<![CDATA[How can i log all executions of QAction?]]>In our application we want to log all QAction executions to a log file. All Commands are called using QAction objects, and using that we would be able to reconstruct what a user did.
I originally wanted to extend QAction with a own class and just overload the triggered method, but this method is not virtual as most others of QAction.

I then tried to add signals following this approach here
https://stackoverflow.com/questions/70064468/list-all-signals-emitted-from-qt-application/70066122#70066122

But i am unable to get the calling QAction Element.
Is there a way to do this without adding code to each command we implemented?

]]>https://forum.qt.io/topic/139613/how-can-i-log-all-executions-of-qactionRSS for NodeThu, 05 Nov 2026 05:26:43 GMTTue, 27 Sep 2022 14:09:36 GMT60<![CDATA[Reply to How can i log all executions of QAction? on Wed, 28 Sep 2022 10:27:48 GMT]]>Ah, it works that way:

connect(this, &QAction::triggered, this, &MyAction::onTriggered);

If do that in the constructor ill have to overload all 3 different ctors - but yes that would probably work to.

]]>https://forum.qt.io/post/730470https://forum.qt.io/post/730470Wed, 28 Sep 2022 10:27:48 GMT<![CDATA[Reply to How can i log all executions of QAction? on Wed, 28 Sep 2022 06:36:57 GMT]]>@jsulm Nothing i tried compiled, but i may have done it wrong Thats not important for me. The solution seems to work. Thats important.

]]>https://forum.qt.io/post/730462https://forum.qt.io/post/730462Wed, 28 Sep 2022 06:36:57 GMT<![CDATA[Reply to How can i log all executions of QAction? on Wed, 28 Sep 2022 05:37:07 GMT]]>@stefanwoe said in How can i log all executions of QAction?:

but i failed on this

Why? What happened and how exactly did you try?

]]>https://forum.qt.io/post/730449https://forum.qt.io/post/730449Wed, 28 Sep 2022 05:37:07 GMT<![CDATA[Reply to How can i log all executions of QAction? on Wed, 28 Sep 2022 05:35:15 GMT]]>@mchinand N0, i tried, but i failed on this.

]]>https://forum.qt.io/post/730447https://forum.qt.io/post/730447Wed, 28 Sep 2022 05:35:15 GMT<![CDATA[Reply to How can i log all executions of QAction? on Tue, 27 Sep 2022 21:05:20 GMT]]>@stefanwoe said in How can i log all executions of QAction?:

connect(this, SIGNAL(triggered(bool)), this, SLOT(onTriggered(bool)));

Couldn't you put this connect statement (and switch to the new(ish) connect format) in the constructor of MyAction?

]]>https://forum.qt.io/post/730416https://forum.qt.io/post/730416Tue, 27 Sep 2022 21:05:20 GMT<![CDATA[Reply to How can i log all executions of QAction? on Tue, 27 Sep 2022 20:31:42 GMT]]>@DerReisende
As noted above, you cant override QAction::activate its not virtual.

]]>https://forum.qt.io/post/730413https://forum.qt.io/post/730413Tue, 27 Sep 2022 20:31:42 GMT<![CDATA[Reply to How can i log all executions of QAction? on Tue, 27 Sep 2022 20:22:58 GMT]]>I found a rather simple solution inspired by @DerReisende.
It just uses a signal / slot. So all i had to do besides this, was
replace "new QAction" by "new MyAction" all over my program.

This seems to work fine:

class MyAction : public QAction
{
    Q_OBJECT
    using QAction::QAction;

    bool event(QEvent *e);

public slots:
    void onTriggered(bool);
};

bool MyAction ::event(QEvent *e)
{
    if(e->type() == QEvent::ActionChanged)
    {
        static const QMetaMethod triggeredSignal = QMetaMethod::fromSignal(&CMDIAction::triggered);

        if(! isSignalConnected(triggeredSignal))
           connect(this, SIGNAL(triggered(bool)), this, SLOT(onTriggered(bool)));
    }
    return QAction::event(e);
}

void MyAction ::onTriggered(bool)
{
    gLogStream << " Action Triggered: " << text() ;
}
]]>https://forum.qt.io/post/730411https://forum.qt.io/post/730411Tue, 27 Sep 2022 20:22:58 GMT<![CDATA[Reply to How can i log all executions of QAction? on Tue, 27 Sep 2022 20:10:29 GMT]]>I meant void QAction::activate(ActionEvent event):

void QAction::activate(ActionEvent event)
1113	{
1114	    Q_D(QAction);
1115	    if (event == Trigger) {
1116	        // Ignore even explicit triggers when explicitly disabled
1117	        if ((d->explicitEnabled && !d->explicitEnabledValue) || (d->group && !d->group->isEnabled()))
1118	            return;
1119	        QPointer<QObject> guard = this;
1120	        if (d->checkable) {
1121	            // the checked action of an exclusive group may not be unchecked
1122	            if (d->checked && (d->group
1123	                               && d->group->exclusionPolicy() == QActionGroup::ExclusionPolicy::Exclusive
1124	                               && d->group->checkedAction() == this)) {
1125	                if (!guard.isNull())
1126	                    emit triggered(true);
1127	                return;
1128	            }
1129	            setChecked(!d->checked);
1130	        }
1131	        if (!guard.isNull())
1132	            emit triggered(d->checked);
1133	    } else if (event == Hover) {
1134	        emit hovered();
1135	    }
1136	}

This is from Qt6 source file and maybe you should be able to properly put logging content in your override.

]]>https://forum.qt.io/post/730410https://forum.qt.io/post/730410Tue, 27 Sep 2022 20:10:29 GMT<![CDATA[Reply to How can i log all executions of QAction? on Tue, 27 Sep 2022 19:45:46 GMT]]>@DerReisende I tried that, but i dont find a matching event type:
I find 3 events related to actions:
QEvent::ActionAdded
QEvent::ActionChanged
QEvent::ActionRemoved
(https://doc.qt.io/qt-6/qevent.html)

QEvent::ActionChanged will be send when executing but also when building the events or on a a language change etc. I dont find a way to distinguish this.

]]>https://forum.qt.io/post/730408https://forum.qt.io/post/730408Tue, 27 Sep 2022 19:45:46 GMT<![CDATA[Reply to How can i log all executions of QAction? on Tue, 27 Sep 2022 15:28:32 GMT]]>Having had only a quick look at QAction source why don‘t you overrride the event() function and do the logging before emitting the appropriate signals?

]]>https://forum.qt.io/post/730367https://forum.qt.io/post/730367Tue, 27 Sep 2022 15:28:32 GMT