visible_line.cpp

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#ifndef VISIBLE_LINE_IMPLEMENTATION_FILE
#define VISIBLE_LINE_IMPLEMENTATION_FILE

/*****************************************************************************\
*                                                                             *
*  Name   : visible_line                                                      *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1991-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include "visible_line.h"
#include "wp_implementation.h"

visible_line::visible_line(canvas &draw_on, const c_line &init,
    const color &f, bool attach)
: paintable(draw_on, init.endpoint_1(), f, attach),
  c_line(init)
{}

c_line visible_line::base() const { return *this; }

c_rectangle visible_line::dimensions() const
{ return c_rectangle(endpoint_1(), endpoint_2()); }

void visible_line::base(const c_line &new_base)
{ 
  (c_line &)*this = new_base;
  drawable::set_origin(new_base.endpoint_1());
}

void visible_line::plot(const color &plot_in)
{
#ifdef __XWINDOWS__
  color to_plot_in = plot_in;
  if (to_plot_in.index() < 0) target().colormap().add(to_plot_in);
  XSetForeground(target().display(), target().details()._gc,
      to_plot_in.index());
  c_point dev_e1 = target().world_to_device(endpoint_1());
  c_point dev_e2 = target().world_to_device(endpoint_2());
  XDrawLine(target().display(), target().window(), target().details()._gc,
      int(dev_e1.x()), int(dev_e1.y()), int(dev_e2.x()), int(dev_e2.y()));
#elif defined(MS_WINDOWS)
#elif defined(OS_2)
#endif
}

void visible_line::set_origin(const c_point &new_origin)
{
  bool was_visible(visible());
  if (was_visible) erase();

  c_line new_dim(*this);
  new_dim += new_origin - drawable::origin();
  (c_line &)*this = new_dim;

  drawable::set_origin(new_origin);

  if (was_visible) draw();
}


#endif //VISIBLE_LINE_IMPLEMENTATION_FILE

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