Ali, Mazin wrote:
Hi
I'm trying to intercept combo box select.
here is my code, but the event never fire when I select new item from
the combo box.
anyone can help me in this one.
nsCOMPtr<nsIDOMHTMLSelectElement> SelectElement = do_QueryInterface(
pNode, &rs );
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(SelectElement) ;
nsCOMPtr<nsIDOMEventListener> eventListener = new sinkevent(this);
target->AddEventListener(NS_LITERAL_STRING("select"),eventListener,PR_TRUE)
;
The only difference I see between your AddEventListener () function and
mine is that I use 'false' for the last parameter of that function.
However, I think how you are implementing this is quite a bit different
than how I am. I implemented the nsIWebBrowserChrome object, then thru
the ::OnStateChange () function I find out when my web page has
completely loaded and then I do all my event sinks for the events I want...
I first get an nsIDOMWindow from aWebProgress->GetDOMWindow ()
(aWebProgress is passed to the ::OnStateChange () function), then I get
an nsIEventTarget by querying my nsIDOMWindow I just got. After I have
my nsIEventTarget, I then use nsIEventTarget::AddEventListener () to add
all my events..
Here is what that part looks like
rv = pCOM_det->AddEventListener (nsString (L"select"), this, false);
Have you tried the "change" event yet?
Here is a link to some Gecko Embedding docs, not sure if you have come
across it, but it has some good information in it.
http://www.mozilla.org/projects/embedding/embedoverview/EmbeddingBasics13.html
I haven't been working with this API for very long, I'm sure there are
much more experienced developers out there that could tell you if your
methodology is sound. I hope this helps.
Niky Williams
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