myeditview.cpp

小编辑器（存在问题

	VERIFY(SetScrollInfo(SB_VERT, &si, TRUE));
	Invalidate(FALSE);
}

void CMyEditView::SetHorzScrollBar()
{
	if((420 - m_LeftChar + 2) < m_PageCols) m_LeftChar = 0;   //80
	
	SCROLLINFO si;
	ZeroMemory(&si,sizeof(si));
	si.cbSize = sizeof(si);
	si.fMask = SIF_DISABLENOSCROLL | SIF_PAGE | SIF_POS | SIF_RANGE;
	si.nMin = 0;
	si.nMax = 420;                                            //80
	si.nPage = m_PageCols;
	si.nPos = m_LeftChar;
	VERIFY(SetScrollInfo(SB_HORZ, &si, TRUE));
	Invalidate(FALSE);
}

//处理鼠标按键及拖动
void CMyEditView::OnLButtonDown(UINT nFlags, CPoint point) 
{	
	CView::OnLButtonDown(nFlags, point);
	m_StartDrag=TRUE;
	m_bFirst=TRUE;

	m_SelStart=m_SelEnd=Point2Pos(point);
	Invalidate(FALSE);
}

void CMyEditView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	CView::OnLButtonUp(nFlags, point);
	if(m_StartDrag)
	{
		m_SelEnd=Point2Pos(point);
		Invalidate(FALSE);
		m_StartDrag=FALSE;
	}
}

void CMyEditView::OnMouseMove(UINT nFlags, CPoint point) 
{
	CView::OnMouseMove(nFlags, point);
	if(m_StartDrag)
	{
		m_SelEnd=Point2Pos(point);
		Invalidate(FALSE);
	}
}

//根据鼠标位置计算对应的字符在缓冲区的位置
UINT CMyEditView::Point2Pos(CPoint point)
{
	if(m_text == NULL)
		return 0;
	UINT line = m_TopLine + point.y / m_LineHeight - 1;
	UINT charset;
	
	if(point.x < m_HexStart)
		charset = 0;
	else if(point.x < m_HexStart + m_CharWidth * 300)            //100*3->16*3
		charset = (point.x - m_HexStart)/(m_CharWidth*3);
	else if(point.x < m_TextStart + 100 * m_CharWidth)           //100->16
		charset = (point.x - m_TextStart)/m_CharWidth;
	else
		charset = 99;                                            //99->15
	return ((line * 100 + charset)>m_CharCount?m_CharCount-1:(line * 100 + charset));//16
}

//处理鼠标滚轮
BOOL CMyEditView::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
	if(zDelta>0)
		m_TopLine= --m_TopLine<1?1:m_TopLine;
	else
		if((m_TopLine + m_PageRows -2) < m_Rows)
			m_TopLine+=1;
	SetVertScrollBar();
	SetHorzScrollBar();
	return CView::OnMouseWheel(nFlags, zDelta, pt);
}

//下面是对滚动条的处理
void CMyEditView::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	CView::OnHScroll(nSBCode, nPos, pScrollBar);

	SCROLLINFO si;
	si.cbSize = sizeof(si);
	si.fMask = SIF_ALL;
	VERIFY(GetScrollInfo(SB_HORZ, &si));

	switch (nSBCode)
	{
	case SB_LEFT:
		m_LeftChar = 0;
		break;
	case SB_BOTTOM:
		m_LeftChar = 420 - m_PageCols + 1;            //80
		break;
	case SB_LINEUP:
		m_LeftChar = m_LeftChar - 1;
		break;
	case SB_LINEDOWN:
		m_LeftChar = m_LeftChar + 1;
		break;
	case SB_PAGEUP:
		m_LeftChar = m_LeftChar - si.nPage + 1;
		break;
	case SB_PAGEDOWN:
		m_LeftChar = m_LeftChar + si.nPage - 1;
		break;
	case SB_THUMBPOSITION:
	case SB_THUMBTRACK:
		m_LeftChar = si.nTrackPos;
		break;
	default:
		return;
	}

	if((m_LeftChar + m_PageCols - 2) > 420) m_LeftChar = 420 - m_PageCols +2;   //420->80
	if(m_LeftChar < 0) m_LeftChar = 0;

	SetHorzScrollBar();
}

void CMyEditView::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	CView::OnVScroll(nSBCode, nPos, pScrollBar);

	SCROLLINFO si;
	si.cbSize = sizeof(si);
	si.fMask = SIF_ALL;
	VERIFY(GetScrollInfo(SB_VERT, &si));

	switch (nSBCode)
	{
	case SB_TOP:
		m_TopLine = 0;
		break;
	case SB_BOTTOM:
		m_TopLine = m_Rows  - m_PageRows + 1;
		break;
	case SB_LINEUP:
		m_TopLine = m_TopLine - 1;
		break;
	case SB_LINEDOWN:
		m_TopLine = m_TopLine + 1;
		break;
	case SB_PAGEUP:
		m_TopLine = m_TopLine - si.nPage + 1;
		break;
	case SB_PAGEDOWN:
		m_TopLine = m_TopLine + si.nPage - 1;
		break;
	case SB_THUMBPOSITION:
	case SB_THUMBTRACK:
		m_TopLine = si.nTrackPos+1;
		break;
	default:
		return;
	}

	if((m_TopLine + m_PageRows -2) > m_Rows) m_TopLine = m_Rows - m_PageRows + 2;
	if(m_TopLine < 1) m_TopLine = 1;

	SetVertScrollBar();
}

//0-9 a-f A-F键的处理
void CMyEditView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	CView::OnChar(nChar, nRepCnt, nFlags);
	UINT input;
	UCHAR cHex = m_text[m_SelEnd];
	
	if(nChar > 47 && nChar < 58)
	{
		input = nChar - 48;
	}
	else if (nChar > 64 && nChar < 71)
	{
		input = nChar - 64 + 9;
	}
	else if (nChar > 96 && nChar < 103)
	{
		input = nChar - 96 + 9;
	}
	else
	{
		return;
	}

	//用输入的字符替换对应位置的数据
	if(m_bFirst)
	{
		input = input << 4;
		cHex = cHex & 0x0f;
		cHex = cHex | input;
		m_bFirst = FALSE;
		m_text[m_SelEnd] = cHex;
	}
	else
	{
		cHex = cHex & 0xf0;
		cHex = cHex | input;
		m_bFirst = TRUE;
		m_text[m_SelEnd] = cHex;
		m_SelEnd ++;
	}
	if(m_SelEnd == m_CharCount)
	{
		m_CharCount = m_SelEnd + 1;
		m_Rows = m_CharCount/100;         //16
	}
	m_SelStart = m_SelEnd;
	ChangeTop();
	ChangeLeft();
	Invalidate(FALSE);
}

BOOL CMyEditView::PreTranslateMessage(MSG* pMsg) 
{
	if(pMsg->message == WM_KEYDOWN)
	{
		switch (LOWORD(pMsg->wParam))
		{
		case VK_LEFT:
			OnCharLeft();
			break;
		case VK_RIGHT:
			OnCharRight();
			break;
		case VK_UP:
			OnLineUp();
			break;
		case VK_DOWN:
			OnLineDown();
			break;
		default:
			break;
		}
	}
	return CView::PreTranslateMessage(pMsg);
}

//下面四个是对上下左右键的处理
void CMyEditView::OnCharLeft()
{
	if(m_bFirst && m_SelEnd > 0)
	{
		m_SelEnd --;
		m_bFirst = FALSE;
	}
	else
	{
		m_bFirst = TRUE;
	}
	ChangeTop();
	ChangeLeft();
	m_SelStart = m_SelEnd;
	Invalidate(FALSE);
}

void CMyEditView::OnCharRight()
{
	if(m_bFirst)
	{
		m_bFirst = FALSE;
	}
	else if( m_SelEnd < m_CharCount-1)
	{
		m_bFirst = TRUE;
		m_SelEnd++;
	}
	ChangeTop();
	ChangeLeft();
	m_SelStart = m_SelEnd;
	Invalidate(FALSE);
}

void CMyEditView::OnLineUp()
{
	if(m_SelEnd > 99)                      //15
		m_SelEnd = m_SelEnd - 100;         //16

	ChangeTop();
	ChangeLeft();
	m_SelStart = m_SelEnd;
	Invalidate(FALSE);
}

void CMyEditView::OnLineDown()
{
	if(m_SelEnd + 100 < m_CharCount)       //16
		m_SelEnd = m_SelEnd + 100;         //16
	else
		m_SelEnd = m_CharCount-1;
	ChangeTop();
	ChangeLeft();
	m_SelStart = m_SelEnd;
	Invalidate(FALSE);
}
//计算显示的最上边字符位置
void CMyEditView::ChangeTop()
{
	int newtop = m_TopLine;

	if((m_SelEnd/100 + 1) < m_TopLine)       //16
	{
		newtop = m_SelEnd/100 + 1;           //16
	}

	if((m_SelEnd/100 + 2) > m_TopLine+m_PageRows)//16
	{
		newtop = m_SelEnd/100 + 2 - m_PageRows;  //16
	}

	if(newtop != m_TopLine)
	{
		m_TopLine = newtop;
		SetVertScrollBar();
	}
}
//计算显示的最左边字符位置
void CMyEditView::ChangeLeft()
{
	int currentcol = m_SelEnd%100;               //16
	if(currentcol*3 + 14 < m_LeftChar)           //14为地址占的位置长度
	{
		m_LeftChar = currentcol*3 + 14;          //14
		SetHorzScrollBar();
	}
	if(currentcol*3 + 14 - m_LeftChar+1 > m_PageCols)//14
	{
		m_LeftChar = currentcol*3 + 14 - m_PageCols +2;//14
		SetHorzScrollBar();
	}
}

void CMyEditView::OnSetFocus(CWnd* pOldWnd) 
{
	CView::OnSetFocus(pOldWnd);
	
	m_bFocused=TRUE;
}

void CMyEditView::OnKillFocus(CWnd* pNewWnd) 
{
	CView::OnKillFocus(pNewWnd);
	
	m_bFocused=FALSE;
}