Trying to abstract stuff out of mozilla is iffy. Anything you use
that mozilla puts in the components dir had better also be put
int the components dir in your system.
There is ugly history here. Dynamic dll loading and
autoregistration came later. Have you been using lxr -
http://lxr.mozilla.org/seamonkey/ - to help you find stuff?
Perhaps you should look at the embedding apps. winEmbed may be a
good example.
John.
JohnSmith wrote:
>
> Ok. After some investigations it looks like regxpcom needs a components
> directory where i am guessing the implementation of my interfaces are
> located. Bear with me i am new to this. FYI my app runs from a standalone
> directory that has nothing to do with mozilla and it's directory structure.
> I was thinking that just linking through xpcom will do it but apparently it
> does not. I copied xpcom.dll , gkgfxwin.dll, mozreg.dll, xpcom.dll to my
> debug dir (that is where my scribble.exe binary is located) and created an
> empty dir called components under it. Am i supposed to have another dll that
> you know about based on the source below ? I was let to beleive (from the
> code) that eventloop was implemented inside xpcom.dll . I am wondering what
> components/evntloop.dll is implementing and why is the call to
> GetService(kEventQueueServiceCID, even working ! Please take the time and
> fill me in here ! If the code is too old can someone please take the time to
> do a sample app like scrbble .. it will only take a lunch session ...
>
> JohnSmith wrote in message <8vviqk$[EMAIL PROTECTED]>...
> >Hi.
> >
> >I am trying to instantiate an object and for the life of me i am not able
> to
> >do so. The code i have was copied verbatin from the widget/tests/scribble
> >application. It must be something stupid i am doing but I know this has to
> >do with registration so bear with me. Before i forget i am using straight
> >m18 build on an NT4sp3/VC60 . Here is the code
> >
> > // register event queue classes
> > static NS_DEFINE_IID(kEventQueueCID, NS_EVENTQUEUE_CID);
> > static NS_DEFINE_IID(kIEventQueueServiceIID,
> NS_IEVENTQUEUESERVICE_IID);
> > static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
> >
> > nsComponentManager::RegisterComponentLib(kEventQueueCID, NULL, NULL,
> >XPCOM_DLL, PR_FALSE, PR_FALSE);
> > nsComponentManager::RegisterComponentLib(kEventQueueServiceCID, NULL,
> >NULL, XPCOM_DLL, PR_FALSE, PR_FALSE);
> >
> > // register appshell classes
> > static NS_DEFINE_IID(kIAppShellIID, NS_IAPPSHELL_IID);
> > static NS_DEFINE_IID(kCAppShellCID, NS_APPSHELL_CID);
> > nsComponentManager::RegisterComponentLib(kCAppShellCID, NULL, NULL,
> >WIDGET_DLL, PR_FALSE, PR_FALSE);
> >
> > // register graphics classes
> > static NS_DEFINE_IID(kCDeviceContextCID, NS_DEVICE_CONTEXT_CID);
> > static NS_DEFINE_IID(kIDeviceContextIID, NS_IDEVICE_CONTEXT_IID);
> >
> > nsComponentManager::RegisterComponentLib(kCDeviceContextCID, NULL,
> NULL,
> >GFXWIN_DLL, PR_FALSE, PR_FALSE);
> >
> > nsresult res;
> >
> > // Create the Event Queue for the UI thread...
> > res = nsServiceManager::GetService(kEventQueueServiceCID,
> > kIEventQueueServiceIID,
> > (nsISupports
> >**)&scribbleData.mEventQService);
> >
> > if (NS_OK != res) {
> > NS_ASSERTION(PR_FALSE, "Could not obtain the event queue service");
> > return res;
> > }
> >
> > printf("Going to create the event queue\n");
> > res = scribbleData.mEventQService->CreateThreadEventQueue();
> > if (NS_OK != res) {
> > NS_ASSERTION(PR_FALSE, "Could not create the event queue for the
> >thread");
> > return res;
> > }
> >
> > // Create an application shell
> > nsIAppShell *appShell = nsnull;
> > nsComponentManager::CreateInstance(kCAppShellCID, nsnull,
> kIAppShellIID,
> > (void**)&appShell);
> > appShell->Create(argc, argv);
> >
> > res = nsComponentManager::CreateInstance(kCDeviceContextCID, nsnull,
> >kIDeviceContextIID, (void **)&scribbleData.mContext);
> >
> > if (NS_OK != res)
> > return res;
> >
> >The code works until it reachs
> >nsComponentManager::CreateInstance(kCDeviceContextCID,. At that point there
> >is an assertion raised. Here is the stack:
> >
> >NTDLL! 77f76148()
> >nsDebug::Assertion(const char * 0x100da79c, const char * 0x100da788, const
> >char * 0x100da738, int 157) line 256 + 13 bytes
> >nsDebug::WarnIfFalse(const char * 0x100da79c, const char * 0x100da788,
> const
> >char * 0x100da738, int 157) line 358 + 21 bytes
> >nsNativeComponentLoader::GetFactory(nsNativeComponentLoader * const
> >0x009d6c60, const nsID & {...}, const char * 0x009df2d0, const char *
> >0x009df310, nsIFactory * * 0x0012fa84) line 157 + 37 bytes
> >nsFactoryEntry::GetFactory(nsIFactory * * 0x0012fa84,
> nsComponentManagerImpl
> >* 0x009d4590) line 217 + 58 bytes
> >nsComponentManagerImpl::FindFactory(nsComponentManagerImpl * const
> >0x009d4590, const nsID & {...}, nsIFactory * * 0x0012fa84) line 1031
> >nsComponentManagerImpl::CreateInstance(nsComponentManagerImpl * const
> >0x009d4590, const nsID & {...}, nsISupports * 0x00000000, const nsID &
> >{...}, void * * 0x0012fae8) line 1198 + 20 bytes
> >nsComponentManager::CreateInstance(const nsID & {...}, nsISupports *
> >0x00000000, const nsID & {...}, void * * 0x0012fae8) line 82
> >nsServiceManagerImpl::GetService(nsServiceManagerImpl * const 0x009d3030,
> >const nsID & {...}, const nsID & {...}, nsISupports * * 0x0012fb78,
> >nsIShutdownListener * 0x00000000) line 344 + 19 bytes
> >nsServiceManager::GetService(const nsID & {...}, const nsID & {...},
> >nsISupports * * 0x0012fb78, nsIShutdownListener * 0x00000000) line 560
> >nsGetServiceByCID::operator()(const nsID & {...}, void * * 0x0012fb78) line
> >44 + 22 bytes
> >nsCOMPtr<nsIPref>::assign_from_helper(const nsCOMPtr_helper & {...}, const
> >nsID & {...}) line 856 + 18 bytes
> >nsCOMPtr<nsIPref>::nsCOMPtr<nsIPref>(const nsCOMPtr_helper & {...}) line
> 553
> >nsDeviceContextWin::nsDeviceContextWin() line 61 + 30 bytes
> >nsGfxFactoryWin::CreateInstance(nsGfxFactoryWin * const 0x009e00c0,
> >nsISupports * 0x00000000, const nsID & {...}, void * * 0x0041b68c) line 150
> >+ 30 bytes
> >nsComponentManagerImpl::CreateInstance(nsComponentManagerImpl * const
> >0x009d4590, const nsID & {...}, nsISupports * 0x00000000, const nsID &
> >{...}, void * * 0x0041b68c) line 1201 + 24 bytes
> >nsComponentManager::CreateInstance(const nsID & {...}, nsISupports *
> >0x00000000, const nsID & {...}, void * * 0x0041b68c) line 82
> >CreateApplication(int * 0x0012fecc, char * * 0x009d3260) line 149 + 25
> bytes
> >main(int 1, char * * 0x009d3260) line 8 + 13 bytes
> >WinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00400000, char *
> >0x00141e68, HINSTANCE__ * 0x00400000) line 105 + 41 bytes
> >WinMainCRTStartup() line 330 + 54 bytes
> >
> >If you take a close look at
> >nsNativeComponentLoader::GetFactory(nsNativeComponentLoader * const
> >0x009d6c60, const nsID & {...}, const char * 0x009df2d0, const char *
> >0x009df310, nsIFactory * * 0x0012fa84) line 157 + 37 bytes
> >
> >you will see the comment :
> >
> > // If the dll failed to get us a factory. But the dll registered that
> > // it would be able to create a factory for this CID. mmh!
> > // We cannot just delete the dll as the dll could be hosting
> > // other CID for which factory creation can pass.
> > // We will just let it be. The effect will be next time we try
> > // creating the object, we will query the dll again. Since the
> > // dll is loaded, this aint a big hit. So for optimized builds
> > // this is ok to limp along.
> > NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Factory creation failed");
> >
> >
> >If you have a way of registering all the components also please do tell me.
> >I called nsAutoregister (with the same bin dir) to no avail. I am about to
> >go and learn more about regxpcom.
> >
> >
> >
> >
