diff --git a/packages/SystemUI/ktfmt_includes.txt b/packages/SystemUI/ktfmt_includes.txt
index 006fc09..31df2ba 100644
--- a/packages/SystemUI/ktfmt_includes.txt
+++ b/packages/SystemUI/ktfmt_includes.txt
@@ -292,6 +292,7 @@
 -packages/SystemUI/src/com/android/systemui/statusbar/events/SystemEventCoordinator.kt
 -packages/SystemUI/src/com/android/systemui/statusbar/events/SystemStatusAnimationScheduler.kt
 -packages/SystemUI/src/com/android/systemui/statusbar/events/SystemStatusAnimationSchedulerImpl.kt
+-packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventDetector.kt
 -packages/SystemUI/src/com/android/systemui/statusbar/gesture/GenericGestureDetector.kt
 -packages/SystemUI/src/com/android/systemui/statusbar/gesture/SwipeUpGestureHandler.kt
 -packages/SystemUI/src/com/android/systemui/statusbar/gesture/SwipeUpGestureLogger.kt
diff --git a/packages/SystemUI/src/com/android/systemui/dagger/SystemUICoreStartableModule.kt b/packages/SystemUI/src/com/android/systemui/dagger/SystemUICoreStartableModule.kt
index d9665c5b5..aa0977a 100644
--- a/packages/SystemUI/src/com/android/systemui/dagger/SystemUICoreStartableModule.kt
+++ b/packages/SystemUI/src/com/android/systemui/dagger/SystemUICoreStartableModule.kt
@@ -49,6 +49,7 @@
 import com.android.systemui.settings.dagger.MultiUserUtilsModule
 import com.android.systemui.shortcut.ShortcutKeyDispatcher
 import com.android.systemui.statusbar.ImmersiveModeConfirmation
+import com.android.systemui.statusbar.gesture.GesturePointerEventListener
 import com.android.systemui.statusbar.notification.InstantAppNotifier
 import com.android.systemui.statusbar.phone.KeyguardLiftController
 import com.android.systemui.statusbar.phone.LockscreenWallpaper
@@ -181,6 +182,12 @@
     @ClassKey(ScreenDecorations::class)
     abstract fun bindScreenDecorations(sysui: ScreenDecorations): CoreStartable
 
+    /** Inject into GesturePointerEventHandler. */
+    @Binds
+    @IntoMap
+    @ClassKey(GesturePointerEventListener::class)
+    abstract fun bindGesturePointerEventListener(sysui: GesturePointerEventListener): CoreStartable
+
     /** Inject into SessionTracker.  */
     @Binds
     @IntoMap
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventDetector.kt b/packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventDetector.kt
new file mode 100644
index 0000000..b34c3ac
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventDetector.kt
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2023 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.systemui.statusbar.gesture
+
+import android.content.Context
+import android.view.InputEvent
+import android.view.MotionEvent
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.settings.DisplayTracker
+import javax.inject.Inject
+
+/**
+ * A class to detect when a motion event happens. To be notified when the event is detected, add a
+ * callback via [addOnGestureDetectedCallback].
+ */
+@SysUISingleton
+class GesturePointerEventDetector @Inject constructor(
+        private val context: Context,
+        displayTracker: DisplayTracker
+) : GenericGestureDetector(
+        GesturePointerEventDetector::class.simpleName!!,
+        displayTracker.defaultDisplayId
+) {
+    override fun onInputEvent(ev: InputEvent) {
+        if (ev !is MotionEvent) {
+            return
+        }
+        // Pass all events to [gestureDetector], which will then notify [gestureListener] when a tap
+        // is detected.
+        onGestureDetected(ev)
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventListener.kt b/packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventListener.kt
new file mode 100644
index 0000000..8505c5f
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/gesture/GesturePointerEventListener.kt
@@ -0,0 +1,504 @@
+/*
+ * Copyright (C) 2023 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.systemui.statusbar.gesture
+
+import android.content.Context
+import android.graphics.Rect
+import android.graphics.Region
+import android.hardware.display.DisplayManagerGlobal
+import android.os.Handler
+import android.os.Looper
+import android.os.SystemClock
+import android.util.Log
+import android.view.DisplayCutout
+import android.view.DisplayInfo
+import android.view.GestureDetector
+import android.view.InputDevice
+import android.view.InputEvent
+import android.view.MotionEvent
+import android.view.MotionEvent.AXIS_GESTURE_SWIPE_FINGER_COUNT
+import android.view.MotionEvent.CLASSIFICATION_MULTI_FINGER_SWIPE
+import android.view.ViewRootImpl.CLIENT_TRANSIENT
+import android.widget.OverScroller
+import com.android.internal.R
+import com.android.systemui.CoreStartable
+import java.io.PrintWriter
+import javax.inject.Inject
+
+/**
+ * Watches for gesture events that may trigger system bar related events and notify the registered
+ * callbacks. Add callback to this listener by calling {@link setCallbacks}.
+ */
+class GesturePointerEventListener
+@Inject
+constructor(context: Context, gestureDetector: GesturePointerEventDetector) : CoreStartable {
+    private val mContext: Context
+    private val mHandler = Handler(Looper.getMainLooper())
+    private var mGestureDetector: GesturePointerEventDetector
+    private var mFlingGestureDetector: GestureDetector? = null
+    private var mDisplayCutoutTouchableRegionSize = 0
+
+    // The thresholds for each edge of the display
+    private val mSwipeStartThreshold = Rect()
+    private var mSwipeDistanceThreshold = 0
+    private var mCallbacks: Callbacks? = null
+    private val mDownPointerId = IntArray(MAX_TRACKED_POINTERS)
+    private val mDownX = FloatArray(MAX_TRACKED_POINTERS)
+    private val mDownY = FloatArray(MAX_TRACKED_POINTERS)
+    private val mDownTime = LongArray(MAX_TRACKED_POINTERS)
+    var screenHeight = 0
+    var screenWidth = 0
+    private var mDownPointers = 0
+    private var mSwipeFireable = false
+    private var mDebugFireable = false
+    private var mMouseHoveringAtLeft = false
+    private var mMouseHoveringAtTop = false
+    private var mMouseHoveringAtRight = false
+    private var mMouseHoveringAtBottom = false
+    private var mLastFlingTime: Long = 0
+
+    init {
+        mContext = checkNull("context", context)
+        mGestureDetector = checkNull("gesture detector", gestureDetector)
+        onConfigurationChanged()
+    }
+
+    override fun start() {
+        if (!CLIENT_TRANSIENT) {
+            return
+        }
+        mGestureDetector.addOnGestureDetectedCallback(TAG) { ev -> onInputEvent(ev) }
+        mGestureDetector.startGestureListening()
+
+        mFlingGestureDetector =
+            object : GestureDetector(mContext, FlingGestureDetector(), mHandler) {}
+    }
+
+    fun onDisplayInfoChanged(info: DisplayInfo) {
+        screenWidth = info.logicalWidth
+        screenHeight = info.logicalHeight
+        onConfigurationChanged()
+    }
+
+    fun onConfigurationChanged() {
+        if (!CLIENT_TRANSIENT) {
+            return
+        }
+        val r = mContext.resources
+        val defaultThreshold = r.getDimensionPixelSize(R.dimen.system_gestures_start_threshold)
+        mSwipeStartThreshold[defaultThreshold, defaultThreshold, defaultThreshold] =
+            defaultThreshold
+        mSwipeDistanceThreshold = defaultThreshold
+        val display = DisplayManagerGlobal.getInstance().getRealDisplay(mContext.displayId)
+        val displayCutout = display.cutout
+        if (displayCutout != null) {
+            // Expand swipe start threshold such that we can catch touches that just start beyond
+            // the notch area
+            mDisplayCutoutTouchableRegionSize =
+                r.getDimensionPixelSize(R.dimen.display_cutout_touchable_region_size)
+            val bounds = displayCutout.boundingRectsAll
+            if (bounds[DisplayCutout.BOUNDS_POSITION_LEFT] != null) {
+                mSwipeStartThreshold.left =
+                    Math.max(
+                        mSwipeStartThreshold.left,
+                        bounds[DisplayCutout.BOUNDS_POSITION_LEFT]!!.width() +
+                            mDisplayCutoutTouchableRegionSize
+                    )
+            }
+            if (bounds[DisplayCutout.BOUNDS_POSITION_TOP] != null) {
+                mSwipeStartThreshold.top =
+                    Math.max(
+                        mSwipeStartThreshold.top,
+                        bounds[DisplayCutout.BOUNDS_POSITION_TOP]!!.height() +
+                            mDisplayCutoutTouchableRegionSize
+                    )
+            }
+            if (bounds[DisplayCutout.BOUNDS_POSITION_RIGHT] != null) {
+                mSwipeStartThreshold.right =
+                    Math.max(
+                        mSwipeStartThreshold.right,
+                        bounds[DisplayCutout.BOUNDS_POSITION_RIGHT]!!.width() +
+                            mDisplayCutoutTouchableRegionSize
+                    )
+            }
+            if (bounds[DisplayCutout.BOUNDS_POSITION_BOTTOM] != null) {
+                mSwipeStartThreshold.bottom =
+                    Math.max(
+                        mSwipeStartThreshold.bottom,
+                        bounds[DisplayCutout.BOUNDS_POSITION_BOTTOM]!!.height() +
+                            mDisplayCutoutTouchableRegionSize
+                    )
+            }
+        }
+        if (DEBUG)
+            Log.d(
+                TAG,
+                "mSwipeStartThreshold=$mSwipeStartThreshold" +
+                    " mSwipeDistanceThreshold=$mSwipeDistanceThreshold"
+            )
+    }
+
+    fun onInputEvent(ev: InputEvent) {
+        if (ev !is MotionEvent) {
+            return
+        }
+        if (DEBUG) Log.d(TAG, "Received motion event $ev")
+        if (ev.isTouchEvent) {
+            mFlingGestureDetector?.onTouchEvent(ev)
+        }
+        when (ev.actionMasked) {
+            MotionEvent.ACTION_DOWN -> {
+                mSwipeFireable = true
+                mDebugFireable = true
+                mDownPointers = 0
+                captureDown(ev, 0)
+                if (mMouseHoveringAtLeft) {
+                    mMouseHoveringAtLeft = false
+                    mCallbacks?.onMouseLeaveFromLeft()
+                }
+                if (mMouseHoveringAtTop) {
+                    mMouseHoveringAtTop = false
+                    mCallbacks?.onMouseLeaveFromTop()
+                }
+                if (mMouseHoveringAtRight) {
+                    mMouseHoveringAtRight = false
+                    mCallbacks?.onMouseLeaveFromRight()
+                }
+                if (mMouseHoveringAtBottom) {
+                    mMouseHoveringAtBottom = false
+                    mCallbacks?.onMouseLeaveFromBottom()
+                }
+                mCallbacks?.onDown()
+            }
+            MotionEvent.ACTION_POINTER_DOWN -> {
+                captureDown(ev, ev.actionIndex)
+                if (mDebugFireable) {
+                    mDebugFireable = ev.pointerCount < 5
+                    if (!mDebugFireable) {
+                        if (DEBUG) Log.d(TAG, "Firing debug")
+                        mCallbacks?.onDebug()
+                    }
+                }
+            }
+            MotionEvent.ACTION_MOVE ->
+                if (mSwipeFireable) {
+                    val trackpadSwipe = detectTrackpadThreeFingerSwipe(ev)
+                    mSwipeFireable = trackpadSwipe == TRACKPAD_SWIPE_NONE
+                    if (!mSwipeFireable) {
+                        if (trackpadSwipe == TRACKPAD_SWIPE_FROM_TOP) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromTop from trackpad")
+                            mCallbacks?.onSwipeFromTop()
+                        } else if (trackpadSwipe == TRACKPAD_SWIPE_FROM_BOTTOM) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromBottom from trackpad")
+                            mCallbacks?.onSwipeFromBottom()
+                        } else if (trackpadSwipe == TRACKPAD_SWIPE_FROM_RIGHT) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromRight from trackpad")
+                            mCallbacks?.onSwipeFromRight()
+                        } else if (trackpadSwipe == TRACKPAD_SWIPE_FROM_LEFT) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromLeft from trackpad")
+                            mCallbacks?.onSwipeFromLeft()
+                        }
+                    } else {
+                        val swipe = detectSwipe(ev)
+                        mSwipeFireable = swipe == SWIPE_NONE
+                        if (swipe == SWIPE_FROM_TOP) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromTop")
+                            mCallbacks?.onSwipeFromTop()
+                        } else if (swipe == SWIPE_FROM_BOTTOM) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromBottom")
+                            mCallbacks?.onSwipeFromBottom()
+                        } else if (swipe == SWIPE_FROM_RIGHT) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromRight")
+                            mCallbacks?.onSwipeFromRight()
+                        } else if (swipe == SWIPE_FROM_LEFT) {
+                            if (DEBUG) Log.d(TAG, "Firing onSwipeFromLeft")
+                            mCallbacks?.onSwipeFromLeft()
+                        }
+                    }
+                }
+            MotionEvent.ACTION_HOVER_MOVE ->
+                if (ev.isFromSource(InputDevice.SOURCE_MOUSE)) {
+                    val eventX = ev.x
+                    val eventY = ev.y
+                    if (!mMouseHoveringAtLeft && eventX == 0f) {
+                        mCallbacks?.onMouseHoverAtLeft()
+                        mMouseHoveringAtLeft = true
+                    } else if (mMouseHoveringAtLeft && eventX > 0) {
+                        mCallbacks?.onMouseLeaveFromLeft()
+                        mMouseHoveringAtLeft = false
+                    }
+                    if (!mMouseHoveringAtTop && eventY == 0f) {
+                        mCallbacks?.onMouseHoverAtTop()
+                        mMouseHoveringAtTop = true
+                    } else if (mMouseHoveringAtTop && eventY > 0) {
+                        mCallbacks?.onMouseLeaveFromTop()
+                        mMouseHoveringAtTop = false
+                    }
+                    if (!mMouseHoveringAtRight && eventX >= screenWidth - 1) {
+                        mCallbacks?.onMouseHoverAtRight()
+                        mMouseHoveringAtRight = true
+                    } else if (mMouseHoveringAtRight && eventX < screenWidth - 1) {
+                        mCallbacks?.onMouseLeaveFromRight()
+                        mMouseHoveringAtRight = false
+                    }
+                    if (!mMouseHoveringAtBottom && eventY >= screenHeight - 1) {
+                        mCallbacks?.onMouseHoverAtBottom()
+                        mMouseHoveringAtBottom = true
+                    } else if (mMouseHoveringAtBottom && eventY < screenHeight - 1) {
+                        mCallbacks?.onMouseLeaveFromBottom()
+                        mMouseHoveringAtBottom = false
+                    }
+                }
+            MotionEvent.ACTION_UP,
+            MotionEvent.ACTION_CANCEL -> {
+                mSwipeFireable = false
+                mDebugFireable = false
+                mCallbacks?.onUpOrCancel()
+            }
+            else -> if (DEBUG) Log.d(TAG, "Ignoring $ev")
+        }
+    }
+
+    fun setCallbacks(callbacks: Callbacks) {
+        mCallbacks = callbacks
+    }
+
+    private fun captureDown(event: MotionEvent, pointerIndex: Int) {
+        val pointerId = event.getPointerId(pointerIndex)
+        val i = findIndex(pointerId)
+        if (DEBUG) Log.d(TAG, "pointer $pointerId down pointerIndex=$pointerIndex trackingIndex=$i")
+        if (i != UNTRACKED_POINTER) {
+            mDownX[i] = event.getX(pointerIndex)
+            mDownY[i] = event.getY(pointerIndex)
+            mDownTime[i] = event.eventTime
+            if (DEBUG)
+                Log.d(TAG, "pointer " + pointerId + " down x=" + mDownX[i] + " y=" + mDownY[i])
+        }
+    }
+
+    protected fun currentGestureStartedInRegion(r: Region): Boolean {
+        return r.contains(mDownX[0].toInt(), mDownY[0].toInt())
+    }
+
+    private fun findIndex(pointerId: Int): Int {
+        for (i in 0 until mDownPointers) {
+            if (mDownPointerId[i] == pointerId) {
+                return i
+            }
+        }
+        if (mDownPointers == MAX_TRACKED_POINTERS || pointerId == MotionEvent.INVALID_POINTER_ID) {
+            return UNTRACKED_POINTER
+        }
+        mDownPointerId[mDownPointers++] = pointerId
+        return mDownPointers - 1
+    }
+
+    private fun detectTrackpadThreeFingerSwipe(move: MotionEvent): Int {
+        if (!isTrackpadThreeFingerSwipe(move)) {
+            return TRACKPAD_SWIPE_NONE
+        }
+        val dx = move.x - mDownX[0]
+        val dy = move.y - mDownY[0]
+        if (Math.abs(dx) < Math.abs(dy)) {
+            if (Math.abs(dy) > mSwipeDistanceThreshold) {
+                return if (dy > 0) TRACKPAD_SWIPE_FROM_TOP else TRACKPAD_SWIPE_FROM_BOTTOM
+            }
+        } else {
+            if (Math.abs(dx) > mSwipeDistanceThreshold) {
+                return if (dx > 0) TRACKPAD_SWIPE_FROM_LEFT else TRACKPAD_SWIPE_FROM_RIGHT
+            }
+        }
+        return TRACKPAD_SWIPE_NONE
+    }
+
+    private fun isTrackpadThreeFingerSwipe(event: MotionEvent): Boolean {
+        return (event.classification == CLASSIFICATION_MULTI_FINGER_SWIPE &&
+            event.getAxisValue(AXIS_GESTURE_SWIPE_FINGER_COUNT) == 3f)
+    }
+    private fun detectSwipe(move: MotionEvent): Int {
+        val historySize = move.historySize
+        val pointerCount = move.pointerCount
+        for (p in 0 until pointerCount) {
+            val pointerId = move.getPointerId(p)
+            val i = findIndex(pointerId)
+            if (i != UNTRACKED_POINTER) {
+                for (h in 0 until historySize) {
+                    val time = move.getHistoricalEventTime(h)
+                    val x = move.getHistoricalX(p, h)
+                    val y = move.getHistoricalY(p, h)
+                    val swipe = detectSwipe(i, time, x, y)
+                    if (swipe != SWIPE_NONE) {
+                        return swipe
+                    }
+                }
+                val swipe = detectSwipe(i, move.eventTime, move.getX(p), move.getY(p))
+                if (swipe != SWIPE_NONE) {
+                    return swipe
+                }
+            }
+        }
+        return SWIPE_NONE
+    }
+
+    private fun detectSwipe(i: Int, time: Long, x: Float, y: Float): Int {
+        val fromX = mDownX[i]
+        val fromY = mDownY[i]
+        val elapsed = time - mDownTime[i]
+        if (DEBUG)
+            Log.d(
+                TAG,
+                "pointer " +
+                    mDownPointerId[i] +
+                    " moved (" +
+                    fromX +
+                    "->" +
+                    x +
+                    "," +
+                    fromY +
+                    "->" +
+                    y +
+                    ") in " +
+                    elapsed
+            )
+        if (
+            fromY <= mSwipeStartThreshold.top &&
+                y > fromY + mSwipeDistanceThreshold &&
+                elapsed < SWIPE_TIMEOUT_MS
+        ) {
+            return SWIPE_FROM_TOP
+        }
+        if (
+            fromY >= screenHeight - mSwipeStartThreshold.bottom &&
+                y < fromY - mSwipeDistanceThreshold &&
+                elapsed < SWIPE_TIMEOUT_MS
+        ) {
+            return SWIPE_FROM_BOTTOM
+        }
+        if (
+            fromX >= screenWidth - mSwipeStartThreshold.right &&
+                x < fromX - mSwipeDistanceThreshold &&
+                elapsed < SWIPE_TIMEOUT_MS
+        ) {
+            return SWIPE_FROM_RIGHT
+        }
+        return if (
+            fromX <= mSwipeStartThreshold.left &&
+                x > fromX + mSwipeDistanceThreshold &&
+                elapsed < SWIPE_TIMEOUT_MS
+        ) {
+            SWIPE_FROM_LEFT
+        } else SWIPE_NONE
+    }
+
+    fun dump(pw: PrintWriter, prefix: String) {
+        val inner = "$prefix  "
+        pw.println(prefix + TAG + ":")
+        pw.print(inner)
+        pw.print("mDisplayCutoutTouchableRegionSize=")
+        pw.println(mDisplayCutoutTouchableRegionSize)
+        pw.print(inner)
+        pw.print("mSwipeStartThreshold=")
+        pw.println(mSwipeStartThreshold)
+        pw.print(inner)
+        pw.print("mSwipeDistanceThreshold=")
+        pw.println(mSwipeDistanceThreshold)
+    }
+
+    private inner class FlingGestureDetector internal constructor() :
+        GestureDetector.SimpleOnGestureListener() {
+        private val mOverscroller: OverScroller = OverScroller(mContext)
+
+        override fun onSingleTapUp(e: MotionEvent): Boolean {
+            if (!mOverscroller.isFinished) {
+                mOverscroller.forceFinished(true)
+            }
+            return true
+        }
+
+        override fun onFling(
+            down: MotionEvent?,
+            up: MotionEvent,
+            velocityX: Float,
+            velocityY: Float
+        ): Boolean {
+            mOverscroller.computeScrollOffset()
+            val now = SystemClock.uptimeMillis()
+            if (mLastFlingTime != 0L && now > mLastFlingTime + MAX_FLING_TIME_MILLIS) {
+                mOverscroller.forceFinished(true)
+            }
+            mOverscroller.fling(
+                0,
+                0,
+                velocityX.toInt(),
+                velocityY.toInt(),
+                Int.MIN_VALUE,
+                Int.MAX_VALUE,
+                Int.MIN_VALUE,
+                Int.MAX_VALUE
+            )
+            var duration = mOverscroller.duration
+            if (duration > MAX_FLING_TIME_MILLIS) {
+                duration = MAX_FLING_TIME_MILLIS
+            }
+            mLastFlingTime = now
+            mCallbacks?.onFling(duration)
+            return true
+        }
+    }
+
+    interface Callbacks {
+        fun onSwipeFromTop()
+        fun onSwipeFromBottom()
+        fun onSwipeFromRight()
+        fun onSwipeFromLeft()
+        fun onFling(durationMs: Int)
+        fun onDown()
+        fun onUpOrCancel()
+        fun onMouseHoverAtLeft()
+        fun onMouseHoverAtTop()
+        fun onMouseHoverAtRight()
+        fun onMouseHoverAtBottom()
+        fun onMouseLeaveFromLeft()
+        fun onMouseLeaveFromTop()
+        fun onMouseLeaveFromRight()
+        fun onMouseLeaveFromBottom()
+        fun onDebug()
+    }
+
+    companion object {
+        private const val TAG = "GesturePointerEventHandler"
+        private const val DEBUG = false
+        private const val SWIPE_TIMEOUT_MS: Long = 500
+        private const val MAX_TRACKED_POINTERS = 32 // max per input system
+        private const val UNTRACKED_POINTER = -1
+        private const val MAX_FLING_TIME_MILLIS = 5000
+        private const val SWIPE_NONE = 0
+        private const val SWIPE_FROM_TOP = 1
+        private const val SWIPE_FROM_BOTTOM = 2
+        private const val SWIPE_FROM_RIGHT = 3
+        private const val SWIPE_FROM_LEFT = 4
+        private const val TRACKPAD_SWIPE_NONE = 0
+        private const val TRACKPAD_SWIPE_FROM_TOP = 1
+        private const val TRACKPAD_SWIPE_FROM_BOTTOM = 2
+        private const val TRACKPAD_SWIPE_FROM_RIGHT = 3
+        private const val TRACKPAD_SWIPE_FROM_LEFT = 4
+
+        private fun <T> checkNull(name: String, arg: T?): T {
+            requireNotNull(arg) { "$name must not be null" }
+            return arg
+        }
+    }
+}