C++ GetHmenu函数代码示例

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 (GetHmenu())
    {
        if ( !::AppendMenu(GetHmenu(), MF_POPUP | MF_STRING,
                           (UINT_PTR)submenu, title.t_str()) )
        {
            wxLogLastError(wxT("AppendMenu"));
        }

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

        if (IsAttached())
            Refresh();
    }

    return true;
}

wxMenu *wxMenuBar::Remove(size_t pos)
{
    wxMenu *menu = wxMenuBarBase::Remove(pos);
    if ( !menu )
        return NULL;

    if (GetHmenu())
    {
        if ( !::RemoveMenu(GetHmenu(), (UINT)MSWPositionForWxMenu(menu,pos), MF_BYPOSITION) )
        {
            wxLogLastError(wxT("RemoveMenu"));
        }

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

        if (IsAttached())
            Refresh();
    }

    return menu;
}

bool wxMenuBar::Insert(size_t pos, wxMenu *menu, const wxString& title)
{
    // Find out which MSW item before which we'll be inserting before
    // wxMenuBarBase::Insert is called and GetMenu(pos) is the new menu.
    // If IsAttached() is false this won't be used anyway
    bool isAttached =
        (GetHmenu() != 0);

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

    menu->wxMenuBase::SetTitle(title);

    if ( isAttached )
    {
        // We have a problem with the index if there is an extra "Window" menu
        // in this menu bar, which is added by wxMDIParentFrame to it directly
        // using Windows API (so that it remains invisible to the user code),
        // but which does affect the indices of the items we insert after it.
        // So we check if any of the menus before the insertion position is a
        // foreign one and adjust the insertion index accordingly.
        int mswExtra = 0;

        // Skip all this if the total number of menus matches (notice that the
        // internal menu count has already been incremented by wxMenuBarBase::
        // Insert() call above, hence -1).
        int mswCount = ::GetMenuItemCount(GetHmenu());
        if ( mswCount != -1 &&
                static_cast<unsigned>(mswCount) != GetMenuCount() - 1 )
        {
            wxMenuList::compatibility_iterator node = m_menus.GetFirst();
            for ( size_t n = 0; n < pos; n++ )
            {
                if ( ::GetSubMenu(GetHmenu(), n) != GetHmenuOf(node->GetData()) )
                    mswExtra++;
                else
                    node = node->GetNext();
            }
        }

        if ( !::InsertMenu(GetHmenu(), pos + mswExtra,
                           MF_BYPOSITION | MF_POPUP | MF_STRING,
                           (UINT_PTR)GetHmenuOf(menu), title.t_str()) )
        {
            wxLogLastError(wxT("InsertMenu"));
        }
#if wxUSE_ACCEL
        if ( menu->HasAccels() )
        {
            // need to rebuild accell table
            RebuildAccelTable();
        }
#endif // wxUSE_ACCEL

        if (IsAttached())
            Refresh();
    }

    return true;
}

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 wxMenu::SetTitle(const wxString& label)
{
    bool hasNoTitle = m_title.empty();
    m_title = label;

    HMENU hMenu = GetHmenu();

    if ( hasNoTitle )
    {
        if ( !label.empty() )
        {
            if ( !::InsertMenu(hMenu, 0u, MF_BYPOSITION | MF_STRING,
                               (UINT_PTR)idMenuTitle, m_title.t_str()) ||
                 !::InsertMenu(hMenu, 1u, MF_BYPOSITION, (unsigned)-1, NULL) )
            {
                wxLogLastError(wxT("InsertMenu"));
            }
        }
    }
    else
    {
        if ( label.empty() )
        {
            // remove the title and the separator after it
            if ( !RemoveMenu(hMenu, 0, MF_BYPOSITION) ||
                 !RemoveMenu(hMenu, 0, MF_BYPOSITION) )
            {
                wxLogLastError(wxT("RemoveMenu"));
            }
        }
        else
        {
            // modify the title
            if ( !ModifyMenu(hMenu, 0u,
                             MF_BYPOSITION | MF_STRING,
                             (UINT_PTR)idMenuTitle, m_title.t_str()) )
            {
                wxLogLastError(wxT("ModifyMenu"));
            }
        }
    }

    // put the title string in bold face
    if ( !m_title.empty() )
    {
        SetDefaultMenuItem(GetHmenu(), (UINT)idMenuTitle);
    }
}

bool wxMenu::MSWCommand(WXUINT WXUNUSED(param), WXWORD id_)
{
    const int id = (signed short)id_;

    // ignore commands from the menu title
    if ( id != idMenuTitle )
    {
        // Default value for uncheckable items.
        int checked = -1;

        // update the check item when it's clicked
        wxMenuItem * const item = FindItem(id);
        if ( item && item->IsCheckable() )
        {
            item->Toggle();

            // Get the status of the menu item: note that it has been just changed
            // by Toggle() above so here we already get the new state of the item.
            //
            // Also notice that we must pass unsigned id_ and not sign-extended id
            // to ::GetMenuState() as this is what it expects.
            UINT menuState = ::GetMenuState(GetHmenu(), id_, MF_BYCOMMAND);
            checked = (menuState & MF_CHECKED) != 0;
        }

        SendEvent(id, checked);
    }

    return true;
}

wxMenuItem* wxMenu::DoRemove(
  wxMenuItem*                       pItem
)
{
    //
    // We need to find the items position in the child list
    //
    size_t                          nPos;
    wxMenuItemList::compatibility_iterator node = GetMenuItems().GetFirst();

    for (nPos = 0; node; nPos++)
    {
        if (node->GetData() == pItem)
            break;
        node = node->GetNext();
    }

    //
    // DoRemove() (unlike Remove) can only be called for existing item!
    //
    wxCHECK_MSG(node, NULL, wxT("bug in wxMenu::Remove logic"));

#if wxUSE_ACCEL
    //
    // Remove the corresponding accel from the accel table
    //
    int                             n = FindAccel(pItem->GetId());

    if (n != wxNOT_FOUND)
    {
        delete m_vAccels[n];
        m_vAccels.RemoveAt(n);
    }

#endif // wxUSE_ACCEL
    //
    // Remove the item from the menu
    //
    ::WinSendMsg( GetHmenu()
                 ,MM_REMOVEITEM
                 ,MPFROM2SHORT(pItem->GetId(), TRUE)
                 ,(MPARAM)0
                );
    if (IsAttached() && GetMenuBar()->IsAttached())
    {
        //
        // Otherwise, the chane won't be visible
        //
        GetMenuBar()->Refresh();
    }

    //
    // And from internal data structures
    //
    return wxMenuBase::DoRemove(pItem);
} // end of wxMenu::DoRemove

wxMenu *wxMenuBar::Replace(size_t pos, wxMenu *menu, const wxString& title)
{
    wxMenu *menuOld = wxMenuBarBase::Replace(pos, menu, title);
    if ( !menuOld )
        return NULL;

    menu->wxMenuBase::SetTitle(title);

#if defined(WINCE_WITHOUT_COMMANDBAR)
    if (IsAttached())
#else
    if (GetHmenu())
#endif
    {
        int mswpos = MSWPositionForWxMenu(menuOld,pos);

        // can't use ModifyMenu() because it deletes the submenu it replaces
        if ( !::RemoveMenu(GetHmenu(), (UINT)mswpos, MF_BYPOSITION) )
        {
            wxLogLastError(wxT("RemoveMenu"));
        }

        if ( !::InsertMenu(GetHmenu(), (UINT)mswpos,
                           MF_BYPOSITION | MF_POPUP | MF_STRING,
                           (UINT_PTR)GetHmenuOf(menu), title.wx_str()) )
        {
            wxLogLastError(wxT("InsertMenu"));
        }

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

        if (IsAttached())
            Refresh();
    }

    return menuOld;
}

wxMenu *wxMenuBar::Remove(size_t pos)
{
    wxMenu *menu = wxMenuBarBase::Remove(pos);
    if ( !menu )
        return NULL;

#if defined(WINCE_WITHOUT_COMMANDBAR)
    if (IsAttached())
#else
    if (GetHmenu())
#endif
    {
#if defined(WINCE_WITHOUT_COMMANDBAR)
        if (GetToolBar())
        {
            if (!::SendMessage((HWND) GetToolBar()->GetHWND(), TB_DELETEBUTTON, (UINT) pos, (LPARAM) 0))
            {
                wxLogLastError(wxT("TB_DELETEBUTTON"));
            }
        }
#else
        if ( !::RemoveMenu(GetHmenu(), (UINT)MSWPositionForWxMenu(menu,pos), MF_BYPOSITION) )
        {
            wxLogLastError(wxT("RemoveMenu"));
        }
#endif

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

        if (IsAttached())
            Refresh();
    }

    m_titles.RemoveAt(pos);

    return menu;
}

wxMenu* wxMenuBar::Remove(
  size_t                            nPos
)
{
    wxMenu*                         pMenu = wxMenuBarBase::Remove(nPos);
    SHORT                           nId;

    if (!pMenu)
        return NULL;

    nId = SHORT1FROMMR(::WinSendMsg( (HWND)GetHmenu()
                                    ,MM_ITEMIDFROMPOSITION
                                    ,MPFROMSHORT(nPos)
                                    ,(MPARAM)0)
                                   );
    if (nId == MIT_ERROR)
    {
        wxLogLastError(wxT("LogLastError"));
        return NULL;
    }
    if (IsAttached())
    {
        ::WinSendMsg( (HWND)GetHmenu()
                     ,MM_REMOVEITEM
                     ,MPFROM2SHORT(nId, TRUE)
                     ,(MPARAM)0
                    );

#if wxUSE_ACCEL
        if (pMenu->HasAccels())
        {
            //
            // Need to rebuild accell table
            //
            RebuildAccelTable();
        }
#endif // wxUSE_ACCEL
        Refresh();
    }
    m_titles.RemoveAt(nPos);
    return pMenu;
} // end of wxMenuBar::Remove

wxMenuItem *wxMenu::DoRemove(wxMenuItem *item)
{
    // we need to find the item's position in the child list
    size_t pos;
    wxMenuItemList::compatibility_iterator node = GetMenuItems().GetFirst();
    for ( pos = 0; node; pos++ )
    {
        if ( node->GetData() == item )
            break;

        node = node->GetNext();
    }

#if wxUSE_ACCEL
    // remove the corresponding accel from the accel table
    int n = FindAccel(item->GetId());
    if ( n != wxNOT_FOUND )
    {
        delete m_accels[n];

        m_accels.RemoveAt(n);

#if wxUSE_OWNER_DRAWN
        ResetMaxAccelWidth();
#endif
    }
    //else: this item doesn't have an accel, nothing to do
#endif // wxUSE_ACCEL

    // Update indices of radio groups.
    if ( m_radioData )
    {
        bool inExistingGroup = m_radioData->UpdateOnRemoveItem(pos);

        wxASSERT_MSG( !inExistingGroup || item->GetKind() == wxITEM_RADIO,
                      wxT("Removing non radio button from radio group?") );
    }

    // remove the item from the menu
    if ( !::RemoveMenu(GetHmenu(), (UINT)pos, MF_BYPOSITION) )
    {
        wxLogLastError(wxT("RemoveMenu"));
    }

    if ( IsAttached() && GetMenuBar()->IsAttached() )
    {
        // otherwise, the change won't be visible
        GetMenuBar()->Refresh();
    }

    // and from internal data structures
    return wxMenuBase::DoRemove(item);
}

void wxMenu::SetTitle( const wxString& rLabel )
{
    bool bHasNoTitle = m_title.empty();
    HWND hMenu = GetHmenu();

    m_title = rLabel;
    if (bHasNoTitle)
    {
        if (!rLabel.empty())
        {
            if (!::WinSetWindowText(hMenu, rLabel.c_str()))
            {
                wxLogLastError(wxT("SetMenuTitle"));
            }
        }
    }
    else
    {
        if (rLabel.empty() )
        {
            ::WinSendMsg( GetHmenu()
                         ,MM_REMOVEITEM
                         ,MPFROM2SHORT(hMenu, TRUE)
                         ,(MPARAM)0
                        );
        }
        else
        {
            //
            // Modify the title
            //
            if (!::WinSetWindowText(hMenu, rLabel.c_str()))
            {
                wxLogLastError(wxT("SetMenuTitle"));
            }
        }
    }
} // end of wxMenu::SetTitle

wxMenuItem *wxMenu::DoRemove(wxMenuItem *item)
{
    // we need to find the item's position in the child list
    size_t pos;
    wxMenuItemList::compatibility_iterator node = GetMenuItems().GetFirst();
    for ( pos = 0; node; pos++ )
    {
        if ( node->GetData() == item )
            break;

        node = node->GetNext();
    }

    // DoRemove() (unlike Remove) can only be called for an existing item!
    wxCHECK_MSG( node, NULL, wxT("bug in wxMenu::Remove logic") );

#if wxUSE_ACCEL
    // remove the corresponding accel from the accel table
    int n = FindAccel(item->GetId());
    if ( n != wxNOT_FOUND )
    {
        delete m_accels[n];

        m_accels.RemoveAt(n);

#if wxUSE_OWNER_DRAWN
        ResetMaxAccelWidth();
#endif
    }
    //else: this item doesn't have an accel, nothing to do
#endif // wxUSE_ACCEL

    // remove the item from the menu
    if ( !::RemoveMenu(GetHmenu(), (UINT)pos, MF_BYPOSITION) )
    {
        wxLogLastError(wxT("RemoveMenu"));
    }

    if ( IsAttached() && GetMenuBar()->IsAttached() )
    {
        // otherwise, the change won't be visible
        GetMenuBar()->Refresh();
    }

    // and from internal data structures
    return wxMenuBase::DoRemove(item);
}

// The wxWindow destructor will take care of deleting the submenus.
wxMenu::~wxMenu()
{
    // we should free Windows resources only if Windows doesn't do it for us
    // which happens if we're attached to a menubar or a submenu of another
    // menu
    if ( !IsAttached() && !GetParent() )
    {
        if ( !::DestroyMenu(GetHmenu()) )
        {
            wxLogLastError(wxT("DestroyMenu"));
        }
    }

#if wxUSE_ACCEL
    // delete accels
    WX_CLEAR_ARRAY(m_accels);
#endif // wxUSE_ACCEL
}

bool wxMenu::OS2Command( WXUINT WXUNUSED(uParam),
                         WXWORD vId )
{
    //
    // Ignore commands from the menu title
    //

    if (vId != (WXWORD)idMenuTitle)
    {
        SendEvent( vId
                  ,(int)::WinSendMsg( GetHmenu()
                                     ,MM_QUERYITEMATTR
                                     ,MPFROMSHORT(vId)
                                     ,(MPARAM)MIA_CHECKED
                                    )
                 );
    }
    return true;
} // end of wxMenu::OS2Command