Can a few UIControls be combined in a Window and handle shared KeyBindings?

[4l1fe]

I'm creating a simple TUI that helps me change a terminal theme where i can interactively select a theme name from a list using FormatedTextControl and attached keybindings.

Currently, i'm trying to find a way to add BufferControl to the same window where the text control is to type a word for fuzzy finding the nearest lines in the theme names list for further selection.

However, i'm unsure whether it's possible to contain both controls in one window and handle one set of KeyBidings that allows me to type in arbitrary words for fuzzy finding and select the found lines in the list using arrows keys or ctrl + <key> combinations.

What is a proper way to combine these two controls and smoothly switch a focus between them as if they were a single control?