wm_validate.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 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_Validate.C
Purpose 	: Windows manager, add. module
----------------------------------------------------------------------
*/

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

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

/*********************************************************************
*
*   	 Macros for internal use
*
**********************************************************************
*/

#define Min(v0,v1) ((v0>v1) ? v1 : v0)
#define Max(v0,v1) ((v0>v1) ? v0 : v1)

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

  The result is the smallest rectangle which includes the entire
  remaining area.

  *pDest = *pr0- *pr1;
*/
static void _SubRect(GUI_RECT *pDest, const GUI_RECT *pr0, const GUI_RECT *pr1)
{
	if ((pDest == NULL) || (pr0 == NULL))
	{
		return;
	}
	*pDest = *pr0;	 
	if (pr1 == NULL)
	{
		return;
	}
	/* Check left/right sides */
	if ((pr1->y0 <= pr0->y0) && (pr1->y1 >= pr0->y1))
	{
		pDest->x0 = Max(pr0->x0, pr1->x1);
		pDest->x1 = Min(pr0->x1, pr1->x0);
	}
	/* Check top/bottom sides */
	if ((pr1->x0 <= pr0->x0) && (pr1->x1 >= pr0->x1))
	{
		pDest->y0 = Max(pr0->y0, pr1->y1);
		pDest->y1 = Min(pr0->y1, pr1->y0);
	}
}

/*********************************************************************
*
*   	WM_ValidateRect
*
  Use this function with great care ! It should under most circumstances not
  be necessary to use it, as validation is done automatically as soon as
  a window has been redrawn. If you validate a section of a window, this
  part will not be included in the paint-command and could therefor not
  be updated.
*/
void WM_ValidateRect(WM_HWIN hWin, const GUI_RECT *pRect)
{
	WM_Obj* pWin;
	if (hWin)
	{
		WM_LOCK();
		pWin = WM_HANDLE2PTR(hWin);
		if (pWin->Status & WM_SF_INVALID)
		{
			if (pRect)
			{
				_SubRect(&pWin->InvalidRect, &pWin->InvalidRect, pRect);
				if (WM__RectIsNZ(&pWin->InvalidRect))
				{
					goto Done;
				}
			}
			pWin->Status &= ~WM_SF_INVALID;
			WM__NumInvalidWindows--;
		}
		Done:
		WM_UNLOCK();
	}
}

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

/*************************** End of file ****************************/