www.pudn.com > 基本GIS系统开发.rar > dbaseview.cpp, change:2005-06-13,size:3875b

// dbaseview.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "Draw.h" 
#include "dbaseview.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CDatabaseView 
 
IMPLEMENT_DYNCREATE(CDatabaseView, CScrollView) 
 
CDatabaseView::CDatabaseView() 
{ 
} 
 
CDatabaseView::~CDatabaseView() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CDatabaseView, CScrollView) 
	//{{AFX_MSG_MAP(CDatabaseView) 
	ON_WM_SIZE() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CDatabaseView drawing 
 
void CDatabaseView::OnInitialUpdate() 
{ 
 
    CDrawDoc* pDoc=GetDocument();   //得到指向当前文档对象的指针 
	m_pSet1=&pDoc->m_data1;         //得到指向记录集合对象的指针 
	CSize sizeTotal; 
	// TODO: calculate the total size of this view 
	Init1(); 
	Init2(); 
	CScrollView::OnInitialUpdate(); 
	//sizeTotal.cx = sizeTotal.cy = 100; 
	SetScrollSizes(MM_TEXT, sizeTotal,sizePage,sizeLine); 
} 
 
void CDatabaseView::OnDraw(CDC* pDC) 
{ 
//	CDocument* pDoc = GetDocument(); 
	// TODO: add draw code here 
	CDrawDoc* pDoc=GetDocument(); 
//	CPen pen(0,1,RGB(255,0,0)); 
	pDC->SetTextColor(RGB(255,0,0)); 
	CString c1; 
	CString& c2=c1; 
	pDC->SetMapMode(1); 
	m_pSet1->MoveFirst(); 
	for(int i=0;i<nRecord;i++) 
	{ 
		for(int j=0;j<nField;j++) 
		{ 
			m_pSet1->GetFieldValue(j,c2); 
			pDC->TextOut(nFieldStart[j],i*nCharHeight,c1); 
		} 
		m_pSet1->MoveNext(); 
	} 
} 
 
void CDatabaseView::Init1() 
{ 
	TEXTMETRIC tm; 
	CDC* dc=GetDC(); 
	dc->GetTextMetrics(&tm); 
	ReleaseDC(dc); 
	nCharHeight=tm.tmHeight+2; 
	nCharWidth=tm.tmAveCharWidth+2; 
	if(m_pSet1->IsOpen()) 
		m_pSet1->Close(); 
    m_pSet1->Open(); 
	nField=m_pSet1->GetODBCFieldCount(); 
	CODBCFieldInfo fieldinfo1; 
	CODBCFieldInfo& fieldinfo=fieldinfo1; 
	for(int i=0;i<nField;i++) 
	{ 
		m_pSet1->GetODBCFieldInfo(i,fieldinfo); 
		nFieldWide[i]=(short)fieldinfo1.m_nPrecision; 
	} 
	nScreenWide=0; 
	nFieldStart[0]=0; 
	for(i=0;i<nField;i++) 
	{ 
		nScreenWide=nScreenWide+nFieldWide[i]*nCharWidth; 
		nFieldStart[i+1]=nFieldStart[i]+nFieldWide[i]*nCharWidth; 
	} 
	sizeTotal.cx=nScreenWide; 
	sizeLine.cx=nCharWidth*5; 
} 
void CDatabaseView::Init2() 
{ 
	if(m_pSet1->IsOpen())  //如果打开了记录集合对象 
		m_pSet1->Close(); 
	m_pSet1->Open(); 
	if(m_pSet1->IsBOF())   //如果记录指针指向记录集合范围外，即记录集合不包含记录 
		nRecord=0; 
	else 
	{ 
		m_pSet1->MoveFirst(); 
		nRecord=0; 
		while(!m_pSet1->IsBOF())  //直到指向最后一条记录范围外 
		{ 
			m_pSet1->MoveNext(); 
			nRecord++; 
		} 
	} 
	nScreenHeight=nRecord*nCharHeight; 
	if(nScreenHeight==0) 
		nScreenHeight=20; 
	sizeTotal.cy=nScreenHeight; 
	sizeLine.cy=nCharHeight+2; 
//	if(nRecord>0)          //添加的与编辑功能有关的代码 
//	{ 
//		if(nIndex<1||nIndex>nRecord)  //如果记录指针指向记录集合的范围外 
//			nIndex=1;                 //将记录指针指向第一条记录 
//	} 
//	else 
//		nIndex=-1; 
	 
} 
///////////////////////////////////////////////////////////////////////////// 
// CDatabaseView diagnostics 
 
#ifdef _DEBUG 
void CDatabaseView::AssertValid() const 
{ 
	CScrollView::AssertValid(); 
} 
 
void CDatabaseView::Dump(CDumpContext& dc) const 
{ 
	CScrollView::Dump(dc); 
} 
CDrawDoc* CDatabaseView::GetDocument() 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDrawDoc))); 
	return (CDrawDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CDatabaseView message handlers 
 
void CDatabaseView::OnSize(UINT nType, int cx, int cy)  
{ 
	CScrollView::OnSize(nType, cx, cy); 
	 
	// TODO: Add your message handler code here 
	sizePage.cx=cx;//设置页滚动区域的宽度 
	sizePage.cy=cy;//高度 
	SetScrollSizes(MM_TEXT,sizeTotal,sizePage,sizeLine);//设置视图滚动范围 
	 
}