给对话框添加菜单和状态栏

From: http://hi.baidu.com/machh03/blog/item/f320a533fd1672fe1a4cfffe.html/cmtid/f3235f24ff89713a8644f950

 

最近做了个播放器，用到这方面的知识挺多， 总结一下：

1，添加菜单

有多种方法

（1：在resource View中选中对话框属性的 menu 属性

（2：CMenu    m_Menu;

       m_Menu.LoadMenu(IDR_MAIN_MENU);
        SetMenu(&m_Menu);

       取消菜单 SetMenu(NULL);

2，添加状态栏

在头文件添加 /** 状态栏*/
CStatusBar m_wndStatusBar;

  

。CPP文件中添加

/** 状态栏*/
if (!m_wndStatusBar.Create(this) ||
        !m_wndStatusBar.SetIndicators(indicators,sizeof(indicators)/sizeof(UINT))
        )
{
   TRACE0("Failed to create status bar\n");
   return -1;      // fail to create
}

3.WM_MENUSELECT消息

     这样手动添加的状态栏，无法接收WM_MENUSELECT消息，所以我们要自己添加

ON_WM_MENUSELECT()

响应的消息函数

/**
* 菜单栏选择
*/
void CFilePlayerDlg::OnMenuSelect(UINT nItemID, UINT nFlags, HMENU hSystemMenu)
{
CString sFileName;
if(nItemID == AFX_IDS_IDLEMESSAGE)
{
   sFileName = L"就绪";
   SendMessage(WM_SETMESSAGESTRING, (WPARAM)0, (LPARAM)(LPCTSTR)sFileName);
   return ;
}
if(nFlags & MF_SEPARATOR)
   return ;
if(nFlags & (MF_SYSMENU | MF_POPUP))
   return ;

CString   strStatusText;  
strStatusText.LoadString( nItemID);   

m_wndStatusBar.SetPaneText(0, strStatusText);//

// SendMessage(WM_SETMESSAGESTRING, (WPARAM)0, (LPARAM)(LPCTSTR)strStatusText);

return ;
}

这样就获得了菜单的提示内容，m_wndStatusBar.SetPaneText(0, strStatusText); //将菜单提示显示在状态栏第一个窗格。当然自己可以指定其它窗格，

如果用 SendMessage(WM_SETMESSAGESTRING, (WPARAM)0, (LPARAM)(LPCTSTR)strStatusText);

发送 WM_SETMESSAGESTRING消息也可实现，

需要自己添加该消息的响应函数

如下：

ON_MESSAGE(WM_SETMESSAGESTRING, OnSetMessageString) // 消息宏

消息处理函数

LRESULT CFilePlayerDlg::OnSetMessageString(WPARAM wParam, LPARAM lParam)
{
LPCTSTR lpsz = NULL;
CString strMessage;

if (lParam != 0)
{
   ASSERT(wParam == 0);    // can't have both an ID and a string
   lpsz = (LPCTSTR)lParam; // set an explicit string
}
else if (wParam != 0)
{
   {
    LPTSTR lpsz = strMessage.GetBuffer(255);
    if (AfxLoadString(wParam, lpsz) != 0)
    {
     lpsz = _tcschr(lpsz, _T('\n'));
     if (lpsz != NULL)
      *lpsz = '\0';
    }
    else
    {
      TRACE1("Warning: no message line prompt for ID 0x%04X.\n", wParam);
    }
    strMessage.ReleaseBuffer();  
   }
   lpsz = strMessage;
}
m_wndStatusBar.SetWindowText(lpsz);   //显示菜单提示
return 0L;
}

4. 这样手动给对话框添加菜单，不能响应菜单更新命令，没有OnInitMenuPopup（）函数，所以需要自己实现

   手动添加            ON_WM_INITMENUPOPUP() // 响应菜单命令更新消息

并添加相应的消息处理函数。

// 给对话框添加处理菜单命令消息的函数 命令更新
void CFilePlayerDlg::OnInitMenuPopup(CMenu *pPopupMenu, UINT nIndex,BOOL bSysMenu)
{
ASSERT(pPopupMenu != NULL);
// Check the enabled state of various menu items.

CCmdUI state;
state.m_pMenu = pPopupMenu;
ASSERT(state.m_pOther == NULL);
ASSERT(state.m_pParentMenu == NULL);

// Determine if menu is popup in top-level menu and set m_pOther to
// it if so (m_pParentMenu == NULL indicates that it is secondary popup).
HMENU hParentMenu;
if (AfxGetThreadState()->m_hTrackingMenu == pPopupMenu->m_hMenu)
   state.m_pParentMenu = pPopupMenu;    // Parent == child for tracking popup.
else if ((hParentMenu = ::GetMenu(m_hWnd)) != NULL)
{
   CWnd* pParent = this;
   // Child windows don't have menus--need to go to the top!
   if (pParent != NULL &&
    (hParentMenu = ::GetMenu(pParent->m_hWnd)) != NULL)
   {
    int nIndexMax = ::GetMenuItemCount(hParentMenu);
    for (int nIndex = 0; nIndex < nIndexMax; nIndex++)
    {
     if (::GetSubMenu(hParentMenu, nIndex) == pPopupMenu->m_hMenu)
     {
      // When popup is found, m_pParentMenu is containing menu.
      state.m_pParentMenu = CMenu::FromHandle(hParentMenu);
      break;
     }
    }
   }
}

state.m_nIndexMax = pPopupMenu->GetMenuItemCount();
for (state.m_nIndex = 0; state.m_nIndex < state.m_nIndexMax;
   state.m_nIndex++)
{
   state.m_nID = pPopupMenu->GetMenuItemID(state.m_nIndex);
   if (state.m_nID == 0)
    continue; // Menu separator or invalid cmd - ignore it.

   ASSERT(state.m_pOther == NULL);
   ASSERT(state.m_pMenu != NULL);
   if (state.m_nID == (UINT)-1)
   {
    // Possibly a popup menu, route to first item of that popup.
    state.m_pSubMenu = pPopupMenu->GetSubMenu(state.m_nIndex);
    if (state.m_pSubMenu == NULL ||
     (state.m_nID = state.m_pSubMenu->GetMenuItemID(0)) == 0 ||
     state.m_nID == (UINT)-1)
    {
     continue;       // First item of popup can't be routed to.
    }
    state.DoUpdate(this, TRUE);   // Popups are never auto disabled.
   }
   else
   {
    // Normal menu item.
    // Auto enable/disable if frame window has m_bAutoMenuEnable
    // set and command is _not_ a system command.
    state.m_pSubMenu = NULL;
    state.DoUpdate(this, FALSE);
   }

   // Adjust for menu deletions and additions.
   UINT nCount = pPopupMenu->GetMenuItemCount();
   if (nCount < state.m_nIndexMax)
   {
    state.m_nIndex -= (state.m_nIndexMax - nCount);
    while (state.m_nIndex < nCount &&
     pPopupMenu->GetMenuItemID(state.m_nIndex) == state.m_nID)
    {
     state.m_nIndex++;
    }
   }
   state.m_nIndexMax = nCount;
}
}