C++ GetMenuCount函数代码示例

void wxMenuBar::RebuildAccelTable()
{
    //
    // Merge the accelerators of all menus into one accel table
    //
    size_t                          nAccelCount = 0;
    size_t                          i;
    size_t                          nCount = GetMenuCount();
    wxMenuList::iterator it;
    for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)
    {
        nAccelCount += (*it)->GetAccelCount();
    }

    if (nAccelCount)
    {
        wxAcceleratorEntry*         pAccelEntries = new wxAcceleratorEntry[nAccelCount];

        nAccelCount = 0;
        for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)
        {
            nAccelCount += (*it)->CopyAccels(&pAccelEntries[nAccelCount]);
        }
        m_vAccelTable = wxAcceleratorTable( nAccelCount
                                           ,pAccelEntries
                                          );
        delete [] pAccelEntries;
    }
} // end of wxMenuBar::RebuildAccelTable

// Destroy menubar, but keep data structures intact so we can recreate it.
bool wxMenuBar::DestroyMenuBar()
{
    if (!m_mainWidget)
    {
        SetMenuBarFrame(NULL);
        return false;
    }

    XtUnmanageChild ((Widget) m_mainWidget);
    XtUnrealizeWidget ((Widget) m_mainWidget);

    size_t menuCount = GetMenuCount();
    for (size_t i = 0; i < menuCount; i++)
    {
        wxMenu *menu = GetMenu(i);
        menu->DestroyMenu(true);

    }
    XtDestroyWidget((Widget) m_mainWidget);
    m_mainWidget = (WXWidget) 0;

    SetMenuBarFrame(NULL);

    return true;
}

void wxMenuBar::RebuildAccelTable()
{
    // merge the accelerators of all menus into one accel table
    size_t nAccelCount = 0;
    size_t i, count = GetMenuCount();
    wxMenuList::iterator it;
    for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )
    {
        nAccelCount += (*it)->GetAccelCount();
    }

    if ( nAccelCount )
    {
        wxAcceleratorEntry *accelEntries = new wxAcceleratorEntry[nAccelCount];

        nAccelCount = 0;
        for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )
        {
            nAccelCount += (*it)->CopyAccels(&accelEntries[nAccelCount]);
        }

        SetAcceleratorTable(wxAcceleratorTable(nAccelCount, accelEntries));

        delete [] accelEntries;
    }
    else // No (more) accelerators.
    {
        SetAcceleratorTable(wxAcceleratorTable());
    }
}

int wxMenuBar::MSWPositionForWxMenu(wxMenu *menu, int wxpos)
{
    wxASSERT(menu);
    wxASSERT(menu->GetHMenu());
    wxASSERT(m_hMenu);

#if defined(__WXWINCE__)
    int totalMSWItems = GetMenuCount();
#else
    int totalMSWItems = GetMenuItemCount((HMENU)m_hMenu);
#endif

    int i; // For old C++ compatibility
    for(i=wxpos; i<totalMSWItems; i++)
    {
        if(GetSubMenu((HMENU)m_hMenu,i)==(HMENU)menu->GetHMenu())
            return i;
    }
    for(i=0; i<wxpos; i++)
    {
        if(GetSubMenu((HMENU)m_hMenu,i)==(HMENU)menu->GetHMenu())
            return i;
    }
    wxFAIL;
    return -1;
}

// Gets the original label at the top-level of the menubar
wxString wxMenuBar::GetMenuLabel(size_t pos) const
{
    wxCHECK_MSG( pos < GetMenuCount(), wxEmptyString,
                 wxT("invalid menu index in wxMenuBar::GetMenuLabel") );

    return m_titles[pos];
}

bool wxMenuBar::Append(wxMenu *menu, const wxString& title)
{
    WXHMENU submenu = menu ? menu->GetHMenu() : 0;
    wxCHECK_MSG( submenu, false, wxT("can't append invalid menu to menubar") );

    if ( !wxMenuBarBase::Append(menu, title) )
        return false;

    menu->wxMenuBase::SetTitle(title);

#if defined(WINCE_WITHOUT_COMMANDBAR)
    if (IsAttached())
#else
    if (GetHmenu())
#endif
    {
#if defined(WINCE_WITHOUT_COMMANDBAR)
        if (!GetToolBar())
            return false;
        TBBUTTON tbButton;
        memset(&tbButton, 0, sizeof(TBBUTTON));
        tbButton.iBitmap = I_IMAGENONE;
        tbButton.fsState = TBSTATE_ENABLED;
        tbButton.fsStyle = TBSTYLE_DROPDOWN | TBSTYLE_NO_DROPDOWN_ARROW | TBSTYLE_AUTOSIZE;

        size_t pos = GetMenuCount();
        HMENU hPopupMenu = (HMENU) menu->GetHMenu() ;
        tbButton.dwData = (DWORD)hPopupMenu;
        wxString label = wxStripMenuCodes(title);
        tbButton.iString = (int) label.wx_str();

        tbButton.idCommand = NewControlId();
        if (!::SendMessage((HWND) GetToolBar()->GetHWND(), TB_INSERTBUTTON, pos, (LPARAM)&tbButton))
        {
            wxLogLastError(wxT("TB_INSERTBUTTON"));
            return false;
        }
#else
        if ( !::AppendMenu(GetHmenu(), MF_POPUP | MF_STRING,
                           (UINT_PTR)submenu, title.wx_str()) )
        {
            wxLogLastError(wxT("AppendMenu"));
        }
#endif

#if wxUSE_ACCEL
        if ( menu->HasAccels() )
        {
            // need to rebuild accelerator table
            RebuildAccelTable();
        }
#endif // wxUSE_ACCEL

        if (IsAttached())
            Refresh();
    }

    return true;
}

void wxMenuBar::RebuildAccelTable()
{
    //
    // Merge the accelerators of all menus into one accel table
    //
    size_t                          nAccelCount = 0;
    size_t                          i;
    size_t                          nCount = GetMenuCount();
    wxMenuList::iterator it;
#if defined(__INTEL_COMPILER) && 1 // VDM auto patch
#   pragma ivdep
#   pragma swp
#   pragma unroll
#endif
#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */
#   pragma ivdep
#   pragma swp
#   pragma unroll
#   pragma prefetch
#   if 0
#       pragma simd noassert
#   endif
#endif /* VDM auto patch */
    for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)
    {
        nAccelCount += (*it)->GetAccelCount();
    }

    if (nAccelCount)
    {
        wxAcceleratorEntry*         pAccelEntries = new wxAcceleratorEntry[nAccelCount];

        nAccelCount = 0;
#if defined(__INTEL_COMPILER) && 1 // VDM auto patch
#   pragma ivdep
#   pragma swp
#   pragma unroll
#endif
#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */
#   pragma ivdep
#   pragma swp
#   pragma unroll
#   pragma prefetch
#   if 0
#       pragma simd noassert
#   endif
#endif /* VDM auto patch */
        for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)
        {
            nAccelCount += (*it)->CopyAccels(&pAccelEntries[nAccelCount]);
        }
        m_vAccelTable = wxAcceleratorTable( nAccelCount
                                           ,pAccelEntries
                                          );
        delete [] pAccelEntries;
    }
} // end of wxMenuBar::RebuildAccelTable

bool wxMenuBar::Enable(bool enable)
{
    wxCHECK_MSG( IsAttached(), false, wxT("doesn't work with unattached menubars") );

    size_t i;
    for (i = 0; i < GetMenuCount(); i++)
        EnableTop(i, enable);

    return true;
}

void wxMenuBarBase::UpdateMenus()
{
    wxMenu* menu;
    int nCount = GetMenuCount();
    for (int n = 0; n < nCount; n++)
    {
        menu = GetMenu( n );
        if (menu != NULL)
            menu->UpdateUI( NULL );
    }
}

int wxMenuBar::MSWGetTopMenuPos(WXHMENU hMenu) const
{
    for ( size_t n = 0 ; n < GetMenuCount(); ++n )
    {
        wxMenu* menu = GetMenu(n)->MSWGetMenu(hMenu);
        if ( menu )
            return n;
    }

    return wxNOT_FOUND;
}

// Create menubar
bool wxMenuBar::CreateMenuBar(wxFrame* parent)
{
    m_parent = parent; // bleach... override it!
    PreCreation();
    m_parent = NULL;

    if (m_mainWidget)
    {
        XtVaSetValues((Widget) parent->GetMainWidget(), XmNmenuBar, (Widget) m_mainWidget, NULL);
        /*
        if (!XtIsManaged((Widget) m_mainWidget))
        XtManageChild((Widget) m_mainWidget);
        */
        XtMapWidget((Widget) m_mainWidget);
        return true;
    }

    Widget menuBarW = XmCreateMenuBar ((Widget) parent->GetMainWidget(),
                                       wxMOTIF_STR("MenuBar"), NULL, 0);
    m_mainWidget = (WXWidget) menuBarW;

    size_t menuCount = GetMenuCount();
    for (size_t i = 0; i < menuCount; i++)
    {
        wxMenu *menu = GetMenu(i);
        wxString title(m_titles[i]);
        menu->SetButtonWidget(menu->CreateMenu (this, menuBarW, menu, i, title, true));

        if (strcmp (wxStripMenuCodes(title), "Help") == 0)
            XtVaSetValues ((Widget) menuBarW, XmNmenuHelpWidget, (Widget) menu->GetButtonWidget(), NULL);

        // tear off menu support
#if (XmVersion >= 1002)
        if ( menu->IsTearOff() )
        {
            XtVaSetValues(GetWidget(menu),
                          XmNtearOffModel, XmTEAR_OFF_ENABLED,
                          NULL);
            Widget tearOff = XmGetTearOffControl(GetWidget(menu));
            wxDoChangeForegroundColour((Widget) tearOff, m_foregroundColour);
            wxDoChangeBackgroundColour((Widget) tearOff, m_backgroundColour, true);
        }
#endif
    }

    PostCreation();

    XtVaSetValues((Widget) parent->GetMainWidget(), XmNmenuBar, (Widget) m_mainWidget, NULL);
    XtRealizeWidget ((Widget) menuBarW);
    XtManageChild ((Widget) menuBarW);
    SetMenuBarFrame(parent);

    return true;
}

bool wxMenuBar::SetFont(const wxFont& font)
{
    m_font = font;
    ChangeFont();

    size_t menuCount = GetMenuCount();
    for (size_t i = 0; i < menuCount; i++)
        m_menus.Item(i)->GetData()->SetFont(font);

    return true;
}

void wxMenuBar::EnableTop(size_t pos, bool enable)
{
    wxCHECK_RET( IsAttached(), wxT("doesn't work with unattached menubars") );
    wxCHECK_RET( pos < GetMenuCount(), wxT("invalid menu index") );

    int flag = enable ? MF_ENABLED : MF_GRAYED;

    EnableMenuItem((HMENU)m_hMenu, MSWPositionForWxMenu(GetMenu(pos),pos), MF_BYPOSITION | flag);

    Refresh();
}

const wxMenuInfoHelperList& wxMenuBarBase::GetMenuInfos() const
{
    wxMenuInfoHelperList* list = const_cast< wxMenuInfoHelperList* > (& m_menuInfos);
    WX_CLEAR_LIST( wxMenuInfoHelperList, *list);
    for (size_t i = 0 ; i < GetMenuCount(); ++i)
    {
        wxMenuInfoHelper* info = new wxMenuInfoHelper();
        info->Create( GetMenu(i), GetMenuLabel(i));
        list->Append(info);
    }
    return m_menuInfos;
}

wxMenuItem *wxMenuBar::FindItem(int id, wxMenu **itemMenu) const
{
    if ( itemMenu )
        *itemMenu = NULL;

    wxMenuItem *item = NULL;
    size_t count = GetMenuCount();
    for ( size_t i = 0; !item && (i < count); i++ )
        item = _wxMenuAt(m_menus, i)->FindItem(id, itemMenu);

    return item;
}