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      1 /*
      2  * Copyright (C) 2018 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 package com.android.quickstep;
     17 
     18 import android.annotation.TargetApi;
     19 import android.os.Build;
     20 import android.support.annotation.IntDef;
     21 import android.view.Choreographer;
     22 import android.view.MotionEvent;
     23 
     24 import java.lang.annotation.Retention;
     25 import java.lang.annotation.RetentionPolicy;
     26 import java.util.function.Consumer;
     27 
     28 @TargetApi(Build.VERSION_CODES.O)
     29 @FunctionalInterface
     30 public interface TouchConsumer extends Consumer<MotionEvent> {
     31 
     32     @IntDef(flag = true, value = {
     33             INTERACTION_NORMAL,
     34             INTERACTION_QUICK_SCRUB
     35     })
     36     @Retention(RetentionPolicy.SOURCE)
     37     @interface InteractionType {}
     38     int INTERACTION_NORMAL = 0;
     39     int INTERACTION_QUICK_SCRUB = 1;
     40 
     41     default void reset() { }
     42 
     43     default void updateTouchTracking(@InteractionType int interactionType) { }
     44 
     45     default void onQuickScrubEnd() { }
     46 
     47     default void onQuickScrubProgress(float progress) { }
     48 
     49     default void onQuickStep(MotionEvent ev) { }
     50 
     51     default void onCommand(int command) { }
     52 
     53     /**
     54      * Called on the binder thread to allow the consumer to process the motion event before it is
     55      * posted on a handler thread.
     56      */
     57     default void preProcessMotionEvent(MotionEvent ev) { }
     58 
     59     default Choreographer getIntrimChoreographer(MotionEventQueue queue) {
     60         return null;
     61     }
     62 
     63     default void deferInit() { }
     64 
     65     default boolean deferNextEventToMainThread() {
     66         return false;
     67     }
     68 
     69     default boolean forceToLauncherConsumer() {
     70         return false;
     71     }
     72 
     73     default void onShowOverviewFromAltTab() {}
     74 }
     75