Autoclick

autoclick.c

// Written by Pioz.
// Compile with: gcc -o autoclick autoclick.c -lX11

#include <stdio.h>     // printf, fprintf and fflush
#include <string.h>    // memset
#include <unistd.h>    // sleep and usleep
#include <X11/Xlib.h>  // X11
#include <X11/Xutil.h> // XGetPixel and XDestroyImage

// Simulate mouse click
void
click (Display *display, int button)
{
  // Create and setting up the event
  XEvent event;
  memset (&event, 0, sizeof (event));
  event.xbutton.button = button;
  event.xbutton.same_screen = True;
  event.xbutton.subwindow = DefaultRootWindow (display);
  while (event.xbutton.subwindow)
    {
      event.xbutton.window = event.xbutton.subwindow;
      XQueryPointer (display, event.xbutton.window,
		     &event.xbutton.root, &event.xbutton.subwindow,
		     &event.xbutton.x_root, &event.xbutton.y_root,
		     &event.xbutton.x, &event.xbutton.y,
		     &event.xbutton.state);
    }
  // Press
  event.type = ButtonPress;
  if (XSendEvent (display, PointerWindow, True, ButtonPressMask, &event) == 0)
    fprintf (stderr, "Error to send the event!\n");
  XFlush (display);
  usleep (1);
  // Release
  event.type = ButtonRelease;
  if (XSendEvent (display, PointerWindow, True, ButtonReleaseMask, &event) == 0)
    fprintf (stderr, "Error to send the event!\n");
  XFlush (display);
  usleep (1);
}

// Get mouse coordinates
void
coords (Display *display, int *x, int *y)
{
  XEvent event;
  XQueryPointer (display, DefaultRootWindow (display),
                 &event.xbutton.root, &event.xbutton.window,
                 &event.xbutton.x_root, &event.xbutton.y_root,
                 &event.xbutton.x, &event.xbutton.y,
                 &event.xbutton.state);
  *x = event.xbutton.x;
  *y = event.xbutton.y;
}

// Move mouse pointer (relative)
void
move (Display *display, int x, int y)
{
  XWarpPointer (display, None, None, 0,0,0,0, x, y);
  XFlush (display);
  usleep (1);
}

// Move mouse pointer (absolute)
void
move_to (Display *display, int x, int y)
{
  int cur_x, cur_y;
  coords (display, &cur_x, &cur_y);
  XWarpPointer (display, None, None, 0,0,0,0, -cur_x, -cur_y);
  XWarpPointer (display, None, None, 0,0,0,0, x, y);
  usleep (1);
}

// Get pixel color at coordinates x,y
void
pixel_color (Display *display, int x, int y, XColor *color)
{
  XImage *image;
  image = XGetImage (display, DefaultRootWindow (display), x, y, 1, 1, AllPlanes, XYPixmap);
  color->pixel = XGetPixel (image, 0, 0);
  XDestroyImage (image);
  XQueryColor (display, DefaultColormap(display, DefaultScreen (display)), color);
}

// START HERE
int
main (int argc, char *argv[])
{ 
  int starting = 3;
  int x = 0;
  int y = 0;

  // Open X display
  Display *display = XOpenDisplay (NULL);
  if (display == NULL)
    {
      fprintf (stderr, "Can't open display!\n");
      return -1;
    }
  
  // Wait 3 seconds to start
  printf ("Starting in   ");
  fflush (stdout);
  while (starting > 0)
    {
      printf ("\b\b\b %d...", starting);
      fflush (stdout);
      sleep (1);
      starting--;
    }
  printf ("\n");

  // Start
  while (1)
    {
      click (display, Button1);
      //move (display, x, y);
      //coords (dispaly, &x, &y);
      sleep (1);
    }

  // Close X display and exit
  XCloseDisplay (display);
  return 0;
}

click method core dumped

Thank you so much for this code :)

Hey, Pioz.
This is some very useful code.
Do you know by any chane how to use the XEvents for clicking with another pointer device (that was created by e.g xinput create-master mouse)?

I got this (compile with gcc -lXi -lX11 -lXtst -o test BackgroundMouse.c):

#include <X11/Xlib.h>
#include <X11/extensions/XInput2.h>
#include <X11/extensions/XTest.h>
int main (int argc, char *argv[])
{
  int delta_x = 500, delta_y = 160;
  Display *display = XOpenDisplay(0);
  Window root = DefaultRootWindow(display);
  XIWarpPointer(display, 14, None, root, 0, 0, 0, 0, delta_x, delta_y);
  XDevice *device = NULL;
  device = XOpenDevice(display, 16);
  XTestFakeDeviceButtonEvent(display, device, 1, True, 0, 0, CurrentTime);
  XTestFakeDeviceButtonEvent(display, device, 1, False, 0, 0, CurrentTime);
  XCloseDisplay(display);
}

but the difference between XTestFakeDeviceButtonEvent and your XEvent code for clicking is that your code can click without giving focus to a window but XTestFakeDeviceButtonEvent gives focus which is not useful for a auto clicker that should run in the background while I use my main virtual pointer for working on different stuff..

Thanks for the code, but does anyone have idea why this clicker wont click in chromium browser? It works in desktop apps.

@vaizq jordansissel/xdotool#330 (comment)