radio_setgroupid.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		: RADIO_SetGroupId.c
Purpose 	: Implementation of RADIO widget
---------------------------END-OF-HEADER------------------------------
*/

#include <stdlib.h>
#include "RADIO.h"
#include "RADIO_Private.h"

#if GUI_WINSUPPORT

/*********************************************************************
*
*   	static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_SetValue
*/
static void _SetValue(RADIO_Handle hObj, int v)
{
	RADIO_Obj* pObj;
	pObj = RADIO_H2P(hObj);
	RADIO__SetValue(hObj, pObj, v);
}

/*********************************************************************
*
*   	_IsInGroup
*/
static int _IsInGroup(WM_HWIN hWin, U8 GroupId)
{
	if (GroupId)
	{
		WM_MESSAGE Msg;
		Msg.MsgId = WM_GET_RADIOGROUP;
		WM_SendMessage(hWin, &Msg);
		return (Msg.Data.v == GroupId);
	}
	return 0;
}

/*********************************************************************
*
*   	_GetPrevInGroup
*/
static WM_HWIN _GetPrevInGroup(WM_HWIN hWin, U8 GroupId)
{
	for (hWin = WM__GetPrevSibling(hWin); hWin; hWin = WM__GetPrevSibling(hWin))
	{
		if (_IsInGroup(hWin, GroupId))
		{
			return hWin;
		}
	}
	return 0;
}

/*********************************************************************
*
*   	_GetNextInGroup
*/
static WM_HWIN _GetNextInGroup(WM_HWIN hWin, U8 GroupId)
{
	for (; hWin; hWin = WM_GetNextSibling(hWin))
	{
		if (_IsInGroup(hWin, GroupId))
		{
			return hWin;
		}
	}
	return 0;
}

/*********************************************************************
*
*   	_ClearSelection
*/
static void _ClearSelection(RADIO_Handle hObj, U8 GroupId)
{
	WM_HWIN hWin;
	WM_Obj* pWin;
	for (hWin = WM__GetFirstSibling(hObj); hWin; hWin = pWin->hNext)
	{
		pWin = WM_H2P(hWin);
		if (hWin != hObj)
		{
			if (_IsInGroup(hWin, GroupId))
			{
				RADIO__SetValue(hWin, (RADIO_Obj *) pWin, -1);
			}
		}
	}
}

/*********************************************************************
*
*   	_HandleSetValue
*/
static void _HandleSetValue(RADIO_Handle hObj, RADIO_Obj *pObj, int v)
{
	if (v < 0)
	{
		WM_HWIN hWin = _GetPrevInGroup(hObj, pObj->GroupId);
		if (hWin)
		{
			WM_SetFocus(hWin);
			_SetValue(hWin, 0x7FFF);
			RADIO__SetValue(hObj, pObj, -1);
		}
	}
	else if (v >= pObj->NumItems)
	{
		WM_HWIN hWin = _GetNextInGroup(pObj->Widget.Win.hNext, pObj->GroupId);
		if (hWin)
		{
			WM_SetFocus(hWin);
			_SetValue(hWin, 0);
			RADIO__SetValue(hObj, pObj, -1);
		}
	}
	else
	{
		if (pObj->Sel != v)
		{
			_ClearSelection(hObj, pObj->GroupId);
			RADIO__SetValue(hObj, pObj, v);
		}
	}
}

/*********************************************************************
*
*   	Exported code
*
**********************************************************************
*/
/*********************************************************************
*
*   	RADIO_SetGroupId
*/
void RADIO_SetGroupId(RADIO_Handle hObj, U8 NewGroupId)
{
	if (hObj)
	{
		RADIO_Obj* pObj;
		U8 OldGroupId;
		WM_LOCK();
		pObj = RADIO_H2P(hObj);
		OldGroupId = pObj->GroupId;
		if (NewGroupId != OldGroupId)
		{
			WM_HWIN hFirst;
			hFirst = WM__GetFirstSibling(hObj);
			/* Set function pointer if necessary */
			if (NewGroupId && (RADIO__pfHandleSetValue == NULL))
			{
				RADIO__pfHandleSetValue = _HandleSetValue;
			}
			/* Pass our selection, if we have one, to another radio button in */
			/* our old group. So the group have a valid selection when we leave it. */
			if (OldGroupId && (pObj->Sel >= 0))
			{
				WM_HWIN hWin;
				pObj->GroupId = 0; /* Leave group first, so _GetNextInGroup() could */
				/* not find a handle to our own window. */
				hWin = _GetNextInGroup(hFirst, OldGroupId);
				if (hWin)
				{
					_SetValue(hWin, 0);
				}
			}
			/* Make sure we have a valid selection according to our new group */
			if (_GetNextInGroup(hFirst, NewGroupId) != 0)
			{
				/* Join an existing group with an already valid selection, so clear our own one */
				RADIO__SetValue(hObj, pObj, -1);
			}
			else if (pObj->Sel < 0)
			{
				/* We are the first window in group, so we must have a valid selection at our own. */
				RADIO__SetValue(hObj, pObj, 0);
			}
			/* Change the group */
			pObj->GroupId = NewGroupId;
		}
		WM_UNLOCK();
	}
}

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

/************************* end of file ******************************/