1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.launcher3; 18 19 import static android.view.MotionEvent.CLASSIFICATION_TWO_FINGER_SWIPE; 20 21 import android.annotation.TargetApi; 22 import android.os.Build; 23 import android.view.MotionEvent; 24 25 /** Handles motion events from trackpad. */ 26 public class MotionEventsUtils { 27 28 /** {@link MotionEvent#CLASSIFICATION_MULTI_FINGER_SWIPE} is hidden. */ 29 public static final int CLASSIFICATION_MULTI_FINGER_SWIPE = 4; 30 31 /** {@link MotionEvent#AXIS_GESTURE_SWIPE_FINGER_COUNT} is hidden. */ 32 private static final int AXIS_GESTURE_SWIPE_FINGER_COUNT = 53; 33 34 @TargetApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE) isTrackpadScroll(MotionEvent event)35 public static boolean isTrackpadScroll(MotionEvent event) { 36 return event.getClassification() == CLASSIFICATION_TWO_FINGER_SWIPE; 37 } 38 39 @TargetApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE) isTrackpadMultiFingerSwipe(MotionEvent event)40 public static boolean isTrackpadMultiFingerSwipe(MotionEvent event) { 41 return event.getClassification() == CLASSIFICATION_MULTI_FINGER_SWIPE; 42 } 43 isTrackpadThreeFingerSwipe(MotionEvent event)44 public static boolean isTrackpadThreeFingerSwipe(MotionEvent event) { 45 return isTrackpadMultiFingerSwipe(event) && event.getAxisValue( 46 AXIS_GESTURE_SWIPE_FINGER_COUNT) == 3; 47 } 48 isTrackpadFourFingerSwipe(MotionEvent event)49 public static boolean isTrackpadFourFingerSwipe(MotionEvent event) { 50 return isTrackpadMultiFingerSwipe(event) && event.getAxisValue( 51 AXIS_GESTURE_SWIPE_FINGER_COUNT) == 4; 52 } 53 isTrackpadMotionEvent(MotionEvent event)54 public static boolean isTrackpadMotionEvent(MotionEvent event) { 55 return isTrackpadScroll(event) || isTrackpadMultiFingerSwipe(event); 56 } 57 } 58