// need to handle both ANSI and UNICODE versions of the message TOOLTIPTEXTA* pTTTA = (TOOLTIPTEXTA*)pNMHDR; TOOLTIPTEXTW* pTTTW = (TOOLTIPTEXTW*)pNMHDR; TCHAR szFullText[256]; CString strTipText; UINT nID = pNMHDR->idFrom; if (pNMHDR->code == TTN_NEEDTEXTA && (pTTTA->uFlags & TTF_IDISHWND) || pNMHDR->code == TTN_NEEDTEXTW && (pTTTW->uFlags & TTF_IDISHWND)) { // idFrom is actually the HWND of the tool nID = ::GetDlgCtrlID((HWND)nID); } if(nID==ID_PAUSE) { strTipText=(m_bPause?"继续":"暂停"); SendMessage(WM_SETMESSAGESTRING, 0, (LPARAM)(LPCTSTR)strTipText); } else if (nID != 0) // will be zero on a separator { // don’t handle the message if no string resource found if (AfxLoadString(nID, szFullText) == 0) return FALSE;
// this is the command id, not the button index AfxExtractSubString(strTipText, szFullText, 1, ’n’); } #ifndef _UNICODE if (pNMHDR->code == TTN_NEEDTEXTA) lstrcpyn(pTTTA->szText, strTipText, _countof(pTTTA->szText)); else _mbstowcsz(pTTTW->szText, strTipText, _countof(pTTTW->szText)); #else if (pNMHDR->code == TTN_NEEDTEXTA) _wcstombsz(pTTTA->szText, strTipText, _countof(pTTTA->szText)); else lstrcpyn(pTTTW->szText, strTipText, _countof(pTTTW->szText)); #endif *pResult = 0;
// bring the tooltip window above other popup windows ::SetWindowPos(pNMHDR->hwndFrom, HWND_TOP, 0, 0, 0, 0, SWP_NOACTIVATE|SWP_NOSIZE|SWP_NOMOVE|SWP_NOOWNERZORDER); strTipText.Empty(); return TRUE; // message was handled }
在MFC中框架类CFrameWnd通过函数OnToolTipText处理工具提示,可在MFC的文件AFXWIN.H及WINFRM.CPP找到该函数的定义及实现。如果要动态改变工具提示,需要重载该函数。实际上MFC的CMDIChildWnd类就重载了该函数。
1、在MainFrm.h的DECLARE_MESSAGE_MAP()前添加函数的定义:
afx_msg BOOL OnToolTipText(UINT nID, NMHDR* pNMHDR, LRESULT* pResult);
2、在MainFrm.cpp的END_MESSAGE_MAP()前面添加消息映射:
ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTA, 0, 0xFFFF, OnToolTipText)
ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTW, 0, 0xFFFF, OnToolTipText)
3、在MainFrm.cpp中添加动态提示的实现代码:
假如对ID为ID_PAUSE的工具栏按钮实现动态提示,如下(红色部分)。其中SendMessage(WM_SETMESSAGESTRING, 0, (LPARAM)(LPCTSTR)strTipText)用来设置状态条的显示文本。
BOOL CMainFrame::OnToolTipText(UINT, NMHDR* pNMHDR, LRESULT* pResult)
{
ASSERT(pNMHDR->code == TTN_NEEDTEXTA || pNMHDR->code == TTN_NEEDTEXTW);
// need to handle both ANSI and UNICODE versions of the message
TOOLTIPTEXTA* pTTTA = (TOOLTIPTEXTA*)pNMHDR;
TOOLTIPTEXTW* pTTTW = (TOOLTIPTEXTW*)pNMHDR;
TCHAR szFullText[256];
CString strTipText;
UINT nID = pNMHDR->idFrom;
if (pNMHDR->code == TTN_NEEDTEXTA && (pTTTA->uFlags & TTF_IDISHWND) ||
pNMHDR->code == TTN_NEEDTEXTW && (pTTTW->uFlags & TTF_IDISHWND))
{
// idFrom is actually the HWND of the tool
nID = ::GetDlgCtrlID((HWND)nID);
}
if(nID==ID_PAUSE)
{
strTipText=(m_bPause?"继续":"暂停");
SendMessage(WM_SETMESSAGESTRING, 0, (LPARAM)(LPCTSTR)strTipText);
}
else if (nID != 0) // will be zero on a separator
{
// don’t handle the message if no string resource found
if (AfxLoadString(nID, szFullText) == 0)
return FALSE;
// this is the command id, not the button index
AfxExtractSubString(strTipText, szFullText, 1, ’n’);
}
#ifndef _UNICODE
if (pNMHDR->code == TTN_NEEDTEXTA)
lstrcpyn(pTTTA->szText, strTipText, _countof(pTTTA->szText));
else
_mbstowcsz(pTTTW->szText, strTipText, _countof(pTTTW->szText));
#else
if (pNMHDR->code == TTN_NEEDTEXTA)
_wcstombsz(pTTTA->szText, strTipText, _countof(pTTTA->szText));
else
lstrcpyn(pTTTW->szText, strTipText, _countof(pTTTW->szText));
#endif
*pResult = 0;
// bring the tooltip window above other popup windows
::SetWindowPos(pNMHDR->hwndFrom, HWND_TOP, 0, 0, 0, 0,
SWP_NOACTIVATE|SWP_NOSIZE|SWP_NOMOVE|SWP_NOOWNERZORDER);
strTipText.Empty();
return TRUE; // message was handled
}
wcscpy(pCaption5,L "hao ahaoa ");
TBBUTTONINFO tbinfo;
memset(&tbinfo,0,sizeof(TBBUTTONINFO));
tbinfo.cbSize=sizeof(TBBUTTONINFO);
tbinfo.dwMask=TBIF_TEXT|TBIF_COMMAND;
//tbinfo.idCommand=IDM_BTN2;
tbinfo.pszText=pCaption5;
::SendMessage(m_hWnd,TB_SETBUTTONINFO,IDM_BTN2,(LPARAM)&tbinfo);