2014-07-08 19:02 GMT+02:00 Dimitri Giardina <[email protected]>:
> Il giorno lun, 07/07/2014 alle 17.50 +0100, Emmanuele Bassi ha scritto:
>> hi;
>>
>> to define new signals, you need to use the `Signals` key in object you
>> pass to the Lang.Class() constructor you use when subclassing a
>> GObject.
> ok, i've resolved in this way, it's equivalent?
>
> const WebBrowserTabLabel = new Lang.Class({
> Name: 'WebBrowserTabLabel',
> Extends: Gtk.Box,
> _init: function() {
> this.parent();
> Signals.addSignalMethods(WebBrowserTabLabel.prototype);
> [...]
> button.connect("clicked", this.buttonClick);
> this.pack_start(button, false, false, 0);
> this.show_all();
> },
> clickClose: function() {},
> buttonClick: function(self, button, data) {
> self.p.emit('close-clicked');
> },
> });
>
> what's the difference using Signals property and
> Signals.addSignalMethods?
If you use Signals.addSignalMethods, you lose all GObject signals and
only see the JS ones. Not what you want, probably.
> without the Singals.addSignalMethods, the interpreter tell me that the
> Gtk.Box haven't the signal 'close-clicked' (it's normal, i know).
Try with
const WebBrowserTabLabel = new Lang.Class({
Name: 'WebBrowserTabLabel',
Extends: Gtk.Box,
Signals: { 'close-clicked': { } }
_init: function() {
this.parent();
button.connect("clicked", Lang.bind(this, this.buttonClick));
this.pack_start(button, false, false, 0);
this.show_all();
},
clickClose: function() {},
buttonClick: function(button) {
this.emit('close-clicked');
},
});
See https://people.gnome.org/~gcampagna/docs/GObject-2.0/GObject.Class.html
for a description of how GObject.Class works (or Lang.Class, they're
equivalent if you specify Extends)
Btw, you should always use Lang.bind() to have "this" properly set in callbacks.
Giovanni
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