am 82e4373e: Merge "Use touch pad gestures to manipulate the pointer. (DO NOT MERGE)" into honeycomb-mr2

* commit '82e4373ed3775395a23d161e58c003e82511921a':
  Use touch pad gestures to manipulate the pointer. (DO NOT MERGE)

include/ui/Input.h

@@ -27,6 +27,7 @@
 #include <utils/Timers.h>
 #include <utils/RefBase.h>
 #include <utils/String8.h>
+#include <utils/BitSet.h>
 
 #ifdef HAVE_ANDROID_OS
 class SkMatrix;
@@ -210,6 +211,13 @@ struct PointerCoords {
     status_t writeToParcel(Parcel* parcel) const;
 #endif
 
+    bool operator==(const PointerCoords& other) const;
+    inline bool operator!=(const PointerCoords& other) const {
+        return !(*this == other);
+    }
+
+    void copyFrom(const PointerCoords& other);
+
 private:
     void tooManyAxes(int axis);
 };
@@ -544,6 +552,53 @@ private:
     MotionEvent mMotionEvent;
 };
 
+/*
+ * Calculates the velocity of pointer motions over time.
+ * Uses essentially the same algorithm as android.view.VelocityTracker.
+ */
+class VelocityTracker {
+public:
+    struct Position {
+        float x, y;
+    };
+
+    VelocityTracker();
+
+    // Resets the velocity tracker state.
+    void clear();
+
+    // Adds movement information for a set of pointers.
+    // The idBits bitfield specifies the pointer ids of the pointers whose positions
+    // are included in the movement.
+    // The positions array contains position information for each pointer in order by
+    // increasing id.  Its size should be equal to the number of one bits in idBits.
+    void addMovement(nsecs_t eventTime, BitSet32 idBits, const Position* positions);
+
+    // Gets the velocity of the specified pointer id in position units per second.
+    // Returns false and sets the velocity components to zero if there is no movement
+    // information for the pointer.
+    bool getVelocity(uint32_t id, float* outVx, float* outVy) const;
+
+private:
+    // Number of samples to keep.
+    static const uint32_t HISTORY_SIZE = 10;
+
+    // Oldest sample to consider when calculating the velocity.
+    static const nsecs_t MAX_AGE = 200 * 1000000; // 200 ms
+
+    // The minimum duration between samples when estimating velocity.
+    static const nsecs_t MIN_DURATION = 5 * 1000000; // 5 ms
+
+    struct Movement {
+        nsecs_t eventTime;
+        BitSet32 idBits;
+        Position positions[MAX_POINTERS];
+    };
+
+    uint32_t mIndex;
+    Movement mMovements[HISTORY_SIZE];
+};
+
 /*
  * Describes the characteristics and capabilities of an input device.
  */

include/utils/BitSet.h

@@ -61,6 +61,12 @@ struct BitSet32 {
     // Result is undefined if all bits are marked.
     inline uint32_t firstUnmarkedBit() const { return __builtin_clz(~ value); }
 
+    // Gets the index of the specified bit in the set, which is the number of
+    // marked bits that appear before the specified bit.
+    inline uint32_t getIndexOfBit(uint32_t n) const {
+        return __builtin_popcount(value & ~(0xffffffffUL >> n));
+    }
+
     inline bool operator== (const BitSet32& other) const { return value == other.value; }
     inline bool operator!= (const BitSet32& other) const { return value != other.value; }
 };

libs/ui/Input.cpp

@@ -7,8 +7,12 @@
 
 //#define LOG_NDEBUG 0
 
+// Log debug messages about keymap probing.
 #define DEBUG_PROBE 0
 
+// Log debug messages about velocity tracking.
+#define DEBUG_VELOCITY 0
+
 #include <stdlib.h>
 #include <unistd.h>
 #include <ctype.h>
@@ -347,6 +351,27 @@ void PointerCoords::tooManyAxes(int axis) {
             "cannot contain more than %d axis values.", axis, int(MAX_AXES));
 }
 
+bool PointerCoords::operator==(const PointerCoords& other) const {
+    if (bits != other.bits) {
+        return false;
+    }
+    uint32_t count = __builtin_popcountll(bits);
+    for (uint32_t i = 0; i < count; i++) {
+        if (values[i] != other.values[i]) {
+            return false;
+        }
+    }
+    return true;
+}
+
+void PointerCoords::copyFrom(const PointerCoords& other) {
+    bits = other.bits;
+    uint32_t count = __builtin_popcountll(bits);
+    for (uint32_t i = 0; i < count; i++) {
+        values[i] = other.values[i];
+    }
+}
+
 
 // --- MotionEvent ---
 
@@ -633,6 +658,135 @@ bool MotionEvent::isTouchEvent(int32_t source, int32_t action) {
 }
 
 
+// --- VelocityTracker ---
+
+VelocityTracker::VelocityTracker() {
+    clear();
+}
+
+void VelocityTracker::clear() {
+    mIndex = 0;
+    mMovements[0].idBits.clear();
+}
+
+void VelocityTracker::addMovement(nsecs_t eventTime, BitSet32 idBits, const Position* positions) {
+    if (++mIndex == HISTORY_SIZE) {
+        mIndex = 0;
+    }
+    Movement& movement = mMovements[mIndex];
+    movement.eventTime = eventTime;
+    movement.idBits = idBits;
+    uint32_t count = idBits.count();
+    for (uint32_t i = 0; i < count; i++) {
+        movement.positions[i] = positions[i];
+    }
+
+#if DEBUG_VELOCITY
+    LOGD("VelocityTracker: addMovement eventTime=%lld, idBits=0x%08x", eventTime, idBits.value);
+    for (BitSet32 iterBits(idBits); !iterBits.isEmpty(); ) {
+        uint32_t id = iterBits.firstMarkedBit();
+        uint32_t index = idBits.getIndexOfBit(id);
+        iterBits.clearBit(id);
+        float vx, vy;
+        bool available = getVelocity(id, &vx, &vy);
+        if (available) {
+            LOGD("  %d: position (%0.3f, %0.3f), velocity (%0.3f, %0.3f), speed %0.3f",
+                    id, positions[index].x, positions[index].y, vx, vy, sqrtf(vx * vx + vy * vy));
+        } else {
+            assert(vx == 0 && vy == 0);
+            LOGD("  %d: position (%0.3f, %0.3f), velocity not available",
+                    id, positions[index].x, positions[index].y);
+        }
+    }
+#endif
+}
+
+bool VelocityTracker::getVelocity(uint32_t id, float* outVx, float* outVy) const {
+    const Movement& newestMovement = mMovements[mIndex];
+    if (newestMovement.idBits.hasBit(id)) {
+        // Find the oldest sample that contains the pointer and that is not older than MAX_AGE.
+        nsecs_t minTime = newestMovement.eventTime - MAX_AGE;
+        uint32_t oldestIndex = mIndex;
+        uint32_t numTouches = 1;
+        do {
+            uint32_t nextOldestIndex = (oldestIndex == 0 ? HISTORY_SIZE : oldestIndex) - 1;
+            const Movement& nextOldestMovement = mMovements[nextOldestIndex];
+            if (!nextOldestMovement.idBits.hasBit(id)
+                    || nextOldestMovement.eventTime < minTime) {
+                break;
+            }
+            oldestIndex = nextOldestIndex;
+        } while (++numTouches < HISTORY_SIZE);
+
+        // If we have a lot of samples, skip the last received sample since it is
+        // probably pretty noisy compared to the sum of all of the traces already acquired.
+        //
+        // NOTE: This condition exists in the android.view.VelocityTracker and imposes a
+        // bias against the most recent data.
+        if (numTouches > 3) {
+            numTouches -= 1;
+        }
+
+        // Calculate an exponentially weighted moving average of the velocity at different
+        // points in time measured relative to the oldest samples.  This is essentially
+        // an IIR filter.
+        //
+        // One problem with this algorithm is that the sample data may be poorly conditioned.
+        // Sometimes samples arrive very close together in time which can cause us to
+        // overestimate the velocity at that time point.  Most samples might be measured
+        // 16ms apart but some consecutive samples could be only 0.5sm apart due to
+        // the way they are reported by the hardware or driver (sometimes in bursts or with
+        // significant jitter).  The instantaneous velocity for those samples 0.5ms apart will
+        // be calculated to be 32 times what it should have been.
+        // To work around this effect, we impose a minimum duration on the samples.
+        //
+        // FIXME: Samples close together in time can have an disproportionately large
+        // impact on the result because all samples are equally weighted.  The average should
+        // instead take the time factor into account.
+        //
+        // FIXME: The minimum duration condition does not exist in
+        // android.view.VelocityTracker yet.  It is less important there because sample times
+        // are truncated to the millisecond so back to back samples will often appear to be
+        // zero milliseconds apart and will be ignored if they are the oldest ones.
+        float accumVx = 0;
+        float accumVy = 0;
+        uint32_t index = oldestIndex;
+        uint32_t samplesUsed = 0;
+        const Movement& oldestMovement = mMovements[oldestIndex];
+        const Position& oldestPosition =
+                oldestMovement.positions[oldestMovement.idBits.getIndexOfBit(id)];
+        while (numTouches-- > 1) {
+            if (++index == HISTORY_SIZE) {
+                index = 0;
+            }
+            const Movement& movement = mMovements[index];
+            nsecs_t duration = movement.eventTime - oldestMovement.eventTime;
+            if (duration > MIN_DURATION) {
+                const Position& position = movement.positions[movement.idBits.getIndexOfBit(id)];
+                float scale = 1000000000.0f / duration; // one over time delta in seconds
+                float vx = (position.x - oldestPosition.x) * scale;
+                float vy = (position.y - oldestPosition.y) * scale;
+                accumVx = accumVx == 0 ? vx : (accumVx + vx) * 0.5f;
+                accumVy = accumVy == 0 ? vy : (accumVy + vy) * 0.5f;
+                samplesUsed += 1;
+            }
+        }
+
+        // Make sure we used at least one sample.
+        if (samplesUsed != 0) {
+            *outVx = accumVx;
+            *outVy = accumVy;
+            return true;
+        }
+    }
+
+    // No data available for this pointer.
+    *outVx = 0;
+    *outVy = 0;
+    return false;
+}
+
+
 // --- InputDeviceInfo ---
 
 InputDeviceInfo::InputDeviceInfo() {

libs/ui/InputTransport.cpp

@@ -406,7 +406,7 @@ status_t InputPublisher::publishMotionEvent(
 
     for (size_t i = 0; i < pointerCount; i++) {
         mSharedMessage->motion.pointerIds[i] = pointerIds[i];
-        mSharedMessage->motion.sampleData[0].coords[i] = pointerCoords[i];
+        mSharedMessage->motion.sampleData[0].coords[i].copyFrom(pointerCoords[i]);
     }
 
     // Cache essential information about the motion event to ensure that a malicious consumer
@@ -475,7 +475,7 @@ status_t InputPublisher::appendMotionSample(
 
     mMotionEventSampleDataTail->eventTime = eventTime;
     for (size_t i = 0; i < mMotionEventPointerCount; i++) {
-        mMotionEventSampleDataTail->coords[i] = pointerCoords[i];
+        mMotionEventSampleDataTail->coords[i].copyFrom(pointerCoords[i]);
     }
     mMotionEventSampleDataTail = newTail;
 

services/input/InputDispatcher.cpp

@@ -2178,8 +2178,8 @@ InputDispatcher::splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet
         if (pointerIds.hasBit(pointerId)) {
             splitPointerIndexMap[splitPointerCount] = originalPointerIndex;
             splitPointerIds[splitPointerCount] = pointerId;
-            splitPointerCoords[splitPointerCount] =
+            splitPointerCoords[splitPointerCount].copyFrom(
-                    originalMotionEntry->firstSample.pointerCoords[originalPointerIndex];
+                    originalMotionEntry->firstSample.pointerCoords[originalPointerIndex]);
             splitPointerCount += 1;
         }
     }
@@ -2242,8 +2242,8 @@ InputDispatcher::splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet
         for (uint32_t splitPointerIndex = 0; splitPointerIndex < splitPointerCount;
                 splitPointerIndex++) {
             uint32_t originalPointerIndex = splitPointerIndexMap[splitPointerIndex];
-            splitPointerCoords[splitPointerIndex] =
+            splitPointerCoords[splitPointerIndex].copyFrom(
-                    originalMotionSample->pointerCoords[originalPointerIndex];
+                    originalMotionSample->pointerCoords[originalPointerIndex]);
         }
 
         mAllocator.appendMotionSample(splitMotionEntry, originalMotionSample->eventTime,
@@ -3497,7 +3497,7 @@ InputDispatcher::MotionEntry* InputDispatcher::Allocator::obtainMotionEntry(nsec
     entry->lastSample = & entry->firstSample;
     for (uint32_t i = 0; i < pointerCount; i++) {
         entry->pointerIds[i] = pointerIds[i];
-        entry->firstSample.pointerCoords[i] = pointerCoords[i];
+        entry->firstSample.pointerCoords[i].copyFrom(pointerCoords[i]);
     }
     return entry;
 }
@@ -3601,7 +3601,7 @@ void InputDispatcher::Allocator::appendMotionSample(MotionEntry* motionEntry,
     sample->eventTime = eventTime;
     uint32_t pointerCount = motionEntry->pointerCount;
     for (uint32_t i = 0; i < pointerCount; i++) {
-        sample->pointerCoords[i] = pointerCoords[i];
+        sample->pointerCoords[i].copyFrom(pointerCoords[i]);
     }
 
     sample->next = NULL;
@@ -3738,7 +3738,7 @@ void InputDispatcher::InputState::MotionMemento::setPointers(const MotionEntry*
     pointerCount = entry->pointerCount;
     for (uint32_t i = 0; i < entry->pointerCount; i++) {
         pointerIds[i] = entry->pointerIds[i];
-        pointerCoords[i] = entry->lastSample->pointerCoords[i];
+        pointerCoords[i].copyFrom(entry->lastSample->pointerCoords[i]);
     }
 }
 

services/input/InputReader.h

@@ -558,6 +558,8 @@ public:
     virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
             const int32_t* keyCodes, uint8_t* outFlags);
 
+    virtual void fadePointer();
+
 protected:
     Mutex mLock;
 
@@ -611,10 +613,12 @@ protected:
         PointerData pointers[MAX_POINTERS];
         BitSet32 idBits;
         uint32_t idToIndex[MAX_POINTER_ID + 1];
+        uint32_t buttonState;
 
         void copyFrom(const TouchData& other) {
             pointerCount = other.pointerCount;
             idBits = other.idBits;
+            buttonState = other.buttonState;
 
             for (uint32_t i = 0; i < pointerCount; i++) {
                 pointers[i] = other.pointers[i];
@@ -627,17 +631,20 @@ protected:
         inline void clear() {
             pointerCount = 0;
             idBits.clear();
+            buttonState = 0;
         }
     };
 
     // Input sources supported by the device.
     uint32_t mTouchSource; // sources when reporting touch data
+    uint32_t mPointerSource; // sources when reporting pointer gestures
 
     // Immutable configuration parameters.
     struct Parameters {
         enum DeviceType {
             DEVICE_TYPE_TOUCH_SCREEN,
             DEVICE_TYPE_TOUCH_PAD,
+            DEVICE_TYPE_POINTER,
         };
 
         DeviceType deviceType;
@@ -735,11 +742,17 @@ protected:
 
     // Current and previous touch sample data.
     TouchData mCurrentTouch;
+    PointerCoords mCurrentTouchCoords[MAX_POINTERS];
+
     TouchData mLastTouch;
+    PointerCoords mLastTouchCoords[MAX_POINTERS];
 
     // The time the primary pointer last went down.
     nsecs_t mDownTime;
 
+    // The pointer controller, or null if the device is not a pointer.
+    sp<PointerControllerInterface> mPointerController;
+
     struct LockedState {
         Vector<VirtualKey> virtualKeys;
 
@@ -804,6 +817,17 @@ protected:
             int32_t keyCode;
             int32_t scanCode;
         } currentVirtualKey;
+
+        // Scale factor for gesture based pointer movements.
+        float pointerGestureXMovementScale;
+        float pointerGestureYMovementScale;
+
+        // Scale factor for gesture based zooming and other freeform motions.
+        float pointerGestureXZoomScale;
+        float pointerGestureYZoomScale;
+
+        // The maximum swipe width squared.
+        int32_t pointerGestureMaxSwipeWidthSquared;
     } mLocked;
 
     virtual void configureParameters();
@@ -869,13 +893,148 @@ private:
         uint64_t distance : 48; // squared distance
     };
 
+    struct PointerGesture {
+        enum Mode {
+            // No fingers, button is not pressed.
+            // Nothing happening.
+            NEUTRAL,
+
+            // No fingers, button is not pressed.
+            // Tap detected.
+            // Emits DOWN and UP events at the pointer location.
+            TAP,
+
+            // Button is pressed.
+            // Pointer follows the active finger if there is one.  Other fingers are ignored.
+            // Emits DOWN, MOVE and UP events at the pointer location.
+            CLICK_OR_DRAG,
+
+            // Exactly one finger, button is not pressed.
+            // Pointer follows the active finger.
+            // Emits HOVER_MOVE events at the pointer location.
+            HOVER,
+
+            // More than two fingers involved but they haven't moved enough for us
+            // to figure out what is intended.
+            INDETERMINATE_MULTITOUCH,
+
+            // Exactly two fingers moving in the same direction, button is not pressed.
+            // Pointer does not move.
+            // Emits DOWN, MOVE and UP events with a single pointer coordinate that
+            // follows the midpoint between both fingers.
+            // The centroid is fixed when entering this state.
+            SWIPE,
+
+            // Two or more fingers moving in arbitrary directions, button is not pressed.
+            // Pointer does not move.
+            // Emits DOWN, POINTER_DOWN, MOVE, POINTER_UP and UP events that follow
+            // each finger individually relative to the initial centroid of the finger.
+            // The centroid is fixed when entering this state.
+            FREEFORM,
+
+            // Waiting for quiet time to end before starting the next gesture.
+            QUIET,
+        };
+
+        // The active pointer id from the raw touch data.
+        int32_t activeTouchId; // -1 if none
+
+        // The active pointer id from the gesture last delivered to the application.
+        int32_t activeGestureId; // -1 if none
+
+        // Pointer coords and ids for the current and previous pointer gesture.
+        Mode currentGestureMode;
+        uint32_t currentGesturePointerCount;
+        BitSet32 currentGestureIdBits;
+        uint32_t currentGestureIdToIndex[MAX_POINTER_ID + 1];
+        PointerCoords currentGestureCoords[MAX_POINTERS];
+
+        Mode lastGestureMode;
+        uint32_t lastGesturePointerCount;
+        BitSet32 lastGestureIdBits;
+        uint32_t lastGestureIdToIndex[MAX_POINTER_ID + 1];
+        PointerCoords lastGestureCoords[MAX_POINTERS];
+
+        // Tracks for all pointers originally went down.
+        TouchData touchOrigin;
+
+        // Describes how touch ids are mapped to gesture ids for freeform gestures.
+        uint32_t freeformTouchToGestureIdMap[MAX_POINTER_ID + 1];
+
+        // Initial centroid of the movement.
+        // Used to calculate how far the touch pointers have moved since the gesture started.
+        int32_t initialCentroidX;
+        int32_t initialCentroidY;
+
+        // Initial pointer location.
+        // Used to track where the pointer was when the gesture started.
+        float initialPointerX;
+        float initialPointerY;
+
+        // Time the pointer gesture last went down.
+        nsecs_t downTime;
+
+        // Time we started waiting for a tap gesture.
+        nsecs_t tapTime;
+
+        // Time we started waiting for quiescence.
+        nsecs_t quietTime;
+
+        // A velocity tracker for determining whether to switch active pointers during drags.
+        VelocityTracker velocityTracker;
+
+        void reset() {
+            activeTouchId = -1;
+            activeGestureId = -1;
+            currentGestureMode = NEUTRAL;
+            currentGesturePointerCount = 0;
+            currentGestureIdBits.clear();
+            lastGestureMode = NEUTRAL;
+            lastGesturePointerCount = 0;
+            lastGestureIdBits.clear();
+            touchOrigin.clear();
+            initialCentroidX = 0;
+            initialCentroidY = 0;
+            initialPointerX = 0;
+            initialPointerY = 0;
+            downTime = 0;
+            velocityTracker.clear();
+            resetTapTime();
+            resetQuietTime();
+        }
+
+        void resetTapTime() {
+            tapTime = LLONG_MIN;
+        }
+
+        void resetQuietTime() {
+            quietTime = LLONG_MIN;
+        }
+    } mPointerGesture;
+
     void initializeLocked();
 
     TouchResult consumeOffScreenTouches(nsecs_t when, uint32_t policyFlags);
     void dispatchTouches(nsecs_t when, uint32_t policyFlags);
-    void dispatchTouch(nsecs_t when, uint32_t policyFlags, TouchData* touch,
+    void prepareTouches(int32_t* outEdgeFlags, float* outXPrecision, float* outYPrecision);
-            BitSet32 idBits, uint32_t changedId, uint32_t pointerCount,
+    void dispatchPointerGestures(nsecs_t when, uint32_t policyFlags);
-            int32_t motionEventAction);
+    void preparePointerGestures(nsecs_t when,
+            bool* outCancelPreviousGesture, bool* outFinishPreviousGesture);
+
+    // Dispatches a motion event.
+    // If the changedId is >= 0 and the action is POINTER_DOWN or POINTER_UP, the
+    // method will take care of setting the index and transmuting the action to DOWN or UP
+    // it is the first / last pointer to go down / up.
+    void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
+            int32_t action, int32_t flags, uint32_t metaState, int32_t edgeFlags,
+            const PointerCoords* coords, const uint32_t* idToIndex, BitSet32 idBits,
+            int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime);
+
+    // Updates pointer coords for pointers with specified ids that have moved.
+    // Returns true if any of them changed.
+    bool updateMovedPointerCoords(const PointerCoords* inCoords, const uint32_t* inIdToIndex,
+            PointerCoords* outCoords, const uint32_t* outIdToIndex, BitSet32 idBits) const;
+
     void suppressSwipeOntoVirtualKeys(nsecs_t when);
 
     bool isPointInsideSurfaceLocked(int32_t x, int32_t y);
@@ -907,6 +1066,7 @@ private:
             FIELD_ABS_Y = 4,
             FIELD_ABS_PRESSURE = 8,
             FIELD_ABS_TOOL_WIDTH = 16,
+            FIELD_BUTTONS = 32,
         };
 
         uint32_t fields;
@@ -917,8 +1077,13 @@ private:
         int32_t absPressure;
         int32_t absToolWidth;
 
+        uint32_t buttonDown;
+        uint32_t buttonUp;
+
         inline void clear() {
             fields = 0;
+            buttonDown = 0;
+            buttonUp = 0;
         }
     } mAccumulator;
 
@@ -927,6 +1092,7 @@ private:
     int32_t mY;
     int32_t mPressure;
     int32_t mToolWidth;
+    uint32_t mButtonState;
 
     void initialize();
 
@@ -978,12 +1144,20 @@ private:
             }
         } pointers[MAX_POINTERS + 1]; // + 1 to remove the need for extra range checks
 
+        // Bitfield of buttons that went down or up.
+        uint32_t buttonDown;
+        uint32_t buttonUp;
+
         inline void clear() {
             pointerCount = 0;
             pointers[0].clear();
+            buttonDown = 0;
+            buttonUp = 0;
         }
     } mAccumulator;
 
+    uint32_t mButtonState;
+
     void initialize();
 
     void sync(nsecs_t when);

services/input/tests/InputReader_test.cpp

@@ -2460,11 +2460,21 @@ void SingleTouchInputMapperTest::processSync(SingleTouchInputMapper* mapper) {
 }
 
 
-TEST_F(SingleTouchInputMapperTest, GetSources_WhenDeviceTypeIsNotSpecified_ReturnsTouchPad) {
+TEST_F(SingleTouchInputMapperTest, GetSources_WhenDeviceTypeIsNotSpecifiedAndNotACursor_ReturnsPointer) {
     SingleTouchInputMapper* mapper = new SingleTouchInputMapper(mDevice);
     prepareAxes(POSITION);
     addMapperAndConfigure(mapper);
 
+    ASSERT_EQ(AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD, mapper->getSources());
+}
+
+TEST_F(SingleTouchInputMapperTest, GetSources_WhenDeviceTypeIsNotSpecifiedAndIsACursor_ReturnsTouchPad) {
+    SingleTouchInputMapper* mapper = new SingleTouchInputMapper(mDevice);
+    mFakeEventHub->addRelativeAxis(DEVICE_ID, REL_X);
+    mFakeEventHub->addRelativeAxis(DEVICE_ID, REL_Y);
+    prepareAxes(POSITION);
+    addMapperAndConfigure(mapper);
+
     ASSERT_EQ(AINPUT_SOURCE_TOUCHPAD, mapper->getSources());
 }