wm_settrans.c

来自「uCGUI」· C语言 代码 · 共 53 行

/*************************************************************************************************************
                                                   uC/GUI
                                               嵌入式通用图形软件
File        : WM_SetTrans.C
Purpose     : Windows manager, optional routines
************************************************************************************************************/


#include "WM_Intern.H"

#if GUI_WINSUPPORT    /* If 0, WM will not generate any code */
#include "GUIDebug.h"
#define WM_DEBUG_LEVEL 1

/*
  ********************************************************************
  *                                                                  *
  *           Manage transparency attributes                         *
  *                                                                  *
  ********************************************************************

*/
void WM_SetHasTrans(WM_HWIN hWin) {
  WM_Obj *pWin = WM_HANDLE2PTR(hWin);  
  /* First check if this is necessary at all */
  if (pWin->Status&WM_SF_HASTRANS)
    return;
  /* Set Transparency flag */
  pWin->Status |= WM_SF_HASTRANS;
  /* Mark content as invalid */
  WM_InvalidateWindow(hWin);
}

void WM_ClrHasTrans(WM_HWIN hWin) {
  WM_Obj *pWin = WM_HANDLE2PTR(hWin);  
/* First check if this is necessary at all */
  if ((pWin->Status&WM_SF_HASTRANS) ==0)
    return;
  pWin->Status &= ~WM_SF_HASTRANS;
  /* Mark content as invalid */
  WM_InvalidateWindow(hWin);
}

int WM_GetHasTrans(WM_HWIN hWin) {
  return WM_HANDLE2PTR(hWin)->Status &WM_SF_HASTRANS;
}

#else

void WM_SetTrans(void) {} /* avoid empty object files */

#endif /* WM_MAX_WINDOW */