/*
*
* gPlanarity:
* The geeky little puzzle game with a big noodly crunch!
*
* gPlanarity copyright (C) 2005 Monty <monty@xiph.org>
* Original Flash game by John Tantalo <john.tantalo@case.edu>
* Original game concept by Mary Radcliffe
*
* gPlanarity 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.
*
* gPlanarity 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.
*
* You should have received a copy of the GNU General Public License
* along with Postfish; see the file COPYING. If not, write to the
* Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*/
#define _GNU_SOURCE
#include <gtk/gtk.h>
#include <gtk/gtkmain.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include "graph.h"
#include "gameboard.h"
/******** draw edges ********************************************/
void setup_background_edge(cairo_t *c){
cairo_set_line_width(c,E_LINE);
cairo_set_source_rgba(c,E_LINE_B_COLOR);
}
void setup_foreground_edge(cairo_t *c){
cairo_set_line_width(c,E_LINE);
cairo_set_source_rgba(c,E_LINE_F_COLOR);
}
void draw_edge(cairo_t *c,edge *e){
cairo_move_to(c,e->A->x,e->A->y);
cairo_line_to(c,e->B->x,e->B->y);
}
void finish_edge(cairo_t *c){
cairo_stroke(c);
}
void draw_edges(cairo_t *c, vertex *v, int offx, int offy){
if(v){
edge_list *el=v->edges;
while (el){
edge *e=el->edge;
if(e->A->grabbed==0 || e->B->grabbed==0 || v==e->A){
if(e->A->grabbed)
cairo_move_to(c,e->A->x+offx,e->A->y+offy);
else
cairo_move_to(c,e->A->x,e->A->y);
if(e->B->grabbed)
cairo_line_to(c,e->B->x+offx,e->B->y+offy);
else
cairo_line_to(c,e->B->x,e->B->y);
}
el=el->next;
}
}
}
/* invalidate edge region for efficient expose *******************/
void invalidate_edges(GtkWidget *widget, vertex *v, int offx, int offy){
GdkRectangle r;
if(v){
edge_list *el=v->edges;
while (el){
edge *e=el->edge;
if(e->A->grabbed==0 || e->B->grabbed==0 || v==e->A){
int Ax = e->A->x + (e->A->grabbed?offx:0);
int Ay = e->A->y + (e->A->grabbed?offy:0);
int Bx = e->B->x + (e->B->grabbed?offx:0);
int By = e->B->y + (e->B->grabbed?offy:0);
r.x = min(Ax,Bx) - E_LINE;
r.y = min(Ay,By) - E_LINE;
r.width = labs(Bx - Ax) + 1 + E_LINE*2;
r.height = labs(By - Ay) + 1 + E_LINE*2;
gdk_window_invalidate_rect (widget->window, &r, FALSE);
}
el=el->next;
}
}
}