Input handling

41.09 How to handle focus

Kinds of focus
- Mouse clicks
- Hover
- Drag
- Keyboard handling
- (Re)rendering

How to detect focus
- Mouse click / hover / drag
    -  “global” — assuming a single mouse
- Keyboard handling
    - local, depends on current focus

I.e. mouse “events” should probably be handled globally, then “passed” to the correct place
Keyboard focus is different, though could perhaps also be globally handled
(Re)rendering is local

Ways to solve
- Mouse focus
    - When mouse is colliding with an area, “a hitbox” of a ui element, that thing is focused
- Keyboard focus
    - Actions trigger focusing for keyboard events, e.g.
        - Clicking an element
        - Using ctrl+tab (or similar)
        - Possible M+e / M+g to switch between editor and game
- (Re)rendering
    - This should be local, i.e. if the thing is “active” it should be rendered