Ruby applet dataEngine service operation call

[Richard Dale]

On Sat, Dec 12, 2009 at 3:58 PM, Cédric <kde at xfou.com> wrote:
>
> Hi richard,
>
> Do you think this is corrected now and if it is in which release will it be
> available ?
No, i'm afraid the code generated by the new smoke bindings generator
is the same as the old one:

    void x_12(Smoke::Stack x) {
        // virtual Plasma::Service* serviceForSource(const QString&)
        Plasma::Service* xret =
this->Plasma::DataEngine::serviceForSource(*(const
QString*)x[1].s_class);
        x[0].s_class = (void*)xret;
    }

It is difficult to allow virtual methods to be overriden in a bindings
language, at the same time as allowing dynamic despatch for virtual
methods on unknown classes. I'll cc this mail to kde-bindings at kde.org
and maybe we can discuss it there.

-- Richard
>>
>> On Tue, Aug 18, 2009 at 2:59 PM, Richard Dale <richard.j.dale at gmail.com>
>> wrote:
>>>
>>> On Tue, Aug 18, 2009 at 1:45 PM, Cédric<kde at xfou.com> wrote:
>>> > Thanks Richard,
>>> >
>>> > That seems to be the problem.
>>> > What I was telling in my earlier mail is that the javascript binding
>>> > seems
>>> > to have a similar problem with plasmoid.dataEngine("engine
>>> > name").serviceForSource("source name") and maybe they solved it by
>>> > implementing the service function: plasmoid.service("engine name",
>>> > "source
>>> > name") (and method Plasma::Applet#service is not implemented in ruby )
>>> > .
>>> >
>>> I found the problem. It is a bug in how the smoke library works with
>>> overriden virtual methods in classes that are don't have bindings
>>> generated for them. In this case the 'TasksEngine' class isn't part of
>>> the bindings, and when the serviceForSource() method is called on the
>>> DataEngine, the code to invoke it looks like this:
>>>
>>>    void x_10(Smoke::Stack x) {
>>>        // serviceForSource(const QString&)
>>>        Plasma::Service* xret =
>>> this->Plasma::DataEngine::serviceForSource(*(const QString
>>> *)x[1].s_voidp);
>>>        x[0].s_class = (void*)xret;
>>>    }
>>>
>>> When it should probably look like this, and invoke the method in the
>>> TasksEngine class:
>>>
>>>    void x_10(Smoke::Stack x) {
>>>        // serviceForSource(const QString&)
>>>        Plasma::Service* xret = this->serviceForSource(*(const QString
>>> *)x[1].s_voidp);
>>>        x[0].s_class = (void*)xret;
>>>    }
>>>
>>> Arno Rehn has just written a new smoke library bindings generator, and
>>> I think we need to discuss this issue and see if we can fix it in that
>>> tool.
>>>
>>> -- Richard
>>> _______________________________________________
>>> Plasma-devel mailing list
>>> Plasma-devel at kde.org
>>> https://mail.kde.org/mailman/listinfo/plasma-devel
>>
>
>
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