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Дата изменения: Fri Jul 19 21:51:58 2002
Дата индексирования: Tue Oct 2 02:28:38 2012
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Поисковые слова: manicouagan crater
Code Examples

Appendix C. Code Examples

Below are the code examples that are used in the above text which are not included in complete form elsewhere.

C.1. Tictactoe

C.1.1. tictactoe.h


/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */
#ifndef __TICTACTOE_H__
#define __TICTACTOE_H__


#include <gdk/gdk.h>
#include <gtk/gtkvbox.h>


#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define TICTACTOE(obj)          GTK_CHECK_CAST (obj, tictactoe_get_type (), Tictactoe)
#define TICTACTOE_CLASS(klass)  GTK_CHECK_CLASS_CAST (klass, tictactoe_get_type (), TictactoeClass)
#define IS_TICTACTOE(obj)       GTK_CHECK_TYPE (obj, tictactoe_get_type ())


typedef struct _Tictactoe       Tictactoe;
typedef struct _TictactoeClass  TictactoeClass;

struct _Tictactoe
{
  GtkVBox vbox;
  
  GtkWidget *buttons[3][3];
};

struct _TictactoeClass
{
  GtkVBoxClass parent_class;

  void (* tictactoe) (Tictactoe *ttt);
};

GtkType        tictactoe_get_type        (void);
GtkWidget*     tictactoe_new             (void);
void	       tictactoe_clear           (Tictactoe *ttt);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __TICTACTOE_H__ */

C.1.2. tictactoe.c


/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */
#include "gtk/gtksignal.h"
#include "gtk/gtktable.h"
#include "gtk/gtktogglebutton.h"
#include "tictactoe.h"

enum {
  TICTACTOE_SIGNAL,
  LAST_SIGNAL
};

static void tictactoe_class_init          (TictactoeClass *klass);
static void tictactoe_init                (Tictactoe      *ttt);
static void tictactoe_toggle              (GtkWidget *widget, Tictactoe *ttt);

static gint tictactoe_signals[LAST_SIGNAL] = { 0 };

GType
tictactoe_get_type ()
{
  static GType ttt_type = 0;

  if (!ttt_type)
    {
      static const GTypeInfo ttt_info =
      {
	sizeof (TictactoeClass),
	NULL,
        NULL,
	(GClassInitFunc) tictactoe_class_init,
        NULL,
	NULL,
        sizeof (Tictactoe),
	0,
	(GInstanceInitFunc) tictactoe_init,
      };

      ttt_type = g_type_register_static (GTK_TYPE_VBOX, "Tictactoe", &ttt_info, 0);
    }

  return ttt_type;
}

static void
tictactoe_class_init (TictactoeClass *class)
{
  GtkObjectClass *object_class;

  object_class = (GtkObjectClass*) class;
  
  tictactoe_signals[TICTACTOE_SIGNAL] = g_signal_new ("tictactoe",
					 G_TYPE_FROM_CLASS (object_class),
	                                 G_SIGNAL_RUN_FIRST,
	                                 0,
                                         NULL, 
                                         NULL,                
					 g_cclosure_marshal_VOID__VOID,
                                         G_TYPE_NONE, 0, NULL);


  class->tictactoe = NULL;
}

static void
tictactoe_init (Tictactoe *ttt)
{
  GtkWidget *table;
  gint i,j;
  
  table = gtk_table_new (3, 3, TRUE);
  gtk_container_add (GTK_CONTAINER (ttt), table);
  gtk_widget_show (table);

  for (i = 0; i < 3; i++)
    for (j = 0; j < 3; j++)
      {
	ttt->buttons[i][j] = gtk_toggle_button_new ();
	gtk_table_attach_defaults (GTK_TABLE (table), ttt->buttons[i][j], 
				   i, i+1, j, j+1);
	g_signal_connect (G_OBJECT (ttt->buttons[i][j]), "toggled",
			  G_CALLBACK (tictactoe_toggle), ttt);
	gtk_widget_set_size_request (ttt->buttons[i][j], 20, 20);
	gtk_widget_show (ttt->buttons[i][j]);
      }
}

GtkWidget*
tictactoe_new ()
{
  return GTK_WIDGET (g_object_new (tictactoe_get_type (), NULL));
}

void	       
tictactoe_clear (Tictactoe *ttt)
{
  int i,j;

  for (i = 0; i < 3; i++)
    for (j = 0; j < 3; j++)
      {
	g_signal_handlers_block_by_func (G_OBJECT (ttt->buttons[i][j]), 
                                         NULL, ttt);
	gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (ttt->buttons[i][j]),
				      FALSE);
	g_signal_handlers_unblock_by_func (G_OBJECT (ttt->buttons[i][j]), 
                                           NULL, ttt);
      }
}

static void
tictactoe_toggle (GtkWidget *widget, Tictactoe *ttt)
{
  int i,k;

  static int rwins[8][3] = { { 0, 0, 0 }, { 1, 1, 1 }, { 2, 2, 2 },
			     { 0, 1, 2 }, { 0, 1, 2 }, { 0, 1, 2 },
			     { 0, 1, 2 }, { 0, 1, 2 } };
  static int cwins[8][3] = { { 0, 1, 2 }, { 0, 1, 2 }, { 0, 1, 2 },
			     { 0, 0, 0 }, { 1, 1, 1 }, { 2, 2, 2 },
			     { 0, 1, 2 }, { 2, 1, 0 } };

  int success, found;

  for (k = 0; k < 8; k++)
    {
      success = TRUE;
      found = FALSE;

      for (i = 0; i < 3; i++)
	{
	  success = success && 
	    GTK_TOGGLE_BUTTON (ttt->buttons[rwins[k][i]][cwins[k][i]])->active;
	  found = found ||
	    ttt->buttons[rwins[k][i]][cwins[k][i]] == widget;
	}
      
      if (success && found)
	{
	  g_signal_emit (G_OBJECT (ttt), 
	                 tictactoe_signals[TICTACTOE_SIGNAL], 0);
	  break;
	}
    }
}