nixos-configs/config/ags/js/bar/systray.js

const { SystemTray } = ags.Service;
const { Box, Button, Icon, MenuItem } = ags.Widget;
const { Gtk } = imports.gi;

import { EventBox } from '../misc/cursorbox.js';

const SysTrayItem = item => MenuItem({
  className: 'tray-item',
  child: Icon({
    size: 24,
  }),
  submenu: item.menu,
  connections: [[item, btn => {
    btn.child.icon = item.icon;
    btn.tooltipMarkup = item.tooltipMarkup;
  }]]
});

export const SysTray = ags.Widget({
  type: Gtk.MenuBar,
  className: 'sys-tray',
  properties: [
    ['items', new Map()],
    ['onAdded', (box, id) => {
      const item = SystemTray.getItem(id);
      if (box._items.has(id) || !item)
        return;

      const widget = SysTrayItem(item);
      box._items.set(id, widget);
      box.add(widget);
      box.show_all();
    }],
    ['onRemoved', (box, id) => {
      if (!box._items.has(id))
        return;

      box._items.get(id).destroy();
      box._items.delete(id);
    }],
  ],
  connections: [
    [SystemTray, (box, id) => box._onAdded(box, id), 'added'],
    [SystemTray, (box, id) => box._onRemoved(box, id), 'removed'],
  ],
});