+ gtk_grid_attach (GTK_GRID (grid), button, 3, 2, 1, 1);
+ gtk_widget_show (button);
+
+ button = gtk_button_new_with_label ("More transparent");
+ g_signal_connect (button, "clicked",
+ G_CALLBACK (alpha_clicked),
+ GINT_TO_POINTER (-1));
+ gtk_grid_attach (GTK_GRID (grid), button, 0, 3, 1, 1);
+ gtk_widget_show (button);
+
+ button = gtk_button_new_with_label ("Less transparent");
+ g_signal_connect (button, "clicked",
+ G_CALLBACK (alpha_clicked),
+ GINT_TO_POINTER (1));
+ gtk_grid_attach (GTK_GRID (grid), button, 1, 3, 1, 1);