wincore.cpp

vc6.0完整版

		{
			CPoint point((DWORD)lParam);
			lResult = (this->*mmf.pfn_wp)(point);
		}
		break;

	case AfxSig_wv: // AfxSig_bv, AfxSig_wv
		lResult = (this->*mmf.pfn_wv)();
		break;

	case AfxSig_vCALC:
		(this->*mmf.pfn_vCALC)((BOOL)wParam, (NCCALCSIZE_PARAMS*)lParam);
		break;

	case AfxSig_vPOS:
		(this->*mmf.pfn_vPOS)((WINDOWPOS*)lParam);
		break;

	case AfxSig_vwwh:
		(this->*mmf.pfn_vwwh)(LOWORD(wParam), HIWORD(wParam), (HANDLE)lParam);
		break;

	case AfxSig_vwp:
		{
			CPoint point((DWORD)lParam);
			(this->*mmf.pfn_vwp)(wParam, point);
			break;
		}
	case AfxSig_vwSIZING:
		(this->*mmf.pfn_vwl)(wParam, lParam);
		lResult = TRUE;
		break;

	case AfxSig_bwsp:
		lResult = (this->*mmf.pfn_bwsp)(LOWORD(wParam), (short) HIWORD(wParam),
			CPoint(LOWORD(lParam), HIWORD(lParam)));
		if (!lResult)
			return FALSE;
	}
	goto LReturnTrue;

LDispatchRegistered:    // for registered windows messages
	ASSERT(message >= 0xC000);
	mmf.pfn = lpEntry->pfn;
	lResult = (this->*mmf.pfn_lwl)(wParam, lParam);

LReturnTrue:
	if (pResult != NULL)
		*pResult = lResult;
	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CTestCmdUI - used to test for disabled commands before dispatching

class CTestCmdUI : public CCmdUI
{
public:
	CTestCmdUI();

public: // re-implementations only
	virtual void Enable(BOOL bOn);
	virtual void SetCheck(int nCheck);
	virtual void SetRadio(BOOL bOn);
	virtual void SetText(LPCTSTR);

	BOOL m_bEnabled;
};

CTestCmdUI::CTestCmdUI()
{
	m_bEnabled = TRUE;  // assume it is enabled
}

void CTestCmdUI::Enable(BOOL bOn)
{
	m_bEnabled = bOn;
	m_bEnableChanged = TRUE;
}

void CTestCmdUI::SetCheck(int)
{
	// do nothing -- just want to know about calls to Enable
}

void CTestCmdUI::SetRadio(BOOL)
{
	// do nothing -- just want to know about calls to Enable
}

void CTestCmdUI::SetText(LPCTSTR)
{
	// do nothing -- just want to know about calls to Enable
}

/////////////////////////////////////////////////////////////////////////////
// CWnd command handling

BOOL CWnd::OnCommand(WPARAM wParam, LPARAM lParam)
	// return TRUE if command invocation was attempted
{
	UINT nID = LOWORD(wParam);
	HWND hWndCtrl = (HWND)lParam;
	int nCode = HIWORD(wParam);

	// default routing for command messages (through closure table)

	if (hWndCtrl == NULL)
	{
		// zero IDs for normal commands are not allowed
		if (nID == 0)
			return FALSE;

		// make sure command has not become disabled before routing
		CTestCmdUI state;
		state.m_nID = nID;
		OnCmdMsg(nID, CN_UPDATE_COMMAND_UI, &state, NULL);
		if (!state.m_bEnabled)
		{
			TRACE1("Warning: not executing disabled command %d\n", nID);
			return TRUE;
		}

		// menu or accelerator
		nCode = CN_COMMAND;
	}
	else
	{
		// control notification
		ASSERT(nID == 0 || ::IsWindow(hWndCtrl));

		if (_afxThreadState->m_hLockoutNotifyWindow == m_hWnd)
			return TRUE;        // locked out - ignore control notification

		// reflect notification to child window control
		if (ReflectLastMsg(hWndCtrl))
			return TRUE;    // eaten by child

		// zero IDs for normal commands are not allowed
		if (nID == 0)
			return FALSE;
	}

#ifdef _DEBUG
	if (nCode < 0 && nCode != (int)0x8000)
		TRACE1("Implementation Warning: control notification = $%X.\n",
			nCode);
#endif

	return OnCmdMsg(nID, nCode, NULL, NULL);
}

BOOL CWnd::OnNotify(WPARAM, LPARAM lParam, LRESULT* pResult)
{
	ASSERT(pResult != NULL);
	NMHDR* pNMHDR = (NMHDR*)lParam;
	HWND hWndCtrl = pNMHDR->hwndFrom;

	// get the child ID from the window itself
	UINT nID = _AfxGetDlgCtrlID(hWndCtrl);
	int nCode = pNMHDR->code;

	ASSERT(hWndCtrl != NULL);
	ASSERT(::IsWindow(hWndCtrl));

	if (_afxThreadState->m_hLockoutNotifyWindow == m_hWnd)
		return TRUE;        // locked out - ignore control notification

	// reflect notification to child window control
	if (ReflectLastMsg(hWndCtrl, pResult))
		return TRUE;        // eaten by child

	AFX_NOTIFY notify;
	notify.pResult = pResult;
	notify.pNMHDR = pNMHDR;
	return OnCmdMsg(nID, MAKELONG(nCode, WM_NOTIFY), &notify, NULL);
}

/////////////////////////////////////////////////////////////////////////////
// CWnd extensions

CFrameWnd* CWnd::GetParentFrame() const
{
	if (GetSafeHwnd() == NULL) // no Window attached
		return NULL;

	ASSERT_VALID(this);

	CWnd* pParentWnd = GetParent();  // start with one parent up
	while (pParentWnd != NULL)
	{
		if (pParentWnd->IsFrameWnd())
			return (CFrameWnd*)pParentWnd;
		pParentWnd = pParentWnd->GetParent();
	}
	return NULL;
}

HWND AFXAPI AfxGetParentOwner(HWND hWnd)
{
	// check for permanent-owned window first
	CWnd* pWnd = CWnd::FromHandlePermanent(hWnd);
	if (pWnd != NULL)
		return pWnd->GetOwner()->GetSafeHwnd();

	// otherwise, return parent in the Windows sense
	return (::GetWindowLong(hWnd, GWL_STYLE) & WS_CHILD) ?
		::GetParent(hWnd) : ::GetWindow(hWnd, GW_OWNER);
}

CWnd* CWnd::GetTopLevelParent() const
{
	if (GetSafeHwnd() == NULL) // no Window attached
		return NULL;

	ASSERT_VALID(this);

	HWND hWndParent = m_hWnd;
	HWND hWndT;
	while ((hWndT = AfxGetParentOwner(hWndParent)) != NULL)
		hWndParent = hWndT;

	return CWnd::FromHandle(hWndParent);
}

CWnd* CWnd::GetTopLevelOwner() const
{
	if (GetSafeHwnd() == NULL) // no Window attached
		return NULL;

	ASSERT_VALID(this);

	HWND hWndOwner = m_hWnd;
	HWND hWndT;
	while ((hWndT = ::GetWindow(hWndOwner, GW_OWNER)) != NULL)
		hWndOwner = hWndT;

	return CWnd::FromHandle(hWndOwner);
}

CWnd* CWnd::GetParentOwner() const
{
	if (GetSafeHwnd() == NULL) // no Window attached
		return NULL;

	ASSERT_VALID(this);

	HWND hWndParent = m_hWnd;
	HWND hWndT;
	while ((::GetWindowLong(hWndParent, GWL_STYLE) & WS_CHILD) &&
		(hWndT = ::GetParent(hWndParent)) != NULL)
	{
		hWndParent = hWndT;
	}

	return CWnd::FromHandle(hWndParent);
}

BOOL CWnd::IsTopParentActive() const
{
	ASSERT(m_hWnd != NULL);
	ASSERT_VALID(this);

	return CWnd::GetForegroundWindow() ==
		GetTopLevelParent()->GetLastActivePopup();
}

void CWnd::ActivateTopParent()
{
	// special activate logic for floating toolbars and palettes
	CWnd* pTopLevel = GetTopLevelParent();
	CWnd* pActiveWnd = GetForegroundWindow();
	if (pActiveWnd == NULL ||
		!(pActiveWnd->m_hWnd == m_hWnd || ::IsChild(pActiveWnd->m_hWnd, m_hWnd)))
	{
		// clicking on floating frame when it does not have
		// focus itself -- activate the toplevel frame instead.
		pTopLevel->SetForegroundWindow();
	}
}

CFrameWnd* CWnd::GetTopLevelFrame() const
{
	if (GetSafeHwnd() == NULL) // no Window attached
		return NULL;

	ASSERT_VALID(this);

	CFrameWnd* pFrameWnd = (CFrameWnd*)this;
	if (!IsFrameWnd())
		pFrameWnd = GetParentFrame();

	if (pFrameWnd != NULL)
	{
		CFrameWnd* pTemp;
		while ((pTemp = pFrameWnd->GetParentFrame()) != NULL)
			pFrameWnd = pTemp;
	}
	return pFrameWnd;
}

CWnd* PASCAL CWnd::GetSafeOwner(CWnd* pParent, HWND* pWndTop)
{
	HWND hWnd = GetSafeOwner_(pParent->GetSafeHwnd(), pWndTop);
	return CWnd::FromHandle(hWnd);
}

int CWnd::MessageBox(LPCTSTR lpszText, LPCTSTR lpszCaption, UINT nType)
{
	if (lpszCaption == NULL)
		lpszCaption = AfxGetAppName();
	int nResult = ::MessageBox(GetSafeHwnd(), lpszText, lpszCaption, nType);
	return nResult;
}

CWnd* PASCAL CWnd::GetDescendantWindow(HWND hWnd, int nID, BOOL bOnlyPerm)
{
	// GetDlgItem recursive (return first found)
	// breadth-first for 1 level, then depth-first for next level

	// use GetDlgItem since it is a fast USER function
	HWND hWndChild;
	CWnd* pWndChild;
	if ((hWndChild = ::GetDlgItem(hWnd, nID)) != NULL)
	{
		if (::GetTopWindow(hWndChild) != NULL)
		{
			// children with the same ID as their parent have priority
			pWndChild = GetDescendantWindow(hWndChild, nID, bOnlyPerm);
			if (pWndChild != NULL)
				return pWndChild;
		}
		// return temporary handle if allowed
		if (!bOnlyPerm)
			return CWnd::FromHandle(hWndChild);

		// return only permanent handle
		pWndChild = CWnd::FromHandlePermanent(hWndChild);
		if (pWndChild != NULL)
			return pWndChild;
	}

	// walk each child
	for (hWndChild = ::GetTopWindow(hWnd); hWndChild != NULL;
		hWndChild = ::GetNextWindow(hWndChild, GW_HWNDNEXT))
	{
		pWndChild = GetDescendantWindow(hWndChild, nID, bOnlyPerm);
		if (pWndChild != NULL)
			return pWndChild;
	}
	return NULL;    // not found
}

void PASCAL CWnd::SendMessageToDescendants(HWND hWnd, UINT message,
	WPARAM wParam, LPARAM lParam, BOOL bDeep, BOOL bOnlyPerm)
{
	// walk through HWNDs to avoid creating temporary CWnd objects
	// unless we need to call this function recursively
	for (HWND hWndChild = ::GetTopWindow(hWnd); hWndChild != NULL;
		hWndChild = ::GetNextWindow(hWndChild, GW_HWNDNEXT))
	{
		// if bOnlyPerm is TRUE, don't send to non-permanent windows
		if (bOnlyPerm)
		{
			CWnd* pWnd = CWnd::FromHandlePermanent(hWndChild);
			if (pWnd != NULL)
			{
				// call window proc directly since it is a C++ window
				AfxCallWndProc(pWnd, pWnd->m_hWnd, message, wParam, lParam);
			}
		}
		else
		{
			// send message with Windows SendMessage API
			::SendMessage(hWndChild, message, wParam, lParam);
		}
		if (bDeep && ::GetTopWindow(hWndChild) != NULL)
		{
			// send to child windows after parent
			SendMessageToDescendants(hWndChild, message, wParam, lParam,
				bDeep, bOnlyPerm);
		}
	}
}

/////////////////////////////////////////////////////////////////////////////
// Scroll bar helpers
//  hook for CWnd functions
//    only works for derived class (eg: CView) that override 'GetScrollBarCtrl'
// if the window doesn't have a _visible_ windows scrollbar - then
//   look for a sibling with the appropriate ID

CScrollBar* CWnd::GetScrollBarCtrl(int) const
{
	return NULL;        // no special scrollers supported
}

int CWnd::SetScrollPos(int nBar, int nPos, BOOL bRedraw)
{
	CScrollBar* pScrollBar;
	if ((pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
		return pScrollBar->SetScrollPos(nPos, bRedraw);
	else
		return ::SetScrollPos(m_hWnd, nBar, nPos, bRedraw);
}

int CWnd::GetScrollPos(int nBar) const
{
	CScrollBar* pScrollBar;
	if ((pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
		return pScrollBar->GetScrollPos();
	else
		return ::GetScrollPos(m_hWnd, nBar);
}

void CWnd::SetScrollRange(int nBar, int nMinPos, int nMaxPos, BOOL bRedraw)
{
	CScrollBar* pScrollBar;
	if ((pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
		pScrollBar->SetScrollRange(nMinPos, nMaxPos, bRedraw);
	else
		::SetScrollRange(m_hWnd, nBar, nMinPos, nMaxPos, bRedraw);
}

void CWnd::GetScrollRange(int nBar, LPINT lpMinPos, LPINT lpMaxPos) const
{
	CScrollBar* pScrollBar;
	if ((pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
		pScrollBar->GetScrollRange(lpMinPos, lpMaxPos);
	else
		::GetScrollRange(m_hWnd, nBar, lpMinPos, lpMaxPos);
}

// Turn on/off non-control scrollbars
//   for WS_?SCROLL scrollbars - show/hide them
//   for control scrollbar - enable/disable them
void CWnd::EnableScrollBarCtrl(int nBar, BOOL bEnable)
{
	CScrollBar* pScrollBar;
	if (nBar == SB_BOTH)
	{
		EnableScrollBarCtrl(SB_HORZ, bEnable);
		EnableScrollBarCtrl(SB_VERT, bEnable);
	}
	else if ((pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
	{
		// control scrollbar - enable or disable
		pScrollBar->EnableWindow(bEnable);
	}
	else
	{
		// WS_?SCROLL scrollbar - show or hide
		ShowScrollBar(nBar, bEnable);
	}
}

BOOL CWnd::SetScrollInfo(int nBar, LPSCROLLINFO lpScrollInfo, BOOL bRedraw)
{
	ASSERT(lpScrollInfo != NULL);
	if (afxData.nWinVer < 0x333)
		return FALSE;

	HWND hWnd = m_hWnd;
	CScrollBar* pScrollBar;
	if (nBar != SB_CTL && (pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
	{
		hWnd = pScrollBar->m_hWnd;
		nBar = SB_CTL;
	}
	lpScrollInfo->cbSize = sizeof(*lpScrollInfo);
	::SetScrollInfo(hWnd, nBar, lpScrollInfo, bRedraw);
	return TRUE;
}

BOOL CWnd::GetScrollInfo(int nBar, LPSCROLLINFO lpScrollInfo, UINT nMask)
{
	ASSERT(lpScrollInfo != NULL);
	if (afxData.nWinVer < 0x333)
		return FALSE;

	HWND hWnd = m_hWnd;
	CScrollBar* pScrollBar;
	if (nBar != SB_CTL && (pScrollBar = GetScrollBarCtrl(nBar)) != NULL)
	{
		hWnd = pScrol