f45ccc9143
The module exports a `addObjectSignalMethods()` method that extends
the provided prototype with `connectObject()` and `disconnectObject()`
methods.
In its simplest form, `connectObject()` looks like the regular
`connect()` method, except for an additional parameter:
```js
this._button.connectObject('clicked',
() => this._onButtonClicked(), this);
```
The additional object can be used to disconnect all handlers on the
instance that were connected with that object, similar to
`g_signal_handlers_disconnect_by_data()` (which cannot be used
from introspection).
For objects that are subclasses of Clutter.Actor, that will happen
automatically when the actor is destroyed, similar to
`g_signal_connect_object()`.
Finally, `connectObject()` allows to conveniently connect multiple
signals at once, similar to `g_object_connect()`:
```js
this._toggleButton.connect(
'clicked', () => this._onClicked(),
'notify::checked', () => this._onChecked(), this);
```
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1953>
80 lines
1.7 KiB
JavaScript
80 lines
1.7 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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// Test cases for version comparison
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const { GObject } = imports.gi;
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const JsUnit = imports.jsUnit;
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const Signals = imports.signals;
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const Environment = imports.ui.environment;
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Environment.init();
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const Destroyable = GObject.registerClass({
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Signals: { 'destroy': {} },
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}, class Destroyable extends GObject.Object {});
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class PlainEmitter {}
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Signals.addSignalMethods(PlainEmitter.prototype);
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const GObjectEmitter = GObject.registerClass({
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Signals: { 'signal': {} },
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}, class GObjectEmitter extends Destroyable {});
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const emitter1 = new PlainEmitter();
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const emitter2 = new GObjectEmitter();
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const tracked1 = new Destroyable();
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const tracked2 = {};
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let count = 0;
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const handler = () => count++;
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emitter1.connectObject('signal', handler, tracked1);
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emitter2.connectObject('signal', handler, tracked1);
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emitter1.connectObject('signal', handler, tracked2);
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emitter2.connectObject('signal', handler, tracked2);
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JsUnit.assertEquals(count, 0);
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emitter1.emit('signal');
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emitter2.emit('signal');
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JsUnit.assertEquals(count, 4);
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tracked1.emit('destroy');
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emitter1.emit('signal');
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emitter2.emit('signal');
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JsUnit.assertEquals(count, 6);
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emitter1.disconnectObject(tracked2);
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emitter2.emit('destroy');
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emitter1.emit('signal');
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emitter2.emit('signal');
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JsUnit.assertEquals(count, 6);
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emitter1.connectObject(
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'signal', handler,
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'signal', handler, GObject.ConnectFlags.AFTER,
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tracked1);
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emitter2.connectObject(
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'signal', handler,
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'signal', handler, GObject.ConnectFlags.AFTER,
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tracked1);
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emitter1.emit('signal');
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emitter2.emit('signal');
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JsUnit.assertEquals(count, 10);
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tracked1.emit('destroy');
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emitter1.emit('signal');
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emitter2.emit('signal');
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JsUnit.assertEquals(count, 10);
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