gridcellbase.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

                pDC->SelectObject(pOldPen);
            }
            
            if (!bVertical)
                rect.right -= size.cy;
        }
    }

    // We want to see '&' characters so use DT_NOPREFIX
    GetTextRect(rect);
    rect.right++;    
    rect.bottom++;

    DrawText(pDC->m_hDC, GetText(), -1, rect, GetFormat() | DT_NOPREFIX);

    pDC->RestoreDC(nSavedDC);

    return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CGridCellBase Mouse and Cursor events

// Not yet implemented
void CGridCellBase::OnMouseEnter()
{
    TRACE0("Mouse entered cell\n");
}

void CGridCellBase::OnMouseOver()
{
    //TRACE0("Mouse over cell\n");
}

// Not Yet Implemented
void CGridCellBase::OnMouseLeave()
{
    TRACE0("Mouse left cell\n");
}

void CGridCellBase::OnClick( CPoint PointCellRelative)
{
    UNUSED_ALWAYS(PointCellRelative);
    TRACE2("Mouse Left btn up in cell at x=%i y=%i\n", PointCellRelative.x, PointCellRelative.y);
}

void CGridCellBase::OnClickDown( CPoint PointCellRelative)
{
    UNUSED_ALWAYS(PointCellRelative);
    TRACE2("Mouse Left btn down in cell at x=%i y=%i\n", PointCellRelative.x, PointCellRelative.y);
}

void CGridCellBase::OnRClick( CPoint PointCellRelative)
{
    UNUSED_ALWAYS(PointCellRelative);
    TRACE2("Mouse right-clicked in cell at x=%i y=%i\n", PointCellRelative.x, PointCellRelative.y);
}

void CGridCellBase::OnDblClick( CPoint PointCellRelative)
{
    UNUSED_ALWAYS(PointCellRelative);
    TRACE2("Mouse double-clicked in cell at x=%i y=%i\n", PointCellRelative.x, PointCellRelative.y);
}

// Return TRUE if you set the cursor
BOOL CGridCellBase::OnSetCursor()
{
#ifndef _WIN32_WCE_NO_CURSOR
    SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW));
#endif
    return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CGridCellBase editing

void CGridCellBase::OnEndEdit() 
{
	ASSERT( FALSE); 
}

BOOL CGridCellBase::ValidateEdit(LPCTSTR str)
{
    UNUSED_ALWAYS(str);
	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CGridCellBase Sizing

BOOL CGridCellBase::GetTextRect( LPRECT pRect)  // i/o:  i=dims of cell rect; o=dims of text rect
{
    if (GetImage() >= 0)
    {
        IMAGEINFO Info;

        CGridCtrl* pGrid = GetGrid();
        CImageList* pImageList = pGrid->GetImageList();
        
        if (pImageList && pImageList->GetImageInfo( GetImage(), &Info))
        {
            int nImageWidth = Info.rcImage.right-Info.rcImage.left+1;
            pRect->left += nImageWidth + GetMargin();
        }
    }

    return TRUE;
}

// By default this uses the selected font (which is a bigger font)
CSize CGridCellBase::GetTextExtent(LPCTSTR szText, CDC* pDC /*= NULL*/)
{
    CGridCtrl* pGrid = GetGrid();
    ASSERT(pGrid);

    BOOL bReleaseDC = FALSE;
    if (pDC == NULL || szText == NULL)
    {
        if (szText)
			pDC = pGrid->GetDC();
        if (pDC == NULL || szText == NULL) 
        {
            CGridDefaultCell* pDefCell = (CGridDefaultCell*) GetDefaultCell();
            ASSERT(pDefCell);
            return CSize(pDefCell->GetWidth(), pDefCell->GetHeight());
        }
        bReleaseDC = TRUE;
    }

    CFont *pOldFont = NULL,
          *pFont = GetFontObject();
    if (pFont)
        pOldFont = pDC->SelectObject(pFont);

    CSize size;
    int nFormat = GetFormat();

    // If the cell is a multiline cell, then use the width of the cell
    // to get the height
    if ((nFormat & DT_WORDBREAK) && !(nFormat & DT_SINGLELINE))
    {
        CString str = szText;
        int nMaxWidth = 0;
        while (TRUE)
        {
            int nPos = str.Find(_T('\n'));
            CString TempStr = (nPos < 0)? str : str.Left(nPos);
            int nTempWidth = pDC->GetTextExtent(TempStr).cx;
            if (nTempWidth > nMaxWidth)
                nMaxWidth = nTempWidth;

            if (nPos < 0)
                break;
            str = str.Mid(nPos + 1);    // Bug fix by Thomas Steinborn
        }
        
        CRect rect;
        rect.SetRect(0,0, nMaxWidth+1, 0);
        pDC->DrawText(szText, -1, rect, nFormat | DT_CALCRECT);
        size = rect.Size();
    }
    else
        size = pDC->GetTextExtent(szText, (int)_tcslen(szText));

    // Removed by Yogurt
    //TEXTMETRIC tm;
    //pDC->GetTextMetrics(&tm);
    //size.cx += (tm.tmOverhang);

    if (pOldFont)
        pDC->SelectObject(pOldFont);
    
    size += CSize(2*GetMargin(), 2*GetMargin());

    // Kludge for vertical text
    LOGFONT *pLF = GetFont();
    if (pLF->lfEscapement == 900 || pLF->lfEscapement == -900)
    {
        int nTemp = size.cx;
        size.cx = size.cy;
        size.cy = nTemp;
        size += CSize(0, 4*GetMargin());
    }
    
    if (bReleaseDC)
        pGrid->ReleaseDC(pDC);

    return size;
}


CSize CGridCellBase::GetCellExtent(CDC* pDC)
{    
    CSize size = GetTextExtent(GetText(), pDC);    
    CSize ImageSize(0,0);    
    
    int nImage = GetImage();    
    if (nImage >= 0)    
    {        
        CGridCtrl* pGrid = GetGrid();        
        ASSERT(pGrid);        
        IMAGEINFO Info;        
        if (pGrid->GetImageList() && pGrid->GetImageList()->GetImageInfo(nImage, &Info))         
        {            
            ImageSize = CSize(Info.rcImage.right-Info.rcImage.left,                                 
                Info.rcImage.bottom-Info.rcImage.top);            
            if (size.cx > 2*(int)GetMargin ())                
                ImageSize.cx += GetMargin();            
            ImageSize.cy += 2*(int)GetMargin ();        
        }    
    }    
    size.cx += ImageSize.cx + 1;    
    size.cy = max(size.cy, ImageSize.cy) + 1;    
    if (IsFixed())    
    {        
        size.cx++;        
        size.cy++;    
    }    
    return size;
}

// EFW - Added to print cells so that grids that use different colors are
// printed correctly.
BOOL CGridCellBase::PrintCell(CDC* pDC, int /*nRow*/, int /*nCol*/, CRect rect)
{
#if defined(_WIN32_WCE_NO_PRINTING) || defined(GRIDCONTROL_NO_PRINTING)
    return FALSE;
#else
    COLORREF crFG, crBG;
    GV_ITEM Item;

    CGridCtrl* pGrid = GetGrid();
    if (!pGrid || !pDC)
        return FALSE;

    if( rect.Width() <= 0
        || rect.Height() <= 0)  // prevents imagelist item from drawing even
        return FALSE;           //  though cell is hidden

    int nSavedDC = pDC->SaveDC();

    pDC->SetBkMode(TRANSPARENT);

    if (pGrid->GetShadedPrintOut())
    {
        // Get the default cell implementation for this kind of cell. We use it if this cell
        // has anything marked as "default"
        CGridDefaultCell *pDefaultCell = (CGridDefaultCell*) GetDefaultCell();
        if (!pDefaultCell)
            return FALSE;

        // Use custom color if it doesn't match the default color and the
        // default grid background color.  If not, leave it alone.
        if(IsFixed())
            crBG = (GetBackClr() != CLR_DEFAULT) ? GetBackClr() : pDefaultCell->GetBackClr();
        else
            crBG = (GetBackClr() != CLR_DEFAULT && GetBackClr() != pDefaultCell->GetBackClr()) ?
                GetBackClr() : CLR_DEFAULT;

        // Use custom color if the background is different or if it doesn't
        // match the default color and the default grid text color.  
        if(IsFixed())
            crFG = (GetBackClr() != CLR_DEFAULT) ? GetTextClr() : pDefaultCell->GetTextClr();
        else
            crFG = (GetBackClr() != CLR_DEFAULT) ? GetTextClr() : pDefaultCell->GetTextClr();

        // If not printing on a color printer, adjust the foreground color
        // to a gray scale if the background color isn't used so that all
        // colors will be visible.  If not, some colors turn to solid black
        // or white when printed and may not show up.  This may be caused by
        // coarse dithering by the printer driver too (see image note below).
        if(pDC->GetDeviceCaps(NUMCOLORS) == 2 && crBG == CLR_DEFAULT)
            crFG = RGB(GetRValue(crFG) * 0.30, GetGValue(crFG) * 0.59,
                GetBValue(crFG) * 0.11);

        // Only erase the background if the color is not the default
        // grid background color.
        if(crBG != CLR_DEFAULT)
        {
            CBrush brush(crBG);
            rect.right++; rect.bottom++;
            pDC->FillRect(rect, &brush);
            rect.right--; rect.bottom--;
        }
    }
    else
    {
        crBG = CLR_DEFAULT;
        crFG = RGB(0, 0, 0);
    }

    pDC->SetTextColor(crFG);

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

    /*
    // ***************************************************
    // Disabled - if you need this functionality then you'll need to rewrite.
    // Create the appropriate font and select into DC.
    CFont Font;
    // Bold the fixed cells if not shading the print out.  Use italic
    // font it it is enabled.
    const LOGFONT* plfFont = GetFont();
    if(IsFixed() && !pGrid->GetShadedPrintOut())
    {
        Font.CreateFont(plfFont->lfHeight, 0, 0, 0, FW_BOLD, plfFont->lfItalic, 0, 0,
            ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
#ifndef _WIN32_WCE
            PROOF_QUALITY,
#else
            DEFAULT_QUALITY,
#endif
            VARIABLE_PITCH | FF_SWISS, plfFont->lfFaceName);
    }
    else
        Font.CreateFontIndirect(plfFont);

    pDC->SelectObject(&Font);
    // ***************************************************
    */

    // Draw lines only when wanted on fixed cells.  Normal cell grid lines
    // are handled in OnPrint.
    if(pGrid->GetGridLines() != GVL_NONE && IsFixed())
    {
        CPen lightpen(PS_SOLID, 1,  ::GetSysColor(COLOR_3DHIGHLIGHT)),
             darkpen(PS_SOLID,  1, ::GetSysColor(COLOR_3DDKSHADOW)),
            *pOldPen = pDC->GetCurrentPen();

        pDC->SelectObject(&lightpen);
        pDC->MoveTo(rect.right, rect.top);
        pDC->LineTo(rect.left, rect.top);
        pDC->LineTo(rect.left, rect.bottom);

        pDC->SelectObject(&darkpen);
        pDC->MoveTo(rect.right, rect.top);
        pDC->LineTo(rect.right, rect.bottom);
        pDC->LineTo(rect.left, rect.bottom);

        rect.DeflateRect(1,1);
        pDC->SelectObject(pOldPen);
    }

    rect.DeflateRect(GetMargin(), 0);

    if(pGrid->GetImageList() && GetImage() >= 0)
    {
        // NOTE: If your printed images look like fuzzy garbage, check the
        //       settings on your printer driver.  If it's using coarse
        //       dithering and/or vector graphics, they may print wrong.
        //       Changing to fine dithering and raster graphics makes them
        //       print properly.  My HP 4L had that problem.

        IMAGEINFO Info;
        if(pGrid->GetImageList()->GetImageInfo(GetImage(), &Info))
        {
            int nImageWidth = Info.rcImage.right-Info.rcImage.left;
            pGrid->GetImageList()->Draw(pDC, GetImage(), rect.TopLeft(), ILD_NORMAL);
            rect.left += nImageWidth+GetMargin();
        }
    }

    // Draw without clipping so as not to lose text when printed for real
	// DT_NOCLIP removed 01.01.01. Slower, but who cares - we are printing!
    DrawText(pDC->m_hDC, GetText(), -1, rect,
        GetFormat() | /*DT_NOCLIP | */ DT_NOPREFIX);

    pDC->RestoreDC(nSavedDC);

    return TRUE;
#endif
}

/*****************************************************************************
Callable by derived classes, only
*****************************************************************************/
LRESULT CGridCellBase::SendMessageToParent(int nRow, int nCol, int nMessage)
{
    CGridCtrl* pGrid = GetGrid();
    if( pGrid)
        return pGrid->SendMessageToParent(nRow, nCol, nMessage);
    else
        return 0;
}