Clutter in D test 1

module test2;

import std.stdio;
import std.string,
    std.conv;
import gtkc.gobject,
    gtkc.gobjecttypes;
import ccb.SharedLibrary;

enum ClutterInitError {
  SUCCESS  =  1,
  UNKNOWN  =  0,
  THREADS  = -1,
  BACKEND  = -2,
  INTERNAL = -3
}

struct ClutterActor { uint flags; }
struct ClutterStage {}
struct ClutterContainer {}
struct ClutterColor { ubyte red, green, blue, alpha; }

char* cstring(string s) { return cast(char*)toStringz(s); }

void main(string[] args)
{

    auto clutter = new SharedLibrary("libclutter-glx-1.0.so", RTLD_NOW | RTLD_GLOBAL);

    auto clutter_init = clutter.getSymbol!(ClutterInitError function(int*, char***))("clutter_init");
    auto clutter_main = clutter.getSymbol!(void function())("clutter_main");
    auto clutter_main_quit = clutter.getSymbol!(void function())("clutter_main_quit");

    auto clutter_stage_get_default = clutter.getSymbol!(ClutterActor* function())("clutter_stage_get_default");
    auto clutter_actor_set_size = clutter.getSymbol!(void function(ClutterActor*, float, float))("clutter_actor_set_size");
    auto clutter_actor_show_all = clutter.getSymbol!(void function(ClutterActor*))("clutter_actor_show_all");

    auto clutter_text_new_full = clutter.getSymbol!(ClutterActor* function(char*, char*, ClutterColor*))("clutter_text_new_full");
    auto clutter_container_add_actor = clutter.getSymbol!(void function(ClutterContainer*, ClutterActor*))("clutter_container_add_actor");


    auto err = clutter_init(null, null);

    writeln(to!string(err));
    if (err != ClutterInitError.SUCCESS)
        return;

    ClutterActor*   stage;
    ClutterActor*   textbox;
    ClutterColor    txtColor = { 0, 0, 100, 255};

    stage = clutter_stage_get_default();
    clutter_actor_set_size(stage, 400, 400);

    textbox = clutter_text_new_full(cstring("Sans 24"), cstring("Hello, world"), &txtColor);
    clutter_container_add_actor(cast(ClutterContainer*)stage, textbox);

    clutter_actor_show_all(stage);

    g_signal_connect_object(stage, cstring("key-press-event"),
            cast(GCallback)clutter_main_quit, null, cast(GConnectFlags)0);

    clutter_main();
}