gridctrl.cpp.svn-base

股票软件源码

    // 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

////////////////////////////////////////////////////////////////////////////////////////
// CGridCtrl Cell selection stuff

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());
}

// Enables/Disables redraw for certain operations like columns auto-sizing etc,
// but not for user caused things such as selection changes.
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();
}

// Forces a redraw of a cell immediately (using a direct DC construction, 
// or the supplied dc)
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)
    {
        // Redraw cells directly
        if (nRow < m_nFixedRows || nCol < m_nFixedCols)
        {
            bResult = DrawFixedCell(pDC, nRow, nCol, rect, TRUE);
        }
        else
        {
            bResult = DrawCell(pDC, nRow, nCol, rect, TRUE);
            
            // Since we have erased the background, we will need to redraw the gridlines
            CPen pen;
            TRY {
                pen.CreatePen(PS_SOLID, 0, m_crGridColour);
            } CATCH (CException, e) {e->Delete();} END_CATCH
                
                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
                                        // and hope that OnPaint manages to get one

    if (bMustReleaseDC) 
        ReleaseDC(pDC);

    return bResult;
}

// redraw a complete row
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;
}

// redraw a complete column
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;
}


// Sets the currently selected cell, returning the previous current cell
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); 

        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);

        RedrawCell(m_idCurrentCell);

        if (idPrev.col != m_idCurrentCell.col)
            for (int row = 0; row < m_nFixedRows; row++) 
                RedrawCell(row, m_idCurrentCell.col);
        if (idPrev.row != m_idCurrentCell.row)
            for (int col = 0; col < m_nFixedCols; col++) 
                RedrawCell(m_idCurrentCell.row, col);

        SendMessageToParent(m_idCurrentCell.row, m_idCurrentCell.col, GVN_SELCHANGED); 
    }

    return idPrev;
}

// Sets the range of currently selected cells
void CGridCtrl::SetSelectedRange(const CCellRange& Range, 
                                 BOOL bForceRepaint /* = FALSE */)
{
    SetSelectedRange(Range.GetMinRow(), Range.GetMinCol(), 
                     Range.GetMaxRow(), Range.GetMaxCol(),
                     bForceRepaint);
}

void CGridCtrl::SetSelectedRange(int nMinRow, int nMinCol, int nMaxRow, int nMaxCol,
                                 BOOL bForceRepaint /* = FALSE */)
{
    if (!m_bEnableSelection) return;

    CDC* pDC = NULL;
    if (bForceRepaint) pDC = GetDC();

    // Unselect all previously selected cells
    for (POSITION pos = m_SelectedCellMap.GetStartPosition(); pos != NULL; )
    {
        DWORD key;
        CCellID cell;
        m_SelectedCellMap.GetNextAssoc(pos, key, (CCellID&)cell);

        // Reset the selection flag on the cell
        if (IsValid(cell)) {
            SetItemState(cell.row, cell.col, 
                         GetItemState(cell.row, cell.col) & ~GVIS_SELECTED);

            // If this is to be reselected, continue on past the redraw
            if (nMinRow <= cell.row && cell.row <= nMaxRow &&
                nMinCol <= cell.col && cell.col <= nMaxCol)
                    continue;

            if (bForceRepaint && pDC)                    // Redraw NOW
                RedrawCell(cell.row, cell.col, pDC);
            else
                InvalidateCellRect(cell);                // Redraw at leisure
        }
    }
    
    // if any previous selected cells are to be retained (eg Ctrl is being held down)
    // then copy them to the newly created list, and mark all these cells as
    // selected
    if (!GetSingleRowSelection())
    for (POSITION pos = m_PrevSelectedCellMap.GetStartPosition(); pos != NULL; /* nothing */)
    {
        DWORD key;
        CCellID cell;
        m_PrevSelectedCellMap.GetNextAssoc(pos, key, (CCellID&)cell);

        if (!IsValid(cell))
            continue;

        int nState = GetItemState(cell.row, cell.col);

        // Set state as Selected. This will add the cell to m_SelectedCells[]
        SetItemState(cell.row, cell.col, nState | GVIS_SELECTED);

        // Redraw (immediately or at leisure)
        if (bForceRepaint && pDC)
            RedrawCell(cell.row, cell.col, pDC);
        else
            InvalidateCellRect(cell);
    }

    // Now select all cells in the cell range specified. If the cell has already
    // been marked as selected (above) then ignore it.
    if (nMinRow >= 0 && nMinCol >= 0 && nMaxRow >= 0 && nMaxCol >= 0 &&
        nMaxRow < m_nRows && nMaxCol < m_nCols &&
         nMinRow <= nMaxRow && nMinCol <= nMaxCol)
    {
        for (int row = nMinRow; row <= nMaxRow; row++)
            for (int col = nMinCol; col <= nMaxCol; col++) 
            {
                int nState = GetItemState(row, col);
                if (nState & GVIS_SELECTED)
                    continue;    // Already selected - ignore

                // Add to list of selected cells
                CCellID cell(row, col);

                // Set state as Selected. This will add the cell to m_SelectedCells[]
                SetItemState(row, col, nState | GVIS_SELECTED);

                // Redraw (immediately or at leisure)
                if (bForceRepaint && pDC)
                    RedrawCell(row, col, pDC);
                else
                    InvalidateCellRect(cell);
            }
    }
//    TRACE(_T("%d cells selected.\n"), m_SelectedCellMap.GetCount());

    if (pDC != NULL) 
        ReleaseDC(pDC);
} 

// selects all cells
void CGridCtrl::SelectAllCells()
{
    if (!m_bEnableSelection)
        return;

    SetSelectedRange(m_nFixedRows, m_nFixedCols, GetRowCount()-1, GetColumnCount()-1);
}

// selects columns
void CGridCtrl::SelectColumns(CCellID currentCell)
{
    if (!m_bEnableSelection)
        return;

    //if (currentCell.col == m_idCurrentCell.col) return;
    if (currentCell.col < m_nFixedCols)
        return;
    if (!IsValid(currentCell))
        return;

    SetSelectedRange(GetFixedRowCount(), 
                     min(m_SelectionStartCell.col, currentCell.col), 
                     GetRowCount()-1,    
                     max(m_SelectionStartCell.col, currentCell.col)); 
}

// selects rows
void CGridCtrl::SelectRows(CCellID currentCell)
{  
    if (!m_bEnableSelection)
        return;

    //if (currentCell.row; == m_idCurrentCell.row) return;
    if (currentCell.row < m_nFixedRows)
        return;
    if (!IsValid(currentCell))
        return;

    if (GetListMode() && GetSingleRowSelection())
        SetSelectedRange(currentCell.row, /*GetFixedColumnCount()*/0,
                         currentCell.row, GetColumnCount()-1);
    else 
        SetSelectedRange(min(m_SelectionStartCell.row, currentCell.row),
                         /*GetFixedColumnCount()*/0, 
                         max(m_SelectionStartCell.row, currentCell.row), 
                         GetColumnCount()-1); 
}

// selects cells
void CGridCtrl::SelectCells(CCellID currentCell)
{
    if (!m_bEnableSelection) 
        return;

    int row = currentCell.row;
    int col = currentCell.col;
    if (row < m_nFixedRows || col < m_nFixedCols)
        return;
    if (!IsValid(currentCell))
        return;

    // Prevent unnecessary redraws
    //if (currentCell == m_LeftClickDownCell)  return;
    //else if (currentCell == m_idCurrentCell) return;

    SetSelectedRange(min(m_SelectionStartCell.row, row), 
                     min(m_SelectionStartCell.col, col), 
                     max(m_SelectionStartCell.row, row),
                     max(m_SelectionStartCell.col, col)); 
}

void CGridCtrl::OnSelecting(const CCellID& currentCell)
{
    if (!m_bEnableSelection) 
        return;

    switch(m_MouseMode)
    {
        case MOUSE_SELECT_ALL:   SelectAllCells();            break;
        case MOUSE_SELECT_COL:   SelectColumns(currentCell);  break;
        case MOUSE_SELECT_ROW:   SelectRows(currentCell);     break;
        case MOUSE_SELECT_CELLS: SelectCells(currentCell);    break;
    }
}

#ifndef GRIDCONTROL_NO_CLIPBOARD

////////////////////////////////////////////////////////////////////////////////////////
// Clipboard functions

void CGridCtrl::CutSelectedText()
{
    if (!IsEditable())
        return;

    // Clear contents of selected cells.
    for (POSITION pos = m_SelectedCellMap.GetStartPosition(); pos != NULL; )
    {
        DWORD key;
        CCellID cell;
        m_SelectedCellMap.GetNextAssoc(pos, key, (CCellID&)cell);

        if (!IsCellEditable(cell))
            continue;