gridctrl.cpp

操作系统演示程序

        wndcls.hCursor          = AfxGetApp()->LoadStandardCursor(IDC_ARROW);
        wndcls.hbrBackground    = (HBRUSH) (COLOR_3DFACE + 1);
        wndcls.lpszMenuName     = NULL;
        wndcls.lpszClassName    = GRIDCTRL_CLASSNAME;

        if (!AfxRegisterClass(&wndcls)) {
            AfxThrowResourceException();
            return FALSE;
        }
    }

    return TRUE;
}

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;

#ifndef GRIDCONTROL_NO_DRAGDROP
    m_DropTarget.Register(this);
#endif

    // Create titletips
#ifndef GRIDCONTROL_NO_TITLETIPS
    if (m_bTitleTips)        
        m_TitleTip.Create(this);
#endif

    // 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();
        e->Delete();
        return FALSE;
    }
    END_CATCH

    for (int i = 0; i < m_nRows; i++) m_arRowHeights[i] = m_nDefCellHeight;
    for (i = 0; i < m_nCols; i++)      m_arColWidths[i] = m_nDefCellWidth;

    ResetScrollBars();
    return TRUE;
}

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

    HFONT hFont = ::CreateFontIndirect(&m_Logfont);
    OnSetFont((LPARAM)hFont, 0);
    DeleteObject(hFont);
    
    ResetScrollBars();   
}

BOOL CGridCtrl::SubclassWindow(HWND hWnd) 
{    
    if (!CWnd::SubclassWindow(hWnd))
        return FALSE;

#ifndef GRIDCONTROL_NO_DRAGDROP
    m_DropTarget.Register(this);
#endif

#ifndef GRIDCONTROL_NO_TITLETIPS
    if (m_bTitleTips && !IsWindow(m_TitleTip.m_hWnd))
        m_TitleTip.Create(this);
#endif

    return TRUE;
}

LRESULT CGridCtrl::SendMessageToParent(int nRow, int nCol, int nMessage)
{
    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;
}

BEGIN_MESSAGE_MAP(CGridCtrl, CWnd)
    //{{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_COMMAND(ID_EDIT_SELECT_ALL, OnEditSelectAll)
    ON_UPDATE_COMMAND_UI(ID_EDIT_SELECT_ALL, OnUpdateEditSelectAll)
    //}}AFX_MSG_MAP
#ifndef _WIN32_WCE_NO_CURSOR
    ON_WM_SETCURSOR()
#endif
#ifndef _WIN32_WCE
    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 !defined(_WIN32_WCE) && (_MFC_VER >= 0x0421)
    ON_WM_MOUSEWHEEL()
#endif
#if (_WIN32_WCE >= 210)
    ON_WM_SETTINGCHANGE()
#endif
    ON_MESSAGE(WM_SETFONT, OnSetFont)
    ON_MESSAGE(WM_GETFONT, OnGetFont)
    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 FixedBack(GetFixedBkColor()),
           TextBack(GetTextBkColor()),
           Back(GetBkColor());

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

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

    // 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;

    // Start re-entry blocking
    bAlreadyInsideThisProcedure = TRUE;

//    if (::IsWindow(GetSafeHwnd()) && GetFocus()->GetSafeHwnd() != GetSafeHwnd()) 
        SetFocus();        // Auto-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 (GetTextColor() == m_crWindowText)                   // Still using system colours
        SetTextColor(::GetSysColor(COLOR_WINDOWTEXT));      // set to new system colour
    if (GetTextBkColor() == m_crWindowColour)
        SetTextBkColor(::GetSysColor(COLOR_WINDOW));
    if (GetBkColor() == m_crShadow)
        SetBkColor(::GetSysColor(COLOR_3DSHADOW));
    if (GetFixedTextColor() == m_crWindowText)
        SetFixedTextColor(::GetSysColor(COLOR_WINDOWTEXT));
    if (GetFixedBkColor() == m_cr3DFace)
        SetFixedBkColor(::GetSysColor(COLOR_3DFACE));

    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) 
{
    CWnd::OnSettingChange(uFlags, lpszSection);
    
    if (GetTextColor() == m_crWindowText)                   // Still using system colours
        SetTextColor(::GetSysColor(COLOR_WINDOWTEXT));      // set to new system colour
    if (GetTextBkColor() == m_crWindowColour)
        SetTextBkColor(::GetSysColor(COLOR_WINDOW));
    if (GetBkColor() == m_crShadow)
        SetBkColor(::GetSysColor(COLOR_3DSHADOW));
    if (GetFixedTextColor() == m_crWindowText)
        SetFixedTextColor(::GetSysColor(COLOR_WINDOWTEXT));
    if (GetFixedBkColor() == m_cr3DFace)
        SetFixedBkColor(::GetSysColor(COLOR_3DFACE));

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

    m_nRowsPerWheelNotch = GetMouseScrollLines(); // Get the number of lines
}
#endif

// For drag-selection. Scrolls hidden cells into view
// TODO: decrease timer interval over time to speed up selection over time
void CGridCtrl::OnTimer(UINT nIDEvent)
{
    ASSERT(nIDEvent == WM_LBUTTONDOWN);
    if (nIDEvent != WM_LBUTTONDOWN)
        return;

    CPoint pt, origPt;

#ifdef _WIN32_WCE
    if (m_MouseMode == MOUSE_NOTHING)
        return;
    origPt = GetMessagePos();
#else
    if (!GetCursorPos(&origPt))
        return;
#endif

    ScreenToClient(&origPt);

    CRect rect;
    GetClientRect(rect);

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

    pt = origPt;
    if (pt.y > rect.bottom)
    {
        //SendMessage(WM_VSCROLL, SB_LINEDOWN, 0);
        SendMessage(WM_KEYDOWN, VK_DOWN, 0);

        if (pt.x < rect.left)  
            pt.x = rect.left;
        if (pt.x > rect.right) 
            pt.x = rect.right;
        pt.y = rect.bottom;
        OnSelecting(GetCellFromPt(pt));
    }
    else if (pt.y < nFixedRowHeight)
    {
        //SendMessage(WM_VSCROLL, SB_LINEUP, 0);
        SendMessage(WM_KEYDOWN, VK_UP, 0);

        if (pt.x < rect.left)  
            pt.x = rect.left;
        if (pt.x > rect.right) 
            pt.x = rect.right;