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

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// -*- 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");
const 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);
}
});