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 1997-2000.  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 <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
  37 #define CHILD_SPACING     1
  38 #define DEFAULT_LEFT_POS  4
  39 #define DEFAULT_TOP_POS   4
  40 #define DEFAULT_SPACING   7
  41
  42 /* Time out before giving up on getting a key release when animatng
  43  * the close button.
  44  */
  45 #define ACTIVATE_TIMEOUT 250
  46
  47 enum {
  48   PRESSED,
  49   RELEASED,
  50   CLICKED,
  51   ENTER,
  52   LEAVE,
  53   ACTIVATE,
  54   LAST_SIGNAL
  55 };
  56
  57 enum {
  58   ARG_0,
  59   ARG_LABEL,
  60   ARG_RELIEF
  61 };
  62
  63 static void gtk_button_class_init     (GtkButtonClass   *klass);
  64 static void gtk_button_init           (GtkButton        *button);
  65 static void gtk_button_set_arg        (GtkObject        *object,
  66                                        GtkArg           *arg,
  67                                        guint             arg_id);
  68 static void gtk_button_get_arg        (GtkObject        *object,
  69                                        GtkArg           *arg,
  70                                        guint             arg_id);
  71 static void gtk_button_realize        (GtkWidget        *widget);
  72 static void gtk_button_unrealize      (GtkWidget        *widget);
  73 static void gtk_button_size_request   (GtkWidget        *widget,
  74                                        GtkRequisition   *requisition);
  75 static void gtk_button_size_allocate  (GtkWidget        *widget,
  76                                        GtkAllocation    *allocation);
  77 static void gtk_button_paint          (GtkWidget        *widget,
  78                                        GdkRectangle     *area);
  79 static gint gtk_button_expose         (GtkWidget        *widget,
  80                                        GdkEventExpose   *event);
  81 static gint gtk_button_button_press   (GtkWidget        *widget,
  82                                        GdkEventButton   *event);
  83 static gint gtk_button_button_release (GtkWidget        *widget,
  84                                        GdkEventButton   *event);
  85 static gint gtk_button_key_release    (GtkWidget        *widget,
  86                                        GdkEventKey      *event);
  87 static gint gtk_button_enter_notify   (GtkWidget        *widget,
  88                                        GdkEventCrossing *event);
  89 static gint gtk_button_leave_notify   (GtkWidget        *widget,
  90                                        GdkEventCrossing *event);
  91 static void gtk_button_add            (GtkContainer     *container,
  92                                        GtkWidget        *widget);
  93 static void gtk_button_remove         (GtkContainer     *container,
  94                                        GtkWidget        *widget);
  95 static void gtk_real_button_pressed   (GtkButton        *button);
  96 static void gtk_real_button_released  (GtkButton        *button);
  97 static void gtk_real_button_enter     (GtkButton        *button);
  98 static void gtk_real_button_leave     (GtkButton        *button);
  99 static void gtk_real_button_activate (GtkButton         *button);
 100 static GtkType gtk_button_child_type  (GtkContainer     *container);
 101
 102 static void gtk_button_finish_activate (GtkButton *button,
 103                                         gboolean   do_it);
 104
 105 static GtkBinClass *parent_class = NULL;
 106 static guint button_signals[LAST_SIGNAL] = { 0 };
 107
 108
 109 GtkType
 110 gtk_button_get_type (void)
 111 {
 112   static GtkType button_type = 0;
 113
 114   if (!button_type)
 115     {
 116       static const GTypeInfo button_info =
 117       {
 118         sizeof (GtkButtonClass),
 119         NULL,           /* base_init */
 120         NULL,           /* base_finalize */
 121         (GClassInitFunc) gtk_button_class_init,
 122         NULL,           /* class_finalize */
 123         NULL,           /* class_data */
 124         sizeof (GtkButton),
 125         16,             /* n_preallocs */
 126         (GInstanceInitFunc) gtk_button_init,
 127       };
 128
 129       button_type = g_type_register_static (GTK_TYPE_BIN, "GtkButton", &button_info, 0);
 130     }
 131
 132   return button_type;
 133 }
 134
 135 static void
 136 gtk_button_class_init (GtkButtonClass *klass)
 137 {
 138   GtkObjectClass *object_class;
 139   GtkWidgetClass *widget_class;
 140   GtkContainerClass *container_class;
 141
 142   object_class = (GtkObjectClass*) klass;
 143   widget_class = (GtkWidgetClass*) klass;
 144   container_class = (GtkContainerClass*) klass;
 145
 146   parent_class = g_type_class_peek_parent (klass);
 147
 148   object_class->set_arg = gtk_button_set_arg;
 149   object_class->get_arg = gtk_button_get_arg;
 150
 151   widget_class->realize = gtk_button_realize;
 152   widget_class->unrealize = gtk_button_unrealize;
 153   widget_class->size_request = gtk_button_size_request;
 154   widget_class->size_allocate = gtk_button_size_allocate;
 155   widget_class->expose_event = gtk_button_expose;
 156   widget_class->button_press_event = gtk_button_button_press;
 157   widget_class->button_release_event = gtk_button_button_release;
 158   widget_class->key_release_event = gtk_button_key_release;
 159   widget_class->enter_notify_event = gtk_button_enter_notify;
 160   widget_class->leave_notify_event = gtk_button_leave_notify;
 161
 162   container_class->add = gtk_button_add;
 163   container_class->remove = gtk_button_remove;
 164   container_class->child_type = gtk_button_child_type;
 165
 166   klass->pressed = gtk_real_button_pressed;
 167   klass->released = gtk_real_button_released;
 168   klass->clicked = NULL;
 169   klass->enter = gtk_real_button_enter;
 170   klass->leave = gtk_real_button_leave;
 171   klass->activate = gtk_real_button_activate;
 172
 173   gtk_object_add_arg_type ("GtkButton::label", GTK_TYPE_STRING, GTK_ARG_READWRITE, ARG_LABEL);
 174   gtk_object_add_arg_type ("GtkButton::relief", GTK_TYPE_RELIEF_STYLE, GTK_ARG_READWRITE, ARG_RELIEF);
 175
 176   button_signals[PRESSED] =
 177     gtk_signal_new ("pressed",
 178                     GTK_RUN_FIRST,
 179                     GTK_CLASS_TYPE (object_class),
 180                     GTK_SIGNAL_OFFSET (GtkButtonClass, pressed),
 181                     gtk_marshal_VOID__VOID,
 182                     GTK_TYPE_NONE, 0);
 183   button_signals[RELEASED] =
 184     gtk_signal_new ("released",
 185                     GTK_RUN_FIRST,
 186                     GTK_CLASS_TYPE (object_class),
 187                     GTK_SIGNAL_OFFSET (GtkButtonClass, released),
 188                     gtk_marshal_VOID__VOID,
 189                     GTK_TYPE_NONE, 0);
 190   button_signals[CLICKED] =
 191     gtk_signal_new ("clicked",
 192                     GTK_RUN_FIRST | GTK_RUN_ACTION,
 193                     GTK_CLASS_TYPE (object_class),
 194                     GTK_SIGNAL_OFFSET (GtkButtonClass, clicked),
 195                     gtk_marshal_VOID__VOID,
 196                     GTK_TYPE_NONE, 0);
 197   button_signals[ENTER] =
 198     gtk_signal_new ("enter",
 199                     GTK_RUN_FIRST,
 200                     GTK_CLASS_TYPE (object_class),
 201                     GTK_SIGNAL_OFFSET (GtkButtonClass, enter),
 202                     gtk_marshal_VOID__VOID,
 203                     GTK_TYPE_NONE, 0);
 204   button_signals[LEAVE] =
 205     gtk_signal_new ("leave",
 206                     GTK_RUN_FIRST,
 207                     GTK_CLASS_TYPE (object_class),
 208                     GTK_SIGNAL_OFFSET (GtkButtonClass, leave),
 209                     gtk_marshal_VOID__VOID,
 210                     GTK_TYPE_NONE, 0);
 211   button_signals[ACTIVATE] =
 212     gtk_signal_new ("activate",
 213                     GTK_RUN_FIRST,
 214                     GTK_CLASS_TYPE (object_class),
 215                     GTK_SIGNAL_OFFSET (GtkButtonClass, activate),
 216                     gtk_marshal_VOID__VOID,
 217                     GTK_TYPE_NONE, 0);
 218   widget_class->activate_signal = button_signals[ACTIVATE];
 219 }
 220
 221 static void
 222 gtk_button_init (GtkButton *button)
 223 {
 224   GTK_WIDGET_SET_FLAGS (button, GTK_CAN_FOCUS | GTK_RECEIVES_DEFAULT);
 225   GTK_WIDGET_UNSET_FLAGS (button, GTK_NO_WINDOW);
 226
 227   button->child = NULL;
 228   button->in_button = FALSE;
 229   button->button_down = FALSE;
 230   button->relief = GTK_RELIEF_NORMAL;
 231 }
 232
 233 static GtkType
 234 gtk_button_child_type  (GtkContainer     *container)
 235 {
 236   if (!GTK_BIN (container)->child)
 237     return GTK_TYPE_WIDGET;
 238   else
 239     return GTK_TYPE_NONE;
 240 }
 241
 242 static void
 243 gtk_button_set_arg (GtkObject *object,
 244                     GtkArg    *arg,
 245                     guint      arg_id)
 246 {
 247   GtkButton *button;
 248
 249   button = GTK_BUTTON (object);
 250
 251   switch (arg_id)
 252     {
 253       GtkWidget *child;
 254
 255     case ARG_LABEL:
 256       child = GTK_BIN (button)->child;
 257       if (!child)
 258         child = gtk_widget_new (GTK_TYPE_LABEL,
 259                                 "visible", TRUE,
 260                                 "parent", button,
 261                                 NULL);
 262       if (GTK_IS_LABEL (child))
 263         gtk_label_set_text (GTK_LABEL (child),
 264                        GTK_VALUE_STRING (*arg) ? GTK_VALUE_STRING (*arg) : "");
 265       break;
 266     case ARG_RELIEF:
 267       gtk_button_set_relief (button, GTK_VALUE_ENUM (*arg));
 268       break;
 269     default:
 270       break;
 271     }
 272 }
 273
 274 static void
 275 gtk_button_get_arg (GtkObject *object,
 276                     GtkArg    *arg,
 277                     guint      arg_id)
 278 {
 279   GtkButton *button;
 280
 281   button = GTK_BUTTON (object);
 282
 283   switch (arg_id)
 284     {
 285     case ARG_LABEL:
 286       if (GTK_BIN (button)->child && GTK_IS_LABEL (GTK_BIN (button)->child))
 287         GTK_VALUE_STRING (*arg) = g_strdup (GTK_LABEL (GTK_BIN (button)->child)->label);
 288       else
 289         GTK_VALUE_STRING (*arg) = NULL;
 290       break;
 291     case ARG_RELIEF:
 292       GTK_VALUE_ENUM (*arg) = gtk_button_get_relief (button);
 293       break;
 294     default:
 295       arg->type = GTK_TYPE_INVALID;
 296       break;
 297     }
 298 }
 299
 300 GtkWidget*
 301 gtk_button_new (void)
 302 {
 303   return GTK_WIDGET (gtk_type_new (gtk_button_get_type ()));
 304 }
 305
 306 GtkWidget*
 307 gtk_button_new_with_label (const gchar *label)
 308 {
 309   GtkWidget *button;
 310   GtkWidget *label_widget;
 311
 312   button = gtk_button_new ();
 313   label_widget = gtk_label_new (label);
 314   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.5, 0.5);
 315
 316   gtk_container_add (GTK_CONTAINER (button), label_widget);
 317   gtk_widget_show (label_widget);
 318
 319   return button;
 320 }
 321
 322 /**
 323  * gtk_button_new_from_stock:
 324  * @stock_id: the name of the stock item
 325  * @returns: a new #GtkButton
 326  *
 327  * Creates a new #GtkButton containing the image and text from a stock item.
 328  * Some stock ids have preprocessor macros like #GTK_STOCK_BUTTON_OK and
 329  * #GTK_STOCK_BUTTON_APPLY.
 330  **/
 331 GtkWidget*
 332 gtk_button_new_from_stock (const gchar   *stock_id)
 333 {
 334   GtkWidget *button;
 335   GtkStockItem item;
 336
 337   if (gtk_stock_lookup (stock_id, &item))
 338     {
 339       GtkWidget *label;
 340       GtkWidget *image;
 341       GtkWidget *hbox;
 342
 343       button = gtk_button_new ();
 344
 345       label = gtk_label_new_with_mnemonic (item.label);
 346
 347       gtk_label_set_mnemonic_widget (GTK_LABEL (label), button);
 348
 349       image = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_BUTTON);
 350       hbox = gtk_hbox_new (FALSE, 0);
 351
 352       gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 2);
 353       gtk_box_pack_end (GTK_BOX (hbox), label, TRUE, TRUE, 2);
 354
 355       gtk_container_add (GTK_CONTAINER (button), hbox);
 356       gtk_widget_show_all (hbox);
 357     }
 358   else
 359     {
 360       button = gtk_button_new_with_mnemonic (stock_id);
 361     }
 362
 363   return button;
 364 }
 365
 366 /**
 367  * gtk_button_new_with_mnemonic:
 368  * @label: The text of the button, with an underscore in front of the
 369  *         mnemonic character
 370  * @returns: a new #GtkButton
 371  *
 372  * Creates a new #GtkButton containing a label.
 373  * If characters in @label are preceded by an underscore, they are underlined
 374  * indicating that they represent a keyboard accelerator called a mnemonic.
 375  * Pressing Alt and that key activates the button.
 376  **/
 377 GtkWidget*
 378 gtk_button_new_with_mnemonic (const gchar *label)
 379 {
 380   GtkWidget *button;
 381   GtkWidget *label_widget;
 382
 383   button = gtk_button_new ();
 384
 385   label_widget = gtk_label_new_with_mnemonic (label);
 386
 387   gtk_label_set_mnemonic_widget (GTK_LABEL (label_widget), button);
 388
 389   gtk_container_add (GTK_CONTAINER (button), label_widget);
 390   gtk_widget_show (label_widget);
 391
 392   return button;
 393 }
 394
 395 void
 396 gtk_button_pressed (GtkButton *button)
 397 {
 398   g_return_if_fail (button != NULL);
 399   g_return_if_fail (GTK_IS_BUTTON (button));
 400
 401   gtk_signal_emit (GTK_OBJECT (button), button_signals[PRESSED]);
 402 }
 403
 404 void
 405 gtk_button_released (GtkButton *button)
 406 {
 407   g_return_if_fail (button != NULL);
 408   g_return_if_fail (GTK_IS_BUTTON (button));
 409
 410   gtk_signal_emit (GTK_OBJECT (button), button_signals[RELEASED]);
 411 }
 412
 413 void
 414 gtk_button_clicked (GtkButton *button)
 415 {
 416   g_return_if_fail (button != NULL);
 417   g_return_if_fail (GTK_IS_BUTTON (button));
 418
 419   gtk_signal_emit (GTK_OBJECT (button), button_signals[CLICKED]);
 420 }
 421
 422 void
 423 gtk_button_enter (GtkButton *button)
 424 {
 425   g_return_if_fail (button != NULL);
 426   g_return_if_fail (GTK_IS_BUTTON (button));
 427
 428   gtk_signal_emit (GTK_OBJECT (button), button_signals[ENTER]);
 429 }
 430
 431 void
 432 gtk_button_leave (GtkButton *button)
 433 {
 434   g_return_if_fail (button != NULL);
 435   g_return_if_fail (GTK_IS_BUTTON (button));
 436
 437   gtk_signal_emit (GTK_OBJECT (button), button_signals[LEAVE]);
 438 }
 439
 440 void
 441 gtk_button_set_relief (GtkButton *button,
 442                        GtkReliefStyle newrelief)
 443 {
 444   g_return_if_fail (button != NULL);
 445   g_return_if_fail (GTK_IS_BUTTON (button));
 446
 447   button->relief = newrelief;
 448   gtk_widget_queue_draw (GTK_WIDGET (button));
 449 }
 450
 451 GtkReliefStyle
 452 gtk_button_get_relief (GtkButton *button)
 453 {
 454   g_return_val_if_fail (button != NULL, GTK_RELIEF_NORMAL);
 455   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
 456
 457   return button->relief;
 458 }
 459
 460 static void
 461 gtk_button_realize (GtkWidget *widget)
 462 {
 463   GtkButton *button;
 464   GdkWindowAttr attributes;
 465   gint attributes_mask;
 466   gint border_width;
 467
 468   g_return_if_fail (widget != NULL);
 469   g_return_if_fail (GTK_IS_BUTTON (widget));
 470
 471   button = GTK_BUTTON (widget);
 472   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 473
 474   border_width = GTK_CONTAINER (widget)->border_width;
 475
 476   attributes.window_type = GDK_WINDOW_CHILD;
 477   attributes.x = widget->allocation.x + border_width;
 478   attributes.y = widget->allocation.y + border_width;
 479   attributes.width = widget->allocation.width - border_width * 2;
 480   attributes.height = widget->allocation.height - border_width * 2;
 481   attributes.wclass = GDK_INPUT_OUTPUT;
 482   attributes.visual = gtk_widget_get_visual (widget);
 483   attributes.colormap = gtk_widget_get_colormap (widget);
 484   attributes.event_mask = gtk_widget_get_events (widget);
 485   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 486                             GDK_BUTTON_PRESS_MASK |
 487                             GDK_BUTTON_RELEASE_MASK |
 488                             GDK_ENTER_NOTIFY_MASK |
 489                             GDK_LEAVE_NOTIFY_MASK);
 490
 491   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 492
 493   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 494   gdk_window_set_user_data (widget->window, button);
 495
 496   widget->style = gtk_style_attach (widget->style, widget->window);
 497   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 498 }
 499
 500 static void
 501 gtk_button_unrealize (GtkWidget *widget)
 502 {
 503   GtkButton *button = GTK_BUTTON (widget);
 504
 505   if (button->activate_timeout)
 506     gtk_button_finish_activate (button, FALSE);
 507
 508   GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
 509 }
 510
 511 static void
 512 gtk_button_size_request (GtkWidget      *widget,
 513                          GtkRequisition *requisition)
 514 {
 515   GtkButton *button;
 516
 517   g_return_if_fail (widget != NULL);
 518   g_return_if_fail (GTK_IS_BUTTON (widget));
 519   g_return_if_fail (requisition != NULL);
 520
 521   button = GTK_BUTTON (widget);
 522
 523   requisition->width = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
 524                         GTK_WIDGET (widget)->style->xthickness) * 2;
 525   requisition->height = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
 526                          GTK_WIDGET (widget)->style->ythickness) * 2;
 527
 528   if (GTK_WIDGET_CAN_DEFAULT (widget))
 529     {
 530       requisition->width += (GTK_WIDGET (widget)->style->xthickness * 2 +
 531                              DEFAULT_SPACING);
 532       requisition->height += (GTK_WIDGET (widget)->style->ythickness * 2 +
 533                               DEFAULT_SPACING);
 534     }
 535
 536   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 537     {
 538       GtkRequisition child_requisition;
 539
 540       gtk_widget_size_request (GTK_BIN (button)->child, &child_requisition);
 541
 542       requisition->width += child_requisition.width;
 543       requisition->height += child_requisition.height;
 544     }
 545 }
 546
 547 static void
 548 gtk_button_size_allocate (GtkWidget     *widget,
 549                           GtkAllocation *allocation)
 550 {
 551   GtkButton *button;
 552   GtkAllocation child_allocation;
 553   gint border_width;
 554
 555   g_return_if_fail (widget != NULL);
 556   g_return_if_fail (GTK_IS_BUTTON (widget));
 557   g_return_if_fail (allocation != NULL);
 558
 559   widget->allocation = *allocation;
 560   border_width = GTK_CONTAINER (widget)->border_width;
 561
 562   if (GTK_WIDGET_REALIZED (widget))
 563     gdk_window_move_resize (widget->window,
 564                             widget->allocation.x + border_width,
 565                             widget->allocation.y + border_width,
 566                             widget->allocation.width - border_width * 2,
 567                             widget->allocation.height - border_width * 2);
 568
 569   button = GTK_BUTTON (widget);
 570
 571   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 572     {
 573       child_allocation.x = (CHILD_SPACING + GTK_WIDGET (widget)->style->xthickness);
 574       child_allocation.y = (CHILD_SPACING + GTK_WIDGET (widget)->style->ythickness);
 575
 576       child_allocation.width = MAX (1, (gint)widget->allocation.width - child_allocation.x * 2 -
 577                                  border_width * 2);
 578       child_allocation.height = MAX (1, (gint)widget->allocation.height - child_allocation.y * 2 -
 579                                   border_width * 2);
 580
 581       if (GTK_WIDGET_CAN_DEFAULT (button))
 582         {
 583           child_allocation.x += (GTK_WIDGET (widget)->style->xthickness +
 584                                  DEFAULT_LEFT_POS);
 585           child_allocation.y += (GTK_WIDGET (widget)->style->ythickness +
 586                                  DEFAULT_TOP_POS);
 587           child_allocation.width =  MAX (1, (gint)child_allocation.width -
 588                                          (gint)(GTK_WIDGET (widget)->style->xthickness * 2 + DEFAULT_SPACING));
 589           child_allocation.height = MAX (1, (gint)child_allocation.height -
 590                                          (gint)(GTK_WIDGET (widget)->style->xthickness * 2 + DEFAULT_SPACING));
 591         }
 592
 593       gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
 594     }
 595 }
 596
 597 /*
 598  * +------------------------------------------------+
 599  * |                   BORDER                       |
 600  * |  +------------------------------------------+  |
 601  * |  |\\\\\\\\\\\\\\\\DEFAULT\\\\\\\\\\\\\\\\\  |  |
 602  * |  |\\+------------------------------------+  |  |
 603  * |  |\\| |           SPACING       3      | |  |  |
 604  * |  |\\| +--------------------------------+ |  |  |
 605  * |  |\\| |########## FOCUS ###############| |  |  |
 606  * |  |\\| |#+----------------------------+#| |  |  |
 607  * |  |\\| |#|         RELIEF            \|#| |  |  |
 608  * |  |\\| |#|  +-----------------------+\|#| |  |  |
 609  * |  |\\|1|#|  +     THE TEXT          +\|#|2|  |  |
 610  * |  |\\| |#|  +-----------------------+\|#| |  |  |
 611  * |  |\\| |#| \\\\\ ythickness \\\\\\\\\\|#| |  |  |
 612  * |  |\\| |#+----------------------------+#| |  |  |
 613  * |  |\\| |########### 1 ##################| |  |  |
 614  * |  |\\| +--------------------------------+ |  |  |
 615  * |  |\\| |        default spacing   4     | |  |  |
 616  * |  |\\+------------------------------------+  |  |
 617  * |  |\            ythickness                   |  |
 618  * |  +------------------------------------------+  |
 619  * |                border_width                    |
 620  * +------------------------------------------------+
 621  */
 622
 623 static void
 624 gtk_button_paint (GtkWidget    *widget,
 625                   GdkRectangle *area)
 626 {
 627   GtkButton *button;
 628   GtkShadowType shadow_type;
 629   gint width, height;
 630   gint x, y;
 631
 632   if (GTK_WIDGET_DRAWABLE (widget))
 633     {
 634       button = GTK_BUTTON (widget);
 635
 636       x = 0;
 637       y = 0;
 638       width = widget->allocation.width - GTK_CONTAINER (widget)->border_width * 2;
 639       height = widget->allocation.height - GTK_CONTAINER (widget)->border_width * 2;
 640
 641       gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 642       gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 643
 644       if (GTK_WIDGET_HAS_DEFAULT (widget) &&
 645           GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
 646         {
 647           gtk_paint_box (widget->style, widget->window,
 648                          GTK_STATE_NORMAL, GTK_SHADOW_IN,
 649                          area, widget, "buttondefault",
 650                          x, y, width, height);
 651         }
 652
 653       if (GTK_WIDGET_CAN_DEFAULT (widget))
 654         {
 655           x += widget->style->xthickness;
 656           y += widget->style->ythickness;
 657           width -= 2 * x + DEFAULT_SPACING;
 658           height -= 2 * y + DEFAULT_SPACING;
 659           x += DEFAULT_LEFT_POS;
 660           y += DEFAULT_TOP_POS;
 661         }
 662
 663       if (GTK_WIDGET_HAS_FOCUS (widget))
 664         {
 665           x += 1;
 666           y += 1;
 667           width -= 2;
 668           height -= 2;
 669         }
 670
 671       if (GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE)
 672         shadow_type = GTK_SHADOW_IN;
 673       else
 674         shadow_type = GTK_SHADOW_OUT;
 675
 676       if ((button->relief != GTK_RELIEF_NONE) ||
 677           ((GTK_WIDGET_STATE(widget) != GTK_STATE_NORMAL) &&
 678            (GTK_WIDGET_STATE(widget) != GTK_STATE_INSENSITIVE)))
 679         gtk_paint_box (widget->style, widget->window,
 680                        GTK_WIDGET_STATE (widget),
 681                        shadow_type, area, widget, "button",
 682                        x, y, width, height);
 683
 684       if (GTK_WIDGET_HAS_FOCUS (widget))
 685         {
 686           x -= 1;
 687           y -= 1;
 688           width += 2;
 689           height += 2;
 690
 691           gtk_paint_focus (widget->style, widget->window,
 692                            area, widget, "button",
 693                            x, y, width - 1, height - 1);
 694         }
 695     }
 696 }
 697
 698 static gboolean
 699 gtk_button_expose (GtkWidget      *widget,
 700                    GdkEventExpose *event)
 701 {
 702   GtkBin *bin;
 703
 704   g_return_val_if_fail (widget != NULL, FALSE);
 705   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 706   g_return_val_if_fail (event != NULL, FALSE);
 707
 708   if (GTK_WIDGET_DRAWABLE (widget))
 709     {
 710       bin = GTK_BIN (widget);
 711
 712       gtk_button_paint (widget, &event->area);
 713
 714       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 715     }
 716
 717   return FALSE;
 718 }
 719
 720 static gboolean
 721 gtk_button_button_press (GtkWidget      *widget,
 722                          GdkEventButton *event)
 723 {
 724   GtkButton *button;
 725
 726   g_return_val_if_fail (widget != NULL, FALSE);
 727   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 728   g_return_val_if_fail (event != NULL, FALSE);
 729
 730   if (event->type == GDK_BUTTON_PRESS)
 731     {
 732       button = GTK_BUTTON (widget);
 733
 734       if (!GTK_WIDGET_HAS_FOCUS (widget))
 735         gtk_widget_grab_focus (widget);
 736
 737       if (event->button == 1)
 738         gtk_button_pressed (button);
 739     }
 740
 741   return TRUE;
 742 }
 743
 744 static gboolean
 745 gtk_button_button_release (GtkWidget      *widget,
 746                            GdkEventButton *event)
 747 {
 748   GtkButton *button;
 749
 750   g_return_val_if_fail (widget != NULL, FALSE);
 751   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 752   g_return_val_if_fail (event != NULL, FALSE);
 753
 754   if (event->button == 1)
 755     {
 756       button = GTK_BUTTON (widget);
 757       gtk_button_released (button);
 758     }
 759
 760   return TRUE;
 761 }
 762
 763 static gboolean
 764 gtk_button_key_release (GtkWidget   *widget,
 765                         GdkEventKey *event)
 766 {
 767   GtkButton *button = GTK_BUTTON (widget);
 768
 769   if (button->activate_timeout)
 770     {
 771       gtk_button_finish_activate (button, TRUE);
 772       return TRUE;
 773     }
 774   else if (GTK_WIDGET_CLASS (parent_class)->key_release_event)
 775     return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
 776   else
 777     return FALSE;
 778 }
 779
 780 static gboolean
 781 gtk_button_enter_notify (GtkWidget        *widget,
 782                          GdkEventCrossing *event)
 783 {
 784   GtkButton *button;
 785   GtkWidget *event_widget;
 786
 787   g_return_val_if_fail (widget != NULL, FALSE);
 788   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 789   g_return_val_if_fail (event != NULL, FALSE);
 790
 791   button = GTK_BUTTON (widget);
 792   event_widget = gtk_get_event_widget ((GdkEvent*) event);
 793
 794   if ((event_widget == widget) &&
 795       (event->detail != GDK_NOTIFY_INFERIOR))
 796     {
 797       button->in_button = TRUE;
 798       gtk_button_enter (button);
 799     }
 800
 801   return FALSE;
 802 }
 803
 804 static gboolean
 805 gtk_button_leave_notify (GtkWidget        *widget,
 806                          GdkEventCrossing *event)
 807 {
 808   GtkButton *button;
 809   GtkWidget *event_widget;
 810
 811   g_return_val_if_fail (widget != NULL, FALSE);
 812   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 813   g_return_val_if_fail (event != NULL, FALSE);
 814
 815   button = GTK_BUTTON (widget);
 816   event_widget = gtk_get_event_widget ((GdkEvent*) event);
 817
 818   if ((event_widget == widget) &&
 819       (event->detail != GDK_NOTIFY_INFERIOR))
 820     {
 821       button->in_button = FALSE;
 822       gtk_button_leave (button);
 823     }
 824
 825   return FALSE;
 826 }
 827
 828 static void
 829 gtk_button_add (GtkContainer *container,
 830                 GtkWidget    *widget)
 831 {
 832   g_return_if_fail (container != NULL);
 833   g_return_if_fail (widget != NULL);
 834
 835   if (GTK_CONTAINER_CLASS (parent_class)->add)
 836     GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
 837
 838   GTK_BUTTON (container)->child = GTK_BIN (container)->child;
 839 }
 840
 841 static void
 842 gtk_button_remove (GtkContainer *container,
 843                    GtkWidget    *widget)
 844 {
 845   g_return_if_fail (container != NULL);
 846   g_return_if_fail (widget != NULL);
 847
 848   if (GTK_CONTAINER_CLASS (parent_class)->remove)
 849     GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
 850
 851   GTK_BUTTON (container)->child = GTK_BIN (container)->child;
 852 }
 853
 854 static void
 855 gtk_real_button_pressed (GtkButton *button)
 856 {
 857   GtkStateType new_state;
 858
 859   g_return_if_fail (button != NULL);
 860   g_return_if_fail (GTK_IS_BUTTON (button));
 861
 862   if (button->activate_timeout)
 863     return;
 864
 865   button->button_down = TRUE;
 866
 867   new_state = (button->in_button ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL);
 868
 869   if (GTK_WIDGET_STATE (button) != new_state)
 870     {
 871       gtk_widget_set_state (GTK_WIDGET (button), new_state);
 872       gtk_widget_queue_draw (GTK_WIDGET (button));
 873     }
 874 }
 875
 876 static void
 877 gtk_real_button_released (GtkButton *button)
 878 {
 879   GtkStateType new_state;
 880
 881   g_return_if_fail (button != NULL);
 882   g_return_if_fail (GTK_IS_BUTTON (button));
 883
 884   if (button->button_down)
 885     {
 886       button->button_down = FALSE;
 887
 888       if (button->activate_timeout)
 889         return;
 890
 891       if (button->in_button)
 892         gtk_button_clicked (button);
 893
 894       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 895
 896       if (GTK_WIDGET_STATE (button) != new_state)
 897         {
 898           gtk_widget_set_state (GTK_WIDGET (button), new_state);
 899           /* We _draw () instead of queue_draw so that if the operation
 900            * blocks, the label doesn't vanish.
 901            */
 902           gtk_widget_draw (GTK_WIDGET (button), NULL);
 903         }
 904     }
 905 }
 906
 907 static void
 908 gtk_real_button_enter (GtkButton *button)
 909 {
 910   GtkStateType new_state;
 911
 912   g_return_if_fail (button != NULL);
 913   g_return_if_fail (GTK_IS_BUTTON (button));
 914
 915   new_state = (button->button_down ? GTK_STATE_ACTIVE : GTK_STATE_PRELIGHT);
 916
 917   if (button->activate_timeout)
 918     return;
 919
 920   if (GTK_WIDGET_STATE (button) != new_state)
 921     {
 922       gtk_widget_set_state (GTK_WIDGET (button), new_state);
 923       gtk_widget_queue_draw (GTK_WIDGET (button));
 924     }
 925 }
 926
 927 static void
 928 gtk_real_button_leave (GtkButton *button)
 929 {
 930   g_return_if_fail (button != NULL);
 931   g_return_if_fail (GTK_IS_BUTTON (button));
 932
 933   if (button->activate_timeout)
 934     return;
 935
 936   if (GTK_WIDGET_STATE (button) != GTK_STATE_NORMAL)
 937     {
 938       gtk_widget_set_state (GTK_WIDGET (button), GTK_STATE_NORMAL);
 939       gtk_widget_queue_draw (GTK_WIDGET (button));
 940     }
 941 }
 942
 943 static gboolean
 944 button_activate_timeout (gpointer data)
 945 {
 946   gtk_button_finish_activate (data, TRUE);
 947
 948   return FALSE;
 949 }
 950
 951 static void
 952 gtk_real_button_activate (GtkButton *button)
 953 {
 954   GtkWidget *widget = GTK_WIDGET (button);
 955
 956   g_return_if_fail (button != NULL);
 957   g_return_if_fail (GTK_IS_BUTTON (button));
 958
 959   if (GTK_WIDGET_REALIZED (button) && !button->activate_timeout)
 960     {
 961       if (gdk_keyboard_grab (widget->window, TRUE,
 962                              gtk_get_current_event_time ()) == 0)
 963         {
 964           gtk_grab_add (widget);
 965
 966           button->activate_timeout = g_timeout_add (ACTIVATE_TIMEOUT,
 967                                                     button_activate_timeout,
 968                                                     button);
 969           button->button_down = TRUE;
 970           gtk_widget_set_state (widget, GTK_STATE_ACTIVE);
 971         }
 972     }
 973 }
 974
 975 static void
 976 gtk_button_finish_activate (GtkButton *button,
 977                             gboolean   do_it)
 978 {
 979   GtkWidget *widget = GTK_WIDGET (button);
 980
 981   g_source_remove (button->activate_timeout);
 982   button->activate_timeout = 0;
 983
 984   gdk_keyboard_ungrab (gtk_get_current_event_time ());
 985   gtk_grab_remove (widget);
 986
 987   button->button_down = FALSE;
 988   gtk_widget_set_state (GTK_WIDGET (button),
 989                         button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 990
 991   if (do_it)
 992     gtk_button_clicked (button);
 993 }
 994