Add some examples to the GApplication docs

gio/tests/gapplication-example-cmdline.c

@@ -0,0 +1,47 @@
+#include <gio/gio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int
+command_line (GApplication            *application,
+              GApplicationCommandLine *cmdline)
+{
+  gchar **argv;
+  gint argc;
+  gint i;
+
+  g_application_hold (application);
+
+  argv = g_application_command_line_get_arguments (cmdline, &argc);
+
+  g_application_command_line_print (cmdline,
+                                    "This text is written back\n"
+                                    "to stdout of the caller\n");
+
+  for (i = 0; i < argc; i++)
+    g_print ("argument %d: %s\n", i, argv[i]);
+
+  g_strfreev (argv);
+
+  g_application_release (application);
+
+  return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  GApplication *app;
+  int status;
+
+  app = g_application_new ("org.gtk.TestApplication",
+                           G_APPLICATION_HANDLES_COMMAND_LINE);
+  g_signal_connect (app, "command-line", G_CALLBACK (command_line), NULL);
+  g_application_set_inactivity_timeout (app, 10000);
+
+  status = g_application_run (app, argc, argv);
+
+  g_object_unref (app);
+
+  return status;
+}