textview.cpp

VC深入详解code.rar

// 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("VC++　深入编程");
	CString str;
	str = "VC++　深入编程";
	pDC->TextOut(50,50,str);

	CSize sz = pDC->GetTextExtent(str);

	str.LoadString(IDS_STRINGVC);
	pDC->TextOut(0,200,str);

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

	for(int i=0; i<300; i+=10)
	{
		pDC->MoveTo(0,i);
		pDC->LineTo(300,i);
		pDC->MoveTo(i,0);
		pDC->LineTo(i,300);
	}
}

/////////////////////////////////////////////////////////////////////////////
// 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;
	
/*	//创建设备描述表
	CClientDC dc(this);
	//定义文本信息结构体变量
	TEXTMETRIC tm;
	//获得设备描述表中的文本信息
	dc.GetTextMetrics(&tm);
	//根据字体大小，创建合适的插入符
	CreateSolidCaret(tm.tmAveCharWidth/8, tm.tmHeight);
	//显示插入符
	ShowCaret();
*/
	bitmap.LoadBitmap(IDB_BITMAP1);
	CreateCaret(&bitmap);
	ShowCaret();

	SetTimer(1,100,NULL);
	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());
		dc.TextOut(m_ptOrigin.x,m_ptOrigin.y,m_strLine);
		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) 
{
	//矩形宽度以5个像素递增
	m_nWidth += 5;

	CClientDC dc(this);
	TEXTMETRIC tm;
	dc.GetTextMetrics(&tm);
	CRect rect;
	rect.left = 0;
	rect.top = 200;
	rect.right = m_nWidth;
	rect.bottom = rect.top + tm.tmHeight;

	dc.SetTextColor(RGB(255,0,0));
	CString str;
	str.LoadString(IDS_STRINGVC);
	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(0,255,0));
		dc.TextOut(0,200,str);
	}
	
	CView::OnTimer(nIDEvent);
}