bitmapview.cpp

如何实现位图的加载显示

// BITMAPView.cpp : CBITMAPView 类的实现
//

#include "stdafx.h"
#include "BITMAP.h"

#include "BITMAPDoc.h"
#include "BITMAPView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CBITMAPView

IMPLEMENT_DYNCREATE(CBITMAPView,  CView)

BEGIN_MESSAGE_MAP(CBITMAPView, CView)
	// 标准打印命令
	ON_COMMAND(ID_FILE_PRINT, &CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, &CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, &CView::OnFilePrintPreview)
	ON_WM_ERASEBKGND()
END_MESSAGE_MAP()

// CBITMAPView 构造/析构

CBITMAPView::CBITMAPView()
{
	// TODO: 在此处添加构造代码
	

}

CBITMAPView::~CBITMAPView()
{
}

BOOL CBITMAPView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: 在此处通过修改
	//  CREATESTRUCT cs 来修改窗口类或样式

	return CView::PreCreateWindow(cs);
}

// CBITMAPView 绘制

void CBITMAPView::OnDraw(CDC* /*pDC*/)
{
	CBITMAPDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	if (!pDoc)
		return;

	// TODO: 在此处为本机数据添加绘制代码
}


// CBITMAPView 打印

BOOL CBITMAPView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// 默认准备
	return DoPreparePrinting(pInfo);
}

void CBITMAPView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 添加额外的打印前进行的初始化过程
}

void CBITMAPView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 添加打印后进行的清理过程
}


// CBITMAPView 诊断

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

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

CBITMAPDoc* CBITMAPView::GetDocument() const // 非调试版本是内联的
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CBITMAPDoc)));
	return (CBITMAPDoc*)m_pDocument;
}
#endif //_DEBUG


// CBITMAPView 消息处理程序

BOOL CBITMAPView::OnEraseBkgnd(CDC* pDC)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值

	CBitmap bitmap;
	bitmap.LoadBitmap(IDB_BITMAP1);
	CDC dcCompatible;
	dcCompatible.CreateCompatibleDC(pDC);
	dcCompatible.SelectObject(&bitmap);
	RECT rect;
	GetClientRect(&rect);
	BITMAP bmp;
	bitmap.GetBitmap(&bmp);

	pDC->StretchBlt(rect.left,rect.top,rect.right,rect.bottom,&dcCompatible,rect.left,rect.top,bmp.bmWidth,bmp.bmHeight,SRCCOPY);

	//pDC->BitBlt(rect.left,rect.top,rect.right,rect.bottom,&dcCompatible,0,0,SRCCOPY);

    return TRUE;

	//return CView::OnEraseBkgnd(pDC);
}