# Objective
The new `bevy_input_focus` crates has a tool to bubble input events up
the entity hierarchy, ending with the window, based on the currently
focused entity. Right now though, this only works for keyboard events!
Both `bevy_ui` buttons and `bevy_egui` should hook into this system
(primarily for contextual hotkeys), and we would like to drive
`leafwing_input_manager` via these events, to help resolve longstanding
pain around "absorbing" / "consuming" inputs based on focus. In order to
make that work properly though, we need gamepad support!
## Solution
The logic backing this has been changed to be generic for any cloneable
event types, and the machinery to make use of this externally has been
made `pub`.
Within the engine itself, I've added support for gamepad button and
scroll events, but nothing else. Mouse button / touch bubbling is
handled via bevy_picking, and mouse / gamepad motion doesn't really make
sense to bubble.
## Testing
The `tab_navigation` example continues to work, and CI is green.
## Future Work
I would like to add more complex UI examples to stress test this, but
not here please.
We should take advantage of the bubbled mouse scrolling when defining
scrolled widgets.
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