xlistbox.cpp

存C写的zip压缩、解压缩源代码。主要对文件操作

int CXListBox::InsertString(int nIndex, LPCTSTR lpszItem)
{
	if (!::IsWindow(m_hWnd))
	{
		ASSERT(FALSE);
		return LB_ERR;
	}

	CString s;
	s.Empty();
	s = lpszItem;

	Color tc = Black;			// to force black-only text
	Color bc = White;

	UINT nColor = (UINT) tc;
	ASSERT(nColor < 16);
	if (nColor >= 16)
		tc = Black;

	// don't display \r or \n characters
	int i;
	while ((i = s.FindOneOf(_T("\r\n"))) != -1)
		s.SetAt(i, ' ');

	// first character in string is color -- add 1 to color
	// to avoid asserts by CString class
	CString t;
	t .Empty();
	t += (char) (tc + 1);
	t += (char) (bc + 1);
	t += s;

	// try to insert the string into the listbox
	i = CListBox::InsertString(nIndex, t);

	return i;
}

//////////////////////////////////////////////////////////////////////////////
// AddString - override to add text color
void CXListBox::AddString(LPCTSTR lpszItem)
{
	AddLine(CXListBox::Black, CXListBox::White, lpszItem);
}

//////////////////////////////////////////////////////////////////////////////
// AddLine
void CXListBox::AddLine(Color tc, Color bc, LPCTSTR lpszLine)
{
	if (!::IsWindow(m_hWnd))
	{
		ASSERT(FALSE);
		return;
	}

	CString s;
	s.Empty();
	s = lpszLine;

	if (!m_bColor)
	{
		tc = Black;			// to force black-only text
		bc = White;
	}

	UINT nColor = (UINT) tc;
	ASSERT(nColor < 16);
	if (nColor >= 16)
		tc = Black;

	// don't display \r or \n characters
	int i;
	while ((i = s.FindOneOf(_T("\r\n"))) != -1)
		s.SetAt(i, _T(' '));

	// first character in string is color -- add 1 to color
	// to avoid asserts by CString class
	CString t;
	t .Empty();
	t += (TCHAR) (tc + 1);
	t += (TCHAR) (bc + 1);
	t += s;

	// try to add the string to the listbox
	i = CListBox::AddString(t);
	if (i == LB_ERRSPACE)
	{
		// will get LB_ERRSPACE if listbox is out of memory
		int n = GetCount();

		if (n == LB_ERR)
			return;

		if (n < 2)
			return;

		// try to delete some strings to free up some room --
		// don't spend too much time deleting strings, since
		// we might be getting a burst of messages
		n = (n < 20) ? (n-1) : 20;
		if (n <= 0)
			n = 1;

		SetRedraw(FALSE);
		for (i = 0; i < n; i++)
			DeleteString(0);

		i = CListBox::AddString(t);

		SetRedraw(TRUE);
	}

	if (i >= 0)
	{
		SetTopIndex(i);
	}

	SetCurSel(-1);
}

///////////////////////////////////////////////////////////////////////////////
// Printf
void _cdecl CXListBox::Printf(Color tc, Color bc, UINT nID, LPCTSTR lpszFmt, ...)
{
	TCHAR buf[1024], fmt[1024];
	va_list marker;

	// load format string from string resource if
	// a resource ID was specified
	if (nID)
	{
		CString s;
		if (!s.LoadString(nID))
		{
			_stprintf(s.GetBufferSetLength(80), _T("Failed to load string resource %u"),
				nID);
			s.ReleaseBuffer(-1);
		}
		_tcsncpy(fmt, s, sizeof(fmt)/sizeof(TCHAR)-1);
	}
	else
	{
		// format string was passed as parameter
		_tcsncpy(fmt, lpszFmt, sizeof(fmt)/sizeof(TCHAR)-1);
	}
	fmt[sizeof(fmt)/sizeof(TCHAR)-1] = 0;

	// combine output string and variables
	va_start(marker, lpszFmt);
	_vsntprintf(buf, (sizeof(buf)/sizeof(TCHAR))-1, fmt, marker);
	va_end(marker);
	buf[sizeof(buf)/sizeof(TCHAR)-1] = 0;

	AddLine(tc, bc, buf);
}

//////////////////////////////////////////////////////////////////////////////
// EnableColor
void CXListBox::EnableColor (BOOL bEnable)
{
	m_bColor = bEnable;
}

//////////////////////////////////////////////////////////////////////////////
// SetTabPosition
void CXListBox::SetTabPosition(int nSpacesPerTab)
{
	ASSERT(nSpacesPerTab > 0 && nSpacesPerTab < 11);

	m_nTabPosition = nSpacesPerTab;

	CDC* pDC = GetDC();

	if (pDC)
	{
		TEXTMETRIC tm;
		pDC->GetTextMetrics(&tm);

		pDC->GetCharWidth((UINT) ' ', (UINT) ' ', &m_nSpaceWidth);
		pDC->GetCharWidth((UINT) '9', (UINT) '9', &m_nAveCharWidth);

		for (int i = 0; i < MAXTABSTOPS; i++)
			m_nTabStopPositions[i] = (i+1) * m_nAveCharWidth * m_nTabPosition;

		ReleaseDC(pDC);
	}
}

//////////////////////////////////////////////////////////////////////////////
// GetVisibleLines
int CXListBox::GetVisibleLines()
{
	int nCount = 0;

	CDC* pDC = GetDC();

	if (pDC)
	{
		TEXTMETRIC tm;
		pDC->GetTextMetrics(&tm);
		int h = tm.tmHeight + tm.tmInternalLeading;
		ReleaseDC(pDC);

		CRect rect;
		GetClientRect(&rect);
		nCount = rect.Height() / h;
	}
	return nCount;
}

//////////////////////////////////////////////////////////////////////////////
// ResetContent
void CXListBox::ResetContent()
{
	if (!::IsWindow(m_hWnd))
	{
		ASSERT(FALSE);
		return;
	}

	CListBox::ResetContent();

	m_cxExtent = 0;

	SetHorizontalExtent(m_cxExtent);
}

//////////////////////////////////////////////////////////////////////////////
// SetFont
void CXListBox::SetFont(CFont *pFont, BOOL bRedraw)
{
	if (!::IsWindow(m_hWnd))
	{
		ASSERT(FALSE);
		return;
	}

	CListBox::SetFont(pFont, bRedraw);

	CDC* pDC = GetDC();

	if (pDC)
	{
		CFont *pOldFont = pDC->SelectObject(pFont);

		TEXTMETRIC tm;
		pDC->GetTextMetrics(&tm);
		int h = tm.tmHeight;
		SetItemHeight(0, h);

		pDC->SelectObject(pOldFont);

		pDC->GetCharWidth((UINT) ' ', (UINT) ' ', &m_nSpaceWidth);
		pDC->GetCharWidth((UINT) '9', (UINT) '9', &m_nAveCharWidth);

		for (int i = 0; i < MAXTABSTOPS; i++)
			m_nTabStopPositions[i] = (i+1) * m_nAveCharWidth * m_nTabPosition;

		ReleaseDC(pDC);
	}

	m_cxExtent = 0;
}

//////////////////////////////////////////////////////////////////////////////
// OnLButtonDblClk
void CXListBox::OnLButtonDblClk(UINT nFlags, CPoint point)
{
	CListBox::OnLButtonDblClk(nFlags, point);
}

//////////////////////////////////////////////////////////////////////////////
// OnContextMenu
void CXListBox::OnContextMenu(CWnd* /*pWnd*/, CPoint point)
{
	if (m_nContextMenuId == -1)
	{
		TRACE(_T("no context menu\n"));
		return;
	}

	CMenu menu;
	if (!menu.LoadMenu(m_nContextMenuId))
	{
		TRACE(_T("ERROR failed to load %d\n"), m_nContextMenuId);
		return;
	}

	menu.GetSubMenu(0)->TrackPopupMenu(0,
		point.x, point.y, this, NULL);
}

//////////////////////////////////////////////////////////////////////////////
// OnEditCopy
void CXListBox::OnEditCopy()
{
	CString str;
	str.Empty();

	int nCount = GetCount();
	int nSel = 0;

	for (int i = 0; i < nCount; i++)
	{
		if (GetSel(i) > 0)
		{
			CString s;
			s.Empty();
			GetText(i, s);
			if (!s.IsEmpty())
			{
				nSel++;
				s.TrimLeft(_T("\r\n"));
				s.TrimRight(_T("\r\n"));
				if (s.Find(_T('\n')) == -1)
					s += _T("\n");
				s.Replace(_T("\t"), _T(" "));
				str += s;
			}
		}
	}

	if (!str.IsEmpty())
		CClipboard::SetText(str);
}

//////////////////////////////////////////////////////////////////////////////
// OnEditClear
void CXListBox::OnEditClear()
{
	ResetContent();
}

//////////////////////////////////////////////////////////////////////////////
// OnEditSelectAll
void CXListBox::OnEditSelectAll()
{
	if (!::IsWindow(m_hWnd))
	{
		ASSERT(FALSE);
		return;
	}

	SelItemRange(TRUE, 0, GetCount()-1);
}