Add some examples to the GApplication docs

gio/tests/gapplication-example-open.c

@@ -0,0 +1,50 @@
+#include <gio/gio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void
+activate (GApplication *application)
+{
+  g_application_hold (application);
+  g_print ("activated\n");
+  g_application_release (application);
+}
+
+static void
+open (GApplication  *application,
+      GFile        **files,
+      gint           n_files,
+      const gchar   *hint)
+{
+  gint i;
+
+  g_application_hold (application);
+
+  for (i = 0; i < n_files; i++)
+    {
+      gchar *uri = g_file_get_uri (files[i]);
+      g_print ("open %s\n", uri);
+      g_free (uri);
+    }
+
+  g_application_release (application);
+}
+
+int
+main (int argc, char **argv)
+{
+  GApplication *app;
+  int status;
+
+  app = g_application_new ("org.gtk.TestApplication",
+                           G_APPLICATION_HANDLES_OPEN);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  g_signal_connect (app, "open", G_CALLBACK (open), NULL);
+  g_application_set_inactivity_timeout (app, 10000);
+
+  status = g_application_run (app, argc, argv);
+
+  g_object_unref (app);
+
+  return status;
+}