1 /* 2 * Copyright (C) 2021 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.wm.shell.back; 18 19 import android.view.KeyEvent; 20 import android.view.MotionEvent; 21 import android.window.BackEvent; 22 23 import com.android.wm.shell.common.annotations.ExternalThread; 24 25 /** 26 * Interface for external process to get access to the Back animation related methods. 27 */ 28 @ExternalThread 29 public interface BackAnimation { 30 31 /** 32 * Called when a {@link MotionEvent} is generated by a back gesture. 33 * 34 * @param touchX the X touch position of the {@link MotionEvent}. 35 * @param touchY the Y touch position of the {@link MotionEvent}. 36 * @param keyAction the original {@link KeyEvent#getAction()} when the event was dispatched to 37 * the process. This is forwarded separately because the input pipeline may mutate 38 * the {#event} action state later. 39 * @param swipeEdge the edge from which the swipe begins. 40 */ onBackMotion(float touchX, float touchY, int keyAction, @BackEvent.SwipeEdge int swipeEdge)41 void onBackMotion(float touchX, float touchY, int keyAction, 42 @BackEvent.SwipeEdge int swipeEdge); 43 44 /** 45 * Sets whether the back gesture is past the trigger threshold or not. 46 */ setTriggerBack(boolean triggerBack)47 void setTriggerBack(boolean triggerBack); 48 49 /** 50 * Sets the threshold values that defining edge swipe behavior. 51 * @param triggerThreshold the min threshold to trigger back. 52 * @param progressThreshold the max threshold to keep progressing back animation. 53 */ setSwipeThresholds(float triggerThreshold, float progressThreshold)54 void setSwipeThresholds(float triggerThreshold, float progressThreshold); 55 } 56