www.pudn.com > chap_03.rar > DipView.cpp

// DipView.cpp : implementation of the CDipView class 
// 
 
#include "stdafx.h" 
#include "Dip.h" 
 
#include "DipDoc.h" 
#include "DipView.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipView 
 
IMPLEMENT_DYNCREATE(CDipView, CScrollView) 
 
BEGIN_MESSAGE_MAP(CDipView, CScrollView) 
	//{{AFX_MSG_MAP(CDipView) 
		// NOTE - the ClassWizard will add and remove mapping macros here. 
		//    DO NOT EDIT what you see in these blocks of generated code! 
	//}}AFX_MSG_MAP 
	// Standard printing commands 
	ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview) 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipView construction/destruction 
 
CDipView::CDipView() 
{ 
	// TODO: add construction code here 
 
} 
 
CDipView::~CDipView() 
{ 
} 
 
BOOL CDipView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
 
	return CScrollView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipView drawing 
 
void CDipView::OnDraw(CDC* pDC) 
{ 
	CDipDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
	if( !pDoc->m_bImageLoaded) 
	{ 
		pDoc->ReadImgToDoc(); 
	} 
	 
	//滚动窗口 
	CSize sizeTotal; 
	sizeTotal.cx = pDoc->m_pDibObject->GetWidth(); 
	sizeTotal.cy = pDoc->m_pDibObject->GetHeight(); 
	SetScrollSizes (MM_TEXT, sizeTotal); 
	 
	//获取客户区尺寸 
	OnPrepareDC(pDC); 
	CRect Rect; 
	GetClientRect( &Rect ); 
	 
	//获取图像宽度及高度 
	int nImageWidth, nImageHeight; 
	nImageWidth = pDoc->m_pDibObject->GetWidth(); 
	nImageHeight = pDoc->m_pDibObject->GetHeight(); 
	 
	//当图像实际尺寸小于窗口尺寸时，将图像放在客户区中间 
	int nX, nY; 
	if( nImageWidth < Rect.Width() ) 
		nX = (Rect.Width() - nImageWidth ) / 2; 
	else 
		nX = 0; 
	 
	if( nImageHeight < Rect.Height() ) 
		nY = (Rect.Height() - nImageHeight ) / 2; 
	else	 
		nY = 0; 
	 
	pDoc->m_pDibObject->Draw(pDC, nX, nY); 
} 
 
void CDipView::OnInitialUpdate() 
{ 
	CScrollView::OnInitialUpdate(); 
 
	CSize sizeTotal; 
	// TODO: calculate the total size of this view 
	sizeTotal.cx = sizeTotal.cy = 100; 
	SetScrollSizes(MM_TEXT, sizeTotal); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipView printing 
 
BOOL CDipView::OnPreparePrinting(CPrintInfo* pInfo) 
{ 
	// default preparation 
	return DoPreparePrinting(pInfo); 
} 
 
void CDipView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add extra initialization before printing 
} 
 
void CDipView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add cleanup after printing 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipView diagnostics 
 
#ifdef _DEBUG 
void CDipView::AssertValid() const 
{ 
	CScrollView::AssertValid(); 
} 
 
void CDipView::Dump(CDumpContext& dc) const 
{ 
	CScrollView::Dump(dc); 
} 
 
CDipDoc* CDipView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDipDoc))); 
	return (CDipDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipView message handlers