Link method to Qpushbutton

[jorgeg922]

I have these 3 files below. Basically, I made a method in file LeptonTemp.cpp which I would like to link to a QPushButton. I instantiated the class into my main.cpp file, but when I try to place my method (doSomething) in SLOT, Im getting an error at compilation. Can anyone tell me what I am doing wrong?

LeptonTemp.cpp

LeptonTemp::LeptonTemp(){}
LeptonTemp::~LeptonTemp(){}
void LeptonTemp::doSomething(){
         qDebug<<"Hello World";
}

LeptonTemp::LeptonTemp(){}
LeptonTemp::~LeptonTemp(){}
void LeptonTemp::doSomething(){
         qDebug<<"Hello World";
}

To copy to clipboard, switch view to plain text mode 

LeptonTemp.h

class LeptonTemp
{
public:
         LeptonTemp();
         ~LeptonTemp();
public slots:
         void doSomething();
};

class LeptonTemp
{
public:
         LeptonTemp();
         ~LeptonTemp();
public slots:
         void doSomething();
};

To copy to clipboard, switch view to plain text mode 

main.cpp

int main (int argc, char **argv)
{
           QApplication a(argc, argv);
           QWdiget *myWidget = new QWidget;
           myWidget->setGeometry(400,300,340,290);
 
           QPushButton *internalTmp = new PushButton("Internal temp", myWidget);
           internalTmp->setGeometry(320,290,100,30);
 
           LeptonTemp *temp = new LeptonTemp();
           QObject::connect(internalTmp, SIGNAL(clicked()), temp, SLOT(doSomething)));
 
           myWidget->show();
           return a.exec;
}

int main (int argc, char **argv)
{
           QApplication a(argc, argv);
           QWdiget *myWidget = new QWidget;
           myWidget->setGeometry(400,300,340,290);

           QPushButton *internalTmp = new PushButton("Internal temp", myWidget);
           internalTmp->setGeometry(320,290,100,30);
           
           LeptonTemp *temp = new LeptonTemp();
           QObject::connect(internalTmp, SIGNAL(clicked()), temp, SLOT(doSomething)));

           myWidget->show();
           return a.exec;
}

To copy to clipboard, switch view to plain text mode 

[anda_skoa]

If you are using macro based connect(), i.e. the connect() overloads for the SIGNAL and SLOT macros, then the receiver needs to be a QObject derived class and have the Q_OBJECT marker

class LeptonTemp : public QObject
{
    Q_OBJECT
public:

class LeptonTemp : public QObject
{
    Q_OBJECT
public:

To copy to clipboard, switch view to plain text mode 

Or use "pointer to member function" connect() overload.

Cheers,
_