I agree with you. Do you know of any other sample that involves the creation
of widget ? At least the main frame window or the appshell . I need
something that involves graphical interfaces !
p.s.
excuse the name change i was in hurry setting up my news reader !
"John Bandhauer" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> scribble is a very bad example to be emulating. It is old and ill
> maintained. It does stuff that has long been superceeded.
>
> nsSample.cpp is much more modern.
>
> John.
>
> JohnSmith wrote:
> >
> > 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.
