ocarina: Begin switching to GtkBuilder for the UI

I feel that hand-written UI code is slowing me down, so I'm going to
switch to using glade / GtkBuilder to manage the UI as much as possible.
So far, I create, show, and destroy a window.

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

Sconstruct

@@ -42,7 +42,7 @@ def symlink(target, source, env):
 SConscript(['include/Sconscript'])
 ocarina = env.Program('bin/ocarina-player', directory(["libsaria", "ocarina"]))
 oc_link = env.Command("ocarina.bin", "bin/ocarina-player", symlink)
-oc_other = app_directory("ocarina", ["scripts", "images"])
+oc_other = app_directory("ocarina", ["scripts", "images", "xml"])
 Default([ocarina, oc_link, oc_other])
 env.Alias("ocarina", [ocarina, oc_link, oc_other])
 

ocarina/Sconscript

@@ -2,6 +2,8 @@
 import config
 
 config.env.ParseConfig('pkg-config --cflags --libs gtk+-2.0')
+config.env.ParseConfig('pkg-config --cflags --libs gmodule-export-2.0')
 
-files = config.get_cpp_files()
+#files = config.get_cpp_files()
+files = ["ocarina/ocarina.cpp"]
 Return('files')

ocarina/ocarina.cpp

@@ -1,15 +1,21 @@
 // Copyright (c) 2011 Bryan Schumaker
 #include <version.h>
 #include <libsaria/libsaria.h>
+#include <libsaria/print.h>
+
+#include <gtk/gtk.h>
+
+/*#include <libsaria/libsaria.h>
 #include <libsaria/idle.h>
 
 #include <ocarina/playlist.h>
 #include <ocarina/ocarina.h>
 #include <ocarina/window.h>
-#include <ocarina/body.h>
+#include <ocarina/body.h>*/
 
 static string lib_path;
-static bool using_idle = false;
+static GtkBuilder *builder;
+//static bool using_idle = false;
 
 static void find_exe_path(string &res)
 {
@@ -41,7 +47,7 @@ static void find_lib_path()
 	println("Lib directory? %s", lib_path.c_str());
 }
 
-static gboolean idle(gpointer data)
+/*static gboolean idle(gpointer data)
 {
 	libsaria::idle::run_task();
 	using_idle = (libsaria::idle::size() != 0);
@@ -59,41 +65,55 @@ static void idle_add()
 		g_idle_add(idle, NULL);
 		using_idle = true;
 	}
-}
+} */
 
-namespace ocarina
+string lib_file(string path)
 {
-
-	string lib_file(string path)
-	{
-		string res = lib_path + "/" + path;
-		println("Expanding to path: " + res);
-		return res;
-	}
-
-	void quit()
-	{
-		gtk_main_quit();
-	}
-
+	string res = lib_path + "/" + path;
+	println("Expanding to path: " + res);
+	return res;
 }
 
+/*
 static gboolean timeout_poll(gpointer data)
 {
 	idle_add();
 	ocarina::body::set_now_playing();
 	ocarina::body::update_controls();
 	return TRUE;
+}*/
+
+GtkWidget *get_widget(const string &name)
+{
+	GtkWidget *widget = GTK_WIDGET(gtk_builder_get_object(builder, name.c_str()));
+	if (!widget)
+		println(name + " is not a widget!");
+	return widget;
+}
+
+void connect_signal(const string &name, const string &signal, GCallback func, void *data)
+{
+	GtkWidget *widget = get_widget(name);
+	if (widget)
+		g_signal_connect(widget, signal.c_str(), func, data);
 }
 
 static void init(int argc, char **argv)
 {
 	gtk_init(&argc, &argv);
-	ocarina::window::init();
+
+	builder = gtk_builder_new();
+	gtk_builder_add_from_file(builder, lib_file("ocarina.xml").c_str(), NULL);
+
+	/* Connect signals to named widgets */
+	connect_signal("MainWindow", "destroy", gtk_main_quit, NULL);
+
+	/* Show any widgets that need showing */
+/*	ocarina::window::init();
 	ocarina::body::init();
 	ocarina::playlist::init();
 	ocarina::init_pipe();
-	gtk_timeout_add(100, timeout_poll, NULL);
+	gtk_timeout_add(100, timeout_poll, NULL);*/
 }
 
 int main(int argc, char **argv)

xml/Sconscript

@@ -0,0 +1,17 @@
+#!/usr/bin/python
+import shutil
+from config import *
+
+lib = "../lib/" + application + "/%s"
+
+def copy_xml(target, source, env):
+	dst = str(target[0].rfile())
+	src = str(source[0].rfile())
+	shutil.copy(src, dst)
+
+files = []
+if application == "ocarina":
+	dst = lib % "ocarina.xml"
+	files.append(AlwaysBuild(env.Command(dst, "ocarina.xml", copy_xml)))
+
+Return('files')

xml/ocarina.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.0 -->
+  <object class="GtkWindow" id="MainWindow">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <child>
+      <placeholder/>
+    </child>
+  </object>
+</interface>