I've been trying to figure out how to use Gtk2::Plug and Gtk2::Socket for awhile, but I've recently stumbled across this PyGTK FAQ Entry. From what I understand, embedding an arbitrary program which adheres to the XEMBED protocol is fairly straight forward:
#!/usr/bin/perl -w
use strict;
use Gtk2 '-init';
my $window = new Gtk2::Window;
my $socket = new Gtk2::Socket;
$window->add($socket);
$socket->add_id($window_id_of_program_to_embed);
$window->show_all;
Gtk2->main;
The biggest problem I see with this is trying to launch the program to embed and determine it's window id. I've written a code in c using X11 functions to determine the window id of a program given it's name, class, and classname (from `xprop`):
int main(void) {
int i;
unsigned int number_of_children;
Display *display;
Window window, root, *children, window_root, window_parent;
XClassHint class_hint;
XTextProperty wmname;
if (!(display = XOpenDisplay(":0.0"))) return 1;
if (!(root = DefaultRootWindow(display))) return 1;
if (!(XQueryTree(display, root, &window_root, &window_parent, &chi
+ldren, &number_of_children))) return 1;
if (!(number_of_children > 0)) return 1;
for (i=0;i<number_of_children;i++) {
if (!XGetWMName(display, *(children+i), &wmname)) continue;
if (!XGetClassHint(display, *(children+i), &class_hint)) conti
+nue;
if (
(strcmp("Volume", (char *) wmname.value) == 0) &&
(strcmp("gnome-settings-daemon", class_hint.res_name) == 0
+) &&
(strcmp("Gnome-settings-daemon", class_hint.res_class) ==
+0)
) {
window = *(children+i);
break;
}
}
if (number_of_children > 0) XFree(children);
if (i == number_of_children) return 1;
printf("Found window id 0x%x\n", window);
But I don't know how to find the window id in a cross platform manner, much less keep track of the window id generated by a spawned process.
For that matter, I've tried searching CPAN to find the perl module containing the above X11 functions, but nothing was obvious (X11::Lib and Tk::Xlib have promising names, but aren't documented). If I end up having to switch on $^O, I have no idea how to determine the window id (or hwnd?) on windows, much less with all the pertinent error checking demonstrated in the c code above.