// testView.cpp : implementation of the CTestView class
//

#include "stdafx.h"
#include "test.h"

#include "testDoc.h"
#include "testView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTestView

IMPLEMENT_DYNCREATE(CTestView, CView)

BEGIN_MESSAGE_MAP(CTestView, CView)
	//{{AFX_MSG_MAP(CTestView)
	ON_COMMAND(ID_BIG, OnBig)
	ON_COMMAND(ID_SMALL, OnSmall)
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CTestView construction/destruction

CTestView::CTestView()
{
	// TODO: add construction code here
	filename = "";
	m_picture = NULL;
	size = 1; 

}

CTestView::~CTestView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CTestView drawing

void CTestView::OnDraw(CDC* pDC)
{
	CTestDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	if(m_picture)
	{
		long width;
		long height;
		m_picture->get_Width(&width);			//得到图片的宽
		m_picture->get_Height(&height); 		//得到图片的高
		int nwidth=MulDiv(width,GetDeviceCaps(pDC->GetSafeHdc(),LOGPIXELSX),2540);
		int nheight=MulDiv(height,GetDeviceCaps(pDC->GetSafeHdc(),LOGPIXELSY),2540);
					
		CRect rc;
		GetClientRect(&rc);				//得到窗口大小
		m_picture->Render(pDC->GetSafeHdc(),(rc.Width()-nwidth/size)/2,(rc.Height()-nheight/size)/2,
			nwidth/size,nheight/size,0,height,width,-height,&rc);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CTestView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTestView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTestView message handlers

void CTestView::LoadPicture()
{
	HANDLE hfile=CreateFile(filename,GENERIC_READ,0,NULL,OPEN_EXISTING,0, 	NULL);
	DWORD dfilesize=GetFileSize(hfile,NULL);
	LPVOID p=NULL;
	HGLOBAL h=GlobalAlloc(GMEM_MOVEABLE,dfilesize);
	p=GlobalLock(h);
	DWORD dw=0;
	BOOL bread=ReadFile(hfile,p,dfilesize,&dw,NULL);
	GlobalUnlock(h);
	CloseHandle(hfile);
	LPSTREAM pstm=NULL;
	HRESULT hr=CreateStreamOnHGlobal(h,TRUE,&pstm);
	if(m_picture)
		m_picture->Release();
	hr=::OleLoadPicture(pstm,dfilesize,FALSE,IID_IPicture,(LPVOID 	*)&m_picture);
	pstm->Release();
}

void CTestView::OnBig() 
{
	// TODO: Add your command handler code here
	size=size*0.909;					//图片变大
	Invalidate();
}

void CTestView::OnSmall() 
{
	// TODO: Add your command handler code here
	size=size*1.1;						//图片缩小
	Invalidate();
}

void CTestView::OnFileOpen() 
{
	// TODO: Add your command handler code here
	static char sfile[]="JPEG(*.JPEG;*.JPE;*.JIF;*.JPG)|*.JPEG;*.JPE;*.JIF;*.JPG|BMP Windows位图(*.BMP;*.DIB;*.RLE)|*.BMP;*.DIB;*.RLE|PNG(*.PNG)|*.PNG||";

	CFileDialog dlg(TRUE,"jpg"," ",OFN_ALLOWMULTISELECT,sfile);

	if(IDOK==dlg.DoModal())				//文件打开对话框
	{
		filename=dlg.GetPathName();
		LoadPicture();
	}
	Invalidate();	
}