Qt/debugger: properly update when we load the symbols on boot

[aldelaro5]

This host event is still useful because the emu thread will load the symbols on boot if required. Though, this is the only useful place where it is used, the rest of the symbols update occurs manually with events when actually loading or editing symbols.

cc: @spycrab

[spycrab]

We should really drop the habit of emitting signals from outside a class. Signals from the Host class should only be emitted from within that class. Maybe add a Request$SIGNAL function to call it from the outside? Otherwise, LGTM.

[aldelaro5]

Can I know how that would work?

Because I really wonder how you can emit a signal from the instance of the host, but without having to necessarly having to get the instance within that lambda (it didn't seemed like I could do that in the lambda).

[spycrab]

@aldelaro5

Something similar to this:

void Host::RequestSomeUpdate()
{
  QueueOnObject(this, [this] { emit SomeUpdate(); });
}
// ...

void Host_SomeThing()
{
  Host::GetInstance().RequestSomeUpdate();
}

[aldelaro5]

@spycrab I tried this and I get the same problem, it doesn't seem you can fire from the instance.

[spycrab]

@aldelaro5 Just queue on QApplication::instance() then (for now, atleast).