Roku Developer Program

Join our online forum to talk to Roku developers and fellow channel creators. Ask questions, share tips with the community, and find helpful resources.
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Returning focus to a custom component

Hello, I'm new to BrightScript and trying to get to grips with it. Apologies in advance if this is super basic, I shall try to ask progressively more difficult questions as time goes on!

So I have a custom component with some other components inside it, simplistic example (real life is complicated):
<component name="TopMenu" extends="Group" initialFocus="foo1">
      <Button id="foo1" text="Hello" />
      <Button id="foo2" text="World" />

InitialFocus works fine when the app starts up, then upon user interaction the scene transfers focus to another component (e.g. a MarkupGrid).

Later, in the scene code, I try to transfer focus back to my component, e.g.

...but this doesn't do anything automatically (i.e. re-trigger initialFocus) and I can't find anything built-in to observe which would allow me to react in the component code.

This (reaching in and focusing the LayoutGroup directly, not nice but worth trying in case there's some special magic) doesn't do anything either

This (directly setting focus on the first button) does work
topMenu.getChild(0).getChild(0).setFocus(true) obviously I could observe a new "hasCustomFocus" interface on my component, then make sure I use that instead of setFocus, and react to changes to refocus the previously focused button (which I'd have to keep track of myself). Surely I'd be clumsily duplicating functionality that's already built-in though, and future code maintainers will realise I'm an idiot.

What's the right thing to do here? Thanks in advance!
0 Kudos
Binge Watcher

Re: Returning focus to a custom component

Thank you so much i was stuck on this!

0 Kudos
Roku Guru

Re: Returning focus to a custom component

Oh, hilarious.. I saw this thread in the list and thought somebody had nicked my name. But it's my old account, from back when I didn't know anything!

So, I eventually progressed beyond the custom focus setter but I'm not sure the current approach is cleaner. As you can see, nobody contributed a good answer. 🙂

I ended up with a pretty messy solution involving observing 'focusedChild', and making use of .isInFocusChain(). I seem to recall you get a 'focusedChild' event in a component when you .setFocus() it, and then you can do a setFocus on the child component you want to actually be selected.

I'm afraid I abstracted it all away into code I no longer totally understand, but you at least have two avenues to investigate now.

0 Kudos
Need Assistance?
Welcome to the Roku Community! Feel free to search our Community for answers or post your question to get help.

Become a Roku Streaming Expert!

Share your expertise, help fellow streamers, and unlock exclusive rewards as part of the Roku Community. Learn more.