Macro rat_focus::match_focus

macro_rules! match_focus {
    ($($field:expr => $block:expr),* $(, _ => $final:expr)?) => { ... };
}

Does a match on the state struct of a widget. If widget_state.is_focused() is true the block is executed. There is a _ branch too, that is evaluated if none of the given widget-states has the focus.

This requires that widget_state implements HasFocusFlag, but that’s the basic requirement for this whole crate.

use rat_focus::match_focus;

let res = match_focus!(
    state.field1 => {
        // do this
        true
    },
    state.field2 => {
        // do that
        true
    },
    _ => {
        false
    }
);

if res {
    // react
}