menu.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

*/

wxMenuBar* wxMenuBar::s_macInstalledMenuBar = NULL ;
wxMenuBar* wxMenuBar::s_macCommonMenuBar = NULL ;

void wxMenuBar::Init()
{
    m_eventHandler = this;
    m_menuBarFrame = NULL;
    m_invokingWindow = (wxWindow*) NULL;
}

wxMenuBar::wxMenuBar()
{
    Init();
}

wxMenuBar::wxMenuBar( long WXUNUSED(style) )
{
    Init();
}


wxMenuBar::wxMenuBar(size_t count, wxMenu *menus[], const wxString titles[], long WXUNUSED(style))
{
    Init();

    m_titles.Alloc(count);

    for ( size_t i = 0; i < count; i++ )
    {
        m_menus.Append(menus[i]);
        m_titles.Add(titles[i]);

        menus[i]->Attach(this);
    }
}

wxMenuBar::~wxMenuBar()
{
    if (s_macCommonMenuBar == this)
        s_macCommonMenuBar = NULL;
    if (s_macInstalledMenuBar == this)
    {
        ::ClearMenuBar();
        s_macInstalledMenuBar = NULL;
    }

}

void wxMenuBar::Refresh(bool WXUNUSED(eraseBackground), const wxRect *WXUNUSED(rect))
{
    wxCHECK_RET( IsAttached(), wxT("can't refresh unatteched menubar") );

    DrawMenuBar();
}

void wxMenuBar::MacInstallMenuBar()
{
    if ( s_macInstalledMenuBar == this )
        return ;

    wxStAppResource resload ;

    Handle menubar = ::GetNewMBar( kwxMacMenuBarResource ) ;
    wxString message ;
    wxCHECK_RET( menubar != NULL, wxT("can't read MBAR resource") );
    ::SetMenuBar( menubar ) ;
#if TARGET_API_MAC_CARBON
    ::DisposeMenuBar( menubar ) ;
#else
    ::DisposeHandle( menubar ) ;
#endif

#if TARGET_API_MAC_OS8
    MenuHandle menu = ::GetMenuHandle( kwxMacAppleMenuId ) ;
    if ( CountMenuItems( menu ) == 2 )
    {
        ::AppendResMenu(menu, 'DRVR');
    }
#endif

    // clean-up the help menu before adding new items
    MenuHandle mh = NULL ;
    if ( UMAGetHelpMenu( &mh , &firstUserHelpMenuItem) == noErr )
    {
        for ( int i = CountMenuItems( mh ) ; i >= firstUserHelpMenuItem ; --i )
        {
            DeleteMenuItem( mh , i ) ;
        }
    }
    else
    {
        mh = NULL ;
    }
#if TARGET_CARBON
    if ( UMAGetSystemVersion() >= 0x1000 && wxApp::s_macPreferencesMenuItemId)
    {
        wxMenuItem *item = FindItem( wxApp::s_macPreferencesMenuItemId , NULL ) ;
        if ( item == NULL || !(item->IsEnabled()) )
            DisableMenuCommand( NULL , kHICommandPreferences ) ;
        else
            EnableMenuCommand( NULL , kHICommandPreferences ) ;
    }
#endif
       for (size_t i = 0; i < m_menus.GetCount(); i++)
      {
        wxMenuItemList::Node *node;
        wxMenuItem *item;
        int pos ;
        wxMenu* menu = m_menus[i] , *subMenu = NULL ;

        if( m_titles[i] == wxT("?") || m_titles[i] == wxT("&?")  || m_titles[i] == wxApp::s_macHelpMenuTitleName )
        {
            if ( mh == NULL )
            {
                continue ;
            }

              for (pos = 0 , node = menu->GetMenuItems().GetFirst(); node; node = node->GetNext(), pos++)
              {
                 item = (wxMenuItem *)node->GetData();
                 subMenu = item->GetSubMenu() ;
                if (subMenu)
                {
                    // we don't support hierarchical menus in the help menu yet
                }
                else
                {
                    if ( item->IsSeparator() )
                    {
                        if ( mh )
                            MacAppendMenu(mh, "\p-" );
                    }
                    else
                    {
                        wxAcceleratorEntry* entry = wxAcceleratorEntry::Create( item->GetText() ) ;

                        if ( item->GetId() == wxApp::s_macAboutMenuItemId )
                        {
                                UMASetMenuItemText( GetMenuHandle( kwxMacAppleMenuId ) , 1 , item->GetText() , wxFont::GetDefaultEncoding() );
                                UMAEnableMenuItem( GetMenuHandle( kwxMacAppleMenuId ) , 1 , true );
                                SetMenuItemCommandID( GetMenuHandle( kwxMacAppleMenuId ) , 1 , item->GetId() ) ;
                                UMASetMenuItemShortcut( GetMenuHandle( kwxMacAppleMenuId ) , 1 , entry ) ;
                         }
                        else
                        {
                            if ( mh )
                            {
                                UMAAppendMenuItem(mh, item->GetText()  , wxFont::GetDefaultEncoding(), entry);
                                SetMenuItemCommandID( mh , CountMenuItems(mh) , item->GetId() ) ;
                            }
                        }

                        delete entry ;
                    }
                }
            }
        }
        else
        {
            UMASetMenuTitle( MAC_WXHMENU(menu->GetHMenu()) , m_titles[i], m_font.GetEncoding()  ) ;
            m_menus[i]->MacBeforeDisplay(false) ;
            ::InsertMenu(MAC_WXHMENU(m_menus[i]->GetHMenu()), 0);
        }
    }
    ::DrawMenuBar() ;
    s_macInstalledMenuBar = this;
}

void wxMenuBar::EnableTop(size_t pos, bool enable)
{
    wxCHECK_RET( IsAttached(), wxT("doesn't work with unattached menubars") );
    m_menus[pos]->MacEnableMenu( enable ) ;
    Refresh();
}

void wxMenuBar::SetLabelTop(size_t pos, const wxString& label)
{
    wxCHECK_RET( pos < GetMenuCount(), wxT("invalid menu index") );

    m_titles[pos] = label;

    if ( !IsAttached() )
    {
        return;
    }

    m_menus[pos]->SetTitle( label ) ;
    if (wxMenuBar::s_macInstalledMenuBar == this) // are we currently installed ?
    {
        ::SetMenuBar( GetMenuBar() ) ;
        ::InvalMenuBar() ;
    }
}

wxString wxMenuBar::GetLabelTop(size_t pos) const
{
    wxCHECK_MSG( pos < GetMenuCount(), wxEmptyString,
                 wxT("invalid menu index in wxMenuBar::GetLabelTop") );

    return m_titles[pos];
}

int wxMenuBar::FindMenu(const wxString& title)
{
    wxString menuTitle = wxStripMenuCodes(title);

    size_t count = GetMenuCount();
    for ( size_t i = 0; i < count; i++ )
    {
        wxString title = wxStripMenuCodes(m_titles[i]);
        if ( menuTitle == title )
            return i;
    }

    return wxNOT_FOUND;

}


// ---------------------------------------------------------------------------
// wxMenuBar construction
// ---------------------------------------------------------------------------

// ---------------------------------------------------------------------------
// wxMenuBar construction
// ---------------------------------------------------------------------------

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

    if ( IsAttached() )
    {
        if (s_macInstalledMenuBar == this)
        {
            menuOld->MacAfterDisplay( false ) ;
            ::DeleteMenu( menuOld->MacGetMenuId() /* m_menus[pos]->MacGetMenuId() */ ) ;
            {
                menu->MacBeforeDisplay( false ) ;
                UMASetMenuTitle( MAC_WXHMENU(menu->GetHMenu()) , title , m_font.GetEncoding() ) ;
                if ( pos == m_menus.GetCount() - 1)
                {
                    ::InsertMenu( MAC_WXHMENU(menu->GetHMenu()) , 0 ) ;
                }
                else
                {
                    ::InsertMenu( MAC_WXHMENU(menu->GetHMenu()) , m_menus[pos+1]->MacGetMenuId() ) ;
                }
            }
        }

        Refresh();
    }

    return menuOld;
}

bool wxMenuBar::Insert(size_t pos, wxMenu *menu, const wxString& title)
{
    if ( !wxMenuBarBase::Insert(pos, menu, title) )
        return false;

    m_titles.Insert(title, pos);

    UMASetMenuTitle( MAC_WXHMENU(menu->GetHMenu()) , title , m_font.GetEncoding() ) ;

    if ( IsAttached() && s_macInstalledMenuBar == this )
    {
        if (s_macInstalledMenuBar == this)
        {
            menu->MacBeforeDisplay( false ) ;
            if ( pos == (size_t) -1  || pos + 1 == m_menus.GetCount() )
            {
                ::InsertMenu( MAC_WXHMENU(menu->GetHMenu()) , 0 ) ;
            }
            else
            {
                ::InsertMenu( MAC_WXHMENU(menu->GetHMenu()) , m_menus[pos+1]->MacGetMenuId() ) ;
            }
        }
        Refresh();
    }

    return true;
}

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

    if ( IsAttached() )
    {
        if (s_macInstalledMenuBar == this)
        {
            ::DeleteMenu( menu->MacGetMenuId() /* m_menus[pos]->MacGetMenuId() */ ) ;
        }

        Refresh();
    }

    m_titles.RemoveAt(pos);

    return menu;
}

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;

    m_titles.Add(title);

    UMASetMenuTitle( MAC_WXHMENU(menu->GetHMenu()) , title , m_font.GetEncoding() ) ;

    if ( IsAttached() )
    {
        if (s_macInstalledMenuBar == this)
        {
            ::InsertMenu( MAC_WXHMENU(menu->GetHMenu()) , 0 ) ;
        }

        Refresh();
    }

   // m_invokingWindow is set after wxFrame::SetMenuBar(). This call enables
    // adding menu later on.
    if (m_invokingWindow)
        wxMenubarSetInvokingWindow( menu, m_invokingWindow );

    return true;
}

static void wxMenubarUnsetInvokingWindow( wxMenu *menu )
{
    menu->SetInvokingWindow( (wxWindow*) NULL );

    wxMenuItemList::Node *node = menu->GetMenuItems().GetFirst();
    while (node)
    {
        wxMenuItem *menuitem = node->GetData();
        if (menuitem->IsSubMenu())
            wxMenubarUnsetInvokingWindow( menuitem->GetSubMenu() );
        node = node->GetNext();
    }
}

static void wxMenubarSetInvokingWindow( wxMenu *menu, wxWindow *win )
{
    menu->SetInvokingWindow( win );

    wxMenuItemList::Node *node = menu->GetMenuItems().GetFirst();
    while (node)
    {
        wxMenuItem *menuitem = node->GetData();
        if (menuitem->IsSubMenu())
            wxMenubarSetInvokingWindow( menuitem->GetSubMenu() , win );
        node = node->GetNext();
    }
}

void wxMenuBar::UnsetInvokingWindow()
{
    m_invokingWindow = (wxWindow*) NULL;
    wxMenuList::Node *node = m_menus.GetFirst();
    while (node)
    {
        wxMenu *menu = node->GetData();
        wxMenubarUnsetInvokingWindow( menu );
        node = node->GetNext();
    }
}

void wxMenuBar::SetInvokingWindow(wxFrame *frame)
{
    m_invokingWindow = frame;
    wxMenuList::Node *node = m_menus.GetFirst();
    while (node)
    {
        wxMenu *menu = node->GetData();
        wxMenubarSetInvokingWindow( menu, frame );
        node = node->GetNext();
    }
}

void wxMenuBar::Detach()
{
    wxMenuBarBase::Detach() ;
}

void wxMenuBar::Attach(wxFrame *frame)
{
    wxMenuBarBase::Attach( frame ) ;
}
// ---------------------------------------------------------------------------
// wxMenuBar searching for menu items
// ---------------------------------------------------------------------------

// Find the itemString in menuString, and return the item id or wxNOT_FOUND
int wxMenuBar::FindMenuItem(const wxString& menuString,
                            const wxString& itemString) const
{
    wxString menuLabel = wxStripMenuCodes(menuString);
    size_t count = GetMenuCount();
    for ( size_t i = 0; i < count; i++ )
    {
        wxString title = wxStripMenuCodes(m_titles[i]);
        if ( menuString == title )
            return m_menus[i]->FindItem(itemString);
    }

    return wxNOT_FOUND;
}

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 = m_menus[i]->FindItem(id, itemMenu);
    }

    return item;
}