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Resource ID Organiser Add-In for Visual C++ 5.0/6.0/.NET

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An application/add-in to organise and renumber resource symbol IDs
// CJHexEdit.cpp : implementation file
// Copyright � 1998-1999 CodeJock.com, All Rights Reserved.
// See ReadMe.txt for TERMS OF USE.
//
// Based on the article "HexEdit Control" by Andreas Saurwein [saurwein@uniwares.com]
// http://www.codeguru.com/editctrl/hexeditctrl.shtml
//
/////////////////////////////////////////////////////////////////////////////
/****************************************************************************
 *
 * $Date: 24/05/02 13:53 $
 * $Revision: 2 $
 * $Archive: /Projects/AddIns/ResOrg/CJLibrary/CJLibrary/CJHexEdit.cpp $
 *
 * $History: CJHexEdit.cpp $
 * 
 * *****************  Version 2  *****************
 * User: Andy         Date: 24/05/02   Time: 13:53
 * Updated in $/Projects/AddIns/ResOrg/CJLibrary/CJLibrary
 * Modifications for compatibility with Visual Studio.NET
 * 
 * *****************  Version 2  *****************
 * User: Kirk Stowell Date: 10/30/99   Time: 9:50p
 * Updated in $/CodeJock/CJLibrary
 * 
 * *****************  Version 1  *****************
 * User: Kirk Stowell Date: 10/30/99   Time: 9:20p
 * Created in $/CodeJock/CJLibrary
 *
 ***************************************************************************/
/////////////////////////////////////////////////////////////////////////////

#include "StdAfx.h"
#include "CJResource.h"
#include "CJHexEdit.h"
#include <ctype.h>
#include <afxole.h>
#include <afxdisp.h>

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

char hextable[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
#define TOHEX(a, b)	{*b++ = hextable[a >> 4];*b++ = hextable[a&0xf];}

/////////////////////////////////////////////////////////////////////////////
// CCJHexEdit

CCJHexEdit::CCJHexEdit()
{
	m_pData			= NULL;		// pointer to data
	m_length		= 0;		// length of data
	m_length		= 0x40;
	m_topindex		= 0;
	m_bpr			= 8;		// byte per row 
	m_lpp			= 1;

	m_bShowHex		= TRUE;
	m_bShowAscii	= TRUE;
	m_bShowAddress	= TRUE;
	m_bAddressIsWide= TRUE;		// 4/8 byte address

	m_offAddress	= 0;
	m_offHex		= 0;
	m_offAscii		= 0;

	m_bUpdate = TRUE;			// update font info
	m_bNoAddressChange = FALSE;
	m_currentMode = EDIT_NONE;

	m_editPos.x = m_editPos.y = 0;
	m_currentAddress = 0;
	m_bHalfPage = TRUE;

	m_selStart	= 0xffffffff;
	m_selEnd	= 0xffffffff;

	m_Font.CreateFont(-12, 0,0,0,0,0,0,0,0,0,0,0,0, _T("Courier New"));

	AfxOleInit();
}

CCJHexEdit::~CCJHexEdit()
{
	m_Font.DeleteObject();
}

IMPLEMENT_DYNAMIC(CCJHexEdit, CEdit)

BEGIN_MESSAGE_MAP(CCJHexEdit, CEdit)
	//{{AFX_MSG_MAP(CCJHexEdit)
	ON_WM_CHAR()
	ON_WM_KILLFOCUS()
	ON_WM_PAINT()
	ON_WM_SETFOCUS()
	ON_WM_VSCROLL()
	ON_WM_GETDLGCODE()
	ON_WM_ERASEBKGND()
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_WM_KEYDOWN()
	ON_COMMAND(ID_EDIT_CLEAR, OnEditClear)
	ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
	ON_COMMAND(ID_EDIT_CUT, OnEditCut)
	ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
	ON_COMMAND(ID_EDIT_SELECT_ALL, OnEditSelectAll)
	ON_COMMAND(ID_EDIT_UNDO, OnEditUndo)
	ON_WM_CONTEXTMENU()
	ON_WM_HSCROLL()
	ON_WM_LBUTTONDBLCLK()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCJHexEdit message handlers

void CCJHexEdit::OnPaint() 
{
	CPaintDC dc(this); // device context for painting

	// KStowell - Get the client rect.
	CRect rcClient;
	GetClientRect( &rcClient );

	// KStowell - Create a memory device-context. This is done to help reduce
	// screen flicker, since we will paint the entire control to the
	// off screen device context first.
	CDC memDC;
	CBitmap bitmap;
	memDC.CreateCompatibleDC(&dc);
	bitmap.CreateCompatibleBitmap(&dc, rcClient.Width(), rcClient.Height());
	CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);

	// KStowell - Repaint the background.
	memDC.FillSolidRect( rcClient, ::GetSysColor(COLOR_WINDOW) );

	ASSERT(m_currentAddress >= 0);
	ASSERT(m_topindex >= 0);

	CFont* pOldFont = memDC.SelectObject(&m_Font);
	int		height		= 0;
	int		x,y;
	TCHAR	buf[256];
	
	x = rcClient.TopLeft().x;
	y = rcClient.TopLeft().y;
	
	memDC.SetBoundsRect(&rcClient, DCB_DISABLE);
	
	if(m_pData)
	{
		//
		// get char dimensions
		//
		if(m_bUpdate)
		{
			memDC.GetCharWidth('0', '0', &m_nullWidth);
			CSize sz = memDC.GetTextExtent(_T("0"), 1);
			m_lineHeight = sz.cy;
			
			m_offHex	= m_bShowAddress ? (m_bAddressIsWide ? m_nullWidth * 9 : m_nullWidth * 5) : 0;
			m_offAscii	= m_bShowAddress ? (m_bAddressIsWide ? m_nullWidth * 9 : m_nullWidth * 5) : 0;
			m_offAscii += m_bShowHex	 ? (m_bpr * 3 * m_nullWidth) : 0;
			
			m_lpp = rcClient.Height() / m_lineHeight;
			m_bHalfPage = FALSE;
			if(m_lpp * m_bpr > m_length)
			{
				m_lpp = (m_length + (m_bpr/2)) / m_bpr ;
				if(m_length % m_bpr != 0)
				{
					m_bHalfPage = TRUE;
					m_lpp++;
				}
			}
			m_bUpdate = FALSE;
			UpdateScrollbars();
		}
		
		height = rcClient.Height() / m_lineHeight;
		height *= m_lineHeight;
		
		if(m_bShowAddress)
		{
			TCHAR fmt[8] = {'%','0','8','l','X'};
			fmt[2] = m_bAddressIsWide ? '8' : '4';
			int w = m_bAddressIsWide ? 8 : 4;
			y = 0;
			CRect rcd = rcClient;
			rcd.TopLeft().x = m_offAddress;
			for(int	 i = m_topindex; (i < m_length) && (rcd.TopLeft().y < height); i+= m_bpr)
			{
				_stprintf(buf, fmt, i);
				memDC.DrawText(buf, w, rcd, DT_LEFT|DT_TOP|DT_SINGLELINE|DT_NOPREFIX);
				rcd.TopLeft().y += m_lineHeight;
			}
		}
		if(m_bShowHex)
		{
			y = 0;
			CRect rcd = rcClient;
			rcd.TopLeft().x = x = m_offHex;
			
			if(m_selStart != 0xffffffff && (m_currentMode == EDIT_HIGH || m_currentMode == EDIT_LOW))
			{
				int	 i;
				int	 n = 0;
				int	 selStart = m_selStart, selEnd = m_selEnd;
				if(selStart > selEnd)
					selStart ^= selEnd ^= selStart ^= selEnd;
				
				for(i = m_topindex; (i < selStart) && (y < height); i++)
				{
					LPTSTR p = &buf[0];
					
					TOHEX(m_pData[i], p);
					
					*p++ = ' ';
					memDC.TextOut(x, y, buf, 3);
					x += m_nullWidth * 3;
					n++;
					if(n == m_bpr)
					{
						n = 0;
						x = m_offHex;
						y += m_lineHeight;
					}
				}
				
				memDC.SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT));
				memDC.SetBkColor(GetSysColor(COLOR_HIGHLIGHT));
				for(; (i < selEnd) && (i < m_length) && (y < height); i++)
				{
					LPTSTR p = &buf[0];
					
					TOHEX(m_pData[i], p);
					
					*p++ = ' ';
					memDC.TextOut(x, y, buf, 3);
					x += m_nullWidth * 3;
					n++;
					if(n == m_bpr)
					{
						n = 0;
						x = m_offHex;
						y += m_lineHeight;
					}
				}
				memDC.SetTextColor(GetSysColor(COLOR_WINDOWTEXT));
				memDC.SetBkColor(GetSysColor(COLOR_WINDOW));
				for(; (i < m_length) && (y < height); i++)
				{
					LPTSTR p = &buf[0];
					
					TOHEX(m_pData[i], p);
					
					*p++ = ' ';
					memDC.TextOut(x, y, buf, 3);
					x += m_nullWidth * 3;
					n++;
					if(n == m_bpr)
					{
						n = 0;
						x = m_offHex;
						y += m_lineHeight;
					}
				}
			}
			else
			{
				for(int	 i = m_topindex; (i < m_length) && (rcd.TopLeft().y < height);)
				{
					LPTSTR p = &buf[0];
					
					for(int	 n = 0; (n < m_bpr) && (i < m_length); n++)
					{
						TOHEX(m_pData[i], p);
						*p++ = ' ';
						i++;
					}
					
					while(n < m_bpr)
					{
						*p++ = ' ';	*p++ = ' ';	*p++ = ' ';
						n++;
					}
					
					memDC.DrawText(buf, m_bpr*3, rcd, DT_LEFT|DT_TOP|DT_SINGLELINE|DT_NOPREFIX);
					rcd.TopLeft().y += m_lineHeight;
				}
			}
		}
		if(m_bShowAscii)
		{
			y = 0;
			CRect rcd = rcClient;
			rcd.TopLeft().x = x = m_offAscii;
			if(m_selStart != 0xffffffff && m_currentMode == EDIT_ASCII)
			{
				int	 i;
				int	 n = 0;
				int	 selStart = m_selStart, selEnd = m_selEnd;
				if(selStart > selEnd)
					selStart ^= selEnd ^= selStart ^= selEnd;
				
				for(i = m_topindex; (i < selStart) && (y < height); i++)
				{
					buf[0] = isprint(m_pData[i]) ? m_pData[i] : '.';
					memDC.TextOut(x, y, buf, 1);
					x += m_nullWidth;
					n++;
					if(n == m_bpr)
					{
						n = 0;
						x = m_offAscii;
						y += m_lineHeight;
					}
				}
				memDC.SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT));
				memDC.SetBkColor(GetSysColor(COLOR_HIGHLIGHT));
				for(; (i < selEnd) && (y < height); i++)
				{
					buf[0] = isprint(m_pData[i]) ? m_pData[i] : '.';
					memDC.TextOut(x, y, buf, 1);
					x += m_nullWidth;
					n++;
					if(n == m_bpr)
					{
						n = 0;
						x = m_offAscii;
						y += m_lineHeight;
					}
				}
				memDC.SetTextColor(GetSysColor(COLOR_WINDOWTEXT));
				memDC.SetBkColor(GetSysColor(COLOR_WINDOW));
				for(; (i < m_length) && y < height; i++)
				{
					buf[0] = isprint(m_pData[i]) ? m_pData[i] : '.';
					memDC.TextOut(x, y, buf, 1);
					x += m_nullWidth;
					n++;
					if(n == m_bpr)
					{
						n = 0;
						x = m_offAscii;
						y += m_lineHeight;
					}
				}
			}
			else
			{
				for(int	 i = m_topindex; (i < m_length) && (rcd.TopLeft().y < height);)
				{
					LPTSTR p = &buf[0];
					
					for(int	 n = 0; (n < m_bpr) && (i < m_length); n++)
					{
						*p++ = isprint(m_pData[i]) ? m_pData[i] : '.';
						i++;
					}
					
					memDC.DrawText(buf, n, rcd, DT_LEFT|DT_TOP|DT_SINGLELINE|DT_NOPREFIX);
					rcd.TopLeft().y += m_lineHeight;
				}
			}
		}
	}

	// KStowell - Copy the memory device context back into the original DC via BitBlt().
	dc.BitBlt(rcClient.left, rcClient.top, rcClient.Width(), rcClient.Height(), &memDC, 0,0, SRCCOPY);

	// KStowell - Cleanup resources.
	memDC.SelectObject(pOldBitmap);
	memDC.SelectObject(pOldFont);
	memDC.DeleteDC();
	bitmap.DeleteObject();
}

void CCJHexEdit::OnSetFocus(CWnd* pOldWnd) 
{
	if(m_pData && !IsSelected())
	{
		if(m_editPos.x == 0 && m_bShowAddress)
			CreateAddressCaret();
		else
			CreateEditCaret();
		SetCaretPos(m_editPos);
		ShowCaret();
	}
	CWnd::OnSetFocus(pOldWnd);
}

void CCJHexEdit::OnKillFocus(CWnd* pNewWnd) 
{
	DestroyCaret();
	CWnd::OnKillFocus(pNewWnd);
}

void CCJHexEdit::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	UNUSED_ALWAYS(pScrollBar);

	if(!m_pData) {
		return;
	}

	int oa = m_topindex;
	switch(nSBCode)
	{
		case SB_LINEDOWN:
			if(m_topindex < m_length - m_lpp*m_bpr)
			{
				m_topindex += m_bpr;
				RedrawWindow();
			}
			break;
		
		case SB_LINEUP:
			if(m_topindex > 0)
			{
				m_topindex -= m_bpr;
				RedrawWindow();
			}
			break;
		
		case SB_PAGEDOWN:
			if(m_topindex < m_length - m_lpp*m_bpr)
			{
				m_topindex += m_bpr * m_lpp;
				if(m_topindex > m_length - m_lpp*m_bpr)
					m_topindex = m_length - m_lpp*m_bpr;
				RedrawWindow();
			}
			break;

		case SB_PAGEUP:
			if(m_topindex > 0)
			{
				m_topindex -= m_bpr * m_lpp;
				if(m_topindex < 0)
					m_topindex = 0;
				RedrawWindow();
			}
			break;

		case SB_THUMBTRACK:
			m_topindex = nPos * m_bpr;
			RedrawWindow();
			break;
	}
	::SetScrollPos(this->m_hWnd, SB_VERT, m_topindex / m_bpr, TRUE);
	if(!m_bNoAddressChange)
		m_currentAddress += (m_topindex - oa);
	RepositionCaret(m_currentAddress);
}

BOOL CCJHexEdit::PreCreateWindow(CREATESTRUCT& cs) 
{
	if(!CEdit::PreCreateWindow(cs)) {
		return FALSE;
	}

	cs.style |= WS_HSCROLL|WS_VSCROLL;
	return TRUE;
}

BOOL CCJHexEdit::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext) 
{
	if(!CWnd::Create(lpszClassName, lpszWindowName, dwStyle, rect, pParentWnd, nID, pContext)) {
		return FALSE;
	}

	SetFont(&m_Font);
	return TRUE;
}

BOOL CCJHexEdit::OnEraseBkgnd(CDC* pDC) 
{
	// KStowell - overridden for flicker-free drawing.
	UNUSED_ALWAYS(pDC);
	return TRUE;
}

void CCJHexEdit::OnLButtonDown(UINT nFlags, CPoint point) 
{
	SetFocus();
	if(!m_pData)
		return;

	if(nFlags & MK_SHIFT)
	{
		m_selStart = m_currentAddress;
	}
	CPoint pt = CalcPos(point.x, point.y);
	if(pt.x > -1)
	{
		m_editPos = pt;
		pt.x *= m_nullWidth;
		pt.y *= m_lineHeight;
		
		if(pt.x == 0 && m_bShowAddress)
			CreateAddressCaret();
		else
			CreateEditCaret();

		SetCaretPos(pt);
		if(nFlags & MK_SHIFT)
		{
			m_selEnd = m_currentAddress;
			if(m_currentMode == EDIT_HIGH || m_currentMode == EDIT_LOW)
				m_selEnd++;
			RedrawWindow();
		}
	}
	if(!(nFlags & MK_SHIFT))
	{
		if (::DragDetect(this->m_hWnd, point) )
		{
			m_selStart = m_currentAddress;
			m_selEnd   = m_selStart;
			SetCapture();
		}
		else
		{
			BOOL bsel = m_selStart != 0xffffffff;

			m_selStart = 0xffffffff;
			m_selEnd   = 0xffffffff;
			if(bsel)
				RedrawWindow();
		}
	}
	if(!IsSelected())
	{
		ShowCaret();
	}
}

CPoint CCJHexEdit::CalcPos(int x, int y)
{
	y /= m_lineHeight;
	if(y < 0 || y > m_lpp)
		return CPoint(-1, -1);

	if(y * m_bpr > m_length)
		return CPoint(-1, -1);

	x += m_nullWidth;
	x /= m_nullWidth;

	int xp;

	if(m_bShowAddress && x <= (m_bAddressIsWide ? 8 : 4))
	{
		m_currentAddress = m_topindex + (m_bpr * y);
		m_currentMode = EDIT_NONE;
		return CPoint(0, y);
	}

	xp = (m_offHex  / m_nullWidth) + m_bpr * 3;
	if(m_bShowHex && x < xp)
	{
		if(x%3)
			x--;
		m_currentAddress = m_topindex + (m_bpr * y) + (x - (m_offHex  / m_nullWidth)) / 3;
		m_currentMode =  ((x%3) & 0x01) ? EDIT_LOW : EDIT_HIGH;
		return CPoint(x, y);
	}

	xp = (m_offAscii  / m_nullWidth) + m_bpr;
	if(m_bShowAscii && x < xp)
	{
		m_currentAddress = m_topindex + (m_bpr * y) + (x - (m_offAscii  / m_nullWidth));
		m_currentMode = EDIT_ASCII;
		return CPoint(x, y);
	}

	return CPoint(-1,-1);
}

void CCJHexEdit::CreateAddressCaret()
{
	DestroyCaret();
	CreateSolidCaret(m_nullWidth * (m_bAddressIsWide ? 8 : 4), m_lineHeight);
}

void CCJHexEdit::CreateEditCaret()
{
	DestroyCaret();
	CreateSolidCaret(m_nullWidth, m_lineHeight);
}

void CCJHexEdit::OnMouseMove(UINT nFlags, CPoint point) 
{
	if(!m_pData) {
		return;
	}

	if(nFlags & MK_LBUTTON && m_selStart != 0xffffffff)
	{
		CRect rc;
		GetClientRect(&rc);
		if(!rc.PtInRect(point))
		{
			if(point.y < 0)
			{
				OnVScroll(SB_LINEUP, 0, NULL);
				point.y = 0;
			}
			else if(point.y > rc.Height())
			{
				OnVScroll(SB_LINEDOWN, 0, NULL);
				point.y = rc.Height() -1;
			}
		}

		//
		// we are selecting
		//
		int	 seo = m_selEnd;
		CPoint pt = CalcPos(point.x, point.y);
		if(pt.x > -1)
		{
			m_selEnd = m_currentAddress;
			if(m_currentMode == EDIT_HIGH || m_currentMode == EDIT_LOW)
				m_selEnd++;
		}
		if(IsSelected())
			DestroyCaret();

		if(seo != m_selEnd)
			RedrawWindow();
	}
}

void CCJHexEdit::UpdateScrollbars()
{
	SCROLLINFO si;

	si.cbSize = sizeof(SCROLLINFO);
	si.fMask = SIF_ALL;
	si.nMin = 0;
	si.nMax = (m_length / m_bpr) - 1;
	si.nPage = m_lpp;
	si.nPos = m_topindex / m_bpr;

	::SetScrollInfo(this->m_hWnd, SB_VERT, &si, TRUE);
	if(si.nMax > (int)si.nPage)
		::EnableScrollBar(this->m_hWnd, SB_VERT, ESB_ENABLE_BOTH);

	CRect rc;
	GetClientRect(&rc);

	si.nMin = 0;
	si.nMax =((m_bShowAddress ? (m_bAddressIsWide ? 8 : 4) : 0) +
			  (m_bShowHex ? m_bpr * 3 : 0) +
			  (m_bShowAscii ? m_bpr : 0) ) * m_nullWidth;
	si.nPage = 1;
	si.nPos = 0;
	::SetScrollInfo(this->m_hWnd, SB_HORZ, &si, TRUE);
}

void CCJHexEdit::OnLButtonUp(UINT nFlags, CPoint point) 
{
	if(IsSelected()) {
		ReleaseCapture();
	}

	CWnd::OnLButtonUp(nFlags, point);
}

void CCJHexEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	nFlags;nRepCnt;
	if(!m_pData)
		return;
	if(nChar == '\t')
		return;
	if(GetKeyState(VK_CONTROL) & 0x80000000)
	{
		switch(nChar)
		{
			case 0x03:
				if(IsSelected())
					OnEditCopy();
				return;
			case 0x16:
				OnEditPaste();
				return;
			case 0x18:
				if(IsSelected())
					OnEditCut();
				return;
			case 0x1a:
				OnEditUndo();
				return;
		}
	}

	if(nChar == 0x08)
	{
		if(m_currentAddress > 0)
		{
			m_currentAddress--;
			SelDelete(m_currentAddress, m_currentAddress+1);
			RepositionCaret(m_currentAddress);
			RedrawWindow();
		}
		return;
	}

	SetSel(-1, -1);
	switch(m_currentMode)
	{
		case EDIT_NONE:
			return;
		case EDIT_HIGH:
		case EDIT_LOW:
			if((nChar >= '0' && nChar <= '9') || (nChar >= 'a' && nChar <= 'f'))
			{
				UINT b = nChar - '0';
				if(b > 9) 
					b = 10 + nChar - 'a';

				if(m_currentMode == EDIT_HIGH)
				{
					m_pData[m_currentAddress] = (unsigned char)((m_pData[m_currentAddress] & 0x0f) | (b << 4));
				}
				else
				{
					m_pData[m_currentAddress] = (unsigned char)((m_pData[m_currentAddress] & 0xf0) | b);
				}
				Move(1,0);
			}
			break;
		case EDIT_ASCII:
			m_pData[m_currentAddress] = (unsigned char)nChar;
			Move(1,0);
			break;
	}
	RedrawWindow();
}

void CCJHexEdit::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	nFlags;	nRepCnt;

	BOOL bShift = GetKeyState(VK_SHIFT) & 0x80000000;
	BOOL bac = m_bNoAddressChange;
	m_bNoAddressChange = TRUE;
	switch(nChar)
	{
		case VK_DOWN:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				Move(0,1);
				m_selEnd   = m_currentAddress;
				if(m_currentMode == EDIT_HIGH || m_currentMode == EDIT_LOW)
					m_selEnd++;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			Move(0,1);
			break;
		case VK_UP:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				Move(0,-1);
				m_selEnd   = m_currentAddress;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			Move(0,-1);
			break;
		case VK_LEFT:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				Move(-1,0);
				m_selEnd   = m_currentAddress;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			Move(-1,0);
			break;
		case VK_RIGHT:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				Move(1,0);
				m_selEnd   = m_currentAddress;
				if(m_currentMode == EDIT_HIGH || m_currentMode == EDIT_LOW)
					m_selEnd++;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			Move(1,0);
			break;
		case VK_PRIOR:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				OnVScroll(SB_PAGEUP, 0, NULL);
				Move(0,0);
				m_selEnd   = m_currentAddress;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			OnVScroll(SB_PAGEUP, 0, NULL);
			Move(0,0);
			break;
		case VK_NEXT:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				OnVScroll(SB_PAGEDOWN, 0, NULL);
				Move(0,0);
				m_selEnd   = m_currentAddress;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			OnVScroll(SB_PAGEDOWN, 0, NULL);
			Move(0,0);
			break;
		case VK_HOME:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				if(GetKeyState(VK_CONTROL) & 0x80000000)
				{
					OnVScroll(SB_THUMBTRACK, 0, NULL);
					Move(0,0);
				}
				else
				{
					m_currentAddress /= m_bpr;
					m_currentAddress *= m_bpr;
					Move(0,0);
				}
				m_selEnd   = m_currentAddress;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			if(GetKeyState(VK_CONTROL) & 0x80000000)
			{
				OnVScroll(SB_THUMBTRACK, 0, NULL);
				m_currentAddress = 0;
				Move(0,0);
			}
			else
			{
				m_currentAddress /= m_bpr;
				m_currentAddress *= m_bpr;
				Move(0,0);
			}
			break;
		case VK_END:
			if(bShift)
			{
				if(!IsSelected())
				{
					m_selStart = m_currentAddress;
				}
				if(GetKeyState(VK_CONTROL) & 0x80000000)
				{
					m_currentAddress = m_length-1;
					OnVScroll(SB_THUMBTRACK, ((m_length+(m_bpr/2)) / m_bpr) - m_lpp, NULL);
					Move(0,0);
				}
				else
				{
					m_currentAddress /= m_bpr;
					m_currentAddress *= m_bpr;
					m_currentAddress += m_bpr - 1;
					if(m_currentAddress > m_length)
						m_currentAddress = m_length-1;
					Move(0,0);
				}
				m_selEnd   = m_currentAddress;
				RedrawWindow();
				break;
			}
			else
				SetSel(-1, -1);
			if(GetKeyState(VK_CONTROL) & 0x80000000)
			{
				m_currentAddress = m_length-1;
				if(m_bHalfPage)
					OnVScroll(SB_THUMBTRACK, 0, NULL);
				else
					OnVScroll(SB_THUMBTRACK, ((m_length+(m_bpr/2)) / m_bpr) - m_lpp, NULL);
				Move(0,0);
			}
			else
			{
				m_currentAddress /= m_bpr;
				m_currentAddress *= m_bpr;
				m_currentAddress += m_bpr - 1;
				if(m_currentAddress > m_length)
					m_currentAddress = m_length-1;
				Move(0,0);
			}
			break;
		case VK_INSERT:
			SelInsert(m_currentAddress, max(1, m_selEnd-m_selStart));
			RedrawWindow();
			break;
		case VK_DELETE:
			if(IsSelected())
			{
				OnEditClear();
			}
			else
			{
				SelDelete(m_currentAddress, m_currentAddress+1);
				RedrawWindow();
			}
			break;
		case '\t':
			switch(m_currentMode)
			{
				case EDIT_NONE:
					m_currentMode = EDIT_HIGH;
					break;
				case EDIT_HIGH:
				case EDIT_LOW:
					m_currentMode = EDIT_ASCII;
					break;
				case EDIT_ASCII:
					m_currentMode = EDIT_HIGH;
					break;
			}
			Move(0,0);
			break;

	}
	m_bNoAddressChange = bac;
}

void CCJHexEdit::Move(int x, int y)
{
	switch(m_currentMode)
	{
		case EDIT_NONE:
			return;
		case EDIT_HIGH:
			if(x != 0)
				m_currentMode = EDIT_LOW;
			if(x == -1)
				m_currentAddress --;
			m_currentAddress += y* m_bpr;
			break;
		case EDIT_LOW:
			if(x != 0)
				m_currentMode = EDIT_HIGH;
			if(x == 1)
				m_currentAddress++;
			m_currentAddress += y* m_bpr;
			break;
		case EDIT_ASCII:
			{
				m_currentAddress += x;
				m_currentAddress += y*m_bpr;
			}
			break;
	}
	if(m_currentAddress < 0)
		m_currentAddress = 0;

	if(m_currentAddress >= m_length)
	{
		m_currentAddress -= x;
		m_currentAddress -= y*m_bpr;
	}
	m_bNoAddressChange = TRUE;
	if(m_currentAddress < m_topindex)
	{
		OnVScroll(SB_LINEUP, 0, NULL);
	}
	if(m_currentAddress >= m_topindex + m_lpp*m_bpr)
	{
		OnVScroll(SB_LINEDOWN, 0, NULL);
	}
	m_bNoAddressChange = FALSE;
	//ScrollIntoView(m_currentAddress);
	RepositionCaret(m_currentAddress);
}

void CCJHexEdit::SetSel(int s, int e)
{
	DestroyCaret();
	m_selStart = s;
	m_selEnd = e;
	RedrawWindow();
	if(m_editPos.x == 0 && m_bShowAddress)
		CreateAddressCaret();
	else
		CreateEditCaret();
	SetCaretPos(m_editPos);
	ShowCaret();
}

void CCJHexEdit::RepositionCaret(int	 p)
{
	int x, y;

	y = (p - m_topindex) / m_bpr;
	x = (p - m_topindex) % m_bpr;

	switch(m_currentMode)
	{
		case EDIT_NONE:
			CreateAddressCaret();
			x = 0;
			break;
		case EDIT_HIGH:
			CreateEditCaret();
			x *= m_nullWidth*3;
			x += m_offHex;
			break;
		case EDIT_LOW:
			CreateEditCaret();
			x *= m_nullWidth*3;
			x += m_nullWidth;
			x += m_offHex;
			break;
		case EDIT_ASCII:
			CreateEditCaret();
			x *= m_nullWidth;
			x += m_offAscii;
			break;
	}
	m_editPos.x = x;
	m_editPos.y = y*m_lineHeight;
	CRect rc;
	GetClientRect(&rc);
	if(rc.PtInRect(m_editPos))
	{
		SetCaretPos(m_editPos);
		ShowCaret();
	}
}

void CCJHexEdit::ScrollIntoView(int p)
{
	if(p < m_topindex || p > m_topindex + m_lpp*m_bpr)
	{
		m_topindex = (p/m_bpr) * m_bpr;
		m_topindex -= (m_lpp / 3) * m_bpr;
		if(m_topindex < 0)
			m_topindex = 0;

		UpdateScrollbars();
		RedrawWindow();
	}
}

void CCJHexEdit::OnContextMenu(CWnd*, CPoint point)
{
	if (point.x == -1 && point.y == -1)
	{
		//keystroke invocation
		CRect rect;
		GetClientRect(rect);
		ClientToScreen(rect);

		point = rect.TopLeft();
		point.Offset(5, 5);
	}

	CMenu menu;
	VERIFY(menu.LoadMenu(IDR_POPUP_HEX_EDIT));

	CMenu* pPopup = menu.GetSubMenu(0);
	ASSERT(pPopup != NULL);

	pPopup->EnableMenuItem(ID_EDIT_UNDO, MF_GRAYED|MF_DISABLED|MF_BYCOMMAND);
	if(!IsSelected())
	{
		pPopup->EnableMenuItem(ID_EDIT_CLEAR, MF_GRAYED|MF_DISABLED|MF_BYCOMMAND);
		pPopup->EnableMenuItem(ID_EDIT_CUT, MF_GRAYED|MF_DISABLED|MF_BYCOMMAND);
		pPopup->EnableMenuItem(ID_EDIT_COPY, MF_GRAYED|MF_DISABLED|MF_BYCOMMAND);
	}
	{
		COleDataObject	obj;	
		if (obj.AttachClipboard()) 
		{
			if(
				!obj.IsDataAvailable(CF_TEXT) && !obj.IsDataAvailable((CLIPFORMAT)RegisterClipboardFormat( _T("BinaryData"))))
				pPopup->EnableMenuItem(ID_EDIT_PASTE, MF_GRAYED|MF_DISABLED|MF_BYCOMMAND);
		}
	}

	pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y,
		this);
}

void CCJHexEdit::OnEditClear() 
{
	m_currentAddress = m_selStart;
	SelDelete(m_selStart, m_selEnd);
	RepositionCaret(m_currentAddress);
	RedrawWindow();
}

void CCJHexEdit::OnEditCopy() 
{
	COleDataSource*		pSource = new COleDataSource();
	EmptyClipboard();
	if(m_currentMode != EDIT_ASCII)
	{
		int			dwLen = (m_selEnd-m_selStart);
		HGLOBAL		hMemb = ::GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE|GMEM_ZEROINIT, m_selEnd-m_selStart);
		HGLOBAL		hMema = ::GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE|GMEM_ZEROINIT, (dwLen) * 3);

		if (!hMema) 
			return;

		// copy binary
		LPBYTE	p = (BYTE*)::GlobalLock(hMemb);
		memcpy(p, m_pData+m_selStart, dwLen);
		::GlobalUnlock(hMemb);
		
		// copy ascii
		p = (BYTE*)::GlobalLock(hMema);
		for(int	 i = 0; i < dwLen;)
		{
			TOHEX(m_pData[m_selStart+i], p);
			*p++ = ' ';
			i++;
		}

		::GlobalUnlock(hMema);

		pSource->CacheGlobalData((CLIPFORMAT)RegisterClipboardFormat( _T("BinaryData")), hMemb);	
		pSource->CacheGlobalData(CF_TEXT, hMema);	
	}
	else
	{
		HGLOBAL				hMemb = ::GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE|GMEM_ZEROINIT, m_selEnd-m_selStart);
		HGLOBAL				hMema = ::GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE|GMEM_ZEROINIT, m_selEnd-m_selStart);
		if (!hMemb || !hMema) 
			return;

		// copy binary
		LPBYTE	p = (BYTE*)::GlobalLock(hMemb);
		int		dwLen = m_selEnd-m_selStart;

		memcpy(p, m_pData+m_selStart, dwLen);
		::GlobalUnlock(hMemb);
		
		// copy ascii
		p = (BYTE*)::GlobalLock(hMema);
		memcpy(p, m_pData+m_selStart, dwLen);
		for(int i = 0; i < dwLen; p++, i++)
			if(!isprint(*p))
				*p = '.';
		::GlobalUnlock(hMema);

		pSource->CacheGlobalData((CLIPFORMAT)RegisterClipboardFormat( _T("BinaryData")), hMemb);	
		pSource->CacheGlobalData(CF_TEXT, hMema);	
	}
	pSource->SetClipboard();
}

void CCJHexEdit::OnEditCut() 
{
	OnEditCopy();
	SelDelete(m_selStart, m_selEnd);
	RedrawWindow();
}

void CCJHexEdit::OnEditPaste() 
{
	COleDataObject	obj;	
	if (obj.AttachClipboard()) 
	{
		HGLOBAL hmem = NULL;
		if (obj.IsDataAvailable((CLIPFORMAT)RegisterClipboardFormat( _T("BinaryData")))) 
		{
			hmem = obj.GetGlobalData((CLIPFORMAT)RegisterClipboardFormat( _T("BinaryData")));
		}	
		else if (obj.IsDataAvailable(CF_TEXT)) 
		{
			hmem = obj.GetGlobalData(CF_TEXT);
		}
		if(hmem)
		{
			LPBYTE	p = (BYTE*)::GlobalLock(hmem);
			DWORD	dwLen = ::GlobalSize(hmem);
			int		insert;
			int		oa = m_currentAddress;
			
			NormalizeSel();
			if(m_selStart == 0xffffffff)
			{
				if(m_currentMode == EDIT_LOW)
					m_currentAddress++;
				insert = m_currentAddress;
				SelInsert(m_currentAddress, dwLen);
			}
			else
			{
				insert = m_selStart;
				SelDelete(m_selStart, m_selEnd);
				SelInsert(insert, dwLen);
				SetSel(-1, -1);
			}

			memcpy(m_pData+insert, p, dwLen);

			m_currentAddress = oa;
			RedrawWindow();
			::GlobalUnlock(hmem);
		}
	}
}

void CCJHexEdit::OnEditSelectAll() 
{
	m_selStart = 0;
	m_selEnd = m_length;
	DestroyCaret();
	RedrawWindow();
}

void CCJHexEdit::OnEditUndo() 
{
	// TODO: Add your command handler code here
	
}

void CCJHexEdit::NormalizeSel()
{
	if(m_selStart > m_selEnd)
		m_selStart ^= m_selEnd ^= m_selStart ^= m_selEnd;
}

void CCJHexEdit::SelDelete(int s, int e)
{
	LPBYTE p = (LPBYTE) malloc(m_length - (e-s)+1);
	memcpy(p, m_pData, s);
	if(s < m_length-(e-s)) 
		memcpy(p+s, m_pData+e, (m_length -e));
	
	free(m_pData);
	SetSel(-1, -1);
	m_pData = p;
	m_length = m_length-(e-s);
	if(m_currentAddress > m_length)
	{
		m_currentAddress = m_length;
		RepositionCaret(m_currentAddress);
	}
	m_bUpdate = TRUE;
}

void CCJHexEdit::SelInsert(int s, int l)
{
	LPBYTE p = (LPBYTE) calloc(m_length + l, 1);
	memcpy(p, m_pData, s);
	memcpy(p+s+l, m_pData+s, (m_length-s));
	free(m_pData);
	SetSel(-1, -1);
	m_pData = p;
	m_length = m_length+l;
	m_bUpdate = TRUE;
}

void CCJHexEdit::SetData(LPBYTE p, int len)
{
	free(m_pData);
	
	m_pData = (LPBYTE) malloc(len);
	memcpy(m_pData, p, len);

	SetSel(-1, -1);
	m_length = len;
	m_currentAddress = 0;
	m_editPos.x = m_editPos.y = 0;
	m_currentMode = EDIT_HIGH;
	m_topindex = 0;
	m_bUpdate = TRUE;
}

void CCJHexEdit::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	UNUSED_ALWAYS(nSBCode);
	UNUSED_ALWAYS(nPos);
	UNUSED_ALWAYS(pScrollBar);
}

void CCJHexEdit::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	UNUSED_ALWAYS(nFlags);
	UNUSED_ALWAYS(point);
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Founder Riverblade Limited
United Kingdom United Kingdom
I haven't always written software for a living. When I graduated from Surrey University in 1989, it was with an Electronic Engineering degree, but unfortunately that never really gave me the opportunity to do anything particularly interesting (with the possible exception of designing Darth Vader's Codpiece * for the UK Army in 1990).
    * Also known as the Standard Army Bootswitch. But that's another story...
Since the opportunity arose to lead a software team developing C++ software for Avionic Test Systems in 1996, I've not looked back. More recently I've been involved in the development of subsea acoustic navigation systems, digital TV broadcast systems, port security/tracking systems, and most recently software development tools with my own company, Riverblade Ltd.

One of my personal specialities is IDE plug-in development. ResOrg was my first attempt at a plug-in, but my day to day work is with Visual Lint, an interactive code analysis tool environment with works within the Visual Studio and Eclipse IDEs or on build servers.

I love lots of things, but particularly music, photography and anything connected with history or engineering. I despise ignorant, intolerant and obstructive people - and it shows...I can be a bolshy cow if you wind me up the wrong way...Laugh | :laugh:

I'm currently based 15 minutes walk from the beach in Bournemouth on the south coast of England. Since I moved here I've grown to love the place - even if it is full of grockles in Summer!

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