.view.View;
-import android.view.ViewOutlineProvider;
-import android.view.WindowInsets.Type;
-import android.view.WindowManager;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
-import com.android.launcher3.anim.AnimationSuccessListener;
-import com.android.launcher3.anim.AnimatorPlaybackController;
-import com.android.launcher3.anim.PendingAnimation;
-import com.android.quickstep.AnimatedFloat;
-import com.android.quickstep.GestureState;
-import com.android.quickstep.OverviewComponentObserver;
-import com.android.quickstep.RecentsAnimationDeviceState;
-import com.android.quickstep.SwipeUpAnimationLogic;
-import com.android.quickstep.SwipeUpAnimationLogic.RunningWindowAnim;
 import com.android.quickstep.interaction.EdgeBackGestureHandler.BackGestureResult;
 import com.android.quickstep.interaction.NavBarGestureHandler.NavBarGestureResult;
-import com.android.quickstep.util.RectFSpringAnim;
-import com.android.quickstep.util.TransformParams;
-import com.android.systemui.shared.system.QuickStepContract;
-import com.android.systemui.shared.system.SyncRtSurfaceTransactionApplierCompat.SurfaceParams;
 
 /** A {@link TutorialController} for the Home tutorial. */
 @TargetApi(Build.VERSION_CODES.R)
-final class HomeGestureTutorialController extends TutorialController {
-
-    private float mFakeTaskViewRadius;
-    private Rect mFakeTaskViewRect = new Rect();
-
-    private final ViewSwipeUpAnimation mViewSwipeUpAnimation;
-    private RunningWindowAnim mRunningWindowAnim;
+final class HomeGestureTutorialController extends SwipeUpGestureTutorialController {
 
     HomeGestureTutorialController(HomeGestureTutorialFragment fragment, TutorialType tutorialType) {
         super(fragment, tutorialType);
-
-        RecentsAnimationDeviceState deviceState = new RecentsAnimationDeviceState(mContext);
-        OverviewComponentObserver observer = new OverviewComponentObserver(mContext, deviceState);
-        mViewSwipeUpAnimation = new ViewSwipeUpAnimation(mContext, deviceState,
-                new GestureState(observer, -1));
-        observer.onDestroy();
-        deviceState.destroy();
-
-        DeviceProfile dp = InvariantDeviceProfile.INSTANCE.get(mContext)
-                .getDeviceProfile(mContext)
-                .copy(mContext);
-        Insets insets = mContext.getSystemService(WindowManager.class)
-                .getCurrentWindowMetrics()
-                .getWindowInsets()
-                .getInsets(Type.systemBars());
-        dp.updateInsets(new Rect(insets.left, insets.top, insets.right, insets.bottom));
-        mViewSwipeUpAnimation.initDp(dp);
-
-        mFakeTaskViewRadius = QuickStepContract.getWindowCornerRadius(mContext.getResources());
-
-        mFakeTaskView.setClipToOutline(true);
-        mFakeTaskView.setOutlineProvider(new ViewOutlineProvider() {
-            @Override
-            public void getOutline(View view, Outline outline) {
-                outline.setRoundRect(mFakeTaskViewRect, mFakeTaskViewRadius);
-            }
-        });
-    }
-
-    private void cancelRunningAnimation() {
-        if (mRunningWindowAnim != null) {
-            mRunningWindowAnim.cancel();
-        }
-        mRunningWindowAnim = null;
-    }
-
-    /** Fades the task view, optionally after animating to a fake Overview. */
-    private void fadeOutFakeTaskView(boolean toOverviewFirst, @Nullable Runnable onEndRunnable) {
-        cancelRunningAnimation();
-        PendingAnimation anim = new PendingAnimation(300);
-        AnimatorListenerAdapter resetTaskView = new AnimatorListenerAdapter() {
-            @Override
-            public void onAnimationEnd(Animator animation, boolean isReverse) {
-                mFakeTaskView.setVisibility(View.INVISIBLE);
-                mFakeTaskView.setAlpha(1);
-                mRunningWindowAnim = null;
-            }
-        };
-        if (toOverviewFirst) {
-            anim.setFloat(mViewSwipeUpAnimation.getCurrentShift(), AnimatedFloat.VALUE, 1, ACCEL);
-            anim.addListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(Animator animation, boolean isReverse) {
-                    PendingAnimation fadeAnim = new PendingAnimation(300);
-                    fadeAnim.setViewAlpha(mFakeTaskView, 0, ACCEL);
-                    fadeAnim.addListener(resetTaskView);
-                    AnimatorSet animset = fadeAnim.buildAnim();
-                    animset.setStartDelay(100);
-                    animset.start();
-                    mRunningWindowAnim = RunningWindowAnim.wrap(animset);
-                }
-            });
-        } else {
-            anim.setViewAlpha(mFakeTaskView, 0, ACCEL);
-            anim.addListener(resetTaskView);
-        }
-        if (onEndRunnable != null) {
-            anim.addListener(AnimationSuccessListener.forRunnable(onEndRunnable));
-        }
-        AnimatorSet animset = anim.buildAnim();
-        animset.start();
-        mRunningWindowAnim = RunningWindowAnim.wrap(animset);
-    }
-
-    @Override
-    void transitToController() {
-        super.transitToController();
-        if (mTutorialType != HOME_NAVIGATION_COMPLETE) {
-            showHandCoachingAnimation();
-        }
     }
 
     @Override
@@ -190,6 +70,14 @@
     public void onBackGestureAttempted(BackGestureResult result) {
         switch (mTutorialType) {
             case HOME_NAVIGATION:
+                switch (result) {
+                    case BACK_COMPLETED_FROM_LEFT:
+                    case BACK_COMPLETED_FROM_RIGHT:
+                    case BACK_CANCELLED_FROM_LEFT:
+                    case BACK_CANCELLED_FROM_RIGHT:
+                        showFeedback(R.string.home_gesture_feedback_swipe_too_far_from_edge);
+                        break;
+                }
                 break;
             case HOME_NAVIGATION_COMPLETE:
                 if (result == BackGestureResult.BACK_COMPLETED_FROM_LEFT
@@ -206,17 +94,8 @@
             case HOME_NAVIGATION:
                 switch (result) {
                     case HOME_GESTURE_COMPLETED: {
-                        hideFeedback();
-                        cancelRunningAnimation();
-                        hideHandCoachingAnimation();
-                        RectFSpringAnim rectAnim =
-                                mViewSwipeUpAnimation.handleSwipeUpToHome(finalVelocity);
-                        // After home animation finishes, fade out and then move to the next screen.
-                        rectAnim.addAnimatorListener(AnimationSuccessListener.forRunnable(
-                                () -> fadeOutFakeTaskView(false,
-                                        () -> mTutorialFragment.changeController(
-                                                HOME_NAVIGATION_COMPLETE))));
-                        mRunningWindowAnim = RunningWindowAnim.wrap(rectAnim);
+                        animateFakeTaskViewHome(finalVelocity, () ->
+                                mTutorialFragment.changeController(HOME_NAVIGATION_COMPLETE));
                         break;
                     }
                     case HOME_NOT_STARTED_TOO_FAR_FROM_EDGE:
@@ -242,93 +121,4 @@
         }
     }
 
-    @Override
-    public void setNavBarGestureProgress(@Nullable Float displacement) {
-        if (displacement == null || mTutorialType == HOME_NAVIGATION_COMPLETE) {
-            mFakeTaskView.setVisibility(View.INVISIBLE);
-        } else {
-            mFakeTaskView.setVisibility(View.VISIBLE);
-            if (mRunningWindowAnim == null) {
-                mViewSwipeUpAnimation.updateDisplacement(displacement);
-            }
-        }
-    }
-
-    private class ViewSwipeUpAnimation extends SwipeUpAnimationLogic {
-
-        ViewSwipeUpAnimation(Context context, RecentsAnimationDeviceState deviceState,
-                             GestureState gestureState) {
-            super(context, deviceState, gestureState, new FakeTransformParams());
-        }
-
-        void initDp(DeviceProfile dp) {
-            initTransitionEndpoints(dp);
-            mTaskViewSimulator.setPreviewBounds(
-                    new Rect(0, 0, dp.widthPx, dp.heightPx), dp.getInsets());
-        }
-
-        @Override
-        public void updateFinalShift() {
-            float progress = mCurrentShift.value / mDragLengthFactor;
-            mWindowTransitionController.setPlayFraction(progress);
-            mTaskViewSimulator.apply(mTransformParams);
-        }
-
-        AnimatedFloat getCurrentShift() {
-            return mCurrentShift;
-        }
-
-        RectFSpringAnim handleSwipeUpToHome(PointF velocity) {
-            PointF velocityPxPerMs = new PointF(velocity.x, velocity.y);
-            float currentShift = mCurrentShift.value;
-            final float startShift = Utilities.boundToRange(currentShift - velocityPxPerMs.y
-                    * getSingleFrameMs(mContext) / mTransitionDragLength, 0, mDragLengthFactor);
-            float distanceToTravel = (1 - currentShift) * mTransitionDragLength;
-
-            // we want the page's snap velocity to approximately match the velocity at
-            // which the user flings, so we scale the duration by a value near to the
-            // derivative of the scroll interpolator at zero, ie. 2.
-            long baseDuration = Math.round(Math.abs(distanceToTravel / velocityPxPerMs.y));
-            long duration = Math.min(MAX_SWIPE_DURATION, 2 * baseDuration);
-            HomeAnimationFactory homeAnimFactory = new HomeAnimationFactory(null) {
-                @Override
-                public AnimatorPlaybackController createActivityAnimationToHome() {
-                    return AnimatorPlaybackController.wrap(new AnimatorSet(), duration);
-                }
-
-                @NonNull
-                @Override
-                public RectF getWindowTargetRect() {
-                    int fakeHomeIconSizePx = mDp.allAppsIconSizePx;
-                    int fakeHomeIconLeft = (mDp.widthPx - fakeHomeIconSizePx) / 2;
-                    int fakeHomeIconTop = mDp.heightPx - (mDp.allAppsCellHeightPx * 3);
-                    return new RectF(fakeHomeIconLeft, fakeHomeIconTop,
-                            fakeHomeIconLeft + fakeHomeIconSizePx,
-                            fakeHomeIconTop + fakeHomeIconSizePx);
-                }
-            };
-            RectFSpringAnim windowAnim = createWindowAnimationToHome(startShift, homeAnimFactory);
-            windowAnim.start(mContext, velocityPxPerMs);
-            return windowAnim;
-        }
-    }
-
-    private class FakeTransformParams extends TransformParams {
-
-        @Override
-        public SurfaceParams[] createSurfaceParams(BuilderProxy proxy) {
-            SurfaceParams.Builder builder = new SurfaceParams.Builder((SurfaceControl) null);
-            proxy.onBuildTargetParams(builder, null, this);
-            return new SurfaceParams[] {builder.build()};
-        }
-
-        @Override
-        public void applySurfaceParams(SurfaceParams[] params) {
-            SurfaceParams p = params[0];
-            mFakeTaskView.setAnimationMatrix(p.matrix);
-            mFakeTaskViewRect.set(p.windowCrop);
-            mFakeTaskViewRadius = p.cornerRadius;
-            mFakeTaskView.invalidateOutline();
-        }
-    }
 }
diff --git a/quickstep/src/com/android/quickstep/interaction/OverviewGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/OverviewGestureTutorialController.java
new file mode 100644
index 0000000..c636eba
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/interaction/OverviewGestureTutorialController.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2020 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.quickstep.interaction;
+
+import static com.android.quickstep.interaction.TutorialController.TutorialType.OVERVIEW_NAVIGATION_COMPLETE;
+
+import android.annotation.TargetApi;
+import android.graphics.PointF;
+import android.os.Build;
+import android.view.View;
+
+import com.android.launcher3.R;
+import com.android.quickstep.interaction.EdgeBackGestureHandler.BackGestureResult;
+import com.android.quickstep.interaction.NavBarGestureHandler.NavBarGestureResult;
+
+/** A {@link TutorialController} for the Overview tutorial. */
+@TargetApi(Build.VERSION_CODES.R)
+final class OverviewGestureTutorialController extends SwipeUpGestureTutorialController {
+
+    OverviewGestureTutorialController(OverviewGestureTutorialFragment fragment,
+            TutorialType tutorialType) {
+        super(fragment, tutorialType);
+    }
+
+    @Override
+    Integer getTitleStringId() {
+        switch (mTutorialType) {
+            case OVERVIEW_NAVIGATION:
+                return R.string.overview_gesture_tutorial_playground_title;
+            case OVERVIEW_NAVIGATION_COMPLETE:
+                return R.string.gesture_tutorial_confirm_title;
+        }
+        return null;
+    }
+
+    @Override
+    Integer getSubtitleStringId() {
+        if (mTutorialType == TutorialType.OVERVIEW_NAVIGATION) {
+            return R.string.overview_gesture_tutorial_playground_subtitle;
+        }
+        return null;
+    }
+
+    @Override
+    Integer getActionButtonStringId() {
+        if (mTutorialType == OVERVIEW_NAVIGATION_COMPLETE) {
+            return R.string.gesture_tutorial_action_button_label_done;
+        }
+        return null;
+    }
+
+    @Override
+    void onActionButtonClicked(View button) {
+        mTutorialFragment.closeTutorial();
+    }
+
+    @Override
+    public void onBackGestureAttempted(BackGestureResult result) {
+        switch (mTutorialType) {
+            case OVERVIEW_NAVIGATION:
+                switch (result) {
+                    case BACK_COMPLETED_FROM_LEFT:
+                    case BACK_COMPLETED_FROM_RIGHT:
+                    case BACK_CANCELLED_FROM_LEFT:
+                    case BACK_CANCELLED_FROM_RIGHT:
+                        showFeedback(R.string.overview_gesture_feedback_swipe_too_far_from_edge);
+                        break;
+                }
+                break;
+            case OVERVIEW_NAVIGATION_COMPLETE:
+                if (result == BackGestureResult.BACK_COMPLETED_FROM_LEFT
+                        || result == BackGestureResult.BACK_COMPLETED_FROM_RIGHT) {
+                    mTutorialFragment.closeTutorial();
+                }
+                break;
+        }
+    }
+
+    @Override
+    public void onNavBarGestureAttempted(NavBarGestureResult result, PointF finalVelocity) {
+        switch (mTutorialType) {
+            case OVERVIEW_NAVIGATION:
+                switch (result) {
+                    case HOME_GESTURE_COMPLETED: {
+                        animateFakeTaskViewHome(finalVelocity, () ->
+                                showFeedback(R.string.overview_gesture_feedback_home_detected));
+                        break;
+                    }
+                    case HOME_NOT_STARTED_TOO_FAR_FROM_EDGE:
+                    case OVERVIEW_NOT_STARTED_TOO_FAR_FROM_EDGE:
+                        showFeedback(R.string.overview_gesture_feedback_swipe_too_far_from_edge);
+                        break;
+                    case OVERVIEW_GESTURE_COMPLETED:
+                        fadeOutFakeTaskView(true, () ->
+                                mTutorialFragment.changeController(OVERVIEW_NAVIGATION_COMPLETE));
+                        break;
+                    case HOME_OR_OVERVIEW_NOT_STARTED_WRONG_SWIPE_DIRECTION:
+                    case HOME_OR_OVERVIEW_CANCELLED:
+                        fadeOutFakeTaskView(false, null);
+                        showFeedback(R.string.overview_gesture_feedback_wrong_swipe_direction);
+                        break;
+                }
+                break;
+            case OVERVIEW_NAVIGATION_COMPLETE:
+                if (result == NavBarGestureResult.HOME_GESTURE_COMPLETED) {
+                    mTutorialFragment.closeTutorial();
+                }
+                break;
+        }
+    }
+}
diff --git a/quickstep/src/com/android/quickstep/interaction/OverviewGestureTutorialFragment.java b/quickstep/src/com/android/quickstep/interaction/OverviewGestureTutorialFragment.java
new file mode 100644
index 0000000..3357b70
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/interaction/OverviewGestureTutorialFragment.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2020 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.quickstep.interaction;
+
+import com.android.launcher3.R;
+import com.android.quickstep.interaction.TutorialController.TutorialType;
+
+/** Shows the Overview gesture interactive tutorial. */
+public class OverviewGestureTutorialFragment extends TutorialFragment {
+    @Override
+    int getHandAnimationResId() {
+        return R.drawable.overview_gesture;
+    }
+
+    @Override
+    TutorialController createController(TutorialType type) {
+        return new OverviewGestureTutorialController(this, type);
+    }
+
+    @Override
+    Class<? extends TutorialController> getControllerClass() {
+        return OverviewGestureTutorialController.class;
+    }
+}
diff --git a/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java
new file mode 100644
index 0000000..14e00dc
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java
@@ -0,0 +1,246 @@
+/*
+ * Copyright (C) 2020 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.quickstep.interaction;
+
+import static com.android.launcher3.anim.Interpolators.ACCEL;
+import static com.android.launcher3.util.DefaultDisplay.getSingleFrameMs;
+import static com.android.quickstep.BaseSwipeUpHandlerV2.MAX_SWIPE_DURATION;
+import static com.android.quickstep.interaction.TutorialController.TutorialType.HOME_NAVIGATION_COMPLETE;
+import static com.android.quickstep.interaction.TutorialController.TutorialType.OVERVIEW_NAVIGATION_COMPLETE;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.graphics.Insets;
+import android.graphics.Outline;
+import android.graphics.PointF;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.os.Build;
+import android.view.SurfaceControl;
+import android.view.View;
+import android.view.ViewOutlineProvider;
+import android.view.WindowInsets;
+import android.view.WindowManager;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.InvariantDeviceProfile;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.AnimationSuccessListener;
+import com.android.launcher3.anim.AnimatorPlaybackController;
+import com.android.launcher3.anim.PendingAnimation;
+import com.android.quickstep.AnimatedFloat;
+import com.android.quickstep.GestureState;
+import com.android.quickstep.OverviewComponentObserver;
+import com.android.quickstep.RecentsAnimationDeviceState;
+import com.android.quickstep.SwipeUpAnimationLogic;
+import com.android.quickstep.SwipeUpAnimationLogic.RunningWindowAnim;
+import com.android.quickstep.util.RectFSpringAnim;
+import com.android.quickstep.util.TransformParams;
+import com.android.systemui.shared.system.QuickStepContract;
+import com.android.systemui.shared.system.SyncRtSurfaceTransactionApplierCompat.SurfaceParams;
+
+@TargetApi(Build.VERSION_CODES.R)
+abstract class SwipeUpGestureTutorialController extends TutorialController {
+    private final ViewSwipeUpAnimation mViewSwipeUpAnimation;
+    private float mFakeTaskViewRadius;
+    private Rect mFakeTaskViewRect = new Rect();
+    private RunningWindowAnim mRunningWindowAnim;
+
+    SwipeUpGestureTutorialController(TutorialFragment tutorialFragment, TutorialType tutorialType) {
+        super(tutorialFragment, tutorialType);
+        RecentsAnimationDeviceState deviceState = new RecentsAnimationDeviceState(mContext);
+        OverviewComponentObserver observer = new OverviewComponentObserver(mContext, deviceState);
+        mViewSwipeUpAnimation = new ViewSwipeUpAnimation(mContext, deviceState,
+                new GestureState(observer, -1));
+        observer.onDestroy();
+        deviceState.destroy();
+
+        DeviceProfile dp = InvariantDeviceProfile.INSTANCE.get(mContext)
+                .getDeviceProfile(mContext)
+                .copy(mContext);
+        Insets insets = mContext.getSystemService(WindowManager.class)
+                .getCurrentWindowMetrics()
+                .getWindowInsets()
+                .getInsets(WindowInsets.Type.systemBars());
+        dp.updateInsets(new Rect(insets.left, insets.top, insets.right, insets.bottom));
+        mViewSwipeUpAnimation.initDp(dp);
+
+        mFakeTaskViewRadius = QuickStepContract.getWindowCornerRadius(mContext.getResources());
+        mFakeTaskView.setClipToOutline(true);
+        mFakeTaskView.setOutlineProvider(new ViewOutlineProvider() {
+            @Override
+            public void getOutline(View view, Outline outline) {
+                outline.setRoundRect(mFakeTaskViewRect, mFakeTaskViewRadius);
+            }
+        });
+    }
+
+    private void cancelRunningAnimation() {
+        if (mRunningWindowAnim != null) {
+            mRunningWindowAnim.cancel();
+        }
+        mRunningWindowAnim = null;
+    }
+
+    /** Fades the task view, optionally after animating to a fake Overview. */
+    void fadeOutFakeTaskView(boolean toOverviewFirst, @Nullable Runnable onEndRunnable) {
+        hideFeedback();
+        hideHandCoachingAnimation();
+        cancelRunningAnimation();
+        PendingAnimation anim = new PendingAnimation(300);
+        AnimatorListenerAdapter resetTaskView = new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation, boolean isReverse) {
+                mFakeTaskView.setVisibility(View.INVISIBLE);
+                mFakeTaskView.setAlpha(1);
+                mRunningWindowAnim = null;
+            }
+        };
+        if (toOverviewFirst) {
+            anim.setFloat(mViewSwipeUpAnimation.getCurrentShift(), AnimatedFloat.VALUE, 1, ACCEL);
+            anim.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation, boolean isReverse) {
+                    PendingAnimation fadeAnim = new PendingAnimation(300);
+                    fadeAnim.setViewAlpha(mFakeTaskView, 0, ACCEL);
+                    fadeAnim.addListener(resetTaskView);
+                    AnimatorSet animset = fadeAnim.buildAnim();
+                    animset.setStartDelay(100);
+                    animset.start();
+                    mRunningWindowAnim = RunningWindowAnim.wrap(animset);
+                }
+            });
+        } else {
+            anim.setViewAlpha(mFakeTaskView, 0, ACCEL);
+            anim.addListener(resetTaskView);
+        }
+        if (onEndRunnable != null) {
+            anim.addListener(AnimationSuccessListener.forRunnable(onEndRunnable));
+        }
+        AnimatorSet animset = anim.buildAnim();
+        animset.start();
+        mRunningWindowAnim = RunningWindowAnim.wrap(animset);
+    }
+
+    void animateFakeTaskViewHome(PointF finalVelocity, @Nullable Runnable onEndRunnable) {
+        hideFeedback();
+        hideHandCoachingAnimation();
+        cancelRunningAnimation();
+        RectFSpringAnim rectAnim =
+                mViewSwipeUpAnimation.handleSwipeUpToHome(finalVelocity);
+        // After home animation finishes, fade out and run onEndRunnable.
+        rectAnim.addAnimatorListener(AnimationSuccessListener.forRunnable(
+                () -> fadeOutFakeTaskView(false, onEndRunnable)));
+        mRunningWindowAnim = RunningWindowAnim.wrap(rectAnim);
+    }
+
+    @Override
+    public void setNavBarGestureProgress(@Nullable Float displacement) {
+        if (displacement == null || mTutorialType == HOME_NAVIGATION_COMPLETE
+                || mTutorialType == OVERVIEW_NAVIGATION_COMPLETE) {
+            mFakeTaskView.setVisibility(View.INVISIBLE);
+        } else {
+            mFakeTaskView.setVisibility(View.VISIBLE);
+            if (mRunningWindowAnim == null) {
+                mViewSwipeUpAnimation.updateDisplacement(displacement);
+            }
+        }
+    }
+
+    class ViewSwipeUpAnimation extends SwipeUpAnimationLogic {
+
+        ViewSwipeUpAnimation(Context context, RecentsAnimationDeviceState deviceState,
+                             GestureState gestureState) {
+            super(context, deviceState, gestureState, new FakeTransformParams());
+        }
+
+        void initDp(DeviceProfile dp) {
+            initTransitionEndpoints(dp);
+            mTaskViewSimulator.setPreviewBounds(
+                    new Rect(0, 0, dp.widthPx, dp.heightPx), dp.getInsets());
+        }
+
+        @Override
+        public void updateFinalShift() {
+            float progress = mCurrentShift.value / mDragLengthFactor;
+            mWindowTransitionController.setPlayFraction(progress);
+            mTaskViewSimulator.apply(mTransformParams);
+        }
+
+        AnimatedFloat getCurrentShift() {
+            return mCurrentShift;
+        }
+
+        RectFSpringAnim handleSwipeUpToHome(PointF velocity) {
+            PointF velocityPxPerMs = new PointF(velocity.x, velocity.y);
+            float currentShift = mCurrentShift.value;
+            final float startShift = Utilities.boundToRange(currentShift - velocityPxPerMs.y
+                    * getSingleFrameMs(mContext) / mTransitionDragLength, 0, mDragLengthFactor);
+            float distanceToTravel = (1 - currentShift) * mTransitionDragLength;
+
+            // we want the page's snap velocity to approximately match the velocity at
+            // which the user flings, so we scale the duration by a value near to the
+            // derivative of the scroll interpolator at zero, ie. 2.
+            long baseDuration = Math.round(Math.abs(distanceToTravel / velocityPxPerMs.y));
+            long duration = Math.min(MAX_SWIPE_DURATION, 2 * baseDuration);
+            HomeAnimationFactory homeAnimFactory = new HomeAnimationFactory(null) {
+                @Override
+                public AnimatorPlaybackController createActivityAnimationToHome() {
+                    return AnimatorPlaybackController.wrap(new AnimatorSet(), duration);
+                }
+
+                @NonNull
+                @Override
+                public RectF getWindowTargetRect() {
+                    int fakeHomeIconSizePx = mDp.allAppsIconSizePx;
+                    int fakeHomeIconLeft = (mDp.widthPx - fakeHomeIconSizePx) / 2;
+                    int fakeHomeIconTop = mDp.heightPx - (mDp.allAppsCellHeightPx * 3);
+                    return new RectF(fakeHomeIconLeft, fakeHomeIconTop,
+                            fakeHomeIconLeft + fakeHomeIconSizePx,
+                            fakeHomeIconTop + fakeHomeIconSizePx);
+                }
+            };
+            RectFSpringAnim windowAnim = createWindowAnimationToHome(startShift, homeAnimFactory);
+            windowAnim.start(mContext, velocityPxPerMs);
+            return windowAnim;
+        }
+    }
+
+    private class FakeTransformParams extends TransformParams {
+
+        @Override
+        public SurfaceParams[] createSurfaceParams(BuilderProxy proxy) {
+            SurfaceParams.Builder builder = new SurfaceParams.Builder((SurfaceControl) null);
+            proxy.onBuildTargetParams(builder, null, this);
+            return new SurfaceParams[] {builder.build()};
+        }
+
+        @Override
+        public void applySurfaceParams(SurfaceParams[] params) {
+            SurfaceParams p = params[0];
+            mFakeTaskView.setAnimationMatrix(p.matrix);
+            mFakeTaskViewRect.set(p.windowCrop);
+            mFakeTaskViewRadius = p.cornerRadius;
+            mFakeTaskView.invalidateOutline();
+        }
+    }
+}
diff --git a/quickstep/src/com/android/quickstep/interaction/TutorialController.java b/quickstep/src/com/android/quickstep/interaction/TutorialController.java
index f27d500..511c8b6 100644
--- a/quickstep/src/com/android/quickstep/interaction/TutorialController.java
+++ b/quickstep/src/com/android/quickstep/interaction/TutorialController.java
@@ -140,6 +140,9 @@
     void onActionTextButtonClicked(View button) {}
 
     void showHandCoachingAnimation() {
+        if (isComplete()) {
+            return;
+        }
         mHandCoachingAnimation.startLoopedAnimation(mTutorialType);
     }
 
@@ -153,6 +156,12 @@
         hideFeedback();
         updateTitles();
         updateActionButtons();
+
+        if (isComplete()) {
+            hideHandCoachingAnimation();
+        } else {
+            showHandCoachingAnimation();
+        }
     }
 
     private void updateTitles() {
@@ -190,12 +199,20 @@
         button.setOnClickListener(listener);
     }
 
+    private boolean isComplete() {
+        return mTutorialType == TutorialType.BACK_NAVIGATION_COMPLETE
+                || mTutorialType == TutorialType.HOME_NAVIGATION_COMPLETE
+                || mTutorialType == TutorialType.OVERVIEW_NAVIGATION_COMPLETE;
+    }
+
     /** Denotes the type of the tutorial. */
     enum TutorialType {
         RIGHT_EDGE_BACK_NAVIGATION,
         LEFT_EDGE_BACK_NAVIGATION,
         BACK_NAVIGATION_COMPLETE,
         HOME_NAVIGATION,
-        HOME_NAVIGATION_COMPLETE
+        HOME_NAVIGATION_COMPLETE,
+        OVERVIEW_NAVIGATION,
+        OVERVIEW_NAVIGATION_COMPLETE
     }
 }
diff --git a/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java b/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java
index a3881cf..da6815d 100644
--- a/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java
+++ b/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java
@@ -68,6 +68,9 @@
             case HOME_NAVIGATION:
             case HOME_NAVIGATION_COMPLETE:
                 return new HomeGestureTutorialFragment();
+            case OVERVIEW_NAVIGATION:
+            case OVERVIEW_NAVIGATION_COMPLETE:
+                return new OverviewGestureTutorialFragment();
             default:
                 Log.e(LOG_TAG, "Failed to find an appropriate fragment for " + tutorialType.name());
         }
diff --git a/src/com/android/launcher3/settings/DeveloperOptionsFragment.java b/src/com/android/launcher3/settings/DeveloperOptionsFragment.java
index 5bf9173..e80ee2c 100644
--- a/src/com/android/launcher3/settings/DeveloperOptionsFragment.java
+++ b/src/com/android/launcher3/settings/DeveloperOptionsFragment.java
@@ -237,6 +237,15 @@
             return true;
         });
         sandboxCategory.addPreference(launchHomeTutorialPreference);
+        Preference launchOverviewTutorialPreference = new Preference(context);
+        launchOverviewTutorialPreference.setKey("launchOverviewTutorial");
+        launchOverviewTutorialPreference.setTitle("Launch Overview Tutorial");
+        launchOverviewTutorialPreference.setSummary("Learn how to use the Overview gesture");
+        launchOverviewTutorialPreference.setOnPreferenceClickListener(preference -> {
+            startActivity(launchSandboxIntent.putExtra("tutorial_type", "OVERVIEW_NAVIGATION"));
+            return true;
+        });
+        sandboxCategory.addPreference(launchOverviewTutorialPreference);
     }
 
     private String toName(String action) {