wm__gethasfocus.c

来自「uCGUI」· C语言 代码 · 共 41 行

/*************************************************************************************************************
                                                   uC/GUI
                                               嵌入式通用图形软件
File        : WM__GetHasFocus.c
Purpose     : Implementation of WM__GetHasFocus
************************************************************************************************************/

#include "WM_Intern.H"

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

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

/*************************************************************************************************************
*       WM__GetHasFocus

  Return value:
    0    window does not have the focus
    1    window has focus
    -1   0 handle
*/
int WM__GetHasFocus(WM_HWIN hWin) {
  int r;
  WM_MESSAGE Msg;
  if (hWin) {
    Msg.MsgId  = WM_GET_HAS_FOCUS;
    Msg.Data.v = 0;
    WM__SendMessage(hWin, &Msg);
    r = Msg.Data.v;
  } else {
    r = -1;
  }
  return r;
}

#else
  void WM_GetHasFocus_C(void) {} /* avoid empty object files */
#endif