updates

.config/ags/services/brightness.js

@@ -0,0 +1,59 @@
+import Service from 'resource:///com/github/Aylur/ags/service.js';
+import * as Utils from 'resource:///com/github/Aylur/ags/utils.js';
+const { exec, execAsync } = Utils;
+
+import { clamp } from '../modules/.miscutils/mathfuncs.js';
+
+class BrightnessService extends Service {
+    static {
+        Service.register(
+            this,
+            { 'screen-changed': ['float'], },
+            { 'screen-value': ['float', 'rw'], },
+        );
+    }
+
+    _screenValue = 0;
+
+    // the getter has to be in snake_case
+    get screen_value() { return this._screenValue; }
+
+    // the setter has to be in snake_case too
+    set screen_value(percent) {
+        percent = clamp(percent, 0, 1);
+        this._screenValue = percent;
+
+        Utils.execAsync(`brightnessctl s ${percent * 100}% -q`)
+            .then(() => {
+                // signals has to be explicity emitted
+                this.emit('screen-changed', percent);
+                this.notify('screen-value');
+
+                // or use Service.changed(propName: string) which does the above two
+                // this.changed('screen');
+            })
+            .catch(print);
+    }
+
+    constructor() {
+        super();
+        const current = Number(exec('brightnessctl g'));
+        const max = Number(exec('brightnessctl m'));
+        this._screenValue = current / max;
+    }
+
+    // overwriting connectWidget method, lets you
+    // change the default event that widgets connect to
+    connectWidget(widget, callback, event = 'screen-changed') {
+        super.connectWidget(widget, callback, event);
+    }
+}
+
+// the singleton instance
+const service = new BrightnessService();
+
+// make it global for easy use with cli
+globalThis.brightness = service;
+
+// export to use in other modules
+export default service;