sizecbar.cpp

一个非常好的词法分析程序,加上语法的分析是一个难得一见的好实例

BOOL CSizingControlBar::GetEdgeRect(CRect rcWnd, UINT nHitTest,
                                    CRect& rcEdge)
{
    rcEdge = rcWnd;
    if (m_dwSCBStyle & SCBS_SHOWEDGES)
        rcEdge.DeflateRect(1, 1);
    BOOL bHorz = IsHorzDocked();

    switch (nHitTest)
    {
    case HTLEFT:
        if (!(m_dwSCBStyle & SCBS_EDGELEFT)) return FALSE;
        rcEdge.right = rcEdge.left + m_cxEdge;
        rcEdge.DeflateRect(0, bHorz ? m_cxEdge: 0);
        break;
    case HTTOP:
        if (!(m_dwSCBStyle & SCBS_EDGETOP)) return FALSE;
        rcEdge.bottom = rcEdge.top + m_cxEdge;
        rcEdge.DeflateRect(bHorz ? 0 : m_cxEdge, 0);
        break;
    case HTRIGHT:
        if (!(m_dwSCBStyle & SCBS_EDGERIGHT)) return FALSE;
        rcEdge.left = rcEdge.right - m_cxEdge;
        rcEdge.DeflateRect(0, bHorz ? m_cxEdge: 0);
        break;
    case HTBOTTOM:
        if (!(m_dwSCBStyle & SCBS_EDGEBOTTOM)) return FALSE;
        rcEdge.top = rcEdge.bottom - m_cxEdge;
        rcEdge.DeflateRect(bHorz ? 0 : m_cxEdge, 0);
        break;
    default:
        ASSERT(FALSE); // invalid hit test code
    }
    return TRUE;
}

UINT CSizingControlBar::GetEdgeHTCode(int nEdge)
{
    if (nEdge == 0) return HTLEFT;
    if (nEdge == 1) return HTTOP;
    if (nEdge == 2) return HTRIGHT;
    if (nEdge == 3) return HTBOTTOM;
    ASSERT(FALSE); // invalid edge no
    return HTNOWHERE;
}

void CSizingControlBar::GetRowInfo(int& nFirst, int& nLast, int& nThis)
{
    ASSERT_VALID(m_pDockBar); // verify bounds

    nThis = m_pDockBar->FindBar(this);
    ASSERT(nThis != -1);

    int i, nBars = m_pDockBar->m_arrBars.GetSize();

    // find the first and the last bar in row
    for (nFirst = -1, i = nThis - 1; i >= 0 && nFirst == -1; i--)
        if (m_pDockBar->m_arrBars[i] == NULL)
            nFirst = i + 1;
    for (nLast = -1, i = nThis + 1; i < nBars && nLast == -1; i++)
        if (m_pDockBar->m_arrBars[i] == NULL)
            nLast = i - 1;

    ASSERT((nLast != -1) && (nFirst != -1));
}

void CSizingControlBar::GetRowSizingBars(CSCBArray& arrSCBars)
{
    arrSCBars.RemoveAll();

    int nFirst, nLast, nThis;
    GetRowInfo(nFirst, nLast, nThis);

    for (int i = nFirst; i <= nLast; i++)
    {
        CControlBar* pBar = (CControlBar*)m_pDockBar->m_arrBars[i];
        if (HIWORD(pBar) == 0) continue; // placeholder
        if (!pBar->IsVisible()) continue;
        if (FindSizingBar(pBar) >= 0)
            arrSCBars.Add((CSizingControlBar*)pBar);
    }
}

const int CSizingControlBar::FindSizingBar(CControlBar* pBar) const
{
    for (int nPos = 0; nPos < m_arrBars.GetSize(); nPos++)
        if (m_arrBars[nPos] == pBar)
            return nPos; // got it

    return -1; // not found
}

BOOL CSizingControlBar::NegociateSpace(int nLengthAvail, BOOL bHorz)
{
    ASSERT(bHorz == IsHorzDocked());

    int nFirst, nLast, nThis;
    GetRowInfo(nFirst, nLast, nThis);

    // step 1: subtract the visible fixed bars' lengths
    for (int i = nFirst; i <= nLast; i++)
    {
        CControlBar* pFBar = (CControlBar*)m_pDockBar->m_arrBars[i];
        if (HIWORD(pFBar) == 0) continue; // placeholder
        if (!pFBar->IsVisible() || (FindSizingBar(pFBar) >= 0)) continue;

        CRect rcBar;
        pFBar->GetWindowRect(&rcBar);

        nLengthAvail -= (bHorz ? rcBar.Width() - 2 : rcBar.Height() - 2);
    }

    CSCBArray arrSCBars;
    GetRowSizingBars(arrSCBars);
    CSizingControlBar* pBar;

    // step 2: compute actual and min lengths; also the common width
    int nActualLength = 0;
    int nMinLength = 2;
    int nWidth = 0;
    for (i = 0; i < arrSCBars.GetSize(); i++)
    {
        pBar = arrSCBars[i];
        nActualLength += bHorz ? pBar->m_szHorz.cx - 2 :
            pBar->m_szVert.cy - 2;
        nMinLength += bHorz ? pBar->m_szMin.cx - 2:
            pBar->m_szMin.cy - 2;
        nWidth = max(nWidth, bHorz ? pBar->m_szHorz.cy :
            pBar->m_szVert.cx);
    }
    
    // step 3: pop the bar out of the row if not enough room
    if (nMinLength > nLengthAvail)
    {
        if (nFirst < nThis || nThis < nLast)
        {   // not enough room - create a new row
            m_pDockBar->m_arrBars.InsertAt(nLast + 1, this);
            m_pDockBar->m_arrBars.InsertAt(nLast + 1, (CControlBar*) NULL);
            m_pDockBar->m_arrBars.RemoveAt(nThis);
        }
        return FALSE;
    }

    // step 4: make the bars same width
    for (i = 0; i < arrSCBars.GetSize(); i++)
        if (bHorz)
            arrSCBars[i]->m_szHorz.cy = nWidth;
        else
            arrSCBars[i]->m_szVert.cx = nWidth;

    if (nActualLength == nLengthAvail)
        return TRUE; // no change

    // step 5: distribute the difference between the bars, but
    //         don't shrink them below minsize
    int nDelta = nLengthAvail - nActualLength;

    while (nDelta != 0)
    {
        int nDeltaOld = nDelta;
        for (i = 0; i < arrSCBars.GetSize(); i++)
        {
            pBar = arrSCBars[i];
            int nLMin = bHorz ? pBar->m_szMin.cx : pBar->m_szMin.cy;
            int nL = bHorz ? pBar->m_szHorz.cx : pBar->m_szVert.cy;
            
            if ((nL == nLMin) && (nDelta < 0) || // already at min length
                pBar->m_bKeepSize) // or wants to keep its size
                continue;
            
            // sign of nDelta
            int nDelta2 = (nDelta == 0) ? 0 : ((nDelta < 0) ? -1 : 1);

            (bHorz ? pBar->m_szHorz.cx : pBar->m_szVert.cy) += nDelta2;
            nDelta -= nDelta2;
            if (nDelta == 0) break;
        }
        // clear m_bKeepSize flags
        if ((nDeltaOld == nDelta) || (nDelta == 0))
            for (i = 0; i < arrSCBars.GetSize(); i++)
                arrSCBars[i]->m_bKeepSize = FALSE;
    }

    return TRUE;
}

void CSizingControlBar::AlignControlBars()
{
    int nFirst, nLast, nThis;
    GetRowInfo(nFirst, nLast, nThis);

    BOOL bHorz = IsHorzDocked();
    BOOL bNeedRecalc = FALSE;
    int nPos, nAlign = bHorz ? -2 : 0;

    CRect rc, rcDock;
    m_pDockBar->GetWindowRect(&rcDock);

    for (int i = nFirst; i <= nLast; i++)
    {
        CControlBar* pBar = (CControlBar*)m_pDockBar->m_arrBars[i];
        if (HIWORD(pBar) == 0) continue; // placeholder
        if (!pBar->IsVisible()) continue;

        pBar->GetWindowRect(&rc);
        rc.OffsetRect(-rcDock.TopLeft());

        if ((nPos = FindSizingBar(pBar)) >= 0)
            rc = CRect(rc.TopLeft(), bHorz ?
                m_arrBars[nPos]->m_szHorz : m_arrBars[nPos]->m_szVert);

        if ((bHorz ? rc.left : rc.top) != nAlign)
        {
            if (!bHorz)
                rc.OffsetRect(0, nAlign - rc.top - 2);
            else if (m_nDockBarID == AFX_IDW_DOCKBAR_TOP)
                rc.OffsetRect(nAlign - rc.left, -2);
            else
                rc.OffsetRect(nAlign - rc.left, 0);
            pBar->MoveWindow(rc);
            bNeedRecalc = TRUE;
        }
        nAlign += (bHorz ? rc.Width() : rc.Height()) - 2;
    }

    if (bNeedRecalc)
    {
        m_pDockSite->DelayRecalcLayout();
        TRACE("ccc\n");
    }
}

void CSizingControlBar::OnUpdateCmdUI(CFrameWnd* pTarget, BOOL bDisableIfNoHndler)
{
    BOOL bNeedPaint = FALSE;

    CPoint pt;
    ::GetCursorPos(&pt);
    BOOL bHit = (OnNcHitTest(pt) == HTCLOSE);
    BOOL bLButtonDown = (::GetKeyState(VK_LBUTTON) < 0);

    BOOL bWasPushed = m_biHide.bPushed;
    m_biHide.bPushed = bHit && bLButtonDown;

    BOOL bWasRaised = m_biHide.bRaised;
    m_biHide.bRaised = bHit && !bLButtonDown;

    bNeedPaint |= (m_biHide.bPushed ^ bWasPushed) || 
                  (m_biHide.bRaised ^ bWasRaised);

    if (bNeedPaint)
        SendMessage(WM_NCPAINT);
}

void CSizingControlBar::LoadState(LPCTSTR lpszProfileName)
{
    ASSERT_VALID(this);
    ASSERT(GetSafeHwnd()); // must be called after Create()

    CWinApp* pApp = AfxGetApp();

    TCHAR szSection[256];
    wsprintf(szSection, _T("%s-SCBar-%d"), lpszProfileName,
        GetDlgCtrlID());

    m_szHorz.cx = max(m_szMin.cx, (int) pApp->GetProfileInt(szSection,
        _T("sizeHorzCX"), m_szHorz.cx));
    m_szHorz.cy = max(m_szMin.cy, (int) pApp->GetProfileInt(szSection, 
        _T("sizeHorzCY"), m_szHorz.cy));

    m_szVert.cx = max(m_szMin.cx, (int) pApp->GetProfileInt(szSection, 
        _T("sizeVertCX"), m_szVert.cx));
    m_szVert.cy = max(m_szMin.cy, (int) pApp->GetProfileInt(szSection, 
        _T("sizeVertCY"), m_szVert.cy));

    m_szFloat.cx = max(m_szMin.cx, (int) pApp->GetProfileInt(szSection,
        _T("sizeFloatCX"), m_szFloat.cx));
    m_szFloat.cy = max(m_szMin.cy, (int) pApp->GetProfileInt(szSection,
        _T("sizeFloatCY"), m_szFloat.cy));
}

void CSizingControlBar::SaveState(LPCTSTR lpszProfileName)
{
    // place your SaveState or GlobalSaveState call in
    // CMainFrame::DestroyWindow(), not in OnDestroy()
    ASSERT_VALID(this);
    ASSERT(GetSafeHwnd());

    CWinApp* pApp = AfxGetApp();

    TCHAR szSection[256];
    wsprintf(szSection, _T("%s-SCBar-%d"), lpszProfileName,
        GetDlgCtrlID());

    pApp->WriteProfileInt(szSection, _T("sizeHorzCX"), m_szHorz.cx);
    pApp->WriteProfileInt(szSection, _T("sizeHorzCY"), m_szHorz.cy);

    pApp->WriteProfileInt(szSection, _T("sizeVertCX"), m_szVert.cx);
    pApp->WriteProfileInt(szSection, _T("sizeVertCY"), m_szVert.cy);

    pApp->WriteProfileInt(szSection, _T("sizeFloatCX"), m_szFloat.cx);
    pApp->WriteProfileInt(szSection, _T("sizeFloatCY"), m_szFloat.cy);
}

void CSizingControlBar::GlobalLoadState(LPCTSTR lpszProfileName)
{
    for (int i = 0; i < m_arrBars.GetSize(); i++)
        ((CSizingControlBar*) m_arrBars[i])->LoadState(lpszProfileName);
}

void CSizingControlBar::GlobalSaveState(LPCTSTR lpszProfileName)
{
    for (int i = 0; i < m_arrBars.GetSize(); i++)
        ((CSizingControlBar*) m_arrBars[i])->SaveState(lpszProfileName);
}

/////////////////////////////////////////////////////////////////////////
// CSCBButton

CSCBButton::CSCBButton()
{
    bRaised = FALSE;
    bPushed = FALSE;
}

void CSCBButton::Paint(CDC* pDC)
{
    CRect rc = GetRect();

    if (bPushed)
        pDC->Draw3dRect(rc, ::GetSysColor(COLOR_BTNSHADOW),
            ::GetSysColor(COLOR_BTNHIGHLIGHT));
    else
        if (bRaised)
            pDC->Draw3dRect(rc, ::GetSysColor(COLOR_BTNHIGHLIGHT),
                ::GetSysColor(COLOR_BTNSHADOW));

    COLORREF clrOldTextColor = pDC->GetTextColor();
    pDC->SetTextColor(::GetSysColor(COLOR_BTNTEXT));
    int nPrevBkMode = pDC->SetBkMode(TRANSPARENT);
    CFont font;
    int ppi = pDC->GetDeviceCaps(LOGPIXELSX);
    int pointsize = MulDiv(60, 96, ppi); // 6 points at 96 ppi
    font.CreatePointFont(pointsize, _T("Marlett"));
    CFont* oldfont = pDC->SelectObject(&font);

    pDC->TextOut(ptOrg.x + 2, ptOrg.y + 2, CString(_T("r"))); // x-like
    
    pDC->SelectObject(oldfont);
    pDC->SetBkMode(nPrevBkMode);
    pDC->SetTextColor(clrOldTextColor);
}