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 "config.h"
  28 #include <string.h>
  29 #include "gtkalignment.h"
  30 #include "gtkbutton.h"
  31 #include "gtklabel.h"
  32 #include "gtkmain.h"
  33 #include "gtkmarshalers.h"
  34 #include "gtkimage.h"
  35 #include "gtkhbox.h"
  36 #include "gtkvbox.h"
  37 #include "gtkstock.h"
  38 #include "gtkiconfactory.h"
  39 #include "gtkprivate.h"
  40 #include "gtkintl.h"
  41 #include "gtkalias.h"
  42
  43 static const GtkBorder default_default_border = { 1, 1, 1, 1 };
  44 static const GtkBorder default_default_outside_border = { 0, 0, 0, 0 };
  45 static const GtkBorder default_inner_border = { 1, 1, 1, 1 };
  46
  47 /* Time out before giving up on getting a key release when animating
  48  * the close button.
  49  */
  50 #define ACTIVATE_TIMEOUT 250
  51
  52 enum {
  53   PRESSED,
  54   RELEASED,
  55   CLICKED,
  56   ENTER,
  57   LEAVE,
  58   ACTIVATE,
  59   LAST_SIGNAL
  60 };
  61
  62 enum {
  63   PROP_0,
  64   PROP_LABEL,
  65   PROP_IMAGE,
  66   PROP_RELIEF,
  67   PROP_USE_UNDERLINE,
  68   PROP_USE_STOCK,
  69   PROP_FOCUS_ON_CLICK,
  70   PROP_XALIGN,
  71   PROP_YALIGN,
  72   PROP_IMAGE_POSITION
  73 };
  74
  75 #define GTK_BUTTON_GET_PRIVATE(o)       (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_BUTTON, GtkButtonPrivate))
  76 typedef struct _GtkButtonPrivate GtkButtonPrivate;
  77
  78 struct _GtkButtonPrivate
  79 {
  80   gfloat          xalign;
  81   gfloat          yalign;
  82   GtkWidget      *image;
  83   guint           align_set      : 1;
  84   guint           image_is_stock : 1;
  85   guint           has_grab       : 1;
  86   guint32         grab_time;
  87   GtkPositionType image_position;
  88 };
  89
  90 static void gtk_button_destroy        (GtkObject          *object);
  91 static void gtk_button_set_property   (GObject            *object,
  92                                        guint               prop_id,
  93                                        const GValue       *value,
  94                                        GParamSpec         *pspec);
  95 static void gtk_button_get_property   (GObject            *object,
  96                                        guint               prop_id,
  97                                        GValue             *value,
  98                                        GParamSpec         *pspec);
  99 static void gtk_button_screen_changed (GtkWidget          *widget,
 100                                        GdkScreen          *previous_screen);
 101 static void gtk_button_realize        (GtkWidget          *widget);
 102 static void gtk_button_unrealize      (GtkWidget          *widget);
 103 static void gtk_button_map            (GtkWidget          *widget);
 104 static void gtk_button_unmap          (GtkWidget          *widget);
 105 static void gtk_button_style_set      (GtkWidget          *widget,
 106                                        GtkStyle           *prev_style);
 107 static void gtk_button_size_request   (GtkWidget          *widget,
 108                                        GtkRequisition     *requisition);
 109 static void gtk_button_size_allocate  (GtkWidget          *widget,
 110                                        GtkAllocation      *allocation);
 111 static gint gtk_button_expose         (GtkWidget          *widget,
 112                                        GdkEventExpose     *event);
 113 static gint gtk_button_button_press   (GtkWidget          *widget,
 114                                        GdkEventButton     *event);
 115 static gint gtk_button_button_release (GtkWidget          *widget,
 116                                        GdkEventButton     *event);
 117 static gint gtk_button_grab_broken    (GtkWidget          *widget,
 118                                        GdkEventGrabBroken *event);
 119 static gint gtk_button_key_release    (GtkWidget          *widget,
 120                                        GdkEventKey        *event);
 121 static gint gtk_button_enter_notify   (GtkWidget          *widget,
 122                                        GdkEventCrossing   *event);
 123 static gint gtk_button_leave_notify   (GtkWidget          *widget,
 124                                        GdkEventCrossing   *event);
 125 static void gtk_real_button_pressed   (GtkButton          *button);
 126 static void gtk_real_button_released  (GtkButton          *button);
 127 static void gtk_real_button_activate  (GtkButton          *button);
 128 static void gtk_button_update_state   (GtkButton          *button);
 129 static void gtk_button_add            (GtkContainer       *container,
 130                                        GtkWidget          *widget);
 131 static GType gtk_button_child_type    (GtkContainer       *container);
 132 static void gtk_button_finish_activate (GtkButton         *button,
 133                                         gboolean           do_it);
 134
 135 static GObject* gtk_button_constructor (GType                  type,
 136                                         guint                  n_construct_properties,
 137                                         GObjectConstructParam *construct_params);
 138 static void gtk_button_construct_child (GtkButton             *button);
 139 static void gtk_button_state_changed   (GtkWidget             *widget,
 140                                         GtkStateType           previous_state);
 141 static void gtk_button_grab_notify     (GtkWidget             *widget,
 142                                         gboolean               was_grabbed);
 143
 144
 145 static guint button_signals[LAST_SIGNAL] = { 0 };
 146
 147 G_DEFINE_TYPE (GtkButton, gtk_button, GTK_TYPE_BIN)
 148
 149 static void
 150 gtk_button_class_init (GtkButtonClass *klass)
 151 {
 152   GObjectClass *gobject_class;
 153   GtkObjectClass *object_class;
 154   GtkWidgetClass *widget_class;
 155   GtkContainerClass *container_class;
 156
 157   gobject_class = G_OBJECT_CLASS (klass);
 158   object_class = (GtkObjectClass*) klass;
 159   widget_class = (GtkWidgetClass*) klass;
 160   container_class = (GtkContainerClass*) klass;
 161
 162   gobject_class->constructor = gtk_button_constructor;
 163   gobject_class->set_property = gtk_button_set_property;
 164   gobject_class->get_property = gtk_button_get_property;
 165
 166   object_class->destroy = gtk_button_destroy;
 167
 168   widget_class->screen_changed = gtk_button_screen_changed;
 169   widget_class->realize = gtk_button_realize;
 170   widget_class->unrealize = gtk_button_unrealize;
 171   widget_class->map = gtk_button_map;
 172   widget_class->unmap = gtk_button_unmap;
 173   widget_class->style_set = gtk_button_style_set;
 174   widget_class->size_request = gtk_button_size_request;
 175   widget_class->size_allocate = gtk_button_size_allocate;
 176   widget_class->expose_event = gtk_button_expose;
 177   widget_class->button_press_event = gtk_button_button_press;
 178   widget_class->button_release_event = gtk_button_button_release;
 179   widget_class->grab_broken_event = gtk_button_grab_broken;
 180   widget_class->key_release_event = gtk_button_key_release;
 181   widget_class->enter_notify_event = gtk_button_enter_notify;
 182   widget_class->leave_notify_event = gtk_button_leave_notify;
 183   widget_class->state_changed = gtk_button_state_changed;
 184   widget_class->grab_notify = gtk_button_grab_notify;
 185
 186   container_class->child_type = gtk_button_child_type;
 187   container_class->add = gtk_button_add;
 188
 189   klass->pressed = gtk_real_button_pressed;
 190   klass->released = gtk_real_button_released;
 191   klass->clicked = NULL;
 192   klass->enter = gtk_button_update_state;
 193   klass->leave = gtk_button_update_state;
 194   klass->activate = gtk_real_button_activate;
 195
 196   g_object_class_install_property (gobject_class,
 197                                    PROP_LABEL,
 198                                    g_param_spec_string ("label",
 199                                                         P_("Label"),
 200                                                         P_("Text of the label widget inside the button, if the button contains a label widget"),
 201                                                         NULL,
 202                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 203
 204   g_object_class_install_property (gobject_class,
 205                                    PROP_USE_UNDERLINE,
 206                                    g_param_spec_boolean ("use-underline",
 207                                                          P_("Use underline"),
 208                                                          P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
 209                                                         FALSE,
 210                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 211
 212   g_object_class_install_property (gobject_class,
 213                                    PROP_USE_STOCK,
 214                                    g_param_spec_boolean ("use-stock",
 215                                                          P_("Use stock"),
 216                                                          P_("If set, the label is used to pick a stock item instead of being displayed"),
 217                                                         FALSE,
 218                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 219
 220   g_object_class_install_property (gobject_class,
 221                                    PROP_FOCUS_ON_CLICK,
 222                                    g_param_spec_boolean ("focus-on-click",
 223                                                          P_("Focus on click"),
 224                                                          P_("Whether the button grabs focus when it is clicked with the mouse"),
 225                                                          TRUE,
 226                                                          GTK_PARAM_READWRITE));
 227
 228   g_object_class_install_property (gobject_class,
 229                                    PROP_RELIEF,
 230                                    g_param_spec_enum ("relief",
 231                                                       P_("Border relief"),
 232                                                       P_("The border relief style"),
 233                                                       GTK_TYPE_RELIEF_STYLE,
 234                                                       GTK_RELIEF_NORMAL,
 235                                                       GTK_PARAM_READWRITE));
 236
 237   /**
 238    * GtkButton:xalign:
 239    *
 240    * If the child of the button is a #GtkMisc or #GtkAlignment, this property
 241    * can be used to control it's horizontal alignment. 0.0 is left aligned,
 242    * 1.0 is right aligned.
 243    *
 244    * Since: 2.4
 245    */
 246   g_object_class_install_property (gobject_class,
 247                                    PROP_XALIGN,
 248                                    g_param_spec_float("xalign",
 249                                                       P_("Horizontal alignment for child"),
 250                                                       P_("Horizontal position of child in available space. 0.0 is left aligned, 1.0 is right aligned"),
 251                                                       0.0,
 252                                                       1.0,
 253                                                       0.5,
 254                                                       GTK_PARAM_READWRITE));
 255
 256   /**
 257    * GtkButton:yalign:
 258    *
 259    * If the child of the button is a #GtkMisc or #GtkAlignment, this property
 260    * can be used to control it's vertical alignment. 0.0 is top aligned,
 261    * 1.0 is bottom aligned.
 262    *
 263    * Since: 2.4
 264    */
 265   g_object_class_install_property (gobject_class,
 266                                    PROP_YALIGN,
 267                                    g_param_spec_float("yalign",
 268                                                       P_("Vertical alignment for child"),
 269                                                       P_("Vertical position of child in available space. 0.0 is top aligned, 1.0 is bottom aligned"),
 270                                                       0.0,
 271                                                       1.0,
 272                                                       0.5,
 273                                                       GTK_PARAM_READWRITE));
 274
 275   /**
 276    * GtkButton::image:
 277    *
 278    * The child widget to appear next to the button text.
 279    *
 280    * Since: 2.6
 281    */
 282   g_object_class_install_property (gobject_class,
 283                                    PROP_IMAGE,
 284                                    g_param_spec_object ("image",
 285                                                         P_("Image widget"),
 286                                                         P_("Child widget to appear next to the button text"),
 287                                                         GTK_TYPE_WIDGET,
 288                                                         GTK_PARAM_READWRITE));
 289
 290   /**
 291    * GtkButton:image-position:
 292    *
 293    * The position of the image relative to the text inside the button.
 294    *
 295    * Since: 2.10
 296    */
 297   g_object_class_install_property (gobject_class,
 298                                    PROP_IMAGE_POSITION,
 299                                    g_param_spec_enum ("image-position",
 300                                             P_("Image position"),
 301                                                       P_("The position of the image relative to the text"),
 302                                                       GTK_TYPE_POSITION_TYPE,
 303                                                       GTK_POS_LEFT,
 304                                                       GTK_PARAM_READWRITE));
 305
 306   /**
 307    * GtkButton::pressed:
 308    * @button: the object that received the signal
 309    *
 310    * Emitted when the button is pressed.
 311    *
 312    * Deprecated: 2.8: Use the #GtkWidget::button-press-event signal.
 313    */
 314   button_signals[PRESSED] =
 315     g_signal_new (I_("pressed"),
 316                   G_OBJECT_CLASS_TYPE (object_class),
 317                   G_SIGNAL_RUN_FIRST,
 318                   G_STRUCT_OFFSET (GtkButtonClass, pressed),
 319                   NULL, NULL,
 320                   _gtk_marshal_VOID__VOID,
 321                   G_TYPE_NONE, 0);
 322
 323   /**
 324    * GtkButton::released:
 325    * @button: the object that received the signal
 326    *
 327    * Emitted when the button is released.
 328    *
 329    * Deprecated: 2.8: Use the #GtkWidget::button-release-event signal.
 330    */
 331   button_signals[RELEASED] =
 332     g_signal_new (I_("released"),
 333                   G_OBJECT_CLASS_TYPE (object_class),
 334                   G_SIGNAL_RUN_FIRST,
 335                   G_STRUCT_OFFSET (GtkButtonClass, released),
 336                   NULL, NULL,
 337                   _gtk_marshal_VOID__VOID,
 338                   G_TYPE_NONE, 0);
 339
 340   /**
 341    * GtkButton::clicked:
 342    * @button: the object that received the signal
 343    *
 344    * Emitted when the button has been activated (pressed and released).
 345    */
 346   button_signals[CLICKED] =
 347     g_signal_new (I_("clicked"),
 348                   G_OBJECT_CLASS_TYPE (object_class),
 349                   G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
 350                   G_STRUCT_OFFSET (GtkButtonClass, clicked),
 351                   NULL, NULL,
 352                   _gtk_marshal_VOID__VOID,
 353                   G_TYPE_NONE, 0);
 354
 355   /**
 356    * GtkButton::enter:
 357    * @button: the object that received the signal
 358    *
 359    * Emitted when the pointer enters the button.
 360    *
 361    * Deprecated: 2.8: Use the #GtkWidget::enter-notify-event signal.
 362    */
 363   button_signals[ENTER] =
 364     g_signal_new (I_("enter"),
 365                   G_OBJECT_CLASS_TYPE (object_class),
 366                   G_SIGNAL_RUN_FIRST,
 367                   G_STRUCT_OFFSET (GtkButtonClass, enter),
 368                   NULL, NULL,
 369                   _gtk_marshal_VOID__VOID,
 370                   G_TYPE_NONE, 0);
 371
 372   /**
 373    * GtkButton::leave:
 374    * @button: the object that received the signal
 375    *
 376    * Emitted when the pointer leaves the button.
 377    *
 378    * Deprecated: 2.8: Use the #GtkWidget::leave-notify-event signal.
 379    */
 380   button_signals[LEAVE] =
 381     g_signal_new (I_("leave"),
 382                   G_OBJECT_CLASS_TYPE (object_class),
 383                   G_SIGNAL_RUN_FIRST,
 384                   G_STRUCT_OFFSET (GtkButtonClass, leave),
 385                   NULL, NULL,
 386                   _gtk_marshal_VOID__VOID,
 387                   G_TYPE_NONE, 0);
 388
 389   /**
 390    * GtkButton::activate:
 391    * @widget: the object which received the signal.
 392    *
 393    * The ::activate signal on GtkButton is an action signal and
 394    * emitting it causes the button to animate press then release.
 395    * Applications should never connect to this signal, but use the
 396    * #GtkButton::clicked signal.
 397    */
 398   button_signals[ACTIVATE] =
 399     g_signal_new (I_("activate"),
 400                   G_OBJECT_CLASS_TYPE (object_class),
 401                   G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
 402                   G_STRUCT_OFFSET (GtkButtonClass, activate),
 403                   NULL, NULL,
 404                   _gtk_marshal_VOID__VOID,
 405                   G_TYPE_NONE, 0);
 406   widget_class->activate_signal = button_signals[ACTIVATE];
 407
 408   gtk_widget_class_install_style_property (widget_class,
 409                                            g_param_spec_boxed ("default-border",
 410                                                                P_("Default Spacing"),
 411                                                                P_("Extra space to add for CAN_DEFAULT buttons"),
 412                                                                GTK_TYPE_BORDER,
 413                                                                GTK_PARAM_READABLE));
 414
 415   gtk_widget_class_install_style_property (widget_class,
 416                                            g_param_spec_boxed ("default-outside-border",
 417                                                                P_("Default Outside Spacing"),
 418                                                                P_("Extra space to add for CAN_DEFAULT buttons that is always drawn outside the border"),
 419                                                                GTK_TYPE_BORDER,
 420                                                                GTK_PARAM_READABLE));
 421   gtk_widget_class_install_style_property (widget_class,
 422                                            g_param_spec_int ("child-displacement-x",
 423                                                              P_("Child X Displacement"),
 424                                                              P_("How far in the x direction to move the child when the button is depressed"),
 425                                                              G_MININT,
 426                                                              G_MAXINT,
 427                                                              0,
 428                                                              GTK_PARAM_READABLE));
 429   gtk_widget_class_install_style_property (widget_class,
 430                                            g_param_spec_int ("child-displacement-y",
 431                                                              P_("Child Y Displacement"),
 432                                                              P_("How far in the y direction to move the child when the button is depressed"),
 433                                                              G_MININT,
 434                                                              G_MAXINT,
 435                                                              0,
 436                                                              GTK_PARAM_READABLE));
 437
 438   /**
 439    * GtkButton:displace-focus:
 440    *
 441    * Whether the child_displacement_x/child_displacement_y properties
 442    * should also affect the focus rectangle.
 443    *
 444    * Since: 2.6
 445    */
 446   gtk_widget_class_install_style_property (widget_class,
 447                                            g_param_spec_boolean ("displace-focus",
 448                                                                  P_("Displace focus"),
 449                                                                  P_("Whether the child_displacement_x/_y properties should also affect the focus rectangle"),
 450                                                                  FALSE,
 451                                                                  GTK_PARAM_READABLE));
 452
 453   /**
 454    * GtkButton:inner-border:
 455    *
 456    * Sets the border between the button edges and child.
 457    *
 458    * Since: 2.10
 459    */
 460   gtk_widget_class_install_style_property (widget_class,
 461                                            g_param_spec_boxed ("inner-border",
 462                                                                P_("Inner Border"),
 463                                                                P_("Border between button edges and child."),
 464                                                                GTK_TYPE_BORDER,
 465                                                                GTK_PARAM_READABLE));
 466
 467   /**
 468    * GtkButton::image-spacing:
 469    *
 470    * Spacing in pixels between the image and label.
 471    *
 472    * Since: 2.10
 473    */
 474   gtk_widget_class_install_style_property (widget_class,
 475                                            g_param_spec_int ("image-spacing",
 476                                                              P_("Image spacing"),
 477                                                              P_("Spacing in pixels between the image and label"),
 478                                                              0,
 479                                                              G_MAXINT,
 480                                                              2,
 481                                                              GTK_PARAM_READABLE));
 482
 483   /**
 484    * GtkButton::gtk-button-images:
 485    *
 486    * If stock icon in buttons should be shown at all.
 487    *
 488    * Since: 2.4
 489    */
 490   gtk_settings_install_property (g_param_spec_boolean ("gtk-button-images",
 491                                                        P_("Show button images"),
 492                                                        P_("Whether stock icons should be shown in buttons"),
 493                                                        TRUE,
 494                                                        GTK_PARAM_READWRITE));
 495
 496   g_type_class_add_private (gobject_class, sizeof (GtkButtonPrivate));
 497 }
 498
 499 static void
 500 gtk_button_init (GtkButton *button)
 501 {
 502   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 503
 504   GTK_WIDGET_SET_FLAGS (button, GTK_CAN_FOCUS | GTK_RECEIVES_DEFAULT);
 505   GTK_WIDGET_SET_FLAGS (button, GTK_NO_WINDOW);
 506
 507   button->label_text = NULL;
 508
 509   button->constructed = FALSE;
 510   button->in_button = FALSE;
 511   button->button_down = FALSE;
 512   button->relief = GTK_RELIEF_NORMAL;
 513   button->use_stock = FALSE;
 514   button->use_underline = FALSE;
 515   button->depressed = FALSE;
 516   button->depress_on_activate = TRUE;
 517   button->focus_on_click = TRUE;
 518
 519   priv->xalign = 0.5;
 520   priv->yalign = 0.5;
 521   priv->align_set = 0;
 522   priv->image_is_stock = TRUE;
 523   priv->image_position = GTK_POS_LEFT;
 524 }
 525
 526 static void
 527 gtk_button_destroy (GtkObject *object)
 528 {
 529   GtkButton *button = GTK_BUTTON (object);
 530
 531   if (button->label_text)
 532     {
 533       g_free (button->label_text);
 534       button->label_text = NULL;
 535     }
 536
 537   (* GTK_OBJECT_CLASS (gtk_button_parent_class)->destroy) (object);
 538 }
 539
 540 static GObject*
 541 gtk_button_constructor (GType                  type,
 542                         guint                  n_construct_properties,
 543                         GObjectConstructParam *construct_params)
 544 {
 545   GObject *object;
 546   GtkButton *button;
 547
 548   object = (* G_OBJECT_CLASS (gtk_button_parent_class)->constructor) (type,
 549                                                                       n_construct_properties,
 550                                                                       construct_params);
 551
 552   button = GTK_BUTTON (object);
 553   button->constructed = TRUE;
 554
 555   if (button->label_text != NULL)
 556     gtk_button_construct_child (button);
 557
 558   return object;
 559 }
 560
 561
 562 static GType
 563 gtk_button_child_type  (GtkContainer     *container)
 564 {
 565   if (!GTK_BIN (container)->child)
 566     return GTK_TYPE_WIDGET;
 567   else
 568     return G_TYPE_NONE;
 569 }
 570
 571 static void
 572 maybe_set_alignment (GtkButton *button,
 573                      GtkWidget *widget)
 574 {
 575   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 576
 577   if (GTK_IS_MISC (widget))
 578     {
 579       GtkMisc *misc = GTK_MISC (widget);
 580
 581       if (priv->align_set)
 582         gtk_misc_set_alignment (misc, priv->xalign, priv->yalign);
 583     }
 584   else if (GTK_IS_ALIGNMENT (widget))
 585     {
 586       GtkAlignment *alignment = GTK_ALIGNMENT (widget);
 587
 588       if (priv->align_set)
 589         gtk_alignment_set (alignment, priv->xalign, priv->yalign,
 590                            alignment->xscale, alignment->yscale);
 591     }
 592 }
 593
 594 static void
 595 gtk_button_add (GtkContainer *container,
 596                 GtkWidget    *widget)
 597 {
 598   maybe_set_alignment (GTK_BUTTON (container), widget);
 599
 600   GTK_CONTAINER_CLASS (gtk_button_parent_class)->add (container, widget);
 601 }
 602
 603 static void
 604 gtk_button_set_property (GObject         *object,
 605                          guint            prop_id,
 606                          const GValue    *value,
 607                          GParamSpec      *pspec)
 608 {
 609   GtkButton *button = GTK_BUTTON (object);
 610   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 611
 612   switch (prop_id)
 613     {
 614     case PROP_LABEL:
 615       gtk_button_set_label (button, g_value_get_string (value));
 616       break;
 617     case PROP_IMAGE:
 618       gtk_button_set_image (button, (GtkWidget *) g_value_get_object (value));
 619       break;
 620     case PROP_RELIEF:
 621       gtk_button_set_relief (button, g_value_get_enum (value));
 622       break;
 623     case PROP_USE_UNDERLINE:
 624       gtk_button_set_use_underline (button, g_value_get_boolean (value));
 625       break;
 626     case PROP_USE_STOCK:
 627       gtk_button_set_use_stock (button, g_value_get_boolean (value));
 628       break;
 629     case PROP_FOCUS_ON_CLICK:
 630       gtk_button_set_focus_on_click (button, g_value_get_boolean (value));
 631       break;
 632     case PROP_XALIGN:
 633       gtk_button_set_alignment (button, g_value_get_float (value), priv->yalign);
 634       break;
 635     case PROP_YALIGN:
 636       gtk_button_set_alignment (button, priv->xalign, g_value_get_float (value));
 637       break;
 638     case PROP_IMAGE_POSITION:
 639       gtk_button_set_image_position (button, g_value_get_enum (value));
 640       break;
 641     default:
 642       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 643       break;
 644     }
 645 }
 646
 647 static void
 648 gtk_button_get_property (GObject         *object,
 649                          guint            prop_id,
 650                          GValue          *value,
 651                          GParamSpec      *pspec)
 652 {
 653   GtkButton *button = GTK_BUTTON (object);
 654   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 655
 656   switch (prop_id)
 657     {
 658     case PROP_LABEL:
 659       g_value_set_string (value, button->label_text);
 660       break;
 661     case PROP_IMAGE:
 662       g_value_set_object (value, (GObject *)priv->image);
 663       break;
 664     case PROP_RELIEF:
 665       g_value_set_enum (value, gtk_button_get_relief (button));
 666       break;
 667     case PROP_USE_UNDERLINE:
 668       g_value_set_boolean (value, button->use_underline);
 669       break;
 670     case PROP_USE_STOCK:
 671       g_value_set_boolean (value, button->use_stock);
 672       break;
 673     case PROP_FOCUS_ON_CLICK:
 674       g_value_set_boolean (value, button->focus_on_click);
 675       break;
 676     case PROP_XALIGN:
 677       g_value_set_float (value, priv->xalign);
 678       break;
 679     case PROP_YALIGN:
 680       g_value_set_float (value, priv->yalign);
 681       break;
 682     case PROP_IMAGE_POSITION:
 683       g_value_set_enum (value, priv->image_position);
 684       break;
 685     default:
 686       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 687       break;
 688     }
 689 }
 690
 691 GtkWidget*
 692 gtk_button_new (void)
 693 {
 694   return g_object_new (GTK_TYPE_BUTTON, NULL);
 695 }
 696
 697 static gboolean
 698 show_image (GtkButton *button)
 699 {
 700   gboolean show;
 701
 702   if (button->label_text)
 703     {
 704       GtkSettings *settings;
 705
 706       settings = gtk_widget_get_settings (GTK_WIDGET (button));
 707       g_object_get (settings, "gtk-button-images", &show, NULL);
 708     }
 709   else
 710     show = TRUE;
 711
 712   return show;
 713 }
 714
 715 static void
 716 gtk_button_construct_child (GtkButton *button)
 717 {
 718   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 719   GtkStockItem item;
 720   GtkWidget *label;
 721   GtkWidget *box;
 722   GtkWidget *align;
 723   GtkWidget *image = NULL;
 724   gchar *label_text = NULL;
 725   gint image_spacing;
 726
 727   if (!button->constructed)
 728     return;
 729
 730   if (!button->label_text && !priv->image)
 731     return;
 732
 733   gtk_widget_style_get (GTK_WIDGET (button),
 734                         "image-spacing", &image_spacing,
 735                         NULL);
 736
 737   if (priv->image && !priv->image_is_stock)
 738     {
 739       image = g_object_ref (priv->image);
 740       if (image->parent)
 741         gtk_container_remove (GTK_CONTAINER (image->parent), image);
 742     }
 743
 744   priv->image = NULL;
 745
 746   if (GTK_BIN (button)->child)
 747     gtk_container_remove (GTK_CONTAINER (button),
 748                           GTK_BIN (button)->child);
 749
 750   if (button->use_stock &&
 751       button->label_text &&
 752       gtk_stock_lookup (button->label_text, &item))
 753     {
 754       if (!image)
 755         image = g_object_ref (gtk_image_new_from_stock (button->label_text, GTK_ICON_SIZE_BUTTON));
 756
 757       label_text = item.label;
 758     }
 759   else
 760     label_text = button->label_text;
 761
 762   if (image)
 763     {
 764       priv->image = image;
 765       g_object_set (priv->image,
 766                     "visible", show_image (button),
 767                     "no-show-all", TRUE,
 768                     NULL);
 769
 770       if (priv->image_position == GTK_POS_LEFT ||
 771           priv->image_position == GTK_POS_RIGHT)
 772         box = gtk_hbox_new (FALSE, image_spacing);
 773       else
 774         box = gtk_vbox_new (FALSE, image_spacing);
 775
 776       if (priv->align_set)
 777         align = gtk_alignment_new (priv->xalign, priv->yalign, 0.0, 0.0);
 778       else
 779         align = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
 780
 781       if (priv->image_position == GTK_POS_LEFT ||
 782           priv->image_position == GTK_POS_TOP)
 783         gtk_box_pack_start (GTK_BOX (box), priv->image, FALSE, FALSE, 0);
 784       else
 785         gtk_box_pack_end (GTK_BOX (box), priv->image, FALSE, FALSE, 0);
 786
 787       if (label_text)
 788         {
 789           label = gtk_label_new_with_mnemonic (label_text);
 790           gtk_label_set_mnemonic_widget (GTK_LABEL (label),
 791                                          GTK_WIDGET (button));
 792
 793           if (priv->image_position == GTK_POS_RIGHT ||
 794               priv->image_position == GTK_POS_BOTTOM)
 795             gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
 796           else
 797             gtk_box_pack_end (GTK_BOX (box), label, FALSE, FALSE, 0);
 798         }
 799
 800       gtk_container_add (GTK_CONTAINER (button), align);
 801       gtk_container_add (GTK_CONTAINER (align), box);
 802       gtk_widget_show_all (align);
 803
 804       g_object_unref (image);
 805
 806       return;
 807     }
 808
 809   if (button->use_underline)
 810     {
 811       label = gtk_label_new_with_mnemonic (button->label_text);
 812       gtk_label_set_mnemonic_widget (GTK_LABEL (label), GTK_WIDGET (button));
 813     }
 814   else
 815     label = gtk_label_new (button->label_text);
 816
 817   if (priv->align_set)
 818     gtk_misc_set_alignment (GTK_MISC (label), priv->xalign, priv->yalign);
 819
 820   gtk_widget_show (label);
 821   gtk_container_add (GTK_CONTAINER (button), label);
 822 }
 823
 824
 825 GtkWidget*
 826 gtk_button_new_with_label (const gchar *label)
 827 {
 828   return g_object_new (GTK_TYPE_BUTTON, "label", label, NULL);
 829 }
 830
 831 /**
 832  * gtk_button_new_from_stock:
 833  * @stock_id: the name of the stock item
 834  *
 835  * Creates a new #GtkButton containing the image and text from a stock item.
 836  * Some stock ids have preprocessor macros like #GTK_STOCK_OK and
 837  * #GTK_STOCK_APPLY.
 838  *
 839  * If @stock_id is unknown, then it will be treated as a mnemonic
 840  * label (as for gtk_button_new_with_mnemonic()).
 841  *
 842  * Returns: a new #GtkButton
 843  **/
 844 GtkWidget*
 845 gtk_button_new_from_stock (const gchar *stock_id)
 846 {
 847   return g_object_new (GTK_TYPE_BUTTON,
 848                        "label", stock_id,
 849                        "use-stock", TRUE,
 850                        "use-underline", TRUE,
 851                        NULL);
 852 }
 853
 854 /**
 855  * gtk_button_new_with_mnemonic:
 856  * @label: The text of the button, with an underscore in front of the
 857  *         mnemonic character
 858  * @returns: a new #GtkButton
 859  *
 860  * Creates a new #GtkButton containing a label.
 861  * If characters in @label are preceded by an underscore, they are underlined.
 862  * If you need a literal underscore character in a label, use '__' (two
 863  * underscores). The first underlined character represents a keyboard
 864  * accelerator called a mnemonic.
 865  * Pressing Alt and that key activates the button.
 866  **/
 867 GtkWidget*
 868 gtk_button_new_with_mnemonic (const gchar *label)
 869 {
 870   return g_object_new (GTK_TYPE_BUTTON, "label", label, "use-underline", TRUE,  NULL);
 871 }
 872
 873 void
 874 gtk_button_pressed (GtkButton *button)
 875 {
 876   g_return_if_fail (GTK_IS_BUTTON (button));
 877
 878
 879   g_signal_emit (button, button_signals[PRESSED], 0);
 880 }
 881
 882 void
 883 gtk_button_released (GtkButton *button)
 884 {
 885   g_return_if_fail (GTK_IS_BUTTON (button));
 886
 887   g_signal_emit (button, button_signals[RELEASED], 0);
 888 }
 889
 890 void
 891 gtk_button_clicked (GtkButton *button)
 892 {
 893   g_return_if_fail (GTK_IS_BUTTON (button));
 894
 895   g_signal_emit (button, button_signals[CLICKED], 0);
 896 }
 897
 898 void
 899 gtk_button_enter (GtkButton *button)
 900 {
 901   g_return_if_fail (GTK_IS_BUTTON (button));
 902
 903   g_signal_emit (button, button_signals[ENTER], 0);
 904 }
 905
 906 void
 907 gtk_button_leave (GtkButton *button)
 908 {
 909   g_return_if_fail (GTK_IS_BUTTON (button));
 910
 911   g_signal_emit (button, button_signals[LEAVE], 0);
 912 }
 913
 914 void
 915 gtk_button_set_relief (GtkButton *button,
 916                        GtkReliefStyle newrelief)
 917 {
 918   g_return_if_fail (GTK_IS_BUTTON (button));
 919
 920   if (newrelief != button->relief)
 921     {
 922        button->relief = newrelief;
 923        g_object_notify (G_OBJECT (button), "relief");
 924        gtk_widget_queue_draw (GTK_WIDGET (button));
 925     }
 926 }
 927
 928 GtkReliefStyle
 929 gtk_button_get_relief (GtkButton *button)
 930 {
 931   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
 932
 933   return button->relief;
 934 }
 935
 936 static void
 937 gtk_button_realize (GtkWidget *widget)
 938 {
 939   GtkButton *button;
 940   GdkWindowAttr attributes;
 941   gint attributes_mask;
 942   gint border_width;
 943
 944   button = GTK_BUTTON (widget);
 945   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 946
 947   border_width = GTK_CONTAINER (widget)->border_width;
 948
 949   attributes.window_type = GDK_WINDOW_CHILD;
 950   attributes.x = widget->allocation.x + border_width;
 951   attributes.y = widget->allocation.y + border_width;
 952   attributes.width = widget->allocation.width - border_width * 2;
 953   attributes.height = widget->allocation.height - border_width * 2;
 954   attributes.wclass = GDK_INPUT_ONLY;
 955   attributes.event_mask = gtk_widget_get_events (widget);
 956   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 957                             GDK_BUTTON_RELEASE_MASK |
 958                             GDK_ENTER_NOTIFY_MASK |
 959                             GDK_LEAVE_NOTIFY_MASK);
 960
 961   attributes_mask = GDK_WA_X | GDK_WA_Y;
 962
 963   widget->window = gtk_widget_get_parent_window (widget);
 964   g_object_ref (widget->window);
 965
 966   button->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 967                                          &attributes, attributes_mask);
 968   gdk_window_set_user_data (button->event_window, button);
 969
 970   widget->style = gtk_style_attach (widget->style, widget->window);
 971 }
 972
 973 static void
 974 gtk_button_unrealize (GtkWidget *widget)
 975 {
 976   GtkButton *button = GTK_BUTTON (widget);
 977
 978   if (button->activate_timeout)
 979     gtk_button_finish_activate (button, FALSE);
 980
 981   if (button->event_window)
 982     {
 983       gdk_window_set_user_data (button->event_window, NULL);
 984       gdk_window_destroy (button->event_window);
 985       button->event_window = NULL;
 986     }
 987
 988   GTK_WIDGET_CLASS (gtk_button_parent_class)->unrealize (widget);
 989 }
 990
 991 static void
 992 gtk_button_map (GtkWidget *widget)
 993 {
 994   GtkButton *button = GTK_BUTTON (widget);
 995
 996   GTK_WIDGET_CLASS (gtk_button_parent_class)->map (widget);
 997
 998   if (button->event_window)
 999     gdk_window_show (button->event_window);
1000 }
1001
1002 static void
1003 gtk_button_unmap (GtkWidget *widget)
1004 {
1005   GtkButton *button = GTK_BUTTON (widget);
1006
1007   if (button->event_window)
1008     gdk_window_hide (button->event_window);
1009
1010   GTK_WIDGET_CLASS (gtk_button_parent_class)->unmap (widget);
1011 }
1012
1013 static void
1014 gtk_button_update_image_spacing (GtkButton *button)
1015 {
1016   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
1017   GtkWidget *child;
1018   gint spacing;
1019
1020   /* Keep in sync with gtk_button_construct_child,
1021    * we only want to update the spacing if the box
1022    * was constructed there.
1023    */
1024   if (!button->constructed || !priv->image)
1025     return;
1026
1027   child = GTK_BIN (button)->child;
1028   if (GTK_IS_ALIGNMENT (child))
1029     {
1030       child = GTK_BIN (child)->child;
1031       if (GTK_IS_BOX (child))
1032         {
1033           gtk_widget_style_get (GTK_WIDGET (button),
1034                                 "image-spacing", &spacing,
1035                                 NULL);
1036
1037           gtk_box_set_spacing (GTK_BOX (child), spacing);
1038         }
1039     }
1040 }
1041
1042 static void
1043 gtk_button_style_set (GtkWidget *widget,
1044                       GtkStyle  *prev_style)
1045 {
1046   gtk_button_update_image_spacing (GTK_BUTTON (widget));
1047 }
1048
1049 static void
1050 gtk_button_get_props (GtkButton *button,
1051                       GtkBorder *default_border,
1052                       GtkBorder *default_outside_border,
1053                       GtkBorder *inner_border,
1054                       gboolean  *interior_focus)
1055 {
1056   GtkWidget *widget =  GTK_WIDGET (button);
1057   GtkBorder *tmp_border;
1058
1059   if (default_border)
1060     {
1061       gtk_widget_style_get (widget, "default-border", &tmp_border, NULL);
1062
1063       if (tmp_border)
1064         {
1065           *default_border = *tmp_border;
1066           gtk_border_free (tmp_border);
1067         }
1068       else
1069         *default_border = default_default_border;
1070     }
1071
1072   if (default_outside_border)
1073     {
1074       gtk_widget_style_get (widget, "default-outside-border", &tmp_border, NULL);
1075
1076       if (tmp_border)
1077         {
1078           *default_outside_border = *tmp_border;
1079           gtk_border_free (tmp_border);
1080         }
1081       else
1082         *default_outside_border = default_default_outside_border;
1083     }
1084
1085   if (inner_border)
1086     {
1087       gtk_widget_style_get (widget, "inner-border", &tmp_border, NULL);
1088
1089       if (tmp_border)
1090         {
1091           *inner_border = *tmp_border;
1092           gtk_border_free (tmp_border);
1093         }
1094       else
1095         *inner_border = default_inner_border;
1096     }
1097
1098   if (interior_focus)
1099     gtk_widget_style_get (widget, "interior-focus", interior_focus, NULL);
1100 }
1101
1102 static void
1103 gtk_button_size_request (GtkWidget      *widget,
1104                          GtkRequisition *requisition)
1105 {
1106   GtkButton *button = GTK_BUTTON (widget);
1107   GtkBorder default_border;
1108   GtkBorder inner_border;
1109   gint focus_width;
1110   gint focus_pad;
1111
1112   gtk_button_get_props (button, &default_border, NULL, &inner_border, NULL);
1113   gtk_widget_style_get (GTK_WIDGET (widget),
1114                         "focus-line-width", &focus_width,
1115                         "focus-padding", &focus_pad,
1116                         NULL);
1117
1118   requisition->width = ((GTK_CONTAINER (widget)->border_width +
1119                          GTK_WIDGET (widget)->style->xthickness) * 2 +
1120                         inner_border.left + inner_border.right);
1121   requisition->height = ((GTK_CONTAINER (widget)->border_width +
1122                           GTK_WIDGET (widget)->style->ythickness) * 2 +
1123                          inner_border.top + inner_border.bottom);
1124
1125   if (GTK_WIDGET_CAN_DEFAULT (widget))
1126     {
1127       requisition->width += default_border.left + default_border.right;
1128       requisition->height += default_border.top + default_border.bottom;
1129     }
1130
1131   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
1132     {
1133       GtkRequisition child_requisition;
1134
1135       gtk_widget_size_request (GTK_BIN (button)->child, &child_requisition);
1136
1137       requisition->width += child_requisition.width;
1138       requisition->height += child_requisition.height;
1139     }
1140
1141   requisition->width += 2 * (focus_width + focus_pad);
1142   requisition->height += 2 * (focus_width + focus_pad);
1143 }
1144
1145 static void
1146 gtk_button_size_allocate (GtkWidget     *widget,
1147                           GtkAllocation *allocation)
1148 {
1149   GtkButton *button = GTK_BUTTON (widget);
1150   GtkAllocation child_allocation;
1151
1152   gint border_width = GTK_CONTAINER (widget)->border_width;
1153   gint xthickness = GTK_WIDGET (widget)->style->xthickness;
1154   gint ythickness = GTK_WIDGET (widget)->style->ythickness;
1155   GtkBorder default_border;
1156   GtkBorder inner_border;
1157   gint focus_width;
1158   gint focus_pad;
1159
1160   gtk_button_get_props (button, &default_border, NULL, &inner_border, NULL);
1161   gtk_widget_style_get (GTK_WIDGET (widget),
1162                         "focus-line-width", &focus_width,
1163                         "focus-padding", &focus_pad,
1164                         NULL);
1165
1166
1167   widget->allocation = *allocation;
1168
1169   if (GTK_WIDGET_REALIZED (widget))
1170     gdk_window_move_resize (button->event_window,
1171                             widget->allocation.x + border_width,
1172                             widget->allocation.y + border_width,
1173                             widget->allocation.width - border_width * 2,
1174                             widget->allocation.height - border_width * 2);
1175
1176   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
1177     {
1178       child_allocation.x = widget->allocation.x + border_width + inner_border.left + xthickness;
1179       child_allocation.y = widget->allocation.y + border_width + inner_border.top + ythickness;
1180
1181       child_allocation.width = MAX (1, widget->allocation.width -
1182                                     xthickness * 2 -
1183                                     inner_border.left -
1184                                     inner_border.right -
1185                                     border_width * 2);
1186       child_allocation.height = MAX (1, widget->allocation.height -
1187                                      ythickness * 2 -
1188                                      inner_border.top -
1189                                      inner_border.bottom -
1190                                      border_width * 2);
1191
1192       if (GTK_WIDGET_CAN_DEFAULT (button))
1193         {
1194           child_allocation.x += default_border.left;
1195           child_allocation.y += default_border.top;
1196           child_allocation.width =  MAX (1, child_allocation.width - default_border.left - default_border.right);
1197           child_allocation.height = MAX (1, child_allocation.height - default_border.top - default_border.bottom);
1198         }
1199
1200       if (GTK_WIDGET_CAN_FOCUS (button))
1201         {
1202           child_allocation.x += focus_width + focus_pad;
1203           child_allocation.y += focus_width + focus_pad;
1204           child_allocation.width =  MAX (1, child_allocation.width - (focus_width + focus_pad) * 2);
1205           child_allocation.height = MAX (1, child_allocation.height - (focus_width + focus_pad) * 2);
1206         }
1207
1208       if (button->depressed)
1209         {
1210           gint child_displacement_x;
1211           gint child_displacement_y;
1212
1213           gtk_widget_style_get (widget,
1214                                 "child-displacement-x", &child_displacement_x,
1215                                 "child-displacement-y", &child_displacement_y,
1216                                 NULL);
1217           child_allocation.x += child_displacement_x;
1218           child_allocation.y += child_displacement_y;
1219         }
1220
1221       gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
1222     }
1223 }
1224
1225 void
1226 _gtk_button_paint (GtkButton          *button,
1227                    const GdkRectangle *area,
1228                    GtkStateType        state_type,
1229                    GtkShadowType       shadow_type,
1230                    const gchar        *main_detail,
1231                    const gchar        *default_detail)
1232 {
1233   GtkWidget *widget;
1234   gint width, height;
1235   gint x, y;
1236   gint border_width;
1237   GtkBorder default_border;
1238   GtkBorder default_outside_border;
1239   gboolean interior_focus;
1240   gint focus_width;
1241   gint focus_pad;
1242
1243   if (GTK_WIDGET_DRAWABLE (button))
1244     {
1245       widget = GTK_WIDGET (button);
1246       border_width = GTK_CONTAINER (widget)->border_width;
1247
1248       gtk_button_get_props (button, &default_border, &default_outside_border, NULL, &interior_focus);
1249       gtk_widget_style_get (GTK_WIDGET (widget),
1250                             "focus-line-width", &focus_width,
1251                             "focus-padding", &focus_pad,
1252                             NULL);
1253
1254       x = widget->allocation.x + border_width;
1255       y = widget->allocation.y + border_width;
1256       width = widget->allocation.width - border_width * 2;
1257       height = widget->allocation.height - border_width * 2;
1258
1259       if (GTK_WIDGET_HAS_DEFAULT (widget) &&
1260           GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
1261         {
1262           gtk_paint_box (widget->style, widget->window,
1263                          GTK_STATE_NORMAL, GTK_SHADOW_IN,
1264                          area, widget, "buttondefault",
1265                          x, y, width, height);
1266
1267           x += default_border.left;
1268           y += default_border.top;
1269           width -= default_border.left + default_border.right;
1270           height -= default_border.top + default_border.bottom;
1271         }
1272       else if (GTK_WIDGET_CAN_DEFAULT (widget))
1273         {
1274           x += default_outside_border.left;
1275           y += default_outside_border.top;
1276           width -= default_outside_border.left + default_outside_border.right;
1277           height -= default_outside_border.top + default_outside_border.bottom;
1278         }
1279
1280       if (!interior_focus && GTK_WIDGET_HAS_FOCUS (widget))
1281         {
1282           x += focus_width + focus_pad;
1283           y += focus_width + focus_pad;
1284           width -= 2 * (focus_width + focus_pad);
1285           height -= 2 * (focus_width + focus_pad);
1286         }
1287
1288       if (button->relief != GTK_RELIEF_NONE || button->depressed ||
1289           GTK_WIDGET_STATE(widget) == GTK_STATE_PRELIGHT)
1290         gtk_paint_box (widget->style, widget->window,
1291                        state_type,
1292                        shadow_type, area, widget, "button",
1293                        x, y, width, height);
1294
1295       if (GTK_WIDGET_HAS_FOCUS (widget))
1296         {
1297           gint child_displacement_x;
1298           gint child_displacement_y;
1299           gboolean displace_focus;
1300
1301           gtk_widget_style_get (GTK_WIDGET (widget),
1302                                 "child-displacement-y", &child_displacement_y,
1303                                 "child-displacement-x", &child_displacement_x,
1304                                 "displace-focus", &displace_focus,
1305                                 NULL);
1306
1307           if (interior_focus)
1308             {
1309               x += widget->style->xthickness + focus_pad;
1310               y += widget->style->ythickness + focus_pad;
1311               width -= 2 * (widget->style->xthickness + focus_pad);
1312               height -=  2 * (widget->style->ythickness + focus_pad);
1313             }
1314           else
1315             {
1316               x -= focus_width + focus_pad;
1317               y -= focus_width + focus_pad;
1318               width += 2 * (focus_width + focus_pad);
1319               height += 2 * (focus_width + focus_pad);
1320             }
1321
1322           if (button->depressed && displace_focus)
1323             {
1324               x += child_displacement_x;
1325               y += child_displacement_y;
1326             }
1327
1328           gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
1329                            area, widget, "button",
1330                            x, y, width, height);
1331         }
1332     }
1333 }
1334
1335 static gboolean
1336 gtk_button_expose (GtkWidget      *widget,
1337                    GdkEventExpose *event)
1338 {
1339   if (GTK_WIDGET_DRAWABLE (widget))
1340     {
1341       GtkButton *button = GTK_BUTTON (widget);
1342
1343       _gtk_button_paint (button, &event->area,
1344                          GTK_WIDGET_STATE (widget),
1345                          button->depressed ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
1346                          "button", "buttondefault");
1347
1348       (* GTK_WIDGET_CLASS (gtk_button_parent_class)->expose_event) (widget, event);
1349     }
1350
1351   return FALSE;
1352 }
1353
1354 static gboolean
1355 gtk_button_button_press (GtkWidget      *widget,
1356                          GdkEventButton *event)
1357 {
1358   GtkButton *button;
1359
1360   if (event->type == GDK_BUTTON_PRESS)
1361     {
1362       button = GTK_BUTTON (widget);
1363
1364       if (button->focus_on_click && !GTK_WIDGET_HAS_FOCUS (widget))
1365         gtk_widget_grab_focus (widget);
1366
1367       if (event->button == 1)
1368         gtk_button_pressed (button);
1369     }
1370
1371   return TRUE;
1372 }
1373
1374 static gboolean
1375 gtk_button_button_release (GtkWidget      *widget,
1376                            GdkEventButton *event)
1377 {
1378   GtkButton *button;
1379
1380   if (event->button == 1)
1381     {
1382       button = GTK_BUTTON (widget);
1383       gtk_button_released (button);
1384     }
1385
1386   return TRUE;
1387 }
1388
1389 static gboolean
1390 gtk_button_grab_broken (GtkWidget          *widget,
1391                         GdkEventGrabBroken *event)
1392 {
1393   GtkButton *button = GTK_BUTTON (widget);
1394   gboolean save_in;
1395
1396   /* Simulate a button release without the pointer in the button */
1397   if (button->button_down)
1398     {
1399       save_in = button->in_button;
1400       button->in_button = FALSE;
1401       gtk_button_released (button);
1402       if (save_in != button->in_button)
1403         {
1404           button->in_button = save_in;
1405           gtk_button_update_state (button);
1406         }
1407     }
1408
1409   return TRUE;
1410 }
1411
1412 static gboolean
1413 gtk_button_key_release (GtkWidget   *widget,
1414                         GdkEventKey *event)
1415 {
1416   GtkButton *button = GTK_BUTTON (widget);
1417
1418   if (button->activate_timeout)
1419     {
1420       gtk_button_finish_activate (button, TRUE);
1421       return TRUE;
1422     }
1423   else if (GTK_WIDGET_CLASS (gtk_button_parent_class)->key_release_event)
1424     return GTK_WIDGET_CLASS (gtk_button_parent_class)->key_release_event (widget, event);
1425   else
1426     return FALSE;
1427 }
1428
1429 static gboolean
1430 gtk_button_enter_notify (GtkWidget        *widget,
1431                          GdkEventCrossing *event)
1432 {
1433   GtkButton *button;
1434   GtkWidget *event_widget;
1435
1436   button = GTK_BUTTON (widget);
1437   event_widget = gtk_get_event_widget ((GdkEvent*) event);
1438
1439   if ((event_widget == widget) &&
1440       (event->detail != GDK_NOTIFY_INFERIOR))
1441     {
1442       button->in_button = TRUE;
1443       gtk_button_enter (button);
1444     }
1445
1446   return FALSE;
1447 }
1448
1449 static gboolean
1450 gtk_button_leave_notify (GtkWidget        *widget,
1451                          GdkEventCrossing *event)
1452 {
1453   GtkButton *button;
1454   GtkWidget *event_widget;
1455
1456   button = GTK_BUTTON (widget);
1457   event_widget = gtk_get_event_widget ((GdkEvent*) event);
1458
1459   if ((event_widget == widget) &&
1460       (event->detail != GDK_NOTIFY_INFERIOR))
1461     {
1462       button->in_button = FALSE;
1463       gtk_button_leave (button);
1464     }
1465
1466   return FALSE;
1467 }
1468
1469 static void
1470 gtk_real_button_pressed (GtkButton *button)
1471 {
1472   if (button->activate_timeout)
1473     return;
1474
1475   button->button_down = TRUE;
1476   gtk_button_update_state (button);
1477 }
1478
1479 static void
1480 gtk_real_button_released (GtkButton *button)
1481 {
1482   if (button->button_down)
1483     {
1484       button->button_down = FALSE;
1485
1486       if (button->activate_timeout)
1487         return;
1488
1489       if (button->in_button)
1490         gtk_button_clicked (button);
1491
1492       gtk_button_update_state (button);
1493     }
1494 }
1495
1496 static gboolean
1497 button_activate_timeout (gpointer data)
1498 {
1499   gtk_button_finish_activate (data, TRUE);
1500
1501   return FALSE;
1502 }
1503
1504 static void
1505 gtk_real_button_activate (GtkButton *button)
1506 {
1507   GtkWidget *widget = GTK_WIDGET (button);
1508   GtkButtonPrivate *priv;
1509   guint32 time;
1510
1511   priv = GTK_BUTTON_GET_PRIVATE (button);
1512
1513   if (GTK_WIDGET_REALIZED (button) && !button->activate_timeout)
1514     {
1515       time = gtk_get_current_event_time ();
1516       if (gdk_keyboard_grab (button->event_window, TRUE, time) ==
1517           GDK_GRAB_SUCCESS)
1518         {
1519           priv->has_grab = TRUE;
1520           priv->grab_time = time;
1521         }
1522
1523       gtk_grab_add (widget);
1524
1525       button->activate_timeout = gdk_threads_add_timeout (ACTIVATE_TIMEOUT,
1526                                                 button_activate_timeout,
1527                                                 button);
1528       button->button_down = TRUE;
1529       gtk_button_update_state (button);
1530       gtk_widget_queue_draw (GTK_WIDGET (button));
1531     }
1532 }
1533
1534 static void
1535 gtk_button_finish_activate (GtkButton *button,
1536                             gboolean   do_it)
1537 {
1538   GtkWidget *widget = GTK_WIDGET (button);
1539   GtkButtonPrivate *priv;
1540
1541   priv = GTK_BUTTON_GET_PRIVATE (button);
1542
1543   g_source_remove (button->activate_timeout);
1544   button->activate_timeout = 0;
1545
1546   if (priv->has_grab)
1547     {
1548       gdk_display_keyboard_ungrab (gtk_widget_get_display (widget),
1549                                    priv->grab_time);
1550     }
1551   gtk_grab_remove (widget);
1552
1553   button->button_down = FALSE;
1554
1555   gtk_button_update_state (button);
1556   gtk_widget_queue_draw (GTK_WIDGET (button));
1557
1558   if (do_it)
1559     gtk_button_clicked (button);
1560 }
1561
1562 /**
1563  * gtk_button_set_label:
1564  * @button: a #GtkButton
1565  * @label: a string
1566  *
1567  * Sets the text of the label of the button to @str. This text is
1568  * also used to select the stock item if gtk_button_set_use_stock()
1569  * is used.
1570  *
1571  * This will also clear any previously set labels.
1572  **/
1573 void
1574 gtk_button_set_label (GtkButton   *button,
1575                       const gchar *label)
1576 {
1577   gchar *new_label;
1578
1579   g_return_if_fail (GTK_IS_BUTTON (button));
1580
1581   new_label = g_strdup (label);
1582   g_free (button->label_text);
1583   button->label_text = new_label;
1584
1585   gtk_button_construct_child (button);
1586
1587   g_object_notify (G_OBJECT (button), "label");
1588 }
1589
1590 /**
1591  * gtk_button_get_label:
1592  * @button: a #GtkButton
1593  *
1594  * Fetches the text from the label of the button, as set by
1595  * gtk_button_set_label(). If the label text has not
1596  * been set the return value will be %NULL. This will be the
1597  * case if you create an empty button with gtk_button_new() to
1598  * use as a container.
1599  *
1600  * Return value: The text of the label widget. This string is owned
1601  * by the widget and must not be modified or freed.
1602  **/
1603 G_CONST_RETURN gchar *
1604 gtk_button_get_label (GtkButton *button)
1605 {
1606   g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
1607
1608   return button->label_text;
1609 }
1610
1611 /**
1612  * gtk_button_set_use_underline:
1613  * @button: a #GtkButton
1614  * @use_underline: %TRUE if underlines in the text indicate mnemonics
1615  *
1616  * If true, an underline in the text of the button label indicates
1617  * the next character should be used for the mnemonic accelerator key.
1618  */
1619 void
1620 gtk_button_set_use_underline (GtkButton *button,
1621                               gboolean   use_underline)
1622 {
1623   g_return_if_fail (GTK_IS_BUTTON (button));
1624
1625   use_underline = use_underline != FALSE;
1626
1627   if (use_underline != button->use_underline)
1628     {
1629       button->use_underline = use_underline;
1630
1631       gtk_button_construct_child (button);
1632
1633       g_object_notify (G_OBJECT (button), "use-underline");
1634     }
1635 }
1636
1637 /**
1638  * gtk_button_get_use_underline:
1639  * @button: a #GtkButton
1640  *
1641  * Returns whether an embedded underline in the button label indicates a
1642  * mnemonic. See gtk_button_set_use_underline ().
1643  *
1644  * Return value: %TRUE if an embedded underline in the button label
1645  *               indicates the mnemonic accelerator keys.
1646  **/
1647 gboolean
1648 gtk_button_get_use_underline (GtkButton *button)
1649 {
1650   g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
1651
1652   return button->use_underline;
1653 }
1654
1655 /**
1656  * gtk_button_set_use_stock:
1657  * @button: a #GtkButton
1658  * @use_stock: %TRUE if the button should use a stock item
1659  *
1660  * If %TRUE, the label set on the button is used as a
1661  * stock id to select the stock item for the button.
1662  */
1663 void
1664 gtk_button_set_use_stock (GtkButton *button,
1665                           gboolean   use_stock)
1666 {
1667   g_return_if_fail (GTK_IS_BUTTON (button));
1668
1669   use_stock = use_stock != FALSE;
1670
1671   if (use_stock != button->use_stock)
1672     {
1673       button->use_stock = use_stock;
1674
1675       gtk_button_construct_child (button);
1676
1677       g_object_notify (G_OBJECT (button), "use-stock");
1678     }
1679 }
1680
1681 /**
1682  * gtk_button_get_use_stock:
1683  * @button: a #GtkButton
1684  *
1685  * Returns whether the button label is a stock item.
1686  *
1687  * Return value: %TRUE if the button label is used to
1688  *               select a stock item instead of being
1689  *               used directly as the label text.
1690  */
1691 gboolean
1692 gtk_button_get_use_stock (GtkButton *button)
1693 {
1694   g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
1695
1696   return button->use_stock;
1697 }
1698
1699 /**
1700  * gtk_button_set_focus_on_click:
1701  * @button: a #GtkButton
1702  * @focus_on_click: whether the button grabs focus when clicked with the mouse
1703  *
1704  * Sets whether the button will grab focus when it is clicked with the mouse.
1705  * Making mouse clicks not grab focus is useful in places like toolbars where
1706  * you don't want the keyboard focus removed from the main area of the
1707  * application.
1708  *
1709  * Since: 2.4
1710  **/
1711 void
1712 gtk_button_set_focus_on_click (GtkButton *button,
1713                                gboolean   focus_on_click)
1714 {
1715   g_return_if_fail (GTK_IS_BUTTON (button));
1716
1717   focus_on_click = focus_on_click != FALSE;
1718
1719   if (button->focus_on_click != focus_on_click)
1720     {
1721       button->focus_on_click = focus_on_click;
1722
1723       g_object_notify (G_OBJECT (button), "focus-on-click");
1724     }
1725 }
1726
1727 /**
1728  * gtk_button_get_focus_on_click:
1729  * @button: a #GtkButton
1730  *
1731  * Returns whether the button grabs focus when it is clicked with the mouse.
1732  * See gtk_button_set_focus_on_click().
1733  *
1734  * Return value: %TRUE if the button grabs focus when it is clicked with
1735  *               the mouse.
1736  *
1737  * Since: 2.4
1738  **/
1739 gboolean
1740 gtk_button_get_focus_on_click (GtkButton *button)
1741 {
1742   g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
1743
1744   return button->focus_on_click;
1745 }
1746
1747 /**
1748  * gtk_button_set_alignment:
1749  * @button: a #GtkButton
1750  * @xalign: the horizontal position of the child, 0.0 is left aligned,
1751  *   1.0 is right aligned
1752  * @yalign: the vertical position of the child, 0.0 is top aligned,
1753  *   1.0 is bottom aligned
1754  *
1755  * Sets the alignment of the child. This property has no effect unless
1756  * the child is a #GtkMisc or a #GtkAligment.
1757  *
1758  * Since: 2.4
1759  */
1760 void
1761 gtk_button_set_alignment (GtkButton *button,
1762                           gfloat     xalign,
1763                           gfloat     yalign)
1764 {
1765   GtkButtonPrivate *priv;
1766
1767   g_return_if_fail (GTK_IS_BUTTON (button));
1768
1769   priv = GTK_BUTTON_GET_PRIVATE (button);
1770
1771   priv->xalign = xalign;
1772   priv->yalign = yalign;
1773   priv->align_set = 1;
1774
1775   maybe_set_alignment (button, GTK_BIN (button)->child);
1776
1777   g_object_freeze_notify (G_OBJECT (button));
1778   g_object_notify (G_OBJECT (button), "xalign");
1779   g_object_notify (G_OBJECT (button), "yalign");
1780   g_object_thaw_notify (G_OBJECT (button));
1781 }
1782
1783 /**
1784  * gtk_button_get_alignment:
1785  * @button: a #GtkButton
1786  * @xalign: return location for horizontal alignment
1787  * @yalign: return location for vertical alignment
1788  *
1789  * Gets the alignment of the child in the button.
1790  *
1791  * Since: 2.4
1792  */
1793 void
1794 gtk_button_get_alignment (GtkButton *button,
1795                           gfloat    *xalign,
1796                           gfloat    *yalign)
1797 {
1798   GtkButtonPrivate *priv;
1799
1800   g_return_if_fail (GTK_IS_BUTTON (button));
1801
1802   priv = GTK_BUTTON_GET_PRIVATE (button);
1803
1804   if (xalign)
1805     *xalign = priv->xalign;
1806
1807   if (yalign)
1808     *yalign = priv->yalign;
1809 }
1810
1811 /**
1812  * _gtk_button_set_depressed:
1813  * @button: a #GtkButton
1814  * @depressed: %TRUE if the button should be drawn with a recessed shadow.
1815  *
1816  * Sets whether the button is currently drawn as down or not. This is
1817  * purely a visual setting, and is meant only for use by derived widgets
1818  * such as #GtkToggleButton.
1819  **/
1820 void
1821 _gtk_button_set_depressed (GtkButton *button,
1822                            gboolean   depressed)
1823 {
1824   GtkWidget *widget = GTK_WIDGET (button);
1825
1826   depressed = depressed != FALSE;
1827
1828   if (depressed != button->depressed)
1829     {
1830       button->depressed = depressed;
1831       gtk_widget_queue_resize (widget);
1832     }
1833 }
1834
1835 static void
1836 gtk_button_update_state (GtkButton *button)
1837 {
1838   gboolean depressed;
1839   GtkStateType new_state;
1840
1841   if (button->activate_timeout)
1842     depressed = button->depress_on_activate;
1843   else
1844     depressed = button->in_button && button->button_down;
1845
1846   if (button->in_button && (!button->button_down || !depressed))
1847     new_state = GTK_STATE_PRELIGHT;
1848   else
1849     new_state = depressed ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL;
1850
1851   _gtk_button_set_depressed (button, depressed);
1852   gtk_widget_set_state (GTK_WIDGET (button), new_state);
1853 }
1854
1855 static void
1856 show_image_change_notify (GtkButton *button)
1857 {
1858   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
1859
1860   if (priv->image)
1861     {
1862       if (show_image (button))
1863         gtk_widget_show (priv->image);
1864       else
1865         gtk_widget_hide (priv->image);
1866     }
1867 }
1868
1869 static void
1870 traverse_container (GtkWidget *widget,
1871                     gpointer   data)
1872 {
1873   if (GTK_IS_BUTTON (widget))
1874     show_image_change_notify (GTK_BUTTON (widget));
1875   else if (GTK_IS_CONTAINER (widget))
1876     gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
1877 }
1878
1879 static void
1880 gtk_button_setting_changed (GtkSettings *settings)
1881 {
1882   GList *list, *l;
1883
1884   list = gtk_window_list_toplevels ();
1885
1886   for (l = list; l; l = l->next)
1887     gtk_container_forall (GTK_CONTAINER (l->data),
1888                           traverse_container, NULL);
1889
1890   g_list_free (list);
1891 }
1892
1893
1894 static void
1895 gtk_button_screen_changed (GtkWidget *widget,
1896                            GdkScreen *previous_screen)
1897 {
1898   GtkSettings *settings;
1899   guint show_image_connection;
1900
1901   if (!gtk_widget_has_screen (widget))
1902     return;
1903
1904   settings = gtk_widget_get_settings (widget);
1905
1906   show_image_connection =
1907     GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings),
1908                                          "gtk-button-connection"));
1909
1910   if (show_image_connection)
1911     return;
1912
1913   show_image_connection =
1914     g_signal_connect (settings, "notify::gtk-button-images",
1915                       G_CALLBACK (gtk_button_setting_changed), NULL);
1916   g_object_set_data (G_OBJECT (settings),
1917                      I_("gtk-button-connection"),
1918                      GUINT_TO_POINTER (show_image_connection));
1919
1920   show_image_change_notify (GTK_BUTTON (widget));
1921 }
1922
1923 static void
1924 gtk_button_state_changed (GtkWidget    *widget,
1925                           GtkStateType  previous_state)
1926 {
1927   GtkButton *button = GTK_BUTTON (widget);
1928
1929   if (!GTK_WIDGET_IS_SENSITIVE (widget))
1930     {
1931       button->in_button = FALSE;
1932       gtk_real_button_released (button);
1933     }
1934 }
1935
1936 static void
1937 gtk_button_grab_notify (GtkWidget *widget,
1938                         gboolean   was_grabbed)
1939 {
1940   GtkButton *button = GTK_BUTTON (widget);
1941   gboolean save_in;
1942
1943   if (!was_grabbed)
1944     {
1945       save_in = button->in_button;
1946       button->in_button = FALSE;
1947       gtk_real_button_released (button);
1948       if (save_in != button->in_button)
1949         {
1950           button->in_button = save_in;
1951           gtk_button_update_state (button);
1952         }
1953     }
1954 }
1955
1956 /**
1957  * gtk_button_set_image:
1958  * @button: a #GtkButton
1959  * @image: a widget to set as the image for the button
1960  *
1961  * Set the image of @button to the given widget. Note that
1962  * it depends on the #GtkSettings:gtk-button-images setting whether the
1963  * image will be displayed or not, you don't have to call
1964  * gtk_widget_show() on @image yourself.
1965  *
1966  * Since: 2.6
1967  */
1968 void
1969 gtk_button_set_image (GtkButton *button,
1970                       GtkWidget *image)
1971 {
1972   GtkButtonPrivate *priv;
1973
1974   g_return_if_fail (GTK_IS_BUTTON (button));
1975   g_return_if_fail (image == NULL || GTK_IS_WIDGET (image));
1976
1977   priv = GTK_BUTTON_GET_PRIVATE (button);
1978
1979   if (priv->image && priv->image->parent)
1980     gtk_container_remove (GTK_CONTAINER (priv->image->parent), priv->image);
1981
1982   priv->image = image;
1983   priv->image_is_stock = (image == NULL);
1984
1985   gtk_button_construct_child (button);
1986
1987   g_object_notify (G_OBJECT (button), "image");
1988 }
1989
1990 /**
1991  * gtk_button_get_image:
1992  * @button: a #GtkButton
1993  *
1994  * Gets the widget that is currenty set as the image of @button.
1995  * This may have been explicitly set by gtk_button_set_image()
1996  * or constructed by gtk_button_new_from_stock().
1997  *
1998  * Return value: a #GtkWidget or %NULL in case there is no image
1999  *
2000  * Since: 2.6
2001  */
2002 GtkWidget *
2003 gtk_button_get_image (GtkButton *button)
2004 {
2005   GtkButtonPrivate *priv;
2006
2007   g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
2008
2009   priv = GTK_BUTTON_GET_PRIVATE (button);
2010
2011   return priv->image;
2012 }
2013
2014 /**
2015  * gtk_button_set_image_position:
2016  * @button: a #GtkButton
2017  * @position: the position
2018  *
2019  * Sets the position of the image relative to the text
2020  * inside the button.
2021  *
2022  * Since: 2.10
2023  */
2024 void
2025 gtk_button_set_image_position (GtkButton       *button,
2026                                GtkPositionType  position)
2027 {
2028
2029   GtkButtonPrivate *priv;
2030
2031   g_return_if_fail (GTK_IS_BUTTON (button));
2032   g_return_if_fail (position >= GTK_POS_LEFT && position <= GTK_POS_BOTTOM);
2033
2034   priv = GTK_BUTTON_GET_PRIVATE (button);
2035
2036   if (priv->image_position != position)
2037     {
2038       priv->image_position = position;
2039
2040       gtk_button_construct_child (button);
2041
2042       g_object_notify (G_OBJECT (button), "image-position");
2043     }
2044 }
2045
2046 /**
2047  * gtk_button_get_image_position:
2048  * @button: a #GtkButton
2049  *
2050  * Gets the position of the image relative to the text
2051  * inside the button.
2052  *
2053  * Return value: the position
2054  *
2055  * Since: 2.10
2056  */
2057 GtkPositionType
2058 gtk_button_get_image_position (GtkButton *button)
2059 {
2060   GtkButtonPrivate *priv;
2061
2062   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_POS_LEFT);
2063
2064   priv = GTK_BUTTON_GET_PRIVATE (button);
2065
2066   return priv->image_position;
2067 }
2068
2069
2070 #define __GTK_BUTTON_C__
2071 #include "gtkaliasdef.c"