Re: nsIWebBrowserChrome methods not being called (in 1.3b)

[Martin Kenny]

OK, I've answered my own question; sometimes you just have to ask to 
figure out the answer yourself :-)

In case anyone has the same problem in the future, the problem was that 
I hadn't implemented the nsIInterfaceRequestor interface. Specifically 
the code that handles updating the status during link hovering uses 
nsIInterfaceRequestor::GetInterface to find the nsIWebBrowserChrome 
interface.

BTW, careful perusal of the winEmbed source showed the way.

Cheers,
Marty.
Martin Kenny wrote:
Hi,

I recently decided to put together a test embedding application (Win32, 
ATL) from scratch, using the "Gecko Embedding Basics" document as a guide.

I had something working in an hour or two, but what's been bugging me 
ever since is that I can't get any of the nsIWebBrowserChrome methods 
(notably SetStatus) to be called at all. This results in no status text 
when hovering the mouse over a link. When I implement BrowserChromeImpl, 
OnStateChange *is* called as the page loading state changes.

Nothing seems to even QueryInterface for nsIWebBrowserChrome.

The code to create the browser instance is shown below.

I've kept implementing other interfaces and calling extra methods (as 
seen in MfcEmbed) in the hope that something would make it start calling 
the SetStatus method, but no go.

If anyone has seen anything like this, or has a possible explanation, it 
would be really appreciated.

A zip of the source can be found at:
http://www.kennymoy.com.au/mozilla/BlueBall.zip
Cheers,
Marty.
//-------------------------------------------------------------
  nsresult rv;
  m_webBrowser = do_CreateInstance(NS_WEBBROWSER_CONTRACTID, &rv);
  if (NS_FAILED(rv))
    return rv;
  rv = NS_OK;
  m_webNavigation = do_QueryInterface(m_webBrowser, &rv);
  if (NS_FAILED(rv))
    return rv;
  m_browserChromeImpl = new BrowserChromeImpl(m_frameWnd);
  m_browserChromeImpl->AddRef();
  rv = 
m_webBrowser->SetContainerWindow(static_cast<nsIWebBrowserChrome*>(m_browserChromeImpl)); 

  if (NS_FAILED(rv))
    return rv;
  rv = NS_OK;
  m_baseWindow = do_QueryInterface(m_webBrowser, &rv);
  if (NS_FAILED(rv))
    return rv;
  rv = m_baseWindow->InitWindow(static_cast<HWND>(*this), nsnull, 
createStruct->x, createStruct->y, 1, 1);
  if (NS_FAILED(rv))
    return rv;

  rv = m_baseWindow->Create();
  if (NS_FAILED(rv))
    return rv;
m_webBrowser->AddWebBrowserListener(NS_GetWeakReference(static_cast<nsIWebBrowserChrome*>(m_browserChromeImpl)), 
NS_GET_IID(nsIWebProgressListener));

  rv = m_baseWindow->SetVisibility(PR_TRUE);
  if (NS_FAILED(rv))
    return rv;
  nsCOMPtr<nsIWebBrowserFocus> focus(do_GetInterface(m_webBrowser));
  focus->Activate();
  rv = m_webNavigation->LoadURI(L"http://www.mozilla.org/";, 
nsIWebNavigation::LOAD_FLAGS_NONE, nsnull, nsnull, nsnull);