как вывести картинку в GTK повторно?

#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk/gdkkeysyms.h>

static GdkPixbuf *image;
static GtkWidget *win;
static GtkWidget *gimage;

//реакция на кнопки
static void which_key_press (GtkWidget *widget, GdkEventKey *event, gpointer data)
{
  switch (event->keyval){
	case GDK_Up:
	
image = gdk_pixbuf_new_from_file ("1.jpg", NULL);
gtk_image_set_from_pixbuf (GTK_IMAGE(gimage), image);
g_object_unref(image);
		break;
	case GDK_Down:

image = gdk_pixbuf_new_from_file ("2.jpg", NULL);
gtk_image_set_from_pixbuf (GTK_IMAGE(gimage), image);
g_object_unref(image);
		break;		
    default:
		break;
  }
}

int main (int argc, char **argv)
{
	gtk_init (&argc, &argv);

	image = gdk_pixbuf_new_from_file ("1.png", NULL);	
	gimage = gtk_image_new_from_pixbuf (image);
	
	win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_window_set_position (GTK_WINDOW (win), GTK_WIN_POS_CENTER_ALWAYS);

	gtk_container_add (GTK_CONTAINER (win), gimage);
	g_signal_connect (GTK_OBJECT(win), "destroy", gtk_main_quit, NULL);
	g_signal_connect (G_OBJECT (win), "key_press_event",
  			G_CALLBACK (which_key_press), NULL);

	gtk_widget_show_all(win);
	gtk_main();
	return 0;
}