app.cpp

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

            }
        }
    }

    if ( macId == 0 )
        macId = (int) wxId ;

    return macId ;
}

wxMenu* wxFindMenuFromMacCommand( const HICommand &command , wxMenuItem* &item )
{
    wxMenu* itemMenu = NULL ;
    int id = 0 ;

    // for 'standard' commands which don't have a wx-menu
    if ( command.commandID == kHICommandPreferences || command.commandID == kHICommandQuit || command.commandID == kHICommandAbout )
    {
        id = wxMacCommandToId( command.commandID ) ;

        wxMenuBar* mbar = wxMenuBar::MacGetInstalledMenuBar() ;
        if ( mbar )
            item = mbar->FindItem( id , &itemMenu ) ;
    }
    else if ( command.commandID != 0 && command.menu.menuRef != 0 && command.menu.menuItemIndex != 0 )
    {
        id = wxMacCommandToId( command.commandID ) ;
        // make sure it is one of our own menus, or of the 'synthetic' apple and help menus , otherwise don't touch
        MenuItemIndex firstUserHelpMenuItem ;
        static MenuHandle mh = NULL ;
        if ( mh == NULL )
        {
            if ( UMAGetHelpMenu( &mh , &firstUserHelpMenuItem) != noErr )
                mh = NULL ;
        }

        // is it part of the application or the Help menu, then look for the id directly
        if ( ( GetMenuHandle( kwxMacAppleMenuId ) != NULL && command.menu.menuRef == GetMenuHandle( kwxMacAppleMenuId ) ) ||
             ( mh != NULL && command.menu.menuRef == mh ) )
        {
            wxMenuBar* mbar = wxMenuBar::MacGetInstalledMenuBar() ;
            if ( mbar )
                item = mbar->FindItem( id , &itemMenu ) ;
        }
        else
        {
            URefCon refCon ;

            GetMenuItemRefCon( command.menu.menuRef , command.menu.menuItemIndex , &refCon ) ;
            itemMenu = wxFindMenuFromMacMenu( command.menu.menuRef ) ;
            if ( itemMenu != NULL )
                item = (wxMenuItem*) refCon ;
        }
    }

    return itemMenu ;
}

//----------------------------------------------------------------------
// Carbon Event Handler
//----------------------------------------------------------------------

static const EventTypeSpec eventList[] =
{
    { kEventClassCommand, kEventProcessCommand } ,
    { kEventClassCommand, kEventCommandUpdateStatus } ,

    { kEventClassMenu, kEventMenuOpening },
    { kEventClassMenu, kEventMenuClosed },
    { kEventClassMenu, kEventMenuTargetItem },

    { kEventClassApplication , kEventAppActivated } ,
    { kEventClassApplication , kEventAppDeactivated } ,
    // handling the quit event is not recommended by apple
    // rather using the quit apple event - which we do

    { kEventClassAppleEvent , kEventAppleEvent } ,

    { kEventClassMouse , kEventMouseDown } ,
    { kEventClassMouse , kEventMouseMoved } ,
    { kEventClassMouse , kEventMouseUp } ,
    { kEventClassMouse , kEventMouseDragged } ,
    { 'WXMC' , 'WXMC' }
} ;

static pascal OSStatus
wxMacAppMenuEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
{
    wxMacCarbonEvent cEvent( event ) ;
    MenuRef menuRef = cEvent.GetParameter<MenuRef>(kEventParamDirectObject) ;
    wxMenu* menu = wxFindMenuFromMacMenu( menuRef ) ;

    if ( menu )
    {
        wxEventType type=0;
        MenuCommand cmd=0;
        switch (GetEventKind(event))
        {
            case kEventMenuOpening:
                type = wxEVT_MENU_OPEN;
                break;

            case kEventMenuClosed:
                type = wxEVT_MENU_CLOSE;
                break;

            case kEventMenuTargetItem:
                cmd = cEvent.GetParameter<MenuCommand>(kEventParamMenuCommand,typeMenuCommand) ;
                if (cmd != 0)
                    type = wxEVT_MENU_HIGHLIGHT;
                break;

            default:
                wxFAIL_MSG(wxT("Unexpected menu event kind"));
                break;
        }

        if ( type )
        {
            wxMenuEvent wxevent(type, cmd, menu);
            wxevent.SetEventObject(menu);

            wxEvtHandler* handler = menu->GetEventHandler();
            if (handler && handler->ProcessEvent(wxevent))
            {
                // handled
            }
            else
            {
                wxWindow *win = menu->GetInvokingWindow();
                if (win)
                    win->GetEventHandler()->ProcessEvent(wxevent);
                }
            }
    }

    return eventNotHandledErr;
}

static pascal OSStatus wxMacAppCommandEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
{
    OSStatus result = eventNotHandledErr ;

    HICommand command ;

    wxMacCarbonEvent cEvent( event ) ;
    cEvent.GetParameter<HICommand>(kEventParamDirectObject,typeHICommand,&command) ;

    wxMenuItem* item = NULL ;
    wxMenu* itemMenu = wxFindMenuFromMacCommand( command , item ) ;
    int id = wxMacCommandToId( command.commandID ) ;

    if ( item )
    {
        wxASSERT( itemMenu != NULL ) ;

        switch ( cEvent.GetKind() )
        {
            case kEventProcessCommand :
            {
                if (item->IsCheckable())
                    item->Check( !item->IsChecked() ) ;

                if ( itemMenu->SendEvent( id , item->IsCheckable() ? item->IsChecked() : -1 ) )
                    result = noErr ;
            }
            break ;

        case kEventCommandUpdateStatus:
            {
                wxUpdateUIEvent event(id);
                event.SetEventObject( itemMenu );

                bool processed = false;

                // Try the menu's event handler
                {
                    wxEvtHandler *handler = itemMenu->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 = itemMenu;
                    while ( menu )
                    {
                        wxWindow *win = menu->GetInvokingWindow();
                        if ( win )
                        {
                            processed = win->GetEventHandler()->ProcessEvent(event);
                            break;
                        }

                        menu = menu->GetParent();
                    }
                }

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

                    result = noErr ;
                }
            }
            break ;

        default :
            break ;
        }
    }
    return result ;
}

static pascal OSStatus wxMacAppApplicationEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
{
    OSStatus result = eventNotHandledErr ;
    switch ( GetEventKind( event ) )
    {
        case kEventAppActivated :
            if ( wxTheApp )
                wxTheApp->SetActive( true , NULL ) ;
            result = noErr ;
            break ;

        case kEventAppDeactivated :
            if ( wxTheApp )
                wxTheApp->SetActive( false , NULL ) ;
            result = noErr ;
            break ;

        default :
            break ;
    }

    return result ;
}

pascal OSStatus wxMacAppEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
{
    EventRef formerEvent = (EventRef) wxTheApp->MacGetCurrentEvent() ;
    EventHandlerCallRef formerEventHandlerCallRef = (EventHandlerCallRef) wxTheApp->MacGetCurrentEventHandlerCallRef() ;
    wxTheApp->MacSetCurrentEvent( event , handler ) ;

    OSStatus result = eventNotHandledErr ;
    switch ( GetEventClass( event ) )
    {
        case kEventClassCommand :
            result = wxMacAppCommandEventHandler( handler , event , data ) ;
            break ;

        case kEventClassApplication :
            result = wxMacAppApplicationEventHandler( handler , event , data ) ;
            break ;

        case kEventClassMenu :
            result = wxMacAppMenuEventHandler( handler , event , data ) ;
            break ;

        case kEventClassMouse :
            {
                wxMacCarbonEvent cEvent( event ) ;

                WindowRef window ;
                Point screenMouseLocation = cEvent.GetParameter<Point>(kEventParamMouseLocation) ;
                ::FindWindow(screenMouseLocation, &window);
                // only send this event in case it had not already been sent to a tlw, as we get
                // double events otherwise (in case event.skip) was called
                if ( window == NULL )
                    result = wxMacTopLevelMouseEventHandler( handler , event , NULL ) ;
            }
            break ;

        case kEventClassAppleEvent :
            {
                EventRecord rec ;

                wxMacConvertEventToRecord( event , &rec ) ;
                result = AEProcessAppleEvent( &rec ) ;
            }
            break ;

        default :
            break ;
    }

    wxTheApp->MacSetCurrentEvent( formerEvent, formerEventHandlerCallRef ) ;

    return result ;
}

DEFINE_ONE_SHOT_HANDLER_GETTER( wxMacAppEventHandler )

#ifdef __WXDEBUG__

pascal static void wxMacAssertOutputHandler(OSType componentSignature, UInt32 options,
    const char *assertionString, const char *exceptionLabelString,
    const char *errorString, const char *fileName, long lineNumber, void *value, ConstStr255Param outputMsg)
{
    // flow into assert handling
    wxString fileNameStr ;
    wxString assertionStr ;
    wxString exceptionStr ;
    wxString errorStr ;

#if wxUSE_UNICODE
    fileNameStr = wxString(fileName, wxConvLocal);
    assertionStr = wxString(assertionString, wxConvLocal);
    exceptionStr = wxString((exceptionLabelString!=0) ? exceptionLabelString : "", wxConvLocal) ;
    errorStr = wxString((errorString!=0) ? errorString : "", wxConvLocal) ;
#else
    fileNameStr = fileName;
    assertionStr = assertionString;
    exceptionStr = (exceptionLabelString!=0) ? exceptionLabelString : "" ;
    errorStr = (errorString!=0) ? errorString : "" ;
#endif

#if 1
    // flow into log
    wxLogDebug( wxT("AssertMacros: %s %s %s file: %s, line: %ld (value %p)\n"),
        assertionStr.c_str() ,
        exceptionStr.c_str() ,
        errorStr.c_str(),
        fileNameStr.c_str(), lineNumber ,
        value ) ;
#else

    wxOnAssert(fileNameStr, lineNumber , assertionStr ,
        wxString::Format( wxT("%s %s value (%p)") , exceptionStr, errorStr , value ) ) ;
#endif
}

#endif //__WXDEBUG__

#ifdef __WXMAC_OSX__
extern "C"
{
   // m_macEventPosted run loop source callback:
   void macPostedEventCallback(void *unused);
}

void macPostedEventCallback(void *unused)
{
    wxTheApp->ProcessPendingEvents();
}
#endif

bool wxApp::Initialize(int& argc, wxChar **argv)
{
    // Mac-specific

#ifdef __WXDEBUG__
    InstallDebugAssertOutputHandler( NewDebugAssertOutputHandlerUPP( wxMacAssertOutputHandler ) );
#endif

    UMAInitToolbox( 4, sm_isEmbedded ) ;
    SetEventMask( everyEvent ) ;
    UMAShowWatchCursor() ;

#ifndef __DARWIN__
#  if __option(profile)
    ProfilerInit( collectDetailed, bestTimeBase , 40000 , 50 ) ;
#  endif
#endif

#ifndef __DARWIN__
    // now avoid exceptions thrown for new (bad_alloc)
    // FIXME CS for some changes outside wxMac does not compile anymore
#if 0
    std::__throws_bad_alloc = 0 ;
#endif

#endif

    // Mac OS X passes a process serial number command line argument when
    // the application is launched from the Finder. This argument must be
    // removed from the command line arguments before being handled by the
    // application (otherwise applications would need to handle it)
    if ( argc > 1 )
    {
        static const wxChar *ARG_PSN = _T("-psn_");
        if ( wxStrncmp(argv[1], ARG_PSN, wxStrlen(ARG_PSN)) == 0 )
        {
            // remove this argument
            --argc;
            memmove(argv + 1, argv + 2, argc * sizeof(char *));
        }
    }

    if ( !wxAppBase::Initialize(argc, argv) )
        return false;

#if wxUSE_INTL
    wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
#endif

#if TARGET_API_MAC_OSX
    // these might be the startup dirs, set them to the 'usual' dir containing the app bundle
    wxString startupCwd = wxGetCwd() ;
    if ( startupCwd == wxT("/") || startupCwd.Right(15) == wxT("/Contents/MacOS") )
    {
        CFURLRef url = CFBundleCopyBundleURL(CFBundleGetMainBundle() ) ;
        CFURLRef urlParent = CFURLCreateCopyDeletingLastPathComponent( kCFAllocatorDefault , url ) ;
        CFRelease( url ) ;
        CFStringRef path = CFURLCopyFileSystemPath ( urlParent , kCFURLPOSIXPathStyle ) ;
        CFRelease( urlParent ) ;
        wxString cwd = wxMacCFStringHolder(path).AsString(wxLocale::GetSystemEncoding());
        wxSetWorkingDirectory( cwd ) ;
    }
#endif

    wxMacCreateNotifierTable() ;

#ifdef __WXMAC_OSX__
    /* connect posted events to common-mode run loop so that wxPostEvent events
       are handled even while we're in the menu or on a scrollbar */