记事本view.cpp

用vc 6.0实现记事本功能, 通过该例可以了解记事本的实现方法.

/************************************************************
  Copyright (C), 1988-1999, Huawei Tech. Co., Ltd.
  FileName: test.cpp
  Author: 陈高维      Version :   1.0       Date:2007.811
  Description:     // 模块描述      
  Version:         // 版本信息
  Function List:   
                       OnCreate()................显示光标
                       OnChar() .................处理键盘事件
					   OnLButtonDown()...........处理鼠标左键事件
    1. -------
  History:         // 历史修改记录
      <author>  <time>   <version >   <desc>
      David    96/10/12     1.0     build this moudle  
***********************************************************/// 记事本View.cpp : implementation of the CMyView class
//

#include "stdafx.h"
#include "记事本.h"

#include "记事本Doc.h"
#include "记事本View.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyView

IMPLEMENT_DYNCREATE(CMyView, CView)

BEGIN_MESSAGE_MAP(CMyView, CView)
	//{{AFX_MSG_MAP(CMyView)
	ON_WM_CREATE()
	ON_WM_CHAR()
	ON_WM_CANCELMODE()
	ON_WM_LBUTTONDOWN()
	ON_WM_CAPTURECHANGED()
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyView construction/destruction

CMyView::CMyView()
{
	// TODO: add construction code here
   m_strline="";           
	m_ptOrigin=0;
}

CMyView::~CMyView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyView drawing

void CMyView::OnDraw(CDC* pDC)
{
	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CMyView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CMyView diagnostics

#ifdef _DEBUG
void CMyView::AssertValid() const
{
	CView::AssertValid();
}

void CMyView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CMyView message handlers

int CMyView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	CClientDC dc(this);
	TEXTMETRIC  tm;
	dc.GetTextMetrics(&tm);                             //获取字符属性
    CreateSolidCaret(tm.tmAveCharWidth/8,tm.tmHeight); //创建光标
	//CBritmap bitmap;
	
	ShowCaret();                                       //显示光标
	return 0;
}

void CMyView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default
	CClientDC dc(this);
	CFont font;
	font.CreatePointFont(300,"华文行楷",NULL);
	CFont *pOldFont=dc.SelectObject(&font);
	TEXTMETRIC tm;
	dc.GetTextMetrics(&tm);
	if(0x0d==nChar)                    //处理回车
	{
		m_strline.Empty();
		m_ptOrigin.y+=tm.tmHeight;
	}
	else if(0x08==nChar)              //处理退格
	{
		COLORREF clr=dc.SetTextColor(dc.GetBkColor());
		dc.TextOut(m_ptOrigin.x,m_ptOrigin.y,m_strline);
		m_strline=m_strline.Left(m_strline.GetLength()-1);
		dc.SetTextColor(clr);
	}
	else                             //追加字符
	{
		m_strline+=nChar;            
	}
	CSize sz=dc.GetTextExtent(m_strline);

	CPoint pt;
	pt.x=m_ptOrigin.x+sz.cx;
	pt.y=m_ptOrigin.y;

	SetCaretPos(pt);
	dc.TextOut(m_ptOrigin.x,m_ptOrigin.y,m_strline);

	dc.SelectObject(pOldFont);

	CView::OnChar(nChar, nRepCnt, nFlags);
	CView::OnChar(nChar, nRepCnt, nFlags);
}

void CMyView::OnCancelMode() 
{
	CView::OnCancelMode();
	
	// TODO: Add your message handler code here
	
}

void CMyView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
    SetCaretPos(point);
	m_strline.Empty();
     m_ptOrigin=point;
	CView::OnLButtonDown(nFlags, point);

 
}

void CMyView::OnCaptureChanged(CWnd *pWnd) 
{
	// TODO: Add your message handler code here
	
	CView::OnCaptureChanged(pWnd);
}