myview.cpp

来自「由吕军等人著的《Visual C++ 与面向对象程序设计教程》课后习题的源代码」· C++ 代码 · 共 201 行

// MyView.cpp : implementation of the CMyView class
//

#include "stdafx.h"
#include "My.h"

#include "MyDoc.h"
#include "MyView.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_LBUTTONDOWN()
	//}}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_nLinePerPage=40;
}

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
    CRect rect;
	GetClientRect(&rect);
	pDC->Rectangle(rect);
	for(int i=0; i<pDoc->m_nBubbleCount; i++)
		pDC->Ellipse(pDoc->m_rectBubble[i]);
}

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

BOOL CMyView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	CMyDoc *pDoc = GetDocument();
	int nPageCount = pDoc->m_nBubbleCount/m_nLinePerPage;
	if(pDoc->m_nBubbleCount % m_nLinePerPage)
		nPageCount ++;
	pInfo->SetMaxPage(nPageCount);
	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

void CMyView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	CClientDC dc(this);				// 设置设备环境
	OnPrepareDC(&dc);
	if(pDoc->m_nBubbleCount < MAX_BUBBLE)
	{
		int r = rand()%50+10;
		CRect rect(point.x-r, point.y-r, point.x+r, point.y+r);
		InvalidateRect(rect, FALSE);
    	dc.DPtoLP(rect);					// 转换物理坐标为逻辑坐标
		pDoc->m_rectBubble[pDoc->m_nBubbleCount] = rect;// 修改文档数据
		pDoc->m_nBubbleCount++;
    	pDoc->SetModifiedFlag();			// 设置修改标志
	}
	CView::OnLButtonDown(nFlags, point);
}

void CMyView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo) 
{
	// TODO: Add your specialized code here and/or call the base class
	pDC->SetMapMode(MM_TWIPS);
	CView::OnPrepareDC(pDC, pInfo);
}

void CMyView::OnPrint(CDC* pDC, CPrintInfo* pInfo) 
{
	// TODO: Add your specialized code here and/or call the base class
	int nPage  = pInfo->m_nCurPage;			// 当前页号
	int nStart = (nPage-1)*m_nLinePerPage;	// 本页第一行
	int nEnd   = nStart+m_nLinePerPage;		// 本页最后一行
	CFont font;								// 设置字体
	font.CreateFont(-280, 0, 0, 0, 400, FALSE, FALSE, 
					0, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
					CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY,
					DEFAULT_PITCH|FF_MODERN, "Courier New");
	CFont *pOldFont = (CFont *)(pDC->SelectObject(&font));
	CRect rectPaper = pInfo->m_rectDraw;	// 取页面打印矩形
	// 页眉: 页面顶端中央打印文档名称
	CMyDoc *pDoc = GetDocument();
	ASSERT_VALID(pDoc);
 	CString str;
	str.Format("Bubble Report: %s", (LPCSTR)pDoc->GetTitle());
	CSize sizeText = pDC->GetTextExtent(str);
	CPoint point((rectPaper.Width()-sizeText.cx)/2, 0);
	pDC->TextOut(point.x, point.y, str);
	point.x = rectPaper.left;			// 打印页眉下划线
	point.y = rectPaper.top-sizeText.cy;
	pDC->MoveTo(point);
	point.x = rectPaper.right;
	pDC->LineTo(point);
	// 打印表头
	str.Format("%6.6s %6.6s %6.6s %6.6s %6.6s", 
				"Index", "Left", "Top", "Right", "Bottom");
	point.x  = 720;
	point.y -= 720;
	pDC->TextOut(point.x, point.y, str);
	TEXTMETRIC tm;					// 取当前字体有关信息
	pDC->GetTextMetrics(&tm);
	int nHeight = tm.tmHeight+tm.tmExternalLeading;
	point.y -= 360;					// 下移 1/4 英寸
	for(int i=nStart; i<nEnd; i++)	// 打印表体
	{
		if(i >= pDoc->m_nBubbleCount)
			break;
		str.Format("%6d %6d %6d %6d %6d", i+1,
					pDoc->m_rectBubble[i].left,
					pDoc->m_rectBubble[i].top,
					pDoc->m_rectBubble[i].right,
					pDoc->m_rectBubble[i].bottom);
		point.y -= nHeight;
		pDC->TextOut(point.x, point.y, str);
	}
	// 在页面底部中央打印页号
	str.Format("- %d -", nPage);
	sizeText = pDC->GetTextExtent(str);
	point.x  = (rectPaper.Width()-sizeText.cx)/2;
	point.y  = rectPaper.Height()+sizeText.cy;
	pDC->TextOut(point.x, point.y, str);
	// 释放字体对象
	pDC->SelectObject(pOldFont);
	
	//CView::OnPrint(pDC, pInfo);
}