tests: Better example

Populate the example with typical web page titles, and move the
new tab button to the headerbar.

tests/testtabstrip.c

 #include <gtk/gtk.h>
 
+static int count = 1;
+
 static void
-add_stack_child (GtkWidget *stack)
+add_child (GtkWidget  *stack,
+           const char *title)
 {
-  static int count;
   char *name;
-  char *title;
   GtkWidget *sw, *tv;
 
-  count++;
-
-  name = g_strdup_printf ("tab%d", count);
-  title = g_strdup_printf ("Page %d", count);
+  name = g_strdup_printf ("tab%d", count++);
 
   sw = gtk_scrolled_window_new (NULL, NULL);
   tv = gtk_text_view_new ();
@@ -23,22 +21,51 @@ add_stack_child (GtkWidget *stack)
   gtk_stack_add_titled (GTK_STACK (stack), sw, name, title);
 
   g_free (name);
+}
+
+static void
+add_stack_child (GtkWidget *stack)
+{
+  char *title;
+
+  title = g_strdup_printf ("Page %d", count);
+  add_child (stack, title);
   g_free (title);
 }
 
+static void
+populate (GtkWidget *stack)
+{
+  add_child (stack, "Enigma machine - Wikipedia, the free ecyclopedia");
+  add_child (stack, "Ada Lovelace");
+  add_child (stack, "Analytical Engine | computer | Britannica.com");
+  add_child (stack, "Charles Babbage");
+  add_child (stack, "Turing Machine — from Wolfram MathWorld");
+  add_child (stack, "Enigma machine - Wikipedia, the free ecyclopedia");
+  add_child (stack, "Enigma machine - Wikipedia, the free ecyclopedia");
+  add_child (stack, "Enigma machine - Wikipedia, the free ecyclopedia");
+  add_child (stack, "Enigma machine - Wikipedia, the free ecyclopedia");
+}
+
 int
 main (int argc, char *argv[])
 {
   GtkWidget *window;
+  GtkWidget *titlebar;
   GtkWidget *vbox;
   GtkWidget *tabs;
-  GtkWidget *box;
   GtkWidget *stack;
   GtkWidget *button;
 
   gtk_init (NULL, NULL);
 
   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  gtk_window_set_default_size (GTK_WINDOW (window), 600, 800);
+  titlebar = gtk_header_bar_new ();
+  gtk_header_bar_set_show_close_button (GTK_HEADER_BAR (titlebar), TRUE);
+  gtk_widget_show (titlebar);
+  gtk_window_set_titlebar (GTK_WINDOW (window), titlebar);
+  gtk_window_set_title (GTK_WINDOW (window), "Tab Strip Test");
 
   vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
 
@@ -51,19 +78,16 @@ main (int argc, char *argv[])
   gtk_tab_strip_set_closable (GTK_TAB_STRIP (tabs), TRUE);
   gtk_tab_strip_set_stack (GTK_TAB_STRIP (tabs), GTK_STACK (stack));
 
-  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
-  gtk_box_pack_start (GTK_BOX (box), tabs, TRUE, TRUE, 0);
-
   button = gtk_button_new_from_icon_name ("tab-new-symbolic", GTK_ICON_SIZE_BUTTON);
   gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
-  gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);
+  gtk_header_bar_pack_end (GTK_HEADER_BAR (titlebar), button);
   g_signal_connect_swapped (button, "clicked",
                             G_CALLBACK (add_stack_child), stack);
 
-  gtk_box_pack_start (GTK_BOX (vbox), box, FALSE, FALSE, 0);
+  gtk_box_pack_start (GTK_BOX (vbox), tabs, FALSE, FALSE, 0);
   gtk_box_pack_start (GTK_BOX (vbox), stack, TRUE, TRUE, 0);
 
-  add_stack_child (stack);
+  populate  (stack);
 
   gtk_widget_show_all (window);