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_SPACING   7
  40
  41 /* Time out before giving up on getting a key release when animatng
  42  * the close button.
  43  */
  44 #define ACTIVATE_TIMEOUT 250
  45
  46 enum {
  47   PRESSED,
  48   RELEASED,
  49   CLICKED,
  50   ENTER,
  51   LEAVE,
  52   ACTIVATE,
  53   LAST_SIGNAL
  54 };
  55
  56 enum {
  57   PROP_0,
  58   PROP_LABEL,
  59   PROP_RELIEF
  60 };
  61
  62 static void gtk_button_class_init     (GtkButtonClass   *klass);
  63 static void gtk_button_init           (GtkButton        *button);
  64 static void gtk_button_set_property   (GObject         *object,
  65                                        guint            prop_id,
  66                                        const GValue    *value,
  67                                        GParamSpec      *pspec);
  68 static void gtk_button_get_property   (GObject         *object,
  69                                        guint            prop_id,
  70                                        GValue          *value,
  71                                        GParamSpec      *pspec);
  72 static void gtk_button_realize        (GtkWidget        *widget);
  73 static void gtk_button_unrealize      (GtkWidget        *widget);
  74 static void gtk_button_size_request   (GtkWidget        *widget,
  75                                        GtkRequisition   *requisition);
  76 static void gtk_button_size_allocate  (GtkWidget        *widget,
  77                                        GtkAllocation    *allocation);
  78 static void gtk_button_paint          (GtkWidget        *widget,
  79                                        GdkRectangle     *area);
  80 static gint gtk_button_expose         (GtkWidget        *widget,
  81                                        GdkEventExpose   *event);
  82 static gint gtk_button_button_press   (GtkWidget        *widget,
  83                                        GdkEventButton   *event);
  84 static gint gtk_button_button_release (GtkWidget        *widget,
  85                                        GdkEventButton   *event);
  86 static gint gtk_button_key_release    (GtkWidget        *widget,
  87                                        GdkEventKey      *event);
  88 static gint gtk_button_enter_notify   (GtkWidget        *widget,
  89                                        GdkEventCrossing *event);
  90 static gint gtk_button_leave_notify   (GtkWidget        *widget,
  91                                        GdkEventCrossing *event);
  92 static void gtk_button_add            (GtkContainer     *container,
  93                                        GtkWidget        *widget);
  94 static void gtk_button_remove         (GtkContainer     *container,
  95                                        GtkWidget        *widget);
  96 static void gtk_real_button_pressed   (GtkButton        *button);
  97 static void gtk_real_button_released  (GtkButton        *button);
  98 static void gtk_real_button_enter     (GtkButton        *button);
  99 static void gtk_real_button_leave     (GtkButton        *button);
 100 static void gtk_real_button_activate (GtkButton         *button);
 101 static GtkType gtk_button_child_type  (GtkContainer     *container);
 102
 103 static void gtk_button_finish_activate (GtkButton *button,
 104                                         gboolean   do_it);
 105
 106 static GtkBinClass *parent_class = NULL;
 107 static guint button_signals[LAST_SIGNAL] = { 0 };
 108
 109
 110 GtkType
 111 gtk_button_get_type (void)
 112 {
 113   static GtkType button_type = 0;
 114
 115   if (!button_type)
 116     {
 117       static const GTypeInfo button_info =
 118       {
 119         sizeof (GtkButtonClass),
 120         NULL,           /* base_init */
 121         NULL,           /* base_finalize */
 122         (GClassInitFunc) gtk_button_class_init,
 123         NULL,           /* class_finalize */
 124         NULL,           /* class_data */
 125         sizeof (GtkButton),
 126         16,             /* n_preallocs */
 127         (GInstanceInitFunc) gtk_button_init,
 128       };
 129
 130       button_type = g_type_register_static (GTK_TYPE_BIN, "GtkButton", &button_info, 0);
 131     }
 132
 133   return button_type;
 134 }
 135
 136 static void
 137 gtk_button_class_init (GtkButtonClass *klass)
 138 {
 139   GtkObjectClass *object_class;
 140   GtkWidgetClass *widget_class;
 141   GtkContainerClass *container_class;
 142
 143   object_class = (GtkObjectClass*) klass;
 144   widget_class = (GtkWidgetClass*) klass;
 145   container_class = (GtkContainerClass*) klass;
 146
 147   parent_class = g_type_class_peek_parent (klass);
 148
 149   G_OBJECT_CLASS(object_class)->set_property = gtk_button_set_property;
 150   G_OBJECT_CLASS(object_class)->get_property = gtk_button_get_property;
 151
 152   widget_class->realize = gtk_button_realize;
 153   widget_class->unrealize = gtk_button_unrealize;
 154   widget_class->size_request = gtk_button_size_request;
 155   widget_class->size_allocate = gtk_button_size_allocate;
 156   widget_class->expose_event = gtk_button_expose;
 157   widget_class->button_press_event = gtk_button_button_press;
 158   widget_class->button_release_event = gtk_button_button_release;
 159   widget_class->key_release_event = gtk_button_key_release;
 160   widget_class->enter_notify_event = gtk_button_enter_notify;
 161   widget_class->leave_notify_event = gtk_button_leave_notify;
 162
 163   container_class->add = gtk_button_add;
 164   container_class->remove = gtk_button_remove;
 165   container_class->child_type = gtk_button_child_type;
 166
 167   klass->pressed = gtk_real_button_pressed;
 168   klass->released = gtk_real_button_released;
 169   klass->clicked = NULL;
 170   klass->enter = gtk_real_button_enter;
 171   klass->leave = gtk_real_button_leave;
 172   klass->activate = gtk_real_button_activate;
 173
 174   g_object_class_install_property (G_OBJECT_CLASS(object_class),
 175                                    PROP_LABEL,
 176                                    g_param_spec_string ("label",
 177                                                         _("Label"),
 178                                                         _("Text of the label widget inside the button, if the button contains a label widget."),
 179                                                         NULL,
 180                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 181
 182   g_object_class_install_property (G_OBJECT_CLASS(object_class),
 183                                    PROP_RELIEF,
 184                                    g_param_spec_enum ("relief",
 185                                                       _("Border relief"),
 186                                                       _("The border relief style."),
 187                                                       GTK_TYPE_RELIEF_STYLE,
 188                                                       GTK_RELIEF_NORMAL,
 189                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 190
 191   button_signals[PRESSED] =
 192     gtk_signal_new ("pressed",
 193                     GTK_RUN_FIRST,
 194                     GTK_CLASS_TYPE (object_class),
 195                     GTK_SIGNAL_OFFSET (GtkButtonClass, pressed),
 196                     gtk_marshal_VOID__VOID,
 197                     GTK_TYPE_NONE, 0);
 198   button_signals[RELEASED] =
 199     gtk_signal_new ("released",
 200                     GTK_RUN_FIRST,
 201                     GTK_CLASS_TYPE (object_class),
 202                     GTK_SIGNAL_OFFSET (GtkButtonClass, released),
 203                     gtk_marshal_VOID__VOID,
 204                     GTK_TYPE_NONE, 0);
 205   button_signals[CLICKED] =
 206     gtk_signal_new ("clicked",
 207                     GTK_RUN_FIRST | GTK_RUN_ACTION,
 208                     GTK_CLASS_TYPE (object_class),
 209                     GTK_SIGNAL_OFFSET (GtkButtonClass, clicked),
 210                     gtk_marshal_VOID__VOID,
 211                     GTK_TYPE_NONE, 0);
 212   button_signals[ENTER] =
 213     gtk_signal_new ("enter",
 214                     GTK_RUN_FIRST,
 215                     GTK_CLASS_TYPE (object_class),
 216                     GTK_SIGNAL_OFFSET (GtkButtonClass, enter),
 217                     gtk_marshal_VOID__VOID,
 218                     GTK_TYPE_NONE, 0);
 219   button_signals[LEAVE] =
 220     gtk_signal_new ("leave",
 221                     GTK_RUN_FIRST,
 222                     GTK_CLASS_TYPE (object_class),
 223                     GTK_SIGNAL_OFFSET (GtkButtonClass, leave),
 224                     gtk_marshal_VOID__VOID,
 225                     GTK_TYPE_NONE, 0);
 226   button_signals[ACTIVATE] =
 227     gtk_signal_new ("activate",
 228                     GTK_RUN_FIRST,
 229                     GTK_CLASS_TYPE (object_class),
 230                     GTK_SIGNAL_OFFSET (GtkButtonClass, activate),
 231                     gtk_marshal_VOID__VOID,
 232                     GTK_TYPE_NONE, 0);
 233   widget_class->activate_signal = button_signals[ACTIVATE];
 234
 235   gtk_widget_class_install_style_property (widget_class,
 236                                            g_param_spec_int ("default_spacing",
 237                                                              _("Default Spacing"),
 238                                                              _("Extra space to add for CAN_DEFAULT buttons"),
 239                                                              0,
 240                                                              G_MAXINT,
 241                                                              DEFAULT_SPACING,
 242                                                              G_PARAM_READABLE));
 243 }
 244
 245 static void
 246 gtk_button_init (GtkButton *button)
 247 {
 248   GTK_WIDGET_SET_FLAGS (button, GTK_CAN_FOCUS | GTK_RECEIVES_DEFAULT);
 249   GTK_WIDGET_UNSET_FLAGS (button, GTK_NO_WINDOW);
 250
 251   button->child = NULL;
 252   button->in_button = FALSE;
 253   button->button_down = FALSE;
 254   button->relief = GTK_RELIEF_NORMAL;
 255 }
 256
 257 static GtkType
 258 gtk_button_child_type  (GtkContainer     *container)
 259 {
 260   if (!GTK_BIN (container)->child)
 261     return GTK_TYPE_WIDGET;
 262   else
 263     return GTK_TYPE_NONE;
 264 }
 265
 266 static void
 267 gtk_button_set_property (GObject         *object,
 268                          guint            prop_id,
 269                          const GValue    *value,
 270                          GParamSpec      *pspec)
 271 {
 272   GtkButton *button;
 273
 274   button = GTK_BUTTON (object);
 275
 276   switch (prop_id)
 277     {
 278       GtkWidget *child;
 279
 280     case PROP_LABEL:
 281       child = GTK_BIN (button)->child;
 282       if (!child)
 283         child = gtk_widget_new (GTK_TYPE_LABEL,
 284                                 "visible", TRUE,
 285                                 "parent", button,
 286                                 NULL);
 287       if (GTK_IS_LABEL (child))
 288         {
 289           gtk_label_set_text (GTK_LABEL (child),
 290                               g_value_get_string (value) ? g_value_get_string (value) : "");
 291         }
 292       break;
 293     case PROP_RELIEF:
 294       gtk_button_set_relief (button, g_value_get_enum (value));
 295       break;
 296     default:
 297       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 298       break;
 299     }
 300 }
 301
 302 static void
 303 gtk_button_get_property (GObject         *object,
 304                          guint            prop_id,
 305                          GValue          *value,
 306                          GParamSpec      *pspec)
 307 {
 308   GtkButton *button;
 309
 310   button = GTK_BUTTON (object);
 311
 312   switch (prop_id)
 313     {
 314     case PROP_LABEL:
 315       if (GTK_BIN (button)->child && GTK_IS_LABEL (GTK_BIN (button)->child))
 316          g_value_set_string (value, GTK_LABEL (GTK_BIN (button)->child)->label);
 317       else
 318          g_value_set_string (value, NULL);
 319       break;
 320     case PROP_RELIEF:
 321       g_value_set_enum (value, gtk_button_get_relief (button));
 322       break;
 323     default:
 324       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 325       break;
 326     }
 327 }
 328
 329 GtkWidget*
 330 gtk_button_new (void)
 331 {
 332   return GTK_WIDGET (gtk_type_new (gtk_button_get_type ()));
 333 }
 334
 335 GtkWidget*
 336 gtk_button_new_with_label (const gchar *label)
 337 {
 338   GtkWidget *button;
 339   GtkWidget *label_widget;
 340
 341   button = gtk_button_new ();
 342   label_widget = gtk_label_new (label);
 343   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.5, 0.5);
 344
 345   gtk_container_add (GTK_CONTAINER (button), label_widget);
 346   gtk_widget_show (label_widget);
 347
 348   return button;
 349 }
 350
 351 /**
 352  * gtk_button_new_from_stock:
 353  * @stock_id: the name of the stock item
 354  * @returns: a new #GtkButton
 355  *
 356  * Creates a new #GtkButton containing the image and text from a stock item.
 357  * Some stock ids have preprocessor macros like #GTK_STOCK_BUTTON_OK and
 358  * #GTK_STOCK_BUTTON_APPLY.
 359  **/
 360 GtkWidget*
 361 gtk_button_new_from_stock (const gchar   *stock_id)
 362 {
 363   GtkWidget *button;
 364   GtkStockItem item;
 365
 366   if (gtk_stock_lookup (stock_id, &item))
 367     {
 368       GtkWidget *label;
 369       GtkWidget *image;
 370       GtkWidget *hbox;
 371
 372       button = gtk_button_new ();
 373
 374       label = gtk_label_new_with_mnemonic (item.label);
 375
 376       gtk_label_set_mnemonic_widget (GTK_LABEL (label), button);
 377
 378       image = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_BUTTON);
 379       hbox = gtk_hbox_new (FALSE, 0);
 380
 381       gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 2);
 382       gtk_box_pack_end (GTK_BOX (hbox), label, TRUE, TRUE, 2);
 383
 384       gtk_container_add (GTK_CONTAINER (button), hbox);
 385       gtk_widget_show_all (hbox);
 386     }
 387   else
 388     {
 389       button = gtk_button_new_with_mnemonic (stock_id);
 390     }
 391
 392   return button;
 393 }
 394
 395 /**
 396  * gtk_button_new_with_mnemonic:
 397  * @label: The text of the button, with an underscore in front of the
 398  *         mnemonic character
 399  * @returns: a new #GtkButton
 400  *
 401  * Creates a new #GtkButton containing a label.
 402  * If characters in @label are preceded by an underscore, they are underlined
 403  * indicating that they represent a keyboard accelerator called a mnemonic.
 404  * Pressing Alt and that key activates the button.
 405  **/
 406 GtkWidget*
 407 gtk_button_new_with_mnemonic (const gchar *label)
 408 {
 409   GtkWidget *button;
 410   GtkWidget *label_widget;
 411
 412   button = gtk_button_new ();
 413
 414   label_widget = gtk_label_new_with_mnemonic (label);
 415
 416   gtk_label_set_mnemonic_widget (GTK_LABEL (label_widget), button);
 417
 418   gtk_container_add (GTK_CONTAINER (button), label_widget);
 419   gtk_widget_show (label_widget);
 420
 421   return button;
 422 }
 423
 424 void
 425 gtk_button_pressed (GtkButton *button)
 426 {
 427   g_return_if_fail (button != NULL);
 428   g_return_if_fail (GTK_IS_BUTTON (button));
 429
 430   gtk_signal_emit (GTK_OBJECT (button), button_signals[PRESSED]);
 431 }
 432
 433 void
 434 gtk_button_released (GtkButton *button)
 435 {
 436   g_return_if_fail (button != NULL);
 437   g_return_if_fail (GTK_IS_BUTTON (button));
 438
 439   gtk_signal_emit (GTK_OBJECT (button), button_signals[RELEASED]);
 440 }
 441
 442 void
 443 gtk_button_clicked (GtkButton *button)
 444 {
 445   g_return_if_fail (button != NULL);
 446   g_return_if_fail (GTK_IS_BUTTON (button));
 447
 448   gtk_signal_emit (GTK_OBJECT (button), button_signals[CLICKED]);
 449 }
 450
 451 void
 452 gtk_button_enter (GtkButton *button)
 453 {
 454   g_return_if_fail (button != NULL);
 455   g_return_if_fail (GTK_IS_BUTTON (button));
 456
 457   gtk_signal_emit (GTK_OBJECT (button), button_signals[ENTER]);
 458 }
 459
 460 void
 461 gtk_button_leave (GtkButton *button)
 462 {
 463   g_return_if_fail (button != NULL);
 464   g_return_if_fail (GTK_IS_BUTTON (button));
 465
 466   gtk_signal_emit (GTK_OBJECT (button), button_signals[LEAVE]);
 467 }
 468
 469 void
 470 gtk_button_set_relief (GtkButton *button,
 471                        GtkReliefStyle newrelief)
 472 {
 473   g_return_if_fail (button != NULL);
 474   g_return_if_fail (GTK_IS_BUTTON (button));
 475
 476   button->relief = newrelief;
 477   g_object_notify(G_OBJECT(button), "relief");
 478   gtk_widget_queue_draw (GTK_WIDGET (button));
 479 }
 480
 481 GtkReliefStyle
 482 gtk_button_get_relief (GtkButton *button)
 483 {
 484   g_return_val_if_fail (button != NULL, GTK_RELIEF_NORMAL);
 485   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
 486
 487   return button->relief;
 488 }
 489
 490 static void
 491 gtk_button_realize (GtkWidget *widget)
 492 {
 493   GtkButton *button;
 494   GdkWindowAttr attributes;
 495   gint attributes_mask;
 496   gint border_width;
 497
 498   g_return_if_fail (widget != NULL);
 499   g_return_if_fail (GTK_IS_BUTTON (widget));
 500
 501   button = GTK_BUTTON (widget);
 502   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 503
 504   border_width = GTK_CONTAINER (widget)->border_width;
 505
 506   attributes.window_type = GDK_WINDOW_CHILD;
 507   attributes.x = widget->allocation.x + border_width;
 508   attributes.y = widget->allocation.y + border_width;
 509   attributes.width = widget->allocation.width - border_width * 2;
 510   attributes.height = widget->allocation.height - border_width * 2;
 511   attributes.wclass = GDK_INPUT_OUTPUT;
 512   attributes.visual = gtk_widget_get_visual (widget);
 513   attributes.colormap = gtk_widget_get_colormap (widget);
 514   attributes.event_mask = gtk_widget_get_events (widget);
 515   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 516                             GDK_BUTTON_PRESS_MASK |
 517                             GDK_BUTTON_RELEASE_MASK |
 518                             GDK_ENTER_NOTIFY_MASK |
 519                             GDK_LEAVE_NOTIFY_MASK);
 520
 521   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 522
 523   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 524   gdk_window_set_user_data (widget->window, button);
 525
 526   widget->style = gtk_style_attach (widget->style, widget->window);
 527   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 528 }
 529
 530 static void
 531 gtk_button_unrealize (GtkWidget *widget)
 532 {
 533   GtkButton *button = GTK_BUTTON (widget);
 534
 535   if (button->activate_timeout)
 536     gtk_button_finish_activate (button, FALSE);
 537
 538   GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
 539 }
 540
 541 static void
 542 gtk_button_get_props (GtkButton *button,
 543                       gint      *default_spacing,
 544                       gboolean  *interior_focus)
 545 {
 546   GtkWidget *widget =  GTK_WIDGET (button);
 547
 548   if (default_spacing)
 549     gtk_widget_style_get (widget, "default_spacing", default_spacing, NULL);
 550
 551   if (interior_focus)
 552     gtk_widget_style_get (widget, "interior_focus", interior_focus, NULL);
 553 }
 554
 555 static void
 556 gtk_button_size_request (GtkWidget      *widget,
 557                          GtkRequisition *requisition)
 558 {
 559   GtkButton *button = GTK_BUTTON (widget);
 560   gint default_spacing;
 561   gboolean interior_focus;
 562
 563   gtk_button_get_props (button, &default_spacing, &interior_focus);
 564
 565   requisition->width = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
 566                         GTK_WIDGET (widget)->style->xthickness) * 2;
 567   requisition->height = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
 568                          GTK_WIDGET (widget)->style->ythickness) * 2;
 569
 570   if (GTK_WIDGET_CAN_DEFAULT (widget))
 571     {
 572       requisition->width += (GTK_WIDGET (widget)->style->xthickness * 2 +
 573                              default_spacing);
 574       requisition->height += (GTK_WIDGET (widget)->style->ythickness * 2 +
 575                               default_spacing);
 576     }
 577
 578   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 579     {
 580       GtkRequisition child_requisition;
 581
 582       gtk_widget_size_request (GTK_BIN (button)->child, &child_requisition);
 583
 584       requisition->width += child_requisition.width;
 585       requisition->height += child_requisition.height;
 586     }
 587
 588   if (interior_focus)
 589     {
 590       requisition->width += 2;
 591       requisition->height += 2;
 592     }
 593 }
 594
 595 static void
 596 gtk_button_size_allocate (GtkWidget     *widget,
 597                           GtkAllocation *allocation)
 598 {
 599   GtkButton *button = GTK_BUTTON (widget);
 600   GtkAllocation child_allocation;
 601
 602   gint border_width = GTK_CONTAINER (widget)->border_width;
 603   gint xthickness = GTK_WIDGET (widget)->style->xthickness;
 604   gint ythickness = GTK_WIDGET (widget)->style->ythickness;
 605   gint default_spacing;
 606
 607   gtk_button_get_props (button, &default_spacing, NULL);
 608
 609   widget->allocation = *allocation;
 610
 611   if (GTK_WIDGET_REALIZED (widget))
 612     gdk_window_move_resize (widget->window,
 613                             widget->allocation.x + border_width,
 614                             widget->allocation.y + border_width,
 615                             widget->allocation.width - border_width * 2,
 616                             widget->allocation.height - border_width * 2);
 617
 618   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
 619     {
 620       child_allocation.x = (CHILD_SPACING + xthickness);
 621       child_allocation.y = (CHILD_SPACING + ythickness);
 622
 623       child_allocation.width = MAX (1, (gint)widget->allocation.width - child_allocation.x * 2 -
 624                                  border_width * 2);
 625       child_allocation.height = MAX (1, (gint)widget->allocation.height - child_allocation.y * 2 -
 626                                   border_width * 2);
 627
 628       if (GTK_WIDGET_CAN_DEFAULT (button))
 629         {
 630           child_allocation.x += (GTK_WIDGET (widget)->style->xthickness +
 631                                  (1 + default_spacing) / 2);
 632           child_allocation.y += (GTK_WIDGET (widget)->style->ythickness +
 633                                  (1 + default_spacing) / 2);
 634           child_allocation.width =  MAX (1, (gint)child_allocation.width -
 635                                          (gint)(GTK_WIDGET (widget)->style->xthickness * 2 + default_spacing));
 636           child_allocation.height = MAX (1, (gint)child_allocation.height -
 637                                          (gint)(GTK_WIDGET (widget)->style->xthickness * 2 + default_spacing));
 638         }
 639
 640       gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
 641     }
 642 }
 643
 644 /*
 645  * +------------------------------------------------+
 646  * |                   BORDER                       |
 647  * |  +------------------------------------------+  |
 648  * |  |\\\\\\\\\\\\\\\\DEFAULT\\\\\\\\\\\\\\\\\  |  |
 649  * |  |\\+------------------------------------+  |  |
 650  * |  |\\| |           SPACING       3      | |  |  |
 651  * |  |\\| +--------------------------------+ |  |  |
 652  * |  |\\| |########## FOCUS ###############| |  |  |
 653  * |  |\\| |#+----------------------------+#| |  |  |
 654  * |  |\\| |#|         RELIEF            \|#| |  |  |
 655  * |  |\\| |#|  +-----------------------+\|#| |  |  |
 656  * |  |\\|1|#|  +     THE TEXT          +\|#|2|  |  |
 657  * |  |\\| |#|  +-----------------------+\|#| |  |  |
 658  * |  |\\| |#| \\\\\ ythickness \\\\\\\\\\|#| |  |  |
 659  * |  |\\| |#+----------------------------+#| |  |  |
 660  * |  |\\| |########### 1 ##################| |  |  |
 661  * |  |\\| +--------------------------------+ |  |  |
 662  * |  |\\| |        default spacing   4     | |  |  |
 663  * |  |\\+------------------------------------+  |  |
 664  * |  |\            ythickness                   |  |
 665  * |  +------------------------------------------+  |
 666  * |                border_width                    |
 667  * +------------------------------------------------+
 668  */
 669
 670 static void
 671 gtk_button_paint (GtkWidget    *widget,
 672                   GdkRectangle *area)
 673 {
 674   GtkButton *button;
 675   GtkShadowType shadow_type;
 676   gint width, height;
 677   gint x, y;
 678   gint default_spacing;
 679   gboolean interior_focus;
 680
 681   if (GTK_WIDGET_DRAWABLE (widget))
 682     {
 683       button = GTK_BUTTON (widget);
 684
 685       gtk_button_get_props (button, &default_spacing, &interior_focus);
 686
 687       x = 0;
 688       y = 0;
 689       width = widget->allocation.width - GTK_CONTAINER (widget)->border_width * 2;
 690       height = widget->allocation.height - GTK_CONTAINER (widget)->border_width * 2;
 691
 692       gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 693       gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 694
 695       if (GTK_WIDGET_HAS_DEFAULT (widget) &&
 696           GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
 697         {
 698           gtk_paint_box (widget->style, widget->window,
 699                          GTK_STATE_NORMAL, GTK_SHADOW_IN,
 700                          area, widget, "buttondefault",
 701                          x, y, width, height);
 702         }
 703
 704       if (GTK_WIDGET_CAN_DEFAULT (widget))
 705         {
 706           x += widget->style->xthickness;
 707           y += widget->style->ythickness;
 708           width -= 2 * x + default_spacing;
 709           height -= 2 * y + default_spacing;
 710           x += (1 + default_spacing) / 2;
 711           y += (1 + default_spacing) / 2;
 712         }
 713
 714       if (!interior_focus && GTK_WIDGET_HAS_FOCUS (widget))
 715         {
 716           x += 1;
 717           y += 1;
 718           width -= 2;
 719           height -= 2;
 720         }
 721
 722       if (GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE)
 723         shadow_type = GTK_SHADOW_IN;
 724       else
 725         shadow_type = GTK_SHADOW_OUT;
 726
 727       if ((button->relief != GTK_RELIEF_NONE) ||
 728           ((GTK_WIDGET_STATE(widget) != GTK_STATE_NORMAL) &&
 729            (GTK_WIDGET_STATE(widget) != GTK_STATE_INSENSITIVE)))
 730         gtk_paint_box (widget->style, widget->window,
 731                        GTK_WIDGET_STATE (widget),
 732                        shadow_type, area, widget, "button",
 733                        x, y, width, height);
 734
 735       if (GTK_WIDGET_HAS_FOCUS (widget))
 736         {
 737           if (interior_focus)
 738             {
 739               x += widget->style->xthickness + 1;
 740               y += widget->style->ythickness + 1;
 741               width -= 2 * (widget->style->xthickness + 1);
 742               height -=  2 * (widget->style->xthickness + 1);
 743             }
 744           else
 745             {
 746               x -= 1;
 747               y -= 1;
 748               width += 2;
 749               height += 2;
 750             }
 751
 752           gtk_paint_focus (widget->style, widget->window,
 753                            area, widget, "button",
 754                            x, y, width - 1, height - 1);
 755         }
 756     }
 757 }
 758
 759 static gboolean
 760 gtk_button_expose (GtkWidget      *widget,
 761                    GdkEventExpose *event)
 762 {
 763   GtkBin *bin;
 764
 765   g_return_val_if_fail (widget != NULL, FALSE);
 766   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 767   g_return_val_if_fail (event != NULL, FALSE);
 768
 769   if (GTK_WIDGET_DRAWABLE (widget))
 770     {
 771       bin = GTK_BIN (widget);
 772
 773       gtk_button_paint (widget, &event->area);
 774
 775       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 776     }
 777
 778   return FALSE;
 779 }
 780
 781 static gboolean
 782 gtk_button_button_press (GtkWidget      *widget,
 783                          GdkEventButton *event)
 784 {
 785   GtkButton *button;
 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   if (event->type == GDK_BUTTON_PRESS)
 792     {
 793       button = GTK_BUTTON (widget);
 794
 795       if (!GTK_WIDGET_HAS_FOCUS (widget))
 796         gtk_widget_grab_focus (widget);
 797
 798       if (event->button == 1)
 799         gtk_button_pressed (button);
 800     }
 801
 802   return TRUE;
 803 }
 804
 805 static gboolean
 806 gtk_button_button_release (GtkWidget      *widget,
 807                            GdkEventButton *event)
 808 {
 809   GtkButton *button;
 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   if (event->button == 1)
 816     {
 817       button = GTK_BUTTON (widget);
 818       gtk_button_released (button);
 819     }
 820
 821   return TRUE;
 822 }
 823
 824 static gboolean
 825 gtk_button_key_release (GtkWidget   *widget,
 826                         GdkEventKey *event)
 827 {
 828   GtkButton *button = GTK_BUTTON (widget);
 829
 830   if (button->activate_timeout)
 831     {
 832       gtk_button_finish_activate (button, TRUE);
 833       return TRUE;
 834     }
 835   else if (GTK_WIDGET_CLASS (parent_class)->key_release_event)
 836     return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
 837   else
 838     return FALSE;
 839 }
 840
 841 static gboolean
 842 gtk_button_enter_notify (GtkWidget        *widget,
 843                          GdkEventCrossing *event)
 844 {
 845   GtkButton *button;
 846   GtkWidget *event_widget;
 847
 848   g_return_val_if_fail (widget != NULL, FALSE);
 849   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 850   g_return_val_if_fail (event != NULL, FALSE);
 851
 852   button = GTK_BUTTON (widget);
 853   event_widget = gtk_get_event_widget ((GdkEvent*) event);
 854
 855   if ((event_widget == widget) &&
 856       (event->detail != GDK_NOTIFY_INFERIOR))
 857     {
 858       button->in_button = TRUE;
 859       gtk_button_enter (button);
 860     }
 861
 862   return FALSE;
 863 }
 864
 865 static gboolean
 866 gtk_button_leave_notify (GtkWidget        *widget,
 867                          GdkEventCrossing *event)
 868 {
 869   GtkButton *button;
 870   GtkWidget *event_widget;
 871
 872   g_return_val_if_fail (widget != NULL, FALSE);
 873   g_return_val_if_fail (GTK_IS_BUTTON (widget), FALSE);
 874   g_return_val_if_fail (event != NULL, FALSE);
 875
 876   button = GTK_BUTTON (widget);
 877   event_widget = gtk_get_event_widget ((GdkEvent*) event);
 878
 879   if ((event_widget == widget) &&
 880       (event->detail != GDK_NOTIFY_INFERIOR))
 881     {
 882       button->in_button = FALSE;
 883       gtk_button_leave (button);
 884     }
 885
 886   return FALSE;
 887 }
 888
 889 static void
 890 gtk_button_add (GtkContainer *container,
 891                 GtkWidget    *widget)
 892 {
 893   g_return_if_fail (container != NULL);
 894   g_return_if_fail (widget != NULL);
 895
 896   if (GTK_CONTAINER_CLASS (parent_class)->add)
 897     GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
 898
 899   GTK_BUTTON (container)->child = GTK_BIN (container)->child;
 900 }
 901
 902 static void
 903 gtk_button_remove (GtkContainer *container,
 904                    GtkWidget    *widget)
 905 {
 906   g_return_if_fail (container != NULL);
 907   g_return_if_fail (widget != NULL);
 908
 909   if (GTK_CONTAINER_CLASS (parent_class)->remove)
 910     GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
 911
 912   GTK_BUTTON (container)->child = GTK_BIN (container)->child;
 913 }
 914
 915 static void
 916 gtk_real_button_pressed (GtkButton *button)
 917 {
 918   GtkStateType new_state;
 919
 920   g_return_if_fail (button != NULL);
 921   g_return_if_fail (GTK_IS_BUTTON (button));
 922
 923   if (button->activate_timeout)
 924     return;
 925
 926   button->button_down = TRUE;
 927
 928   new_state = (button->in_button ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL);
 929
 930   if (GTK_WIDGET_STATE (button) != new_state)
 931     {
 932       gtk_widget_set_state (GTK_WIDGET (button), new_state);
 933       gtk_widget_queue_draw (GTK_WIDGET (button));
 934     }
 935 }
 936
 937 static void
 938 gtk_real_button_released (GtkButton *button)
 939 {
 940   GtkStateType new_state;
 941
 942   g_return_if_fail (button != NULL);
 943   g_return_if_fail (GTK_IS_BUTTON (button));
 944
 945   if (button->button_down)
 946     {
 947       button->button_down = FALSE;
 948
 949       if (button->activate_timeout)
 950         return;
 951
 952       if (button->in_button)
 953         gtk_button_clicked (button);
 954
 955       new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
 956
 957       if (GTK_WIDGET_STATE (button) != new_state)
 958         {
 959           gtk_widget_set_state (GTK_WIDGET (button), new_state);
 960           /* We _draw () instead of queue_draw so that if the operation
 961            * blocks, the label doesn't vanish.
 962            */
 963           gtk_widget_draw (GTK_WIDGET (button), NULL);
 964         }
 965     }
 966 }
 967
 968 static void
 969 gtk_real_button_enter (GtkButton *button)
 970 {
 971   GtkStateType new_state;
 972
 973   g_return_if_fail (button != NULL);
 974   g_return_if_fail (GTK_IS_BUTTON (button));
 975
 976   new_state = (button->button_down ? GTK_STATE_ACTIVE : GTK_STATE_PRELIGHT);
 977
 978   if (button->activate_timeout)
 979     return;
 980
 981   if (GTK_WIDGET_STATE (button) != new_state)
 982     {
 983       gtk_widget_set_state (GTK_WIDGET (button), new_state);
 984       gtk_widget_queue_draw (GTK_WIDGET (button));
 985     }
 986 }
 987
 988 static void
 989 gtk_real_button_leave (GtkButton *button)
 990 {
 991   g_return_if_fail (button != NULL);
 992   g_return_if_fail (GTK_IS_BUTTON (button));
 993
 994   if (button->activate_timeout)
 995     return;
 996
 997   if (GTK_WIDGET_STATE (button) != GTK_STATE_NORMAL)
 998     {
 999       gtk_widget_set_state (GTK_WIDGET (button), GTK_STATE_NORMAL);
1000       gtk_widget_queue_draw (GTK_WIDGET (button));
1001     }
1002 }
1003
1004 static gboolean
1005 button_activate_timeout (gpointer data)
1006 {
1007   gtk_button_finish_activate (data, TRUE);
1008
1009   return FALSE;
1010 }
1011
1012 static void
1013 gtk_real_button_activate (GtkButton *button)
1014 {
1015   GtkWidget *widget = GTK_WIDGET (button);
1016
1017   g_return_if_fail (button != NULL);
1018   g_return_if_fail (GTK_IS_BUTTON (button));
1019
1020   if (GTK_WIDGET_REALIZED (button) && !button->activate_timeout)
1021     {
1022       if (gdk_keyboard_grab (widget->window, TRUE,
1023                              gtk_get_current_event_time ()) == 0)
1024         {
1025           gtk_grab_add (widget);
1026
1027           button->activate_timeout = g_timeout_add (ACTIVATE_TIMEOUT,
1028                                                     button_activate_timeout,
1029                                                     button);
1030           button->button_down = TRUE;
1031           gtk_widget_set_state (widget, GTK_STATE_ACTIVE);
1032         }
1033     }
1034 }
1035
1036 static void
1037 gtk_button_finish_activate (GtkButton *button,
1038                             gboolean   do_it)
1039 {
1040   GtkWidget *widget = GTK_WIDGET (button);
1041
1042   g_source_remove (button->activate_timeout);
1043   button->activate_timeout = 0;
1044
1045   gdk_keyboard_ungrab (gtk_get_current_event_time ());
1046   gtk_grab_remove (widget);
1047
1048   button->button_down = FALSE;
1049   gtk_widget_set_state (GTK_WIDGET (button),
1050                         button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);
1051
1052   if (do_it)
1053     gtk_button_clicked (button);
1054 }
1055