gnome-shell/js/ui/modalDialog.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gdk = imports.gi.Gdk;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Pango = imports.gi.Pango;
const St = imports.gi.St;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const Atk = imports.gi.Atk;
const Params = imports.misc.params;
const Layout = imports.ui.layout;
const Lightbox = imports.ui.lightbox;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;
const OPEN_AND_CLOSE_TIME = 0.1;
const FADE_OUT_DIALOG_TIME = 1.0;
const State = {
OPENED: 0,
CLOSED: 1,
OPENING: 2,
CLOSING: 3,
FADED_OUT: 4
};
const ModalDialog = new Lang.Class({
Name: 'ModalDialog',
_init: function(params) {
params = Params.parse(params, { shellReactive: false,
styleClass: null,
actionMode: Shell.ActionMode.SYSTEM_MODAL,
shouldFadeIn: true,
shouldFadeOut: true,
destroyOnClose: true });
this.state = State.CLOSED;
this._hasModal = false;
this._actionMode = params.actionMode;
this._shellReactive = params.shellReactive;
this._shouldFadeIn = params.shouldFadeIn;
this._shouldFadeOut = params.shouldFadeOut;
this._destroyOnClose = params.destroyOnClose;
this._group = new St.Widget({ visible: false,
x: 0,
y: 0,
accessible_role: Atk.Role.DIALOG });
Main.layoutManager.modalDialogGroup.add_actor(this._group);
let constraint = new Clutter.BindConstraint({ source: global.stage,
coordinate: Clutter.BindCoordinate.ALL });
this._group.add_constraint(constraint);
this._group.connect('destroy', Lang.bind(this, this._onGroupDestroy));
this._pressedKey = null;
this._buttonKeys = {};
this._group.connect('key-press-event', Lang.bind(this, this._onKeyPressEvent));
this._group.connect('key-release-event', Lang.bind(this, this._onKeyReleaseEvent));
this.backgroundStack = new St.Widget({ layout_manager: new Clutter.BinLayout() });
this._backgroundBin = new St.Bin({ child: this.backgroundStack,
x_fill: true, y_fill: true });
this._monitorConstraint = new Layout.MonitorConstraint();
this._backgroundBin.add_constraint(this._monitorConstraint);
this._group.add_actor(this._backgroundBin);
this.dialogLayout = new St.BoxLayout({ style_class: 'modal-dialog',
x_align: Clutter.ActorAlign.CENTER,
y_align: Clutter.ActorAlign.CENTER,
vertical: true });
// modal dialogs are fixed width and grow vertically; set the request
// mode accordingly so wrapped labels are handled correctly during
// size requests.
this.dialogLayout.request_mode = Clutter.RequestMode.HEIGHT_FOR_WIDTH;
if (params.styleClass != null)
this.dialogLayout.add_style_class_name(params.styleClass);
if (!this._shellReactive) {
this._lightbox = new Lightbox.Lightbox(this._group,
{ inhibitEvents: true,
radialEffect: true });
this._lightbox.highlight(this._backgroundBin);
this._eventBlocker = new Clutter.Actor({ reactive: true });
this.backgroundStack.add_actor(this._eventBlocker);
}
this.backgroundStack.add_actor(this.dialogLayout);
this.contentLayout = new St.BoxLayout({ vertical: true,
style_class: "modal-dialog-content-box" });
this.dialogLayout.add(this.contentLayout,
{ expand: true,
x_fill: true,
y_fill: true,
x_align: St.Align.MIDDLE,
y_align: St.Align.START });
this.buttonLayout = new St.Widget ({ layout_manager: new Clutter.BoxLayout ({ homogeneous:true }) });
this.dialogLayout.add(this.buttonLayout,
{ x_align: St.Align.MIDDLE,
y_align: St.Align.END });
global.focus_manager.add_group(this.dialogLayout);
this._initialKeyFocus = this.dialogLayout;
this._initialKeyFocusDestroyId = 0;
this._savedKeyFocus = null;
},
destroy: function() {
this._group.destroy();
},
clearButtons: function() {
this.buttonLayout.destroy_all_children();
this._buttonKeys = {};
},
setButtons: function(buttons) {
this.clearButtons();
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for (let i = 0; i < buttons.length; i++) {
let buttonInfo = buttons[i];
let x_alignment;
if (buttons.length == 1)
x_alignment = St.Align.END;
else if (i == 0)
x_alignment = St.Align.START;
else if (i == buttons.length - 1)
x_alignment = St.Align.END;
else
x_alignment = St.Align.MIDDLE;
this.addButton(buttonInfo);
}
},
addButton: function(buttonInfo) {
let label = buttonInfo['label']
let action = buttonInfo['action'];
let key = buttonInfo['key'];
let isDefault = buttonInfo['default'];
let keys;
if (key)
keys = [key];
else if (isDefault)
keys = [Clutter.KEY_Return, Clutter.KEY_KP_Enter, Clutter.KEY_ISO_Enter];
else
keys = [];
let button = new St.Button({ style_class: 'modal-dialog-linked-button',
button_mask: St.ButtonMask.ONE | St.ButtonMask.THREE,
reactive: true,
can_focus: true,
x_expand: true,
y_expand: true,
label: label });
button.connect('clicked', action);
buttonInfo['button'] = button;
if (isDefault)
button.add_style_pseudo_class('default');
if (!this._initialKeyFocusDestroyId)
this._initialKeyFocus = button;
for (let i in keys)
this._buttonKeys[keys[i]] = buttonInfo;
this.buttonLayout.add_actor(button);
return button;
},
_onKeyPressEvent: function(object, event) {
this._pressedKey = event.get_key_symbol();
return Clutter.EVENT_PROPAGATE;
},
_onKeyReleaseEvent: function(object, event) {
let pressedKey = this._pressedKey;
this._pressedKey = null;
let symbol = event.get_key_symbol();
if (symbol != pressedKey)
return Clutter.EVENT_PROPAGATE;
let buttonInfo = this._buttonKeys[symbol];
if (!buttonInfo)
return Clutter.EVENT_PROPAGATE;
let button = buttonInfo['button'];
let action = buttonInfo['action'];
if (action && button.reactive) {
action();
return Clutter.EVENT_STOP;
}
return Clutter.EVENT_PROPAGATE;
},
_onGroupDestroy: function() {
this.emit('destroy');
},
_fadeOpen: function(onPrimary) {
if (onPrimary)
this._monitorConstraint.primary = true;
else
this._monitorConstraint.index = global.screen.get_current_monitor();
this.state = State.OPENING;
this.dialogLayout.opacity = 255;
if (this._lightbox)
this._lightbox.show();
this._group.opacity = 0;
this._group.show();
Tweener.addTween(this._group,
{ opacity: 255,
time: this._shouldFadeIn ? OPEN_AND_CLOSE_TIME : 0,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this.state = State.OPENED;
this.emit('opened');
})
});
},
setInitialKeyFocus: function(actor) {
if (this._initialKeyFocusDestroyId)
this._initialKeyFocus.disconnect(this._initialKeyFocusDestroyId);
this._initialKeyFocus = actor;
this._initialKeyFocusDestroyId = actor.connect('destroy', Lang.bind(this, function() {
this._initialKeyFocus = this.dialogLayout;
this._initialKeyFocusDestroyId = 0;
}));
},
open: function(timestamp, onPrimary) {
if (this.state == State.OPENED || this.state == State.OPENING)
return true;
if (!this.pushModal({ timestamp: timestamp }))
return false;
this._fadeOpen(onPrimary);
return true;
},
_closeComplete: function() {
this.state = State.CLOSED;
this._group.hide();
this.emit('closed');
if (this._destroyOnClose)
this.destroy();
},
close: function(timestamp) {
if (this.state == State.CLOSED || this.state == State.CLOSING)
return;
this.state = State.CLOSING;
this.popModal(timestamp);
this._savedKeyFocus = null;
if (this._shouldFadeOut)
Tweener.addTween(this._group,
{ opacity: 0,
time: OPEN_AND_CLOSE_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
this._closeComplete)
})
else
this._closeComplete();
},
// Drop modal status without closing the dialog; this makes the
// dialog insensitive as well, so it needs to be followed shortly
// by either a close() or a pushModal()
popModal: function(timestamp) {
if (!this._hasModal)
return;
let focus = global.stage.key_focus;
if (focus && this._group.contains(focus))
this._savedKeyFocus = focus;
else
this._savedKeyFocus = null;
Main.popModal(this._group, timestamp);
global.gdk_screen.get_display().sync();
this._hasModal = false;
if (!this._shellReactive)
this._eventBlocker.raise_top();
},
pushModal: function (timestamp) {
if (this._hasModal)
return true;
if (!Main.pushModal(this._group, { timestamp: timestamp,
actionMode: this._actionMode }))
return false;
this._hasModal = true;
if (this._savedKeyFocus) {
this._savedKeyFocus.grab_key_focus();
this._savedKeyFocus = null;
} else {
this._initialKeyFocus.grab_key_focus();
}
if (!this._shellReactive)
this._eventBlocker.lower_bottom();
return true;
},
// This method is like close, but fades the dialog out much slower,
// and leaves the lightbox in place. Once in the faded out state,
// the dialog can be brought back by an open call, or the lightbox
// can be dismissed by a close call.
//
// The main point of this method is to give some indication to the user
// that the dialog reponse has been acknowledged but will take a few
// moments before being processed.
// e.g., if a user clicked "Log Out" then the dialog should go away
// imediately, but the lightbox should remain until the logout is
// complete.
_fadeOutDialog: function(timestamp) {
if (this.state == State.CLOSED || this.state == State.CLOSING)
return;
if (this.state == State.FADED_OUT)
return;
this.popModal(timestamp);
Tweener.addTween(this.dialogLayout,
{ opacity: 0,
time: FADE_OUT_DIALOG_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this.state = State.FADED_OUT;
})
});
}
});
Signals.addSignalMethods(ModalDialog.prototype);