How to use std::thread in MainWindow ?

[Hiloshi]

Dear Sirs,

I am trying to add a thread function in the mainwindow.c as below:

void MainWindow::OutputValue( )
{
  for( int i = 0; i < 125; ++ i )
  {
    std::this_thread::sleep_for( std::chrono::duration<int, std::milli>( 5 ) );
    qDebug() << "inside thread function, i=" << i;
  }
}

void MainWindow::on_pushButton_13_clicked()
{
     std::thread mThread(OutputValue);
     qDebug()<<"Main Thread is running";
     mThread.join();
}

But it generate multiple error,:

1. error: static assertion failed: Wrong number of arguments for pointer-to-member
2. error: no type named 'type' in 'class std::result_of<std::_Mem_fn<void (MainWindow::*)

But if I put the code inside the main.cpp of "Qt Console Application" project, instead of mainwindow.cpp of "Qt Widgets Application " project.
Then no error happen.

Why I cannot write that code inside the MainWindow ?

PS. I tried movetothread is working, but I want to test std.

Any suggestions is appreciate~

Thanks,

[JonB]

@Hiloshi
Do those two error messages from the compiler not specify a line number in your code?

[VRonin]

The errors are quite clear. OutputValue is a non-static member function so it is asking you what object should that function be called from. change it to std::thread mThread(OutputValue,this);.

I'm not getting into safety details here as the above seems like just an example code

[Hiloshi]

Dear @VRonin ,

It is working, thank you very much.

Thanks,