There is a global event manager in my application. To listen to an event, I
need to specify the string name of the event and a lambda as callback function.
Event->Listen("WindowResize", [=]{
// ...
});
Now I want to register to event in JavaScript, too. I show you my code below.
There are some engine specific calls but it should be quite easy to understand.
v8::Handle<v8::Value> ModuleConsole::jsOn(const v8::Arguments& args)
{
ModuleConsole *module =
(ModuleConsole*)HelperScript::Unwrap(args.Data());
if(args.Length() < 1 || !args[0]->IsString())
return v8::Undefined();
string name = *v8::String::Utf8Value(args[0]);
if(args.Length() < 2 || !args[1]->IsFunction())
return v8::Undefined();
v8::Handle<v8::Function> callback =
v8::Local<v8::Function>::Cast(args[1]->ToObject());
if(callback.IsEmpty())
{
HelperDebug::Fail("script", "invalid callback function");
return v8::Undefined();
}
v8::Persistent<v8::Function> persistent =
v8::Persistent<v8::Function>::New(args.GetIsolate(), callback);
module->Event->Listen(name, [&]{
v8::HandleScope scope(args.GetIsolate());
v8::TryCatch trycatch;
persistent->Call(v8::Context::GetCurrent()->Global(), 0, NULL);
});
return v8::Undefined();
}
However, when I register to an event from JavaScript like below, there is a
access violation at persistent->Call(...).
on('WindowResize', function () {
print('Hello World!');
});
I am using a single JavaScript context in my application. What am I doing wrong?
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