atlgroupedit.h

这是一本学习 window编程的很好的参考教材

// Copyright (c) Iuri Apollonio 1998
// Use & modify as you want & need, and leave those 4 lines.
// Strongly based on article "Inplace edit control" of Mario Contestabile and "Editable subitems" of Zafir
// http://www.codeguru.com
//
// =============================================================================
//
// Port to ATL/WTL Rashid Thadha 01/03/2001
//
// =============================================================================

#if !defined(ATL_GROUPEDIT_H__)
#define ATL_GROUPEDIT_H__

#include "atloutbarctrl.h"

class CGroupEdit :	public CWindowImpl<CGroupEdit, CEdit>			                   
{
// Construction
public:
	CGroupEdit()
  {
	  bEscapeKey = FALSE;
	  iIndex = -1;
	  msgSend = NM_OB_ONGROUPENDEDIT;
	  bNoDown = FALSE;
  }
	
	BEGIN_MSG_MAP(CGroupEdit)
	  MESSAGE_HANDLER(WM_KILLFOCUS, OnKillFocus)
	  MESSAGE_HANDLER(WM_CHAR, OnChar)
	  REFLECT_NOTIFICATIONS()
	END_MSG_MAP()

// Attributes
public:
	BOOL	bEscapeKey;
	CString text;
	WPARAM	msgSend;
	BOOL	bNoDown;

  int iIndex;
	virtual ~CGroupEdit()
  {
  }

  LRESULT OnKillFocus(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
	  PostMessage(WM_CLOSE, 0, 0);
	  if (!bEscapeKey)
	  {
		  TCHAR cValue[1000];
		  GetWindowText(cValue, sizeof(cValue));
      text = cValue;
      CWindow wnd(GetParent());
		  if (text != "") 
        wnd.SendMessage(WM_OUTBAR_NOTIFY, msgSend, (LPARAM) this);
	  }
		return 0;
	}

  LRESULT OnChar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
    UINT nChar = (UINT)wParam;

	  if (nChar == VK_RETURN)
	  {
		  PostMessage(WM_CLOSE, 0, 0);
		  return 0;
	  }
	  else if (nChar == VK_ESCAPE)
	  {
		  PostMessage(WM_CLOSE, 0, 0);
      bEscapeKey = TRUE;
		  return 0;
	  }	  

    if (msgSend == NM_OB_ONGROUPENDEDIT)
	  {
		  bHandled = FALSE;
		  return 0;
	  }

	  // why do you need this ??
    if (nChar == VK_ESCAPE || nChar == VK_RETURN)
	  {
		  if (nChar == VK_ESCAPE) bEscapeKey = TRUE;
		  CWindow wnd(GetParent());
      wnd.SetFocus();
		  bHandled = TRUE;
		  return 0;
	  }

    CWindow wnd(GetParent());
	  CString str;
	  CRect rect, parentrect;
	  GetClientRect(&rect);
	  wnd.GetClientRect(&parentrect);
	  ClientToScreen(&rect);
	  wnd.ScreenToClient(&rect);
		TCHAR cValue[1000];
		GetWindowText(cValue, sizeof(cValue));
	  str = cValue;
	  CWindowDC dc(m_hWnd);
	  HFONT pFont = wnd.GetFont();
	  HFONT pFontDC = dc.SelectFont(pFont);
	  CRect szrc(rect);
	  szrc.bottom = szrc.top;

	  if (bNoDown == TRUE)
	  {
		  dc.DrawText(str, -1, szrc, DT_CALCRECT);
		  if (szrc.right >= parentrect.right - 1) rect.right = parentrect.right - 1;
		  else rect.right = szrc.right;
		  MoveWindow(&rect);
		  bHandled = FALSE;
		  return 0;
	  }

	  dc.DrawText(str, -1, szrc, DT_WORDBREAK|DT_CENTER|DT_CALCRECT);
	  dc.SelectFont(pFontDC);
	  CSize size = szrc.Size();

	  if (size.cx > rect.Width())
	  {
		  if (size.cx + rect.left < parentrect.right) rect.right = rect.left + size.cx;
		  else rect.right = parentrect.right;
		  MoveWindow(&rect);
	  }
	  else if (size.cy > rect.Height())
	  {
		  if (size.cy + rect.bottom < parentrect.bottom) rect.bottom = rect.top + size.cy;
		  else rect.bottom = parentrect.bottom;
		  MoveWindow(&rect);
	  }
		
    bHandled = FALSE;
		return 0;
	}
};


#endif //ATL_GROUPEDIT_H__