testview.cpp

一个用来将网页放缩的JavaScript源码

// 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, CScrollView)

BEGIN_MESSAGE_MAP(CTestView, CScrollView)
	//{{AFX_MSG_MAP(CTestView)
	ON_COMMAND(ID_VIEW_ZOOMIN, OnViewZoomin)
	ON_COMMAND(ID_VIEW_ZOOMOUT, OnViewZoomout)
	//}}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()

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

CTestView::CTestView()
{
	m_zoomScale = 1;
}

CTestView::~CTestView()
{
}

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

	return CScrollView::PreCreateWindow(cs);
}

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

void CTestView::OnDraw(CDC* pDC)
{
	CTestDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	
	pDC->Rectangle(100,100,200,200);
	pDC->Rectangle(250,100,350,200);
	pDC->Rectangle(100,250,200,350);		
	pDC->Rectangle(250,250,350,350);	
}

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

	CSize sizeTotal;
	// TODO: calculate the total size of this view
	sizeTotal.cx = sizeTotal.cy = 100;
	SetScrollSizes(MM_TEXT, sizeTotal);
}

/////////////////////////////////////////////////////////////////////////////
// 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
{
	CScrollView::AssertValid();
}

void CTestView::Dump(CDumpContext& dc) const
{
	CScrollView::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::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo) 
{
	CScrollView::OnPrepareDC(pDC, pInfo);

	pDC->SetMapMode(MM_ANISOTROPIC);

	int xLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSX);
	int yLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSY);
	pDC->SetWindowExt(100,100);
	pDC->SetViewportExt( (int)(xLogPixPerInch*m_zoomScale),
		                 (int)(yLogPixPerInch*m_zoomScale)  );

}

void CTestView::OnViewZoomin() 
{
	m_zoomScale *= 1.3;
	Invalidate();
	
}

void CTestView::OnViewZoomout() 
{
	m_zoomScale /= 1.3;
	Invalidate();
}