textview.cpp

该程序实现功能：在VC6.0下的文字编辑功能

// TextView.cpp : implementation of the CTextView class
//

#include "stdafx.h"
#include "Text.h"

#include "TextDoc.h"
#include "TextView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTextView

IMPLEMENT_DYNCREATE(CTextView, CView)

BEGIN_MESSAGE_MAP(CTextView, CView)
	//{{AFX_MSG_MAP(CTextView)
	ON_WM_CREATE()
	ON_WM_CHAR()
	ON_WM_LBUTTONDOWN()
	ON_WM_TIMER()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CTextView construction/destruction

CTextView::CTextView()
{
	// TODO: add construction code here
	m_strLine="";
	m_ptOrigin=0;
	m_nWidth=0;

}

CTextView::~CTextView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CTextView drawing

void CTextView::OnDraw(CDC* pDC)
{
	CTextDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	//CString str("湖北省武汉大学电子信息学院");
	CString str="湖北省武汉大学电子信息学院";
	pDC->TextOut(50,50,str);

	CSize sz=pDC->GetTextExtent(str);  //获得字符串所占的空间大小

	str.LoadString(IDS_WEIXIN);
	pDC->TextOut(50,200,str);

	pDC->BeginPath();   //路径
	pDC->Rectangle(50,50,50+sz.cx,50+sz.cy);
	pDC->EndPath();
	pDC->SelectClipPath(RGN_DIFF);

/*	for(int i=5;i<500;i+=15)
	{
		pDC->MoveTo(0,i);
		pDC->LineTo(500,i);
		pDC->MoveTo(i,0);
		pDC->LineTo(i,500);
	}
*/
}

/////////////////////////////////////////////////////////////////////////////
// CTextView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTextView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTextView message handlers

int CTextView::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);//返回当前设备描述表中的字体信息，并保存在tm中

	CreateSolidCaret(tm.tmAveCharWidth/8,tm.tmHeight);  //创建一般插入符
    //bitmap;  //局部对象，必须在定义为View类的成员变量
	//tmap.LoadBitmap(IDB_BITMAP1);
	//eateCaret(&bitmap);
	
	ShowCaret();
	SetTimer(1,100,NULL);//设置定时器
	return 0;
}

void CTextView::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)
	{
		m_strLine.Empty();
		m_ptOrigin.y+=tm.tmHeight;
	}
	else if(0x08==nChar)
	{
		COLORREF clr=dc.SetTextColor(dc.GetBkColor());   //擦除原来的字符
		dc.TextOut(m_ptOrigin.x,m_ptOrigin.y,m_strLine);  //擦除原来的字符
		m_strLine=m_strLine.Left(m_strLine.GetLength()-1);
		dc.SetTextColor(clr);
	}
	else
	{
		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);
}

void CTextView::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 CTextView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	m_nWidth+=5;

	CClientDC dc(this);
	TEXTMETRIC tm;
	dc.GetTextMetrics(&tm);
	CRect rect;
	rect.left=50;
	rect.top=200;
	rect.right=m_nWidth;
	rect.bottom=rect.top+tm.tmHeight;

	dc.SetTextColor(RGB(0,255,0));
	CString str;
	str.LoadString(IDS_WEIXIN);
	dc.DrawText(str,rect,DT_LEFT);

	rect.top=150;
	rect.bottom=rect.top+tm.tmHeight;
	dc.DrawText(str,rect,DT_RIGHT);

	CSize sz=dc.GetTextExtent(str);
	if(m_nWidth>sz.cx)
	{
		m_nWidth=0;
		dc.SetTextColor(RGB(255,0,0));
		dc.TextOut(50,200,str);
	}

	CView::OnTimer(nIDEvent);
}