gridctrl.cpp

一个完整的数字硬盘录像机系统软件

            break;
        default: break;
    }
}
///////////////////////////////////////////////////////////////////////////////////
// Handle vert scrollbar notifications
///////////////////////////////////////////////////////////////////////////////////
void CGridCtrl::OnVScroll(UINT nSBCode, UINT /*nPos*/, CScrollBar* /*pScrollBar*/)
{
    if (GetFocus()->GetSafeHwnd() != GetSafeHwnd()) 
        SetFocus();        // Auto-destroy any InPlaceEdit's
#ifdef GRIDCONTROL_USE_TITLETIPS
    m_TitleTip.Hide();  // hide any titletips
#endif
    // Get the scroll position ourselves to ensure we get a 32 bit value
    int scrollPos = GetScrollPos32(SB_VERT);
    CCellID idTopLeft = GetTopleftNonFixedCell();
    CRect rect;
    GetClientRect(rect);
    switch (nSBCode)
    {
        case SB_LINEDOWN:
            if (scrollPos < m_nVScrollMax)
            {
                int yScroll = GetRowHeight(idTopLeft.row);
                SetScrollPos32(SB_VERT, scrollPos + yScroll);
                if (GetScrollPos32(SB_VERT) == scrollPos) break;          // didn't work

                rect.top = GetFixedRowHeight() + yScroll;
                ScrollWindow( 0, -yScroll, rect);
                rect.top = rect.bottom - yScroll;
                InvalidateRect(rect);
            }
            break;
        case SB_LINEUP:
            if (scrollPos > 0 && idTopLeft.row > GetFixedRowCount())
            {
                int yScroll = GetRowHeight(idTopLeft.row-1);
                SetScrollPos32(SB_VERT, max(0, scrollPos - yScroll));
                rect.top = GetFixedRowHeight();
                ScrollWindow(0, yScroll, rect);
                rect.bottom = rect.top + yScroll;
                InvalidateRect(rect);
            }
            break;
        case SB_PAGEDOWN:
            if (scrollPos < m_nVScrollMax)
            {
                rect.top = GetFixedRowHeight();
                scrollPos = min(m_nVScrollMax, scrollPos + rect.Height());
                SetScrollPos32(SB_VERT, scrollPos);
                rect.top = GetFixedRowHeight();
                InvalidateRect(rect);
            }
            break;
        case SB_PAGEUP:
            if (scrollPos > 0)
            {
                rect.top = GetFixedRowHeight();
                int offset = -rect.Height();
                int pos = max(0, scrollPos + offset);
                SetScrollPos32(SB_VERT, pos);
                rect.top = GetFixedRowHeight();
                InvalidateRect(rect);
            }
            break;
        case SB_THUMBPOSITION:
        case SB_THUMBTRACK:
            {
                SetScrollPos32(SB_VERT, GetScrollPos32(SB_VERT, TRUE));
                rect.top = GetFixedRowHeight();
                InvalidateRect(rect);
            }
            break;

        case SB_TOP:
            if (scrollPos > 0)
            {
                SetScrollPos32(SB_VERT, 0);
                Invalidate();
            }
            break;

        case SB_BOTTOM:
            if (scrollPos < m_nVScrollMax)
            {
                SetScrollPos32(SB_VERT, m_nVScrollMax);
                Invalidate();
            }

        default: break;
    }
}
/////////////////////////////////////////////////////////////////////////////
// CGridCtrl implementation functions
////////////////////////////////////////////////////////////////////////////
void CGridCtrl::OnDraw(CDC* pDC)
{
    CRect rect;
    int row,col;
    CRect clipRect;
    if (pDC->GetClipBox(&clipRect) == ERROR) return;
    EraseBkgnd(pDC);
    int nFixedRowHeight = GetFixedRowHeight();
    int nFixedColWidth  = GetFixedColumnWidth();
    CCellID idTopLeft = GetTopleftNonFixedCell();
    int minVisibleRow = idTopLeft.row,
        minVisibleCol = idTopLeft.col;
    CRect VisRect;
    CCellRange VisCellRange = GetVisibleNonFixedCellRange(VisRect);
    int maxVisibleRow = VisCellRange.GetMaxRow(),
        maxVisibleCol = VisCellRange.GetMaxCol();
    rect.bottom = -1;
    for (row = 0; row < m_nFixedRows; row++)
    {
        rect.top = rect.bottom+1;
        rect.bottom = rect.top + GetRowHeight(row)-1;
        rect.right = -1;
        for (col = 0; col < m_nFixedCols; col++)
        {
            rect.left = rect.right+1;
            rect.right = rect.left + GetColumnWidth(col)-1;
            DrawFixedCell(pDC, row, col, rect);
        }
    }
    rect.bottom = nFixedRowHeight-1;
    for (row = minVisibleRow; row <= maxVisibleRow; row++)
    {
        rect.top = rect.bottom+1;
        rect.bottom = rect.top + GetRowHeight(row)-1;
        if (rect.top > clipRect.bottom) break;                // Gone past cliprect
        if (rect.bottom < clipRect.top) continue;             // Reached cliprect yet?
        rect.right = -1;
        for (col = 0; col < m_nFixedCols; col++)
        {
            rect.left = rect.right+1;
            rect.right = rect.left + GetColumnWidth(col)-1;
            if (rect.left > clipRect.right) break;            // gone past cliprect
            if (rect.right < clipRect.left) continue;         // Reached cliprect yet?
            DrawFixedCell(pDC, row, col, rect);
        }
    }
    // draw fixed row cells  0..m_nFixedRows, m_nFixedCols..n
    rect.bottom = -1;
    for (row = 0; row < m_nFixedRows; row++)
    {
        rect.top = rect.bottom+1;
        rect.bottom = rect.top + GetRowHeight(row)-1;
        // rect.bottom = bottom pixel of previous row
        if (rect.top > clipRect.bottom) break;                // Gone past cliprect
        if (rect.bottom < clipRect.top) continue;             // Reached cliprect yet?
        rect.right = nFixedColWidth-1;
        for (col = minVisibleCol; col <= maxVisibleCol; col++)
        {                                       
            rect.left = rect.right+1;
            rect.right = rect.left + GetColumnWidth(col)-1;
            if (rect.left > clipRect.right) break;        // gone past cliprect
            if (rect.right < clipRect.left) continue;     // Reached cliprect yet?
            DrawFixedCell(pDC, row, col, rect);
        }
    }
    // draw rest of non-fixed cells
    rect.bottom = nFixedRowHeight-1;
    for (row = minVisibleRow; row <= maxVisibleRow; row++)
    {
        rect.top = rect.bottom+1;
        rect.bottom = rect.top + GetRowHeight(row)-1;
        // rect.bottom = bottom pixel of previous row
        if (rect.top > clipRect.bottom) break;                // Gone past cliprect
        if (rect.bottom < clipRect.top) continue;             // Reached cliprect yet?
        rect.right = nFixedColWidth-1;
        for (col = minVisibleCol; col <= maxVisibleCol; col++)
        {
            rect.left = rect.right+1;
            rect.right = rect.left + GetColumnWidth(col)-1;

            if (rect.left > clipRect.right) break;        // gone past cliprect
            if (rect.right < clipRect.left) continue;     // Reached cliprect yet?

            DrawCell(pDC, row, col, rect);
        }
    }
    CPen pen;
    try 
	{
        pen.CreatePen(PS_SOLID, 0, m_crGridColour);
    }
    catch (CResourceException *e)
    {
        e->Delete();
        return;
    }
    pDC->SelectObject(&pen);
    // draw vertical lines (drawn at ends of cells)
    if (m_nGridLines == GVL_BOTH || m_nGridLines == GVL_VERT) 
    {
        int x = nFixedColWidth;
        for (col = minVisibleCol; col <= maxVisibleCol; col++) {
            x += GetColumnWidth(col);
            pDC->MoveTo(x-1, nFixedRowHeight);
            pDC->LineTo(x-1, VisRect.bottom);   
        }
    }
    // draw horizontal lines (drawn at bottom of each cell)
    if (m_nGridLines == GVL_BOTH || m_nGridLines == GVL_HORZ) 
    {
        int y = nFixedRowHeight;
        for (row = minVisibleRow; row <= maxVisibleRow; row++) {
            y += GetRowHeight(row);
            pDC->MoveTo(nFixedColWidth, y-1);    
            pDC->LineTo(VisRect.right,  y-1);
        }
    }
    pDC->SelectStockObject(NULL_PEN);
#ifdef USE_MEMDC                        // Use a memDC for flicker free update
}
#else                                   // Use normal DC - this helps in debugging
}
#endif
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::IsValid(int nRow, int nCol) const
{
    return (nRow >= 0 && nRow < m_nRows && nCol >= 0 && nCol < m_nCols);
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::IsValid(const CCellID& cell) const
{
    return IsValid(cell.row, cell.col);
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::IsValid(const CCellRange& range) const
{
     return (range.GetMinRow() >= 0 && range.GetMinCol() >= 0 && 
            range.GetMaxRow() >= 0 && range.GetMaxCol() >= 0 &&
            range.GetMaxRow() < m_nRows && range.GetMaxCol() < m_nCols &&
             range.GetMinRow() <= range.GetMaxRow() && range.GetMinCol() <= range.GetMaxCol());
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
void CGridCtrl::SetRedraw(BOOL bAllowDraw, BOOL bResetScrollBars /* = FALSE */)
{
    TRACE(_T("%s: Setting redraw to %s\n"), 
             GetRuntimeClass()->m_lpszClassName, bAllowDraw? _T("TRUE") : _T("FALSE"));
    if (bAllowDraw && !m_bAllowDraw) Invalidate();
    m_bAllowDraw = bAllowDraw;
    if (bResetScrollBars) ResetScrollBars();
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::RedrawCell(const CCellID& cell, CDC* pDC /* = NULL */)
{
    return RedrawCell(cell.row, cell.col, pDC);
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::RedrawCell(int nRow, int nCol, CDC* pDC /* = NULL */)
{
    BOOL bResult = TRUE;
    BOOL bMustReleaseDC = FALSE;
    if (!m_bAllowDraw || !IsCellVisible(nRow, nCol)) 
		return FALSE;
    CRect rect;
    if (!GetCellRect(nRow, nCol, rect)) 
		return FALSE;
    if (!pDC) 
	{
        pDC = GetDC();
        if (pDC) bMustReleaseDC = TRUE;
    }
    if (pDC)
    {
        if (nRow < m_nFixedRows || nCol < m_nFixedCols)
            bResult = DrawFixedCell(pDC, nRow, nCol, rect, TRUE);
        else
            bResult = DrawCell(pDC, nRow, nCol, rect, TRUE);
        CPen pen;
        TRY 
		{
            pen.CreatePen(PS_SOLID, 0, m_crGridColour);
        }
		CATCH_ALL(e) 
		{
		}
        END_CATCH_ALL
        CPen* pOldPen = (CPen*) pDC->SelectObject(&pen);
        if (m_nGridLines == GVL_BOTH || m_nGridLines == GVL_HORZ) 
        {
            pDC->MoveTo(rect.left,    rect.bottom);
            pDC->LineTo(rect.right+1, rect.bottom);
        }
        if (m_nGridLines == GVL_BOTH || m_nGridLines == GVL_VERT) 
        {
            pDC->MoveTo(rect.right, rect.top);
            pDC->LineTo(rect.right, rect.bottom+1);    
        }
        pDC->SelectObject(pOldPen);

    } 
	else
        InvalidateRect(rect, TRUE);     // Could not get a DC - invalidate it anyway
     if (bMustReleaseDC) 
        ReleaseDC(pDC);
    return bResult;
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::RedrawRow(int row)
{
    BOOL bResult = TRUE;
    CDC* pDC = GetDC();
    for (int col = 0; col < GetColumnCount(); col++)
        bResult = RedrawCell(row, col, pDC) && bResult;
    if (pDC) ReleaseDC(pDC);
    return bResult;
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
BOOL CGridCtrl::RedrawColumn(int col)
{
    BOOL bResult = TRUE;
    CDC* pDC = GetDC();
    for (int row = 0; row < GetRowCount(); row++)
        bResult = RedrawCell(row, col, pDC) && bResult;
    if (pDC) ReleaseDC(pDC);
    return bResult;
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
CCellID CGridCtrl::SetFocusCell(int nRow, int nCol)
{
    return SetFocusCell(CCellID(nRow, nCol));
}
//////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////
CCellID CGridCtrl::SetFocusCell(CCellID cell)
{
    if (cell == m_idCurrentCell) 
        return m_idCurrentCell;
    CCellID idPrev = m_idCurrentCell;
    m_idCurrentCell = cell;
    if (IsValid(idPrev)) 
    {
        SendMessageToParent(idPrev.row, idPrev.col,GVN_SELCHANGING,GetItemText(m_idCurrentCell.row,m_idCurrentCell.col)); 
        SetItemState(idPrev.row, idPrev.col, 
                     GetItemState(idPrev.row, idPrev.col) & ~GVIS_FOCUSED);
        RedrawCell(idPrev);
        if (idPrev.col != m_idCurrentCell.col)
            for (int row = 0; row < m_nFixedRows; row++)
                RedrawCell(row, idPrev.col);
        if (idPrev.row != m_idCurrentCell.row)
            for (int col = 0; col < m_nFixedCols; col++) 
                RedrawCell(idPrev.row, col);
    }
    if (IsValid(m_idCurrentCell)) 
	{
        SetItemState(m_idCurrentCell.row, m_idCurrentCell.col, 
                     GetItemState(m_idCurrentCell.row, m_idCurrentCell.col) | GVIS_FOCUSED);