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       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   radio_button->group = g_slist_prepend (NULL, radio_button);
 103 }
 104
 105 static void
 106 gtk_radio_button_set_arg (GtkObject      *object,
 107                           GtkArg         *arg,
 108                           guint           arg_id)
 109 {
 110   GtkRadioButton *radio_button;
 111
 112   radio_button = GTK_RADIO_BUTTON (object);
 113
 114   switch (arg_id)
 115     {
 116       GSList *slist;
 117
 118     case ARG_GROUP:
 119       if (GTK_VALUE_OBJECT (*arg))
 120         slist = gtk_radio_button_group ((GtkRadioButton*) GTK_VALUE_OBJECT (*arg));
 121       else
 122         slist = NULL;
 123       gtk_radio_button_set_group (radio_button, slist);
 124       break;
 125     default:
 126       break;
 127     }
 128 }
 129
 130 static void
 131 gtk_radio_button_get_arg (GtkObject      *object,
 132                           GtkArg         *arg,
 133                           guint           arg_id)
 134 {
 135   GtkRadioButton *radio_button;
 136
 137   radio_button = GTK_RADIO_BUTTON (object);
 138
 139   switch (arg_id)
 140     {
 141     default:
 142       arg->type = GTK_TYPE_INVALID;
 143       break;
 144     }
 145 }
 146
 147 void
 148 gtk_radio_button_set_group (GtkRadioButton *radio_button,
 149                             GSList *group)
 150 {
 151   g_return_if_fail (radio_button != NULL);
 152   g_return_if_fail (GTK_IS_RADIO_BUTTON (radio_button));
 153   g_return_if_fail (!g_slist_find (group, radio_button));
 154
 155   if (radio_button->group)
 156     {
 157       GSList *slist;
 158
 159       radio_button->group = g_slist_remove (radio_button->group, radio_button);
 160
 161       for (slist = radio_button->group; slist; slist = slist->next)
 162         {
 163           GtkRadioButton *tmp_button;
 164
 165           tmp_button = slist->data;
 166
 167           tmp_button->group = radio_button->group;
 168         }
 169     }
 170
 171   radio_button->group = g_slist_prepend (group, radio_button);
 172
 173   if (group)
 174     {
 175       GSList *slist;
 176
 177       for (slist = group; slist; slist = slist->next)
 178         {
 179           GtkRadioButton *tmp_button;
 180
 181           tmp_button = slist->data;
 182
 183           tmp_button->group = radio_button->group;
 184         }
 185     }
 186   else
 187     {
 188       GTK_TOGGLE_BUTTON (radio_button)->active = TRUE;
 189       gtk_widget_set_state (GTK_WIDGET (radio_button), GTK_STATE_ACTIVE);
 190     }
 191 }
 192
 193 GtkWidget*
 194 gtk_radio_button_new (GSList *group)
 195 {
 196   GtkRadioButton *radio_button;
 197
 198   radio_button = gtk_type_new (gtk_radio_button_get_type ());
 199
 200   gtk_radio_button_set_group (radio_button, group);
 201
 202   return GTK_WIDGET (radio_button);
 203 }
 204
 205 GtkWidget*
 206 gtk_radio_button_new_with_label (GSList      *group,
 207                                  const gchar *label)
 208 {
 209   GtkWidget *radio_button;
 210   GtkWidget *label_widget;
 211
 212   radio_button = gtk_radio_button_new (group);
 213   label_widget = gtk_label_new (label);
 214   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 215
 216   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 217   gtk_widget_show (label_widget);
 218
 219   return radio_button;
 220 }
 221
 222 GtkWidget*
 223 gtk_radio_button_new_from_widget (GtkRadioButton *group)
 224 {
 225   GSList *l = NULL;
 226   if (group)
 227     l = gtk_radio_button_group (group);
 228   return gtk_radio_button_new (l);
 229 }
 230
 231
 232 GtkWidget*
 233 gtk_radio_button_new_with_label_from_widget (GtkRadioButton *group,
 234                                              const gchar    *label)
 235 {
 236   GSList *l = NULL;
 237   if (group)
 238     l = gtk_radio_button_group (group);
 239   return gtk_radio_button_new_with_label (l, label);
 240 }
 241
 242 GSList*
 243 gtk_radio_button_group (GtkRadioButton *radio_button)
 244 {
 245   g_return_val_if_fail (radio_button != NULL, NULL);
 246   g_return_val_if_fail (GTK_IS_RADIO_BUTTON (radio_button), NULL);
 247
 248   return radio_button->group;
 249 }
 250
 251
 252 static void
 253 gtk_radio_button_destroy (GtkObject *object)
 254 {
 255   GtkRadioButton *radio_button;
 256   GtkRadioButton *tmp_button;
 257   GSList *tmp_list;
 258
 259   g_return_if_fail (object != NULL);
 260   g_return_if_fail (GTK_IS_RADIO_BUTTON (object));
 261
 262   radio_button = GTK_RADIO_BUTTON (object);
 263
 264   radio_button->group = g_slist_remove (radio_button->group, radio_button);
 265   tmp_list = radio_button->group;
 266
 267   while (tmp_list)
 268     {
 269       tmp_button = tmp_list->data;
 270       tmp_list = tmp_list->next;
 271
 272       tmp_button->group = radio_button->group;
 273     }
 274
 275   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 276     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 277 }
 278
 279 static void
 280 gtk_radio_button_clicked (GtkButton *button)
 281 {
 282   GtkToggleButton *toggle_button;
 283   GtkRadioButton *radio_button;
 284   GtkToggleButton *tmp_button;
 285   GtkStateType new_state;
 286   GSList *tmp_list;
 287   gint toggled;
 288
 289   g_return_if_fail (button != NULL);
 290   g_return_if_fail (GTK_IS_RADIO_BUTTON (button));
 291
 292   radio_button = GTK_RADIO_BUTTON (button);
 293   toggle_button = GTK_TOGGLE_BUTTON (button);
 294   toggled = FALSE;
 295
 296   if (toggle_button->active)
 297     {
 298       tmp_button = NULL;
 299       tmp_list = radio_button->group;
 300
 301       while (tmp_list)
 302         {
 303           tmp_button = tmp_list->data;
 304           tmp_list = tmp_list->next;
 305
 306           if (tmp_button->active && (tmp_button != toggle_button))
 307             break;
 308
 309           tmp_button = NULL;
 310         }
 311
 312       if (!tmp_button)
 313         {
 314           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 315         }
 316       else
 317         {
 318           toggled = TRUE;
 319           toggle_button->active = !toggle_button->active;
 320           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 321         }
 322     }
 323   else
 324     {
 325       toggled = TRUE;
 326       toggle_button->active = !toggle_button->active;
 327
 328       tmp_list = radio_button->group;
 329       while (tmp_list)
 330         {
 331           tmp_button = tmp_list->data;
 332           tmp_list = tmp_list->next;
 333
 334           if (tmp_button->active && (tmp_button != toggle_button))
 335             {
 336               gtk_button_clicked (GTK_BUTTON (tmp_button));
 337               break;
 338             }
 339         }
 340
 341       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 342     }
 343
 344   if (GTK_WIDGET_STATE (button) != new_state)
 345     gtk_widget_set_state (GTK_WIDGET (button), new_state);
 346   if (toggled)
 347     gtk_toggle_button_toggled (toggle_button);
 348   gtk_widget_queue_draw (GTK_WIDGET (button));
 349 }
 350
 351 static void
 352 gtk_radio_button_draw_indicator (GtkCheckButton *check_button,
 353                                  GdkRectangle   *area)
 354 {
 355   GtkWidget *widget;
 356   GtkButton *button;
 357   GtkToggleButton *toggle_button;
 358   GtkStateType state_type;
 359   GtkShadowType shadow_type;
 360   GdkRectangle restrict_area;
 361   GdkRectangle new_area;
 362   gint width, height;
 363   gint x, y;
 364
 365   g_return_if_fail (check_button != NULL);
 366   g_return_if_fail (GTK_IS_RADIO_BUTTON (check_button));
 367
 368   if (GTK_WIDGET_VISIBLE (check_button) && GTK_WIDGET_MAPPED (check_button))
 369     {
 370       widget = GTK_WIDGET (check_button);
 371       button = GTK_BUTTON (check_button);
 372       toggle_button = GTK_TOGGLE_BUTTON (check_button);
 373
 374       state_type = GTK_WIDGET_STATE (widget);
 375       if ((state_type != GTK_STATE_NORMAL) &&
 376           (state_type != GTK_STATE_PRELIGHT))
 377         state_type = GTK_STATE_NORMAL;
 378
 379       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 380       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 381       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 382       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 383
 384       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 385         {
 386            if (state_type != GTK_STATE_NORMAL)
 387              gtk_paint_flat_box(widget->style, widget->window, state_type,
 388                                 GTK_SHADOW_ETCHED_OUT,
 389                                 area, widget, "radiobutton",
 390                                 new_area.x, new_area.y,
 391                                 new_area.width, new_area.height);
 392         }
 393
 394       x = widget->allocation.x + CHECK_BUTTON_CLASS (widget)->indicator_spacing + GTK_CONTAINER (widget)->border_width;
 395       y = widget->allocation.y + (widget->allocation.height - CHECK_BUTTON_CLASS (widget)->indicator_size) / 2;
 396       width = CHECK_BUTTON_CLASS (widget)->indicator_size;
 397       height = CHECK_BUTTON_CLASS (widget)->indicator_size;
 398
 399       if (GTK_TOGGLE_BUTTON (widget)->active)
 400         shadow_type = GTK_SHADOW_IN;
 401       else
 402         shadow_type = GTK_SHADOW_OUT;
 403
 404       gtk_paint_option (widget->style, widget->window,
 405                         GTK_WIDGET_STATE (widget), shadow_type,
 406                         area, widget, "radiobutton",
 407                         x, y, width, height);
 408     }
 409 }