No matching signals for all controls
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@Deathcomes said in No matching signals for all controls:
Yes but they are created after every build. Shouldn't they?
Yes but i just tested with shadow build off and those files go INTO the build
folder. They should not be in project folder and if they are stale they might give all sort of odd errors if compilers sees them.@mrjj said in No matching signals for all controls:
Yes but i just tested with shadow build off and those files go INTO the build
!!!!!! REALLY???
@J-Hilk I would have to go back 5 years in my memories to tell you and i don't think i'm capable of (I can't remember what i ate yesterday!! :) )!
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@mrjj Also i just tried it with another project (build/run in debug mode without debugger) and the signal slots connected properly AND the "Makefile" files have been created inside the root folder of the project.
Could it be something wrong with my configuration? -
@mrjj said in No matching signals for all controls:
Yes but i just tested with shadow build off and those files go INTO the build
!!!!!! REALLY???
@J-Hilk I would have to go back 5 years in my memories to tell you and i don't think i'm capable of (I can't remember what i ate yesterday!! :) )!
@Deathcomes
no. you are right.
Tested with a new project and disabled shadow
then they come in the folder
I just been using shadows build since day one so never noticed.
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Hi
- Could it be something wrong with my configuration?
well, other projects works so thats no so likely.
but i wonder if something up with that .pro file.You could try recreate the project in a new folder.
copy all .h and .cpp and then add to Project file using "Add existing " when right clicking on the project top name. -
Hi
- Could it be something wrong with my configuration?
well, other projects works so thats no so likely.
but i wonder if something up with that .pro file.You could try recreate the project in a new folder.
copy all .h and .cpp and then add to Project file using "Add existing " when right clicking on the project top name.@mrjj Ok i will try.
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@mrjj Unfortunately! Same problem.
@Deathcomes
and that was without re-using the .pro file ?
That is very, very odd. -
@Deathcomes
and that was without re-using the .pro file ?
That is very, very odd.@mrjj Yes the only thing i "used" from the old pro was this
from this (default when creating a project)
QT += core guito this
QT += core gui winextras sql network concurrentand also i added this because i was missing some libraries
LIBS += -LC:/Qt/Qt5.2.1/5.2.1/mingw48_32/lib -lQt5Ftp -lKernel32 -
@mrjj Yes the only thing i "used" from the old pro was this
from this (default when creating a project)
QT += core guito this
QT += core gui winextras sql network concurrentand also i added this because i was missing some libraries
LIBS += -LC:/Qt/Qt5.2.1/5.2.1/mingw48_32/lib -lQt5Ftp -lKernel32@Deathcomes
Ok that seems fine.does the connect work if you use
the connect statement ? -
@mrjj Yes because i have other connect with custom slots
@Deathcomes
so its only the auto matching that complains ? -
@Deathcomes
so its only the auto matching that complains ? -
@mrjj Correct
@Deathcomes
I have no idea why then it must not seem then when running
QMetaObject::connectSlotsByName(Widget); -
New info on the problem!
The failing auto connection of the signals happen when i add the -lQt5Ftp library on
LIBS += -LC:/Qt/Qt5.2.1/5.2.1/mingw48_32/lib -lQt5Ftp -lKernel32which i built from this https://github.com/qt/qtftp
I tested it with creating a new empty qt project (window application) and adding only one button and slot (with right click -> goto slot "clicked"). Inside the slot i added a
qDebug() << "Click";Built/run on debug mode and everything runs smoothly (the slot is connected and fired properly)
Then i add the above line inside the .pro file and Rebuilt the project from scratch. When i run the application i got the usual warning
QMetaObject::connectSlotsByName: No matching signal for on_pushButton_clicked()and the slot is not fired.
I also tested if the library -lKernel32 was the problem but everything executed fine when i left only this library. -
New info on the problem!
The failing auto connection of the signals happen when i add the -lQt5Ftp library on
LIBS += -LC:/Qt/Qt5.2.1/5.2.1/mingw48_32/lib -lQt5Ftp -lKernel32which i built from this https://github.com/qt/qtftp
I tested it with creating a new empty qt project (window application) and adding only one button and slot (with right click -> goto slot "clicked"). Inside the slot i added a
qDebug() << "Click";Built/run on debug mode and everything runs smoothly (the slot is connected and fired properly)
Then i add the above line inside the .pro file and Rebuilt the project from scratch. When i run the application i got the usual warning
QMetaObject::connectSlotsByName: No matching signal for on_pushButton_clicked()and the slot is not fired.
I also tested if the library -lKernel32 was the problem but everything executed fine when i left only this library.@Deathcomes
That is really odd as that's a lib and should not really
interfere with moc and signal findings.
Maybe it screws up the meta data somehow. -
@Deathcomes
That is really odd as that's a lib and should not really
interfere with moc and signal findings.
Maybe it screws up the meta data somehow.@mrjj said in No matching signals for all controls:
Maybe it screws up the meta data somehow.
How can i check it?
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@mrjj said in No matching signals for all controls:
Maybe it screws up the meta data somehow.
How can i check it?
@Deathcomes
I dont know if we can see that.
we can check what connectSlotsByName
does here
https://code.woboq.org/qt5/qtbase/src/corelib/kernel/qobject.cpp.html#3539maybe we could dump the names it sees with and without ftp lib.
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New info on the problem!
The failing auto connection of the signals happen when i add the -lQt5Ftp library on
LIBS += -LC:/Qt/Qt5.2.1/5.2.1/mingw48_32/lib -lQt5Ftp -lKernel32which i built from this https://github.com/qt/qtftp
I tested it with creating a new empty qt project (window application) and adding only one button and slot (with right click -> goto slot "clicked"). Inside the slot i added a
qDebug() << "Click";Built/run on debug mode and everything runs smoothly (the slot is connected and fired properly)
Then i add the above line inside the .pro file and Rebuilt the project from scratch. When i run the application i got the usual warning
QMetaObject::connectSlotsByName: No matching signal for on_pushButton_clicked()and the slot is not fired.
I also tested if the library -lKernel32 was the problem but everything executed fine when i left only this library.@Deathcomes
One question: why is something as old as Qt 5.2 involved in your build? -
@Deathcomes
One question: why is something as old as Qt 5.2 involved in your build?@JonB We started development on that version and there was never a necessity to upgrade to a newer version.
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It seems (again!) that the problem indeed wasn't the qt5ftp library but the way i built it.
You see we use dynamic linking for all the libraries we use in our application (qt and 3rd party) and by mistake i had statically built the qtftp library.
This seems that had created some "conflicts" that were the cause of the mentioned problem.
