WM__SendMessage.c

/*
***********************************************************************************
*                                                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        : WM__SendMessage.c
Purpose     : Implementation of WM__SendMessage
----------------------------------------------------------------------
*/

#include            /* needed for definition of NULL */
#include "WM_Intern.h"

#if GUI_WINSUPPORT    /* If 0, WM will not generate any code */

/*********************************************************************
*
*       Public code
*
**********************************************************************
*/

/*********************************************************************
*
*       WM__SendMessage
*/

void WM__SendMessage(WM_HWIN hWin, WM_MESSAGE* pMsg) {

// 创建的窗体的句柄转化为指针，同时创建结构pWin时创建了回调函数指针cb指向WM_CALLBACK

// typedef void WM_CALLBACK( WM_MESSAGE* pMsg);

// #define WM_HANDLE2PTR(hWin) ((WM_Obj*)WM_HMEM2Ptr(hWin))
  WM_Obj* pWin = WM_HANDLE2PTR(hWin);

// 此窗体句柄存入消息结构中
  pMsg->hWin = hWin;

// 此处cb为回调函数指针，在窗体创建时作为参数带入
  if (pWin->cb != NULL) {

// 执行相应回调函数，pMsg作为参数消息带入
    (*pWin->cb)(pMsg);
  } else {
    WM_DefaultProc(pMsg);
  }
}

#endif