www.pudn.com > LZ77.rar > LZWView.cpp

// LZWView.cpp : implementation of the CLZWView class 
// 
 
#include "stdafx.h" 
#include "LZW.h" 
 
#include "LZWDoc.h" 
#include "LZWView.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CLZWView 
 
IMPLEMENT_DYNCREATE(CLZWView, CScrollView) 
 
BEGIN_MESSAGE_MAP(CLZWView, CScrollView) 
	//{{AFX_MSG_MAP(CLZWView) 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CLZWView construction/destruction 
 
CLZWView::CLZWView() 
{ 
	// TODO: add construction code here 
 
} 
 
CLZWView::~CLZWView() 
{ 
} 
 
BOOL CLZWView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
 
	return CScrollView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CLZWView drawing 
 
void CLZWView::OnDraw(CDC* pDC) 
{ 
	CStringArray *log = NULL; 
	int counter, total; 
	long line = 5, indent = 5; 
	CString sline; 
	CRect rc, rcTotal = CRect(0, 0, 0, 0); 
	CLZWDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
	 
	//	Get the log array from the Document class 
	log = pDoc->GetLog(); 
	total = log->GetSize(); 
	pDC->SetBkMode(TRANSPARENT); 
 
	//	Go over each line of the document and print it to the view 
	for (counter = 0; counter < total; counter++) 
	{ 
		//	Calculate the text size (for one line) 
		rc = CRect(0, 0, 0, 0); 
		sline = log->GetAt(counter); 
		pDC->DrawText(sline, &rc, DT_CALCRECT); 
 
		//	Calculate the full recangle size of the written document 
		//	This is for reseting the scroll bars values, so we can use 
		//	them to scroll ove the document 
		if (rc.Width() > rcTotal.Width()) 
			rc.right = rc.right; 
		rcTotal.bottom += rc.bottom; 
 
		//	Change the values for the next line (with spaces from the previous) 
		rc.left = indent; 
		rc.right += 5; 
		rc.top = line; 
		rc.bottom += line; 
 
		line = rc.bottom + 5; 
 
		//	Draw the line text in the view 
		pDC->DrawText(sline, &rc, DT_LEFT | DT_VCENTER); 
	} 
 
	//	Change the view scroll bars, and set the movement sizes to match the 
	//	rows of data 
	SetScrollSizes(MM_TEXT, CSize(rcTotal.Width(), rcTotal.Height()), 
		CSize(10, rc.Height() * 10), CSize(3, rc.Height() * 3)); 
} 
 
void CLZWView::OnInitialUpdate() 
{ 
	CRect rc; 
 
	CScrollView::OnInitialUpdate(); 
 
	GetClientRect(&rc); 
 
	SetScrollSizes(MM_TEXT, CSize(rc.Width(), rc.Height()), CSize(1, 1), CSize(3, 3)); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CLZWView diagnostics 
 
#ifdef _DEBUG 
void CLZWView::AssertValid() const 
{ 
	CScrollView::AssertValid(); 
} 
 
void CLZWView::Dump(CDumpContext& dc) const 
{ 
	CScrollView::Dump(dc); 
} 
 
CLZWDoc* CLZWView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CLZWDoc))); 
	return (CLZWDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CLZWView message handlers 
 
void CLZWView::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint)  
{ 
	CDC *pDC = NULL; 
 
	Invalidate(FALSE); 
	OnDraw((pDC = GetDC())); 
	ReleaseDC(pDC); 
	UNREFERENCED_PARAMETER(pSender); 
	UNREFERENCED_PARAMETER(lHint); 
	UNREFERENCED_PARAMETER(pHint); 
}