How can I move my normal c++ main() function code to qt main function?

[jsulm]

@Ashish-Tupate said in How can I move my normal c++ main() function code to qt main function?:

Is it possible?

Sure it is, why not?

The code you put in test.cpp - is it called somewhere? I mean: do you use class EncoderCount somewhere? You're using a member function (method) as a callback - this will not work as you need a function.

[Ashish Tupate]

@jsulm test.cpp is encodercount.cpp and yes it is not working.

[jsulm]

@Ashish-Tupate What is not working? Can you please describe the problem clearly? Post the error message?

[Ashish Tupate]

@jsulm my main.cpp file look like this

#include "encodercount.h"

using namespace std;

int main(int argc, char *argv[])
{
    initEncoder();

    QApplication app(argc, argv);
    Dialog w;
    w.show();

    int result = a.exec(); // exec() blocks until you close the app
    stopEncoder();

    return app.exec();
}

and encodercount.h

#ifndef ENCODERCOUNT_H
#define ENCODERCOUNT_H

#include <rotary_encoder.hpp>


namespace Encoder {
class EncoderCount;
}

class EncoderCount
{
public:
    explicit EncoderCount();
    ~EncoderCount();

    void initDecoder();
    void stopDecoder();

};


#endif // ENCODERCOUNT_H

encodercount.cpp

void callback(int way)
{
    cout << " callback"<< endl;

    static int pos = 0;

       pos += way;
       qDebug() << "pos=" << pos ;
}

void initDecoder()
 {
     cout << "pigpio test"<< endl;

     if (gpioInitialise() < 0) return 1;

     re_decoder dec(8, 11, callback);

 }

 void stopDecoder()
 {
     dec.re_cancel();
     gpioTerminate();
 }

and I am getting error :
'initEncoder' was not declared in this scope
initEncoder();
^
'a' was not declared in this scope
int result = a.exec(); // exec() blocks until you close the app
^
'stopEncoder' was not declared in this scope
stopEncoder();
^

[jsulm]

@Ashish-Tupate Add initEncoder(); and stopEncoder(); to encodercount.h.

Change

int result = a.exec();

to

int result = app.exec();

[Ashish Tupate]

@jsulm I dont know why but this error again even if these functions are inside encodercount.h:

'initEncoder' was not declared in this scope
initEncoder();
^
'stopEncoder' was not declared in this scope
stopEncoder();
^

#ifndef ENCODERCOUNT_H
#define ENCODERCOUNT_H
#include <rotary_encoder.hpp>


namespace Encoder {
class EncoderCount;
}

class EncoderCount
{
public:
    explicit EncoderCount();
    ~EncoderCount();

    void initEncoder();
    void stopEncoder();

};


#endif // ENCODERCOUNT_H

[jsulm]

@Ashish-Tupate Please think about what you are doing: you put both functions inside EncoderCount class! And then you try to call them as if they would be simple functions.
You should learn C++.
It should be like this:

#ifndef ENCODERCOUNT_H
#define ENCODERCOUNT_H
#include <rotary_encoder.hpp>

void initEncoder();
void stopEncoder();

[Ashish Tupate]

@jsulm Yes you are right but you have to help me out.Again I got the error :
return-statement with a value, in function returning 'void' [-fpermissive]
if (gpioInitialise() < 0) return 1;
^

[jsulm]

@Ashish-Tupate "but you have to help me out" - no I don't have to.
You should really learn C++ and read the error messages carefully. What you are asking is completely unrelated to Qt.
Change

if (gpioInitialise() < 0) return 1;

to

if (gpioInitialise() < 0) return;

[Ashish Tupate]

@jsulm Thank you for your help.