We have embedded Mozilla 1.3.1 in an MFC (Windows) app. (We chose 1.3.1 for
compatibility with old macs.) It's running fine in most respects.
I'm unable, however, to make the IWebBrowserFocus interface work. This is
the code I'd like to run:
nsCOMPtr<nsIWebBrowserFocus> focus(do_GetInterface(m_pWebBrowser));
ASSERT(focus);
focus->SetFocusAtFirstElement();
Executing that code seems to have no effect. I've loaded an HTML page with a
<FORM> and some radio button inputs. I expect SetFocusAtFirstElement to put
the keyboard input focus on the first radio button, but it does not move the
focus at all.
I've tried the other methods on IWebBrowserFocus to no better effect. For
example, I've enumerated the DOM, found my input elements, and tried to set
the focus explicitly with SetFocusedElement. No luck.
As a temporary workaround I'm enumerating the windows Mozilla creates and
using the Windows API to set focus on one of them directly. That
works--except on Windows 98, where it seems to be causing a crash for
reasons that aren't yet clear. So we'd much prefer to use IWebBrowserFocus
if possible.
We are calling nsIWebBrowserFocus::Activate and Deactivate whenever our main
window is activated or deactivated. A source code comment suggested not
doing so might have bad effects. Are there other requirements I need to meet
in order for the SetFocus mechanism to work?
Brian
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