gnome-shell/js/ui/osdWindow.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const St = imports.gi.St;
const Lang = imports.lang;
const Layout = imports.ui.layout;
const Main = imports.ui.main;
const Mainloop = imports.mainloop;
const Tweener = imports.ui.tweener;
const HIDE_TIMEOUT = 1500;
const FADE_TIME = 0.1;
const LEVEL_ANIMATION_TIME = 0.1;
const LevelBar = new Lang.Class({
Name: 'LevelBar',
_init: function() {
this._level = 0;
this.actor = new St.Bin({ style_class: 'level',
x_fill: true, y_fill: true });
this._bar = new St.DrawingArea();
this._bar.connect('repaint', Lang.bind(this, this._repaint));
this.actor.set_child(this._bar);
},
get level() {
return this._level;
},
set level(value) {
let newValue = Math.max(0, Math.min(value, 100));
if (newValue == this._level)
return;
this._level = newValue;
this._bar.queue_repaint();
},
_repaint: function() {
let cr = this._bar.get_context();
let node = this.actor.get_theme_node();
let radius = node.get_border_radius(0); // assume same radius for all corners
Clutter.cairo_set_source_color(cr, node.get_foreground_color());
let [w, h] = this._bar.get_surface_size();
w *= (this._level / 100.);
if (w == 0)
return;
cr.moveTo(radius, 0);
if (w >= radius)
cr.arc(w - radius, radius, radius, 1.5 * Math.PI, 2. * Math.PI);
else
cr.lineTo(w, 0);
if (w >= radius)
cr.arc(w - radius, h - radius, radius, 0, 0.5 * Math.PI);
else
cr.lineTo(w, h);
cr.arc(radius, h - radius, radius, 0.5 * Math.PI, Math.PI);
cr.arc(radius, radius, radius, Math.PI, 1.5 * Math.PI);
cr.fill();
}
});
const OsdWindow = new Lang.Class({
Name: 'OsdWindow',
_init: function() {
this.actor = new St.Widget({ x_expand: true,
y_expand: true,
x_align: Clutter.ActorAlign.CENTER,
y_align: Clutter.ActorAlign.CENTER });
this.actor.add_constraint(new Layout.MonitorConstraint({ primary: true }));
this._box = new St.BoxLayout({ style_class: 'osd-window',
vertical: true });
this.actor.add_actor(this._box);
this._icon = new St.Icon();
this._box.add(this._icon, { expand: true });
this._label = new St.Label();
this._box.add(this._label);
this._level = new LevelBar();
this._box.add(this._level.actor);
this._hideTimeoutId = 0;
this._reset();
Main.layoutManager.connect('monitors-changed',
Lang.bind(this, this._monitorsChanged));
this._monitorsChanged();
Main.layoutManager.addChrome(this.actor, { affectsInputRegion: false });
},
setIcon: function(icon) {
this._icon.gicon = icon;
},
setLabel: function(label) {
this._label.visible = (label != undefined);
if (label)
this._label.text = label;
},
setLevel: function(level) {
this._level.actor.visible = (level != undefined);
if (this.actor.visible)
Tweener.addTween(this._level,
{ level: level,
time: LEVEL_ANIMATION_TIME,
transition: 'easeOutQuad' });
else
this._level.level = level;
},
show: function() {
if (!this._icon.gicon)
return;
if (!this.actor.visible) {
this.actor.show();
this.actor.opacity = 0;
Tweener.addTween(this.actor,
{ opacity: 255,
time: FADE_TIME,
transition: 'easeOutQuad' });
}
if (this._hideTimeoutId)
Mainloop.source_remove(this._hideTimeoutId);
this._hideTimeoutId = Mainloop.timeout_add(HIDE_TIMEOUT,
Lang.bind(this, this._hide));
},
cancel: function() {
if (!this._hideTimeoutId)
return;
Mainloop.source_remove(this._hideTimeoutId);
this._hideTimeoutId = 0;
this._hide();
},
_hide: function() {
Tweener.addTween(this.actor,
{ opacity: 0,
time: FADE_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, this._reset) });
},
_reset: function() {
this.actor.hide();
this.setLabel(null);
this.setLevel(null);
},
_monitorsChanged: function() {
/* assume 110x110 on a 640x480 display and scale from there */
let monitor = Main.layoutManager.primaryMonitor;
let scalew = monitor.width / 640.0;
let scaleh = monitor.height / 480.0;
let scale = Math.min(scalew, scaleh);
let size = 110 * Math.max(1, scale);
this._box.set_size(size, size);
this._box.translation_y = monitor.height / 4;
this._icon.icon_size = size / 2;
}
});