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         /* reversed_1 */ NULL,
  64         /* reversed_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   radio_button->group = g_slist_prepend (NULL, radio_button);
 102 }
 103
 104 static void
 105 gtk_radio_button_set_arg (GtkObject      *object,
 106                           GtkArg         *arg,
 107                           guint           arg_id)
 108 {
 109   GtkRadioButton *radio_button;
 110
 111   radio_button = GTK_RADIO_BUTTON (object);
 112
 113   switch (arg_id)
 114     {
 115       GSList *slist;
 116
 117     case ARG_GROUP:
 118       if (GTK_VALUE_OBJECT (*arg))
 119         slist = gtk_radio_button_group ((GtkRadioButton*) GTK_VALUE_OBJECT (*arg));
 120       else
 121         slist = NULL;
 122       gtk_radio_button_set_group (radio_button, slist);
 123       break;
 124     default:
 125       break;
 126     }
 127 }
 128
 129 static void
 130 gtk_radio_button_get_arg (GtkObject      *object,
 131                           GtkArg         *arg,
 132                           guint           arg_id)
 133 {
 134   GtkRadioButton *radio_button;
 135
 136   radio_button = GTK_RADIO_BUTTON (object);
 137
 138   switch (arg_id)
 139     {
 140     default:
 141       arg->type = GTK_TYPE_INVALID;
 142       break;
 143     }
 144 }
 145
 146 void
 147 gtk_radio_button_set_group (GtkRadioButton *radio_button,
 148                             GSList *group)
 149 {
 150   g_return_if_fail (radio_button != NULL);
 151   g_return_if_fail (GTK_IS_RADIO_BUTTON (radio_button));
 152   g_return_if_fail (!g_slist_find (group, radio_button));
 153
 154   if (radio_button->group)
 155     {
 156       GSList *slist;
 157
 158       radio_button->group = g_slist_remove (radio_button->group, radio_button);
 159
 160       for (slist = radio_button->group; slist; slist = slist->next)
 161         {
 162           GtkRadioButton *tmp_button;
 163
 164           tmp_button = slist->data;
 165
 166           tmp_button->group = radio_button->group;
 167         }
 168     }
 169
 170   radio_button->group = g_slist_prepend (group, radio_button);
 171
 172   if (group)
 173     {
 174       GSList *slist;
 175
 176       for (slist = group; slist; slist = slist->next)
 177         {
 178           GtkRadioButton *tmp_button;
 179
 180           tmp_button = slist->data;
 181
 182           tmp_button->group = radio_button->group;
 183         }
 184     }
 185   else
 186     {
 187       GTK_TOGGLE_BUTTON (radio_button)->active = TRUE;
 188       gtk_widget_set_state (GTK_WIDGET (radio_button), GTK_STATE_ACTIVE);
 189     }
 190 }
 191
 192 GtkWidget*
 193 gtk_radio_button_new (GSList *group)
 194 {
 195   GtkRadioButton *radio_button;
 196
 197   radio_button = gtk_type_new (gtk_radio_button_get_type ());
 198
 199   gtk_radio_button_set_group (radio_button, group);
 200
 201   return GTK_WIDGET (radio_button);
 202 }
 203
 204 GtkWidget*
 205 gtk_radio_button_new_with_label (GSList      *group,
 206                                  const gchar *label)
 207 {
 208   GtkWidget *radio_button;
 209   GtkWidget *label_widget;
 210
 211   radio_button = gtk_radio_button_new (group);
 212   label_widget = gtk_label_new (label);
 213   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 214
 215   gtk_container_add (GTK_CONTAINER (radio_button), label_widget);
 216   gtk_widget_show (label_widget);
 217
 218   return radio_button;
 219 }
 220
 221 GtkWidget*
 222 gtk_radio_button_new_from_widget (GtkRadioButton *group)
 223 {
 224   GSList *l = NULL;
 225   if (group)
 226     l = gtk_radio_button_group (group);
 227   return gtk_radio_button_new (l);
 228 }
 229
 230
 231 GtkWidget*
 232 gtk_radio_button_new_with_label_from_widget (GtkRadioButton *group,
 233                                              const gchar    *label)
 234 {
 235   GSList *l = NULL;
 236   if (group)
 237     l = gtk_radio_button_group (group);
 238   return gtk_radio_button_new_with_label (l, label);
 239 }
 240
 241 GSList*
 242 gtk_radio_button_group (GtkRadioButton *radio_button)
 243 {
 244   g_return_val_if_fail (radio_button != NULL, NULL);
 245   g_return_val_if_fail (GTK_IS_RADIO_BUTTON (radio_button), NULL);
 246
 247   return radio_button->group;
 248 }
 249
 250
 251 static void
 252 gtk_radio_button_destroy (GtkObject *object)
 253 {
 254   GtkRadioButton *radio_button;
 255   GtkRadioButton *tmp_button;
 256   GSList *tmp_list;
 257
 258   g_return_if_fail (object != NULL);
 259   g_return_if_fail (GTK_IS_RADIO_BUTTON (object));
 260
 261   radio_button = GTK_RADIO_BUTTON (object);
 262
 263   radio_button->group = g_slist_remove (radio_button->group, radio_button);
 264   tmp_list = radio_button->group;
 265
 266   while (tmp_list)
 267     {
 268       tmp_button = tmp_list->data;
 269       tmp_list = tmp_list->next;
 270
 271       tmp_button->group = radio_button->group;
 272     }
 273
 274   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 275     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 276 }
 277
 278 static void
 279 gtk_radio_button_clicked (GtkButton *button)
 280 {
 281   GtkToggleButton *toggle_button;
 282   GtkRadioButton *radio_button;
 283   GtkToggleButton *tmp_button;
 284   GtkStateType new_state;
 285   GSList *tmp_list;
 286   gint toggled;
 287
 288   g_return_if_fail (button != NULL);
 289   g_return_if_fail (GTK_IS_RADIO_BUTTON (button));
 290
 291   radio_button = GTK_RADIO_BUTTON (button);
 292   toggle_button = GTK_TOGGLE_BUTTON (button);
 293   toggled = FALSE;
 294
 295   if (toggle_button->active)
 296     {
 297       tmp_button = NULL;
 298       tmp_list = radio_button->group;
 299
 300       while (tmp_list)
 301         {
 302           tmp_button = tmp_list->data;
 303           tmp_list = tmp_list->next;
 304
 305           if (tmp_button->active && (tmp_button != toggle_button))
 306             break;
 307
 308           tmp_button = NULL;
 309         }
 310
 311       if (!tmp_button)
 312         {
 313           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 314         }
 315       else
 316         {
 317           toggled = TRUE;
 318           toggle_button->active = !toggle_button->active;
 319           new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 320         }
 321     }
 322   else
 323     {
 324       toggled = TRUE;
 325       toggle_button->active = !toggle_button->active;
 326
 327       tmp_list = radio_button->group;
 328       while (tmp_list)
 329         {
 330           tmp_button = tmp_list->data;
 331           tmp_list = tmp_list->next;
 332
 333           if (tmp_button->active && (tmp_button != toggle_button))
 334             {
 335               gtk_button_clicked (GTK_BUTTON (tmp_button));
 336               break;
 337             }
 338         }
 339
 340       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
 341     }
 342
 343   if (GTK_WIDGET_STATE (button) != new_state)
 344     gtk_widget_set_state (GTK_WIDGET (button), new_state);
 345   if (toggled)
 346     gtk_toggle_button_toggled (toggle_button);
 347   gtk_widget_queue_draw (GTK_WIDGET (button));
 348 }
 349
 350 static void
 351 gtk_radio_button_draw_indicator (GtkCheckButton *check_button,
 352                                  GdkRectangle   *area)
 353 {
 354   GtkWidget *widget;
 355   GtkButton *button;
 356   GtkToggleButton *toggle_button;
 357   GtkStateType state_type;
 358   GtkShadowType shadow_type;
 359   GdkRectangle restrict_area;
 360   GdkRectangle new_area;
 361   GdkPoint pts[4];
 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 = GTK_CONTAINER (widget)->border_width;
 380       restrict_area.y = restrict_area.x;
 381       restrict_area.width = widget->allocation.width - restrict_area.x * 2;
 382       restrict_area.height = widget->allocation.height - restrict_area.x * 2;
 383
 384       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 385         {
 386           gtk_style_set_background (widget->style, widget->window, state_type);
 387           gdk_window_clear_area (widget->window, new_area.x, new_area.y,
 388                                  new_area.width, new_area.height);
 389         }
 390
 391       x = CHECK_BUTTON_CLASS (widget)->indicator_spacing + GTK_CONTAINER (widget)->border_width;
 392       y = (widget->allocation.height - CHECK_BUTTON_CLASS (widget)->indicator_size) / 2;
 393       width = CHECK_BUTTON_CLASS (widget)->indicator_size;
 394       height = CHECK_BUTTON_CLASS (widget)->indicator_size;
 395
 396       if (GTK_TOGGLE_BUTTON (widget)->active)
 397         shadow_type = GTK_SHADOW_IN;
 398       else
 399         shadow_type = GTK_SHADOW_OUT;
 400
 401       pts[0].x = x + width / 2;
 402       pts[0].y = y;
 403       pts[1].x = x + width;
 404       pts[1].y = y + height / 2;
 405       pts[2].x = pts[0].x;
 406       pts[2].y = y + height;
 407       pts[3].x = x;
 408       pts[3].y = pts[1].y;
 409
 410       gdk_draw_polygon (widget->window,
 411                         widget->style->bg_gc[GTK_WIDGET_STATE (widget)],
 412                         TRUE, pts, 4);
 413       gtk_draw_diamond (widget->style, widget->window,
 414                         GTK_WIDGET_STATE (widget), shadow_type,
 415                         x, y, width, height);
 416     }
 417 }
 418