Re: Help me to solve this error message!

[Murray Cumming <murrayc murrayc com>]

On Wed, 2007-03-28 at 15:27 +0530, SaiKamesh Rathinasabapathy wrote:
> Hi All,
> 
> I am trying to run a program which is used for reading data from seial
> port. But it is giving error message. I don't know how to solve that
> error message. Please give me ideas to solve this. I am using
> gtkmm-2.4 and os is Linux - ubuntu. 
> 
> Here I have attached my program and the error message:
> #include <gtkmm.h>
> #include "gtkmmconfig.h" 
> #include <fcntl.h>
> #include <iostream>
> #include < unistd.h> 
> #include <sys/types.h>
> #include <sys/stat.h>
> class serialport
> {
>         public:
>         int read_fd;
>         Glib::RefPtr<Glib::IOChannel> iochannel;
>         Glib::ustring buf; 
>       
>         bool MyCallback(Glib::IOCondition io_condition);
> 
>     serialport()
>         {
>                 
>                 read_fd = open("/dev/ttyS0", O_RDONLY);
>                 // connect the signal handler 
>                 Glib::signal_io().connect(sigc::ptr_fun(MyCallback),

sigc::ptr_fun() is for global (or static) functions. But your
MyCallback() is a member function, of your serialport.

sigc::mem_fun() is probably what you want.

>  read_fd, Glib::IO_IN);
>  
>                 // Creates a iochannel from the file descriptor
>                 iochannel = Glib::IOChannel::create_from_fd(read_fd); 
>                 
>         }
> };
>  
> bool serialport::MyCallback(Glib::IOCondition io_condition)
> {
>    iochannel->read_line(buf);
>   
>    std::cout << buf;
>    if (buf == "Q\n")
>            Gtk::Main::quit ();
> 
>   return true;
> }
> 
> int main(int argc, char *argv[])
> {
>   
>    serialport win;
>    return 0;
> }
> 
> For compilation I am using this command :
> g++  IO.cc -o IO  `pkg-config gtkmm-2.4 --cflags --libs` `pkg-config
> --libs gthread-2.0`
> 
> Error:
>  
> IO.cc: In constructor 'serialport::serialport()':
> IO.cc:29: error: no matching function for call to 'ptr_fun(<unresolved
> overloaded function type>)' 
> 
> -------------------------------------------------------------------------------------------------------------------------------------------
> Thank you!
> _______________________________________________
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-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com
www.openismus.com