gridctrl.cpp

利用VC与SQL实现采集数据的存储、查询、修改等功能。

					}
                }
                else
                {
                    if (bChangeLine) 
                    {
                        SendMessage(WM_VSCROLL, SB_LINEDOWN, 0);
						bVertScrollAction = TRUE;
                        SetScrollPos32(SB_HORZ, 0);
                        break;
                    }
                    else 
					{
						SendMessage(WM_HSCROLL, SB_LINERIGHT, 0);
						bHorzScrollAction = TRUE;
					}
                }
                break;
            }
            EnsureVisible(next); // Make sure cell is visible
            Invalidate();
        }
        EnsureVisible(next); // Make sure cell is visible

		if (bHorzScrollAction)
			SendMessage(WM_HSCROLL, SB_ENDSCROLL, 0);
		if (bVertScrollAction)
			SendMessage(WM_VSCROLL, SB_ENDSCROLL, 0);
    }
}

void CGridCtrl::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    CWnd::OnKeyUp(nChar, nRepCnt, nFlags);
}

void CGridCtrl::OnSysKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
#ifdef GRIDCONTROL_USE_TITLETIPS
    m_TitleTip.Hide();  // hide any titletips
#endif

    CWnd::OnSysKeyDown(nChar, nRepCnt, nFlags);
}

// Instant editing of cells when keys are pressed
void CGridCtrl::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    // EFW - BUG FIX
    if (!IsCTRLpressed() && m_MouseMode == MOUSE_NOTHING && nChar != VK_ESCAPE)
    {
        if (!m_bHandleTabKey || (m_bHandleTabKey && nChar != VK_TAB))
            OnEditCell(m_idCurrentCell.row, m_idCurrentCell.col, CPoint( -1, -1), nChar);
    }

    CWnd::OnChar(nChar, nRepCnt, nFlags);
}

// Added by KiteFly
LRESULT CGridCtrl::OnImeChar(WPARAM wCharCode, LPARAM)
{
    // EFW - BUG FIX
    if (!IsCTRLpressed() && m_MouseMode == MOUSE_NOTHING && wCharCode != VK_ESCAPE) 
        OnEditCell(m_idCurrentCell.row, m_idCurrentCell.col, CPoint( -1, -1), wCharCode);
    return 0;
}

// Callback from any CInPlaceEdits that ended. This just calls OnEndEditCell,
// refreshes the edited cell and moves onto next cell if the return character
// from the edit says we should.
void CGridCtrl::OnEndInPlaceEdit(NMHDR* pNMHDR, LRESULT* pResult)
{
    GV_DISPINFO *pgvDispInfo = (GV_DISPINFO *)pNMHDR;
    GV_ITEM     *pgvItem = &pgvDispInfo->item;

    // In case OnEndInPlaceEdit called as window is being destroyed
    if (!IsWindow(GetSafeHwnd()))
        return;

    OnEndEditCell(pgvItem->row, pgvItem->col, pgvItem->strText);
    //InvalidateCellRect(CCellID(pgvItem->row, pgvItem->col));

    switch (pgvItem->lParam)
    {
    case VK_TAB:
    case VK_DOWN:
    case VK_UP:
    case VK_RIGHT:
    case VK_LEFT:
    case VK_NEXT:
    case VK_PRIOR:
    case VK_HOME:
    case VK_END:
        OnKeyDown(pgvItem->lParam, 0, 0);
        OnEditCell(m_idCurrentCell.row, m_idCurrentCell.col, CPoint( -1, -1), pgvItem->lParam);
    }

    *pResult = 0;
}

// Handle horz scrollbar notifications
void CGridCtrl::OnHScroll(UINT nSBCode, UINT /*nPos*/, CScrollBar* /*pScrollBar*/)
{
    EndEditing();

#ifndef GRIDCONTROL_NO_TITLETIPS
    m_TitleTip.Hide();  // hide any titletips
#endif

    int scrollPos = GetScrollPos32(SB_HORZ);

    CCellID idTopLeft = GetTopleftNonFixedCell();

    CRect rect;
    GetClientRect(rect);

    switch (nSBCode)
    {
    case SB_LINERIGHT:
        if (scrollPos < m_nHScrollMax)
        {
            // may have contiguous hidden columns.  Blow by them
            while (idTopLeft.col < (GetColumnCount()-1)
                    && GetColumnWidth( idTopLeft.col) < 1 )
            {
                idTopLeft.col++;
            }
            int xScroll = GetColumnWidth(idTopLeft.col);
            SetScrollPos32(SB_HORZ, scrollPos + xScroll);
            if (GetScrollPos32(SB_HORZ) == scrollPos)
                break;          // didn't work

            rect.left = GetFixedColumnWidth();
            //rect.left = GetFixedColumnWidth() + xScroll;
            //ScrollWindow(-xScroll, 0, rect);
            //rect.left = rect.right - xScroll;
            InvalidateRect(rect);
        }
        break;

    case SB_LINELEFT:
        if (scrollPos > 0 && idTopLeft.col > GetFixedColumnCount())
        {
            int iColToUse = idTopLeft.col-1;
            // may have contiguous hidden columns.  Blow by them
            while(  iColToUse > GetFixedColumnCount()
                    && GetColumnWidth( iColToUse) < 1 )
            {
                iColToUse--;
            }

            int xScroll = GetColumnWidth(iColToUse);
            SetScrollPos32(SB_HORZ, max(0, scrollPos - xScroll));
            rect.left = GetFixedColumnWidth();
            //ScrollWindow(xScroll, 0, rect);
            //rect.right = rect.left + xScroll;
            InvalidateRect(rect);
        }
        break;

    case SB_PAGERIGHT:
        if (scrollPos < m_nHScrollMax)
        {
            rect.left = GetFixedColumnWidth();
            int offset = rect.Width();
            int pos = min(m_nHScrollMax, scrollPos + offset);
            SetScrollPos32(SB_HORZ, pos);
            rect.left = GetFixedColumnWidth();
            InvalidateRect(rect);
        }
        break;
        
    case SB_PAGELEFT:
        if (scrollPos > 0)
        {
            rect.left = GetFixedColumnWidth();
            int offset = -rect.Width();
            int pos = max(0, scrollPos + offset);
            SetScrollPos32(SB_HORZ, pos);
            rect.left = GetFixedColumnWidth();
            InvalidateRect(rect);
        }
        break;
        
    case SB_THUMBPOSITION:
    case SB_THUMBTRACK:
        {
            SetScrollPos32(SB_HORZ, GetScrollPos32(SB_HORZ, TRUE));
            m_idTopLeftCell.row = -1;
            CCellID idNewTopLeft = GetTopleftNonFixedCell();
            if (idNewTopLeft != idTopLeft)
            {
                rect.left = GetFixedColumnWidth();
                InvalidateRect(rect);
            }
        }
        break;
        
    case SB_LEFT:
        if (scrollPos > 0)
        {
            SetScrollPos32(SB_HORZ, 0);
            Invalidate();
        }
        break;
        
    case SB_RIGHT:
        if (scrollPos < m_nHScrollMax)
        {
            SetScrollPos32(SB_HORZ, m_nHScrollMax);
            Invalidate();
        }
        break;
        
        
    default: 
        break;
    }
}

// Handle vert scrollbar notifications
void CGridCtrl::OnVScroll(UINT nSBCode, UINT /*nPos*/, CScrollBar* /*pScrollBar*/)
{
    EndEditing();

#ifndef GRIDCONTROL_NO_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)
        {
            // may have contiguous hidden rows.  Blow by them
            while(  idTopLeft.row < (GetRowCount()-1)
                    && GetRowHeight( idTopLeft.row) < 1 )
            {
                idTopLeft.row++;
            }

            int yScroll = GetRowHeight(idTopLeft.row);
            SetScrollPos32(SB_VERT, scrollPos + yScroll);
            if (GetScrollPos32(SB_VERT) == scrollPos)
                break;          // didn't work

            rect.top = GetFixedRowHeight();
            //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 iRowToUse = idTopLeft.row-1;
            // may have contiguous hidden rows.  Blow by them
            while(  iRowToUse > GetFixedRowCount()
                    && GetRowHeight( iRowToUse) < 1 )
            {
                iRowToUse--;
            }

            int yScroll = GetRowHeight( iRowToUse);
            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));
            m_idTopLeftCell.row = -1;
            CCellID idNewTopLeft = GetTopleftNonFixedCell();
            if (idNewTopLeft != idTopLeft)
            {
                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)
{
    if (!m_bAllowDraw)
        return;

    CRect clipRect;
    if (pDC->GetClipBox(&clipRect) == ERROR)
        return;

    EraseBkgnd(pDC);            // OnEraseBkgnd does nothing, so erase bkgnd here.
    // This necessary since we may be using a Memory DC.

#ifdef _DEBUG
	LARGE_INTEGER iStartCount;
	QueryPerformanceCounter(&iStartCount);
#endif

    CRect rect;
    int row, col;
    CGridCellBase* pCell;

    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();

    if (GetVirtualMode())
        SendCacheHintToParent(VisCellRange);

    // draw top-left cells 0..m_nFixedRows-1, 0..m_nFixedCols-1
    rect.bottom = -1;
    for (row = 0; row < m_nFixedRows; row++)
    {
        if (GetRowHeight(row) <= 0) continue;

        rect.top = rect.bottom+1;
        rect.bottom = rect.top + GetRowHeight(row)-1;
        rect.right = -1;

        for (col = 0; col < m_nFixedCols; col++)
        {
            if (GetColumnWidth(col) <= 0) continue;

            rect.left = rect.right+1;
            rect.right = rect.left + GetColumnWidth(col)-1;

            pCell = GetCell(row, col);
            if (pCell)
			{