gnome-shell/js/ui/status/brightness.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Lang = imports.lang;
const Gio = imports.gi.Gio;
const St = imports.gi.St;
const PanelMenu = imports.ui.panelMenu;
const PopupMenu = imports.ui.popupMenu;
const Slider = imports.ui.slider;
const BUS_NAME = 'org.gnome.SettingsDaemon.Power';
const OBJECT_PATH = '/org/gnome/SettingsDaemon/Power';
const BrightnessInterface = <interface name="org.gnome.SettingsDaemon.Power.Screen">
<property name='Brightness' type='i' access='readwrite'/>
</interface>;
const BrightnessProxy = Gio.DBusProxy.makeProxyWrapper(BrightnessInterface);
const Indicator = new Lang.Class({
Name: 'BrightnessIndicator',
Extends: PanelMenu.SystemIndicator,
_init: function() {
this.parent('display-brightness-symbolic');
this._proxy = new BrightnessProxy(Gio.DBus.session, BUS_NAME, OBJECT_PATH,
Lang.bind(this, function(proxy, error) {
if (error) {
log(error.message);
return;
}
this._proxy.connect('g-properties-changed', Lang.bind(this, this._sync));
this._sync();
}));
this._item = new PopupMenu.PopupBaseMenuItem({ activate: false });
this.menu.addMenuItem(this._item);
this._slider = new Slider.Slider(0);
this._slider.connect('value-changed', Lang.bind(this, this._sliderChanged));
this._slider.actor.accessible_name = _("Brightness");
let icon = new St.Icon({ icon_name: 'display-brightness-symbolic',
style_class: 'popup-menu-icon' });
this._item.actor.add(icon);
this._item.actor.add(this._slider.actor, { expand: true });
this._item.actor.connect('button-press-event', Lang.bind(this, function(actor, event) {
this._slider.startDragging(event);
}));
this._item.actor.connect('key-press-event', Lang.bind(this, function(actor, event) {
return this._slider.onKeyPressEvent(actor, event);
}));
},
_sliderChanged: function(slider, value) {
let percent = value * 100;
this._proxy.Brightness = percent;
},
_sync: function() {
let visible = this._proxy.Brightness >= 0;
this._item.actor.visible = visible;
if (visible)
this._slider.setValue(this._proxy.Brightness / 100.0);
},
});