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