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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
#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);
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);
#endif
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