scribdoc.cpp

本书分为四大篇。第一篇提出学习MFC程序设计之前的必要基础

// ScribDoc.cpp : implementation of the CScribbleDoc class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1995 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#include "Scribble.h"

#include "ScribDoc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc

IMPLEMENT_DYNCREATE(CScribbleDoc, CDocument)

BEGIN_MESSAGE_MAP(CScribbleDoc, CDocument)
	//{{AFX_MSG_MAP(CScribbleDoc)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc construction/destruction

CScribbleDoc::CScribbleDoc()
{
	// TODO: add one-time construction code here

}

CScribbleDoc::~CScribbleDoc()
{
}

BOOL CScribbleDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;
	InitDocument();
	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc serialization

void CScribbleDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
	}
	else
	{
	}
	m_strokeList.Serialize(ar);
}

/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc diagnostics

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

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

/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc commands

BOOL CScribbleDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
	if (!CDocument::OnOpenDocument(lpszPathName))
		return FALSE;
	InitDocument(); 
	return TRUE;
}

void CScribbleDoc::DeleteContents() 
{
	while (!m_strokeList.IsEmpty())
	{
		delete m_strokeList.RemoveHead();
	}
	CDocument::DeleteContents();
}

void CScribbleDoc::InitDocument()
{
	m_nPenWidth = 20; // default 2 pixel pen width
	// solid, black pen
	m_penCur.CreatePen(PS_SOLID, m_nPenWidth, RGB(0,0,0));
}

CStroke* CScribbleDoc::NewStroke()
{
	CStroke* pStrokeItem = new CStroke(m_nPenWidth);
	m_strokeList.AddTail(pStrokeItem);
	SetModifiedFlag();  // Mark the document as having been modified, for
						// purposes of confirming File Close.
	return pStrokeItem;
}




/////////////////////////////////////////////////////////////////////////////
// CStroke

IMPLEMENT_SERIAL(CStroke, CObject, 1)
CStroke::CStroke()
{
	// This empty constructor should be used by serialization only
}

CStroke::CStroke(UINT nPenWidth)
{
	m_nPenWidth = nPenWidth;
}

void CStroke::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		ar << (WORD)m_nPenWidth;
		m_pointArray.Serialize(ar);
	}
	else
	{
		WORD w;
		ar >> w;
		m_nPenWidth = w;
		m_pointArray.Serialize(ar);
	}
}

BOOL CStroke::DrawStroke(CDC* pDC)
{
	CPen penStroke;
	if (!penStroke.CreatePen(PS_SOLID, m_nPenWidth, RGB(0,0,0)))
		return FALSE;
	CPen* pOldPen = pDC->SelectObject(&penStroke);
	pDC->MoveTo(m_pointArray[0]);
	for (int i=1; i < m_pointArray.GetSize(); i++)
	{
		pDC->LineTo(m_pointArray[i]);
	}

	pDC->SelectObject(pOldPen);
	return TRUE;
}