Pileus Git - ~andy/gtk/blob - gtk/gtkradiobutton.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gtklabel.h"
  28 #include "gtkradiobutton.h"
  29 #include "gtksignal.h"
  30
  31
  32 enum {
  33   ARG_0,
  34   ARG_GROUP
  35 };
  36
  37
  38 static void gtk_radio_button_class_init     (GtkRadioButtonClass  *klass);
  39 static void gtk_radio_button_init           (GtkRadioButton       *radio_button);
  40 static void gtk_radio_button_destroy        (GtkObject            *object);
  41 static void gtk_radio_button_clicked        (GtkButton            *button);
  42 static void gtk_radio_button_draw_indicator (GtkCheckButton       *check_button,
  43                                              GdkRectangle         *area);
  44 static void gtk_radio_button_set_arg        (GtkObject            *object,
  45                                              GtkArg               *arg,
  46                                              guint                 arg_id);
  47 static void gtk_radio_button_get_arg        (GtkObject            *object,
  48                                              GtkArg               *arg,
  49                                              guint                 arg_id);
  50
  51
  52 static GtkCheckButtonClass *parent_class = NULL;
  53
  54
  55 GtkType
  56 gtk_radio_button_get_type (void)
  57 {
  58   static GtkType radio_button_type = 0;
  59
  60   if (!radio_button_type)
  61     {
  62       static const GtkTypeInfo radio_button_info =
  63       {
  64         "GtkRadioButton",
  65         sizeof (GtkRadioButton),
  66         sizeof (GtkRadioButtonClass),
  67         (GtkClassInitFunc) gtk_radio_button_class_init,
  68         (GtkObjectInitFunc) gtk_radio_button_init,
  69         /* reserved_1 */ NULL,
  70         /* reserved_2 */ NULL,
  71         (GtkClassInitFunc) NULL,
  72       };
  73
  74       radio_button_type = gtk_type_unique (gtk_check_button_get_type (), &radio_button_info);
  75     }
  76
  77   return radio_button_type;
  78 }
  79
  80 static void
  81 gtk_radio_button_class_init (GtkRadioButtonClass *class)
  82 {
  83   GtkObjectClass *object_class;
  84   GtkButtonClass *button_class;
  85   GtkCheckButtonClass *check_button_class;
  86
  87   object_class = (GtkObjectClass*) class;
  88   button_class = (GtkButtonClass*) class;
  89   check_button_class = (GtkCheckButtonClass*) class;
  90
  91   parent_class = gtk_type_class (gtk_check_button_get_type ());
  92
  93   gtk_object_add_arg_type ("GtkRadioButton::group", GTK_TYPE_RADIO_BUTTON, GTK_ARG_WRITABLE, ARG_GROUP);
  94
  95   object_class->set_arg = gtk_radio_button_set_arg;
  96   object_class->get_arg = gtk_radio_button_get_arg;
  97   object_class->destroy = gtk_radio_button_destroy;
  98
  99   button_class->clicked = gtk_radio_button_clicked;
 100
 101   check_button_class->draw_indicator = gtk_radio_button_draw_indicator;
 102 }
 103
 104 static void
 105 gtk_radio_button_init (GtkRadioButton *radio_button)
 106 {
 107   GTK_WIDGET_SET_FLAGS (radio_button, GTK_NO_WINDOW);
 108   GTK_WIDGET_UNSET_FLAGS (radio_button, GTK_RECEIVES_DEFAULT);
 109
 110   GTK_TOGGLE_BUTTON (radio_button)->active = TRUE;
 111
 112   radio_button->group = g_slist_prepend (NULL, radio_button);
 113
 114   gtk_widget_set_state (GTK_WIDGET (radio_button), GTK_STATE_ACTIVE);
 115 }
 116
 117 static void
 118 gtk_radio_button_set_arg (GtkObject      *object,
 119                           GtkArg         *arg,
 120                           guint           arg_id)
 121 {
 122   GtkRadioButton *radio_button;
 123
 124   radio_button = GTK_RADIO_BUTTON (object);
 125
 126   switch (arg_id)
 127     {
 128       GSList *slist;
 129
 130     case ARG_GROUP:
 131       if (GTK_VALUE_OBJECT (*arg))
 132         slist = gtk_radio_button_group ((GtkRadioButton*) GTK_VALUE_OBJECT (*arg));
 133       else
 134         slist = NULL;
 135       gtk_radio_button_set_group (radio_button, slist);
 136       break;
 137     default:
 138       break;
 139     }
 140 }
 141
 142 static void
 143 gtk_radio_button_get_arg (GtkObject      *object,
 144                           GtkArg         *arg,
 145                           guint           arg_id)
 146 {
 147   GtkRadioButton *radio_button;
 148
 149   radio_button = GTK_RADIO_BUTTON (object);
 150
 151   switch (arg_id)
 152     {
 153     default:
 154       arg->type = GTK_TYPE_INVALID;
 155       break;
 156     }
 157 }
 158
 159 void
 160 gtk_radio_button_set_group (GtkRadioButton *radio_button,
 161                             GSList         *group)
 162 {
 163   g_return_if_fail (radio_button != NULL);
 164   g_return_if_fail (GTK_IS_RADIO_BUTTON (radio_button));
 165   g_return_if_fail (!g_slist_find (group, radio_button));
 166
 167   if (radio_button->group)
 168     {
 169       GSList *slist;
 170
 171       radio_button->group = g_slist_remove (radio_button->group, radio_button);
 172
 173       for (slist = radio_button->group; slist; slist = slist->next)
 174         {
 175           GtkRadioButton *tmp_button;
 176
 177           tmp_button = slist->data;
 178
 179           tmp_button->group = radio_button->group;
 180         }
 181     }
 182
 183   radio_button->group = g_slist_prepend (group, radio_button);
 184
 185   if (group)
 186     {
 187       GSList *slist;
 188
 189       for (slist = group; slist; slist = slist->next)
 190         {
 191           GtkRadioButton *tmp_button;
 192
 193           tmp_button = slist->data;
 194
 195           tmp_button->group = radio_button->group;
 196         }
 197     }
 198
 199   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (radio_button), group == NULL);
 200 }
 201
 202 GtkWidget*
 203 gtk_radio_button_new (GSList *group)
 204 {
 205   GtkRadioButton *radio_button;
 206
 207   radio_button = gtk_type_new (gtk_radio_button_get_type ());
 208
 209   if (group)
 210     gtk_radio_button_set_group (radio_button, group);
 211
 212   return GTK_WIDGET (radio_button);
 213 }
 214
 215 GtkWidget*
 216 gtk_radio_button_new_with_label (GSList      *group,
 217                                  const gchar *label)
 218 {
 219   GtkWidget *radio_button;
 220   GtkWidget *label_widget;
 221
 222   radio_button = gtk_radio_button_new (group);
 223   label_widget = gtk_label_new (label);
 224   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 225
 226   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 227   gtk_widget_show (label_widget);
 228
 229   return radio_button;
 230 }
 231
 232
 233 /**
 234  * gtk_radio_button_new_with_mnemonic:
 235  * @group: the radio button group
 236  * @label: the text of the button, with an underscore in front of the
 237  *         mnemonic character
 238  * @returns: a new #GtkRadioButton
 239  *
 240  * Creates a new #GtkRadioButton containing a label. The label
 241  * will be created using gtk_label_new_with_mnemonic(), so underscores
 242  * in @label indicate the mnemonic for the button.
 243  **/
 244 GtkWidget*
 245 gtk_radio_button_new_with_mnemonic (GSList      *group,
 246                                     const gchar *label)
 247 {
 248   GtkWidget *radio_button;
 249   GtkWidget *label_widget;
 250
 251   radio_button = gtk_radio_button_new (group);
 252   label_widget = gtk_label_new_with_mnemonic (label);
 253   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 254
 255   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 256   gtk_widget_show (label_widget);
 257
 258   return radio_button;
 259 }
 260
 261 GtkWidget*
 262 gtk_radio_button_new_from_widget (GtkRadioButton *group)
 263 {
 264   GSList *l = NULL;
 265   if (group)
 266     l = gtk_radio_button_group (group);
 267   return gtk_radio_button_new (l);
 268 }
 269
 270
 271 GtkWidget*
 272 gtk_radio_button_new_with_label_from_widget (GtkRadioButton *group,
 273                                              const gchar    *label)
 274 {
 275   GSList *l = NULL;
 276   if (group)
 277     l = gtk_radio_button_group (group);
 278   return gtk_radio_button_new_with_label (l, label);
 279 }
 280
 281 /**
 282  * gtk_radio_button_new_with_mnemonic_from_widget:
 283  * @group: widget to get radio group from
 284  * @label: the text of the button, with an underscore in front of the
 285  *         mnemonic character
 286  * @returns: a new #GtkRadioButton
 287  *
 288  * Creates a new #GtkRadioButton containing a label. The label
 289  * will be created using gtk_label_new_with_mnemonic(), so underscores
 290  * in @label indicate the mnemonic for the button.
 291  **/
 292 GtkWidget*
 293 gtk_radio_button_new_with_mnemonic_from_widget (GtkRadioButton *group,
 294                                                 const gchar    *label)
 295 {
 296   GSList *l = NULL;
 297   if (group)
 298     l = gtk_radio_button_group (group);
 299   return gtk_radio_button_new_with_mnemonic (l, label);
 300 }
 301
 302 GSList*
 303 gtk_radio_button_group (GtkRadioButton *radio_button)
 304 {
 305   g_return_val_if_fail (radio_button != NULL, NULL);
 306   g_return_val_if_fail (GTK_IS_RADIO_BUTTON (radio_button), NULL);
 307
 308   return radio_button->group;
 309 }
 310
 311
 312 static void
 313 gtk_radio_button_destroy (GtkObject *object)
 314 {
 315   GtkRadioButton *radio_button;
 316   GtkRadioButton *tmp_button;
 317   GSList *tmp_list;
 318
 319   g_return_if_fail (object != NULL);
 320   g_return_if_fail (GTK_IS_RADIO_BUTTON (object));
 321
 322   radio_button = GTK_RADIO_BUTTON (object);
 323
 324   radio_button->group = g_slist_remove (radio_button->group, radio_button);
 325   tmp_list = radio_button->group;
 326
 327   while (tmp_list)
 328     {
 329       tmp_button = tmp_list->data;
 330       tmp_list = tmp_list->next;
 331
 332       tmp_button->group = radio_button->group;
 333     }
 334
 335   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 336     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 337 }
 338
 339 static void
 340 gtk_radio_button_clicked (GtkButton *button)
 341 {
 342   GtkToggleButton *toggle_button;
 343   GtkRadioButton *radio_button;
 344   GtkToggleButton *tmp_button;
 345   GtkStateType new_state;
 346   GSList *tmp_list;
 347   gint toggled;
 348
 349   g_return_if_fail (button != NULL);
 350   g_return_if_fail (GTK_IS_RADIO_BUTTON (button));
 351
 352   radio_button = GTK_RADIO_BUTTON (button);
 353   toggle_button = GTK_TOGGLE_BUTTON (button);
 354   toggled = FALSE;
 355
 356   gtk_widget_ref (GTK_WIDGET (button));
 357
 358   if (toggle_button->active)
 359     {
 360       tmp_button = NULL;
 361       tmp_list = radio_button->group;
 362
 363       while (tmp_list)
 364         {
 365           tmp_button = tmp_list->data;
 366           tmp_list = tmp_list->next;
 367
 368           if (tmp_button->active && tmp_button != toggle_button)
 369             break;
 370
 371           tmp_button = NULL;
 372         }
 373
 374       if (!tmp_button)
 375         {
 376           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 377         }
 378       else
 379         {
 380           toggled = TRUE;
 381           toggle_button->active = !toggle_button->active;
 382           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 383         }
 384     }
 385   else
 386     {
 387       toggled = TRUE;
 388       toggle_button->active = !toggle_button->active;
 389
 390       tmp_list = radio_button->group;
 391       while (tmp_list)
 392         {
 393           tmp_button = tmp_list->data;
 394           tmp_list = tmp_list->next;
 395
 396           if (tmp_button->active && (tmp_button != toggle_button))
 397             {
 398               gtk_button_clicked (GTK_BUTTON (tmp_button));
 399               break;
 400             }
 401         }
 402
 403       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 404     }
 405
 406   if (GTK_WIDGET_STATE (button) != new_state)
 407     gtk_widget_set_state (GTK_WIDGET (button), new_state);
 408
 409   if (toggled)
 410     gtk_toggle_button_toggled (toggle_button);
 411
 412   gtk_widget_queue_draw (GTK_WIDGET (button));
 413
 414   gtk_widget_unref (GTK_WIDGET (button));
 415 }
 416
 417 static void
 418 gtk_radio_button_draw_indicator (GtkCheckButton *check_button,
 419                                  GdkRectangle   *area)
 420 {
 421   GtkWidget *widget;
 422   GtkButton *button;
 423   GtkToggleButton *toggle_button;
 424   GtkStateType state_type;
 425   GtkShadowType shadow_type;
 426   GdkRectangle restrict_area;
 427   GdkRectangle new_area;
 428   gint x, y;
 429   gint indicator_size, indicator_spacing;
 430
 431   g_return_if_fail (check_button != NULL);
 432   g_return_if_fail (GTK_IS_RADIO_BUTTON (check_button));
 433
 434   if (GTK_WIDGET_VISIBLE (check_button) && GTK_WIDGET_MAPPED (check_button))
 435     {
 436       widget = GTK_WIDGET (check_button);
 437       button = GTK_BUTTON (check_button);
 438       toggle_button = GTK_TOGGLE_BUTTON (check_button);
 439
 440       state_type = GTK_WIDGET_STATE (widget);
 441       if ((state_type != GTK_STATE_NORMAL) &&
 442           (state_type != GTK_STATE_PRELIGHT))
 443         state_type = GTK_STATE_NORMAL;
 444
 445       _gtk_check_button_get_props (check_button, &indicator_size, &indicator_spacing);
 446
 447       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 448       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 449       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 450       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 451
 452       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 453         {
 454            if (state_type != GTK_STATE_NORMAL)
 455              gtk_paint_flat_box(widget->style, widget->window, state_type,
 456                                 GTK_SHADOW_ETCHED_OUT,
 457                                 area, widget, "radiobutton",
 458                                 new_area.x, new_area.y,
 459                                 new_area.width, new_area.height);
 460         }
 461
 462       x = widget->allocation.x + indicator_spacing + GTK_CONTAINER (widget)->border_width;
 463       y = widget->allocation.y + (widget->allocation.height - indicator_size) / 2;
 464
 465       if (GTK_TOGGLE_BUTTON (widget)->active)
 466         shadow_type = GTK_SHADOW_IN;
 467       else
 468         shadow_type = GTK_SHADOW_OUT;
 469
 470       if (GTK_TOGGLE_BUTTON (widget)->inconsistent)
 471         shadow_type = GTK_SHADOW_ETCHED_IN;
 472
 473       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 474         x = widget->allocation.x + widget->allocation.width - (indicator_size + x - widget->allocation.x);
 475
 476       gtk_paint_option (widget->style, widget->window,
 477                         GTK_WIDGET_STATE (widget), shadow_type,
 478                         area, widget, "radiobutton",
 479                         x, y, indicator_size, indicator_size);
 480     }
 481 }