Re: main window not redrawing after dialog closes

[Rob Benton <rob benton conwaycorp net>]

Emilian Nowak wrote:
> On 2006-01-25 (wed) Rob Benton wrote:
>
>
> > In my main window I open a filechooser dialog then close it, set the 
> > mouse cursor to Gdk::WATCH, call a function, then change back the 
> > cursor.  The problem is after the dialog closes the main window does not 
> > immediately redraw and the cursor does not immediately change.  It's not 
> > until my function is nearly finished that these things happen.  What 
> > could be my problem here?  Maybe I'm not understanding the way X events 
> > fit in with non-X operations.
>
>
> I guess that probably this method causes gui-freezing. 
>
> >         _member_widget->read_from_xml(_filename);
> >         // enable menu items
>
>
> Every program should have different thread for non-gui operations especially
> if it makes, a lot of computing/data processing.
> Read about Glib::Thread
> http://www.gtkmm.org/docs/glibmm-2.4/docs/reference/html/classGlib_1_1Thread.html
> and all other resources available on Internet about multi-threaded
> applications.

Well I gave it a shot and got the exact same results.  Do I have this in 
the right?  Now my code looks like this:

void MainWindow::menu_open()
{
	// change cursor while working
	get_window()->set_cursor(Gdk::Cursor(Gdk::WATCH));
	_filename = Glib::filename_to_utf8(dialog.get_filename());
	Glib::Thread * thread = Glib::Thread::create(
		sigc::mem_fun(*this,&MainWindow::thread_open), true);
	thread->join();
	get_window()->set_cursor();
}

void MainWindow::thread_open()
{
	_member_widget->read_from_xml(_filename);
}