reqtree.h

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/********************************************************************** 
 Freeciv - Copyright (C) 2005-2007 - The Freeciv Project
   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, or (at your option)
   any later version.
 
   This program 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 General Public License for more details.
***********************************************************************/
 
#ifndef FC__REQTREE_H
#define FC__REQTREE_H
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
#include "canvas_g.h"
 
/* Requirements Tree
 *
 * This file provides functions for drawing a tree-like graph of
 * requirements.  This can be used for creating an interactive diagram
 * showing the dependencies of various sources.
 *
 * A tree must first be created with create_reqtree; this will do all of the
 * calculations needed for the tree and is a fairly expensive operation.
 * After creating the tree, the other functions may be used to access or
 * draw it.
 *
 * Currently only techs are supported (as sources and requirements).
 */
 
struct reqtree;
 
struct reqtree *create_reqtree(struct player *pplayer, bool show_all);
void destroy_reqtree(struct reqtree *tree);
 
void get_reqtree_dimensions(struct reqtree *tree,
                            int *width, int *height);
 
void draw_reqtree(struct reqtree *tree,
                  struct canvas *pcanvas,
                  int canvas_x, int canvas_y,
                  int tt_x, int tt_y, int w, int h);
 
Tech_type_id get_tech_on_reqtree(struct reqtree *tree, int x, int y);
bool find_tech_on_reqtree(struct reqtree *tree, Tech_type_id tech,
                          int *x, int *y, int *w, int *h);
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* FC__REQTREE_H */