Cannot reduce size of gtk window programatically - c

Question

I seem to be facing a problem when resizing a gtk window programatically. The problem is that once I have increased the width and height of the window to 800x600, I cannot seem to reduce it back to its original size of 400x200.
Below is the sample code. Has anyone faced such a problem?
#include <gtk/gtk.h>
static gboolean is_clicked = FALSE;
static void Child_window_resize( GtkWidget *widget,
GtkWidget *window)
{
if(!is_clicked)
{
g_print("Inside If block increase bool value %d\n",is_clicked);
gtk_widget_set_size_request(window,800,600);
is_clicked = TRUE;
}
else
{
g_print("Inside Else block decrease bool value %d\n",is_clicked);
gtk_widget_set_size_request(window,400,200);
is_clicked = FALSE;
}
}
int main(int argc, char* argv[])
{
GtkWidget *window;
GtkWidget *fixed;
GtkWidget *resizebutton;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request(window,400,200);
gtk_window_set_resizable(GTK_WINDOW(window),TRUE);
gtk_window_set_title(GTK_WINDOW(window), "Demo Resize");
gtk_window_set_decorated(GTK_WINDOW(window),FALSE);
gtk_signal_connect(GTK_OBJECT(window), "destroy",
GTK_SIGNAL_FUNC(gtk_exit), NULL);
gtk_container_set_border_width(GTK_CONTAINER(window), 10);
// creating a fixed GTK_CONTAINER
fixed = gtk_fixed_new();
gtk_container_add(GTK_CONTAINER(window),fixed);
gtk_widget_show(fixed);
resizebutton = gtk_button_new_with_label("Resize");
gtk_widget_set_size_request(resizebutton, 80, 60);
gtk_fixed_put(GTK_FIXED(fixed), resizebutton, 0, 0);
gtk_signal_connect(GTK_OBJECT(resizebutton), "clicked",
GTK_SIGNAL_FUNC(Child_window_resize), window);
gtk_widget_show(resizebutton);
gtk_widget_show(window);
gtk_main();
return 0;
}
Complied using ...
gcc -Wall -Werror -g resize.c -o resize -export-dynamic `pkg-config --cflags --libs gtk+-2.0 gthread-2.0`
Any help is much appreciated.

Answer 1

Instead of gtk_widget_set_size_request(), you need gtk_window_resize().
From the linked manual:
void
gtk_window_resize (GtkWindow *window,
gint width,
gint height);
Resizes the window as if the user had done so, obeying geometry
constraints. The default geometry constraint is that windows may not
be smaller than their size request; to override this constraint, call
gtk_widget_set_size_request() to set the window's request to a smaller
value.
If gtk_window_resize() is called before showing a window for the first
time, it overrides any default size set with
gtk_window_set_default_size().
Windows may not be resized smaller than 1 by 1 pixels.