Pileus Git - ~andy/gtk/blob - gtk/gtkcheckbutton.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 "gtkcheckbutton.h"
  28 #include "gtkintl.h"
  29 #include "gtklabel.h"
  30
  31
  32 #define INDICATOR_SIZE     13
  33 #define INDICATOR_SPACING  2
  34
  35
  36 static void gtk_check_button_class_init          (GtkCheckButtonClass *klass);
  37 static void gtk_check_button_init                (GtkCheckButton      *check_button);
  38 static void gtk_check_button_size_request        (GtkWidget           *widget,
  39                                                   GtkRequisition      *requisition);
  40 static void gtk_check_button_size_allocate       (GtkWidget           *widget,
  41                                                   GtkAllocation       *allocation);
  42 static gint gtk_check_button_expose              (GtkWidget           *widget,
  43                                                   GdkEventExpose      *event);
  44 static void gtk_check_button_paint               (GtkWidget           *widget,
  45                                                   GdkRectangle        *area);
  46 static void gtk_check_button_draw_indicator      (GtkCheckButton      *check_button,
  47                                                   GdkRectangle        *area);
  48 static void gtk_real_check_button_draw_indicator (GtkCheckButton      *check_button,
  49                                                   GdkRectangle        *area);
  50
  51 static GtkToggleButtonClass *parent_class = NULL;
  52
  53
  54 GtkType
  55 gtk_check_button_get_type (void)
  56 {
  57   static GtkType check_button_type = 0;
  58
  59   if (!check_button_type)
  60     {
  61       static const GtkTypeInfo check_button_info =
  62       {
  63         "GtkCheckButton",
  64         sizeof (GtkCheckButton),
  65         sizeof (GtkCheckButtonClass),
  66         (GtkClassInitFunc) gtk_check_button_class_init,
  67         (GtkObjectInitFunc) gtk_check_button_init,
  68         /* reserved_1 */ NULL,
  69         /* reserved_2 */ NULL,
  70         (GtkClassInitFunc) NULL,
  71       };
  72
  73       check_button_type = gtk_type_unique (GTK_TYPE_TOGGLE_BUTTON, &check_button_info);
  74     }
  75
  76   return check_button_type;
  77 }
  78
  79 static void
  80 gtk_check_button_class_init (GtkCheckButtonClass *class)
  81 {
  82   GtkWidgetClass *widget_class;
  83
  84   widget_class = (GtkWidgetClass*) class;
  85   parent_class = gtk_type_class (gtk_toggle_button_get_type ());
  86
  87   widget_class->size_request = gtk_check_button_size_request;
  88   widget_class->size_allocate = gtk_check_button_size_allocate;
  89   widget_class->expose_event = gtk_check_button_expose;
  90
  91   class->draw_indicator = gtk_real_check_button_draw_indicator;
  92
  93   gtk_widget_class_install_style_property (widget_class,
  94                                            g_param_spec_int ("indicator_size",
  95                                                              _("Indicator Size"),
  96                                                              _("Size of check or radio indicator"),
  97                                                              0,
  98                                                              G_MAXINT,
  99                                                              INDICATOR_SIZE,
 100                                                              G_PARAM_READABLE));
 101   gtk_widget_class_install_style_property (widget_class,
 102                                            g_param_spec_int ("indicator_spacing",
 103                                                              _("Indicator Spacing"),
 104                                                              _("Spacing around check or radio indicator"),
 105                                                              0,
 106                                                              G_MAXINT,
 107                                                              INDICATOR_SPACING,
 108                                                              G_PARAM_READABLE));
 109 }
 110
 111 static void
 112 gtk_check_button_init (GtkCheckButton *check_button)
 113 {
 114   GTK_WIDGET_SET_FLAGS (check_button, GTK_NO_WINDOW);
 115   GTK_WIDGET_UNSET_FLAGS (check_button, GTK_RECEIVES_DEFAULT);
 116   GTK_TOGGLE_BUTTON (check_button)->draw_indicator = TRUE;
 117 }
 118
 119 GtkWidget*
 120 gtk_check_button_new (void)
 121 {
 122   return gtk_widget_new (GTK_TYPE_CHECK_BUTTON, NULL);
 123 }
 124
 125
 126 GtkWidget*
 127 gtk_check_button_new_with_label (const gchar *label)
 128 {
 129   GtkWidget *check_button;
 130   GtkWidget *label_widget;
 131
 132   check_button = gtk_check_button_new ();
 133   label_widget = gtk_label_new (label);
 134   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 135
 136   gtk_container_add (GTK_CONTAINER (check_button), label_widget);
 137   gtk_widget_show (label_widget);
 138
 139   return check_button;
 140 }
 141
 142 /**
 143  * gtk_check_button_new_with_mnemonic:
 144  * @label: The text of the button, with an underscore in front of the
 145  *         mnemonic character
 146  * @returns: a new #GtkCheckButton
 147  *
 148  * Creates a new #GtkCheckButton containing a label.
 149  * If characters in @label are preceded by an underscore, they are underlined
 150  * indicating that they represent a keyboard accelerator called a mnemonic.
 151  * Pressing Alt and that key activates the checkbutton.
 152  **/
 153 GtkWidget*
 154 gtk_check_button_new_with_mnemonic (const gchar *label)
 155 {
 156   GtkWidget *check_button;
 157   GtkWidget *label_widget;
 158
 159   check_button = gtk_check_button_new ();
 160   label_widget = gtk_label_new_with_mnemonic (label);
 161   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 162   gtk_label_set_mnemonic_widget (GTK_LABEL (label_widget), check_button);
 163
 164   gtk_container_add (GTK_CONTAINER (check_button), label_widget);
 165   gtk_widget_show (label_widget);
 166
 167   return check_button;
 168 }
 169
 170
 171 /* This should only be called when toggle_button->draw_indicator
 172  * is true.
 173  */
 174 static void
 175 gtk_check_button_paint (GtkWidget    *widget,
 176                         GdkRectangle *area)
 177 {
 178   GtkCheckButton *check_button = GTK_CHECK_BUTTON (widget);
 179
 180   if (GTK_WIDGET_DRAWABLE (widget))
 181     {
 182       gint border_width;
 183       gint interior_focus;
 184
 185       gtk_widget_style_get (widget, "interior_focus", &interior_focus, NULL);
 186
 187       gtk_check_button_draw_indicator (check_button, area);
 188
 189       border_width = GTK_CONTAINER (widget)->border_width;
 190       if (GTK_WIDGET_HAS_FOCUS (widget))
 191         {
 192           if (interior_focus)
 193             {
 194               GtkWidget *child = GTK_BIN (widget)->child;
 195
 196               if (child && GTK_WIDGET_VISIBLE (child))
 197                 gtk_paint_focus (widget->style, widget->window,
 198                                  NULL, widget, "checkbutton",
 199                                  child->allocation.x - 1,
 200                                  child->allocation.y - 1,
 201                                  child->allocation.width + 1,
 202                                  child->allocation.height + 1);
 203             }
 204           else
 205             gtk_paint_focus (widget->style, widget->window,
 206                              NULL, widget, "checkbutton",
 207                              border_width + widget->allocation.x,
 208                              border_width + widget->allocation.y,
 209                              widget->allocation.width - 2 * border_width - 1,
 210                              widget->allocation.height - 2 * border_width - 1);
 211         }
 212     }
 213 }
 214
 215 void
 216 _gtk_check_button_get_props (GtkCheckButton *check_button,
 217                              gint           *indicator_size,
 218                              gint           *indicator_spacing)
 219 {
 220   GtkWidget *widget =  GTK_WIDGET (check_button);
 221
 222   if (indicator_size)
 223     gtk_widget_style_get (widget, "indicator_size", indicator_size, NULL);
 224
 225   if (indicator_spacing)
 226     gtk_widget_style_get (widget, "indicator_spacing", indicator_spacing, NULL);
 227 }
 228
 229 static void
 230 gtk_check_button_size_request (GtkWidget      *widget,
 231                                GtkRequisition *requisition)
 232 {
 233   GtkToggleButton *toggle_button;
 234
 235   g_return_if_fail (widget != NULL);
 236   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 237   g_return_if_fail (requisition != NULL);
 238
 239   toggle_button = GTK_TOGGLE_BUTTON (widget);
 240
 241   if (toggle_button->draw_indicator)
 242     {
 243       GtkWidget *child;
 244       gint temp;
 245       gint indicator_size;
 246       gint indicator_spacing;
 247       gint border_width = GTK_CONTAINER (widget)->border_width;
 248
 249       requisition->width = border_width * 2 + 2;
 250       requisition->height = border_width * 2 + 2;
 251
 252       child = GTK_BIN (widget)->child;
 253       if (child && GTK_WIDGET_VISIBLE (child))
 254         {
 255           GtkRequisition child_requisition;
 256
 257           gtk_widget_size_request (child, &child_requisition);
 258
 259           requisition->width += child_requisition.width;
 260           requisition->height += child_requisition.height;
 261         }
 262
 263       _gtk_check_button_get_props (GTK_CHECK_BUTTON (widget),
 264                                    &indicator_size, &indicator_spacing);
 265
 266       requisition->width += (indicator_size + indicator_spacing * 3 + 2);
 267
 268       temp = (indicator_size + indicator_spacing * 2);
 269       requisition->height = MAX (requisition->height, temp) + 2;
 270     }
 271   else
 272     (* GTK_WIDGET_CLASS (parent_class)->size_request) (widget, requisition);
 273 }
 274
 275 static void
 276 gtk_check_button_size_allocate (GtkWidget     *widget,
 277                                 GtkAllocation *allocation)
 278 {
 279   GtkCheckButton *check_button;
 280   GtkToggleButton *toggle_button;
 281   GtkButton *button;
 282   GtkAllocation child_allocation;
 283
 284   g_return_if_fail (widget != NULL);
 285   g_return_if_fail (GTK_IS_CHECK_BUTTON (widget));
 286   g_return_if_fail (allocation != NULL);
 287
 288   check_button = GTK_CHECK_BUTTON (widget);
 289   toggle_button = GTK_TOGGLE_BUTTON (widget);
 290
 291   if (toggle_button->draw_indicator)
 292     {
 293       gint indicator_size;
 294       gint indicator_spacing;
 295
 296       _gtk_check_button_get_props (check_button, &indicator_size, &indicator_spacing);
 297
 298       widget->allocation = *allocation;
 299       if (GTK_WIDGET_REALIZED (widget))
 300         gdk_window_move_resize (toggle_button->event_window,
 301                                 allocation->x, allocation->y,
 302                                 allocation->width, allocation->height);
 303
 304       button = GTK_BUTTON (widget);
 305
 306       if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 307         {
 308           gint border_width = GTK_CONTAINER (widget)->border_width;
 309
 310           child_allocation.x = (border_width + indicator_size + indicator_spacing * 3 + 1 +
 311                                 widget->allocation.x);
 312           child_allocation.y = border_width + 1 + widget->allocation.y;
 313           child_allocation.width = MAX (1, allocation->width -
 314                                         (border_width + indicator_size + indicator_spacing * 3 + 1) -
 315                                         border_width - 1);
 316           child_allocation.height = MAX (1, allocation->height - (border_width + 1) * 2);
 317
 318           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 319             child_allocation.x = allocation->x + allocation->width
 320               - (child_allocation.x - allocation->x + child_allocation.width);
 321
 322           gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
 323         }
 324     }
 325   else
 326     (* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
 327 }
 328
 329 static gint
 330 gtk_check_button_expose (GtkWidget      *widget,
 331                          GdkEventExpose *event)
 332 {
 333   GtkCheckButton *check_button;
 334   GtkToggleButton *toggle_button;
 335   GtkBin *bin;
 336
 337   g_return_val_if_fail (widget != NULL, FALSE);
 338   g_return_val_if_fail (GTK_IS_CHECK_BUTTON (widget), FALSE);
 339   g_return_val_if_fail (event != NULL, FALSE);
 340
 341   check_button = GTK_CHECK_BUTTON (widget);
 342   toggle_button = GTK_TOGGLE_BUTTON (widget);
 343   bin = GTK_BIN (widget);
 344
 345   if (GTK_WIDGET_DRAWABLE (widget))
 346     {
 347       if (toggle_button->draw_indicator)
 348         {
 349           gtk_check_button_paint (widget, &event->area);
 350
 351           if (bin->child)
 352             gtk_container_propagate_expose (GTK_CONTAINER (widget),
 353                                             bin->child,
 354                                             event);
 355         }
 356       else if (GTK_WIDGET_CLASS (parent_class)->expose_event)
 357         (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 358     }
 359
 360   return FALSE;
 361 }
 362
 363
 364 static void
 365 gtk_check_button_draw_indicator (GtkCheckButton *check_button,
 366                                  GdkRectangle   *area)
 367 {
 368   GtkCheckButtonClass *class;
 369
 370   g_return_if_fail (check_button != NULL);
 371   g_return_if_fail (GTK_IS_CHECK_BUTTON (check_button));
 372
 373   class = GTK_CHECK_BUTTON_GET_CLASS (check_button);
 374
 375   if (class->draw_indicator)
 376     (* class->draw_indicator) (check_button, area);
 377 }
 378
 379 static void
 380 gtk_real_check_button_draw_indicator (GtkCheckButton *check_button,
 381                                       GdkRectangle   *area)
 382 {
 383   GtkWidget *widget;
 384   GtkToggleButton *toggle_button;
 385   GtkStateType state_type;
 386   GtkShadowType shadow_type;
 387   GdkRectangle restrict_area;
 388   GdkRectangle new_area;
 389   gint width, height;
 390   gint x, y;
 391   gint indicator_size;
 392   gint indicator_spacing;
 393   GdkWindow *window;
 394
 395   g_return_if_fail (check_button != NULL);
 396   g_return_if_fail (GTK_IS_CHECK_BUTTON (check_button));
 397
 398   widget = GTK_WIDGET (check_button);
 399   toggle_button = GTK_TOGGLE_BUTTON (check_button);
 400
 401   if (GTK_WIDGET_DRAWABLE (check_button))
 402     {
 403       window = widget->window;
 404
 405       _gtk_check_button_get_props (check_button, &indicator_size, &indicator_spacing);
 406
 407       state_type = GTK_WIDGET_STATE (widget);
 408       if (state_type != GTK_STATE_NORMAL &&
 409           state_type != GTK_STATE_PRELIGHT)
 410         state_type = GTK_STATE_NORMAL;
 411
 412       restrict_area.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
 413       restrict_area.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
 414       restrict_area.width = widget->allocation.width - ( 2 * GTK_CONTAINER (widget)->border_width);
 415       restrict_area.height = widget->allocation.height - ( 2 * GTK_CONTAINER (widget)->border_width);
 416
 417       if (gdk_rectangle_intersect (area, &restrict_area, &new_area))
 418         {
 419           if (state_type != GTK_STATE_NORMAL)
 420             gtk_paint_flat_box (widget->style, window, state_type,
 421                                 GTK_SHADOW_ETCHED_OUT,
 422                                 area, widget, "checkbutton",
 423                                 new_area.x, new_area.y,
 424                                 new_area.width, new_area.height);
 425         }
 426
 427       x = widget->allocation.x + indicator_spacing + GTK_CONTAINER (widget)->border_width;
 428       y = widget->allocation.y + (widget->allocation.height - indicator_size) / 2;
 429       width = indicator_size;
 430       height = indicator_size;
 431
 432       if (GTK_TOGGLE_BUTTON (widget)->inconsistent)
 433         {
 434           state_type = GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE ? GTK_STATE_NORMAL : GTK_WIDGET_STATE (widget);
 435           shadow_type = GTK_SHADOW_ETCHED_IN;
 436         }
 437       else if (GTK_TOGGLE_BUTTON (widget)->active)
 438         {
 439           state_type = GTK_STATE_ACTIVE;
 440           shadow_type = GTK_SHADOW_IN;
 441         }
 442       else
 443         {
 444           shadow_type = GTK_SHADOW_OUT;
 445           state_type = GTK_WIDGET_STATE (widget);
 446         }
 447
 448       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 449         x = widget->allocation.x + widget->allocation.width - (width + x - widget->allocation.x);
 450
 451       gtk_paint_check (widget->style, window,
 452                        state_type, shadow_type,
 453                        area, widget, "checkbutton",
 454                        x, y, width, height);
 455     }
 456 }