gnome-shell/js/ui/panelMenu.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const St = imports.gi.St;
const Atk = imports.gi.Atk;
const Main = imports.ui.main;
const Params = imports.misc.params;
const PopupMenu = imports.ui.popupMenu;
const ButtonBox = new Lang.Class({
Name: 'ButtonBox',
_init: function(params) {
params = Params.parse(params, { style_class: 'panel-button' }, true);
this.actor = new Shell.GenericContainer(params);
this.actor._delegate = this;
this.actor.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this.actor.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this.actor.connect('allocate', Lang.bind(this, this._allocate));
this.actor.connect('style-changed', Lang.bind(this, this._onStyleChanged));
this._minHPadding = this._natHPadding = 0.0;
},
_onStyleChanged: function(actor) {
let themeNode = actor.get_theme_node();
this._minHPadding = themeNode.get_length('-minimum-hpadding');
this._natHPadding = themeNode.get_length('-natural-hpadding');
},
_getPreferredWidth: function(actor, forHeight, alloc) {
let children = actor.get_children();
let child = children.length > 0 ? children[0] : null;
if (child) {
[alloc.min_size, alloc.natural_size] = child.get_preferred_width(-1);
} else {
alloc.min_size = alloc.natural_size = 0;
}
alloc.min_size += 2 * this._minHPadding;
alloc.natural_size += 2 * this._natHPadding;
},
_getPreferredHeight: function(actor, forWidth, alloc) {
let children = actor.get_children();
let child = children.length > 0 ? children[0] : null;
if (child) {
[alloc.min_size, alloc.natural_size] = child.get_preferred_height(-1);
} else {
alloc.min_size = alloc.natural_size = 0;
}
},
_allocate: function(actor, box, flags) {
let children = actor.get_children();
if (children.length == 0)
return;
let child = children[0];
let [minWidth, natWidth] = child.get_preferred_width(-1);
let [minHeight, natHeight] = child.get_preferred_height(-1);
let availWidth = box.x2 - box.x1;
let availHeight = box.y2 - box.y1;
let childBox = new Clutter.ActorBox();
if (natWidth + 2 * this._natHPadding <= availWidth) {
childBox.x1 = this._natHPadding;
childBox.x2 = availWidth - this._natHPadding;
} else {
childBox.x1 = this._minHPadding;
childBox.x2 = availWidth - this._minHPadding;
}
if (natHeight <= availHeight) {
childBox.y1 = Math.floor((availHeight - natHeight) / 2);
childBox.y2 = childBox.y1 + natHeight;
} else {
childBox.y1 = 0;
childBox.y2 = availHeight;
}
child.allocate(childBox, flags);
},
});
const Button = new Lang.Class({
Name: 'PanelMenuButton',
Extends: ButtonBox,
_init: function(menuAlignment, nameText, dontCreateMenu) {
this.parent({ reactive: true,
can_focus: true,
track_hover: true,
accessible_role: Atk.Role.MENU });
this.actor.connect('button-press-event', Lang.bind(this, this._onButtonPress));
this.actor.connect('key-press-event', Lang.bind(this, this._onSourceKeyPress));
if (dontCreateMenu)
this.menu = null;
else
this.setMenu(new PopupMenu.PopupMenu(this.actor, menuAlignment, St.Side.TOP, 0));
this.setName(nameText);
},
setName: function(text) {
if (text != null) {
// This is the easiest way to provide a accessible name to
// this widget. The label could be also used for other
// purposes in the future.
if (!this.label) {
this.label = new St.Label({ text: text });
this.actor.label_actor = this.label;
} else
this.label.text = text;
} else {
this.label = null;
this.actor.label_actor = null;
}
},
setMenu: function(menu) {
if (this.menu)
this.menu.destroy();
this.menu = menu;
if (this.menu) {
this.menu.actor.add_style_class_name('panel-menu');
this.menu.connect('open-state-changed', Lang.bind(this, this._onOpenStateChanged));
this.menu.actor.connect('key-press-event', Lang.bind(this, this._onMenuKeyPress));
Main.uiGroup.add_actor(this.menu.actor);
this.menu.actor.hide();
}
},
setLockedState: function(locked) {
// default behaviour is to hide completely
if (locked)
this.menu.close();
this.actor.visible = !locked;
},
_onButtonPress: function(actor, event) {
if (!this.menu)
return;
this.menu.toggle();
},
_onSourceKeyPress: function(actor, event) {
if (!this.menu)
return false;
let symbol = event.get_key_symbol();
if (symbol == Clutter.KEY_space || symbol == Clutter.KEY_Return) {
this.menu.toggle();
return true;
} else if (symbol == Clutter.KEY_Escape && this.menu.isOpen) {
this.menu.close();
return true;
} else if (symbol == Clutter.KEY_Down) {
if (!this.menu.isOpen)
this.menu.toggle();
this.menu.actor.navigate_focus(this.actor, Gtk.DirectionType.DOWN, false);
return true;
} else
return false;
},
_onMenuKeyPress: function(actor, event) {
let symbol = event.get_key_symbol();
if (symbol == Clutter.KEY_Left || symbol == Clutter.KEY_Right) {
let focusManager = St.FocusManager.get_for_stage(global.stage);
let group = focusManager.get_group(this.actor);
if (group) {
let direction = (symbol == Clutter.KEY_Left) ? Gtk.DirectionType.LEFT : Gtk.DirectionType.RIGHT;
group.navigate_focus(this.actor, direction, false);
return true;
}
}
return false;
},
_onOpenStateChanged: function(menu, open) {
if (open)
this.actor.add_style_pseudo_class('active');
else
this.actor.remove_style_pseudo_class('active');
// Setting the max-height won't do any good if the minimum height of the
// menu is higher then the screen; it's useful if part of the menu is
// scrollable so the minimum height is smaller than the natural height
let monitor = Main.layoutManager.primaryMonitor;
this.menu.actor.style = ('max-height: ' +
Math.round(monitor.height - Main.panel.actor.height) +
'px;');
},
destroy: function() {
this.actor._delegate = null;
this.menu.destroy();
this.actor.destroy();
this.emit('destroy');
}
});
Signals.addSignalMethods(Button.prototype);
/* SystemStatusButton:
*
* This class manages one System Status indicator (network, keyboard,
* volume, bluetooth...), which is just a PanelMenuButton with an
* icon.
*/
const SystemStatusButton = new Lang.Class({
Name: 'SystemStatusButton',
Extends: Button,
_init: function(iconName, nameText) {
this.parent(0.0, nameText);
this._iconActor = new St.Icon({ icon_name: iconName,
icon_type: St.IconType.SYMBOLIC,
style_class: 'system-status-icon' });
this.actor.add_actor(this._iconActor);
this.actor.add_style_class_name('panel-status-button');
},
setIcon: function(iconName) {
this._iconActor.icon_name = iconName;
},
setGIcon: function(gicon) {
this._iconActor.gicon = gicon;
}
});