display.cpp

// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-

// "display.cpp"

// (c) OPAC Team, LIFL, January 2006

/* This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   
   Contact: cahon@lifl.fr
*/

#include <iostream>
#include <fstream>

#include <X11/Xlib.h>

#include "display.h"
#include "node.h"
#include "opt_route.h"

#define BORDER 20
#define RATIO 0.5

#define screen_width 1024
#define screen_height 768

static const char * filename;

/* Computed coordinates */
static unsigned * X_new_coord, * Y_new_coord ;

/* this variable will contain the handle to the returned graphics context. */
static GC gc;
  
/* this variable will contain the pointer to the Display structure */
static Display* disp;

/* this variable will store the ID of the newly created window. */
static Window win;

static int screen;

/* Create a new backing pixmap of the appropriate size */

  /* Best tour */
  /*
  gdk_gc_set_line_attributes (gc, 2,  GDK_LINE_ON_OFF_DASH, GDK_CAP_NOT_LAST, GDK_JOIN_MITER) ;

  gdk_gc_set_foreground  (gc, & color_green) ;      

  for (int i = 0 ; i < (int) numNodes ; i ++) {

    gdk_draw_line (pixmap, gc,
                   X_new_coord [opt_route [i]],
                   Y_new_coord [opt_route [i]],
                   X_new_coord [opt_route [(i + 1) % numNodes]],
                   Y_new_coord [opt_route [(i + 1) % numNodes]]);
    
                   }*/

void openMainWindow (const char * __filename) {

  filename = __filename;

  /* Map */
  int map_width = (int) (X_max - X_min);
  int map_height = (int) (Y_max - Y_min);
  int map_side = std :: max (map_width, map_height);
  
  /* Calculate the window's width and height. */
  int win_width = (int) (screen_width * RATIO * map_width / map_side);
  int win_height = (int) (screen_height * RATIO * map_height / map_side);

  /* Computing the coordinates */
  X_new_coord = new unsigned [numNodes];
  Y_new_coord = new unsigned [numNodes];

  for (unsigned i = 0; i < numNodes; i ++) {
    X_new_coord [i] = (unsigned) (win_width * (1.0 - (X_coord [i] - X_min) / map_width) + BORDER);
    Y_new_coord [i] = (unsigned) (win_height * (1.0 - (Y_coord [i] - Y_min) / map_height) + BORDER);
  }
  
  /* Initialisation */
  XGCValues val ;
  
  disp = XOpenDisplay (NULL) ;
  screen = DefaultScreen (disp) ;
  win = XCreateSimpleWindow (disp, RootWindow (disp, screen), 0, 0, win_width + 2 * BORDER, win_height + 2 * BORDER, 2, BlackPixel (disp, screen), WhitePixel (disp, screen)) ;
  val.foreground = BlackPixel(disp, screen) ;
  val.background = WhitePixel(disp, screen) ;
  gc = XCreateGC (disp, win, GCForeground | GCBackground, & val) ; 

  XMapWindow (disp, win) ;
  XFlush (disp) ;

  while (true) {
    XClearWindow (disp, win) ;

    /* Vertices as circles */
    for (unsigned i = 1 ; i < numNodes ; i ++)
      XDrawArc (disp, win, gc, X_new_coord [i] - 1, Y_new_coord [i] - 1, 3, 3, 0, 364 * 64) ;
    
    /* New tour */
    std :: ifstream f (filename);
    if (f) {
      Route route;
      f >> route;
      f.close ();
      
      for (int i = 0; i < (int) numNodes; i ++) 
        XDrawLine (disp, win, gc,     
                   X_new_coord [route [i]],
                 Y_new_coord [route [i]],
                   X_new_coord [route [(i + 1) % numNodes]],
                   Y_new_coord [route [(i + 1) % numNodes]]);  
    }
    XFlush (disp) ;    
    sleep (1) ;
  }
}

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