Function zng::event::on_pre_command

source · 
pub fn on_pre_command<U, CB, E, EB, H>(
    child: U,
    command_builder: CB,
    enabled_builder: EB,
    handler: H,
) -> impl UiNode
where
    U: UiNode,
    CB: FnMut() -> Command + Send + 'static,
    E: Var<bool>,
    EB: FnMut() -> E + Send + 'static,
    H: WidgetHandler<CommandArgs>,
Expand description

Helper for declaring command preview handlers.

Other then the route this helper behaves exactly like on_command.

§Route

The event handler is called before the on_command equivalent at the same context level. If the command event targets more then one widget and one widget contains the other, the handler is called on the inner widget first.