clipbmpview.cpp

实效编程百例,包含了用vc开发的各方面的源代码。

// ClipBmpView.cpp : implementation of the CClipBmpView class
//

#include "stdafx.h"
#include "ClipBmp.h"

#include "ClipBmpDoc.h"
#include "ClipBmpView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CClipBmpView

IMPLEMENT_DYNCREATE(CClipBmpView, CView)

BEGIN_MESSAGE_MAP(CClipBmpView, CView)
	//{{AFX_MSG_MAP(CClipBmpView)
		// 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, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CClipBmpView construction/destruction

CClipBmpView::CClipBmpView()
{
	// TODO: add construction code here

}

CClipBmpView::~CClipBmpView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CClipBmpView drawing

void CClipBmpView::OnDraw(CDC* pDC)
{
	CClipBmpDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here

	//取得位图
	CBitmap bmp;
	bmp.LoadBitmap(IDB_BITMAP1);
	BITMAP Bitmap;
	bmp.GetBitmap(&Bitmap);

	//创建内存设备场景
	CDC MemDC;
	MemDC.CreateCompatibleDC(pDC);

	//将位图选入内存设备场景
	CBitmap* pOldBmp = MemDC.SelectObject(&bmp);

	//创建椭圆形裁剪区并选入内存设备场景
	CRgn rgn;
	rgn.CreateEllipticRgn(0,0,Bitmap.bmWidth,Bitmap.bmHeight);
	pDC->SelectClipRgn(&rgn);

	//显示设备场景
	pDC->BitBlt(0,0,Bitmap.bmWidth,Bitmap.bmHeight,&MemDC,0,0,SRCCOPY);

	//还原内存设备场景
	MemDC.SelectObject(pOldBmp);
	MemDC.DeleteDC();

}

/////////////////////////////////////////////////////////////////////////////
// CClipBmpView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CClipBmpView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CClipBmpView message handlers