Qt 4.8, anyway to see lists / maps of MetaObject ?

[SPlatten]

I have two connections in a configuration file:

"dial1","dialMoved(int)","lbl1","intToString(int)"
"lbl1","asString(const QString&)","lbl1","setText(const QString&)"

The first connection works, the second doesn't, it fails on:

const int cintSignal(cpobjSignalMeta->indexOfSignal(cpszSignal));
const int cintSlot(cpobjSlotMeta->indexOfSlot(cpszSlot));
if ( cintSignal < 0 || cintSlot < 0 ) {
    continue;
}

In the debugger both cintSignal and cintSlot are -1. setText is the built in slot for QLabel, asString is my signal which is emitted from the slot intToString when a dial is moved.

I have my own derived class from QLabel which is why I have added my own signals and slots to.

I would like to see the internals of what indexOfSignal and indexOfSlot is looking at so I can see why it is failing.

[KroMignon]

@SPlatten said in Qt 4.8, anyway to see lists / maps of MetaObject ?:

setText is the signal on the QLabel, is it because this isn't a slot and doesn't appear in the slot methods, but it is in the signal methods.
With normal connections I know you can connect signals to signals...

You can do the same here:

const int cintSignal(cpobjSignalMeta->indexOfSignal(QMetaObject::normalizedSignature(cpszSignal)));
const int cintSlot(cpobjSlotMeta->indexOfSlot(QMetaObject::normalizedSignature(cpszSlot)));
const int cintSignal2(cpobjSlotMeta->indexOfSignal(QMetaObject::normalizedSignature(cpszSlot)));
if ( cintSignal < 0 || (cintSlot < 0  && cintSignal2 <0)) {
    continue;
}
connect(src, cpobjSignalMeta->method(cintSignal), dest, cpobjSlotMeta->method(qMax(cintSlot, cintSignal2));

[jsulm]

@SPlatten said in Qt 4.8, anyway to see lists / maps of MetaObject ?:

I would like to see the internals of what indexOfSignal and indexOfSlot is looking at

https://code.woboq.org/qt5/qtbase/src/corelib/kernel/qmetaobject.cpp.html#_ZNK11QMetaObject13indexOfSignalEPKc
https://code.woboq.org/qt5/qtbase/src/corelib/kernel/qmetaobject.cpp.html#_ZNK11QMetaObject11indexOfSlotEPKc

[SPlatten]

@jsulm , thank you, I just did this:

for( int i=0; i<cpobjSignalMeta->methodCount(); i++ ) {
    qDebug() << cpobjSignalMeta->method(i).signature();
}

That dumps everything I need, its interesting because having found the signatures for the signals and slots that don't work I can see why, but I don't know why the signatures do not match the prototypes, for example the prototype for the signal asString:

void asString(const QString&)

The signature is just:

asString(QString)

[KroMignon]

@SPlatten said in Qt 4.8, anyway to see lists / maps of MetaObject ?:

The signature is just:
asString(QString)

I would suggest you to use QMetaObject::normalizedSignature():

const int cintSignal(cpobjSignalMeta->indexOfSignal(QMetaObject::normalizedSignature(cpszSignal)));
const int cintSlot(cpobjSlotMeta->indexOfSlot(QMetaObject::normalizedSignature(cpszSlot)));
if ( cintSignal < 0 || cintSlot < 0 ) {
    continue;
}

[SPlatten]

@KroMignon , I'm implemented your suggestion. The second connection still fails, in the dump, I can see asString appears in the slots section as does intToString.

[KroMignon]

@SPlatten said in Qt 4.8, anyway to see lists / maps of MetaObject ?:

I'm implemented your suggestion. The second connection still fails, in the dump, I can see asString appears in the slots section as does intToString.

Perhaps it do not work because there is a typo... setText(const QStirng&) ==> setText(const QString&)

[SPlatten]

@KroMignon , I wish it was true, but that's just because I have two systems in front of me, the development system which is not connected to the system I used to post on the internet, I have to manually type in the information and that was a typo in my post only.

[SPlatten]

@KroMignon , setText is the signal on the QLabel, is it because this isn't a slot and doesn't appear in the slot methods, but it is in the signal methods.

With normal connections I know you can connect signals to signals...

[KroMignon]

@SPlatten said in Qt 4.8, anyway to see lists / maps of MetaObject ?:

setText is the signal on the QLabel, is it because this isn't a slot and doesn't appear in the slot methods, but it is in the signal methods.
With normal connections I know you can connect signals to signals...

You can do the same here:

const int cintSignal(cpobjSignalMeta->indexOfSignal(QMetaObject::normalizedSignature(cpszSignal)));
const int cintSlot(cpobjSlotMeta->indexOfSlot(QMetaObject::normalizedSignature(cpszSlot)));
const int cintSignal2(cpobjSlotMeta->indexOfSignal(QMetaObject::normalizedSignature(cpszSlot)));
if ( cintSignal < 0 || (cintSlot < 0  && cintSignal2 <0)) {
    continue;
}
connect(src, cpobjSignalMeta->method(cintSignal), dest, cpobjSlotMeta->method(qMax(cintSlot, cintSignal2));

[jsulm]

@SPlatten said in Qt 4.8, anyway to see lists / maps of MetaObject ?:

void asString(const QString&)

The signature is just:
asString(QString)

Because reference (&) is ignored.
See https://doc.qt.io/qt-5/qmetaobject.html#normalizedSignature