layout.h

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/*
 * Roboception GmbH
 * Munich, Germany
 * www.roboception.com
 *
 * Copyright (c) 2024 Roboception GmbH
 * All rights reserved
 *
 * Author: Heiko Hirschmueller
 */
 
#ifndef RC_LAYOUT_H
#define RC_LAYOUT_H
 
#include <FL/Fl.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Widget.H>
 
#include <algorithm>
 
#define GAP_SIZE 10
 
inline int addRightX(int gap=GAP_SIZE)
{
  int n=Fl_Group::current()->children();
  if (n > 0)
  {
    Fl_Widget *c=Fl_Group::current()->child(n-1);
    return c->x()+c->w()+gap;
  }
 
  return gap;
}
 
inline int addRightY(int gap=GAP_SIZE)
{
  int n=Fl_Group::current()->children();
  if (n > 0)
  {
    Fl_Widget *c=Fl_Group::current()->child(n-1);
    return c->y();
  }
 
  return gap;
}
 
inline int addBelowX(int gap=GAP_SIZE)
{
  return gap;
}
 
inline int addBelowY(int gap=GAP_SIZE)
{
  int ret=gap;
  int n=Fl_Group::current()->children();
  for (int i=0; i<n; i++)
  {
    Fl_Widget *c=Fl_Group::current()->child(i);
    ret=std::max(ret, c->y()+c->h()+gap);
  }
 
  return ret;
}
 
inline void checkGroupSize(const char *group_name)
{
  int n=Fl_Group::current()->children();
  if (n > 0)
  {
    Fl_Group *g=Fl_Group::current();
    Fl_Widget *c=g->child(0);
 
    int xmin=c->x(), xmax=c->x()+c->w();
    int ymin=c->y(), ymax=c->y()+c->h();
 
    for (int i=1; i<n; i++)
    {
      c=g->child(i);
      xmin=std::min(xmin, c->x());
      xmax=std::max(xmax, c->x()+c->w());
      ymin=std::min(ymin, c->y());
      ymax=std::max(ymax, c->y()+c->h());
    }
 
    if ((g->w() != xmax+xmin && g->w() != xmax+xmin+GAP_SIZE) ||
      (g->h() != ymax+ymin && g->h() != ymax+ymin+GAP_SIZE))
    {
      Fl::warning("Size of group '%s' is %dx%d, but should be %dx%d!",
        group_name, g->w(), g->h(), xmax+xmin, ymax+ymin);
    }
  }
}
 
// Can be used to replace the first two arguments in the constructor of a new
// widget
 
#define ADD_RIGHT_XY addRightX(), addRightY()
#define ADD_BELOW_XY addBelowX(), addBelowY()
 
#endif