content: /*
   * Copyright (C) 2018 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 com.android.launcher3.uioverrides;
  
  import android.content.Context;
  import android.os.Handler;
  
  import com.android.systemui.shared.system.RotationWatcher;
  
  /**
   * Utility class for listening for rotation changes
   */
  public class DisplayRotationListener extends RotationWatcher {
  
      private final Runnable mCallback;
      private Handler mHandler;
  
      public DisplayRotationListener(Context context, Runnable callback) {
          super(context);
          mCallback = callback;
      }
  
      @Override
      public void enable() {
          if (mHandler == null) {
              mHandler = new Handler();
          }
          super.enable();
      }
  
      @Override
      protected void onRotationChanged(int i) {
          mHandler.post(mCallback);
      }
  }
  