/***********************************************************************************************************                                                uC/GUI*                        Universal graphic software for embedded applications**                       (c) Copyright 2002, Micrium Inc., Weston, FL*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH**              礐/GUI is protected by international copyright laws. Knowledge of the*              source code may not be used to write a similar product. This file may*              only be used in accordance with a license and should not be redistributed*              in any way. We appreciate your understanding and fairness.*----------------------------------------------------------------------File        : WMTouch.cPurpose     : Windows manager, touch support----------------------------------------------------------------------*/#include <stddef.h>           /* needed for definition of NULL */#include "WM_Intern.H"#include "GUIDebug.h"#if (GUI_WINSUPPORT & (GUI_SUPPORT_TOUCH | GUI_SUPPORT_MOUSE))/******************************************************************          static data*******************************************************************/static WM_HWIN _hWinLast;/******************************************************************          Static code*******************************************************************/void _cbDeleteWindow(WM_HWIN hWin) {  if (hWin == _hWinLast) {    _hWinLast = 0;  }}/******************************************************************       Public code*******************************************************************//******************************************************************       WM_HandleHID       ** Polls the touch screen. If something has changed,* sends a message to the concerned window.** Return value:*   0 if nothing has been done*   1 if touch message has been sent*/int WM_HandleHID(void) {  int r = 0;  static GUI_TOUCH_tState StateLast;  GUI_HID_STATE State;  GUI_HID_GetState(&State);  WM_LOCK();  WM__pfDeleteWindowHook = _cbDeleteWindow;   /* TBD in the future... Hook function management in order to allow multiple hook functions */  #if GUI_SUPPORT_CURSOR    GUI_CURSOR_SetPosition(State.x, State.y);  #endif  if (StateLast.Pressed | State.Pressed) {    if (   (StateLast.x != State.x)        || (StateLast.y != State.y)        || ((StateLast.Pressed ? 1:0) != (State.Pressed ? 1:0)))    {      WM_MESSAGE Msg;      WM_HWIN hWin;      StateLast = State;             /* Remember current values */      r = 1;      Msg.MsgId = WM_TOUCH;      Msg.Data.p = (void*)&State;      if (WM__hCapture == 0) {        hWin = WM_Screen2hWin(State.x, State.y);      } else {        hWin = WM__hCapture;      }      /* Tell window if it is no longer pressed */      if (_hWinLast != hWin) {        if (_hWinLast != 0) {          if (State.Pressed) {            Msg.Data.p = NULL;    /* no longer in this window */          } else {     /* "Clicked" in this window */            StateLast.Pressed =0;            Msg.Data.p = (void*)&StateLast;          }          GUI_DEBUG_LOG1 ("\nSending WM_Touch to LastWindow %d (out of area)", _hWinLast);          WM_SendMessage(_hWinLast, &Msg);          _hWinLast = 0;        }      }      if (hWin) {           /* Sending WM_Touch to Window */        /* convert screen into window coordinates */        WM_Obj* pWin = WM_H2P(hWin);        State.x -= pWin->Rect.x0;        State.y -= pWin->Rect.y0;        WM_SendMessage(hWin, &Msg);        /* Remember window */        if (State.Pressed) {          _hWinLast = hWin;        } else {          /* Handle automatic captue release */          if (WM__CaptureReleaseAuto) {            WM_ReleaseCapture();          }          _hWinLast = 0;        }      }    }  }  WM_UNLOCK();  return r;}#elsevoid WM_Touch_c(void) {} /* avoid empty object files */#endif  /* (GUI_WINSUPPORT & GUI_SUPPORT_TOUCH) */