demo_tablelist.cpp

使用yacc的一个例子

#include "stdafx.h"
#include "Demo_TableList.h"

CDemo_TableList::CDemo_TableList(CSdbms_Database *pDB/*=NULL*/, CSdbms_Table *pTable/*=NULL*/)
{
	m_pDatabase = pDB;
	m_pTable = pTable;
}

CDemo_TableList::~CDemo_TableList()
{
}

BEGIN_MESSAGE_MAP(CDemo_TableList, CCJListCtrl)
	ON_WM_CREATE()
END_MESSAGE_MAP()

int CDemo_TableList::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CCJListCtrl::OnCreate(lpCreateStruct) == -1)
		return -1;

	Update();
	return 0;
}

void CDemo_TableList::Update()
{
	if	(m_pTable == NULL)
		return;

	//删除以前的数据
	CHeaderCtrl* pHeader = (CHeaderCtrl*)GetDlgItem(0);
	int nColumnCount = pHeader->GetItemCount();
	for	(int i=0; i<nColumnCount; i++)
		VERIFY(DeleteColumn(0));
	VERIFY(DeleteAllItems());

	//设置表头
	UINT nSLSize = m_pTable->m_SecLevel.GetSize();
	for (i=0; i<m_pTable->m_FieldArray.GetSize(); i++)
	{
		AddColumn(m_pTable->m_FieldArray[i]->m_strFieldName);
		if	(nSLSize != 0)
			AddColumn("SecLevel");	
	}
	AutoSizeColumn();

	//显示记录值
	BYTE *pRecord = m_pTable->GetFirstRecord();
	while (pRecord)
	{
		InsertRecord(pRecord);
		pRecord = m_pTable->GetNextRecord();
	}
}

void CDemo_TableList::InsertRecord(BYTE *pRecord)
{
	char strNull[MAX_RECORD_SIZE];
	memset(strNull, NULL_CHAR, MAX_RECORD_SIZE);

	int nItem = GetItemCount();
	InsertItem(nItem, "");

	int nIndex = 0;
	for (int i=0, nSubItem=0; i<m_pTable->m_FieldArray.GetSize(); i++)
	{
		CSdbms_Field *pField = m_pTable->m_FieldArray[i];
		CSdbms_Table *pOwnTable = pField->m_pOwnTable;
		UINT nSLSize = pOwnTable->m_SecLevel.GetSize();
		CString strTemp;

		if	(memcmp(pRecord+nIndex, strNull, pField->m_nLength+nSLSize) == 0)
		{
			SetItemText(nItem, nSubItem++, " -- ");

			//设置安全级数据
			if	((nSLSize > 0) && 
				 (m_pTable->m_strTableName.CompareNoCase(SYSTEM_TABLE_TEMP) != 0))//memcmp(pRecord+nIndex+pField->m_nLength, strNull, nSLSize) != 0))
				SetItemText(nItem, nSubItem++, " -- ");
		}
		else
		{
			switch(pField->m_nDataType)
			{
			case	DATATYPE_INT:
			case	DATATYPE_UINT:
				int nValue;
				memcpy(&nValue, pRecord+nIndex, pField->m_nLength);
				strTemp.Format("%d", nValue);
				break;
			case	DATATYPE_STRING:
				char str[MAX_RECORD_SIZE];
				memcpy(str, pRecord+nIndex, pField->m_nLength);
				str[pField->m_nLength] = '\0';
				strTemp = str;
				break;
			case	DATATYPE_BOOL:
				BOOL bValue;
				memcpy(&bValue, pRecord+nIndex, pField->m_nLength);
				strTemp = bValue ? "TRUE" : "FALSE";
				break;
			case	DATATYPE_SECLEVEL:
				{
					CSdbms_SecurityLevel sl(pRecord+nIndex, pField->m_nLength);
					strTemp = sl.GetFormatString(&m_pTable->m_SecLevel);
				}
				break;
			default:	ASSERT(FALSE);
			}

			SetItemText(nItem, nSubItem++, strTemp);

			if	((nSLSize > 0) && 
				 (m_pTable->m_strTableName.CompareNoCase(SYSTEM_TABLE_TEMP) != 0))//memcmp(pRecord+nIndex+pField->m_nLength, strNull, nSLSize) != 0))
			{
				//读属性的安全级
				CSdbms_SecurityLevel slField(pRecord+nIndex+pField->m_nLength, nSLSize);
				SetItemText(nItem, nSubItem++, slField.GetFormatString(&m_pTable->m_SecLevel));
			}
		}

		nIndex += (pField->m_nLength + nSLSize);
	}
}

void CDemo_TableList::ModifyRecord(BYTE *pRecord)
{
	ASSERT(GetItemCount() > 0);

	DeleteItem(GetItemCount()-1);
	InsertRecord(pRecord);
}