qt signal/slot auto-connect issue

[parnedo]

Hi.

I'm trying the auto-connect feature in my code but i don't arrive to get it working.

this is my code:

File .h

class TBarAffichage : public QToolBar{
     Q_OBJECT
private:
     TColorComboBox* CBoxTraitCouleurs;
     ....
private Q_SLOTS:
     void on_CBoxTraitCouleurs_activated(int);
    ....
};

class TBarAffichage : public QToolBar{
     Q_OBJECT
private:
     TColorComboBox* CBoxTraitCouleurs;
     ....
private Q_SLOTS:
     void on_CBoxTraitCouleurs_activated(int);
    ....
};

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File .cpp:

TBarAffichage::TBarAffichage(QWidget *parent):
         QToolBar(parent),
         CBoxTraitCouleurs    (new TColorComboBox(this)) {}
...
void TBarAffichage::on_CBoxTraitCouleurs_activated(int i){
    qDebug() << "activated";
}
...

TBarAffichage::TBarAffichage(QWidget *parent):
         QToolBar(parent),
         CBoxTraitCouleurs    (new TColorComboBox(this)) {}
...
void TBarAffichage::on_CBoxTraitCouleurs_activated(int i){
    qDebug() << "activated";
}
...

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The TColorComboBox.h:

class TColorComboBox : public QComboBox{
    Q_OBJECT
public:
     TColorComboBox(QWidget *widget = 0):QComboBox(widget){}
};

class TColorComboBox : public QComboBox{
    Q_OBJECT
public:
     TColorComboBox(QWidget *widget = 0):QComboBox(widget){}
};

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When i select the color combobox (CBoxTraitCouleurs) and change it (from red to white) the qDebug isn't launched.
I've tried with others objects and signals but nothing works.

What i'm doing wrong?
I've to put something into the .pro?
I've to add something to the constructor?

Thanks

[yogeshgokul]

Can you change Q_SLOTS to slots.

[Lykurg]

You have to call QMetaObject::connectSlotsByName() explicitly.

[parnedo]

Can you change Q_SLOTS to slots.

I can't because i use boost signals and there are conflicts.

[parnedo]

You have to call QMetaObject::connectSlotsByName() explicitly.

I have write

QMetaObject::connectSlotsByName(this);

QMetaObject::connectSlotsByName(this);

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in the constructor and when i execute it gives that:

QMetaObject::connectSlotsByName: No matching signal for on_CBoxTraitCouleurs_activated(int)

QMetaObject::connectSlotsByName: No matching signal for on_CBoxTraitCouleurs_activated(int)

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[jpn]

QMetaObject::connectSlotsByName() works on OBJECT names, it doesn't know anything about variable names. See QObject::setObjectName(). Anyway, perhaps it would be more straight forward in this case to just establish the connection directly. Auto connections work nicely with UIC produced code, which sets the object names and calls connectSlotsByName() automatically for you....

[yogeshgokul]

Try adding this line in .pro file.
CONFIG += no_keywords

It tells Qt not to define the moc keywords signals, slots, and emit, because these names will be used by a 3rd party library, e.g. Boost. Then to continue using Qt signals and slots with the no_keywords flag, simply replace all uses of the Qt moc keywords in your sources with the corresponding Qt macros Q_SIGNALS (or Q_SIGNAL), Q_SLOTS (or Q_SLOT), and Q_EMIT.

Enjoy

[parnedo]

Try adding this line in .pro file.
CONFIG += no_keywords

It tells Qt not to define the moc keywords signals, slots, and emit, because these names will be used by a 3rd party library, e.g. Boost. Then to continue using Qt signals and slots with the no_keywords flag, simply replace all uses of the Qt moc keywords in your sources with the corresponding Qt macros Q_SIGNALS (or Q_SIGNAL), Q_SLOTS (or Q_SLOT), and Q_EMIT.

Enjoy

That is what i do It's because of that i write Q_SLOTS.
Thank you for your reponse

[yogeshgokul]

So, is it running or what ?

[parnedo]

QMetaObject::connectSlotsByName() works on OBJECT names, it doesn't know anything about variable names. See QObject::setObjectName(). Anyway, perhaps it would be more straight forward in this case to just establish the connection directly. Auto connections work nicely with UIC produced code, which sets the object names and calls connectSlotsByName() automatically for you....

That's it.

if i add

CBoxTraitCouleurs->setObjectName("CBoxTraitCouleurs");

CBoxTraitCouleurs->setObjectName("CBoxTraitCouleurs");

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now it works.

But maybe you are right about making the connect directly.

Thank you very much