input_ip.cc

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/*
 * Roboception GmbH
 * Munich, Germany
 * www.roboception.com
 *
 * Copyright (c) 2024 Roboception GmbH
 * All rights reserved
 *
 * Author: Heiko Hirschmueller
 */
 
#include "input_ip.h"
 
#include <sstream>
 
InputIP::InputIP(int x, int y, int w, int h, const char *label) : Fl_Input(x, y, w, h, label)
{
  cb=0;
  user=0;
 
  tooltip("Format example: 10.123.4.5");
}
 
uint32_t InputIP::getIP()
{
  std::istringstream in(value());
 
  // read formated
 
  uint32_t v[4]={256, 256, 256, 256};
  char s[3]={' ', ' ', ' '};
  in >> v[0] >> s[0] >> v[1] >> s[1] >> v[2] >> s[2] >> v[3];
 
  // all separators must be '.'
 
  for (int i=0; i<3; i++)
  {
    if (s[i] != '.') return 0;
  }
 
  // its invalid if there is unparsed characters left
 
  if (!in.eof())
  {
    return 0;
  }
 
  // check validity of individual numbers
 
  for (int i=0; i<4; i++)
  {
    if (v[i] > 255) return 0;
  }
 
  // return IP as integer
 
  return ((v[0]<<24) | (v[1]<<16) | (v[2]<<8) | v[3]);
}
 
void InputIP::setIP(uint32_t v)
{
  std::ostringstream out;
 
  out << ((v>>24)&0xff) << '.' << ((v>>16)&0xff) << '.' << ((v>>8)&0xff) << '.' << (v&0xff);
 
  value(out.str().c_str());
}
 
int InputIP::handle(int event)
{
  if (event == FL_KEYBOARD && !(Fl::event_key() == FL_Tab))
  {
    char ascii=Fl::event_text()[0];
 
    if (std::isprint(ascii) && !isdigit(ascii) && ascii != '.')
    {
      return 1; // ignore all printable characters except accepted ones
    }
  }
 
  std::string v=value();
 
  // handle event in superclass
 
  int ret=Fl_Input::handle(event);
 
  // call callback if value has changed
 
  if (cb && v != value())
  {
    cb(this, user);
  }
 
  return ret;
}