Pileus Git - ~andy/gtk/blob - gtk/gtkbutton.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 1997-2001.  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 <string.h>
  28 #include "gtkbutton.h"
  29 #include "gtklabel.h"
  30 #include "gtkmain.h"
  31 #include "gtksignal.h"
  32 #include "gtkimage.h"
  33 #include "gtkhbox.h"
  34 #include "gtkstock.h"
  35 #include "gtkiconfactory.h"
  36 #include "gtkintl.h"
  37
  38 #define CHILD_SPACING     1
  39 #define DEFAULT_LEFT_POS  4
  40 #define DEFAULT_TOP_POS   4
  41 #define DEFAULT_SPACING   7
  42
  43 /* Time out before giving up on getting a key release when animatng
  44  * the close button.
  45  */
  46 #define ACTIVATE_TIMEOUT 250
  47
  48 enum {
  49   PRESSED,
  50   RELEASED,
  51   CLICKED,
  52   ENTER,
  53   LEAVE,
  54   ACTIVATE,
  55   LAST_SIGNAL
  56 };
  57
  58 enum {
  59   PROP_0,
  60   PROP_LABEL,
  61   PROP_RELIEF
  62 };
  63
  64 static void gtk_button_class_init     (GtkButtonClass   *klass);
  65 static void gtk_button_init           (GtkButton        *button);
  66 static void gtk_button_set_property   (GObject         *object,
  67                                        guint            prop_id,
  68                                        const GValue    *value,
  69                                        GParamSpec      *pspec);
  70 static void gtk_button_get_property   (GObject         *object,
  71                                        guint            prop_id,
  72                                        GValue          *value,
  73                                        GParamSpec      *pspec);
  74 static void gtk_button_realize        (GtkWidget        *widget);
  75 static void gtk_button_unrealize      (GtkWidget        *widget);
  76 static void gtk_button_size_request   (GtkWidget        *widget,
  77                                        GtkRequisition   *requisition);
  78 static void gtk_button_size_allocate  (GtkWidget        *widget,
  79                                        GtkAllocation    *allocation);
  80 static void gtk_button_paint          (GtkWidget        *widget,
  81                                        GdkRectangle     *area);
  82 static gint gtk_button_expose         (GtkWidget        *widget,
  83                                        GdkEventExpose   *event);
  84 static gint gtk_button_button_press   (GtkWidget        *widget,
  85                                        GdkEventButton   *event);
  86 static gint gtk_button_button_release (GtkWidget        *widget,
  87                                        GdkEventButton   *event);
  88 static gint gtk_button_key_release    (GtkWidget        *widget,
  89                                        GdkEventKey      *event);
  90 static gint gtk_button_enter_notify   (GtkWidget        *widget,
  91                                        GdkEventCrossing *event);
  92 static gint gtk_button_leave_notify   (GtkWidget        *widget,
  93                                        GdkEventCrossing *event);
  94 static void gtk_button_add            (GtkContainer     *container,
  95                                        GtkWidget        *widget);
  96 static void gtk_button_remove         (GtkContainer     *container,
  97                                        GtkWidget        *widget);
  98 static void gtk_real_button_pressed   (GtkButton        *button);
  99 static void gtk_real_button_released  (GtkButton        *button);
 100 static void gtk_real_button_enter     (GtkButton        *button);
 101 static void gtk_real_button_leave     (GtkButton        *button);
 102 static void gtk_real_button_activate (GtkButton         *button);
 103 static GtkType gtk_button_child_type  (GtkContainer     *container);
 104
 105 static void gtk_button_finish_activate (GtkButton *button,
 106                                         gboolean   do_it);
 107
 108 static GtkBinClass *parent_class = NULL;
 109 static guint button_signals[LAST_SIGNAL] = { 0 };
 110
 111
 112 GtkType
 113 gtk_button_get_type (void)
 114 {
 115   static GtkType button_type = 0;
 116
 117   if (!button_type)
 118     {
 119       static const GTypeInfo button_info =
 120       {
 121         sizeof (GtkButtonClass),
 122         NULL,           /* base_init */
 123         NULL,           /* base_finalize */
 124         (GClassInitFunc) gtk_button_class_init,
 125         NULL,           /* class_finalize */
 126         NULL,           /* class_data */
 127         sizeof (GtkButton),
 128         16,             /* n_preallocs */
 129         (GInstanceInitFunc) gtk_button_init,
 130       };
 131
 132       button_type = g_type_register_static (GTK_TYPE_BIN, "GtkButton", &button_info, 0);
 133     }
 134
 135   return button_type;
 136 }
 137
 138 static void
 139 gtk_button_class_init (GtkButtonClass *klass)
 140 {
 141   GtkObjectClass *object_class;
 142   GtkWidgetClass *widget_class;
 143   GtkContainerClass *container_class;
 144
 145   object_class = (GtkObjectClass*) klass;
 146   widget_class = (GtkWidgetClass*) klass;
 147   container_class = (GtkContainerClass*) klass;
 148
 149   parent_class = g_type_class_peek_parent (klass);
 150
 151   G_OBJECT_CLASS(object_class)->set_property = gtk_button_set_property;
 152   G_OBJECT_CLASS(object_class)->get_property = gtk_button_get_property;
 153
 154   widget_class->realize = gtk_button_realize;
 155   widget_class->unrealize = gtk_button_unrealize;
 156   widget_class->size_request = gtk_button_size_request;
 157   widget_class->size_allocate = gtk_button_size_allocate;
 158   widget_class->expose_event = gtk_button_expose;
 159   widget_class->button_press_event = gtk_button_button_press;
 160   widget_class->button_release_event = gtk_button_button_release;
 161   widget_class->key_release_event = gtk_button_key_release;
 162   widget_class->enter_notify_event = gtk_button_enter_notify;
 163   widget_class->leave_notify_event = gtk_button_leave_notify;
 164
 165   container_class->add = gtk_button_add;
 166   container_class->remove = gtk_button_remove;
 167   container_class->child_type = gtk_button_child_type;
 168
 169   klass->pressed = gtk_real_button_pressed;
 170   klass->released = gtk_real_button_released;
 171   klass->clicked = NULL;
 172   klass->enter = gtk_real_button_enter;
 173   klass->leave = gtk_real_button_leave;
 174   klass->activate = gtk_real_button_activate;
 175
 176   g_object_class_install_property (G_OBJECT_CLASS(object_class),
 177                                    PROP_LABEL,
 178                                    g_param_spec_string ("label",
 179                                                         _("Label"),
 180                                                         _("Text of the label widget inside the button, if the button contains a label widget."),
 181                                                         NULL,
 182                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 183
 184   g_object_class_install_property (G_OBJECT_CLASS(object_class),
 185                                    PROP_RELIEF,
 186                                    g_param_spec_enum ("relief",
 187                                                       _("Border relief"),
 188                                                       _("The border relief style."),
 189                                                       GTK_TYPE_RELIEF_STYLE,
 190                                                       GTK_RELIEF_NORMAL,
 191                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 192
 193   button_signals[PRESSED] =
 194     gtk_signal_new ("pressed",
 195                     GTK_RUN_FIRST,
 196                     GTK_CLASS_TYPE (object_class),
 197                     GTK_SIGNAL_OFFSET (GtkButtonClass, pressed),
 198                     gtk_marshal_VOID__VOID,
 199                     GTK_TYPE_NONE, 0);
 200   button_signals[RELEASED] =
 201     gtk_signal_new ("released",
 202                     GTK_RUN_FIRST,
 203                     GTK_CLASS_TYPE (object_class),
 204                     GTK_SIGNAL_OFFSET (GtkButtonClass, released),
 205                     gtk_marshal_VOID__VOID,
 206                     GTK_TYPE_NONE, 0);
 207   button_signals[CLICKED] =
 208     gtk_signal_new ("clicked",
 209                     GTK_RUN_FIRST | GTK_RUN_ACTION,
 210                     GTK_CLASS_TYPE (object_class),
 211                     GTK_SIGNAL_OFFSET (GtkButtonClass, clicked),
 212                     gtk_marshal_VOID__VOID,
 213                     GTK_TYPE_NONE, 0);
 214   button_signals[ENTER] =
 215     gtk_signal_new ("enter",
 216                     GTK_RUN_FIRST,
 217                     GTK_CLASS_TYPE (object_class),
 218                     GTK_SIGNAL_OFFSET (GtkButtonClass, enter),
 219                     gtk_marshal_VOID__VOID,
 220                     GTK_TYPE_NONE, 0);
 221   button_signals[LEAVE] =
 222     gtk_signal_new ("leave",
 223                     GTK_RUN_FIRST,
 224                     GTK_CLASS_TYPE (object_class),
 225                     GTK_SIGNAL_OFFSET (GtkButtonClass, leave),
 226                     gtk_marshal_VOID__VOID,
 227                     GTK_TYPE_NONE, 0);
 228   button_signals[ACTIVATE] =
 229     gtk_signal_new ("activate",
 230                     GTK_RUN_FIRST,
 231                     GTK_CLASS_TYPE (object_class),
 232                     GTK_SIGNAL_OFFSET (GtkButtonClass, activate),
 233                     gtk_marshal_VOID__VOID,
 234                     GTK_TYPE_NONE, 0);
 235   widget_class->activate_signal = button_signals[ACTIVATE];
 236 }
 237
 238 static void
 239 gtk_button_init (GtkButton *button)
 240 {
 241   GTK_WIDGET_SET_FLAGS (button, GTK_CAN_FOCUS | GTK_RECEIVES_DEFAULT);
 242   GTK_WIDGET_UNSET_FLAGS (button, GTK_NO_WINDOW);
 243
 244   button->child = NULL;
 245   button->in_button = FALSE;
 246   button->button_down = FALSE;
 247   button->relief = GTK_RELIEF_NORMAL;
 248 }
 249
 250 static GtkType
 251 gtk_button_child_type  (GtkContainer     *container)
 252 {
 253   if (!GTK_BIN (container)->child)
 254     return GTK_TYPE_WIDGET;
 255   else
 256     return GTK_TYPE_NONE;
 257 }
 258
 259 static void
 260 gtk_button_set_property (GObject         *object,
 261                          guint            prop_id,
 262                          const GValue    *value,
 263                          GParamSpec      *pspec)
 264 {
 265   GtkButton *button;
 266
 267   button = GTK_BUTTON (object);
 268
 269   switch (prop_id)
 270     {
 271       GtkWidget *child;
 272
 273     case PROP_LABEL:
 274       child = GTK_BIN (button)->child;
 275       if (!child)
 276         child = gtk_widget_new (GTK_TYPE_LABEL,
 277                                 "visible", TRUE,
 278                                 "parent", button,
 279                                 NULL);
 280       if (GTK_IS_LABEL (child))
 281         {
 282           gtk_label_set_text (GTK_LABEL (child),
 283                               g_value_get_string (value) ? g_value_get_string (value) : "");
 284         }
 285       break;
 286     case PROP_RELIEF:
 287       gtk_button_set_relief (button, g_value_get_enum (value));
 288       break;
 289     default:
 290       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 291       break;
 292     }
 293 }
 294
 295 static void
 296 gtk_button_get_property (GObject         *object,
 297                          guint            prop_id,
 298                          GValue          *value,
 299                          GParamSpec      *pspec)
 300 {
 301   GtkButton *button;
 302
 303   button = GTK_BUTTON (object);
 304
 305   switch (prop_id)
 306     {
 307     case PROP_LABEL:
 308       if (GTK_BIN (button)->child && GTK_IS_LABEL (GTK_BIN (button)->child))
 309          g_value_set_string (value, GTK_LABEL (GTK_BIN (button)->child)->label);
 310       else
 311          g_value_set_string (value, NULL);
 312       break;
 313     case PROP_RELIEF:
 314       g_value_set_enum (value, gtk_button_get_relief (button));
 315       break;
 316     default:
 317       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 318       break;
 319     }
 320 }
 321
 322 GtkWidget*
 323 gtk_button_new (void)
 324 {
 325   return GTK_WIDGET (gtk_type_new (gtk_button_get_type ()));
 326 }
 327
 328 GtkWidget*
 329 gtk_button_new_with_label (const gchar *label)
 330 {
 331   GtkWidget *button;
 332   GtkWidget *label_widget;
 333
 334   button = gtk_button_new ();
 335   label_widget = gtk_label_new (label);
 336   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.5, 0.5);
 337
 338   gtk_container_add (GTK_CONTAINER (button), label_widget);
 339   gtk_widget_show (label_widget);
 340
 341   return button;
 342 }
 343
 344 /**
 345  * gtk_button_new_from_stock:
 346  * @stock_id: the name of the stock item
 347  * @returns: a new #GtkButton
 348  *
 349  * Creates a new #GtkButton containing the image and text from a stock item.
 350  * Some stock ids have preprocessor macros like #GTK_STOCK_BUTTON_OK and
 351  * #GTK_STOCK_BUTTON_APPLY.
 352  **/
 353 GtkWidget*
 354 gtk_button_new_from_stock (const gchar   *stock_id)
 355 {
 356   GtkWidget *button;
 357   GtkStockItem item;
 358
 359   if (gtk_stock_lookup (stock_id, &item))
 360     {
 361       GtkWidget *label;
 362       GtkWidget *image;
 363       GtkWidget *hbox;
 364
 365       button = gtk_button_new ();
 366
 367       label = gtk_label_new_with_mnemonic (item.label);
 368
 369       gtk_label_set_mnemonic_widget (GTK_LABEL (label), button);
 370
 371       image = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_BUTTON);
 372       hbox = gtk_hbox_new (FALSE, 0);
 373
 374       gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 2);
 375       gtk_box_pack_end (GTK_BOX (hbox), label, TRUE, TRUE, 2);
 376
 377       gtk_container_add (GTK_CONTAINER (button), hbox);
 378       gtk_widget_show_all (hbox);
 379     }
 380   else
 381     {
 382       button = gtk_button_new_with_mnemonic (stock_id);
 383     }
 384
 385   return button;
 386 }
 387
 388 /**
 389  * gtk_button_new_with_mnemonic:
 390  * @label: The text of the button, with an underscore in front of the
 391  *         mnemonic character
 392  * @returns: a new #GtkButton
 393  *
 394  * Creates a new #GtkButton containing a label.
 395  * If characters in @label are preceded by an underscore, they are underlined
 396  * indicating that they represent a keyboard accelerator called a mnemonic.
 397  * Pressing Alt and that key activates the button.
 398  **/
 399 GtkWidget*
 400 gtk_button_new_with_mnemonic (const gchar *label)
 401 {
 402   GtkWidget *button;
 403   GtkWidget *label_widget;
 404
 405   button = gtk_button_new ();
 406
 407   label_widget = gtk_label_new_with_mnemonic (label);
 408
 409   gtk_label_set_mnemonic_widget (GTK_LABEL (label_widget), button);
 410
 411   gtk_container_add (GTK_CONTAINER (button), label_widget);
 412   gtk_widget_show (label_widget);
 413
 414   return button;
 415 }
 416
 417 void
 418 gtk_button_pressed (GtkButton *button)
 419 {
 420   g_return_if_fail (button != NULL);
 421   g_return_if_fail (GTK_IS_BUTTON (button));
 422
 423   gtk_signal_emit (GTK_OBJECT (button), button_signals[PRESSED]);
 424 }
 425
 426 void
 427 gtk_button_released (GtkButton *button)
 428 {
 429   g_return_if_fail (button != NULL);
 430   g_return_if_fail (GTK_IS_BUTTON (button));
 431
 432   gtk_signal_emit (GTK_OBJECT (button), button_signals[RELEASED]);
 433 }
 434
 435 void
 436 gtk_button_clicked (GtkButton *button)
 437 {
 438   g_return_if_fail (button != NULL);
 439   g_return_if_fail (GTK_IS_BUTTON (button));
 440
 441   gtk_signal_emit (GTK_OBJECT (button), button_signals[CLICKED]);
 442 }
 443
 444 void
 445 gtk_button_enter (GtkButton *button)
 446 {
 447   g_return_if_fail (button != NULL);
 448   g_return_if_fail (GTK_IS_BUTTON (button));
 449
 450   gtk_signal_emit (GTK_OBJECT (button), button_signals[ENTER]);
 451 }
 452
 453 void
 454 gtk_button_leave (GtkButton *button)
 455 {
 456   g_return_if_fail (button != NULL);
 457   g_return_if_fail (GTK_IS_BUTTON (button));
 458
 459   gtk_signal_emit (GTK_OBJECT (button), button_signals[LEAVE]);
 460 }
 461
 462 void
 463 gtk_button_set_relief (GtkButton *button,
 464                        GtkReliefStyle newrelief)
 465 {
 466   g_return_if_fail (button != NULL);
 467   g_return_if_fail (GTK_IS_BUTTON (button));
 468
 469   button->relief = newrelief;
 470   g_object_notify(G_OBJECT(button), "relief");
 471   gtk_widget_queue_draw (GTK_WIDGET (button));
 472 }
 473
 474 GtkReliefStyle
 475 gtk_button_get_relief (GtkButton *button)
 476 {
 477   g_return_val_if_fail (button != NULL, GTK_RELIEF_NORMAL);
 478   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
 479
 480   return button->relief;
 481 }
 482
 483 static void
 484 gtk_button_realize (GtkWidget *widget)
 485 {
 486   GtkButton *button;
 487   GdkWindowAttr attributes;
 488   gint attributes_mask;
 489   gint border_width;
 490
 491   g_return_if_fail (widget != NULL);
 492   g_return_if_fail (GTK_IS_BUTTON (widget));
 493
 494   button = GTK_BUTTON (widget);
 495   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 496
 497   border_width = GTK_CONTAINER (widget)->border_width;
 498
 499   attributes.window_type = GDK_WINDOW_CHILD;
 500   attributes.x = widget->allocation.x + border_width;
 501   attributes.y = widget->allocation.y + border_width;
 502   attributes.width = widget->allocation.width - border_width * 2;
 503   attributes.height = widget->allocation.height - border_width * 2;
 504   attributes.wclass = GDK_INPUT_OUTPUT;
 505   attributes.visual = gtk_widget_get_visual (widget);
 506   attributes.colormap = gtk_widget_get_colormap (widget);
 507   attributes.event_mask = gtk_widget_get_events (widget);
 508   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 509                             GDK_BUTTON_PRESS_MASK |
 510                             GDK_BUTTON_RELEASE_MASK |
 511                             GDK_ENTER_NOTIFY_MASK |
 512                             GDK_LEAVE_NOTIFY_MASK);
 513
 514   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 515
 516   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 517   gdk_window_set_user_data (widget->window, button);
 518
 519   widget->style = gtk_style_attach (widget->style, widget->window);
 520   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 521 }
 522
 523 static void
 524 gtk_button_unrealize (GtkWidget *widget)
 525 {
 526   GtkButton *button = GTK_BUTTON (widget);
 527
 528   if (button->activate_timeout)
 529     gtk_button_finish_activate (button, FALSE);
 530
 531   GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
 532 }
 533
 534 static void
 535 gtk_button_size_request (GtkWidget      *widget,
 536                          GtkRequisition *requisition)
 537 {
 538   GtkButton *button;
 539
 540   g_return_if_fail (widget != NULL);
 541   g_return_if_fail (GTK_IS_BUTTON (widget));
 542   g_return_if_fail (requisition != NULL);
 543
 544   button = GTK_BUTTON (widget);
 545
 546   requisition->width = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
 547                         GTK_WIDGET (widget)->style->xthickness) * 2;
 548   requisition->height = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
 549                          GTK_WIDGET (widget)->style->ythickness) * 2;
 550
 551   if (GTK_WIDGET_CAN_DEFAULT (widget))
 552     {
 553       requisition->width += (GTK_WIDGET (widget)->style->xthickness * 2 +
 554                              DEFAULT_SPACING);
 555       requisition->height += (GTK_WIDGET (widget)->style->ythickness * 2 +
 556                               DEFAULT_SPACING);
 557     }
 558
 559   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 560     {
 561       GtkRequisition child_requisition;
 562
 563       gtk_widget_size_request (GTK_BIN (button)->child, &child_requisition);
 564
 565       requisition->width += child_requisition.width;
 566       requisition->height += child_requisition.height;
 567     }
 568 }
 569
 570 static void
 571 gtk_button_size_allocate (GtkWidget     *widget,
 572                           GtkAllocation *allocation)
 573 {
 574   GtkButton *button;
 575   GtkAllocation child_allocation;
 576   gint border_width;
 577
 578   g_return_if_fail (widget != NULL);
 579   g_return_if_fail (GTK_IS_BUTTON (widget));
 580   g_return_if_fail (allocation != NULL);
 581
 582   widget->allocation = *allocation;
 583   border_width = GTK_CONTAINER (widget)->border_width;
 584
 585   if (GTK_WIDGET_REALIZED (widget))
 586     gdk_window_move_resize (widget->window,
 587                             widget->allocation.x + border_width,
 588                             widget->allocation.y + border_width,
 589                             widget->allocation.width - border_width * 2,
 590                             widget->allocation.height - border_width * 2);
 591
 592   button = GTK_BUTTON (widget);
 593
 594   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 595     {
 596       child_allocation.x = (CHILD_SPACING + GTK_WIDGET (widget)->style->xthickness);
 597       child_allocation.y = (CHILD_SPACING + GTK_WIDGET (widget)->style->ythickness);
 598
 599       child_allocation.width = MAX (1, (gint)widget->allocation.width - child_allocation.x * 2 -
 600                                  border_width * 2);
 601       child_allocation.height = MAX (1, (gint)widget->allocation.height - child_allocation.y * 2 -
 602                                   border_width * 2);
 603
 604       if (GTK_WIDGET_CAN_DEFAULT (button))
 605         {
 606           child_allocation.x += (GTK_WIDGET (widget)->style->xthickness +
 607                                  DEFAULT_LEFT_POS);
 608           child_allocation.y += (GTK_WIDGET (widget)->style->ythickness +
 609                                  DEFAULT_TOP_POS);
 610           child_allocation.width =  MAX (1, (gint)child_allocation.width -
 611                                          (gint)(GTK_WIDGET (widget)->style->xthickness * 2 + DEFAULT_SPACING));
 612           child_allocation.height = MAX (1, (gint)child_allocation.height -
 613                                          (gint)(GTK_WIDGET (widget)->style->xthickness * 2 + DEFAULT_SPACING));
 614         }
 615
 616       gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
 617     }
 618 }
 619
 620 /*
 621  * +------------------------------------------------+
 622  * |                   BORDER                       |
 623  * |  +------------------------------------------+  |
 624  * |  |\\\\\\\\\\\\\\\\DEFAULT\\\\\\\\\\\\\\\\\  |  |
 625  * |  |\\+------------------------------------+  |  |
 626  * |  |\\| |           SPACING       3      | |  |  |
 627  * |  |\\| +--------------------------------+ |  |  |
 628  * |  |\\| |########## FOCUS ###############| |  |  |
 629  * |  |\\| |#+----------------------------+#| |  |  |
 630  * |  |\\| |#|         RELIEF            \|#| |  |  |
 631  * |  |\\| |#|  +-----------------------+\|#| |  |  |
 632  * |  |\\|1|#|  +     THE TEXT          +\|#|2|  |  |
 633  * |  |\\| |#|  +-----------------------+\|#| |  |  |
 634  * |  |\\| |#| \\\\\ ythickness \\\\\\\\\\|#| |  |  |
 635  * |  |\\| |#+----------------------------+#| |  |  |
 636  * |  |\\| |########### 1 ##################| |  |  |
 637  * |  |\\| +--------------------------------+ |  |  |
 638  * |  |\\| |        default spacing   4     | |  |  |
 639  * |  |\\+------------------------------------+  |  |
 640  * |  |\            ythickness                   |  |
 641  * |  +------------------------------------------+  |
 642  * |                border_width                    |
 643  * +------------------------------------------------+
 644  */
 645
 646 static void
 647 gtk_button_paint (GtkWidget    *widget,
 648                   GdkRectangle *area)
 649 {
 650   GtkButton *button;
 651   GtkShadowType shadow_type;
 652   gint width, height;
 653   gint x, y;
 654
 655   if (GTK_WIDGET_DRAWABLE (widget))
 656     {
 657       button = GTK_BUTTON (widget);
 658
 659       x = 0;
 660       y = 0;
 661       width = widget->allocation.width - GTK_CONTAINER (widget)->border_width * 2;
 662       height = widget->allocation.height - GTK_CONTAINER (widget)->border_width * 2;
 663
 664       gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 665       gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 666
 667       if (GTK_WIDGET_HAS_DEFAULT (widget) &&
 668           GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
 669         {
 670           gtk_paint_box (widget->style, widget->window,
 671                          GTK_STATE_NORMAL, GTK_SHADOW_IN,
 672                          area, widget, "buttondefault",
 673                          x, y, width, height);
 674         }
 675
 676       if (GTK_WIDGET_CAN_DEFAULT (widget))
 677         {
 678           x += widget->style->xthickness;
 679           y += widget->style->ythickness;
 680           width -= 2 * x + DEFAULT_SPACING;
 681           height -= 2 * y + DEFAULT_SPACING;
 682           x += DEFAULT_LEFT_POS;
 683           y += DEFAULT_TOP_POS;
 684         }
 685
 686       if (GTK_WIDGET_HAS_FOCUS (widget))
 687         {
 688           x += 1;
 689           y += 1;
 690           width -= 2;
 691           height -= 2;
 692         }
 693
 694       if (GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE)
 695         shadow_type = GTK_SHADOW_IN;
 696       else
 697         shadow_type = GTK_SHADOW_OUT;
 698
 699       if ((button->relief != GTK_RELIEF_NONE) ||
 700           ((GTK_WIDGET_STATE(widget) != GTK_STATE_NORMAL) &&
 701            (GTK_WIDGET_STATE(widget) != GTK_STATE_INSENSITIVE)))
 702         gtk_paint_box (widget->style, widget->window,
 703                        GTK_WIDGET_STATE (widget),
 704                        shadow_type, area, widget, "button",
 705                        x, y, width, height);
 706
 707       if (GTK_WIDGET_HAS_FOCUS (widget))
 708         {
 709           x -= 1;
 710           y -= 1;
 711           width += 2;
 712           height += 2;
 713
 714           gtk_paint_focus (widget->style, widget->window,
 715                            area, widget, "button",
 716                            x, y, width - 1, height - 1);
 717         }
 718     }
 719 }
 720
 721 static gboolean
 722 gtk_button_expose (GtkWidget      *widget,
 723                    GdkEventExpose *event)
 724 {
 725   GtkBin *bin;
 726
 727   g_return_val_if_fail (widget != NULL, FALSE);
 728   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 729   g_return_val_if_fail (event != NULL, FALSE);
 730
 731   if (GTK_WIDGET_DRAWABLE (widget))
 732     {
 733       bin = GTK_BIN (widget);
 734
 735       gtk_button_paint (widget, &event->area);
 736
 737       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 738     }
 739
 740   return FALSE;
 741 }
 742
 743 static gboolean
 744 gtk_button_button_press (GtkWidget      *widget,
 745                          GdkEventButton *event)
 746 {
 747   GtkButton *button;
 748
 749   g_return_val_if_fail (widget != NULL, FALSE);
 750   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 751   g_return_val_if_fail (event != NULL, FALSE);
 752
 753   if (event->type == GDK_BUTTON_PRESS)
 754     {
 755       button = GTK_BUTTON (widget);
 756
 757       if (!GTK_WIDGET_HAS_FOCUS (widget))
 758         gtk_widget_grab_focus (widget);
 759
 760       if (event->button == 1)
 761         gtk_button_pressed (button);
 762     }
 763
 764   return TRUE;
 765 }
 766
 767 static gboolean
 768 gtk_button_button_release (GtkWidget      *widget,
 769                            GdkEventButton *event)
 770 {
 771   GtkButton *button;
 772
 773   g_return_val_if_fail (widget != NULL, FALSE);
 774   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 775   g_return_val_if_fail (event != NULL, FALSE);
 776
 777   if (event->button == 1)
 778     {
 779       button = GTK_BUTTON (widget);
 780       gtk_button_released (button);
 781     }
 782
 783   return TRUE;
 784 }
 785
 786 static gboolean
 787 gtk_button_key_release (GtkWidget   *widget,
 788                         GdkEventKey *event)
 789 {
 790   GtkButton *button = GTK_BUTTON (widget);
 791
 792   if (button->activate_timeout)
 793     {
 794       gtk_button_finish_activate (button, TRUE);
 795       return TRUE;
 796     }
 797   else if (GTK_WIDGET_CLASS (parent_class)->key_release_event)
 798     return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
 799   else
 800     return FALSE;
 801 }
 802
 803 static gboolean
 804 gtk_button_enter_notify (GtkWidget        *widget,
 805                          GdkEventCrossing *event)
 806 {
 807   GtkButton *button;
 808   GtkWidget *event_widget;
 809
 810   g_return_val_if_fail (widget != NULL, FALSE);
 811   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 812   g_return_val_if_fail (event != NULL, FALSE);
 813
 814   button = GTK_BUTTON (widget);
 815   event_widget = gtk_get_event_widget ((GdkEvent*) event);
 816
 817   if ((event_widget == widget) &&
 818       (event->detail != GDK_NOTIFY_INFERIOR))
 819     {
 820       button->in_button = TRUE;
 821       gtk_button_enter (button);
 822     }
 823
 824   return FALSE;
 825 }
 826
 827 static gboolean
 828 gtk_button_leave_notify (GtkWidget        *widget,
 829                          GdkEventCrossing *event)
 830 {
 831   GtkButton *button;
 832   GtkWidget *event_widget;
 833
 834   g_return_val_if_fail (widget != NULL, FALSE);
 835   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 836   g_return_val_if_fail (event != NULL, FALSE);
 837
 838   button = GTK_BUTTON (widget);
 839   event_widget = gtk_get_event_widget ((GdkEvent*) event);
 840
 841   if ((event_widget == widget) &&
 842       (event->detail != GDK_NOTIFY_INFERIOR))
 843     {
 844       button->in_button = FALSE;
 845       gtk_button_leave (button);
 846     }
 847
 848   return FALSE;
 849 }
 850
 851 static void
 852 gtk_button_add (GtkContainer *container,
 853                 GtkWidget    *widget)
 854 {
 855   g_return_if_fail (container != NULL);
 856   g_return_if_fail (widget != NULL);
 857
 858   if (GTK_CONTAINER_CLASS (parent_class)->add)
 859     GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
 860
 861   GTK_BUTTON (container)->child = GTK_BIN (container)->child;
 862 }
 863
 864 static void
 865 gtk_button_remove (GtkContainer *container,
 866                    GtkWidget    *widget)
 867 {
 868   g_return_if_fail (container != NULL);
 869   g_return_if_fail (widget != NULL);
 870
 871   if (GTK_CONTAINER_CLASS (parent_class)->remove)
 872     GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
 873
 874   GTK_BUTTON (container)->child = GTK_BIN (container)->child;
 875 }
 876
 877 static void
 878 gtk_real_button_pressed (GtkButton *button)
 879 {
 880   GtkStateType new_state;
 881
 882   g_return_if_fail (button != NULL);
 883   g_return_if_fail (GTK_IS_BUTTON (button));
 884
 885   if (button->activate_timeout)
 886     return;
 887
 888   button->button_down = TRUE;
 889
 890   new_state = (button->in_button ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL);
 891
 892   if (GTK_WIDGET_STATE (button) != new_state)
 893     {
 894       gtk_widget_set_state (GTK_WIDGET (button), new_state);
 895       gtk_widget_queue_draw (GTK_WIDGET (button));
 896     }
 897 }
 898
 899 static void
 900 gtk_real_button_released (GtkButton *button)
 901 {
 902   GtkStateType new_state;
 903
 904   g_return_if_fail (button != NULL);
 905   g_return_if_fail (GTK_IS_BUTTON (button));
 906
 907   if (button->button_down)
 908     {
 909       button->button_down = FALSE;
 910
 911       if (button->activate_timeout)
 912         return;
 913
 914       if (button->in_button)
 915         gtk_button_clicked (button);
 916
 917       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 918
 919       if (GTK_WIDGET_STATE (button) != new_state)
 920         {
 921           gtk_widget_set_state (GTK_WIDGET (button), new_state);
 922           /* We _draw () instead of queue_draw so that if the operation
 923            * blocks, the label doesn't vanish.
 924            */
 925           gtk_widget_draw (GTK_WIDGET (button), NULL);
 926         }
 927     }
 928 }
 929
 930 static void
 931 gtk_real_button_enter (GtkButton *button)
 932 {
 933   GtkStateType new_state;
 934
 935   g_return_if_fail (button != NULL);
 936   g_return_if_fail (GTK_IS_BUTTON (button));
 937
 938   new_state = (button->button_down ? GTK_STATE_ACTIVE : GTK_STATE_PRELIGHT);
 939
 940   if (button->activate_timeout)
 941     return;
 942
 943   if (GTK_WIDGET_STATE (button) != new_state)
 944     {
 945       gtk_widget_set_state (GTK_WIDGET (button), new_state);
 946       gtk_widget_queue_draw (GTK_WIDGET (button));
 947     }
 948 }
 949
 950 static void
 951 gtk_real_button_leave (GtkButton *button)
 952 {
 953   g_return_if_fail (button != NULL);
 954   g_return_if_fail (GTK_IS_BUTTON (button));
 955
 956   if (button->activate_timeout)
 957     return;
 958
 959   if (GTK_WIDGET_STATE (button) != GTK_STATE_NORMAL)
 960     {
 961       gtk_widget_set_state (GTK_WIDGET (button), GTK_STATE_NORMAL);
 962       gtk_widget_queue_draw (GTK_WIDGET (button));
 963     }
 964 }
 965
 966 static gboolean
 967 button_activate_timeout (gpointer data)
 968 {
 969   gtk_button_finish_activate (data, TRUE);
 970
 971   return FALSE;
 972 }
 973
 974 static void
 975 gtk_real_button_activate (GtkButton *button)
 976 {
 977   GtkWidget *widget = GTK_WIDGET (button);
 978
 979   g_return_if_fail (button != NULL);
 980   g_return_if_fail (GTK_IS_BUTTON (button));
 981
 982   if (GTK_WIDGET_REALIZED (button) && !button->activate_timeout)
 983     {
 984       if (gdk_keyboard_grab (widget->window, TRUE,
 985                              gtk_get_current_event_time ()) == 0)
 986         {
 987           gtk_grab_add (widget);
 988
 989           button->activate_timeout = g_timeout_add (ACTIVATE_TIMEOUT,
 990                                                     button_activate_timeout,
 991                                                     button);
 992           button->button_down = TRUE;
 993           gtk_widget_set_state (widget, GTK_STATE_ACTIVE);
 994         }
 995     }
 996 }
 997
 998 static void
 999 gtk_button_finish_activate (GtkButton *button,
1000                             gboolean   do_it)
1001 {
1002   GtkWidget *widget = GTK_WIDGET (button);
1003
1004   g_source_remove (button->activate_timeout);
1005   button->activate_timeout = 0;
1006
1007   gdk_keyboard_ungrab (gtk_get_current_event_time ());
1008   gtk_grab_remove (widget);
1009
1010   button->button_down = FALSE;
1011   gtk_widget_set_state (GTK_WIDGET (button),
1012                         button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
1013
1014   if (do_it)
1015     gtk_button_clicked (button);
1016 }
1017