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 GtkWidget*
 233 gtk_radio_button_new_from_widget (GtkRadioButton *group)
 234 {
 235   GSList *l = NULL;
 236   if (group)
 237     l = gtk_radio_button_group (group);
 238   return gtk_radio_button_new (l);
 239 }
 240
 241
 242 GtkWidget*
 243 gtk_radio_button_new_with_label_from_widget (GtkRadioButton *group,
 244                                              const gchar    *label)
 245 {
 246   GSList *l = NULL;
 247   if (group)
 248     l = gtk_radio_button_group (group);
 249   return gtk_radio_button_new_with_label (l, label);
 250 }
 251
 252 GSList*
 253 gtk_radio_button_group (GtkRadioButton *radio_button)
 254 {
 255   g_return_val_if_fail (radio_button != NULL, NULL);
 256   g_return_val_if_fail (GTK_IS_RADIO_BUTTON (radio_button), NULL);
 257
 258   return radio_button->group;
 259 }
 260
 261
 262 static void
 263 gtk_radio_button_destroy (GtkObject *object)
 264 {
 265   GtkRadioButton *radio_button;
 266   GtkRadioButton *tmp_button;
 267   GSList *tmp_list;
 268
 269   g_return_if_fail (object != NULL);
 270   g_return_if_fail (GTK_IS_RADIO_BUTTON (object));
 271
 272   radio_button = GTK_RADIO_BUTTON (object);
 273
 274   radio_button->group = g_slist_remove (radio_button->group, radio_button);
 275   tmp_list = radio_button->group;
 276
 277   while (tmp_list)
 278     {
 279       tmp_button = tmp_list->data;
 280       tmp_list = tmp_list->next;
 281
 282       tmp_button->group = radio_button->group;
 283     }
 284
 285   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 286     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 287 }
 288
 289 static void
 290 gtk_radio_button_clicked (GtkButton *button)
 291 {
 292   GtkToggleButton *toggle_button;
 293   GtkRadioButton *radio_button;
 294   GtkToggleButton *tmp_button;
 295   GtkStateType new_state;
 296   GSList *tmp_list;
 297   gint toggled;
 298
 299   g_return_if_fail (button != NULL);
 300   g_return_if_fail (GTK_IS_RADIO_BUTTON (button));
 301
 302   radio_button = GTK_RADIO_BUTTON (button);
 303   toggle_button = GTK_TOGGLE_BUTTON (button);
 304   toggled = FALSE;
 305
 306   gtk_widget_ref (GTK_WIDGET (button));
 307
 308   if (toggle_button->active)
 309     {
 310       tmp_button = NULL;
 311       tmp_list = radio_button->group;
 312
 313       while (tmp_list)
 314         {
 315           tmp_button = tmp_list->data;
 316           tmp_list = tmp_list->next;
 317
 318           if (tmp_button->active && tmp_button != toggle_button)
 319             break;
 320
 321           tmp_button = NULL;
 322         }
 323
 324       if (!tmp_button)
 325         {
 326           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 327         }
 328       else
 329         {
 330           toggled = TRUE;
 331           toggle_button->active = !toggle_button->active;
 332           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 333         }
 334     }
 335   else
 336     {
 337       toggled = TRUE;
 338       toggle_button->active = !toggle_button->active;
 339
 340       tmp_list = radio_button->group;
 341       while (tmp_list)
 342         {
 343           tmp_button = tmp_list->data;
 344           tmp_list = tmp_list->next;
 345
 346           if (tmp_button->active && (tmp_button != toggle_button))
 347             {
 348               gtk_button_clicked (GTK_BUTTON (tmp_button));
 349               break;
 350             }
 351         }
 352
 353       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 354     }
 355
 356   if (GTK_WIDGET_STATE (button) != new_state)
 357     gtk_widget_set_state (GTK_WIDGET (button), new_state);
 358
 359   if (toggled)
 360     gtk_toggle_button_toggled (toggle_button);
 361
 362   gtk_widget_queue_draw (GTK_WIDGET (button));
 363
 364   gtk_widget_unref (GTK_WIDGET (button));
 365 }
 366
 367 static void
 368 gtk_radio_button_draw_indicator (GtkCheckButton *check_button,
 369                                  GdkRectangle   *area)
 370 {
 371   GtkWidget *widget;
 372   GtkButton *button;
 373   GtkToggleButton *toggle_button;
 374   GtkStateType state_type;
 375   GtkShadowType shadow_type;
 376   GdkRectangle restrict_area;
 377   GdkRectangle new_area;
 378   gint width, height;
 379   gint x, y;
 380
 381   g_return_if_fail (check_button != NULL);
 382   g_return_if_fail (GTK_IS_RADIO_BUTTON (check_button));
 383
 384   if (GTK_WIDGET_VISIBLE (check_button) && GTK_WIDGET_MAPPED (check_button))
 385     {
 386       widget = GTK_WIDGET (check_button);
 387       button = GTK_BUTTON (check_button);
 388       toggle_button = GTK_TOGGLE_BUTTON (check_button);
 389
 390       state_type = GTK_WIDGET_STATE (widget);
 391       if ((state_type != GTK_STATE_NORMAL) &&
 392           (state_type != GTK_STATE_PRELIGHT))
 393         state_type = GTK_STATE_NORMAL;
 394
 395       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 396       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 397       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 398       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 399
 400       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 401         {
 402            if (state_type != GTK_STATE_NORMAL)
 403              gtk_paint_flat_box(widget->style, widget->window, state_type,
 404                                 GTK_SHADOW_ETCHED_OUT,
 405                                 area, widget, "radiobutton",
 406                                 new_area.x, new_area.y,
 407                                 new_area.width, new_area.height);
 408         }
 409
 410       x = widget->allocation.x + GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_spacing + GTK_CONTAINER (widget)->border_width;
 411       y = widget->allocation.y + (widget->allocation.height - GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size) / 2;
 412       width = GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size;
 413       height = GTK_CHECK_BUTTON_GET_CLASS (widget)->indicator_size;
 414
 415       if (GTK_TOGGLE_BUTTON (widget)->active)
 416         shadow_type = GTK_SHADOW_IN;
 417       else
 418         shadow_type = GTK_SHADOW_OUT;
 419
 420       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 421         x = widget->allocation.x + widget->allocation.width - (width + x - widget->allocation.x);
 422
 423       gtk_paint_option (widget->style, widget->window,
 424                         GTK_WIDGET_STATE (widget), shadow_type,
 425                         area, widget, "radiobutton",
 426                         x, y, width, height);
 427     }
 428 }