CKeyboard.cc

#include "CKeyboard.h"
//#include <libudev.h>
//#include <stdio.h>
#include <string.h>
#include <unistd.h> //usleep
#include <fcntl.h>
#include <errno.h>
#include <linux/input.h>


CKeyboard::CKeyboard(std::string _eventPath)
{
  eventPath = _eventPath;
  fd = open(eventPath.c_str(), O_RDONLY);
  if(fd == -1)
    {
      fprintf(stderr, "KEYBOARD: Cannot open %s: %s.\n", eventPath.c_str(), strerror(errno));
    }
}

CKeyboard::~CKeyboard()
{
  if(fd>-1) close(fd);
}

std::string CKeyboard::getEventPath()
{
  return eventPath;
}

bool CKeyboard::isOpen()
{
  if(fd>-1) return true;

  return false;
}

bool CKeyboard::readEvent(CKeyboardEvent* _keyEvent)
{
  /*
    static const char *const evval[3] = {
    "RELEASED",
    "PRESSED ",
    "REPEATED"
    };
  */

  if(fd<0) return false;

  struct input_event ev;
  ssize_t n;
  n = read(fd, &ev, sizeof ev);
  if(n == ((ssize_t) - 1) || n!= sizeof(ev)) return false;

  if(ev.type == EV_KEY && ev.value>=0 && ev.value<=2 && ev.value!=2)
    {
      _keyEvent->isPressed = ev.value;
      _keyEvent->code = ev.code;
      //printf("%s 0x%04x (%d) %d\n", evval[ev.value], (int)ev.code, (int)ev.code, (ev.code == KEY_Q ? 1 : 0));
      return true;
    }

  return false;
}