android/src/DifferentTouchInput.java

   1 /* Copyright_License {
   2
   3   XCSoar Glide Computer - http://www.xcsoar.org/
   4   Copyright (C) 2000-2013 The XCSoar Project
   5   A detailed list of copyright holders can be found in the file "AUTHORS".
   6
   7   This program is free software; you can redistribute it and/or
   8   modify it under the terms of the GNU General Public License
   9   as published by the Free Software Foundation; either version 2
  10   of the License, or (at your option) any later version.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with this program; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 }
  21 */
  22
  23 package org.xcsoar;
  24
  25 import android.os.Build;
  26 import android.view.MotionEvent;
  27
  28 /**
  29  * Forward MotionEvent object to EventBridge.
  30  */
  31 abstract class DifferentTouchInput {
  32   public static DifferentTouchInput getInstance() {
  33     if (Build.VERSION.SDK_INT < 8)
  34       /* up to Android 2.1 Eclair */
  35       return SingleTouchInput.Holder.sInstance;
  36     else
  37       /* Android 2.2 Froyo or newer */
  38       return MultiTouchInput.Holder.sInstance;
  39   }
  40
  41   public abstract void process(final MotionEvent event);
  42
  43   /**
  44    * Implementation for Android versions that are not capable of
  45    * MultiTouch.
  46    */
  47   private static class SingleTouchInput extends DifferentTouchInput {
  48     private static class Holder {
  49       private static final SingleTouchInput sInstance = new SingleTouchInput();
  50     }
  51
  52     public void process(final MotionEvent event) {
  53       switch (event.getAction()) {
  54       case MotionEvent.ACTION_DOWN:
  55         EventBridge.onMouseDown((int)event.getX(), (int)event.getY());
  56         break;
  57
  58       case MotionEvent.ACTION_UP:
  59         EventBridge.onMouseUp((int)event.getX(), (int)event.getY());
  60         break;
  61
  62       case MotionEvent.ACTION_MOVE:
  63         EventBridge.onMouseMove((int)event.getX(), (int)event.getY());
  64         break;
  65       }
  66     }
  67   }
  68
  69   /**
  70    * Implementation for Android versions with MultiTouch support.
  71    */
  72   private static class MultiTouchInput extends DifferentTouchInput {
  73     private static class Holder {
  74       private static final MultiTouchInput sInstance = new MultiTouchInput();
  75     }
  76
  77     public void process(final MotionEvent event) {
  78       switch (event.getActionMasked()) {
  79       case MotionEvent.ACTION_DOWN:
  80         EventBridge.onMouseDown((int)event.getX(), (int)event.getY());
  81         break;
  82
  83       case MotionEvent.ACTION_UP:
  84         EventBridge.onMouseUp((int)event.getX(), (int)event.getY());
  85         break;
  86
  87       case MotionEvent.ACTION_MOVE:
  88         EventBridge.onMouseMove((int)event.getX(), (int)event.getY());
  89         break;
  90
  91       case MotionEvent.ACTION_POINTER_DOWN:
  92         EventBridge.onPointerDown();
  93         break;
  94
  95       case MotionEvent.ACTION_POINTER_UP:
  96         EventBridge.onPointerUp();
  97         break;
  98       }
  99     }
 100   }
 101 }