[EMAIL PROTECTED] wrote:
Hi,
I have written an C++ XPCOM component that correctly loads into Firefox
1.5, and I can successfully call methods on the component thanks to
XPConnect. What I would like to do now is allow the component to call
back into the javascript VM, as I can do with an IE ActiveX control
using ActiveX "events". Is it possible to do this? I would guess the
method would be something like this:
- Use the DOM from C++ to find a JS method which must be defined in the
script code of the calling web page. Alternately this method could be
passed to my component as an argument of some kind.
- Use some kind of magic glue code (nsXPConnect?) to call the JS
function from C++, packaging up the arguments as necessary.
So far I've found nothing to describe this process on the XPConnect
(http://www.mozilla.org/scriptable/) or XPCom
(http://www.mozilla.org/projects/xpcom/index.html) sites, and google
searches haven't helped either.
Can anyone explain A) if what I want to do is possible, and B) how to
do it or at least a pointer to the right header file.
I should point out that I am NOT building the Mozilla source code. I
am building my component on Win32 using the precompiled gecko SDK
(v1.8b1).
Thanks in advance,
Kevin
There's the custom IDL method...
[function, scriptable, uuid()]
/* this interface is implemented in JS */
interface ICallback : nsISupports {
void call( PRInt32 aParam );
};
[scriptable, uuid()]
/* this interface is implemented in C++ */
interface IFoo : nsISupports {
void docall( in ICallback aCallback);
};
and from JS:
function bar( aParam ) {
alert(aParam);
}
var foo = Components.classes[...].createInstance(IFoo);
foo.docall(bar);
(As with the observers case Sandip proposed, the JS needs to have chrome
privileges)
HTH
--
Mook
mook dot moz plus a whole ton of stuff at gmail dot com
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