pictureview.cpp

this walet there is pictures in it you can debug it

// PictureView.cpp : implementation file
//

#include "stdafx.h"
#include "wavelet.h"
#include "PictureView.h"
#include "WaveletDoc.h"
#include "MainFrm.h"

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

/////////////////////////////////////////////////////////////////////////////
// PictureView

IMPLEMENT_DYNCREATE(PictureView, CScrollView)

PictureView::PictureView()
{
}

PictureView::~PictureView()
{
}


BEGIN_MESSAGE_MAP(PictureView, CScrollView)
	//{{AFX_MSG_MAP(PictureView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// PictureView drawing

void PictureView::OnDraw(CDC* pDC)
{
	CWaveletDoc* pDoc = GetDocument();

	unsigned char* pBitmap = pDoc -> m_pBitmap;
	LPBITMAPINFO lpBitmapInfo = (LPBITMAPINFO)(pBitmap + 14);
	unsigned char* pBitmapData = pBitmap + ((LPBITMAPFILEHEADER)pBitmap)->bfOffBits;
	unsigned long biHeight = ((LPBITMAPINFOHEADER)lpBitmapInfo)->biHeight;
	unsigned long biWidth = ((LPBITMAPINFOHEADER)lpBitmapInfo)->biWidth;

	CRect rect;
	GetClientRect(&rect);
	long originx =0;
	long originy =0;
	if((unsigned long)(rect.Width()) > biWidth)
		originx = (rect.Width() - biWidth)>>1;
	if((unsigned long)(rect.Height()) > biHeight)
		originy = (rect.Height() - biHeight)>>1;
	SetDIBitsToDevice(pDC->m_hDC, originx, originy, biWidth, biHeight, 0, 0, 0, biHeight, pBitmapData, 
							lpBitmapInfo, DIB_RGB_COLORS);
}

/////////////////////////////////////////////////////////////////////////////
// PictureView diagnostics

#ifdef _DEBUG
void PictureView::AssertValid() const
{
	CScrollView::AssertValid();
}

void PictureView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}

CWaveletDoc* PictureView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CWaveletDoc)));
	return (CWaveletDoc*)m_pDocument;
}

#endif //_DEBUG



void PictureView::OnInitialUpdate() 
{	CScrollView::OnInitialUpdate();

	CWaveletDoc* pDoc = GetDocument();
	unsigned char* pBitmap = pDoc -> m_pBitmap;
	LPBITMAPINFO lpBitmapInfo = (LPBITMAPINFO)(pBitmap + 14);

	int biHeight = ((LPBITMAPINFOHEADER)lpBitmapInfo)->biHeight;
	int biWidth = ((LPBITMAPINFOHEADER)lpBitmapInfo)->biWidth;

	CSize sizeTotal(biWidth, biHeight);
	SetScrollSizes(MM_TEXT, sizeTotal);
	
	CMainFrame* pAppFrame = (CMainFrame*) AfxGetApp()->m_pMainWnd;
	ASSERT_KINDOF(CMainFrame, pAppFrame);
	CRect rc;
	pAppFrame->GetClientRect(&rc);
	if (rc.Width() >= sizeTotal.cx && rc.Height() >= sizeTotal.cy &&
		(sizeTotal.cx>0 || sizeTotal.cy>0))
		ResizeParentToFit(FALSE);
	return;
}