content: /*
   * Copyright 2013 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.example.android.basicgesturedetect;
  
  import android.annotation.TargetApi;
  import android.os.Build;
  import android.view.GestureDetector;
  import android.view.MotionEvent;
  
  import com.example.android.common.logger.Log;
  
  public class GestureListener extends GestureDetector.SimpleOnGestureListener {
  
      public static final String TAG = "GestureListener";
  
      // BEGIN_INCLUDE(init_gestureListener)
      @Override
      public boolean onSingleTapUp(MotionEvent e) {
          // Up motion completing a single tap occurred.
          Log.i(TAG, "Single Tap Up" + getTouchType(e));
          return false;
      }
  
      @Override
      public void onLongPress(MotionEvent e) {
          // Touch has been long enough to indicate a long press.
          // Does not indicate motion is complete yet (no up event necessarily)
          Log.i(TAG, "Long Press" + getTouchType(e));
      }
  
      @Override
      public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
      float distanceY) {
          // User attempted to scroll
          Log.i(TAG, "Scroll" + getTouchType(e1));
          return false;
      }
  
      @Override
      public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
      float velocityY) {
          // Fling event occurred.  Notification of this one happens after an "up" event.
          Log.i(TAG, "Fling" + getTouchType(e1));
          return false;
      }
  
      @Override
      public void onShowPress(MotionEvent e) {
          // User performed a down event, and hasn't moved yet.
          Log.i(TAG, "Show Press" + getTouchType(e));
      }
  
      @Override
      public boolean onDown(MotionEvent e) {
          // "Down" event - User touched the screen.
          Log.i(TAG, "Down" + getTouchType(e));
          return false;
      }
  
      @Override
      public boolean onDoubleTap(MotionEvent e) {
          // User tapped the screen twice.
          Log.i(TAG, "Double tap" + getTouchType(e));
          return false;
      }
  
      @Override
      public boolean onDoubleTapEvent(MotionEvent e) {
          // Since double-tap is actually several events which are considered one aggregate
          // gesture, there's a separate callback for an individual event within the doubletap
          // occurring.  This occurs for down, up, and move.
          Log.i(TAG, "Event within double tap" + getTouchType(e));
          return false;
      }
  
      @Override
      public boolean onSingleTapConfirmed(MotionEvent e) {
          // A confirmed single-tap event has occurred.  Only called when the detector has
          // determined that the first tap stands alone, and is not part of a double tap.
          Log.i(TAG, "Single tap confirmed" + getTouchType(e));
          return false;
      }
      // END_INCLUDE(init_gestureListener)
  
  
      /**
       * Returns a human-readable string describing the type of touch that triggered a MotionEvent.
       */
  
      private static String getTouchType(MotionEvent e){
  
          String touchTypeDescription = " ";
          int touchType = e.getToolType(0);
  
          switch (touchType) {
              case MotionEvent.TOOL_TYPE_FINGER:
                  touchTypeDescription += "(finger)";
                  break;
              case MotionEvent.TOOL_TYPE_STYLUS:
                  touchTypeDescription += "(stylus, ";
                  //Get some additional information about the stylus touch
                  float stylusPressure = e.getPressure();
                  touchTypeDescription += "pressure: " + stylusPressure;
  
                  if(Build.VERSION.SDK_INT >= 21) {
                      touchTypeDescription += ", buttons pressed: " + getButtonsPressed(e);
                  }
  
                  touchTypeDescription += ")";
                  break;
              case MotionEvent.TOOL_TYPE_ERASER:
                  touchTypeDescription += "(eraser)";
                  break;
              case MotionEvent.TOOL_TYPE_MOUSE:
                  touchTypeDescription += "(mouse)";
                  break;
              default:
                  touchTypeDescription += "(unknown tool)";
                  break;
          }
  
          return touchTypeDescription;
      }
  
      /**
       * Returns a human-readable string listing all the stylus buttons that were pressed when the
       * input MotionEvent occurred.
       */
      @TargetApi(21)
      private static String getButtonsPressed(MotionEvent e){
          String buttons = "";
  
          if(e.isButtonPressed(MotionEvent.BUTTON_PRIMARY)){
              buttons += " primary";
          }
  
          if(e.isButtonPressed(MotionEvent.BUTTON_SECONDARY)){
              buttons += " secondary";
          }
  
          if(e.isButtonPressed(MotionEvent.BUTTON_TERTIARY)){
              buttons += " tertiary";
          }
  
          if(e.isButtonPressed(MotionEvent.BUTTON_BACK)){
              buttons += " back";
          }
  
          if(e.isButtonPressed(MotionEvent.BUTTON_FORWARD)){
              buttons += " forward";
          }
  
          if (buttons.equals("")){
              buttons = "none";
          }
  
          return buttons;
      }
  
  }
  