Re: GtkFixed redraws

[John Cupitt <jcupitt gmail com>]

On Thu, 10 Feb 2005 23:10:06 -0500, Matt Moseley
<list_matt bellsouth net> wrote:
> I have an application where I dynamically add GtkButtons to a GtkFixed area.  Whenever I add a button to 
> the fixed area, everything to the right of and below the top left of the button I'm adding gets cleared out 
> and then redrawn.

I made a test program ... this is flicker-free for me (gtk+-2.4.14,
linux). Click a button to add more buttons.

#include <stdio.h>
#include <gtk/gtk.h>

void
add_buttons (void *dummy, GtkWidget * fixed)
{
  static int button_number = 0;
  int i;

  for (i = 0; i < 100; i++)
    {           
      GtkWidget *but;
      char buf[256];

      snprintf (buf, 256, "Button %d", button_number++);
      but = gtk_button_new_with_label (buf);
      gtk_fixed_put (GTK_FIXED (fixed), but,
                     random () % 1000, random () % 1000);
      g_signal_connect (but, "clicked", G_CALLBACK (add_buttons), fixed);
      gtk_widget_show (but);
    }   
}

int
main (int argc, char **argv)
{
  GtkWidget *window;
  GtkWidget *fixed;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  fixed = gtk_fixed_new ();
  gtk_container_add (GTK_CONTAINER (window), fixed);
  gtk_widget_show_all (window);

  add_buttons (NULL, fixed); 

  gtk_main ();

  return 0;
}