seg fault while moving a event box

[abhi <abhi_don_linux yahoo com>]

Hello List,

  This is my first GTK app and I want to move the
image when the user clicks on it. I created an
eventbox  and placed it on a GtkLayout. I catch the
mouse_pressed event but when I move the event_bx I get
a segfault. I dont have the symbols from the libraries
but gdb tells me this


Breakpoint 1, move (widget=0x94a10e8,
layout=0x94aef68) at g2.c:14
14        g_print("button_press_event_received\n");
(gdb) step
button_press_event_received
15        x = (x + 30) % 300;
(gdb) step
16        y = (y + 50) % 300;
(gdb) step
18        gtk_layout_get_size ( GTK_LAYOUT (layout) ,
&width, &height);
(gdb) print width
$1 = -1073765136
(gdb) print height
$2 = 155848184
(gdb) step

Program received signal SIGSEGV, Segmentation fault.
0x0017015c in g_type_check_instance_cast () from
/usr/lib/libgobject-2.0.so.0
(gdb) Quit
 

The source code is as follows
#include <gtk/gtk.h>
#include <stdlib.h>
gint x = 50;
gint y = 50;
GtkWidget *image = NULL;
/* This callback function moves the button to a new
position
 * in the layout container. */
static void move( GtkWidget *widget,
                         GtkWidget *layout )
{
  gint width,height;
  g_print("button_press_event_received\n");
  x = (x + 30) % 300;
  y = (y + 50) % 300;
  gtk_layout_get_size ( GTK_LAYOUT (layout) , &width,
&height);
  gtk_layout_move ( GTK_LAYOUT(layout), widget , x,
y); 
}
void usage()
{
   g_print(" incorrect usage need a image
parameter\n");
   exit( EXIT_FAILURE );
}
int main( int   argc,
          char *argv[] )
{
  /* GtkWidget is the storage type for widgets */
  GtkWidget *window;
  GtkWidget *layout;
  GtkWidget *event_box;
  GtkWidget *button;
  GdkPixbuf *pixbuf;
  gint i;

  if (argc < 2)  usage();

  /* Initialise GTK */
  gtk_init (&argc, &argv);
    
  /* Create a new window */
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Layout
Container");

  /* Here we connect the "destroy" event to a signal
handler */ 
  g_signal_connect (G_OBJECT (window), "destroy",
                    G_CALLBACK (gtk_main_quit), NULL);
 
  /* Sets the border width of the window. */
  gtk_container_set_border_width (GTK_CONTAINER
(window), 10);

  /* Create a Layout Container */
  layout = gtk_layout_new ( NULL, NULL);
  gtk_container_add (GTK_CONTAINER (window), layout);
  gtk_widget_show (layout);
 
  /* Create an image widget form the pixbuf */
  pixbuf = gdk_pixbuf_new_from_file(argv[1],NULL);
  image = gtk_image_new_from_pixbuf (pixbuf);

  /* Create an event box and add image widget*/
  event_box = gtk_event_box_new ();
  gtk_container_add (GTK_CONTAINER (event_box),
image);
  gtk_widget_show (image);
   
  /*put the event box somewhere on the layout */
  gtk_layout_put (GTK_LAYOUT (layout), event_box, 50 ,
50 );
  gtk_widget_show (event_box);

  /* And bind an action to it */
  gtk_widget_set_events (event_box,
GDK_BUTTON_PRESS_MASK);
  g_signal_connect (G_OBJECT (event_box),
"button_press_event",
                      G_CALLBACK (move), layout);
  gtk_widget_realize (event_box);

  /* Display the window */
  gtk_widget_show (window);
    
  /* Enter the event loop */
  gtk_main ();
    
  return 0;
}
/*
gcc g2.c -o g2 `pkg-config --cflags --libs gtk+-2.0`
*/


Any help educating me towards the cause of segfault
will be appreciated.

TIA,
Abhijeet 


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ