listcelledit.cpp

C语言LIST类实例应用总结

// ListCellEdit.cpp : implementation file
//

#include "stdafx.h"
#include "ClassList.h"
#include "ListCellEdit.h"

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

/////////////////////////////////////////////////////////////////////////////
// CListCellEdit

CListCellEdit::	CListCellEdit(int nItem, int nSubItem, CString strInitText)
:m_bEscape (FALSE)
{
    m_nItem = nItem;
    m_nSubItem = nSubItem;
    m_strInitText = strInitText;
}

CListCellEdit::~CListCellEdit()
{
}


BEGIN_MESSAGE_MAP(CListCellEdit, CEdit)
	//{{AFX_MSG_MAP(CListCellEdit)
	ON_WM_KILLFOCUS()
	ON_WM_NCDESTROY()
	ON_WM_CHAR()
	ON_WM_CREATE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CListCellEdit message handlers

void CListCellEdit::OnKillFocus(CWnd* pNewWnd) 
{
	CEdit::OnKillFocus(pNewWnd);
	
	// TODO: Add your message handler code here
	SetListItemText();

    DestroyWindow();
}

void CListCellEdit::OnNcDestroy() 
{
	CEdit::OnNcDestroy();
	
	// TODO: Add your message handler code here
    delete this;
}

BOOL CListCellEdit::PreTranslateMessage(MSG* pMsg) 
{
	// TODO: Add your specialized code here and/or call the base class
	if( pMsg->message == WM_KEYDOWN )
	{
		if(pMsg->wParam == VK_RETURN
			|| pMsg->wParam == VK_DELETE
			|| pMsg->wParam == VK_ESCAPE
			|| GetKeyState( VK_CONTROL)
			)
		{
			::TranslateMessage(pMsg);
			::DispatchMessage(pMsg);
			return TRUE;		    	// DO NOT process further
		}
	}
	
	return CEdit::PreTranslateMessage(pMsg);
}

void CListCellEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default
	if( nChar == VK_ESCAPE || nChar == VK_RETURN)
	{
		if( nChar == VK_ESCAPE )
			m_bEscape = TRUE;
		GetParent()->SetFocus();

		return;
	}

	// Resize edit control if needed
	// Get text extent
	CString str;

	GetWindowText( str );
	CWindowDC dc(this);
	CFont *pFont = GetParent()->GetFont();
	CFont *pFontDC = dc.SelectObject( pFont );
	CSize size = dc.GetTextExtent( str );
	dc.SelectObject( pFontDC );
	size.cx += 5;			   	// add some extra buffer

	// Get client rect
	CRect rect, parentrect;
	GetClientRect( &rect );
	GetParent()->GetClientRect( &parentrect );

	// Transform rect to parent coordinates
	ClientToScreen( &rect );
	GetParent()->ScreenToClient( &rect );

	// Check whether control needs to be resized
	// and whether there is space to grow
	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 );
	}
	
	CEdit::OnChar(nChar, nRepCnt, nFlags);
}

int CListCellEdit::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CEdit::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// Set the proper font
	CFont* font = GetParent()->GetFont();
	SetFont(font);

	SetWindowText( m_strInitText );
	SetFocus();
	SetSel( 0, -1 );
	
	return 0;
}

void CListCellEdit::SetListItemText()
{
    CString Text;
    GetWindowText (Text);

    // Send Notification to parent of ListView ctrl
    LV_DISPINFO dispinfo;
    dispinfo.hdr.hwndFrom = GetParent()->m_hWnd;
    dispinfo.hdr.idFrom = GetDlgCtrlID();
    dispinfo.hdr.code = LVN_ENDLABELEDIT;

    dispinfo.item.mask = LVIF_TEXT;
    dispinfo.item.iItem = m_nItem;
    dispinfo.item.iSubItem = m_nSubItem;
    dispinfo.item.pszText = m_bEscape ? NULL : LPTSTR ((LPCTSTR) Text);
    dispinfo.item.cchTextMax = Text.GetLength();

    GetParent()->GetParent()->SendMessage (WM_NOTIFY, GetParent()->GetDlgCtrlID(), (LPARAM) &dispinfo);
}