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_get_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 (GTK_IS_RADIO_BUTTON (radio_button));
 164   g_return_if_fail (!g_slist_find (group, radio_button));
 165
 166   if (radio_button->group)
 167     {
 168       GSList *slist;
 169
 170       radio_button->group = g_slist_remove (radio_button->group, radio_button);
 171
 172       for (slist = radio_button->group; slist; slist = slist->next)
 173         {
 174           GtkRadioButton *tmp_button;
 175
 176           tmp_button = slist->data;
 177
 178           tmp_button->group = radio_button->group;
 179         }
 180     }
 181
 182   radio_button->group = g_slist_prepend (group, radio_button);
 183
 184   if (group)
 185     {
 186       GSList *slist;
 187
 188       for (slist = group; slist; slist = slist->next)
 189         {
 190           GtkRadioButton *tmp_button;
 191
 192           tmp_button = slist->data;
 193
 194           tmp_button->group = radio_button->group;
 195         }
 196     }
 197
 198   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (radio_button), group == NULL);
 199 }
 200
 201 GtkWidget*
 202 gtk_radio_button_new (GSList *group)
 203 {
 204   GtkRadioButton *radio_button;
 205
 206   radio_button = gtk_type_new (gtk_radio_button_get_type ());
 207
 208   if (group)
 209     gtk_radio_button_set_group (radio_button, group);
 210
 211   return GTK_WIDGET (radio_button);
 212 }
 213
 214 GtkWidget*
 215 gtk_radio_button_new_with_label (GSList      *group,
 216                                  const gchar *label)
 217 {
 218   GtkWidget *radio_button;
 219   GtkWidget *label_widget;
 220
 221   radio_button = gtk_radio_button_new (group);
 222   label_widget = gtk_label_new (label);
 223   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 224
 225   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 226   gtk_widget_show (label_widget);
 227
 228   return radio_button;
 229 }
 230
 231
 232 /**
 233  * gtk_radio_button_new_with_mnemonic:
 234  * @group: the radio button group
 235  * @label: the text of the button, with an underscore in front of the
 236  *         mnemonic character
 237  * @returns: a new #GtkRadioButton
 238  *
 239  * Creates a new #GtkRadioButton containing a label. The label
 240  * will be created using gtk_label_new_with_mnemonic(), so underscores
 241  * in @label indicate the mnemonic for the button.
 242  **/
 243 GtkWidget*
 244 gtk_radio_button_new_with_mnemonic (GSList      *group,
 245                                     const gchar *label)
 246 {
 247   GtkWidget *radio_button;
 248   GtkWidget *label_widget;
 249
 250   radio_button = gtk_radio_button_new (group);
 251   label_widget = gtk_label_new_with_mnemonic (label);
 252   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 253
 254   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 255   gtk_widget_show (label_widget);
 256
 257   return radio_button;
 258 }
 259
 260 GtkWidget*
 261 gtk_radio_button_new_from_widget (GtkRadioButton *group)
 262 {
 263   GSList *l = NULL;
 264   if (group)
 265     l = gtk_radio_button_get_group (group);
 266   return gtk_radio_button_new (l);
 267 }
 268
 269
 270 GtkWidget*
 271 gtk_radio_button_new_with_label_from_widget (GtkRadioButton *group,
 272                                              const gchar    *label)
 273 {
 274   GSList *l = NULL;
 275   if (group)
 276     l = gtk_radio_button_get_group (group);
 277   return gtk_radio_button_new_with_label (l, label);
 278 }
 279
 280 /**
 281  * gtk_radio_button_new_with_mnemonic_from_widget:
 282  * @group: widget to get radio group from
 283  * @label: the text of the button, with an underscore in front of the
 284  *         mnemonic character
 285  * @returns: a new #GtkRadioButton
 286  *
 287  * Creates a new #GtkRadioButton containing a label. The label
 288  * will be created using gtk_label_new_with_mnemonic(), so underscores
 289  * in @label indicate the mnemonic for the button.
 290  **/
 291 GtkWidget*
 292 gtk_radio_button_new_with_mnemonic_from_widget (GtkRadioButton *group,
 293                                                 const gchar    *label)
 294 {
 295   GSList *l = NULL;
 296   if (group)
 297     l = gtk_radio_button_get_group (group);
 298   return gtk_radio_button_new_with_mnemonic (l, label);
 299 }
 300
 301 GSList*
 302 gtk_radio_button_get_group (GtkRadioButton *radio_button)
 303 {
 304   g_return_val_if_fail (GTK_IS_RADIO_BUTTON (radio_button), NULL);
 305
 306   return radio_button->group;
 307 }
 308
 309
 310 static void
 311 gtk_radio_button_destroy (GtkObject *object)
 312 {
 313   GtkRadioButton *radio_button;
 314   GtkRadioButton *tmp_button;
 315   GSList *tmp_list;
 316
 317   g_return_if_fail (GTK_IS_RADIO_BUTTON (object));
 318
 319   radio_button = GTK_RADIO_BUTTON (object);
 320
 321   radio_button->group = g_slist_remove (radio_button->group, radio_button);
 322   tmp_list = radio_button->group;
 323
 324   while (tmp_list)
 325     {
 326       tmp_button = tmp_list->data;
 327       tmp_list = tmp_list->next;
 328
 329       tmp_button->group = radio_button->group;
 330     }
 331
 332   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 333     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 334 }
 335
 336 static void
 337 gtk_radio_button_clicked (GtkButton *button)
 338 {
 339   GtkToggleButton *toggle_button;
 340   GtkRadioButton *radio_button;
 341   GtkToggleButton *tmp_button;
 342   GtkStateType new_state;
 343   GSList *tmp_list;
 344   gint toggled;
 345
 346   g_return_if_fail (GTK_IS_RADIO_BUTTON (button));
 347
 348   radio_button = GTK_RADIO_BUTTON (button);
 349   toggle_button = GTK_TOGGLE_BUTTON (button);
 350   toggled = FALSE;
 351
 352   gtk_widget_ref (GTK_WIDGET (button));
 353
 354   if (toggle_button->active)
 355     {
 356       tmp_button = NULL;
 357       tmp_list = radio_button->group;
 358
 359       while (tmp_list)
 360         {
 361           tmp_button = tmp_list->data;
 362           tmp_list = tmp_list->next;
 363
 364           if (tmp_button->active && tmp_button != toggle_button)
 365             break;
 366
 367           tmp_button = NULL;
 368         }
 369
 370       if (!tmp_button)
 371         {
 372           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 373         }
 374       else
 375         {
 376           toggled = TRUE;
 377           toggle_button->active = !toggle_button->active;
 378           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 379         }
 380     }
 381   else
 382     {
 383       toggled = TRUE;
 384       toggle_button->active = !toggle_button->active;
 385
 386       tmp_list = radio_button->group;
 387       while (tmp_list)
 388         {
 389           tmp_button = tmp_list->data;
 390           tmp_list = tmp_list->next;
 391
 392           if (tmp_button->active && (tmp_button != toggle_button))
 393             {
 394               gtk_button_clicked (GTK_BUTTON (tmp_button));
 395               break;
 396             }
 397         }
 398
 399       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 400     }
 401
 402   if (GTK_WIDGET_STATE (button) != new_state)
 403     gtk_widget_set_state (GTK_WIDGET (button), new_state);
 404
 405   if (toggled)
 406     gtk_toggle_button_toggled (toggle_button);
 407
 408   gtk_widget_queue_draw (GTK_WIDGET (button));
 409
 410   gtk_widget_unref (GTK_WIDGET (button));
 411 }
 412
 413 static void
 414 gtk_radio_button_draw_indicator (GtkCheckButton *check_button,
 415                                  GdkRectangle   *area)
 416 {
 417   GtkWidget *widget;
 418   GtkButton *button;
 419   GtkToggleButton *toggle_button;
 420   GtkStateType state_type;
 421   GtkShadowType shadow_type;
 422   GdkRectangle restrict_area;
 423   GdkRectangle new_area;
 424   gint x, y;
 425   gint indicator_size, indicator_spacing;
 426
 427   g_return_if_fail (GTK_IS_RADIO_BUTTON (check_button));
 428
 429   if (GTK_WIDGET_VISIBLE (check_button) && GTK_WIDGET_MAPPED (check_button))
 430     {
 431       widget = GTK_WIDGET (check_button);
 432       button = GTK_BUTTON (check_button);
 433       toggle_button = GTK_TOGGLE_BUTTON (check_button);
 434
 435       state_type = GTK_WIDGET_STATE (widget);
 436       if ((state_type != GTK_STATE_NORMAL) &&
 437           (state_type != GTK_STATE_PRELIGHT))
 438         state_type = GTK_STATE_NORMAL;
 439
 440       _gtk_check_button_get_props (check_button, &indicator_size, &indicator_spacing);
 441
 442       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 443       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 444       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 445       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 446
 447       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 448         {
 449            if (state_type != GTK_STATE_NORMAL)
 450              gtk_paint_flat_box(widget->style, widget->window, state_type,
 451                                 GTK_SHADOW_ETCHED_OUT,
 452                                 area, widget, "radiobutton",
 453                                 new_area.x, new_area.y,
 454                                 new_area.width, new_area.height);
 455         }
 456
 457       x = widget->allocation.x + indicator_spacing + GTK_CONTAINER (widget)->border_width;
 458       y = widget->allocation.y + (widget->allocation.height - indicator_size) / 2;
 459
 460       if (GTK_TOGGLE_BUTTON (widget)->active)
 461         shadow_type = GTK_SHADOW_IN;
 462       else
 463         shadow_type = GTK_SHADOW_OUT;
 464
 465       if (GTK_TOGGLE_BUTTON (widget)->inconsistent)
 466         shadow_type = GTK_SHADOW_ETCHED_IN;
 467
 468       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 469         x = widget->allocation.x + widget->allocation.width - (indicator_size + x - widget->allocation.x);
 470
 471       gtk_paint_option (widget->style, widget->window,
 472                         GTK_WIDGET_STATE (widget), shadow_type,
 473                         area, widget, "radiobutton",
 474                         x, y, indicator_size, indicator_size);
 475     }
 476 }