gridctrl.cpp

這是一個可以計算學期成績的視窗程式 是利用讀入純文字檔案 來計算學期成績和平均

BOOL CGridCtrl::Create(const RECT& rect, CWnd* pParentWnd, UINT nID, DWORD dwStyle)
{
    ASSERT(pParentWnd->GetSafeHwnd());

    if (!CWnd::Create(GRIDCTRL_CLASSNAME, NULL, dwStyle, rect, pParentWnd, nID))
        return FALSE;

    //Initialise(); - called in PreSubclassWnd

    // The number of rows and columns will only be non-zero if the constructor
    // was called with non-zero initialising parameters. If this window was created
    // using a dialog template then the number of rows and columns will be 0 (which
    // means that the code below will not be needed - which is lucky 'cause it ain't
    // gonna get called in a dialog-template-type-situation.

    TRY
    {
        m_arRowHeights.SetSize(m_nRows);    // initialize row heights
        m_arColWidths.SetSize(m_nCols);     // initialize column widths
    }
    CATCH (CMemoryException, e)
    {
        e->ReportError();
        return FALSE;
    }
    END_CATCH

    int i;
    for (i = 0; i < m_nRows; i++)
        m_arRowHeights[i] = m_cellDefault.GetHeight();
    for (i = 0; i < m_nCols; i++)
        m_arColWidths[i] = m_cellDefault.GetWidth();

    return TRUE;
}




void CGridCtrl::SetupDefaultCells()
{
    m_cellDefault.SetGrid(this);            // Normal editable cell
    m_cellFixedColDef.SetGrid(this);        // Cell for fixed columns
    m_cellFixedRowDef.SetGrid(this);        // Cell for fixed rows
    m_cellFixedRowColDef.SetGrid(this);     // Cell for area overlapped by fixed columns/rows

    m_cellDefault.SetTextClr(m_crWindowText);   
    m_cellDefault.SetBackClr(m_crWindowColour); 
    m_cellFixedColDef.SetTextClr(m_crWindowText);
    m_cellFixedColDef.SetBackClr(m_cr3DFace);
    m_cellFixedRowDef.SetTextClr(m_crWindowText);
    m_cellFixedRowDef.SetBackClr(m_cr3DFace);
    m_cellFixedRowColDef.SetTextClr(m_crWindowText);
    m_cellFixedRowColDef.SetBackClr(m_cr3DFace);
}

void CGridCtrl::PreSubclassWindow()
{
    CWnd::PreSubclassWindow();

    //HFONT hFont = ::CreateFontIndirect(m_cellDefault.GetFont());
    //OnSetFont((LPARAM)hFont, 0);
    //DeleteObject(hFont);

    Initialise();
}

// Sends a message to the parent in the form of a WM_NOTIFY message with
// a NM_GRIDVIEW structure attached
LRESULT CGridCtrl::SendMessageToParent(int nRow, int nCol, int nMessage) const
{
    if (!IsWindow(m_hWnd))
        return 0;

    NM_GRIDVIEW nmgv;
    nmgv.iRow         = nRow;
    nmgv.iColumn      = nCol;
    nmgv.hdr.hwndFrom = m_hWnd;
    nmgv.hdr.idFrom   = GetDlgCtrlID();
    nmgv.hdr.code     = nMessage;

    CWnd *pOwner = GetOwner();
    if (pOwner && IsWindow(pOwner->m_hWnd))
        return pOwner->SendMessage(WM_NOTIFY, nmgv.hdr.idFrom, (LPARAM)&nmgv);
    else
        return 0;
}

// Send a request to the parent to return information on a given cell
LRESULT CGridCtrl::SendDisplayRequestToParent(GV_DISPINFO* pDisplayInfo) const
{
    if (!IsWindow(m_hWnd))
        return 0;

    // Fix up the message headers
    pDisplayInfo->hdr.hwndFrom = m_hWnd;
    pDisplayInfo->hdr.idFrom   = GetDlgCtrlID();
    pDisplayInfo->hdr.code     = GVN_GETDISPINFO;

    // Send the message
    CWnd *pOwner = GetOwner();
    if (pOwner && IsWindow(pOwner->m_hWnd))
        return pOwner->SendMessage(WM_NOTIFY, pDisplayInfo->hdr.idFrom, (LPARAM)pDisplayInfo);
    else
        return 0;
}

// Send a hint to the parent about caching information
LRESULT CGridCtrl::SendCacheHintToParent(const CCellRange& range) const
{
    if (!IsWindow(m_hWnd))
        return 0;

    GV_CACHEHINT CacheHint;

    // Fix up the message headers
    CacheHint.hdr.hwndFrom = m_hWnd;
    CacheHint.hdr.idFrom   = GetDlgCtrlID();
    CacheHint.hdr.code     = GVN_ODCACHEHINT;

    CacheHint.range = range;

    // Send the message
    CWnd *pOwner = GetOwner();
    if (pOwner && IsWindow(pOwner->m_hWnd))
        return pOwner->SendMessage(WM_NOTIFY, CacheHint.hdr.idFrom, (LPARAM)&CacheHint);
    else
        return 0;
}

#define LAYER_SIGNATURE (0x5FD4E64)
int CGridCtrl::GetLayer(int** pLayer) // used to save and restore order of columns
{ //  gives back the size of the area (do not forget to delete pLayer)
	int Length = 2+GetColumnCount()*2;
	int *Layer = new int[Length];	// the caller is supposed to delete it
	Layer[0]= LAYER_SIGNATURE;
	Layer[1]= GetColumnCount();
	memcpy(&Layer[2], &m_arColOrder[0], GetColumnCount()*sizeof(int));
	memcpy(&Layer[2+GetColumnCount()], &m_arColWidths[0], GetColumnCount()*sizeof(int));
	*pLayer = Layer;
	return Length;
}
void CGridCtrl::SetLayer(int* pLayer)
{ // coming from a previous GetLayer (ignored if not same number of column, or the same revision number)
	if(pLayer[0] != LAYER_SIGNATURE) return;
	if(pLayer[1] != GetColumnCount()) return;
/*	TRACE("  %d == %d \n",m_arColOrder[0],pLayer[2]);
	TRACE("  %d == %d \n",m_arColOrder[1],pLayer[3]);
	TRACE("  %d == %d \n",m_arColOrder[2],pLayer[4]);
	TRACE("  %d == %d \n",m_arColWidths[0],pLayer[2+3]);
	TRACE("  %d == %d \n",m_arColWidths[1],pLayer[3+3]);
	TRACE("  %d == %d \n",m_arColWidths[2],pLayer[4+3]);
	TRACE("  %d == %d \n",GetColumnCount(),3);

	
	ASSERT(m_arColOrder[0]==pLayer[2]);
	ASSERT(m_arColOrder[1]==pLayer[3]);
	ASSERT(m_arColOrder[2]==pLayer[4]);
	ASSERT(m_arColWidths[0]==pLayer[2+3]);
	ASSERT(m_arColWidths[1]==pLayer[3+3]);
	ASSERT(m_arColWidths[2]==pLayer[4+3]);
	ASSERT(GetColumnCount()==3);
*/	memcpy(&m_arColOrder[0],&pLayer[2], GetColumnCount()*sizeof(int));
	memcpy(&m_arColWidths[0],&pLayer[2+GetColumnCount()], GetColumnCount()*sizeof(int));
}

BEGIN_MESSAGE_MAP(CGridCtrl, CWnd)
//EFW - Added ON_WM_RBUTTONUP
//{{AFX_MSG_MAP(CGridCtrl)
    ON_WM_PAINT()
    ON_WM_HSCROLL()
    ON_WM_VSCROLL()
    ON_WM_SIZE()
    ON_WM_LBUTTONUP()
    ON_WM_LBUTTONDOWN()
    ON_WM_MOUSEMOVE()
    ON_WM_TIMER()
    ON_WM_GETDLGCODE()
    ON_WM_KEYDOWN()
    ON_WM_CHAR()
    ON_WM_LBUTTONDBLCLK()
    ON_WM_ERASEBKGND()
    ON_UPDATE_COMMAND_UI(ID_EDIT_SELECT_ALL, OnUpdateEditSelectAll)
    ON_COMMAND(ID_EDIT_SELECT_ALL, OnEditSelectAll)
    ON_WM_SYSKEYDOWN()
//}}AFX_MSG_MAP
#ifndef _WIN32_WCE_NO_CURSOR
    ON_WM_SETCURSOR()
#endif
#ifndef _WIN32_WCE
    ON_WM_RBUTTONUP()
    ON_WM_SYSCOLORCHANGE()
    ON_WM_CAPTURECHANGED()
#endif
#ifndef GRIDCONTROL_NO_CLIPBOARD
    ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
    ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateEditCopy)
    ON_COMMAND(ID_EDIT_CUT, OnEditCut)
    ON_UPDATE_COMMAND_UI(ID_EDIT_CUT, OnUpdateEditCut)
    ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
    ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste)
#endif
#if (_WIN32_WCE >= 210)
    ON_WM_SETTINGCHANGE()
#endif
#if !defined(_WIN32_WCE) && (_MFC_VER >= 0x0421)
    ON_WM_MOUSEWHEEL()
#endif
    ON_MESSAGE(WM_SETFONT, OnSetFont)
    ON_MESSAGE(WM_GETFONT, OnGetFont)
    ON_MESSAGE(WM_IME_CHAR, OnImeChar)
    ON_NOTIFY(GVN_ENDLABELEDIT, IDC_INPLACE_CONTROL, OnEndInPlaceEdit)
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CGridCtrl message handlers

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

    if (m_bDoubleBuffer)    // Use a memory DC to remove flicker
    {
        CMemDC MemDC(&dc);
        OnDraw(&MemDC);
    }
    else                    // Draw raw - this helps in debugging vis problems.
        OnDraw(&dc);
}

BOOL CGridCtrl::OnEraseBkgnd(CDC* /*pDC*/)
{
    return TRUE;    // Don't erase the background.
}

// Custom background erasure. This gets called from within the OnDraw function,
// since we will (most likely) be using a memory DC to stop flicker. If we just
// erase the background normally through OnEraseBkgnd, and didn't fill the memDC's
// selected bitmap with colour, then all sorts of vis problems would occur
void CGridCtrl::EraseBkgnd(CDC* pDC)
{
    CRect  VisRect, ClipRect, rect;
    CBrush FixedRowColBack(GetDefaultCell(TRUE, TRUE)->GetBackClr()),
           FixedRowBack(GetDefaultCell(TRUE, FALSE)->GetBackClr()),
           FixedColBack(GetDefaultCell(FALSE, TRUE)->GetBackClr()),
           TextBack(GetDefaultCell(FALSE, FALSE)->GetBackClr());
    CBrush Back(GetGridBkColor()); 
    //CBrush Back(GetTextBkColor());

    if (pDC->GetClipBox(ClipRect) == ERROR)
        return;
    GetVisibleNonFixedCellRange(VisRect);

    int nFixedColumnWidth = GetFixedColumnWidth();
    int nFixedRowHeight = GetFixedRowHeight();

    // Draw Fixed row/column background
    if (ClipRect.left < nFixedColumnWidth && ClipRect.top < nFixedRowHeight)
        pDC->FillRect(CRect(ClipRect.left, ClipRect.top, 
                      nFixedColumnWidth, nFixedRowHeight),
                      &FixedRowColBack);

    // Draw Fixed columns background
    if (ClipRect.left < nFixedColumnWidth && ClipRect.top < VisRect.bottom)
        pDC->FillRect(CRect(ClipRect.left, ClipRect.top, 
                      nFixedColumnWidth, VisRect.bottom),
                      &FixedColBack);
        
    // Draw Fixed rows background
    if (ClipRect.top < nFixedRowHeight && 
        ClipRect.right > nFixedColumnWidth && ClipRect.left < VisRect.right)
        pDC->FillRect(CRect(nFixedColumnWidth-1, ClipRect.top,
                      VisRect.right, nFixedRowHeight),
                      &FixedRowBack);

    // Draw non-fixed cell background
    if (rect.IntersectRect(VisRect, ClipRect)) 
    {
        CRect CellRect(__max(nFixedColumnWidth, rect.left), 
                       __max(nFixedRowHeight, rect.top),
                       rect.right, rect.bottom);
        pDC->FillRect(CellRect, &TextBack);
    }

    // Draw right hand side of window outside grid
    if (VisRect.right < ClipRect.right) 
        pDC->FillRect(CRect(VisRect.right, ClipRect.top, 
                      ClipRect.right, ClipRect.bottom),
                      &Back);

    // Draw bottom of window below grid
    if (VisRect.bottom < ClipRect.bottom && ClipRect.left < VisRect.right) 
        pDC->FillRect(CRect(ClipRect.left, VisRect.bottom,
                      VisRect.right, ClipRect.bottom),
                      &Back);
}

void CGridCtrl::OnSize(UINT nType, int cx, int cy)
{  
    static BOOL bAlreadyInsideThisProcedure = FALSE;
    if (bAlreadyInsideThisProcedure)
        return;

    if (!::IsWindow(m_hWnd))
        return;

	// This is not the ideal place to register the droptarget
#ifndef GRIDCONTROL_NO_DRAGDROP
	m_DropTarget.Register(this);
#endif

    // Start re-entry blocking
    bAlreadyInsideThisProcedure = TRUE;

    EndEditing();        // destroy any InPlaceEdit's
    CWnd::OnSize(nType, cx, cy);
    ResetScrollBars();

    // End re-entry blocking
    bAlreadyInsideThisProcedure = FALSE;
}

UINT CGridCtrl::OnGetDlgCode()
{
    UINT nCode = DLGC_WANTARROWS | DLGC_WANTCHARS; // DLGC_WANTALLKEYS; //

    if (m_bHandleTabKey && !IsCTRLpressed())
        nCode |= DLGC_WANTTAB;

    return nCode;
}

#ifndef _WIN32_WCE
// If system colours change, then redo colours
void CGridCtrl::OnSysColorChange()
{
    CWnd::OnSysColorChange();

    if (GetDefaultCell(FALSE, FALSE)->GetTextClr() == m_crWindowText)                   // Still using system colours
        GetDefaultCell(FALSE, FALSE)->SetTextClr(::GetSysColor(COLOR_WINDOWTEXT));      // set to new system colour
    if (GetDefaultCell(FALSE, FALSE)->GetBackClr() == m_crWindowColour)
        GetDefaultCell(FALSE, FALSE)->SetBackClr(::GetSysColor(COLOR_WINDOW));

    if (GetDefaultCell(TRUE, FALSE)->GetTextClr() == m_crWindowText)                   // Still using system colours
        GetDefaultCell(TRUE, FALSE)->SetTextClr(::GetSysColor(COLOR_WINDOWTEXT));      // set to new system colour
    if (GetDefaultCell(TRUE, FALSE)->GetBackClr() == m_crWindowColour)
        GetDefaultCell(TRUE, FALSE)->SetBackClr(::GetSysColor(COLOR_WINDOW));

    if (GetDefaultCell(FALSE, TRUE)->GetTextClr() == m_crWindowText)                   // Still using system colours
        GetDefaultCell(FALSE, TRUE)->SetTextClr(::GetSysColor(COLOR_WINDOWTEXT));      // set to new system colour
    if (GetDefaultCell(FALSE, TRUE)->GetBackClr() == m_crWindowColour)
        GetDefaultCell(FALSE, TRUE)->SetBackClr(::GetSysColor(COLOR_WINDOW));

    if (GetDefaultCell(TRUE, TRUE)->GetTextClr() == m_crWindowText)                   // Still using system colours
        GetDefaultCell(TRUE, TRUE)->SetTextClr(::GetSysColor(COLOR_WINDOWTEXT));      // set to new system colour
    if (GetDefaultCell(TRUE, TRUE)->GetBackClr() == m_crWindowColour)
        GetDefaultCell(TRUE, TRUE)->SetBackClr(::GetSysColor(COLOR_WINDOW));

    if (GetGridBkColor() == m_crShadow)
        SetGridBkColor(::GetSysColor(COLOR_3DSHADOW));

    m_crWindowText   = ::GetSysColor(COLOR_WINDOWTEXT);
    m_crWindowColour = ::GetSysColor(COLOR_WINDOW);
    m_cr3DFace       = ::GetSysColor(COLOR_3DFACE);
    m_crShadow       = ::GetSysColor(COLOR_3DSHADOW);
}
#endif

#ifndef _WIN32_WCE_NO_CURSOR
// If we are drag-selecting cells, or drag and dropping, stop now
void CGridCtrl::OnCaptureChanged(CWnd *pWnd)
{
    if (pWnd->GetSafeHwnd() == GetSafeHwnd())
        return;

    // kill timer if active
    if (m_nTimerID != 0)
    {
        KillTimer(m_nTimerID);
        m_nTimerID = 0;
    }

#ifndef GRIDCONTROL_NO_DRAGDROP
    // Kill drag and drop if active
    if (m_MouseMode == MOUSE_DRAGGING)
        m_MouseMode = MOUSE_NOTHING;
#endif
}
#endif

#if (_MFC_VER >= 0x0421) || (_WIN32_WCE >= 210)
// If system settings change, then redo colours
void CGridCtrl::OnSettingChange(UINT uFlags, LPCTSTR lpszSection)
{