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

}

void CSizingControlBar::OnCaptureChanged(CWnd *pWnd) 
{
    if (m_bTracking && (pWnd != this))
        StopTracking();

    baseCSizingControlBar::OnCaptureChanged(pWnd);
}

void CSizingControlBar::OnNcCalcSize(BOOL bCalcValidRects,
                                     NCCALCSIZE_PARAMS FAR* lpncsp) 
{
    // compute the the client area
    CRect rcClient = lpncsp->rgrc[0];
    rcClient.DeflateRect(5, 5);

    m_dwSCBStyle &= ~SCBS_EDGEALL;

    switch(m_nDockBarID)
    {
    case AFX_IDW_DOCKBAR_TOP:
        m_dwSCBStyle |= SCBS_EDGEBOTTOM;
        rcClient.DeflateRect(m_cyGripper, 0, 0, 0);
        break;
    case AFX_IDW_DOCKBAR_BOTTOM:
        m_dwSCBStyle |= SCBS_EDGETOP;
        rcClient.DeflateRect(m_cyGripper, 0, 0, 0);
        break;
    case AFX_IDW_DOCKBAR_LEFT:
        m_dwSCBStyle |= SCBS_EDGERIGHT;
        rcClient.DeflateRect(0, m_cyGripper, 0, 0);
        break;
    case AFX_IDW_DOCKBAR_RIGHT:
        m_dwSCBStyle |= SCBS_EDGELEFT;
        rcClient.DeflateRect(0, m_cyGripper, 0, 0);
        break;
    default:
        break;
    }

    if (!IsFloating() && m_pDockBar != NULL)
    {
        CSCBArray arrSCBars;
        GetRowSizingBars(arrSCBars);

        for (int i = 0; i < arrSCBars.GetSize(); i++)
            if (arrSCBars[i] == this)
            {
                if (i > 0)
                    m_dwSCBStyle |= IsHorzDocked() ?
                        SCBS_EDGELEFT : SCBS_EDGETOP;
                if (i < arrSCBars.GetSize() - 1)
                    m_dwSCBStyle |= IsHorzDocked() ?
                        SCBS_EDGERIGHT : SCBS_EDGEBOTTOM;
            }
    }

    // make room for edges only if they will be painted
    if (m_dwSCBStyle & SCBS_SHOWEDGES)
        rcClient.DeflateRect(
            (m_dwSCBStyle & SCBS_EDGELEFT) ? m_cxEdge : 0,
            (m_dwSCBStyle & SCBS_EDGETOP) ? m_cxEdge : 0,
            (m_dwSCBStyle & SCBS_EDGERIGHT) ? m_cxEdge : 0,
            (m_dwSCBStyle & SCBS_EDGEBOTTOM) ? m_cxEdge : 0);

    // "hide" button positioning
    CPoint ptOrgBtn;
    if (IsHorzDocked())
        ptOrgBtn = CPoint(rcClient.left - m_cyGripper - 1,
            rcClient.top - 1);
    else
        ptOrgBtn = CPoint(rcClient.right - 11,
            rcClient.top - m_cyGripper - 1);

    m_biHide.Move(ptOrgBtn - CRect(lpncsp->rgrc[0]).TopLeft());

    lpncsp->rgrc[0] = rcClient;
}

void CSizingControlBar::OnNcPaint() 
{
    // get window DC that is clipped to the non-client area
    CWindowDC dc(this);

    CRect rcClient, rcBar;
    GetClientRect(rcClient);
    ClientToScreen(rcClient);
    GetWindowRect(rcBar);
    rcClient.OffsetRect(-rcBar.TopLeft());
    rcBar.OffsetRect(-rcBar.TopLeft());

    // client area is not our bussiness :)
    dc.ExcludeClipRect(rcClient);

    // draw borders in non-client area
    CRect rcDraw = rcBar;
    DrawBorders(&dc, rcDraw);

    // erase parts not drawn
    dc.IntersectClipRect(rcDraw);

    // erase NC background the hard way
    HBRUSH hbr = (HBRUSH)GetClassLong(m_hWnd, GCL_HBRBACKGROUND);
    ::FillRect(dc.m_hDC, rcDraw, hbr);

    if (m_dwSCBStyle & SCBS_SHOWEDGES)
    {
        CRect rcEdge; // paint the sizing edges
        for (int i = 0; i < 4; i++)
            if (GetEdgeRect(rcBar, GetEdgeHTCode(i), rcEdge))
                dc.Draw3dRect(rcEdge, ::GetSysColor(COLOR_BTNHIGHLIGHT),
                    ::GetSysColor(COLOR_BTNSHADOW));
    }

    if (m_cyGripper && !IsFloating())
        NcPaintGripper(&dc, rcClient);

    ReleaseDC(&dc);
}

void CSizingControlBar::NcPaintGripper(CDC* pDC, CRect rcClient)
{
    // paints a simple "two raised lines" gripper
    // override this if you want a more sophisticated gripper
    CRect gripper = rcClient;
    CRect rcbtn = m_biHide.GetRect();
    BOOL bHorz = IsHorzDocked();
    
    gripper.DeflateRect(1, 1);
    if (bHorz)
    {   // gripper at left
        gripper.left -= m_cyGripper;
        gripper.right = gripper.left + 3;
        gripper.top = rcbtn.bottom + 3;
    }
    else
    {   // gripper at top
        gripper.top -= m_cyGripper;
        gripper.bottom = gripper.top + 3;
        gripper.right = rcbtn.left - 3;
    }

    pDC->Draw3dRect(gripper, ::GetSysColor(COLOR_BTNHIGHLIGHT),
        ::GetSysColor(COLOR_BTNSHADOW));

    gripper.OffsetRect(bHorz ? 3 : 0, bHorz ? 0 : 3);
    
    pDC->Draw3dRect(gripper, ::GetSysColor(COLOR_BTNHIGHLIGHT),
        ::GetSysColor(COLOR_BTNSHADOW));

    m_biHide.Paint(pDC);
}

void CSizingControlBar::OnPaint()
{
    // overridden to skip border painting based on clientrect
    CPaintDC dc(this);
}

UINT CSizingControlBar::OnNcHitTest(CPoint point)
{
    if (IsFloating())
        return baseCSizingControlBar::OnNcHitTest(point);

    CRect rcBar, rcEdge;
    GetWindowRect(rcBar);

    for (int i = 0; i < 4; i++)
        if (GetEdgeRect(rcBar, GetEdgeHTCode(i), rcEdge))
            if (rcEdge.PtInRect(point)) return GetEdgeHTCode(i);

    CRect rc = m_biHide.GetRect();
    rc.OffsetRect(rcBar.TopLeft());
    if (rc.PtInRect(point))
        return HTCLOSE;

    return HTCLIENT;
}

void CSizingControlBar::OnSettingChange(UINT uFlags, LPCTSTR lpszSection) 
{
    baseCSizingControlBar::OnSettingChange(uFlags, lpszSection);

    m_bDragShowContent = FALSE;
    ::SystemParametersInfo(SPI_GETDRAGFULLWINDOWS, 0,
        &m_bDragShowContent, 0); // update
}

/////////////////////////////////////////////////////////////////////////
// CSizingControlBar implementation helpers

void CSizingControlBar::StartTracking(UINT nHitTest)
{
    SetCapture();

    // make sure no updates are pending
    RedrawWindow(NULL, NULL, RDW_ALLCHILDREN | RDW_UPDATENOW);
    
    BOOL bHorz = IsHorzDocked();

    m_szOld = bHorz ? m_szHorz : m_szVert;

    CRect rc;
    GetWindowRect(&rc);
    CRect rcEdge;
    VERIFY(GetEdgeRect(rc, nHitTest, rcEdge));
    m_ptOld = rcEdge.CenterPoint();

    m_htEdge = nHitTest;
    m_bTracking = TRUE;

    CSCBArray arrSCBars;
    GetRowSizingBars(arrSCBars);

    // compute the minsize as the max minsize of the sizing bars on row
    m_szMinT = m_szMin;
    for (int i = 0; i < arrSCBars.GetSize(); i++)
        if (bHorz)
            m_szMinT.cy = max(m_szMinT.cy, arrSCBars[i]->m_szMin.cy);
        else
            m_szMinT.cx = max(m_szMinT.cx, arrSCBars[i]->m_szMin.cx);

    if (!IsSideTracking())
    {
        // the control bar cannot grow with more than the size of 
        // remaining client area of the mainframe
        m_pDockSite->RepositionBars(0, 0xFFFF, AFX_IDW_PANE_FIRST,
            reposQuery, &rc, NULL, TRUE);
        m_szMaxT = m_szOld + rc.Size() - CSize(4, 4);
    }
    else
    {
        // side tracking: max size is the actual size plus the amount
        // the neighbour bar can be decreased to reach its minsize
        for (int i = 0; i < arrSCBars.GetSize(); i++)
            if (arrSCBars[i] == this) break;

        CSizingControlBar* pBar = arrSCBars[i +
            ((m_htEdge == HTTOP || m_htEdge == HTLEFT) ? -1 : 1)];

        m_szMaxT = m_szOld + (bHorz ? pBar->m_szHorz :
            pBar->m_szVert) - pBar->m_szMin;
    }

    OnTrackInvertTracker(); // draw tracker
}

void CSizingControlBar::StopTracking()
{
    OnTrackInvertTracker(); // erase tracker

    m_bTracking = FALSE;
    ReleaseCapture();
    
    m_pDockSite->DelayRecalcLayout();
}

void CSizingControlBar::OnTrackUpdateSize(CPoint& point)
{
    ASSERT(!IsFloating());

    CPoint pt = point;
    ClientToScreen(&pt);
    CSize szDelta = pt - m_ptOld;

    CSize sizeNew = m_szOld;
    switch (m_htEdge)
    {
    case HTLEFT:    sizeNew -= CSize(szDelta.cx, 0); break;
    case HTTOP:     sizeNew -= CSize(0, szDelta.cy); break;
    case HTRIGHT:   sizeNew += CSize(szDelta.cx, 0); break;
    case HTBOTTOM:  sizeNew += CSize(0, szDelta.cy); break;
    }

    // enforce the limits
    sizeNew.cx = max(m_szMinT.cx, min(m_szMaxT.cx, sizeNew.cx));
    sizeNew.cy = max(m_szMinT.cy, min(m_szMaxT.cy, sizeNew.cy));

    BOOL bHorz = IsHorzDocked();
    szDelta = sizeNew - (bHorz ? m_szHorz : m_szVert);
    
    if (szDelta == CSize(0, 0)) return; // no size change

    OnTrackInvertTracker(); // erase tracker

    (bHorz ? m_szHorz : m_szVert) = sizeNew; // save the new size

    CSCBArray arrSCBars;
    GetRowSizingBars(arrSCBars);

    for (int i = 0; i < arrSCBars.GetSize(); i++)
        if (!IsSideTracking())
        {   // track simultaneously
            CSizingControlBar* pBar = arrSCBars[i];
            (bHorz ? pBar->m_szHorz.cy : pBar->m_szVert.cx) =
                bHorz ? sizeNew.cy : sizeNew.cx;
        }
        else
        {   // adjust the neighbour's size too
            if (arrSCBars[i] != this) continue;

            CSizingControlBar* pBar = arrSCBars[i +
                ((m_htEdge == HTTOP || m_htEdge == HTLEFT) ? -1 : 1)];

            (bHorz ? pBar->m_szHorz.cx : pBar->m_szVert.cy) -=
                bHorz ? szDelta.cx : szDelta.cy;
        }

    OnTrackInvertTracker(); // redraw tracker at new pos

    if (m_bDragShowContent)
        m_pDockSite->DelayRecalcLayout();
}

void CSizingControlBar::OnTrackInvertTracker()
{
    ASSERT(m_bTracking);

    if (m_bDragShowContent)
        return; // don't show tracker if DragFullWindows is on

    BOOL bHorz = IsHorzDocked();
    CRect rc, rcBar, rcDock, rcFrame;
    GetWindowRect(rcBar);
    m_pDockBar->GetWindowRect(rcDock);
    m_pDockSite->GetWindowRect(rcFrame);
    VERIFY(GetEdgeRect(rcBar, m_htEdge, rc));
    if (!IsSideTracking())
        rc = bHorz ? 
            CRect(rcDock.left + 1, rc.top, rcDock.right - 1, rc.bottom) :
            CRect(rc.left, rcDock.top + 1, rc.right, rcDock.bottom - 1);

    rc.OffsetRect(-rcFrame.TopLeft());

    CSize sizeNew = bHorz ? m_szHorz : m_szVert;
    CSize sizeDelta = sizeNew - m_szOld;
    if (m_nDockBarID == AFX_IDW_DOCKBAR_LEFT && m_htEdge == HTTOP ||
        m_nDockBarID == AFX_IDW_DOCKBAR_RIGHT && m_htEdge != HTBOTTOM ||
        m_nDockBarID == AFX_IDW_DOCKBAR_TOP && m_htEdge == HTLEFT ||
        m_nDockBarID == AFX_IDW_DOCKBAR_BOTTOM && m_htEdge != HTRIGHT)
        sizeDelta = -sizeDelta;
    rc.OffsetRect(sizeDelta);

    CDC *pDC = m_pDockSite->GetDCEx(NULL,
        DCX_WINDOW | DCX_CACHE | DCX_LOCKWINDOWUPDATE);
    CBrush* pBrush = CDC::GetHalftoneBrush();
    CBrush* pBrushOld = pDC->SelectObject(pBrush);

    pDC->PatBlt(rc.left, rc.top, rc.Width(), rc.Height(), PATINVERT);
    
    pDC->SelectObject(pBrushOld);
    m_pDockSite->ReleaseDC(pDC);
}