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: 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: 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: 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: 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    * "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 should also
 442    * 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   gtk_settings_install_property (g_param_spec_boolean ("gtk-button-images",
 485                                                        P_("Show button images"),
 486                                                        P_("Whether stock icons should be shown in buttons"),
 487                                                        TRUE,
 488                                                        GTK_PARAM_READWRITE));
 489
 490   g_type_class_add_private (gobject_class, sizeof (GtkButtonPrivate));
 491 }
 492
 493 static void
 494 gtk_button_init (GtkButton *button)
 495 {
 496   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 497
 498   GTK_WIDGET_SET_FLAGS (button, GTK_CAN_FOCUS | GTK_RECEIVES_DEFAULT);
 499   GTK_WIDGET_SET_FLAGS (button, GTK_NO_WINDOW);
 500
 501   button->label_text = NULL;
 502
 503   button->constructed = FALSE;
 504   button->in_button = FALSE;
 505   button->button_down = FALSE;
 506   button->relief = GTK_RELIEF_NORMAL;
 507   button->use_stock = FALSE;
 508   button->use_underline = FALSE;
 509   button->depressed = FALSE;
 510   button->depress_on_activate = TRUE;
 511   button->focus_on_click = TRUE;
 512
 513   priv->xalign = 0.5;
 514   priv->yalign = 0.5;
 515   priv->align_set = 0;
 516   priv->image_is_stock = TRUE;
 517   priv->image_position = GTK_POS_LEFT;
 518 }
 519
 520 static void
 521 gtk_button_destroy (GtkObject *object)
 522 {
 523   GtkButton *button = GTK_BUTTON (object);
 524
 525   if (button->label_text)
 526     {
 527       g_free (button->label_text);
 528       button->label_text = NULL;
 529     }
 530
 531   (* GTK_OBJECT_CLASS (gtk_button_parent_class)->destroy) (object);
 532 }
 533
 534 static GObject*
 535 gtk_button_constructor (GType                  type,
 536                         guint                  n_construct_properties,
 537                         GObjectConstructParam *construct_params)
 538 {
 539   GObject *object;
 540   GtkButton *button;
 541
 542   object = (* G_OBJECT_CLASS (gtk_button_parent_class)->constructor) (type,
 543                                                                       n_construct_properties,
 544                                                                       construct_params);
 545
 546   button = GTK_BUTTON (object);
 547   button->constructed = TRUE;
 548
 549   if (button->label_text != NULL)
 550     gtk_button_construct_child (button);
 551
 552   return object;
 553 }
 554
 555
 556 static GType
 557 gtk_button_child_type  (GtkContainer     *container)
 558 {
 559   if (!GTK_BIN (container)->child)
 560     return GTK_TYPE_WIDGET;
 561   else
 562     return G_TYPE_NONE;
 563 }
 564
 565 static void
 566 maybe_set_alignment (GtkButton *button,
 567                      GtkWidget *widget)
 568 {
 569   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 570
 571   if (GTK_IS_MISC (widget))
 572     {
 573       GtkMisc *misc = GTK_MISC (widget);
 574
 575       if (priv->align_set)
 576         gtk_misc_set_alignment (misc, priv->xalign, priv->yalign);
 577     }
 578   else if (GTK_IS_ALIGNMENT (widget))
 579     {
 580       GtkAlignment *alignment = GTK_ALIGNMENT (widget);
 581
 582       if (priv->align_set)
 583         gtk_alignment_set (alignment, priv->xalign, priv->yalign,
 584                            alignment->xscale, alignment->yscale);
 585     }
 586 }
 587
 588 static void
 589 gtk_button_add (GtkContainer *container,
 590                 GtkWidget    *widget)
 591 {
 592   maybe_set_alignment (GTK_BUTTON (container), widget);
 593
 594   GTK_CONTAINER_CLASS (gtk_button_parent_class)->add (container, widget);
 595 }
 596
 597 static void
 598 gtk_button_set_property (GObject         *object,
 599                          guint            prop_id,
 600                          const GValue    *value,
 601                          GParamSpec      *pspec)
 602 {
 603   GtkButton *button = GTK_BUTTON (object);
 604   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 605
 606   switch (prop_id)
 607     {
 608     case PROP_LABEL:
 609       gtk_button_set_label (button, g_value_get_string (value));
 610       break;
 611     case PROP_IMAGE:
 612       gtk_button_set_image (button, (GtkWidget *) g_value_get_object (value));
 613       break;
 614     case PROP_RELIEF:
 615       gtk_button_set_relief (button, g_value_get_enum (value));
 616       break;
 617     case PROP_USE_UNDERLINE:
 618       gtk_button_set_use_underline (button, g_value_get_boolean (value));
 619       break;
 620     case PROP_USE_STOCK:
 621       gtk_button_set_use_stock (button, g_value_get_boolean (value));
 622       break;
 623     case PROP_FOCUS_ON_CLICK:
 624       gtk_button_set_focus_on_click (button, g_value_get_boolean (value));
 625       break;
 626     case PROP_XALIGN:
 627       gtk_button_set_alignment (button, g_value_get_float (value), priv->yalign);
 628       break;
 629     case PROP_YALIGN:
 630       gtk_button_set_alignment (button, priv->xalign, g_value_get_float (value));
 631       break;
 632     case PROP_IMAGE_POSITION:
 633       gtk_button_set_image_position (button, g_value_get_enum (value));
 634       break;
 635     default:
 636       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 637       break;
 638     }
 639 }
 640
 641 static void
 642 gtk_button_get_property (GObject         *object,
 643                          guint            prop_id,
 644                          GValue          *value,
 645                          GParamSpec      *pspec)
 646 {
 647   GtkButton *button = GTK_BUTTON (object);
 648   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 649
 650   switch (prop_id)
 651     {
 652     case PROP_LABEL:
 653       g_value_set_string (value, button->label_text);
 654       break;
 655     case PROP_IMAGE:
 656       g_value_set_object (value, (GObject *)priv->image);
 657       break;
 658     case PROP_RELIEF:
 659       g_value_set_enum (value, gtk_button_get_relief (button));
 660       break;
 661     case PROP_USE_UNDERLINE:
 662       g_value_set_boolean (value, button->use_underline);
 663       break;
 664     case PROP_USE_STOCK:
 665       g_value_set_boolean (value, button->use_stock);
 666       break;
 667     case PROP_FOCUS_ON_CLICK:
 668       g_value_set_boolean (value, button->focus_on_click);
 669       break;
 670     case PROP_XALIGN:
 671       g_value_set_float (value, priv->xalign);
 672       break;
 673     case PROP_YALIGN:
 674       g_value_set_float (value, priv->yalign);
 675       break;
 676     case PROP_IMAGE_POSITION:
 677       g_value_set_enum (value, priv->image_position);
 678       break;
 679     default:
 680       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 681       break;
 682     }
 683 }
 684
 685 GtkWidget*
 686 gtk_button_new (void)
 687 {
 688   return g_object_new (GTK_TYPE_BUTTON, NULL);
 689 }
 690
 691 static gboolean
 692 show_image (GtkButton *button)
 693 {
 694   gboolean show;
 695
 696   if (button->label_text)
 697     {
 698       GtkSettings *settings;
 699
 700       settings = gtk_widget_get_settings (GTK_WIDGET (button));
 701       g_object_get (settings, "gtk-button-images", &show, NULL);
 702     }
 703   else
 704     show = TRUE;
 705
 706   return show;
 707 }
 708
 709 static void
 710 gtk_button_construct_child (GtkButton *button)
 711 {
 712   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
 713   GtkStockItem item;
 714   GtkWidget *label;
 715   GtkWidget *box;
 716   GtkWidget *align;
 717   GtkWidget *image = NULL;
 718   gchar *label_text = NULL;
 719   gint image_spacing;
 720
 721   if (!button->constructed)
 722     return;
 723
 724   if (!button->label_text && !priv->image)
 725     return;
 726
 727   gtk_widget_style_get (GTK_WIDGET (button),
 728                         "image-spacing", &image_spacing,
 729                         NULL);
 730
 731   if (priv->image && !priv->image_is_stock)
 732     {
 733       image = g_object_ref (priv->image);
 734       if (image->parent)
 735         gtk_container_remove (GTK_CONTAINER (image->parent), image);
 736
 737       priv->image = NULL;
 738     }
 739
 740   if (GTK_BIN (button)->child)
 741     gtk_container_remove (GTK_CONTAINER (button),
 742                           GTK_BIN (button)->child);
 743
 744   if (button->use_stock &&
 745       button->label_text &&
 746       gtk_stock_lookup (button->label_text, &item))
 747     {
 748       if (!image)
 749         image = g_object_ref (gtk_image_new_from_stock (button->label_text, GTK_ICON_SIZE_BUTTON));
 750
 751       label_text = item.label;
 752     }
 753   else
 754     label_text = button->label_text;
 755
 756   if (image)
 757     {
 758       priv->image = image;
 759       g_object_set (priv->image,
 760                     "visible", show_image (button),
 761                     "no-show-all", TRUE,
 762                     NULL);
 763
 764       if (priv->image_position == GTK_POS_LEFT ||
 765           priv->image_position == GTK_POS_RIGHT)
 766         box = gtk_hbox_new (FALSE, image_spacing);
 767       else
 768         box = gtk_vbox_new (FALSE, image_spacing);
 769
 770       if (priv->align_set)
 771         align = gtk_alignment_new (priv->xalign, priv->yalign, 0.0, 0.0);
 772       else
 773         align = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
 774
 775       if (priv->image_position == GTK_POS_LEFT ||
 776           priv->image_position == GTK_POS_TOP)
 777         gtk_box_pack_start (GTK_BOX (box), priv->image, FALSE, FALSE, 0);
 778       else
 779         gtk_box_pack_end (GTK_BOX (box), priv->image, FALSE, FALSE, 0);
 780
 781       if (label_text)
 782         {
 783           label = gtk_label_new_with_mnemonic (label_text);
 784           gtk_label_set_mnemonic_widget (GTK_LABEL (label),
 785                                          GTK_WIDGET (button));
 786
 787           if (priv->image_position == GTK_POS_RIGHT ||
 788               priv->image_position == GTK_POS_BOTTOM)
 789             gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
 790           else
 791             gtk_box_pack_end (GTK_BOX (box), label, FALSE, FALSE, 0);
 792         }
 793
 794       gtk_container_add (GTK_CONTAINER (button), align);
 795       gtk_container_add (GTK_CONTAINER (align), box);
 796       gtk_widget_show_all (align);
 797
 798       g_object_unref (image);
 799
 800       return;
 801     }
 802
 803   if (button->use_underline)
 804     {
 805       label = gtk_label_new_with_mnemonic (button->label_text);
 806       gtk_label_set_mnemonic_widget (GTK_LABEL (label), GTK_WIDGET (button));
 807     }
 808   else
 809     label = gtk_label_new (button->label_text);
 810
 811   if (priv->align_set)
 812     gtk_misc_set_alignment (GTK_MISC (label), priv->xalign, priv->yalign);
 813
 814   gtk_widget_show (label);
 815   gtk_container_add (GTK_CONTAINER (button), label);
 816 }
 817
 818
 819 GtkWidget*
 820 gtk_button_new_with_label (const gchar *label)
 821 {
 822   return g_object_new (GTK_TYPE_BUTTON, "label", label, NULL);
 823 }
 824
 825 /**
 826  * gtk_button_new_from_stock:
 827  * @stock_id: the name of the stock item
 828  *
 829  * Creates a new #GtkButton containing the image and text from a stock item.
 830  * Some stock ids have preprocessor macros like #GTK_STOCK_OK and
 831  * #GTK_STOCK_APPLY.
 832  *
 833  * If @stock_id is unknown, then it will be treated as a mnemonic
 834  * label (as for gtk_button_new_with_mnemonic()).
 835  *
 836  * Returns: a new #GtkButton
 837  **/
 838 GtkWidget*
 839 gtk_button_new_from_stock (const gchar *stock_id)
 840 {
 841   return g_object_new (GTK_TYPE_BUTTON,
 842                        "label", stock_id,
 843                        "use-stock", TRUE,
 844                        "use-underline", TRUE,
 845                        NULL);
 846 }
 847
 848 /**
 849  * gtk_button_new_with_mnemonic:
 850  * @label: The text of the button, with an underscore in front of the
 851  *         mnemonic character
 852  * @returns: a new #GtkButton
 853  *
 854  * Creates a new #GtkButton containing a label.
 855  * If characters in @label are preceded by an underscore, they are underlined.
 856  * If you need a literal underscore character in a label, use '__' (two
 857  * underscores). The first underlined character represents a keyboard
 858  * accelerator called a mnemonic.
 859  * Pressing Alt and that key activates the button.
 860  **/
 861 GtkWidget*
 862 gtk_button_new_with_mnemonic (const gchar *label)
 863 {
 864   return g_object_new (GTK_TYPE_BUTTON, "label", label, "use-underline", TRUE,  NULL);
 865 }
 866
 867 void
 868 gtk_button_pressed (GtkButton *button)
 869 {
 870   g_return_if_fail (GTK_IS_BUTTON (button));
 871
 872
 873   g_signal_emit (button, button_signals[PRESSED], 0);
 874 }
 875
 876 void
 877 gtk_button_released (GtkButton *button)
 878 {
 879   g_return_if_fail (GTK_IS_BUTTON (button));
 880
 881   g_signal_emit (button, button_signals[RELEASED], 0);
 882 }
 883
 884 void
 885 gtk_button_clicked (GtkButton *button)
 886 {
 887   g_return_if_fail (GTK_IS_BUTTON (button));
 888
 889   g_signal_emit (button, button_signals[CLICKED], 0);
 890 }
 891
 892 void
 893 gtk_button_enter (GtkButton *button)
 894 {
 895   g_return_if_fail (GTK_IS_BUTTON (button));
 896
 897   g_signal_emit (button, button_signals[ENTER], 0);
 898 }
 899
 900 void
 901 gtk_button_leave (GtkButton *button)
 902 {
 903   g_return_if_fail (GTK_IS_BUTTON (button));
 904
 905   g_signal_emit (button, button_signals[LEAVE], 0);
 906 }
 907
 908 void
 909 gtk_button_set_relief (GtkButton *button,
 910                        GtkReliefStyle newrelief)
 911 {
 912   g_return_if_fail (GTK_IS_BUTTON (button));
 913
 914   if (newrelief != button->relief)
 915     {
 916        button->relief = newrelief;
 917        g_object_notify (G_OBJECT (button), "relief");
 918        gtk_widget_queue_draw (GTK_WIDGET (button));
 919     }
 920 }
 921
 922 GtkReliefStyle
 923 gtk_button_get_relief (GtkButton *button)
 924 {
 925   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
 926
 927   return button->relief;
 928 }
 929
 930 static void
 931 gtk_button_realize (GtkWidget *widget)
 932 {
 933   GtkButton *button;
 934   GdkWindowAttr attributes;
 935   gint attributes_mask;
 936   gint border_width;
 937
 938   button = GTK_BUTTON (widget);
 939   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 940
 941   border_width = GTK_CONTAINER (widget)->border_width;
 942
 943   attributes.window_type = GDK_WINDOW_CHILD;
 944   attributes.x = widget->allocation.x + border_width;
 945   attributes.y = widget->allocation.y + border_width;
 946   attributes.width = widget->allocation.width - border_width * 2;
 947   attributes.height = widget->allocation.height - border_width * 2;
 948   attributes.wclass = GDK_INPUT_ONLY;
 949   attributes.event_mask = gtk_widget_get_events (widget);
 950   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 951                             GDK_BUTTON_RELEASE_MASK |
 952                             GDK_ENTER_NOTIFY_MASK |
 953                             GDK_LEAVE_NOTIFY_MASK);
 954
 955   attributes_mask = GDK_WA_X | GDK_WA_Y;
 956
 957   widget->window = gtk_widget_get_parent_window (widget);
 958   g_object_ref (widget->window);
 959
 960   button->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 961                                          &attributes, attributes_mask);
 962   gdk_window_set_user_data (button->event_window, button);
 963
 964   widget->style = gtk_style_attach (widget->style, widget->window);
 965 }
 966
 967 static void
 968 gtk_button_unrealize (GtkWidget *widget)
 969 {
 970   GtkButton *button = GTK_BUTTON (widget);
 971
 972   if (button->activate_timeout)
 973     gtk_button_finish_activate (button, FALSE);
 974
 975   if (button->event_window)
 976     {
 977       gdk_window_set_user_data (button->event_window, NULL);
 978       gdk_window_destroy (button->event_window);
 979       button->event_window = NULL;
 980     }
 981
 982   GTK_WIDGET_CLASS (gtk_button_parent_class)->unrealize (widget);
 983 }
 984
 985 static void
 986 gtk_button_map (GtkWidget *widget)
 987 {
 988   GtkButton *button = GTK_BUTTON (widget);
 989
 990   GTK_WIDGET_CLASS (gtk_button_parent_class)->map (widget);
 991
 992   if (button->event_window)
 993     gdk_window_show (button->event_window);
 994 }
 995
 996 static void
 997 gtk_button_unmap (GtkWidget *widget)
 998 {
 999   GtkButton *button = GTK_BUTTON (widget);
1000
1001   if (button->event_window)
1002     gdk_window_hide (button->event_window);
1003
1004   GTK_WIDGET_CLASS (gtk_button_parent_class)->unmap (widget);
1005 }
1006
1007 static void
1008 gtk_button_style_set (GtkWidget *widget,
1009                       GtkStyle  *prev_style)
1010 {
1011   gtk_button_construct_child (GTK_BUTTON (widget));
1012 }
1013
1014 static void
1015 gtk_button_get_props (GtkButton *button,
1016                       GtkBorder *default_border,
1017                       GtkBorder *default_outside_border,
1018                       GtkBorder *inner_border,
1019                       gboolean  *interior_focus)
1020 {
1021   GtkWidget *widget =  GTK_WIDGET (button);
1022   GtkBorder *tmp_border;
1023
1024   if (default_border)
1025     {
1026       gtk_widget_style_get (widget, "default-border", &tmp_border, NULL);
1027
1028       if (tmp_border)
1029         {
1030           *default_border = *tmp_border;
1031           g_free (tmp_border);
1032         }
1033       else
1034         *default_border = default_default_border;
1035     }
1036
1037   if (default_outside_border)
1038     {
1039       gtk_widget_style_get (widget, "default-outside-border", &tmp_border, NULL);
1040
1041       if (tmp_border)
1042         {
1043           *default_outside_border = *tmp_border;
1044           g_free (tmp_border);
1045         }
1046       else
1047         *default_outside_border = default_default_outside_border;
1048     }
1049
1050   if (inner_border)
1051     {
1052       gtk_widget_style_get (widget, "inner-border", &tmp_border, NULL);
1053
1054       if (tmp_border)
1055         {
1056           *inner_border = *tmp_border;
1057           g_free (tmp_border);
1058         }
1059       else
1060         *inner_border = default_inner_border;
1061     }
1062
1063   if (interior_focus)
1064     gtk_widget_style_get (widget, "interior-focus", interior_focus, NULL);
1065 }
1066
1067 static void
1068 gtk_button_size_request (GtkWidget      *widget,
1069                          GtkRequisition *requisition)
1070 {
1071   GtkButton *button = GTK_BUTTON (widget);
1072   GtkBorder default_border;
1073   GtkBorder inner_border;
1074   gint focus_width;
1075   gint focus_pad;
1076
1077   gtk_button_get_props (button, &default_border, NULL, &inner_border, NULL);
1078   gtk_widget_style_get (GTK_WIDGET (widget),
1079                         "focus-line-width", &focus_width,
1080                         "focus-padding", &focus_pad,
1081                         NULL);
1082
1083   requisition->width = ((GTK_CONTAINER (widget)->border_width +
1084                          GTK_WIDGET (widget)->style->xthickness) * 2 +
1085                         inner_border.left + inner_border.right);
1086   requisition->height = ((GTK_CONTAINER (widget)->border_width +
1087                           GTK_WIDGET (widget)->style->ythickness) * 2 +
1088                          inner_border.top + inner_border.bottom);
1089
1090   if (GTK_WIDGET_CAN_DEFAULT (widget))
1091     {
1092       requisition->width += default_border.left + default_border.right;
1093       requisition->height += default_border.top + default_border.bottom;
1094     }
1095
1096   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
1097     {
1098       GtkRequisition child_requisition;
1099
1100       gtk_widget_size_request (GTK_BIN (button)->child, &child_requisition);
1101
1102       requisition->width += child_requisition.width;
1103       requisition->height += child_requisition.height;
1104     }
1105
1106   requisition->width += 2 * (focus_width + focus_pad);
1107   requisition->height += 2 * (focus_width + focus_pad);
1108 }
1109
1110 static void
1111 gtk_button_size_allocate (GtkWidget     *widget,
1112                           GtkAllocation *allocation)
1113 {
1114   GtkButton *button = GTK_BUTTON (widget);
1115   GtkAllocation child_allocation;
1116
1117   gint border_width = GTK_CONTAINER (widget)->border_width;
1118   gint xthickness = GTK_WIDGET (widget)->style->xthickness;
1119   gint ythickness = GTK_WIDGET (widget)->style->ythickness;
1120   GtkBorder default_border;
1121   GtkBorder inner_border;
1122   gint focus_width;
1123   gint focus_pad;
1124
1125   gtk_button_get_props (button, &default_border, NULL, &inner_border, NULL);
1126   gtk_widget_style_get (GTK_WIDGET (widget),
1127                         "focus-line-width", &focus_width,
1128                         "focus-padding", &focus_pad,
1129                         NULL);
1130
1131
1132   widget->allocation = *allocation;
1133
1134   if (GTK_WIDGET_REALIZED (widget))
1135     gdk_window_move_resize (button->event_window,
1136                             widget->allocation.x + border_width,
1137                             widget->allocation.y + border_width,
1138                             widget->allocation.width - border_width * 2,
1139                             widget->allocation.height - border_width * 2);
1140
1141   if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
1142     {
1143       child_allocation.x = widget->allocation.x + border_width + inner_border.left + xthickness;
1144       child_allocation.y = widget->allocation.y + border_width + inner_border.top + ythickness;
1145
1146       child_allocation.width = MAX (1, widget->allocation.width -
1147                                     xthickness * 2 -
1148                                     inner_border.left -
1149                                     inner_border.right -
1150                                     border_width * 2);
1151       child_allocation.height = MAX (1, widget->allocation.height -
1152                                      ythickness * 2 -
1153                                      inner_border.top -
1154                                      inner_border.bottom -
1155                                      border_width * 2);
1156
1157       if (GTK_WIDGET_CAN_DEFAULT (button))
1158         {
1159           child_allocation.x += default_border.left;
1160           child_allocation.y += default_border.top;
1161           child_allocation.width =  MAX (1, child_allocation.width - default_border.left - default_border.right);
1162           child_allocation.height = MAX (1, child_allocation.height - default_border.top - default_border.bottom);
1163         }
1164
1165       if (GTK_WIDGET_CAN_FOCUS (button))
1166         {
1167           child_allocation.x += focus_width + focus_pad;
1168           child_allocation.y += focus_width + focus_pad;
1169           child_allocation.width =  MAX (1, child_allocation.width - (focus_width + focus_pad) * 2);
1170           child_allocation.height = MAX (1, child_allocation.height - (focus_width + focus_pad) * 2);
1171         }
1172
1173       if (button->depressed)
1174         {
1175           gint child_displacement_x;
1176           gint child_displacement_y;
1177
1178           gtk_widget_style_get (widget,
1179                                 "child-displacement-x", &child_displacement_x,
1180                                 "child-displacement-y", &child_displacement_y,
1181                                 NULL);
1182           child_allocation.x += child_displacement_x;
1183           child_allocation.y += child_displacement_y;
1184         }
1185
1186       gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
1187     }
1188 }
1189
1190 void
1191 _gtk_button_paint (GtkButton    *button,
1192                    GdkRectangle *area,
1193                    GtkStateType  state_type,
1194                    GtkShadowType shadow_type,
1195                    const gchar  *main_detail,
1196                    const gchar  *default_detail)
1197 {
1198   GtkWidget *widget;
1199   gint width, height;
1200   gint x, y;
1201   gint border_width;
1202   GtkBorder default_border;
1203   GtkBorder default_outside_border;
1204   gboolean interior_focus;
1205   gint focus_width;
1206   gint focus_pad;
1207
1208   if (GTK_WIDGET_DRAWABLE (button))
1209     {
1210       widget = GTK_WIDGET (button);
1211       border_width = GTK_CONTAINER (widget)->border_width;
1212
1213       gtk_button_get_props (button, &default_border, &default_outside_border, NULL, &interior_focus);
1214       gtk_widget_style_get (GTK_WIDGET (widget),
1215                             "focus-line-width", &focus_width,
1216                             "focus-padding", &focus_pad,
1217                             NULL);
1218
1219       x = widget->allocation.x + border_width;
1220       y = widget->allocation.y + border_width;
1221       width = widget->allocation.width - border_width * 2;
1222       height = widget->allocation.height - border_width * 2;
1223
1224       if (GTK_WIDGET_HAS_DEFAULT (widget) &&
1225           GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
1226         {
1227           gtk_paint_box (widget->style, widget->window,
1228                          GTK_STATE_NORMAL, GTK_SHADOW_IN,
1229                          area, widget, "buttondefault",
1230                          x, y, width, height);
1231
1232           x += default_border.left;
1233           y += default_border.top;
1234           width -= default_border.left + default_border.right;
1235           height -= default_border.top + default_border.bottom;
1236         }
1237       else if (GTK_WIDGET_CAN_DEFAULT (widget))
1238         {
1239           x += default_outside_border.left;
1240           y += default_outside_border.top;
1241           width -= default_outside_border.left + default_outside_border.right;
1242           height -= default_outside_border.top + default_outside_border.bottom;
1243         }
1244
1245       if (!interior_focus && GTK_WIDGET_HAS_FOCUS (widget))
1246         {
1247           x += focus_width + focus_pad;
1248           y += focus_width + focus_pad;
1249           width -= 2 * (focus_width + focus_pad);
1250           height -= 2 * (focus_width + focus_pad);
1251         }
1252
1253       if (button->relief != GTK_RELIEF_NONE || button->depressed ||
1254           GTK_WIDGET_STATE(widget) == GTK_STATE_PRELIGHT)
1255         gtk_paint_box (widget->style, widget->window,
1256                        state_type,
1257                        shadow_type, area, widget, "button",
1258                        x, y, width, height);
1259
1260       if (GTK_WIDGET_HAS_FOCUS (widget))
1261         {
1262           gint child_displacement_x;
1263           gint child_displacement_y;
1264           gboolean displace_focus;
1265
1266           gtk_widget_style_get (GTK_WIDGET (widget),
1267                                 "child-displacement-y", &child_displacement_y,
1268                                 "child-displacement-x", &child_displacement_x,
1269                                 "displace-focus", &displace_focus,
1270                                 NULL);
1271
1272           if (interior_focus)
1273             {
1274               x += widget->style->xthickness + focus_pad;
1275               y += widget->style->ythickness + focus_pad;
1276               width -= 2 * (widget->style->xthickness + focus_pad);
1277               height -=  2 * (widget->style->ythickness + focus_pad);
1278             }
1279           else
1280             {
1281               x -= focus_width + focus_pad;
1282               y -= focus_width + focus_pad;
1283               width += 2 * (focus_width + focus_pad);
1284               height += 2 * (focus_width + focus_pad);
1285             }
1286
1287           if (button->depressed && displace_focus)
1288             {
1289               x += child_displacement_x;
1290               y += child_displacement_y;
1291             }
1292
1293           gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
1294                            area, widget, "button",
1295                            x, y, width, height);
1296         }
1297     }
1298 }
1299
1300 static gboolean
1301 gtk_button_expose (GtkWidget      *widget,
1302                    GdkEventExpose *event)
1303 {
1304   if (GTK_WIDGET_DRAWABLE (widget))
1305     {
1306       GtkButton *button = GTK_BUTTON (widget);
1307
1308       _gtk_button_paint (button, &event->area,
1309                          GTK_WIDGET_STATE (widget),
1310                          button->depressed ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
1311                          "button", "buttondefault");
1312
1313       (* GTK_WIDGET_CLASS (gtk_button_parent_class)->expose_event) (widget, event);
1314     }
1315
1316   return FALSE;
1317 }
1318
1319 static gboolean
1320 gtk_button_button_press (GtkWidget      *widget,
1321                          GdkEventButton *event)
1322 {
1323   GtkButton *button;
1324
1325   if (event->type == GDK_BUTTON_PRESS)
1326     {
1327       button = GTK_BUTTON (widget);
1328
1329       if (button->focus_on_click && !GTK_WIDGET_HAS_FOCUS (widget))
1330         gtk_widget_grab_focus (widget);
1331
1332       if (event->button == 1)
1333         gtk_button_pressed (button);
1334     }
1335
1336   return TRUE;
1337 }
1338
1339 static gboolean
1340 gtk_button_button_release (GtkWidget      *widget,
1341                            GdkEventButton *event)
1342 {
1343   GtkButton *button;
1344
1345   if (event->button == 1)
1346     {
1347       button = GTK_BUTTON (widget);
1348       gtk_button_released (button);
1349     }
1350
1351   return TRUE;
1352 }
1353
1354 static gboolean
1355 gtk_button_grab_broken (GtkWidget          *widget,
1356                         GdkEventGrabBroken *event)
1357 {
1358   GtkButton *button = GTK_BUTTON (widget);
1359   gboolean save_in;
1360
1361   /* Simulate a button release without the pointer in the button */
1362   if (button->button_down)
1363     {
1364       save_in = button->in_button;
1365       button->in_button = FALSE;
1366       gtk_button_released (button);
1367       if (save_in != button->in_button)
1368         {
1369           button->in_button = save_in;
1370           gtk_button_update_state (button);
1371         }
1372     }
1373
1374   return TRUE;
1375 }
1376
1377 static gboolean
1378 gtk_button_key_release (GtkWidget   *widget,
1379                         GdkEventKey *event)
1380 {
1381   GtkButton *button = GTK_BUTTON (widget);
1382
1383   if (button->activate_timeout)
1384     {
1385       gtk_button_finish_activate (button, TRUE);
1386       return TRUE;
1387     }
1388   else if (GTK_WIDGET_CLASS (gtk_button_parent_class)->key_release_event)
1389     return GTK_WIDGET_CLASS (gtk_button_parent_class)->key_release_event (widget, event);
1390   else
1391     return FALSE;
1392 }
1393
1394 static gboolean
1395 gtk_button_enter_notify (GtkWidget        *widget,
1396                          GdkEventCrossing *event)
1397 {
1398   GtkButton *button;
1399   GtkWidget *event_widget;
1400
1401   button = GTK_BUTTON (widget);
1402   event_widget = gtk_get_event_widget ((GdkEvent*) event);
1403
1404   if ((event_widget == widget) &&
1405       (event->detail != GDK_NOTIFY_INFERIOR))
1406     {
1407       button->in_button = TRUE;
1408       gtk_button_enter (button);
1409     }
1410
1411   return FALSE;
1412 }
1413
1414 static gboolean
1415 gtk_button_leave_notify (GtkWidget        *widget,
1416                          GdkEventCrossing *event)
1417 {
1418   GtkButton *button;
1419   GtkWidget *event_widget;
1420
1421   button = GTK_BUTTON (widget);
1422   event_widget = gtk_get_event_widget ((GdkEvent*) event);
1423
1424   if ((event_widget == widget) &&
1425       (event->detail != GDK_NOTIFY_INFERIOR))
1426     {
1427       button->in_button = FALSE;
1428       gtk_button_leave (button);
1429     }
1430
1431   return FALSE;
1432 }
1433
1434 static void
1435 gtk_real_button_pressed (GtkButton *button)
1436 {
1437   if (button->activate_timeout)
1438     return;
1439
1440   button->button_down = TRUE;
1441   gtk_button_update_state (button);
1442 }
1443
1444 static void
1445 gtk_real_button_released (GtkButton *button)
1446 {
1447   if (button->button_down)
1448     {
1449       button->button_down = FALSE;
1450
1451       if (button->activate_timeout)
1452         return;
1453
1454       if (button->in_button)
1455         gtk_button_clicked (button);
1456
1457       gtk_button_update_state (button);
1458     }
1459 }
1460
1461 static gboolean
1462 button_activate_timeout (gpointer data)
1463 {
1464   GDK_THREADS_ENTER ();
1465
1466   gtk_button_finish_activate (data, TRUE);
1467
1468   GDK_THREADS_LEAVE ();
1469
1470   return FALSE;
1471 }
1472
1473 static void
1474 gtk_real_button_activate (GtkButton *button)
1475 {
1476   GtkWidget *widget = GTK_WIDGET (button);
1477   GtkButtonPrivate *priv;
1478   guint32 time;
1479
1480   priv = GTK_BUTTON_GET_PRIVATE (button);
1481
1482   if (GTK_WIDGET_REALIZED (button) && !button->activate_timeout)
1483     {
1484       time = gtk_get_current_event_time ();
1485       if (gdk_keyboard_grab (button->event_window, TRUE, time) ==
1486           GDK_GRAB_SUCCESS)
1487         {
1488           priv->has_grab = TRUE;
1489           priv->grab_time = time;
1490         }
1491
1492       gtk_grab_add (widget);
1493
1494       button->activate_timeout = g_timeout_add (ACTIVATE_TIMEOUT,
1495                                                 button_activate_timeout,
1496                                                 button);
1497       button->button_down = TRUE;
1498       gtk_button_update_state (button);
1499       gtk_widget_queue_draw (GTK_WIDGET (button));
1500     }
1501 }
1502
1503 static void
1504 gtk_button_finish_activate (GtkButton *button,
1505                             gboolean   do_it)
1506 {
1507   GtkWidget *widget = GTK_WIDGET (button);
1508   GtkButtonPrivate *priv;
1509
1510   priv = GTK_BUTTON_GET_PRIVATE (button);
1511
1512   g_source_remove (button->activate_timeout);
1513   button->activate_timeout = 0;
1514
1515   if (priv->has_grab)
1516     {
1517       gdk_display_keyboard_ungrab (gtk_widget_get_display (widget),
1518                                    priv->grab_time);
1519     }
1520   gtk_grab_remove (widget);
1521
1522   button->button_down = FALSE;
1523
1524   gtk_button_update_state (button);
1525   gtk_widget_queue_draw (GTK_WIDGET (button));
1526
1527   if (do_it)
1528     gtk_button_clicked (button);
1529 }
1530
1531 /**
1532  * gtk_button_set_label:
1533  * @button: a #GtkButton
1534  * @label: a string
1535  *
1536  * Sets the text of the label of the button to @str. This text is
1537  * also used to select the stock item if gtk_button_set_use_stock()
1538  * is used.
1539  *
1540  * This will also clear any previously set labels.
1541  **/
1542 void
1543 gtk_button_set_label (GtkButton   *button,
1544                       const gchar *label)
1545 {
1546   gchar *new_label;
1547
1548   g_return_if_fail (GTK_IS_BUTTON (button));
1549
1550   new_label = g_strdup (label);
1551   g_free (button->label_text);
1552   button->label_text = new_label;
1553
1554   gtk_button_construct_child (button);
1555
1556   g_object_notify (G_OBJECT (button), "label");
1557 }
1558
1559 /**
1560  * gtk_button_get_label:
1561  * @button: a #GtkButton
1562  *
1563  * Fetches the text from the label of the button, as set by
1564  * gtk_button_set_label(). If the label text has not
1565  * been set the return value will be %NULL. This will be the
1566  * case if you create an empty button with gtk_button_new() to
1567  * use as a container.
1568  *
1569  * Return value: The text of the label widget. This string is owned
1570  * by the widget and must not be modified or freed.
1571  **/
1572 G_CONST_RETURN gchar *
1573 gtk_button_get_label (GtkButton *button)
1574 {
1575   g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
1576
1577   return button->label_text;
1578 }
1579
1580 /**
1581  * gtk_button_set_use_underline:
1582  * @button: a #GtkButton
1583  * @use_underline: %TRUE if underlines in the text indicate mnemonics
1584  *
1585  * If true, an underline in the text of the button label indicates
1586  * the next character should be used for the mnemonic accelerator key.
1587  */
1588 void
1589 gtk_button_set_use_underline (GtkButton *button,
1590                               gboolean   use_underline)
1591 {
1592   g_return_if_fail (GTK_IS_BUTTON (button));
1593
1594   use_underline = use_underline != FALSE;
1595
1596   if (use_underline != button->use_underline)
1597     {
1598       button->use_underline = use_underline;
1599
1600       gtk_button_construct_child (button);
1601
1602       g_object_notify (G_OBJECT (button), "use-underline");
1603     }
1604 }
1605
1606 /**
1607  * gtk_button_get_use_underline:
1608  * @button: a #GtkButton
1609  *
1610  * Returns whether an embedded underline in the button label indicates a
1611  * mnemonic. See gtk_button_set_use_underline ().
1612  *
1613  * Return value: %TRUE if an embedded underline in the button label
1614  *               indicates the mnemonic accelerator keys.
1615  **/
1616 gboolean
1617 gtk_button_get_use_underline (GtkButton *button)
1618 {
1619   g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
1620
1621   return button->use_underline;
1622 }
1623
1624 /**
1625  * gtk_button_set_use_stock:
1626  * @button: a #GtkButton
1627  * @use_stock: %TRUE if the button should use a stock item
1628  *
1629  * If true, the label set on the button is used as a
1630  * stock id to select the stock item for the button.
1631  */
1632 void
1633 gtk_button_set_use_stock (GtkButton *button,
1634                           gboolean   use_stock)
1635 {
1636   g_return_if_fail (GTK_IS_BUTTON (button));
1637
1638   use_stock = use_stock != FALSE;
1639
1640   if (use_stock != button->use_stock)
1641     {
1642       button->use_stock = use_stock;
1643
1644       gtk_button_construct_child (button);
1645
1646       g_object_notify (G_OBJECT (button), "use-stock");
1647     }
1648 }
1649
1650 /**
1651  * gtk_button_get_use_stock:
1652  * @button: a #GtkButton
1653  *
1654  * Returns whether the button label is a stock item.
1655  *
1656  * Return value: %TRUE if the button label is used to
1657  *               select a stock item instead of being
1658  *               used directly as the label text.
1659  */
1660 gboolean
1661 gtk_button_get_use_stock (GtkButton *button)
1662 {
1663   g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
1664
1665   return button->use_stock;
1666 }
1667
1668 /**
1669  * gtk_button_set_focus_on_click:
1670  * @button: a #GtkButton
1671  * @focus_on_click: whether the button grabs focus when clicked with the mouse
1672  *
1673  * Sets whether the button will grab focus when it is clicked with the mouse.
1674  * Making mouse clicks not grab focus is useful in places like toolbars where
1675  * you don't want the keyboard focus removed from the main area of the
1676  * application.
1677  *
1678  * Since: 2.4
1679  **/
1680 void
1681 gtk_button_set_focus_on_click (GtkButton *button,
1682                                gboolean   focus_on_click)
1683 {
1684   g_return_if_fail (GTK_IS_BUTTON (button));
1685
1686   focus_on_click = focus_on_click != FALSE;
1687
1688   if (button->focus_on_click != focus_on_click)
1689     {
1690       button->focus_on_click = focus_on_click;
1691
1692       g_object_notify (G_OBJECT (button), "focus-on-click");
1693     }
1694 }
1695
1696 /**
1697  * gtk_button_get_focus_on_click:
1698  * @button: a #GtkButton
1699  *
1700  * Returns whether the button grabs focus when it is clicked with the mouse.
1701  * See gtk_button_set_focus_on_click().
1702  *
1703  * Return value: %TRUE if the button grabs focus when it is clicked with
1704  *               the mouse.
1705  *
1706  * Since: 2.4
1707  **/
1708 gboolean
1709 gtk_button_get_focus_on_click (GtkButton *button)
1710 {
1711   g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
1712
1713   return button->focus_on_click;
1714 }
1715
1716 /**
1717  * gtk_button_set_alignment:
1718  * @button: a #GtkButton
1719  * @xalign: the horizontal position of the child, 0.0 is left aligned,
1720  *   1.0 is right aligned
1721  * @yalign: the vertical position of the child, 0.0 is top aligned,
1722  *   1.0 is bottom aligned
1723  *
1724  * Sets the alignment of the child. This property has no effect unless
1725  * the child is a #GtkMisc or a #GtkAligment.
1726  *
1727  * Since: 2.4
1728  */
1729 void
1730 gtk_button_set_alignment (GtkButton *button,
1731                           gfloat     xalign,
1732                           gfloat     yalign)
1733 {
1734   GtkButtonPrivate *priv;
1735
1736   g_return_if_fail (GTK_IS_BUTTON (button));
1737
1738   priv = GTK_BUTTON_GET_PRIVATE (button);
1739
1740   priv->xalign = xalign;
1741   priv->yalign = yalign;
1742   priv->align_set = 1;
1743
1744   maybe_set_alignment (button, GTK_BIN (button)->child);
1745
1746   g_object_freeze_notify (G_OBJECT (button));
1747   g_object_notify (G_OBJECT (button), "xalign");
1748   g_object_notify (G_OBJECT (button), "yalign");
1749   g_object_thaw_notify (G_OBJECT (button));
1750 }
1751
1752 /**
1753  * gtk_button_get_alignment:
1754  * @button: a #GtkButton
1755  * @xalign: return location for horizontal alignment
1756  * @yalign: return location for vertical alignment
1757  *
1758  * Gets the alignment of the child in the button.
1759  *
1760  * Since: 2.4
1761  */
1762 void
1763 gtk_button_get_alignment (GtkButton *button,
1764                           gfloat    *xalign,
1765                           gfloat    *yalign)
1766 {
1767   GtkButtonPrivate *priv;
1768
1769   g_return_if_fail (GTK_IS_BUTTON (button));
1770
1771   priv = GTK_BUTTON_GET_PRIVATE (button);
1772
1773   if (xalign)
1774     *xalign = priv->xalign;
1775
1776   if (yalign)
1777     *yalign = priv->yalign;
1778 }
1779
1780 /**
1781  * _gtk_button_set_depressed:
1782  * @button: a #GtkButton
1783  * @depressed: %TRUE if the button should be drawn with a recessed shadow.
1784  *
1785  * Sets whether the button is currently drawn as down or not. This is
1786  * purely a visual setting, and is meant only for use by derived widgets
1787  * such as #GtkToggleButton.
1788  **/
1789 void
1790 _gtk_button_set_depressed (GtkButton *button,
1791                            gboolean   depressed)
1792 {
1793   GtkWidget *widget = GTK_WIDGET (button);
1794
1795   depressed = depressed != FALSE;
1796
1797   if (depressed != button->depressed)
1798     {
1799       button->depressed = depressed;
1800       gtk_widget_queue_resize (widget);
1801     }
1802 }
1803
1804 static void
1805 gtk_button_update_state (GtkButton *button)
1806 {
1807   gboolean depressed;
1808   GtkStateType new_state;
1809
1810   if (button->activate_timeout)
1811     depressed = button->depress_on_activate;
1812   else
1813     depressed = button->in_button && button->button_down;
1814
1815   if (button->in_button && (!button->button_down || !depressed))
1816     new_state = GTK_STATE_PRELIGHT;
1817   else
1818     new_state = depressed ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL;
1819
1820   _gtk_button_set_depressed (button, depressed);
1821   gtk_widget_set_state (GTK_WIDGET (button), new_state);
1822 }
1823
1824 static void
1825 show_image_change_notify (GtkButton *button)
1826 {
1827   GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
1828
1829   if (priv->image)
1830     {
1831       if (show_image (button))
1832         gtk_widget_show (priv->image);
1833       else
1834         gtk_widget_hide (priv->image);
1835     }
1836 }
1837
1838 static void
1839 traverse_container (GtkWidget *widget,
1840                     gpointer   data)
1841 {
1842   if (GTK_IS_BUTTON (widget))
1843     show_image_change_notify (GTK_BUTTON (widget));
1844   else if (GTK_IS_CONTAINER (widget))
1845     gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
1846 }
1847
1848 static void
1849 gtk_button_setting_changed (GtkSettings *settings)
1850 {
1851   GList *list, *l;
1852
1853   list = gtk_window_list_toplevels ();
1854
1855   for (l = list; l; l = l->next)
1856     gtk_container_forall (GTK_CONTAINER (l->data),
1857                           traverse_container, NULL);
1858
1859   g_list_free (list);
1860 }
1861
1862
1863 static void
1864 gtk_button_screen_changed (GtkWidget *widget,
1865                            GdkScreen *previous_screen)
1866 {
1867   GtkSettings *settings;
1868   guint show_image_connection;
1869
1870   if (!gtk_widget_has_screen (widget))
1871     return;
1872
1873   settings = gtk_widget_get_settings (widget);
1874
1875   show_image_connection =
1876     GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings),
1877                                          "gtk-button-connection"));
1878
1879   if (show_image_connection)
1880     return;
1881
1882   show_image_connection =
1883     g_signal_connect (settings, "notify::gtk-button-images",
1884                       G_CALLBACK (gtk_button_setting_changed), 0);
1885   g_object_set_data (G_OBJECT (settings),
1886                      I_("gtk-button-connection"),
1887                      GUINT_TO_POINTER (show_image_connection));
1888
1889   show_image_change_notify (GTK_BUTTON (widget));
1890 }
1891
1892 static void
1893 gtk_button_state_changed (GtkWidget    *widget,
1894                           GtkStateType  previous_state)
1895 {
1896   GtkButton *button = GTK_BUTTON (widget);
1897
1898   if (!GTK_WIDGET_IS_SENSITIVE (widget))
1899     {
1900       button->in_button = FALSE;
1901       gtk_real_button_released (button);
1902     }
1903 }
1904
1905 static void
1906 gtk_button_grab_notify (GtkWidget *widget,
1907                         gboolean   was_grabbed)
1908 {
1909   GtkButton *button = GTK_BUTTON (widget);
1910
1911   if (!was_grabbed)
1912     {
1913       button->in_button = FALSE;
1914       gtk_real_button_released (button);
1915     }
1916 }
1917
1918 /**
1919  * gtk_button_set_image:
1920  * @button: a #GtkButton
1921  * @image: a widget to set as the image for the button
1922  *
1923  * Set the image of @button to the given widget. Note that
1924  * it depends on the gtk-button-images setting whether the
1925  * image will be displayed or not, you don't have to call
1926  * gtk_widget_show() on @image yourself.
1927  *
1928  * Since: 2.6
1929  */
1930 void
1931 gtk_button_set_image (GtkButton *button,
1932                       GtkWidget *image)
1933 {
1934   GtkButtonPrivate *priv;
1935
1936   g_return_if_fail (GTK_IS_BUTTON (button));
1937   g_return_if_fail (image == NULL || GTK_IS_WIDGET (image));
1938
1939   priv = GTK_BUTTON_GET_PRIVATE (button);
1940
1941   priv->image = image;
1942   priv->image_is_stock = (image == NULL);
1943
1944   gtk_button_construct_child (button);
1945
1946   g_object_notify (G_OBJECT (button), "image");
1947 }
1948
1949 /**
1950  * gtk_button_get_image:
1951  * @button: a #GtkButton
1952  *
1953  * Gets the widget that is currenty set as the image of @button.
1954  * This may have been explicitly set by gtk_button_set_image()
1955  * or constructed by gtk_button_new_from_stock().
1956  *
1957  * Return value: a #GtkWidget or %NULL in case there is no image
1958  *
1959  * Since: 2.6
1960  */
1961 GtkWidget *
1962 gtk_button_get_image (GtkButton *button)
1963 {
1964   GtkButtonPrivate *priv;
1965
1966   g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
1967
1968   priv = GTK_BUTTON_GET_PRIVATE (button);
1969
1970   return priv->image;
1971 }
1972
1973 /**
1974  * gtk_button_set_image_position:
1975  * @button: a #GtkButton
1976  * @position: the position
1977  *
1978  * Sets the position of the image relative to the text
1979  * inside the button.
1980  *
1981  * Since: 2.10
1982  */
1983 void
1984 gtk_button_set_image_position (GtkButton       *button,
1985                                GtkPositionType  position)
1986 {
1987
1988   GtkButtonPrivate *priv;
1989
1990   g_return_if_fail (GTK_IS_BUTTON (button));
1991   g_return_if_fail (position >= GTK_POS_LEFT && position <= GTK_POS_BOTTOM);
1992
1993   priv = GTK_BUTTON_GET_PRIVATE (button);
1994
1995   if (priv->image_position != position)
1996     {
1997       priv->image_position = position;
1998
1999       gtk_button_construct_child (button);
2000
2001       g_object_notify (G_OBJECT (button), "image-position");
2002     }
2003 }
2004
2005 /**
2006  * gtk_button_get_image_position:
2007  * @button: a #GtkButton
2008  *
2009  * Gets the position of the image relative to the text
2010  * inside the button.
2011  *
2012  * Return value: the position
2013  *
2014  * Since: 2.10
2015  */
2016 GtkPositionType
2017 gtk_button_get_image_position (GtkButton *button)
2018 {
2019   GtkButtonPrivate *priv;
2020
2021   g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_POS_LEFT);
2022
2023   priv = GTK_BUTTON_GET_PRIVATE (button);
2024
2025   return priv->image_position;
2026 }
2027
2028
2029 #define __GTK_BUTTON_C__
2030 #include "gtkaliasdef.c"