connect the two class in signal ,slot and emit?

amarism

I have to class file mainwindow and updater. Now i want to sent the data from updater to mainwindow.

updater.h
 signals:
       void Ok(int x);


updater.cpp
   void fun(){
          x = 10;
          emit Ok(x);
}

class form;
mainwindow.h

private slots:
     void receive(int x);

#include "updater.h"
mainwindow.cpp

mainwindow::mainwindow(){
 updater*data = new updater(this);
connect(data , &updater::Ok, this, &MainWindow::receiveOk);
}

void receiveOk(int x){
     cout << x;
}

I have done all these thing but still emit Signal not reflected inside the mainwindow.cpp file?

sierdzio

What is the question?

amarism

@sierdzio try to send data from form.cpp file and access the same data inside mainwindow.cpp . when i try to send data from form.cpp file emit not emit the signal to mainwindow.cpp.

sierdzio

OK, but instead of showing us code of your "form" class, you posted "updater" class.

Also, in connect statement, you connect to "receiveOk" slot, but you pasted code for "receive" slot instead.

Provide all the data and I'll try to help you. Right now I have no means of doing so.

SGaist

Hi,

@amarism said in connect the two class in signal ,slot and emit?:

update.cpp
void fun(){
x = 10;
emit Ok(int x);
}

The emit statement is wrong, it should be: emit Ok(x);

@amarism said in connect the two class in signal ,slot and emit?:

mainwindow.cpp
connect(data , &Form::ok, this, &MainWindow::receiveOk);

This won't compile as the name of the signal is wrong. It's Ok not ok

amarism

@SGaist I have correct all the thing but still emit not reflected into mainwindow.cpp

SGaist

Use qDebug in place of cout to see if you have a better result.

mranger90

@amarism said in connect the two class in signal ,slot and emit?:

void receiveOk(int x){
cout << x;
}

Shouldn't this be:

void mianwindow::receiveOk(int x){
     cout << x;
}

amarism

@SGaist yup now i solve the issue Thank you