planarity/gameboard_draw_selection.c

   1 /*
   2  *
   3  *  gPlanarity:
   4  *     The geeky little puzzle game with a big noodly crunch!
   5  *
   6  *     gPlanarity copyright (C) 2005 Monty <monty@xiph.org>
   7  *     Original Flash game by John Tantalo <john.tantalo@case.edu>
   8  *     Original game concept by Mary Radcliffe
   9  *
  10  *  gPlanarity is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2, or (at your option)
  13  *  any later version.
  14  *
  15  *  gPlanarity is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with Postfish; see the file COPYING.  If not, write to the
  22  *  Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  *
  25  */
  26
  27 #define _GNU_SOURCE
  28 #include <gtk/gtk.h>
  29 #include <gtk/gtkmain.h>
  30 #include <gdk/gdk.h>
  31 #include <gdk/gdkx.h>
  32 #include <stdlib.h>
  33 #include <math.h>
  34 #include <string.h>
  35
  36 #include "graph.h"
  37 #include "gameboard.h"
  38
  39
  40 // draw selection box
  41 void draw_selection_rectangle(Gameboard *g,cairo_t *c){
  42   cairo_set_source_rgba(c,SELECTBOX_COLOR);
  43   cairo_rectangle(c,g->selectionx,
  44                   g->selectiony,
  45                   g->selectionw,
  46                   g->selectionh);
  47   cairo_fill(c);
  48 }
  49
  50 // invalidate the selection box plus enough area to catch any verticies
  51 void invalidate_selection(GtkWidget *widget){
  52   Gameboard *g = GAMEBOARD (widget);
  53   GdkRectangle r;
  54   r.x = g->selectionx - (V_RADIUS + V_LINE)*2;
  55   r.y = g->selectiony - (V_RADIUS + V_LINE)*2;
  56   r.width =  g->selectionw + (V_RADIUS + V_LINE)*4;
  57   r.height = g->selectionh + (V_RADIUS + V_LINE)*4;
  58
  59   gdk_window_invalidate_rect (widget->window, &r, FALSE);
  60 }
  61
  62 // invalidate the selection box plus enough area to catch any verticies
  63 void invalidate_verticies_selection(GtkWidget *widget){
  64   Gameboard *g = GAMEBOARD (widget);
  65   vertex *v=g->g.verticies;
  66   while(v){
  67     if(v->selected){
  68       invalidate_vertex_off(widget,v,g->dragx,g->dragy);
  69       invalidate_edges(widget,v,g->dragx,g->dragy);
  70     }
  71     v=v->next;
  72   }
  73 }