Re: [gtkmm] BadWindow ( invalid Window parameter ) / Gtk::Dialog hell for newbie

[Vladislav Grinchenko <3rdshift comcast net>]

Akbar,

a while ago I wrote a Fork class that I use with Gtkmm2.
Take a look at the commet to fork_exec () function in
(link might get wrapped):

<http://cvs.sourceforge.net/viewcvs.py/libassa/libassa/assa/Fork.cpp?rev=1.5&view=auto>


Perhaps you are not catching SIGCHLD signal.

hope this helps,
-Vlad

On Wed, 2004-04-14 at 05:03, Akbar wrote:
> I try to make front-end using gktmm library and glade. I use gtkmm 2.2
> and glade 2.0.0. My program will convert ogg files to mp3 files and vice
> versa. It works great but only for one file. I always get this error
> when I want to convert all files in one directory:
> 
> 
> The program 'converter' received an X Window System error.
> This probably reflects a bug in the program.
> The error was 'BadWindow (invalid Window parameter)'.
>   (Details: serial 2703 error_code 3 request_code 4 minor_code 0)
>   (Note to programmers: normally, X errors are reported asynchronously;
>    that is, you will receive the error a while after causing it.
>    To debug your program, run it with the --sync command line
>    option to change this behavior. You can then get a meaningful
>    backtrace from your debugger if you break on the gdk_x_error()
> function.)
> 
> I am newbie so don't expect me to understand this error. Ok here's the
> detail:
> I got Gtk::Entry entry to hold the file or directory that user want to
> convert. If the case is file, it is easy. If the file is
> /home/knight/Music/blabla.mp3, my program will convert it to blabla.ogg
> file. if the file is /home/knight/Music/blabla.ogg, my program will
> convert it to mp3 file. But if the case is directory, it is not easy
> anymore. It is hell for me. :( 
> 
> Assume entry hold this value: /home/knight/Music. Just for note, I set
> entry value using Gtk::FileSelection class. If my user push the
> Gtk::Button convert, my program will confuse. What files must it
> convert? mp3 to ogg or ogg to mp3? 
> 
> Then I make Gtk::Dialog dialog. Here's the code. If you push the button,
> this function will work:
> 
> void window1::on_convert_clicked()
> {  
> 	if(status==1) {             //if the case is file
> 	song = input->get_text();
>         on_processing();
> 	}
> 	else if(status==2) {        //if the case is directory
> 
>                 //Ok, look over here: I make a dialog. The dialog for 
>                 //this mailing list purpose will consist only two 
>                 //button; ogg and mp3
> 		Gtk::Dialog *dialog;
> 		dialog = new class Gtk::Dialog("bla bla", *this ) ;
>                 dialog->add_button("ogg",1);
> 		dialog->add_button("mp3",2);
> 
> 		int bla;
> 		bla = dialog->run();
> 
> 		DIR *d;
> 	        struct dirent *dir;
> 
> 
> 		delete dialog;
> 
> 
> 		Glib::ustring Direct = input->get_text();
> 	        d = opendir(Direct.c_str());
> 	        string temp;
> 	        vector<string> files;
> 		switch(bla) {
> 			case 1: 
> 		                if(d) {
> 			                while((dir = readdir(d))) {
> 						temp = dir->d_name;
> 						if(temp.length()>=4)
> 					               if(temp.substr(temp.length()-4,4)==".ogg")	
> 						                files.push_back(temp);
> 					}
> 				}
> 				break;
> 			case 2: 
> 				if(d) {
> 					while((dir = readdir(d))) {
> 						temp = dir->d_name;
> 						if(temp.length()>=4)
> 						       if(temp.substr(temp.length()-4,4)==".mp3")
> 						        	files.push_back(temp);
> 					}
> 				}
> 				break;
> 			default:
> 				break;
> 		}
> 		int child;
> 		if(fork()==0) 
> 		     for( int i=0; i<files.size(); i++ ) {
> 		        	song = Direct + "/" + files[i];
> 		        	on_processing();
> 				wait(&child);
> 		     }
> 	}
> }
> 
> 
> But if I push the ogg or mp3 button in Gtk::Dialog dialog, I get this
> message:
> This probably reflects a bug in the program.
> The error was 'BadWindow (invalid Window parameter)'.
>   (Details: serial 2703 error_code 3 request_code 4 minor_code 0)
>   (Note to programmers: normally, X errors are reported asynchronously;
>    that is, you will receive the error a while after causing it.
>    To debug your program, run it with the --sync command line
>    option to change this behavior. You can then get a meaningful
>    backtrace from your debugger if you break on the gdk_x_error()
> function.)
> 
> If I comment the delete dialog statement, I got this error:
> Xlib: unexpected async reply (sequence 0x24ff)!
> 
> Please, tell me what's wrong!!!!
> Here's my gdb sessing after fork() function statement:
> 
> Breakpoint 2, window1::on_convert_clicked (this=0x80834c8) at
> window1.cc:307
> 307                     if(fork()==0)
> (gdb) n
> Detaching after fork from child process 7052.
> 101         { for ( ; __first != __last; ++__first) _Destroy(&*__first);
> }
> (gdb) n
> 130           _M_deallocate(_Tp* __p, size_t __n) {
> _Alloc_type::deallocate(__p,  __n);}
> (gdb) n
> 242           { if (0 != __n) _Alloc::deallocate(__p, __n * sizeof
> (_Tp)); }
> (gdb) n
> 249           { return  _M_dataplus._M_p; }
> (gdb) n
> 38      {
> (gdb) n
> 40        __asm__ __volatile__ ("lock; xadd{l} {%0,%1|%1,%0}"
> (gdb) n
> 38      {
> (gdb) n
> 207                 _M_destroy(__a);
> (gdb) n
> 656           ~allocator() throw() {}
> (gdb) n
> 314     }
> (gdb) n
> 0x08053a27 in SigC::ObjectSlot0_<void, window1_glade>::proxy
> (s=0x8106580)
>     at object_slot.h:62
> 62              return ((Obj*)(os->object_)
> (gdb) n
> Glib::SignalProxyNormal::slot0_void_callback (self=0x80ad160,
> data=0x81065b0)
>     at signalproxy.cc:108
> 108     signalproxy.cc: No such file or directory.
>         in signalproxy.cc
> (gdb) n
> 0x40760d27 in g_cclosure_marshal_VOID__VOID ()
>    from /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_cclosure_marshal_VOID__VOID,
> which has no line number information.
> 0x4074dea7 in g_closure_invoke () from /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_closure_invoke,
> which has no line number information.
> 0x4074e3d0 in g_signal_type_cclosure_new () from
> /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_signal_type_cclosure_new,
> which has no line number information.
> 0x4074dee0 in g_closure_invoke () from /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_closure_invoke,
> which has no line number information.
> 0x407607d6 in g_signal_emit_by_name () from
> /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_signal_emit_by_name,
> which has no line number information.
> 0x40761e40 in g_cclosure_marshal_BOOLEAN__FLAGS ()
>    from /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function
> g_cclosure_marshal_BOOLEAN__FLAGS,
> which has no line number information.
> 0x407604dd in g_signal_emit_by_name () from
> /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_signal_emit_by_name,
> which has no line number information.
> 0x40761e40 in g_cclosure_marshal_BOOLEAN__FLAGS ()
>    from /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function
> g_cclosure_marshal_BOOLEAN__FLAGS,
> which has no line number information.
> 0x40760627 in g_signal_emit_by_name () from
> /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_signal_emit_by_name,
> which has no line number information.
> 0x4075f958 in g_signal_emit_valist () from
> /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_signal_emit_valist,
> which has no line number information.
> 0x4075fb94 in g_signal_emit () from /usr/lib/./libgobject-2.0.so.0
> (gdb) n
> Single stepping until exit from function g_signal_emit,
> which has no line number information.
> 0x40314a5b in gtk_button_clicked () from /usr/lib/./libgtk-x11-2.0.so.0
> (gdb) n
> Single stepping until exit from function gtk_button_clicked,
> which has no line number information.
> 0x40315a4b in _gtk_button_paint () from /usr/lib/./libgtk-x11-2.0.so.0
> (gdb) n
> Single stepping until exit from function _gtk_button_paint,
> which has no line number information.
> 0x40316110 in _gtk_button_set_depressed () from
> /usr/lib/./libgtk-x11-2.0.so.0
> (gdb) n
> Single stepping until exit from function _gtk_button_set_depressed,
> which has no line number information.
> The program 'converter' received an X Window System error.
> This probably reflects a bug in the program.
> The error was 'BadWindow (invalid Window parameter)'.
>   (Details: serial 2701 error_code 3 request_code 10 minor_code 0)
>   (Note to programmers: normally, X errors are reported asynchronously;
>    that is, you will receive the error a while after causing it.
>    To debug your program, run it with the --sync command line
>    option to change this behavior. You can then get a meaningful
>    backtrace from your debugger if you break on the gdk_x_error()
> function.)
> 
> 
> Thank you!!!!
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list
-- 
_____________________________________________________________
Vladislav Grinchenko       http://home.comcast.net/~3rdshift/
                                 e-mail: 3rdshift comcast net
                                                   
      Focus on quality, and productivity will follow.
_____________________________________________________________