sizecbar.cpp

本程序源码是为日本一家地震监测机构编写的

/////////////////////////////////////////////////////////////////////////
// Copyright (C) 1998, 1999 by Cristi Posea
// All rights reserved
//
// Use and distribute freely, except: don't remove my name from the
// source or documentation (don't take credit for my work), mark your
// changes (don't get me blamed for your possible bugs), don't alter
// or remove this notice.
// No warrantee of any kind, express or implied, is included with this
// software; use at your own risk, responsibility for damages (if any) to
// anyone resulting from the use of this software rests entirely with the
// user.
//
// This class is intended to be used as a base class. Do not simply add
// your code to this file - instead create a new class derived from
// CSizingControlBar and put there what you need.
// Modify this file only to fix bugs, and don't forget to send me a copy.
//
// Send bug reports, bug fixes, enhancements, requests, flames, etc.,
// and I'll try to keep a version up to date.  I can be reached at:
//    [e-mail]
//
// More details at MFC Programmer's SourceBook
// http://www.codeguru.com/docking/docking_window.shtml or search
// www.codeguru.com for my name if the article was moved.
//
/////////////////////////////////////////////////////////////////////////
//
// Acknowledgements:
//  o   Thanks to Harlan R. Seymour ([e-mail]) for his continuous
//      support during development of this code.
//  o   Thanks to Dundas Software for the opportunity to test this code
//      on real-life applications.
//      If you don't know who they are, visit them at www.dundas.com .
//      Their award winning components and development suites are
//      a pile of gold.
//  o   Thanks to Chris Maunder ([e-mail]) who came with the
//      simplest way to query "Show window content while dragging" system
//      setting.
//  o   Thanks to Zafir Anjum ([e-mail]) for publishing this
//      code on his cool site (www.codeguru.com).
//  o   Some ideas for the gripper came from the CToolBarEx flat toolbar
//      by Joerg Koenig ([e-mail]). Also he inspired
//      me on writing this notice:) . Thanks, Joerg!
//  o   Thanks to Jakawan Ratiwanich ([e-mail]) and to
//      Udo Schaefer ([e-mail]) for the dwStyle bug fix under
//      VC++ 6.0.
//  o   And, of course, many thanks to all of you who used this code,
//      for the invaluable feedback I received.
//      
/////////////////////////////////////////////////////////////////////////


// sizecbar.cpp : implementation file
//

#include "stdafx.h"
#include "sizecbar.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////
// CSizingControlBar

CSCBArray CSizingControlBar::m_arrBars; // static member

IMPLEMENT_DYNAMIC(CSizingControlBar, baseCSizingControlBar);

CSizingControlBar::CSizingControlBar()
{
    m_szMin = CSize(33, 32);
    m_szHorz = CSize(200, 200);
    m_szVert = CSize(200, 200);
    m_szFloat = CSize(200, 200);
    m_bTracking = FALSE;
    m_bKeepSize = FALSE;
    m_bParentSizing = FALSE;
    m_cxEdge = 5;
    m_bDragShowContent = FALSE;
    m_nDockBarID = 0;
    m_dwSCBStyle = 0;
}

CSizingControlBar::~CSizingControlBar()
{
}

BEGIN_MESSAGE_MAP(CSizingControlBar, baseCSizingControlBar)
    //{{AFX_MSG_MAP(CSizingControlBar)
    ON_WM_CREATE()
    ON_WM_PAINT()
    ON_WM_NCPAINT()
    ON_WM_NCCALCSIZE()
    ON_WM_WINDOWPOSCHANGING()
    ON_WM_CAPTURECHANGED()
    ON_WM_SETTINGCHANGE()
    ON_WM_LBUTTONUP()
    ON_WM_MOUSEMOVE()
    ON_WM_NCLBUTTONDOWN()
    ON_WM_LBUTTONDOWN()
    ON_WM_LBUTTONDBLCLK()
    ON_WM_RBUTTONDOWN()
    ON_WM_NCLBUTTONUP()
    ON_WM_NCMOUSEMOVE()
    ON_WM_NCHITTEST()
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

BOOL CSizingControlBar::Create(LPCTSTR lpszWindowName, CWnd* pParentWnd,
                               CSize sizeDefault, BOOL bHasGripper,
                               UINT nID, DWORD dwStyle)
{
    // must have a parent
    ASSERT_VALID(pParentWnd);
    // cannot be both fixed and dynamic
    // (CBRS_SIZE_DYNAMIC is used for resizng when floating)
    ASSERT (!((dwStyle & CBRS_SIZE_FIXED) &&
              (dwStyle & CBRS_SIZE_DYNAMIC)));

    m_dwStyle = dwStyle & CBRS_ALL; // save the control bar styles

    m_szHorz = sizeDefault; // set the size members
    m_szVert = sizeDefault;
    m_szFloat = sizeDefault;

    m_cyGripper = bHasGripper ? 12 : 0; // set the gripper width

    // register and create the window - skip CControlBar::Create()
    CString wndclass = ::AfxRegisterWndClass(CS_DBLCLKS,
        ::LoadCursor(NULL, IDC_ARROW),
        ::GetSysColorBrush(COLOR_BTNFACE), 0);

    dwStyle &= ~CBRS_ALL; // keep only the generic window styles
    dwStyle |= WS_CLIPCHILDREN; // prevents flashing
    if (!CWnd::Create(wndclass, lpszWindowName, dwStyle,
        CRect(0, 0, 0, 0), pParentWnd, nID))
        return FALSE;

    return TRUE;
}

/////////////////////////////////////////////////////////////////////////
// CSizingControlBar message handlers

int CSizingControlBar::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
    if (baseCSizingControlBar::OnCreate(lpCreateStruct) == -1)
        return -1;
    
    // querry SPI_GETDRAGFULLWINDOWS system parameter
    // OnSettingChange() will update m_bDragShowContent
    m_bDragShowContent = FALSE;
    ::SystemParametersInfo(SPI_GETDRAGFULLWINDOWS, 0,
        &m_bDragShowContent, 0);

    m_arrBars.Add(this);        // register
    
//    m_dwSCBStyle |= SCBS_SHOWEDGES;

    return 0;
}

BOOL CSizingControlBar::DestroyWindow() 
{
    int nPos = FindSizingBar(this);
    ASSERT(nPos >= 0);

    m_arrBars.RemoveAt(nPos);   // unregister

    return baseCSizingControlBar::DestroyWindow();
}

const BOOL CSizingControlBar::IsFloating() const
{
    return !IsHorzDocked() && !IsVertDocked();
}

const BOOL CSizingControlBar::IsHorzDocked() const
{
    return (m_nDockBarID == AFX_IDW_DOCKBAR_TOP ||
        m_nDockBarID == AFX_IDW_DOCKBAR_BOTTOM);
}

const BOOL CSizingControlBar::IsVertDocked() const
{
    return (m_nDockBarID == AFX_IDW_DOCKBAR_LEFT ||
        m_nDockBarID == AFX_IDW_DOCKBAR_RIGHT);
}

const BOOL CSizingControlBar::IsSideTracking() const
{
    // don't call this when not tracking
    ASSERT(m_bTracking && !IsFloating());

    return (m_htEdge == HTLEFT || m_htEdge == HTRIGHT) ?
        IsHorzDocked() : IsVertDocked();
}

CSize CSizingControlBar::CalcFixedLayout(BOOL bStretch, BOOL bHorz)
{
    if (bStretch) // the bar is stretched (is not the child of a dockbar)
        if (bHorz)
            return CSize(32767, m_szHorz.cy);
        else
            return CSize(m_szVert.cx, 32767);

    // dirty cast - using CSCBDockBar to access protected CDockBar members
    CSCBDockBar* pDockBar = (CSCBDockBar*) m_pDockBar;

    // force imediate RecalcDelayShow() for all sizing bars on the row
    // with delayShow/delayHide flags set to avoid IsVisible() problems
    CSCBArray arrSCBars;
    GetRowSizingBars(arrSCBars);
    AFX_SIZEPARENTPARAMS layout;
    layout.hDWP = pDockBar->m_bLayoutQuery ?
        NULL : ::BeginDeferWindowPos(arrSCBars.GetSize());
    for (int i = 0; i < arrSCBars.GetSize(); i++)
        arrSCBars[i]->RecalcDelayShow(&layout);
    if (layout.hDWP != NULL)
        ::EndDeferWindowPos(layout.hDWP);

    // get available length
    CRect rc = pDockBar->m_rectLayout;
    if (rc.IsRectEmpty())
        m_pDockSite->GetClientRect(&rc);
    int nLengthAvail = bHorz ? rc.Width() + 2 : rc.Height() - 2;

    if (IsVisible() && !IsFloating() &&
        m_bParentSizing && arrSCBars[0] == this)
        if (NegociateSpace(nLengthAvail, (bHorz != FALSE)))
            AlignControlBars();

    m_bParentSizing = FALSE;
    
    CSize szRet = bHorz ? m_szHorz : m_szVert;
    szRet.cx = max(m_szMin.cx, szRet.cx);
    szRet.cy = max(m_szMin.cy, szRet.cy);

    return szRet;
}

CSize CSizingControlBar::CalcDynamicLayout(int nLength, DWORD dwMode)
{
    if (dwMode & (LM_HORZDOCK | LM_VERTDOCK)) // docked ?
    {
        if (nLength == -1)
            m_bParentSizing = TRUE;

        return baseCSizingControlBar::CalcDynamicLayout(nLength, dwMode);
    }

    if (dwMode & LM_MRUWIDTH) return m_szFloat;
    if (dwMode & LM_COMMIT) return m_szFloat; // already committed

    ((dwMode & LM_LENGTHY) ? m_szFloat.cy : m_szFloat.cx) = nLength;

    m_szFloat.cx = max(m_szFloat.cx, m_szMin.cx);
    m_szFloat.cy = max(m_szFloat.cy, m_szMin.cy);

    return m_szFloat;
}

void CSizingControlBar::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos)
{
    // force non-client recalc if moved or resized
    lpwndpos->flags |= SWP_FRAMECHANGED;

    baseCSizingControlBar::OnWindowPosChanging(lpwndpos);

    // find on which side are we docked
    UINT nOldDockBarID = m_nDockBarID;
    m_nDockBarID = GetParent()->GetDlgCtrlID();

    if (!IsFloating())
        if (lpwndpos->flags & SWP_SHOWWINDOW)
            m_bKeepSize = TRUE;
}

/////////////////////////////////////////////////////////////////////////
// Mouse Handling
//
void CSizingControlBar::OnLButtonDown(UINT nFlags, CPoint point) 
{
    if (m_pDockBar != NULL)
    {
        // start the drag
        ASSERT(m_pDockContext != NULL);
        ClientToScreen(&point);
        m_pDockContext->StartDrag(point);
    }
    else
        CWnd::OnLButtonDown(nFlags, point);
}

void CSizingControlBar::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
    if (m_pDockBar != NULL)
    {
        // toggle docking
        ASSERT(m_pDockContext != NULL);
        m_pDockContext->ToggleDocking();
    }
    else
        CWnd::OnLButtonDblClk(nFlags, point);
}

void CSizingControlBar::OnNcLButtonDown(UINT nHitTest, CPoint point) 
{
    if (IsFloating())
    {
        baseCSizingControlBar::OnNcLButtonDown(nHitTest, point);
        return;
    }

    if (m_bTracking) return;

    if ((nHitTest >= HTSIZEFIRST) && (nHitTest <= HTSIZELAST))
        StartTracking(nHitTest); // sizing edge hit
}

void CSizingControlBar::OnNcLButtonUp(UINT nHitTest, CPoint point) 
{
    if (nHitTest == HTCLOSE)
        m_pDockSite->ShowControlBar(this, FALSE, FALSE); // hide

    baseCSizingControlBar::OnNcLButtonUp(nHitTest, point);
}

void CSizingControlBar::OnLButtonUp(UINT nFlags, CPoint point) 
{
    if (m_bTracking)
        StopTracking();

    baseCSizingControlBar::OnLButtonUp(nFlags, point);
}

void CSizingControlBar::OnRButtonDown(UINT nFlags, CPoint point) 
{
    if (m_bTracking)
        StopTracking();
    
    baseCSizingControlBar::OnRButtonDown(nFlags, point);
}

void CSizingControlBar::OnMouseMove(UINT nFlags, CPoint point) 
{
    if (m_bTracking)
        OnTrackUpdateSize(point);
    
    baseCSizingControlBar::OnMouseMove(nFlags, point);