Updated to work with GTK+-3 version 3.8 to support Ubuntu 13.10 build.

Author: mikebmcl

N3888_RefImpl/src/N3888_RefImpl.ui.h

@@ -30,7 +30,6 @@ library is available for download at:</property>
         <child internal-child="action_area">
           <object class="GtkButtonBox" id="dialog-action_area1">
             <property name="can_focus">False</property>
-            <property name="baseline_position">bottom</property>
             <property name="layout_style">end</property>
             <child>
               <object class="GtkButton" id="about_ok_button">

N3888_RefImpl/src/entrypoint-gtk.cpp

@@ -3,6 +3,7 @@
 #include <gtk/gtk.h>
 #include "N3888_RefImpl.ui.h"
 #include <assert.h>
+#include <stdexcept>
 
 GtkBuilder* g_builder;
 GtkWidget* g_main_window;
@@ -18,8 +19,13 @@ gboolean redraw_callback(gpointer user_data) {
 int main(int argc, char** argv) {
     gtk_init(&argc, &argv);
 
-    g_builder = gtk_builder_new_from_string(
-	g_n3888_ui_as_string, -1);
+    g_builder = gtk_builder_new();
+
+    auto result = gtk_builder_add_from_string(g_builder, g_n3888_ui_as_string, -1, nullptr);
+    if (result == 0) {
+      throw ::std::runtime_error("Failed call to gtk_builder_add_from_string.");
+    }
+
     g_main_window = GTK_WIDGET(gtk_builder_get_object(g_builder, "window"));
     assert(g_main_window != nullptr);
     g_drawingarea = GTK_WIDGET(gtk_builder_get_object(g_builder, "drawingarea"));

N3888_RefImpl/src/signals.cpp

@@ -1,5 +1,4 @@
 #include "signals.h"
-//#include <memory>
 #include <string>
 #include "drawing.h"
 #include <cairo.h>
@@ -93,5 +92,5 @@ G_MODULE_EXPORT void on_edit_screencapture_menuitem_activate(GtkMenuItem* menuit
 }
 
 G_MODULE_EXPORT void on_file_exit_menuitem_activate(GtkMenuItem* menuitem, gpointer user_data) {
-    gtk_window_close(GTK_WINDOW(g_main_window));
+    gtk_widget_destroy(GTK_WIDGET(g_main_window));
 }

configure.ac

@@ -8,5 +8,5 @@ AC_CONFIG_MACRO_DIR([m4])
 AC_LANG([C++])
 AX_CXX_COMPILE_STDCXX_11([noext], [mandatory])
 AX_CXXFLAGS_WARN_ALL
-PKG_CHECK_MODULES([GTKCAIRO], [gtk+-3.0 >= 3.10.0 gmodule-2.0 gobject-2.0 cairo >= 1.12.16])
+PKG_CHECK_MODULES([GTKCAIRO], [gtk+-3.0 >= 3.8.0 gmodule-2.0 gobject-2.0 cairo >= 1.12.16])
 AC_OUTPUT