Connection ui button to Slot in file.cpp

Nafab213

I created two buttons in the central widget of my window from Qtdesigner. But I can not find the buttons to establish a connection to a slot in the file.cpp of my class. I have a slot "affichefenetrecene" and "affichefenetrecenep" that I want to connect to my buttons.
That's myfile.cpp

#include "fenprincipale.h"
#include "ui_fenprincipale.h"
#include "fencene.h"
#include "fencenep.h"

FenPrincipale::FenPrincipale(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::FenPrincipale)
{
    ui->setupUi(this);
    fencen = new QWidget;
    setCentralWidget(fencen);


    QStackedWidget *centralfencen = new QStackedWidget;
    stackedWidget->addWidget(fencen);
    stackedWidget->addWidget(FenCene());
    stackedWidget->addWidget(FenCenep());

    connect(ui->bttoncene, SIGNAL(clicked()), this, SLOT(Affichefencene()));
    connect(ui->bttoncenep, SIGNAL(clicked()), this, SLOT(Affichefencenep()));
}

FenPrincipale::~FenPrincipale()
{
    delete ui;
}

void FenPrincipale::Affichefencene()
{
    centralfencen->setCentralWidget(FenCene());
}

void FenPrincipale::Affichefencenep()
{
   centralfencen->setCentralWidget(FenCenep());
}

I will have to create them manually?
How can I use the buttons in my file.cpp.

Kent-Dorfman

Does the class header file include the Q_OBJECT macro? It is required so that the metadata for signals/slots are included. At least that used to be a requirement. I've been in pyqt land for too long...

dheerendra

Did you declare them under the public slots ? Can you show your header files ? You cannot find means what ? Are you not able to compile the program ? Slot is not called when you click on the button ? Please explain.

jsulm

@Nafab213 said in Connection ui button to Slot in file.cpp:

I will have to create them manually?

You mean the slots? Yes, you have to implement them.
What are their names actually? Because in the connect calls they have upper-case first later, but you say you have "affichefenetrecene" and "affichefenetrecenep". C++ is case sensitive.

J.Hilk

@Nafab213
how does your header file looks like, did you actually place Affichefencene and Affichefencenep under the slots macro ? You're using the old style qt4 connect so that is a requirement.

I suggest the following, as it will either work or give you compile time errors:

connect(ui->bttoncene, &QPushButton::clicked, this, &FenPrincipale::Affichefencene);
    connect(ui->bttoncenep,  &QPushButton::clicked, this, &FenPrincipale::Affichefencenep);

Kent-Dorfman

@dheerendra said in Connection ui button to Slot in file.cpp:

Did you declare them under the public slots ? Can you show your header files ? You cannot find means what ? Are you not able to compile the program ? Slot is not called when you click on the button ? Please explain.

is public slots: actually required in the declarations or is it just a nice visual queue? My foggy memory seems to indicate that it was not strictly required, as long as the methods were accessible where they are connected.

J.Hilk

@Kent-Dorfman
requiered for Qt4 macros, visual queue for Qt5 syntax