drawdoc.cpp

这是MFC经典问答书的光盘内容

// DrawDoc.cpp : implementation of the CDrawDoc class
//

#include "stdafx.h"
#include "ModifiedMark.h"

#include "DrawDoc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDrawDoc

IMPLEMENT_DYNCREATE(CDrawDoc, CDocument)

BEGIN_MESSAGE_MAP(CDrawDoc, CDocument)
	//{{AFX_MSG_MAP(CDrawDoc)
	ON_COMMAND(ID_DRAW_SQUARE, OnDrawSquare)
	ON_COMMAND(ID_DRAW_CIRCLE, OnDrawCircle)
	ON_UPDATE_COMMAND_UI(ID_DRAW_SQUARE, OnUpdateDrawSquare)
	ON_UPDATE_COMMAND_UI(ID_DRAW_CIRCLE, OnUpdateDrawCircle)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDrawDoc construction/destruction

CDrawDoc::CDrawDoc()
{
	m_point = CPoint( 30, 30 );
	m_shape = SQUARE;
}

CDrawDoc::~CDrawDoc()
{
}

BOOL CDrawDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)

	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CDrawDoc serialization

void CDrawDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		ar << m_point << (DWORD) m_shape;
	}
	else
	{
		ar >> m_point >> (DWORD&) m_shape;
	}
}

/////////////////////////////////////////////////////////////////////////////
// CDrawDoc diagnostics

#ifdef _DEBUG
void CDrawDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CDrawDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CDrawDoc commands

void CDrawDoc::OnDrawSquare() 
{
	m_shape = SQUARE;
	UpdateAllViews( NULL );
	SetModifiedFlag( TRUE );
}

void CDrawDoc::OnDrawCircle() 
{
	m_shape = CIRCLE;
	UpdateAllViews( NULL );
	SetModifiedFlag( TRUE );
}

void CDrawDoc::OnUpdateDrawSquare(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck( m_shape == SQUARE );
}

void CDrawDoc::OnUpdateDrawCircle(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck( m_shape == CIRCLE );
}

// Overriden to change the document's title
void CDrawDoc::SetModifiedFlag( BOOL bModified )
{
	CString strTitle = GetTitle();

	// Note the space before the "modified" marker:
	// this prevents some problems with the document
	// name in the "Save As" dialog box
	CString strIndicator = " *";

	// 1 - Set the correct title depending on the new
	// state of our document object
	if( !IsModified() && bModified )
	{
		// 1a - Document was "clean", is now "dirty"
		SetTitle( strTitle + strIndicator );
	}
	else if( IsModified() && !bModified )
	{
		// 1b - Document was "dirty", is now "clean"
		SetTitle( strTitle.Left( strTitle.GetLength()
								- strIndicator.GetLength() ) );
	}

	// 2 - Force update of the frame windows titles
	// (this will cause the frame windows to show our
	// new title)
	UpdateFrameCounts();

	// 3 - Finally, call the standard function
	CDocument::SetModifiedFlag( bModified );
}