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 Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 #include "gtklabel.h"
  20 #include "gtkradiobutton.h"
  21 #include "gtksignal.h"
  22
  23
  24 enum {
  25   ARG_0,
  26   ARG_GROUP
  27 };
  28
  29 #define CHECK_BUTTON_CLASS(w)  GTK_CHECK_BUTTON_CLASS (GTK_OBJECT (w)->klass)
  30
  31
  32 static void gtk_radio_button_class_init     (GtkRadioButtonClass  *klass);
  33 static void gtk_radio_button_init           (GtkRadioButton       *radio_button);
  34 static void gtk_radio_button_destroy        (GtkObject            *object);
  35 static void gtk_radio_button_clicked        (GtkButton            *button);
  36 static void gtk_radio_button_draw_indicator (GtkCheckButton       *check_button,
  37                                              GdkRectangle         *area);
  38 static void gtk_radio_button_set_arg        (GtkObject            *object,
  39                                              GtkArg               *arg,
  40                                              guint                 arg_id);
  41 static void gtk_radio_button_get_arg        (GtkObject            *object,
  42                                              GtkArg               *arg,
  43                                              guint                 arg_id);
  44
  45
  46 static GtkCheckButtonClass *parent_class = NULL;
  47
  48
  49 GtkType
  50 gtk_radio_button_get_type (void)
  51 {
  52   static GtkType radio_button_type = 0;
  53
  54   if (!radio_button_type)
  55     {
  56       static const GtkTypeInfo radio_button_info =
  57       {
  58         "GtkRadioButton",
  59         sizeof (GtkRadioButton),
  60         sizeof (GtkRadioButtonClass),
  61         (GtkClassInitFunc) gtk_radio_button_class_init,
  62         (GtkObjectInitFunc) gtk_radio_button_init,
  63         /* reserved_1 */ NULL,
  64         /* reserved_2 */ NULL,
  65         (GtkClassInitFunc) NULL,
  66       };
  67
  68       radio_button_type = gtk_type_unique (gtk_check_button_get_type (), &radio_button_info);
  69     }
  70
  71   return radio_button_type;
  72 }
  73
  74 static void
  75 gtk_radio_button_class_init (GtkRadioButtonClass *class)
  76 {
  77   GtkObjectClass *object_class;
  78   GtkButtonClass *button_class;
  79   GtkCheckButtonClass *check_button_class;
  80
  81   object_class = (GtkObjectClass*) class;
  82   button_class = (GtkButtonClass*) class;
  83   check_button_class = (GtkCheckButtonClass*) class;
  84
  85   parent_class = gtk_type_class (gtk_check_button_get_type ());
  86
  87   gtk_object_add_arg_type ("GtkRadioButton::group", GTK_TYPE_RADIO_BUTTON, GTK_ARG_WRITABLE, ARG_GROUP);
  88
  89   object_class->set_arg = gtk_radio_button_set_arg;
  90   object_class->get_arg = gtk_radio_button_get_arg;
  91   object_class->destroy = gtk_radio_button_destroy;
  92
  93   button_class->clicked = gtk_radio_button_clicked;
  94
  95   check_button_class->draw_indicator = gtk_radio_button_draw_indicator;
  96 }
  97
  98 static void
  99 gtk_radio_button_init (GtkRadioButton *radio_button)
 100 {
 101   GTK_WIDGET_SET_FLAGS (radio_button, GTK_NO_WINDOW);
 102
 103   GTK_TOGGLE_BUTTON (radio_button)->active = TRUE;
 104
 105   radio_button->group = g_slist_prepend (NULL, radio_button);
 106
 107   gtk_widget_set_state (GTK_WIDGET (radio_button), GTK_STATE_ACTIVE);
 108 }
 109
 110 static void
 111 gtk_radio_button_set_arg (GtkObject      *object,
 112                           GtkArg         *arg,
 113                           guint           arg_id)
 114 {
 115   GtkRadioButton *radio_button;
 116
 117   radio_button = GTK_RADIO_BUTTON (object);
 118
 119   switch (arg_id)
 120     {
 121       GSList *slist;
 122
 123     case ARG_GROUP:
 124       if (GTK_VALUE_OBJECT (*arg))
 125         slist = gtk_radio_button_group ((GtkRadioButton*) GTK_VALUE_OBJECT (*arg));
 126       else
 127         slist = NULL;
 128       gtk_radio_button_set_group (radio_button, slist);
 129       break;
 130     default:
 131       break;
 132     }
 133 }
 134
 135 static void
 136 gtk_radio_button_get_arg (GtkObject      *object,
 137                           GtkArg         *arg,
 138                           guint           arg_id)
 139 {
 140   GtkRadioButton *radio_button;
 141
 142   radio_button = GTK_RADIO_BUTTON (object);
 143
 144   switch (arg_id)
 145     {
 146     default:
 147       arg->type = GTK_TYPE_INVALID;
 148       break;
 149     }
 150 }
 151
 152 void
 153 gtk_radio_button_set_group (GtkRadioButton *radio_button,
 154                             GSList         *group)
 155 {
 156   g_return_if_fail (radio_button != NULL);
 157   g_return_if_fail (GTK_IS_RADIO_BUTTON (radio_button));
 158   g_return_if_fail (!g_slist_find (group, radio_button));
 159
 160   if (radio_button->group)
 161     {
 162       GSList *slist;
 163
 164       radio_button->group = g_slist_remove (radio_button->group, radio_button);
 165
 166       for (slist = radio_button->group; slist; slist = slist->next)
 167         {
 168           GtkRadioButton *tmp_button;
 169
 170           tmp_button = slist->data;
 171
 172           tmp_button->group = radio_button->group;
 173         }
 174     }
 175
 176   radio_button->group = g_slist_prepend (group, radio_button);
 177
 178   if (group)
 179     {
 180       GSList *slist;
 181
 182       for (slist = group; slist; slist = slist->next)
 183         {
 184           GtkRadioButton *tmp_button;
 185
 186           tmp_button = slist->data;
 187
 188           tmp_button->group = radio_button->group;
 189         }
 190     }
 191
 192   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (radio_button), group == NULL);
 193 }
 194
 195 GtkWidget*
 196 gtk_radio_button_new (GSList *group)
 197 {
 198   GtkRadioButton *radio_button;
 199
 200   radio_button = gtk_type_new (gtk_radio_button_get_type ());
 201
 202   if (group)
 203     gtk_radio_button_set_group (radio_button, group);
 204
 205   return GTK_WIDGET (radio_button);
 206 }
 207
 208 GtkWidget*
 209 gtk_radio_button_new_with_label (GSList      *group,
 210                                  const gchar *label)
 211 {
 212   GtkWidget *radio_button;
 213   GtkWidget *label_widget;
 214
 215   radio_button = gtk_radio_button_new (group);
 216   label_widget = gtk_label_new (label);
 217   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 218
 219   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 220   gtk_widget_show (label_widget);
 221
 222   return radio_button;
 223 }
 224
 225 GtkWidget*
 226 gtk_radio_button_new_from_widget (GtkRadioButton *group)
 227 {
 228   GSList *l = NULL;
 229   if (group)
 230     l = gtk_radio_button_group (group);
 231   return gtk_radio_button_new (l);
 232 }
 233
 234
 235 GtkWidget*
 236 gtk_radio_button_new_with_label_from_widget (GtkRadioButton *group,
 237                                              const gchar    *label)
 238 {
 239   GSList *l = NULL;
 240   if (group)
 241     l = gtk_radio_button_group (group);
 242   return gtk_radio_button_new_with_label (l, label);
 243 }
 244
 245 GSList*
 246 gtk_radio_button_group (GtkRadioButton *radio_button)
 247 {
 248   g_return_val_if_fail (radio_button != NULL, NULL);
 249   g_return_val_if_fail (GTK_IS_RADIO_BUTTON (radio_button), NULL);
 250
 251   return radio_button->group;
 252 }
 253
 254
 255 static void
 256 gtk_radio_button_destroy (GtkObject *object)
 257 {
 258   GtkRadioButton *radio_button;
 259   GtkRadioButton *tmp_button;
 260   GSList *tmp_list;
 261
 262   g_return_if_fail (object != NULL);
 263   g_return_if_fail (GTK_IS_RADIO_BUTTON (object));
 264
 265   radio_button = GTK_RADIO_BUTTON (object);
 266
 267   radio_button->group = g_slist_remove (radio_button->group, radio_button);
 268   tmp_list = radio_button->group;
 269
 270   while (tmp_list)
 271     {
 272       tmp_button = tmp_list->data;
 273       tmp_list = tmp_list->next;
 274
 275       tmp_button->group = radio_button->group;
 276     }
 277
 278   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 279     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 280 }
 281
 282 static void
 283 gtk_radio_button_clicked (GtkButton *button)
 284 {
 285   GtkToggleButton *toggle_button;
 286   GtkRadioButton *radio_button;
 287   GtkToggleButton *tmp_button;
 288   GtkStateType new_state;
 289   GSList *tmp_list;
 290   gint toggled;
 291
 292   g_return_if_fail (button != NULL);
 293   g_return_if_fail (GTK_IS_RADIO_BUTTON (button));
 294
 295   radio_button = GTK_RADIO_BUTTON (button);
 296   toggle_button = GTK_TOGGLE_BUTTON (button);
 297   toggled = FALSE;
 298
 299   gtk_widget_ref (GTK_WIDGET (button));
 300
 301   if (toggle_button->active)
 302     {
 303       tmp_button = NULL;
 304       tmp_list = radio_button->group;
 305
 306       while (tmp_list)
 307         {
 308           tmp_button = tmp_list->data;
 309           tmp_list = tmp_list->next;
 310
 311           if (tmp_button->active && tmp_button != toggle_button)
 312             break;
 313
 314           tmp_button = NULL;
 315         }
 316
 317       if (!tmp_button)
 318         {
 319           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 320         }
 321       else
 322         {
 323           toggled = TRUE;
 324           toggle_button->active = !toggle_button->active;
 325           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 326         }
 327     }
 328   else
 329     {
 330       toggled = TRUE;
 331       toggle_button->active = !toggle_button->active;
 332
 333       tmp_list = radio_button->group;
 334       while (tmp_list)
 335         {
 336           tmp_button = tmp_list->data;
 337           tmp_list = tmp_list->next;
 338
 339           if (tmp_button->active && (tmp_button != toggle_button))
 340             {
 341               gtk_button_clicked (GTK_BUTTON (tmp_button));
 342               break;
 343             }
 344         }
 345
 346       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 347     }
 348
 349   if (GTK_WIDGET_STATE (button) != new_state)
 350     gtk_widget_set_state (GTK_WIDGET (button), new_state);
 351
 352   if (toggled)
 353     gtk_toggle_button_toggled (toggle_button);
 354
 355   gtk_widget_queue_draw (GTK_WIDGET (button));
 356
 357   gtk_widget_unref (GTK_WIDGET (button));
 358 }
 359
 360 static void
 361 gtk_radio_button_draw_indicator (GtkCheckButton *check_button,
 362                                  GdkRectangle   *area)
 363 {
 364   GtkWidget *widget;
 365   GtkButton *button;
 366   GtkToggleButton *toggle_button;
 367   GtkStateType state_type;
 368   GtkShadowType shadow_type;
 369   GdkRectangle restrict_area;
 370   GdkRectangle new_area;
 371   gint width, height;
 372   gint x, y;
 373
 374   g_return_if_fail (check_button != NULL);
 375   g_return_if_fail (GTK_IS_RADIO_BUTTON (check_button));
 376
 377   if (GTK_WIDGET_VISIBLE (check_button) && GTK_WIDGET_MAPPED (check_button))
 378     {
 379       widget = GTK_WIDGET (check_button);
 380       button = GTK_BUTTON (check_button);
 381       toggle_button = GTK_TOGGLE_BUTTON (check_button);
 382
 383       state_type = GTK_WIDGET_STATE (widget);
 384       if ((state_type != GTK_STATE_NORMAL) &&
 385           (state_type != GTK_STATE_PRELIGHT))
 386         state_type = GTK_STATE_NORMAL;
 387
 388       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 389       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 390       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 391       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 392
 393       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 394         {
 395            if (state_type != GTK_STATE_NORMAL)
 396              gtk_paint_flat_box(widget->style, widget->window, state_type,
 397                                 GTK_SHADOW_ETCHED_OUT,
 398                                 area, widget, "radiobutton",
 399                                 new_area.x, new_area.y,
 400                                 new_area.width, new_area.height);
 401         }
 402
 403       x = widget->allocation.x + CHECK_BUTTON_CLASS (widget)->indicator_spacing + GTK_CONTAINER (widget)->border_width;
 404       y = widget->allocation.y + (widget->allocation.height - CHECK_BUTTON_CLASS (widget)->indicator_size) / 2;
 405       width = CHECK_BUTTON_CLASS (widget)->indicator_size;
 406       height = CHECK_BUTTON_CLASS (widget)->indicator_size;
 407
 408       if (GTK_TOGGLE_BUTTON (widget)->active)
 409         shadow_type = GTK_SHADOW_IN;
 410       else
 411         shadow_type = GTK_SHADOW_OUT;
 412
 413       gtk_paint_option (widget->style, widget->window,
 414                         GTK_WIDGET_STATE (widget), shadow_type,
 415                         area, widget, "radiobutton",
 416                         x, y, width, height);
 417     }
 418 }