| /* |
| * Copyright 2022 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.input.motionprediction.kalman; |
| |
| import static androidx.annotation.RestrictTo.Scope.LIBRARY; |
| |
| import android.view.MotionEvent; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import androidx.annotation.RestrictTo; |
| |
| /** |
| * Simple interface for predicting motion points. |
| * |
| */ |
| @RestrictTo(LIBRARY) |
| public interface KalmanPredictor { |
| /** Sets the report rate */ |
| void setReportRate(int reportRateMs); |
| |
| /** Reports the motion events */ |
| boolean onTouchEvent(@NonNull MotionEvent event); |
| |
| /** @return null if not possible to make a prediction. */ |
| @Nullable |
| MotionEvent predict(int predictionTargetMillis); |
| } |