wzdview.cpp

《vc++扩展编程实例》源码。运用Visual C++ 5.0或6.0的高级编程技巧

// WzdView.cpp : implementation of the CWzdView class
//

#include "stdafx.h"
#include "Wzd.h"

#include "WzdSet.h"
#include "WzdDoc.h"
#include "WzdView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CWzdView

IMPLEMENT_DYNCREATE(CWzdView, CDaoRecordView)

BEGIN_MESSAGE_MAP(CWzdView, CDaoRecordView)
	//{{AFX_MSG_MAP(CWzdView)
	ON_COMMAND(ID_RECORD_ADD, OnRecordAdd)
	ON_COMMAND(ID_RECORD_CANCELEDIT, OnRecordCanceledit)
	ON_COMMAND(ID_RECORD_DELETE, OnRecordDelete)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CDaoRecordView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CDaoRecordView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CDaoRecordView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWzdView construction/destruction

CWzdView::CWzdView()
	: CDaoRecordView(CWzdView::IDD)
{
	//{{AFX_DATA_INIT(CWzdView)
	m_pSet = NULL;
	//}}AFX_DATA_INIT
	m_bAddingRecord=FALSE;

}

CWzdView::~CWzdView()
{
}

void CWzdView::DoDataExchange(CDataExchange* pDX)
{
	CDaoRecordView::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CWzdView)
	DDX_FieldText(pDX, IDC_EDIT1, m_pSet->m_EmployeeID, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT2, m_pSet->m_LastName, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT3, m_pSet->m_Title, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT4, m_pSet->m_Address, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT5, m_pSet->m_City, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT6, m_pSet->m_Country, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT7, m_pSet->m_Notes, m_pSet);
	//}}AFX_DATA_MAP
}

BOOL CWzdView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CDaoRecordView::PreCreateWindow(cs);
}

void CWzdView::OnInitialUpdate()
{
	m_pSet = &GetDocument()->m_wzdSet;
	CDaoRecordView::OnInitialUpdate();

	// make frame the size of the original dialog box
	ResizeParentToFit();

	// get rid of those pesky scroll bars
	SetScrollSizes( MM_TEXT, CSize(20,20));
}

/////////////////////////////////////////////////////////////////////////////
// CWzdView printing

BOOL CWzdView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CWzdView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CWzdView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CWzdView diagnostics

#ifdef _DEBUG
void CWzdView::AssertValid() const
{
	CDaoRecordView::AssertValid();
}

void CWzdView::Dump(CDumpContext& dc) const
{
	CDaoRecordView::Dump(dc);
}

CWzdDoc* CWzdView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CWzdDoc)));
	return (CWzdDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CWzdView database support
CDaoRecordset* CWzdView::OnGetRecordset()
{
	return m_pSet;
}


/////////////////////////////////////////////////////////////////////////////
// CWzdView message handlers


void CWzdView::OnRecordAdd() 
{
	m_bAddingRecord=TRUE;
	m_pSet->AddNew();
	UpdateData(FALSE);
}

void CWzdView::OnRecordCanceledit() 
{
	if (m_bAddingRecord)
		m_pSet->CancelUpdate();
	m_pSet->Move(0);
	m_bAddingRecord=FALSE;
	UpdateData(FALSE);	 
}

void CWzdView::OnRecordDelete() 
{
	try
	{
		m_pSet->Delete();
	}
 	catch(CDaoException* e)
 	{
 		AfxMessageBox(e->m_pErrorInfo->m_strDescription);
 		e->Delete();
	}

	// Move off the record we just deleted
	m_pSet->MoveNext();

	// If we moved off the end of file, move back to last record
	if (m_pSet->IsEOF())
		m_pSet->MoveLast();
	
	// If the recordset is now empty, clear the record we just deleted
	if (m_pSet->IsBOF())
		m_pSet->SetFieldNull(NULL);
	UpdateData(FALSE);
}


BOOL CWzdView::OnMove(UINT nIDMoveCommand) 
{
	m_bAddingRecord=FALSE;
	
	return CDaoRecordView::OnMove(nIDMoveCommand);
}