nixos-configs/devices/wim/config/ags/js/quick-settings/toggle-button.js

import App from 'resource:///com/github/Aylur/ags/app.js';
import Mpris from 'resource:///com/github/Aylur/ags/service/mpris.js';

import { CenterBox, Icon, ToggleButton } from 'resource:///com/github/Aylur/ags/widget.js';


/** @param {import('types/widgets/revealer').default} rev */
export default (rev) => CenterBox({
    center_widget: ToggleButton({
        cursor: 'pointer',

        setup: (self) => {
            // Open at startup if there are players
            const id = Mpris.connect('changed', () => {
                self.set_active(Mpris.players.length > 0);
                Mpris.disconnect(id);
            });

            self.on('toggled', () => {
                if (self.get_active()) {
                    self.child
                        // @ts-expect-error
                        ?.setCss('-gtk-icon-transform: rotate(0deg);');
                    rev.reveal_child = true;
                }
                else {
                    self.child
                        // @ts-expect-error
                        ?.setCss('-gtk-icon-transform: rotate(180deg);');
                    rev.reveal_child = false;
                }
            });
        },

        child: Icon({
            icon: `${App.configDir }/icons/down-large.svg`,
            class_name: 'arrow',
            css: '-gtk-icon-transform: rotate(180deg);',
        }),
    }),
});