listbox_deleteitem.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		: LISTBOX_DeleteItem.c
Purpose 	: Implementation of LISTBOX_DeleteItem
---------------------------END-OF-HEADER------------------------------
*/

#include <string.h>
#include "LISTBOX_Private.h"

#if GUI_WINSUPPORT


/*********************************************************************
*
*   	Public routines
*
**********************************************************************
*/

/*********************************************************************
*
*   	LISTBOX_DeleteItem
*/
void LISTBOX_DeleteItem(LISTBOX_Handle hObj, unsigned int Index)
{
	if (hObj)
	{
		int Sel;
		LISTBOX_Obj* pObj;
		unsigned int NumItems;
		WM_LOCK();
		pObj = LISTBOX_H2P(hObj);
		NumItems = LISTBOX__GetNumItems(pObj);
		if (Index < NumItems)
		{
			GUI_ARRAY_DeleteItem(&pObj->ItemArray, Index);
			/*
			 * Update selection
			 */
			Sel = pObj->Sel;
			if (Sel >= 0)
			{
				/* Valid selction ? */
				if ((int) Index == Sel)
				{
					/* Deleting selected item ? */
					pObj->Sel = -1; 				/* Invalidate selection */
				}
				else if ((int) Index < Sel)
				{
					/* Deleting item above selection ? */
					pObj->Sel--;
				}
			}
			if (LISTBOX_UpdateScrollers(hObj))
			{
				LISTBOX__InvalidateInsideArea(hObj);
			}
			else
			{
				LISTBOX__InvalidateItemAndBelow(hObj, pObj, Index);
			}
		}
		WM_UNLOCK();
	}
}

#else   						 /* Avoid problems with empty object modules */
void LISTBOX_DeleteString_C(void)
{
}
#endif