xbmc/platform/android/activity/AndroidTouch.cpp

   1 /*
   2  *  Copyright (C) 2012-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "AndroidTouch.h"
  10
  11 #include "input/touch/generic/GenericTouchActionHandler.h"
  12 #include "input/touch/generic/GenericTouchInputHandler.h"
  13
  14 #include "platform/android/activity/XBMCApp.h"
  15
  16 CAndroidTouch::CAndroidTouch()
  17 {
  18   CGenericTouchInputHandler::GetInstance().RegisterHandler(&CGenericTouchActionHandler::GetInstance());
  19 }
  20
  21 CAndroidTouch::~CAndroidTouch()
  22 {
  23   CGenericTouchInputHandler::GetInstance().UnregisterHandler();
  24 }
  25
  26 bool CAndroidTouch::onTouchEvent(AInputEvent* event)
  27 {
  28   if (event == NULL)
  29     return false;
  30
  31   size_t numPointers = AMotionEvent_getPointerCount(event);
  32   if (numPointers <= 0)
  33   {
  34     CXBMCApp::android_printf(" => aborting touch event because there are no active pointers");
  35     return false;
  36   }
  37
  38   if (numPointers > CGenericTouchInputHandler::MAX_POINTERS)
  39     numPointers = CGenericTouchInputHandler::MAX_POINTERS;
  40
  41   int32_t eventAction = AMotionEvent_getAction(event);
  42   int8_t touchAction = eventAction & AMOTION_EVENT_ACTION_MASK;
  43   size_t touchPointer = eventAction >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
  44
  45   TouchInput touchEvent = TouchInputAbort;
  46   switch (touchAction)
  47   {
  48     case AMOTION_EVENT_ACTION_DOWN:
  49     case AMOTION_EVENT_ACTION_POINTER_DOWN:
  50       touchEvent = TouchInputDown;
  51       break;
  52
  53     case AMOTION_EVENT_ACTION_UP:
  54     case AMOTION_EVENT_ACTION_POINTER_UP:
  55       touchEvent = TouchInputUp;
  56       break;
  57
  58     case AMOTION_EVENT_ACTION_MOVE:
  59       touchEvent = TouchInputMove;
  60       break;
  61
  62     case AMOTION_EVENT_ACTION_OUTSIDE:
  63     case AMOTION_EVENT_ACTION_CANCEL:
  64     default:
  65       break;
  66   }
  67
  68   float x = AMotionEvent_getX(event, touchPointer);
  69   float y = AMotionEvent_getY(event, touchPointer);
  70   int64_t time = AMotionEvent_getEventTime(event);
  71
  72   // first update all touch pointers
  73   for (unsigned int pointer = 0; pointer < numPointers; pointer++)
  74     CGenericTouchInputHandler::GetInstance().UpdateTouchPointer(pointer, AMotionEvent_getX(event, pointer), AMotionEvent_getY(event, pointer),
  75     AMotionEvent_getEventTime(event));
  76
  77   // let system know that we are starting a guesture
  78   if (touchEvent == TouchInputDown)
  79     CGenericTouchActionHandler::GetInstance().QuerySupportedGestures(x, y);
  80
  81   // now send the event
  82   return CGenericTouchInputHandler::GetInstance().HandleTouchInput(touchEvent, x, y, time, touchPointer);
  83 }
  84
  85 void CAndroidTouch::setDPI(uint32_t dpi)
  86 {
  87   if (dpi != 0)
  88   {
  89     m_dpi = dpi;
  90
  91     CGenericTouchInputHandler::GetInstance().SetScreenDPI(m_dpi);
  92   }
  93 }