menucmn.cpp

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            default:
                if ( wxIsalnum(code) )
                {
                    text << (wxChar)code;

                    break;
                }

                wxFAIL_MSG( wxT("unknown keyboard accel") );
        }
    }

    SetText(text);
}

#endif // wxUSE_ACCEL

bool wxMenuBase::ms_locked = true;

// ----------------------------------------------------------------------------
// wxMenu ctor and dtor
// ----------------------------------------------------------------------------

void wxMenuBase::Init(long style)
{
    m_menuBar = (wxMenuBar *)NULL;
    m_menuParent = (wxMenu *)NULL;

    m_invokingWindow = (wxWindow *)NULL;
    m_style = style;
    m_clientData = (void *)NULL;
    m_eventHandler = this;
}

wxMenuBase::~wxMenuBase()
{
    WX_CLEAR_LIST(wxMenuItemList, m_items);

    // Actually, in GTK, the submenus have to get deleted first.
}

// ----------------------------------------------------------------------------
// wxMenu item adding/removing
// ----------------------------------------------------------------------------

void wxMenuBase::AddSubMenu(wxMenu *submenu)
{
    wxCHECK_RET( submenu, _T("can't add a NULL submenu") );

    submenu->SetParent((wxMenu *)this);
}

wxMenuItem* wxMenuBase::DoAppend(wxMenuItem *item)
{
    wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Append()") );

    m_items.Append(item);
    item->SetMenu((wxMenu*)this);
    if ( item->IsSubMenu() )
    {
        AddSubMenu(item->GetSubMenu());
    }

    return item;
}

wxMenuItem* wxMenuBase::Insert(size_t pos, wxMenuItem *item)
{
    wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Insert") );

    if ( pos == GetMenuItemCount() )
    {
        return DoAppend(item);
    }
    else
    {
        wxCHECK_MSG( pos < GetMenuItemCount(), NULL,
                     wxT("invalid index in wxMenu::Insert") );

        return DoInsert(pos, item);
    }
}

wxMenuItem* wxMenuBase::DoInsert(size_t pos, wxMenuItem *item)
{
    wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Insert()") );

    wxMenuItemList::compatibility_iterator node = m_items.Item(pos);
    wxCHECK_MSG( node, NULL, wxT("invalid index in wxMenu::Insert()") );

    m_items.Insert(node, item);
    item->SetMenu((wxMenu*)this);
    if ( item->IsSubMenu() )
    {
        AddSubMenu(item->GetSubMenu());
    }

    return item;
}

wxMenuItem *wxMenuBase::Remove(wxMenuItem *item)
{
    wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Remove") );

    return DoRemove(item);
}

wxMenuItem *wxMenuBase::DoRemove(wxMenuItem *item)
{
    wxMenuItemList::compatibility_iterator node = m_items.Find(item);

    // if we get here, the item is valid or one of Remove() functions is broken
    wxCHECK_MSG( node, NULL, wxT("bug in wxMenu::Remove logic") );

    // we detach the item, but we do delete the list node (i.e. don't call
    // DetachNode() here!)
    m_items.Erase(node);

    // item isn't attached to anything any more
    item->SetMenu((wxMenu *)NULL);
    wxMenu *submenu = item->GetSubMenu();
    if ( submenu )
    {
        submenu->SetParent((wxMenu *)NULL);
        if ( submenu->IsAttached() )
            submenu->Detach();
    }

    return item;
}

bool wxMenuBase::Delete(wxMenuItem *item)
{
    wxCHECK_MSG( item, false, wxT("invalid item in wxMenu::Delete") );

    return DoDelete(item);
}

bool wxMenuBase::DoDelete(wxMenuItem *item)
{
    wxMenuItem *item2 = DoRemove(item);
    wxCHECK_MSG( item2, false, wxT("failed to delete menu item") );

    // don't delete the submenu
    item2->SetSubMenu((wxMenu *)NULL);

    delete item2;

    return true;
}

bool wxMenuBase::Destroy(wxMenuItem *item)
{
    wxCHECK_MSG( item, false, wxT("invalid item in wxMenu::Destroy") );

    return DoDestroy(item);
}

bool wxMenuBase::DoDestroy(wxMenuItem *item)
{
    wxMenuItem *item2 = DoRemove(item);
    wxCHECK_MSG( item2, false, wxT("failed to delete menu item") );

    delete item2;

    return true;
}

// ----------------------------------------------------------------------------
// wxMenu searching for items
// ----------------------------------------------------------------------------

// Finds the item id matching the given string, wxNOT_FOUND if not found.
int wxMenuBase::FindItem(const wxString& text) const
{
    wxString label = wxMenuItem::GetLabelFromText(text);
    for ( wxMenuItemList::compatibility_iterator node = m_items.GetFirst();
          node;
          node = node->GetNext() )
    {
        wxMenuItem *item = node->GetData();
        if ( item->IsSubMenu() )
        {
            int rc = item->GetSubMenu()->FindItem(label);
            if ( rc != wxNOT_FOUND )
                return rc;
        }

        // we execute this code for submenus as well to alllow finding them by
        // name just like the ordinary items
        if ( !item->IsSeparator() )
        {
            if ( item->GetLabel() == label )
                return item->GetId();
        }
    }

    return wxNOT_FOUND;
}

// recursive search for item by id
wxMenuItem *wxMenuBase::FindItem(int itemId, wxMenu **itemMenu) const
{
    if ( itemMenu )
        *itemMenu = NULL;

    wxMenuItem *item = NULL;
    for ( wxMenuItemList::compatibility_iterator node = m_items.GetFirst();
          node && !item;
          node = node->GetNext() )
    {
        item = node->GetData();

        if ( item->GetId() == itemId )
        {
            if ( itemMenu )
                *itemMenu = (wxMenu *)this;
        }
        else if ( item->IsSubMenu() )
        {
            item = item->GetSubMenu()->FindItem(itemId, itemMenu);
        }
        else
        {
            // don't exit the loop
            item = NULL;
        }
    }

    return item;
}

// non recursive search
wxMenuItem *wxMenuBase::FindChildItem(int id, size_t *ppos) const
{
    wxMenuItem *item = (wxMenuItem *)NULL;
    wxMenuItemList::compatibility_iterator node = GetMenuItems().GetFirst();

    size_t pos;
    for ( pos = 0; node; pos++ )
    {
        if ( node->GetData()->GetId() == id )
        {
            item = node->GetData();

            break;
        }

        node = node->GetNext();
    }

    if ( ppos )
    {
        *ppos = item ? pos : (size_t)wxNOT_FOUND;
    }

    return item;
}

// find by position
wxMenuItem* wxMenuBase::FindItemByPosition(size_t position) const
{
    wxCHECK_MSG( position < m_items.GetCount(), NULL,
                 _T("wxMenu::FindItemByPosition(): invalid menu index") );

    return m_items.Item( position )->GetData();
}

// ----------------------------------------------------------------------------
// wxMenu helpers used by derived classes
// ----------------------------------------------------------------------------

// Update a menu and all submenus recursively. source is the object that has
// the update event handlers defined for it. If NULL, the menu or associated
// window will be used.
void wxMenuBase::UpdateUI(wxEvtHandler* source)
{
    if (GetInvokingWindow())
    {
        // Don't update menus if the parent
        // frame is about to get deleted
        wxWindow *tlw = wxGetTopLevelParent( GetInvokingWindow() );
        if (tlw && wxPendingDelete.Member(tlw))
            return;
    }

    if ( !source && GetInvokingWindow() )
        source = GetInvokingWindow()->GetEventHandler();
    if ( !source )
        source = GetEventHandler();
    if ( !source )
        source = this;

    wxMenuItemList::compatibility_iterator  node = GetMenuItems().GetFirst();
    while ( node )
    {
        wxMenuItem* item = node->GetData();
        if ( !item->IsSeparator() )
        {
            wxWindowID id = item->GetId();
            wxUpdateUIEvent event(id);
            event.SetEventObject( source );

            if ( source->ProcessEvent(event) )
            {
                // if anything changed, update the changed attribute
                if (event.GetSetText())
                    SetLabel(id, event.GetText());
                if (event.GetSetChecked())
                    Check(id, event.GetChecked());
                if (event.GetSetEnabled())
                    Enable(id, event.GetEnabled());
            }

            // recurse to the submenus
            if ( item->GetSubMenu() )
                item->GetSubMenu()->UpdateUI(source);
        }
        //else: item is a separator (which doesn't process update UI events)

        node = node->GetNext();
    }
}

bool wxMenuBase::SendEvent(int id, int checked)
{
    wxCommandEvent event(wxEVT_COMMAND_MENU_SELECTED, id);
    event.SetEventObject(this);
    event.SetInt(checked);

    bool processed = false;

    // Try the menu's event handler
    // if ( !processed )
    {
        wxEvtHandler *handler = GetEventHandler();
        if ( handler )
            processed = handler->ProcessEvent(event);
    }

    // Try the window the menu was popped up from (and up through the
    // hierarchy)
    if ( !processed )
    {
        const wxMenuBase *menu = this;
        while ( menu )
        {
            wxWindow *win = menu->GetInvokingWindow();
            if ( win )
            {
                processed = win->GetEventHandler()->ProcessEvent(event);
                break;
            }

            menu = menu->GetParent();