ryudo/showevent/sample.c

#include <X11/Intrinsic.h>

/*
 * Disclaimer: No I don't actually code like this but this is a simple,
 * "Quick-n-Dirty", plain, vanilla, "No ups, No extras" piece of code.
 */

main(argc, argv) int argc;
char** argv;
{
  Display* dpy;
  int screen;
  Window window;
  XEvent event;
  extern Boolean use_separate_lines;

  if (!(dpy = XOpenDisplay(""))) {
    printf("Failed to open display...\n");
    exit(1);
  }
  screen = DefaultScreen(dpy);

  window = XCreateSimpleWindow(
    dpy,
    RootWindow(dpy, screen),
    100,
    100,
    300,
    200,
    2,
    BlackPixel(dpy, screen),
    WhitePixel(dpy, screen));

  XSelectInput(
    dpy,
    window,
    KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
      EnterWindowMask | LeaveWindowMask | PointerMotionMask |
      PointerMotionHintMask | Button1MotionMask | Button2MotionMask |
      Button3MotionMask | Button4MotionMask | Button5MotionMask |
      ButtonMotionMask | KeymapStateMask | ExposureMask | VisibilityChangeMask |
      StructureNotifyMask | SubstructureNotifyMask | SubstructureRedirectMask |
      FocusChangeMask | PropertyChangeMask | ColormapChangeMask |
      OwnerGrabButtonMask);

  XMapWindow(dpy, window);

  /* set this to false to make ShowEvent take up less vertival space */
  use_separate_lines = True;

  while (1) {
    XNextEvent(dpy, &event);
    printf("Detail of %s event:\n", GetType(&event));
    ShowEvent(&event);
    printf("\n\n");
  }
}