1 files changed, 73 insertions, 0 deletions
diff --git a/js/ui/status/brightness.js b/js/ui/status/brightness.js
new file mode 100644
index 0000000..1724788
--- /dev/null
+++ b/js/ui/status/brightness.js
@@ -0,0 +1,73 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported Indicator */
+
+const { Gio, GObject, St } = imports.gi;
+
+const PanelMenu = imports.ui.panelMenu;
+const PopupMenu = imports.ui.popupMenu;
+const Slider = imports.ui.slider;
+
+const { loadInterfaceXML } = imports.misc.fileUtils;
+
+const BUS_NAME = 'org.gnome.SettingsDaemon.Power';
+const OBJECT_PATH = '/org/gnome/SettingsDaemon/Power';
+
+const BrightnessInterface = loadInterfaceXML('org.gnome.SettingsDaemon.Power.Screen');
+const BrightnessProxy = Gio.DBusProxy.makeProxyWrapper(BrightnessInterface);
+
+var Indicator = GObject.registerClass(
+class Indicator extends PanelMenu.SystemIndicator {
+    _init() {
+        super._init();
+        this._proxy = new BrightnessProxy(Gio.DBus.session, BUS_NAME, OBJECT_PATH,
+                                          (proxy, error) => {
+                                              if (error) {
+                                                  log(error.message);
+                                                  return;
+                                              }
+
+                                              this._proxy.connect('g-properties-changed', this._sync.bind(this));
+                                              this._sync();
+                                          });
+
+        this._item = new PopupMenu.PopupBaseMenuItem({ activate: false });
+        this.menu.addMenuItem(this._item);
+
+        this._slider = new Slider.Slider(0);
+        this._sliderChangedId = this._slider.connect('notify::value',
+            this._sliderChanged.bind(this));
+        this._slider.accessible_name = _("Brightness");
+
+        let icon = new St.Icon({ icon_name: 'display-brightness-symbolic',
+                                 style_class: 'popup-menu-icon' });
+        this._item.add(icon);
+        this._item.add_child(this._slider);
+        this._item.connect('button-press-event', (actor, event) => {
+            return this._slider.startDragging(event);
+        });
+        this._item.connect('key-press-event', (actor, event) => {
+            return this._slider.emit('key-press-event', event);
+        });
+        this._item.connect('scroll-event', (actor, event) => {
+            return this._slider.emit('scroll-event', event);
+        });
+    }
+
+    _sliderChanged() {
+        let percent = this._slider.value * 100;
+        this._proxy.Brightness = percent;
+    }
+
+    _changeSlider(value) {
+        this._slider.block_signal_handler(this._sliderChangedId);
+        this._slider.value = value;
+        this._slider.unblock_signal_handler(this._sliderChangedId);
+    }
+
+    _sync() {
+        let visible = this._proxy.Brightness >= 0;
+        this._item.visible = visible;
+        if (visible)
+            this._changeSlider(this._proxy.Brightness / 100.0);
+    }
+});