bch_codingview.cpp

bch 编码的源代码 用vc写的 供大家参考使用

// BCH_CodingView.cpp : implementation of the CBCH_CodingView class
//

#include "stdafx.h"
#include "BCH_Coding.h"

#include "BCH_CodingDoc.h"
#include "BCH_CodingView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBCH_CodingView

IMPLEMENT_DYNCREATE(CBCH_CodingView, CScrollView)

BEGIN_MESSAGE_MAP(CBCH_CodingView, CScrollView)
	//{{AFX_MSG_MAP(CBCH_CodingView)
	ON_WM_SIZE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBCH_CodingView construction/destruction

CBCH_CodingView::CBCH_CodingView()
{
	// TODO: add construction code here

}

CBCH_CodingView::~CBCH_CodingView()
{
}

BOOL CBCH_CodingView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	SetScrollSizes(MM_TEXT, CSize(0, 0));
	return CScrollView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CBCH_CodingView drawing

void CBCH_CodingView::OnDraw(CDC* pDC)
{
	CBCH_CodingDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	
	if (pDoc->LFileData.GetCount() != 0)
	{
		CString		str;
		TEXTMETRIC	tm;
		
		POSITION	pos = pDoc->LFileData.GetHeadPosition();
		pDoc->LFileData.GetNext(pos);

		uint8_t		data = pDoc->LFileData.GetHead();
		uint32_t	i, j;
		
		uint64_t	lines;
		if (pDoc->file_size % 16 != 0)
			lines = pDoc->file_size / 16 + 1;
		else lines = pDoc->file_size / 16;

		pDC->GetTextMetrics(&tm);
		pDC->SetTextColor(RGB(100, 100, 100));
		
		text_x = 0;
		text_y = 0;
		char buffer[3];
		CString str_temp;
		for (i = 0; i < lines; i++)
		{		
			//显示行标
			if (i <= 0x0f) 
				str.Format("00%x0h: ", i);
			else if (i > 0x0f && i <= 0xff)
			{
				itoa(i, buffer, 16);
				str_temp = buffer;
				str.Format("0%s0h: ", str_temp);
			}
			else if (i > 0xff && i <= 0x0fff)
			{
				uint8_t temp = (uint8_t)(i / 256);
				itoa(temp, buffer, 16);
				str = "0x";
				str += buffer;
				temp = (uint8_t)(i % 256);
				itoa(temp, buffer, 16);
				if (temp <= 0x0f)
					str += '0';
				str += buffer;
				str += "0h: ";
			}
			else str = "";
			pDC->TextOut(text_x, text_y, str);
			text_x += tm.tmAveCharWidth * 7;
			
			//文件转化成16进制显示
			if (i == lines - 1)
			{
				for (j = 0; j < lines % 16; j++)
				{
					if (data <= 0x0f) str.Format("0%x", data);
					else str.Format("%x", data);
					str.MakeUpper();
					pDC->TextOut(text_x, text_y, str);
					text_x += tm.tmAveCharWidth * 3;
					data = pDoc->LFileData.GetAt(pos);
					pDoc->LFileData.GetNext(pos);
				}
			}
			else 
			{
				for (j = 0; j < 16; j++)
				{
					if (data <= 0x0f) str.Format("0%x", data);
					else str.Format("%x", data);
					str.MakeUpper();
					pDC->TextOut(text_x, text_y, str);
					text_x += tm.tmAveCharWidth * 3;
					data = pDoc->LFileData.GetAt(pos);
					pDoc->LFileData.GetNext(pos);
				}
			}
			text_x = 0;
			text_y += (uint16_t)tm.tmHeight;	
		}
	}
}

void CBCH_CodingView::UpdateScrollSizes()
{
 	CClientDC pDC(this);
	TEXTMETRIC tm;
	pDC.GetTextMetrics(&tm);
	CBCH_CodingDoc* pDoc = GetDocument();
	if (pDoc == NULL) return;
	int x_page, y_page;

	CRect rect;
	GetClientRect(&rect);
	
	POSITION pos = pDoc->LFileData.GetHeadPosition();
	if(pos != NULL)
	{
		x_total = 54 * tm.tmAveCharWidth;	//得到要显示文件的行和列的象素
		y_total = max((uint32_t)rect.bottom, tm.tmHeight * (pDoc->file_size / 32 + 1));
		CSize sizeTotal(x_total, y_total);
		
		x_page = x_total / 5;
		y_page = rect.bottom - tm.tmHeight;	
		CSize sizePage(x_page, y_page);

		CSize sizeLine(tm.tmAveCharWidth, tm.tmHeight); 
		SetScrollSizes(MM_TEXT, sizeTotal, sizePage, sizeLine);
	}
	else
		return;
}

/////////////////////////////////////////////////////////////////////////////
// CBCH_CodingView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CBCH_CodingView message handlers

void CBCH_CodingView::OnSize(UINT nType, int cx, int cy) 
{
	UpdateScrollSizes();
	CScrollView::OnSize(nType, cx, cy);
	// TODO: Add your message handler code here
}