content: /*******************************************************************************
   * Copyright  2015 Albin Mathew.
   *  <p/>
   * 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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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.albinmathew.photocrop.photoview.gestures;
  
  import android.annotation.TargetApi;
  import android.content.Context;
  import android.view.MotionEvent;
  import android.view.ScaleGestureDetector;
  
  @TargetApi(8)
  public class FroyoGestureDetector extends EclairGestureDetector {
  
      protected final ScaleGestureDetector mDetector;
  
      protected final RotationGestureDetector mRotationDetector;
  
      public FroyoGestureDetector(Context context) {
          super(context);
          ScaleGestureDetector.OnScaleGestureListener mScaleListener =
              new ScaleGestureDetector.OnScaleGestureListener() {
  
                  @Override
                  public boolean onScale(ScaleGestureDetector detector) {
                      float scaleFactor = detector.getScaleFactor();
  
                      if (Float.isNaN(scaleFactor) || Float.isInfinite(scaleFactor)) {
                          return false;
                      }
  
                      mListener.onScale(scaleFactor, detector.getFocusX(), detector.getFocusY());
                      return true;
                  }
  
                  @Override
                  public boolean onScaleBegin(ScaleGestureDetector detector) {
                      return true;
                  }
  
                  @Override
                  public void onScaleEnd(ScaleGestureDetector detector) {
                      // NO-OP
                  }
              };
  
          RotationGestureDetector.OnRotationGestureListener mRotateListener =
              new RotationGestureDetector.OnRotationGestureListener() {
                  @Override
                  public boolean onRotate(RotationGestureDetector detector) {
                      mListener.onRotate(detector.getRotationDelta(), detector.getFocusX(), detector.getFocusY());
                      return true;
                  }
  
                  @Override
                  public boolean onRotationBegin(RotationGestureDetector detector) {
                      return true;
                  }
  
                  @Override
                  public void onRotationEnd(RotationGestureDetector detector) {
  
                  }
              };
          mDetector = new ScaleGestureDetector(context, mScaleListener);
          mRotationDetector = new RotationGestureDetector(context, mRotateListener);
      }
  
      @Override
      public boolean isScaling() {
          return mDetector.isInProgress();
      }
  
      @Override
      public boolean isRotating() {
          return mRotationDetector.isInProgress();
      }
  
      @Override
      public boolean onTouchEvent(MotionEvent ev) {
          mDetector.onTouchEvent(ev);
          mRotationDetector.onTouchEvent(ev);
          return super.onTouchEvent(ev);
      }
  }
  