Create basic GObject structure for GraphView

app/src/main.c

@@ -1,18 +1,48 @@
+/*
+ * This file is part of GtkGraphView.
+ *
+* Foobar is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License version 2 as
+* published by the Free Software Foundation.
+*
+* GtkGraphView is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with GtkGraphView. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 #include <stdio.h>
 #include <gtk/gtk.h>
 #include <gtk-graph-view.h>
 
+static gboolean main_window_delete_event(GtkWidget *window, gpointer user)
+{
+	(void)user;
+
+	gtk_widget_destroy(window);
+	gtk_main_quit();
+
+	return FALSE;
+}
+
 int main(int argc, char **argv)
 {
 	GtkWidget *main_window;
-
-	printf("Hello World!\n");
+	GtkWidget *graph_view;
 
 	gtk_init(&argc, &argv);
 
 	main_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
-	gtk_widget_show(main_window);
+	gtk_window_set_default_size(GTK_WINDOW(main_window), 800, 800);
+	g_signal_connect(main_window, "delete-event", G_CALLBACK(main_window_delete_event), NULL);
 
+	graph_view = gtk_graph_view_new();
+	gtk_container_add(GTK_CONTAINER(main_window), graph_view);
+
+	gtk_widget_show_all(main_window);
 	gtk_main();
 
 	return 0;