Changing the default styling of widget?

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Below is an app that sets the theme and displays some buttons with custom styling:

use iced::widget::{button, row, Column};
use iced::{Color, Element, Theme};

#[derive(Default)]
struct App {}

#[derive(Debug, Clone)]
enum Message { Button }

fn update(_st: &mut App, _m: Message) {}

fn view2(_st: &App) -> Element<Message> {
    row![["Alpha", "Beta", "Gamma", "Delta", "Epsilon"]
        .into_iter()
        .fold(Column::new().spacing(4), |c, s| c.push(
            button(s)
                .on_press(Message::Button)
                .style(|theme: &Theme, status| {
                    use button::Catalog;
                    let mut sty = theme.style(&<Theme as button::Catalog>::default(), status);
                    if status == button::Status::Hovered {
                        sty.border.color = Color::from_rgba(1.0, 1.0, 1.0, 0.5);
                        sty.border.width = 2.0;
                    }
                    sty
                })
        ))]
    .padding(16)
    .spacing(8)
    .into()
}

fn main() -> iced::Result {
    iced::application("App", update, view2)
        .theme(|_st| Theme::Dark)
        .run()
}

Two questions:

  • The theme.style(&<Theme as button::Catalog>::default(), status); code is clumsy. Is there a better way to get the current styling of a widget?
  • This only changes the styling of buttons where I explicitly apply the styling code. Is there a way to change the styling of all buttons in the app?