backlight: improve keyboard brightness control

po/ru.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: ximper-shell-notification-center 0.1.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-04-19 00:04+0300\n"
+"POT-Creation-Date: 2026-04-19 01:20+0300\n"
 "PO-Revision-Date: 2026-03-24 00:00+0300\n"
 "Last-Translator: \n"
 "Language-Team: Russian\n"
@@ -67,6 +67,10 @@ msgstr "Блокировки"
 msgid "Built-in Display"
 msgstr "Встроенный дисплей"
 
+#: src/controlCenter/widgets/backlight/backlight.vala:168
+msgid "Keyboard"
+msgstr "Клавиатура"
+
 #: src/controlCenter/widgets/quickSettings/tiles/dndTile.vala:5
 msgid "Do Not Disturb"
 msgstr "Не беспокоить"
@@ -182,7 +186,7 @@ msgstr "Очистить"
 msgid "No Notifications"
 msgstr "Нет уведомлений"
 
-#: data/ui/widgets/backlight.blp:44
+#: data/ui/widgets/backlight.blp:42
 msgid "Brightness"
 msgstr "Яркость"
 

po/ximper-shell-notification-center.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: ximper-shell-notification-center\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-04-19 00:04+0300\n"
+"POT-Creation-Date: 2026-04-19 01:20+0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -64,6 +64,10 @@ msgstr ""
 msgid "Built-in Display"
 msgstr ""
 
+#: src/controlCenter/widgets/backlight/backlight.vala:168
+msgid "Keyboard"
+msgstr ""
+
 #: src/controlCenter/widgets/quickSettings/tiles/dndTile.vala:5
 msgid "Do Not Disturb"
 msgstr ""
@@ -179,7 +183,7 @@ msgstr ""
 msgid "No Notifications"
 msgstr ""
 
-#: data/ui/widgets/backlight.blp:44
+#: data/ui/widgets/backlight.blp:42
 msgid "Brightness"
 msgstr ""
 

src/controlCenter/widgets/backlight/backlight.vala

@@ -163,6 +163,10 @@ namespace XimperShellNotificationCenter.Widgets {
             if (src.is_internal) {
                 return _("Built-in Display");
             }
+            if (src.icon_name
+                    == "keyboard-brightness-symbolic") {
+                return _("Keyboard");
+            }
             return prettify_source_name (src.tooltip);
         }
 
@@ -399,12 +403,43 @@ namespace XimperShellNotificationCenter.Widgets {
             header.append (name_label);
             outer.append (header);
 
+            unowned BrightnessSource src = all_sources[index];
+            bool is_kbd = src.icon_name
+                == "keyboard-brightness-symbolic";
+            int max = src.sysfs != null
+                ? src.sysfs.get_max_value () : 100;
+            double step = is_kbd && max > 0 && max <= 20
+                ? 100.0 / max : 1.0;
+
             var scl = new Gtk.Scale.with_range (
                 Gtk.Orientation.HORIZONTAL,
-                min_brightness, 100, 1);
+                min_brightness, 100, step);
             scl.set_draw_value (false);
             scl.set_round_digits (0);
             scl.set_hexpand (true);
+
+            if (is_kbd && max > 0 && max <= 20) {
+                for (int i = 0; i <= max; i++) {
+                    scl.add_mark (
+                        i * 100.0 / max,
+                        Gtk.PositionType.BOTTOM, null);
+                }
+                int snap_max = max;
+                bool snapping = false;
+                scl.value_changed.connect (() => {
+                    if (snapping) return;
+                    double v = scl.get_value ();
+                    double snapped =
+                        Math.round (v * snap_max / 100.0)
+                        * 100.0 / snap_max;
+                    if (v != snapped) {
+                        snapping = true;
+                        scl.set_value (snapped);
+                        snapping = false;
+                    }
+                });
+            }
+
             outer.append (scl);
 
             connect_source_scale (index, scl);

src/controlCenter/widgets/backlight/backlightUtil.vala

@@ -82,12 +82,8 @@ namespace XimperShellNotificationCenter.Widgets {
 
         public async void set_brightness (float percent) {
             this.close ();
-            if (subsystem == "backlight") {
-                int actual = calc_actual (percent);
-                login1.set_brightness.begin (subsystem, device, actual);
-            } else {
-                login1.set_brightness.begin (subsystem, device, (uint32) percent);
-            }
+            int actual = calc_actual (percent);
+            login1.set_brightness.begin (subsystem, device, actual);
             connect_monitor ();
         }
 
@@ -96,12 +92,8 @@ namespace XimperShellNotificationCenter.Widgets {
             try {
                 var dis = new DataInputStream (fd.read (null));
                 string data = dis.read_line (null);
-                if (subsystem == "backlight") {
-                    int val = calc_percent (int.parse (data));
-                    this.brightness_change (val);
-                } else {
-                    this.brightness_change (int.parse (data));
-                }
+                int val = calc_percent (int.parse (data));
+                this.brightness_change (val);
             } catch (Error e) {
                 critical ("Error %s\n", e.message);
             }