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Commit acc217e2 authored by Tracy Zhou's avatar Tracy Zhou
Browse files

Support showing transient bars upon 3-finger swipe from trackpad 

Fixes: 285727229
Test: make sure 3-finger swipes from all directions can pull up task bar
and status bar

Change-Id: Ic0179f1eac7334d6c17a6697b22de167e0b75f80
parent a8d52203

services/core/java/com/android/server/wm/SystemGesturesPointerEventListener.java

+52 −0
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ import static android.view.DisplayCutout.BOUNDS_POSITION_BOTTOM; 
import static android.view.DisplayCutout.BOUNDS_POSITION_LEFT;

import static android.view.DisplayCutout.BOUNDS_POSITION_RIGHT;

import static android.view.DisplayCutout.BOUNDS_POSITION_TOP;

import static android.view.MotionEvent.AXIS_GESTURE_SWIPE_FINGER_COUNT;

import static android.view.MotionEvent.CLASSIFICATION_MULTI_FINGER_SWIPE;



import android.annotation.NonNull;

import android.content.Context;
@@ -59,6 +61,12 @@ class SystemGesturesPointerEventListener implements PointerEventListener { 
    private static final int SWIPE_FROM_RIGHT = 3;

    private static final int SWIPE_FROM_LEFT = 4;



    private static final int TRACKPAD_SWIPE_NONE = 0;

    private static final int TRACKPAD_SWIPE_FROM_TOP = 1;

    private static final int TRACKPAD_SWIPE_FROM_BOTTOM = 2;

    private static final int TRACKPAD_SWIPE_FROM_RIGHT = 3;

    private static final int TRACKPAD_SWIPE_FROM_LEFT = 4;



    private final Context mContext;

    private final Handler mHandler;

    private int mDisplayCutoutTouchableRegionSize;
@@ -207,6 +215,25 @@ class SystemGesturesPointerEventListener implements PointerEventListener { 
                break;

            case MotionEvent.ACTION_MOVE:

                if (mSwipeFireable) {

                    int trackpadSwipe = detectTrackpadThreeFingerSwipe(event);

                    mSwipeFireable = trackpadSwipe == TRACKPAD_SWIPE_NONE;

                    if (!mSwipeFireable) {

                        if (trackpadSwipe == TRACKPAD_SWIPE_FROM_TOP) {

                            if (DEBUG) Slog.d(TAG, "Firing onSwipeFromTop from trackpad");

                            mCallbacks.onSwipeFromTop();

                        } else if (trackpadSwipe == TRACKPAD_SWIPE_FROM_BOTTOM) {

                            if (DEBUG) Slog.d(TAG, "Firing onSwipeFromBottom from trackpad");

                            mCallbacks.onSwipeFromBottom();

                        } else if (trackpadSwipe == TRACKPAD_SWIPE_FROM_RIGHT) {

                            if (DEBUG) Slog.d(TAG, "Firing onSwipeFromRight from trackpad");

                            mCallbacks.onSwipeFromRight();

                        } else if (trackpadSwipe == TRACKPAD_SWIPE_FROM_LEFT) {

                            if (DEBUG) Slog.d(TAG, "Firing onSwipeFromLeft from trackpad");

                            mCallbacks.onSwipeFromLeft();

                        }

                        break;

                    }



                    final int swipe = detectSwipe(event);

                    mSwipeFireable = swipe == SWIPE_NONE;

                    if (swipe == SWIPE_FROM_TOP) {
@@ -300,6 +327,31 @@ class SystemGesturesPointerEventListener implements PointerEventListener { 
        return mDownPointers - 1;

    }



    private int detectTrackpadThreeFingerSwipe(MotionEvent move) {

        if (!isTrackpadThreeFingerSwipe(move)) {

            return TRACKPAD_SWIPE_NONE;

        }



        float dx = move.getX() - mDownX[0];

        float dy = move.getY() - mDownY[0];

        if (Math.abs(dx) < Math.abs(dy)) {

            if (Math.abs(dy) > mSwipeDistanceThreshold) {

                return dy > 0 ? TRACKPAD_SWIPE_FROM_TOP : TRACKPAD_SWIPE_FROM_BOTTOM;

            }

        } else {

            if (Math.abs(dx) > mSwipeDistanceThreshold) {

                return dx > 0 ? TRACKPAD_SWIPE_FROM_LEFT : TRACKPAD_SWIPE_FROM_RIGHT;

            }

        }



        return TRACKPAD_SWIPE_NONE;

    }



    private static boolean isTrackpadThreeFingerSwipe(MotionEvent event) {

        return event.getClassification() == CLASSIFICATION_MULTI_FINGER_SWIPE

                && event.getAxisValue(AXIS_GESTURE_SWIPE_FINGER_COUNT) == 3;

    }



    private int detectSwipe(MotionEvent move) {

        final int historySize = move.getHistorySize();

        final int pointerCount = move.getPointerCount();