use fltk::{prelude::*, *};
use fltk_theme::{color_themes, ColorTheme};
fn main() {
let a = app::App::default().with_scheme(app::Scheme::Gtk);
let theme = ColorTheme::from_colormap(color_themes::DARK_THEME);
theme.apply();
let mut win = window::Window::default().with_size(400, 300);
let mut btn = button::Button::new(160, 200, 80, 40, "Hello");
btn.set_color(btn.color().lighter());
win.end();
win.show();
a.run().unwrap();
}