飛び交うカーソル。

gistfile1.c

#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

int main()
{
	Display *dpy = XOpenDisplay(NULL);
	int w = WidthOfScreen(XDefaultScreenOfDisplay(dpy));
	int h = HeightOfScreen(XDefaultScreenOfDisplay(dpy));
	int x=0, y=0;
	int mx=1, my=1;

	while(1)
	{
		XWarpPointer(dpy, None, DefaultRootWindow(dpy), 0, 0, 0, 0, x, y);
		XFlush(dpy);

		x += mx;
		y += my;

		if(x < 0 || w < x)
			mx *= -1;
		if(y < 0 || h < y)
			my *= -1;

		usleep(1000);
	}

	XCloseDisplay(dpy);

	return 0;
}