Set frame position of decorated GtkWindow on screen - c

Question

I have a task to restore window frame position on screen on program startup - so to define initial window position.
Consider the following decorated GtkWindow instance on Linux:
The window has two principal boxes: frame box and client box.
And there are two GTK functions that allow to set size and position of the window on screen:
gtk_window_move() - sets window's frame box position on screen and
gtk_window_resize - sets window's client box size.
Question:
Is there any way in GTK to define initial frame placement of the window?
On Windows I can do that by calling MoveWindow() and on MacOS NSWindow setFrame method. But on GTK... Am I asking too much?

Answer 1

Connect to the "realize" signal for the window (important: before calling gtk_widget_show). Then call gtk_window_move from the handler:
#include <gtk/gtk.h>
void on_window_realize(GtkWidget *widget,
gpointer user_data)
{
GtkWindow *window = GTK_WINDOW(user_data);
gtk_window_move(window, 100, 40);
}
int main(int argc, char **argv) {
GtkWidget *window = NULL;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(window,
"realize",
G_CALLBACK(on_window_realize),
(gpointer)window);
g_signal_connect(window, "destroy", gtk_main_quit, NULL);
gtk_widget_show(window);
gtk_main();
return 0;
}