D X11 example

x.d

import std.stdio;
import x11.X;
import x11.Xlib;
import std.algorithm;
import std.traits;

int main()
{
	Display *display;
	Window w;
	XEvent last_event;
	string msg = "Hello, World!";
	int screen;

	display = XOpenDisplay(null);
	if (display == null) {
		 puts("Cannot open display");
		 return 1;
	}

	screen = DefaultScreen(display);
	w = XCreateSimpleWindow(display, RootWindow(display, screen), 10, 10, 100, 100, 1,
													BlackPixel(display, screen), WhitePixel(display, screen));
	XSelectInput(display, w, ExposureMask | KeyPressMask);
	XMapWindow(display, w);

	while (true) {
		 XNextEvent(display, &last_event);
		 if (last_event.type == Expose) {
				XDrawString(display, w, DefaultGC(display, screen), 10, 50, cast(char*)msg, cast(int)msg.length);
		 }
		 if (last_event.type == KeyPress)
				break;
	}

	XCloseDisplay(display);
	return 0;
}