system/lib/lcd/gui/WM/WM_SetCallback.c

55 lines
1.8 KiB
C

/*
*********************************************************************************************************
* uC/GUI
* Universal graphic software for embedded applications
*
* (c) Copyright 2002, Micrium Inc., Weston, FL
* (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
* µC/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_SetCallback.C
Purpose : Windows manager, add. module
----------------------------------------------------------------------
*/
#include <stddef.h>
#include "WM_Intern.h"
#if GUI_WINSUPPORT /* If 0, WM will not generate any code */
#include "GUIDebug.h"
/*********************************************************************
*
* Exported routines: Set callback
*
**********************************************************************
*/
/*********************************************************************
*
* WM_SetCallback
*/
WM_CALLBACK* WM_SetCallback (WM_HWIN hWin, WM_CALLBACK* cb) {
WM_CALLBACK* r = NULL;
if (hWin) {
WM_Obj* pWin;
WM_LOCK();
pWin = WM_H2P(hWin);
r = pWin->cb;
pWin->cb = cb;
WM_InvalidateWindow(hWin);
WM_UNLOCK();
}
return r;
}
#else
void WM_SetCallBack(void) {} /* avoid empty object files */
#endif /* GUI_WINSUPPORT */
/*************************** End of file ****************************/