windows-nt-4.0/private/sdktools/vctools/ntmfc/src40/winctrl1.cpp

// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1995 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#ifndef _AFX_NO_OCC_SUPPORT
#include "occimpl.h"
#endif

#ifdef AFX_CORE4_SEG
#pragma code_seg(AFX_CORE4_SEG)
#endif

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

#define new DEBUG_NEW

/////////////////////////////////////////////////////////////////////////////
// CStatic

BOOL CStatic::Create(LPCTSTR lpszText, DWORD dwStyle,
		const RECT& rect, CWnd* pParentWnd, UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(_T("STATIC"), lpszText, dwStyle, rect, pParentWnd, nID);
}

CStatic::~CStatic()
{
	DestroyWindow();
}

/////////////////////////////////////////////////////////////////////////////
// CButton

BOOL CButton::Create(LPCTSTR lpszCaption, DWORD dwStyle,
		const RECT& rect, CWnd* pParentWnd, UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(_T("BUTTON"), lpszCaption, dwStyle, rect, pParentWnd, nID);
}

CButton::~CButton()
{
	DestroyWindow();
}

// Helper for radio buttons
int CWnd::GetCheckedRadioButton(int nIDFirstButton, int nIDLastButton)
{
	for (int nID = nIDFirstButton; nID <= nIDLastButton; nID++)
	{
		if (IsDlgButtonChecked(nID))
			return nID; // id that matched
	}
	return 0; // invalid ID
}

// Derived class is responsible for implementing all of these handlers
//   for owner/self draw controls
void CButton::DrawItem(LPDRAWITEMSTRUCT)
{
	ASSERT(FALSE);
}

BOOL CButton::OnChildNotify(UINT message, WPARAM wParam, LPARAM lParam,
	LRESULT* pResult)
{
	if (message != WM_DRAWITEM)
		return CWnd::OnChildNotify(message, wParam, lParam, pResult);

	ASSERT(pResult == NULL);       // no return value expected
	UNUSED(pResult); // unused in release builds
	DrawItem((LPDRAWITEMSTRUCT)lParam);
	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CListBox

BOOL CListBox::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd,
		UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(_T("LISTBOX"), NULL, dwStyle, rect, pParentWnd, nID);
}

CListBox::~CListBox()
{
	DestroyWindow();
}

// Derived class is responsible for implementing these handlers
//   for owner/self draw controls (except for the optional DeleteItem)
void CListBox::DrawItem(LPDRAWITEMSTRUCT)
	{ ASSERT(FALSE); }
void CListBox::MeasureItem(LPMEASUREITEMSTRUCT)
	{ ASSERT(FALSE); }
int CListBox::CompareItem(LPCOMPAREITEMSTRUCT)
	{ ASSERT(FALSE); return 0; }
void CListBox::DeleteItem(LPDELETEITEMSTRUCT)
	{ /* default to nothing */ }
int CListBox::VKeyToItem(UINT, UINT)
	{ return Default(); }
int CListBox::CharToItem(UINT, UINT)
	{ return Default(); }

BOOL CListBox::OnChildNotify(UINT message, WPARAM wParam, LPARAM lParam,
	LRESULT* pResult)
{
	switch (message)
	{
	case WM_DRAWITEM:
		ASSERT(pResult == NULL);       // no return value expected
		DrawItem((LPDRAWITEMSTRUCT)lParam);
		break;
	case WM_MEASUREITEM:
		ASSERT(pResult == NULL);       // no return value expected
		MeasureItem((LPMEASUREITEMSTRUCT)lParam);
		break;
	case WM_COMPAREITEM:
		ASSERT(pResult != NULL);       // return value expected
		*pResult = CompareItem((LPCOMPAREITEMSTRUCT)lParam);
		break;
	case WM_DELETEITEM:
		ASSERT(pResult == NULL);       // no return value expected
		DeleteItem((LPDELETEITEMSTRUCT)lParam);
		break;
	case WM_VKEYTOITEM:
		*pResult = VKeyToItem(LOWORD(wParam), HIWORD(wParam));
		break;
	case WM_CHARTOITEM:
		*pResult = CharToItem(LOWORD(wParam), HIWORD(wParam));
		break;
	default:
		return CWnd::OnChildNotify(message, wParam, lParam, pResult);
	}
	return TRUE;
}

void CListBox::GetText(int nIndex, CString& rString) const
{
	ASSERT(::IsWindow(m_hWnd));
	GetText(nIndex, rString.GetBufferSetLength(GetTextLen(nIndex)));
	rString.ReleaseBuffer();
}

#if (WINVER >= 0x400)
UINT CListBox::ItemFromPoint(CPoint pt, BOOL& bOutside) const
{
	ASSERT(::IsWindow(m_hWnd));
	DWORD dw = (DWORD)::SendMessage(m_hWnd, LB_ITEMFROMPOINT, 0, MAKELPARAM(pt.x, pt.y));
	bOutside = !!HIWORD(dw);
	return LOWORD(dw);
}
#endif
/////////////////////////////////////////////////////////////////////////////
// CComboBox

BOOL CComboBox::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd,
		UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(_T("COMBOBOX"), NULL, dwStyle, rect, pParentWnd, nID);
}

CComboBox::~CComboBox()
{
	DestroyWindow();
}

// Derived class is responsible for implementing these handlers
//   for owner/self draw controls (except for the optional DeleteItem)
void CComboBox::DrawItem(LPDRAWITEMSTRUCT)
	{ ASSERT(FALSE); }
void CComboBox::MeasureItem(LPMEASUREITEMSTRUCT)
	{ ASSERT(FALSE); }
int CComboBox::CompareItem(LPCOMPAREITEMSTRUCT)
	{ ASSERT(FALSE); return 0; }
void CComboBox::DeleteItem(LPDELETEITEMSTRUCT)
	{ /* default to nothing */ }

BOOL CComboBox::OnChildNotify(UINT message, WPARAM wParam, LPARAM lParam,
	LRESULT* pResult)
{
	switch (message)
	{
	case WM_DRAWITEM:
		ASSERT(pResult == NULL);       // no return value expected
		DrawItem((LPDRAWITEMSTRUCT)lParam);
		break;
	case WM_MEASUREITEM:
		ASSERT(pResult == NULL);       // no return value expected
		MeasureItem((LPMEASUREITEMSTRUCT)lParam);
		break;
	case WM_COMPAREITEM:
		ASSERT(pResult != NULL);       // return value expected
		*pResult = CompareItem((LPCOMPAREITEMSTRUCT)lParam);
		break;
	case WM_DELETEITEM:
		ASSERT(pResult == NULL);       // no return value expected
		DeleteItem((LPDELETEITEMSTRUCT)lParam);
		break;
	default:
		return CWnd::OnChildNotify(message, wParam, lParam, pResult);
	}
	return TRUE;
}

void CComboBox::GetLBText(int nIndex, CString& rString) const
{
	ASSERT(::IsWindow(m_hWnd));
	GetLBText(nIndex, rString.GetBufferSetLength(GetLBTextLen(nIndex)));
	rString.ReleaseBuffer();
}

/////////////////////////////////////////////////////////////////////////////
// CEdit

BOOL CEdit::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(_T("EDIT"), NULL, dwStyle, rect, pParentWnd, nID);
}

CEdit::~CEdit()
{
	DestroyWindow();
}

/////////////////////////////////////////////////////////////////////////////
// CScrollBar

BOOL CScrollBar::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd,
		UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(_T("SCROLLBAR"), NULL, dwStyle, rect, pParentWnd, nID);
}

CScrollBar::~CScrollBar()
{
	DestroyWindow();
}

/////////////////////////////////////////////////////////////////////////////
// Extra CWnd support for dynamic subclassing of controls

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

	// allow any other subclassing to occur
	PreSubclassWindow();

	// now hook into the AFX WndProc
	WNDPROC* lplpfn = GetSuperWndProcAddr();
	WNDPROC oldWndProc = (WNDPROC)::SetWindowLong(hWnd, GWL_WNDPROC,
		(DWORD)AfxGetAfxWndProc());
	ASSERT(oldWndProc != (WNDPROC)AfxGetAfxWndProc);

	if (*lplpfn == NULL)
		*lplpfn = oldWndProc;   // the first control of that type created
#ifdef _DEBUG
	else if (*lplpfn != oldWndProc)
	{
		TRACE0("Error: Trying to use SubclassWindow with incorrect CWnd\n");
		TRACE0("\tderived class.\n");
		TRACE3("\thWnd = $%04X (nIDC=$%04X) is not a %hs.\n", (UINT)hWnd,
			_AfxGetDlgCtrlID(hWnd), GetRuntimeClass()->m_lpszClassName);
		ASSERT(FALSE);
		// undo the subclassing if continuing after assert
		::SetWindowLong(hWnd, GWL_WNDPROC, (DWORD)oldWndProc);
	}
#endif

	return TRUE;
}

BOOL CWnd::SubclassDlgItem(UINT nID, CWnd* pParent)
{
	ASSERT(pParent != NULL);
	ASSERT(::IsWindow(pParent->m_hWnd));

	// check for normal dialog control first
	HWND hWndControl = ::GetDlgItem(pParent->m_hWnd, nID);
	if (hWndControl != NULL)
		return SubclassWindow(hWndControl);

#ifndef _AFX_NO_OCC_SUPPORT
	if (pParent->m_pCtrlCont != NULL)
	{
		// normal dialog control not found
		COleControlSite* pSite = pParent->m_pCtrlCont->FindItem(nID);
		if (pSite != NULL)
		{
			ASSERT(pSite->m_hWnd != NULL);
			VERIFY(SubclassWindow(pSite->m_hWnd));

#ifndef _AFX_NO_OCC_SUPPORT
			// If the control has reparented itself (e.g., invisible control),
			// make sure that the CWnd gets properly wired to its control site.
			if (pParent->m_hWnd != ::GetParent(pSite->m_hWnd))
				AttachControlSite(pParent);
#endif //!_AFX_NO_OCC_SUPPORT

			return TRUE;
		}
	}
#endif

	return FALSE;   // control not found
}

HWND CWnd::UnsubclassWindow()
{
	ASSERT(::IsWindow(m_hWnd));

	// set WNDPROC back to original value
	WNDPROC* lplpfn = GetSuperWndProcAddr();
	SetWindowLong(m_hWnd, GWL_WNDPROC, (LONG)*lplpfn);
	*lplpfn = NULL;

	// and Detach the HWND from the CWnd object
	return Detach();
}

#ifdef AFX_INIT_SEG
#pragma code_seg(AFX_INIT_SEG)
#endif

IMPLEMENT_DYNAMIC(CStatic, CWnd)
IMPLEMENT_DYNAMIC(CButton, CWnd)
IMPLEMENT_DYNAMIC(CListBox, CWnd)
IMPLEMENT_DYNAMIC(CComboBox, CWnd)
IMPLEMENT_DYNAMIC(CEdit, CWnd)
IMPLEMENT_DYNAMIC(CScrollBar, CWnd)

/////////////////////////////////////////////////////////////////////////////