Pileus Git - ~andy/gtk/blob - gtk/gtkspinbutton.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * GtkSpinButton widget for GTK+
   5  * Copyright (C) 1998 Lars Hamann and Stefan Jeske
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  25  * file for a list of people on the GTK+ Team.  See the ChangeLog
  26  * files for a list of changes.  These files are distributed with
  27  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  28  */
  29
  30 #include "config.h"
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <math.h>
  34 #include <string.h>
  35 #include <locale.h>
  36 #include "gdk/gdkkeysyms.h"
  37 #include "gtkbindings.h"
  38 #include "gtkspinbutton.h"
  39 #include "gtkentryprivate.h"
  40 #include "gtkmain.h"
  41 #include "gtkmarshalers.h"
  42 #include "gtksettings.h"
  43 #include "gtkprivate.h"
  44 #include "gtkintl.h"
  45 #include "gtkalias.h"
  46
  47 #define MIN_SPIN_BUTTON_WIDTH 30
  48 #define MAX_TIMER_CALLS       5
  49 #define EPSILON               1e-10
  50 #define MAX_DIGITS            20
  51 #define MIN_ARROW_WIDTH       6
  52
  53 enum {
  54   PROP_0,
  55   PROP_ADJUSTMENT,
  56   PROP_CLIMB_RATE,
  57   PROP_DIGITS,
  58   PROP_SNAP_TO_TICKS,
  59   PROP_NUMERIC,
  60   PROP_WRAP,
  61   PROP_UPDATE_POLICY,
  62   PROP_VALUE
  63 };
  64
  65 /* Signals */
  66 enum
  67 {
  68   INPUT,
  69   OUTPUT,
  70   VALUE_CHANGED,
  71   CHANGE_VALUE,
  72   WRAPPED,
  73   LAST_SIGNAL
  74 };
  75
  76 static void gtk_spin_button_editable_init  (GtkEditableClass   *iface);
  77 static void gtk_spin_button_finalize       (GObject            *object);
  78 static void gtk_spin_button_destroy        (GtkObject          *object);
  79 static void gtk_spin_button_set_property   (GObject         *object,
  80                                             guint            prop_id,
  81                                             const GValue    *value,
  82                                             GParamSpec      *pspec);
  83 static void gtk_spin_button_get_property   (GObject         *object,
  84                                             guint            prop_id,
  85                                             GValue          *value,
  86                                             GParamSpec      *pspec);
  87 static void gtk_spin_button_map            (GtkWidget          *widget);
  88 static void gtk_spin_button_unmap          (GtkWidget          *widget);
  89 static void gtk_spin_button_realize        (GtkWidget          *widget);
  90 static void gtk_spin_button_unrealize      (GtkWidget          *widget);
  91 static void gtk_spin_button_size_request   (GtkWidget          *widget,
  92                                             GtkRequisition     *requisition);
  93 static void gtk_spin_button_size_allocate  (GtkWidget          *widget,
  94                                             GtkAllocation      *allocation);
  95 static gint gtk_spin_button_expose         (GtkWidget          *widget,
  96                                             GdkEventExpose     *event);
  97 static gint gtk_spin_button_button_press   (GtkWidget          *widget,
  98                                             GdkEventButton     *event);
  99 static gint gtk_spin_button_button_release (GtkWidget          *widget,
 100                                             GdkEventButton     *event);
 101 static gint gtk_spin_button_motion_notify  (GtkWidget          *widget,
 102                                             GdkEventMotion     *event);
 103 static gint gtk_spin_button_enter_notify   (GtkWidget          *widget,
 104                                             GdkEventCrossing   *event);
 105 static gint gtk_spin_button_leave_notify   (GtkWidget          *widget,
 106                                             GdkEventCrossing   *event);
 107 static gint gtk_spin_button_focus_out      (GtkWidget          *widget,
 108                                             GdkEventFocus      *event);
 109 static void gtk_spin_button_grab_notify    (GtkWidget          *widget,
 110                                             gboolean            was_grabbed);
 111 static void gtk_spin_button_state_changed  (GtkWidget          *widget,
 112                                             GtkStateType        previous_state);
 113 static void gtk_spin_button_style_set      (GtkWidget          *widget,
 114                                             GtkStyle           *previous_style);
 115 static void gtk_spin_button_draw_arrow     (GtkSpinButton      *spin_button,
 116                                             GdkRectangle       *area,
 117                                             GtkArrowType        arrow_type);
 118 static gboolean gtk_spin_button_timer          (GtkSpinButton      *spin_button);
 119 static void gtk_spin_button_stop_spinning  (GtkSpinButton      *spin);
 120 static void gtk_spin_button_value_changed  (GtkAdjustment      *adjustment,
 121                                             GtkSpinButton      *spin_button);
 122 static gint gtk_spin_button_key_release    (GtkWidget          *widget,
 123                                             GdkEventKey        *event);
 124 static gint gtk_spin_button_scroll         (GtkWidget          *widget,
 125                                             GdkEventScroll     *event);
 126 static void gtk_spin_button_activate       (GtkEntry           *entry);
 127 static void gtk_spin_button_get_text_area_size (GtkEntry *entry,
 128                                                 gint     *x,
 129                                                 gint     *y,
 130                                                 gint     *width,
 131                                                 gint     *height);
 132 static void gtk_spin_button_snap           (GtkSpinButton      *spin_button,
 133                                             gdouble             val);
 134 static void gtk_spin_button_insert_text    (GtkEditable        *editable,
 135                                             const gchar        *new_text,
 136                                             gint                new_text_length,
 137                                             gint               *position);
 138 static void gtk_spin_button_real_spin      (GtkSpinButton      *spin_button,
 139                                             gdouble             step);
 140 static void gtk_spin_button_real_change_value (GtkSpinButton   *spin,
 141                                                GtkScrollType    scroll);
 142
 143 static gint gtk_spin_button_default_input  (GtkSpinButton      *spin_button,
 144                                             gdouble            *new_val);
 145 static gint gtk_spin_button_default_output (GtkSpinButton      *spin_button);
 146
 147 static gint spin_button_get_arrow_size     (GtkSpinButton      *spin_button);
 148 static gint spin_button_get_shadow_type    (GtkSpinButton      *spin_button);
 149
 150 static guint spinbutton_signals[LAST_SIGNAL] = {0};
 151
 152 #define NO_ARROW 2
 153
 154 G_DEFINE_TYPE_WITH_CODE (GtkSpinButton, gtk_spin_button, GTK_TYPE_ENTRY,
 155                          G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
 156                                                 gtk_spin_button_editable_init))
 157
 158 #define add_spin_binding(binding_set, keyval, mask, scroll)            \
 159   gtk_binding_entry_add_signal (binding_set, keyval, mask,             \
 160                                 "change_value", 1,                     \
 161                                 GTK_TYPE_SCROLL_TYPE, scroll)
 162
 163 static void
 164 gtk_spin_button_class_init (GtkSpinButtonClass *class)
 165 {
 166   GObjectClass     *gobject_class = G_OBJECT_CLASS (class);
 167   GtkObjectClass   *object_class = GTK_OBJECT_CLASS (class);
 168   GtkWidgetClass   *widget_class = GTK_WIDGET_CLASS (class);
 169   GtkEntryClass    *entry_class = GTK_ENTRY_CLASS (class);
 170   GtkBindingSet    *binding_set;
 171
 172   gobject_class->finalize = gtk_spin_button_finalize;
 173
 174   gobject_class->set_property = gtk_spin_button_set_property;
 175   gobject_class->get_property = gtk_spin_button_get_property;
 176
 177   object_class->destroy = gtk_spin_button_destroy;
 178
 179   widget_class->map = gtk_spin_button_map;
 180   widget_class->unmap = gtk_spin_button_unmap;
 181   widget_class->realize = gtk_spin_button_realize;
 182   widget_class->unrealize = gtk_spin_button_unrealize;
 183   widget_class->size_request = gtk_spin_button_size_request;
 184   widget_class->size_allocate = gtk_spin_button_size_allocate;
 185   widget_class->expose_event = gtk_spin_button_expose;
 186   widget_class->scroll_event = gtk_spin_button_scroll;
 187   widget_class->button_press_event = gtk_spin_button_button_press;
 188   widget_class->button_release_event = gtk_spin_button_button_release;
 189   widget_class->motion_notify_event = gtk_spin_button_motion_notify;
 190   widget_class->key_release_event = gtk_spin_button_key_release;
 191   widget_class->enter_notify_event = gtk_spin_button_enter_notify;
 192   widget_class->leave_notify_event = gtk_spin_button_leave_notify;
 193   widget_class->focus_out_event = gtk_spin_button_focus_out;
 194   widget_class->grab_notify = gtk_spin_button_grab_notify;
 195   widget_class->state_changed = gtk_spin_button_state_changed;
 196   widget_class->style_set = gtk_spin_button_style_set;
 197
 198   entry_class->activate = gtk_spin_button_activate;
 199   entry_class->get_text_area_size = gtk_spin_button_get_text_area_size;
 200
 201   class->input = NULL;
 202   class->output = NULL;
 203   class->change_value = gtk_spin_button_real_change_value;
 204
 205   g_object_class_install_property (gobject_class,
 206                                    PROP_ADJUSTMENT,
 207                                    g_param_spec_object ("adjustment",
 208                                                         P_("Adjustment"),
 209                                                         P_("The adjustment that holds the value of the spinbutton"),
 210                                                         GTK_TYPE_ADJUSTMENT,
 211                                                         GTK_PARAM_READWRITE));
 212
 213   g_object_class_install_property (gobject_class,
 214                                    PROP_CLIMB_RATE,
 215                                    g_param_spec_double ("climb-rate",
 216                                                         P_("Climb Rate"),
 217                                                         P_("The acceleration rate when you hold down a button"),
 218                                                         0.0,
 219                                                         G_MAXDOUBLE,
 220                                                         0.0,
 221                                                         GTK_PARAM_READWRITE));
 222
 223   g_object_class_install_property (gobject_class,
 224                                    PROP_DIGITS,
 225                                    g_param_spec_uint ("digits",
 226                                                       P_("Digits"),
 227                                                       P_("The number of decimal places to display"),
 228                                                       0,
 229                                                       MAX_DIGITS,
 230                                                       0,
 231                                                       GTK_PARAM_READWRITE));
 232
 233   g_object_class_install_property (gobject_class,
 234                                    PROP_SNAP_TO_TICKS,
 235                                    g_param_spec_boolean ("snap-to-ticks",
 236                                                          P_("Snap to Ticks"),
 237                                                          P_("Whether erroneous values are automatically changed to a spin button's nearest step increment"),
 238                                                          FALSE,
 239                                                          GTK_PARAM_READWRITE));
 240
 241   g_object_class_install_property (gobject_class,
 242                                    PROP_NUMERIC,
 243                                    g_param_spec_boolean ("numeric",
 244                                                          P_("Numeric"),
 245                                                          P_("Whether non-numeric characters should be ignored"),
 246                                                          FALSE,
 247                                                          GTK_PARAM_READWRITE));
 248
 249   g_object_class_install_property (gobject_class,
 250                                    PROP_WRAP,
 251                                    g_param_spec_boolean ("wrap",
 252                                                          P_("Wrap"),
 253                                                          P_("Whether a spin button should wrap upon reaching its limits"),
 254                                                          FALSE,
 255                                                          GTK_PARAM_READWRITE));
 256
 257   g_object_class_install_property (gobject_class,
 258                                    PROP_UPDATE_POLICY,
 259                                    g_param_spec_enum ("update-policy",
 260                                                       P_("Update Policy"),
 261                                                       P_("Whether the spin button should update always, or only when the value is legal"),
 262                                                       GTK_TYPE_SPIN_BUTTON_UPDATE_POLICY,
 263                                                       GTK_UPDATE_ALWAYS,
 264                                                       GTK_PARAM_READWRITE));
 265
 266   g_object_class_install_property (gobject_class,
 267                                    PROP_VALUE,
 268                                    g_param_spec_double ("value",
 269                                                         P_("Value"),
 270                                                         P_("Reads the current value, or sets a new value"),
 271                                                         -G_MAXDOUBLE,
 272                                                         G_MAXDOUBLE,
 273                                                         0.0,
 274                                                         GTK_PARAM_READWRITE));
 275
 276   gtk_widget_class_install_style_property_parser (widget_class,
 277                                                   g_param_spec_enum ("shadow-type",
 278                                                                      "Shadow Type",
 279                                                                      P_("Style of bevel around the spin button"),
 280                                                                      GTK_TYPE_SHADOW_TYPE,
 281                                                                      GTK_SHADOW_IN,
 282                                                                      GTK_PARAM_READABLE),
 283                                                   gtk_rc_property_parse_enum);
 284   spinbutton_signals[INPUT] =
 285     g_signal_new (I_("input"),
 286                   G_TYPE_FROM_CLASS (gobject_class),
 287                   G_SIGNAL_RUN_LAST,
 288                   G_STRUCT_OFFSET (GtkSpinButtonClass, input),
 289                   NULL, NULL,
 290                   _gtk_marshal_INT__POINTER,
 291                   G_TYPE_INT, 1,
 292                   G_TYPE_POINTER);
 293
 294   /**
 295    * GtkSpinButton::output:
 296    * @spin_button: the object which received the signal
 297    *
 298    * The ::output signal can be used to change to formatting
 299    * of the value that is displayed in the spin buttons entry.
 300    * |[
 301    * /&ast; show leading zeros &ast;/
 302    * static gboolean
 303    * on_output (GtkSpinButton *spin,
 304    *            gpointer       data)
 305    * {
 306    *    GtkAdjustment *adj;
 307    *    gchar *text;
 308    *    int value;
 309    *
 310    *    adj = gtk_spin_button_get_adjustment (spin);
 311    *    value = (int)gtk_adjustment_get_value (adj);
 312    *    text = g_strdup_printf ("%02d", value);
 313    *    gtk_entry_set_text (GTK_ENTRY (spin), text);
 314    *    g_free (text);
 315    *
 316    *    return TRUE;
 317    * }
 318    * ]|
 319    *
 320    * Returns: %TRUE if the value has been displayed.
 321    */
 322   spinbutton_signals[OUTPUT] =
 323     g_signal_new (I_("output"),
 324                   G_TYPE_FROM_CLASS (gobject_class),
 325                   G_SIGNAL_RUN_LAST,
 326                   G_STRUCT_OFFSET (GtkSpinButtonClass, output),
 327                   _gtk_boolean_handled_accumulator, NULL,
 328                   _gtk_marshal_BOOLEAN__VOID,
 329                   G_TYPE_BOOLEAN, 0);
 330
 331   spinbutton_signals[VALUE_CHANGED] =
 332     g_signal_new (I_("value_changed"),
 333                   G_TYPE_FROM_CLASS (gobject_class),
 334                   G_SIGNAL_RUN_LAST,
 335                   G_STRUCT_OFFSET (GtkSpinButtonClass, value_changed),
 336                   NULL, NULL,
 337                   _gtk_marshal_VOID__VOID,
 338                   G_TYPE_NONE, 0);
 339
 340   /**
 341    * GtkSpinButton::wrapped:
 342    * @spinbutton: the object which received the signal
 343    *
 344    * The wrapped signal is emitted right after the spinbutton wraps
 345    * from its maximum to minimum value or vice-versa.
 346    *
 347    * Since: 2.10
 348    */
 349   spinbutton_signals[WRAPPED] =
 350     g_signal_new (I_("wrapped"),
 351                   G_TYPE_FROM_CLASS (gobject_class),
 352                   G_SIGNAL_RUN_LAST,
 353                   G_STRUCT_OFFSET (GtkSpinButtonClass, wrapped),
 354                   NULL, NULL,
 355                   _gtk_marshal_VOID__VOID,
 356                   G_TYPE_NONE, 0);
 357
 358   /* Action signals */
 359   spinbutton_signals[CHANGE_VALUE] =
 360     g_signal_new (I_("change_value"),
 361                   G_TYPE_FROM_CLASS (gobject_class),
 362                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 363                   G_STRUCT_OFFSET (GtkSpinButtonClass, change_value),
 364                   NULL, NULL,
 365                   _gtk_marshal_VOID__ENUM,
 366                   G_TYPE_NONE, 1,
 367                   GTK_TYPE_SCROLL_TYPE);
 368
 369   binding_set = gtk_binding_set_by_class (class);
 370
 371   add_spin_binding (binding_set, GDK_Up, 0, GTK_SCROLL_STEP_UP);
 372   add_spin_binding (binding_set, GDK_KP_Up, 0, GTK_SCROLL_STEP_UP);
 373   add_spin_binding (binding_set, GDK_Down, 0, GTK_SCROLL_STEP_DOWN);
 374   add_spin_binding (binding_set, GDK_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 375   add_spin_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 376   add_spin_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_DOWN);
 377   add_spin_binding (binding_set, GDK_Page_Up, GDK_CONTROL_MASK, GTK_SCROLL_END);
 378   add_spin_binding (binding_set, GDK_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_START);
 379 }
 380
 381 static void
 382 gtk_spin_button_editable_init (GtkEditableClass *iface)
 383 {
 384   iface->insert_text = gtk_spin_button_insert_text;
 385 }
 386
 387 static void
 388 gtk_spin_button_set_property (GObject      *object,
 389                               guint         prop_id,
 390                               const GValue *value,
 391                               GParamSpec   *pspec)
 392 {
 393   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (object);
 394
 395   switch (prop_id)
 396     {
 397       GtkAdjustment *adjustment;
 398
 399     case PROP_ADJUSTMENT:
 400       adjustment = GTK_ADJUSTMENT (g_value_get_object (value));
 401       if (!adjustment)
 402         adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 403       gtk_spin_button_set_adjustment (spin_button, adjustment);
 404       break;
 405     case PROP_CLIMB_RATE:
 406       gtk_spin_button_configure (spin_button,
 407                                  spin_button->adjustment,
 408                                  g_value_get_double (value),
 409                                  spin_button->digits);
 410       break;
 411     case PROP_DIGITS:
 412       gtk_spin_button_configure (spin_button,
 413                                  spin_button->adjustment,
 414                                  spin_button->climb_rate,
 415                                  g_value_get_uint (value));
 416       break;
 417     case PROP_SNAP_TO_TICKS:
 418       gtk_spin_button_set_snap_to_ticks (spin_button, g_value_get_boolean (value));
 419       break;
 420     case PROP_NUMERIC:
 421       gtk_spin_button_set_numeric (spin_button, g_value_get_boolean (value));
 422       break;
 423     case PROP_WRAP:
 424       gtk_spin_button_set_wrap (spin_button, g_value_get_boolean (value));
 425       break;
 426     case PROP_UPDATE_POLICY:
 427       gtk_spin_button_set_update_policy (spin_button, g_value_get_enum (value));
 428       break;
 429     case PROP_VALUE:
 430       gtk_spin_button_set_value (spin_button, g_value_get_double (value));
 431       break;
 432     default:
 433       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 434       break;
 435     }
 436 }
 437
 438 static void
 439 gtk_spin_button_get_property (GObject      *object,
 440                               guint         prop_id,
 441                               GValue       *value,
 442                               GParamSpec   *pspec)
 443 {
 444   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (object);
 445
 446   switch (prop_id)
 447     {
 448     case PROP_ADJUSTMENT:
 449       g_value_set_object (value, spin_button->adjustment);
 450       break;
 451     case PROP_CLIMB_RATE:
 452       g_value_set_double (value, spin_button->climb_rate);
 453       break;
 454     case PROP_DIGITS:
 455       g_value_set_uint (value, spin_button->digits);
 456       break;
 457     case PROP_SNAP_TO_TICKS:
 458       g_value_set_boolean (value, spin_button->snap_to_ticks);
 459       break;
 460     case PROP_NUMERIC:
 461       g_value_set_boolean (value, spin_button->numeric);
 462       break;
 463     case PROP_WRAP:
 464       g_value_set_boolean (value, spin_button->wrap);
 465       break;
 466     case PROP_UPDATE_POLICY:
 467       g_value_set_enum (value, spin_button->update_policy);
 468       break;
 469      case PROP_VALUE:
 470        g_value_set_double (value, spin_button->adjustment->value);
 471       break;
 472     default:
 473       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 474       break;
 475     }
 476 }
 477
 478 static void
 479 gtk_spin_button_init (GtkSpinButton *spin_button)
 480 {
 481   spin_button->adjustment = NULL;
 482   spin_button->panel = NULL;
 483   spin_button->timer = 0;
 484   spin_button->climb_rate = 0.0;
 485   spin_button->timer_step = 0.0;
 486   spin_button->update_policy = GTK_UPDATE_ALWAYS;
 487   spin_button->in_child = NO_ARROW;
 488   spin_button->click_child = NO_ARROW;
 489   spin_button->button = 0;
 490   spin_button->need_timer = FALSE;
 491   spin_button->timer_calls = 0;
 492   spin_button->digits = 0;
 493   spin_button->numeric = FALSE;
 494   spin_button->wrap = FALSE;
 495   spin_button->snap_to_ticks = FALSE;
 496
 497   gtk_spin_button_set_adjustment (spin_button,
 498           (GtkAdjustment*) gtk_adjustment_new (0, 0, 0, 0, 0, 0));
 499 }
 500
 501 static void
 502 gtk_spin_button_finalize (GObject *object)
 503 {
 504   gtk_spin_button_set_adjustment (GTK_SPIN_BUTTON (object), NULL);
 505
 506   G_OBJECT_CLASS (gtk_spin_button_parent_class)->finalize (object);
 507 }
 508
 509 static void
 510 gtk_spin_button_destroy (GtkObject *object)
 511 {
 512   gtk_spin_button_stop_spinning (GTK_SPIN_BUTTON (object));
 513
 514   GTK_OBJECT_CLASS (gtk_spin_button_parent_class)->destroy (object);
 515 }
 516
 517 static void
 518 gtk_spin_button_map (GtkWidget *widget)
 519 {
 520   if (GTK_WIDGET_REALIZED (widget) && !GTK_WIDGET_MAPPED (widget))
 521     {
 522       GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->map (widget);
 523       gdk_window_show (GTK_SPIN_BUTTON (widget)->panel);
 524     }
 525 }
 526
 527 static void
 528 gtk_spin_button_unmap (GtkWidget *widget)
 529 {
 530   if (GTK_WIDGET_MAPPED (widget))
 531     {
 532       gtk_spin_button_stop_spinning (GTK_SPIN_BUTTON (widget));
 533
 534       gdk_window_hide (GTK_SPIN_BUTTON (widget)->panel);
 535       GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->unmap (widget);
 536     }
 537 }
 538
 539 static void
 540 gtk_spin_button_realize (GtkWidget *widget)
 541 {
 542   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
 543   GdkWindowAttr attributes;
 544   gint attributes_mask;
 545   gboolean return_val;
 546   gint arrow_size;
 547
 548   arrow_size = spin_button_get_arrow_size (spin_button);
 549
 550   gtk_widget_set_events (widget, gtk_widget_get_events (widget) |
 551                          GDK_KEY_RELEASE_MASK);
 552   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->realize (widget);
 553
 554   attributes.window_type = GDK_WINDOW_CHILD;
 555   attributes.wclass = GDK_INPUT_OUTPUT;
 556   attributes.visual = gtk_widget_get_visual (widget);
 557   attributes.colormap = gtk_widget_get_colormap (widget);
 558   attributes.event_mask = gtk_widget_get_events (widget);
 559   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK
 560     | GDK_BUTTON_RELEASE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_ENTER_NOTIFY_MASK
 561     | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK;
 562
 563   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 564
 565   attributes.x = (widget->allocation.width - arrow_size -
 566                   2 * widget->style->xthickness);
 567   attributes.y = (widget->allocation.height -
 568                                          widget->requisition.height) / 2;
 569   attributes.width = arrow_size + 2 * widget->style->xthickness;
 570   attributes.height = widget->requisition.height;
 571
 572   spin_button->panel = gdk_window_new (widget->window,
 573                                        &attributes, attributes_mask);
 574   gdk_window_set_user_data (spin_button->panel, widget);
 575
 576   gtk_style_set_background (widget->style, spin_button->panel, GTK_STATE_NORMAL);
 577
 578   return_val = FALSE;
 579   g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
 580   if (return_val == FALSE)
 581     gtk_spin_button_default_output (spin_button);
 582
 583   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
 584 }
 585
 586 static void
 587 gtk_spin_button_unrealize (GtkWidget *widget)
 588 {
 589   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 590
 591   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->unrealize (widget);
 592
 593   if (spin->panel)
 594     {
 595       gdk_window_set_user_data (spin->panel, NULL);
 596       gdk_window_destroy (spin->panel);
 597       spin->panel = NULL;
 598     }
 599 }
 600
 601 static int
 602 compute_double_length (double val, int digits)
 603 {
 604   int a;
 605   int extra;
 606
 607   a = 1;
 608   if (fabs (val) > 1.0)
 609     a = floor (log10 (fabs (val))) + 1;
 610
 611   extra = 0;
 612
 613   /* The dot: */
 614   if (digits > 0)
 615     extra++;
 616
 617   /* The sign: */
 618   if (val < 0)
 619     extra++;
 620
 621   return a + digits + extra;
 622 }
 623
 624 static void
 625 gtk_spin_button_size_request (GtkWidget      *widget,
 626                               GtkRequisition *requisition)
 627 {
 628   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
 629   GtkEntry *entry = GTK_ENTRY (widget);
 630   gint arrow_size;
 631
 632   arrow_size = spin_button_get_arrow_size (spin_button);
 633
 634   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->size_request (widget, requisition);
 635
 636   if (entry->width_chars < 0)
 637     {
 638       PangoContext *context;
 639       PangoFontMetrics *metrics;
 640       gint width;
 641       gint w;
 642       gint string_len;
 643       gint max_string_len;
 644       gint digit_width;
 645       gboolean interior_focus;
 646       gint focus_width;
 647       gint xborder, yborder;
 648       GtkBorder inner_border;
 649
 650       gtk_widget_style_get (widget,
 651                             "interior-focus", &interior_focus,
 652                             "focus-line-width", &focus_width,
 653                             NULL);
 654
 655       context = gtk_widget_get_pango_context (widget);
 656       metrics = pango_context_get_metrics (context,
 657                                            widget->style->font_desc,
 658                                            pango_context_get_language (context));
 659
 660       digit_width = pango_font_metrics_get_approximate_digit_width (metrics);
 661       digit_width = PANGO_SCALE *
 662         ((digit_width + PANGO_SCALE - 1) / PANGO_SCALE);
 663
 664       pango_font_metrics_unref (metrics);
 665
 666       /* Get max of MIN_SPIN_BUTTON_WIDTH, size of upper, size of lower */
 667
 668       width = MIN_SPIN_BUTTON_WIDTH;
 669       max_string_len = MAX (10, compute_double_length (1e9 * spin_button->adjustment->step_increment,
 670                                                        spin_button->digits));
 671
 672       string_len = compute_double_length (spin_button->adjustment->upper,
 673                                           spin_button->digits);
 674       w = PANGO_PIXELS (MIN (string_len, max_string_len) * digit_width);
 675       width = MAX (width, w);
 676       string_len = compute_double_length (spin_button->adjustment->lower,
 677                                           spin_button->digits);
 678       w = PANGO_PIXELS (MIN (string_len, max_string_len) * digit_width);
 679       width = MAX (width, w);
 680
 681       _gtk_entry_get_borders (entry, &xborder, &yborder);
 682       _gtk_entry_effective_inner_border (entry, &inner_border);
 683
 684       requisition->width = width + xborder * 2 + inner_border.left + inner_border.right;
 685     }
 686
 687   requisition->width += arrow_size + 2 * widget->style->xthickness;
 688 }
 689
 690 static void
 691 gtk_spin_button_size_allocate (GtkWidget     *widget,
 692                                GtkAllocation *allocation)
 693 {
 694   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 695   GtkAllocation panel_allocation;
 696   gint arrow_size;
 697   gint panel_width;
 698
 699   arrow_size = spin_button_get_arrow_size (spin);
 700   panel_width = arrow_size + 2 * widget->style->xthickness;
 701
 702   widget->allocation = *allocation;
 703
 704   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 705     panel_allocation.x = 0;
 706   else
 707     panel_allocation.x = allocation->width - panel_width;
 708
 709   panel_allocation.width = panel_width;
 710   panel_allocation.height = MIN (widget->requisition.height, allocation->height);
 711
 712   panel_allocation.y = 0;
 713
 714   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->size_allocate (widget, allocation);
 715
 716   if (GTK_WIDGET_REALIZED (widget))
 717     {
 718       gdk_window_move_resize (GTK_SPIN_BUTTON (widget)->panel,
 719                               panel_allocation.x,
 720                               panel_allocation.y,
 721                               panel_allocation.width,
 722                               panel_allocation.height);
 723     }
 724
 725   gtk_widget_queue_draw (GTK_WIDGET (spin));
 726 }
 727
 728 static gint
 729 gtk_spin_button_expose (GtkWidget      *widget,
 730                         GdkEventExpose *event)
 731 {
 732   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 733
 734   if (GTK_WIDGET_DRAWABLE (widget))
 735     {
 736       if (event->window == spin->panel)
 737         {
 738           GtkShadowType shadow_type;
 739
 740           shadow_type = spin_button_get_shadow_type (spin);
 741
 742           if (shadow_type != GTK_SHADOW_NONE)
 743             {
 744               gint width, height;
 745
 746               gdk_drawable_get_size (spin->panel, &width, &height);
 747
 748               gtk_paint_box (widget->style, spin->panel,
 749                              GTK_STATE_NORMAL, shadow_type,
 750                              &event->area, widget, "spinbutton",
 751                              0, 0, width, height);
 752             }
 753
 754           gtk_spin_button_draw_arrow (spin, &event->area, GTK_ARROW_UP);
 755           gtk_spin_button_draw_arrow (spin, &event->area, GTK_ARROW_DOWN);
 756         }
 757       else
 758         GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->expose_event (widget, event);
 759     }
 760
 761   return FALSE;
 762 }
 763
 764 static gboolean
 765 spin_button_at_limit (GtkSpinButton *spin_button,
 766                      GtkArrowType   arrow)
 767 {
 768   GtkArrowType effective_arrow;
 769
 770   if (spin_button->wrap)
 771     return FALSE;
 772
 773   if (spin_button->adjustment->step_increment > 0)
 774     effective_arrow = arrow;
 775   else
 776     effective_arrow = arrow == GTK_ARROW_UP ? GTK_ARROW_DOWN : GTK_ARROW_UP;
 777
 778   if (effective_arrow == GTK_ARROW_UP &&
 779       (spin_button->adjustment->upper - spin_button->adjustment->value <= EPSILON))
 780     return TRUE;
 781
 782   if (effective_arrow == GTK_ARROW_DOWN &&
 783       (spin_button->adjustment->value - spin_button->adjustment->lower <= EPSILON))
 784     return TRUE;
 785
 786   return FALSE;
 787 }
 788
 789 static void
 790 gtk_spin_button_draw_arrow (GtkSpinButton *spin_button,
 791                             GdkRectangle  *area,
 792                             GtkArrowType   arrow_type)
 793 {
 794   GtkStateType state_type;
 795   GtkShadowType shadow_type;
 796   GtkWidget *widget;
 797   gint x;
 798   gint y;
 799   gint height;
 800   gint width;
 801   gint h, w;
 802
 803   g_return_if_fail (arrow_type == GTK_ARROW_UP || arrow_type == GTK_ARROW_DOWN);
 804
 805   widget = GTK_WIDGET (spin_button);
 806
 807   if (GTK_WIDGET_DRAWABLE (widget))
 808     {
 809       width = spin_button_get_arrow_size (spin_button) + 2 * widget->style->xthickness;
 810
 811       if (arrow_type == GTK_ARROW_UP)
 812         {
 813           x = 0;
 814           y = 0;
 815
 816           height = widget->requisition.height / 2;
 817         }
 818       else
 819         {
 820           x = 0;
 821           y = widget->requisition.height / 2;
 822
 823           height = (widget->requisition.height + 1) / 2;
 824         }
 825
 826       if (spin_button_at_limit (spin_button, arrow_type))
 827         {
 828           shadow_type = GTK_SHADOW_OUT;
 829           state_type = GTK_STATE_INSENSITIVE;
 830         }
 831       else
 832         {
 833           if (spin_button->click_child == arrow_type)
 834             {
 835               state_type = GTK_STATE_ACTIVE;
 836               shadow_type = GTK_SHADOW_IN;
 837             }
 838           else
 839             {
 840               if (spin_button->in_child == arrow_type &&
 841                   spin_button->click_child == NO_ARROW)
 842                 {
 843                   state_type = GTK_STATE_PRELIGHT;
 844                 }
 845               else
 846                 {
 847                   state_type = GTK_WIDGET_STATE (widget);
 848                 }
 849
 850               shadow_type = GTK_SHADOW_OUT;
 851             }
 852         }
 853
 854       gtk_paint_box (widget->style, spin_button->panel,
 855                      state_type, shadow_type,
 856                      area, widget,
 857                      (arrow_type == GTK_ARROW_UP)? "spinbutton_up" : "spinbutton_down",
 858                      x, y, width, height);
 859
 860       height = widget->requisition.height;
 861
 862       if (arrow_type == GTK_ARROW_DOWN)
 863         {
 864           y = height / 2;
 865           height = height - y - 2;
 866         }
 867       else
 868         {
 869           y = 2;
 870           height = height / 2 - 2;
 871         }
 872
 873       width -= 3;
 874
 875       if (widget && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 876         x = 2;
 877       else
 878         x = 1;
 879
 880       w = width / 2;
 881       w -= w % 2 - 1; /* force odd */
 882       h = (w + 1) / 2;
 883
 884       x += (width - w) / 2;
 885       y += (height - h) / 2;
 886
 887       height = h;
 888       width = w;
 889
 890       gtk_paint_arrow (widget->style, spin_button->panel,
 891                        state_type, shadow_type,
 892                        area, widget, "spinbutton",
 893                        arrow_type, TRUE,
 894                        x, y, width, height);
 895     }
 896 }
 897
 898 static gint
 899 gtk_spin_button_enter_notify (GtkWidget        *widget,
 900                               GdkEventCrossing *event)
 901 {
 902   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 903
 904   if (event->window == spin->panel)
 905     {
 906       gint x;
 907       gint y;
 908
 909       gdk_window_get_pointer (spin->panel, &x, &y, NULL);
 910
 911       if (y <= widget->requisition.height / 2)
 912         spin->in_child = GTK_ARROW_UP;
 913       else
 914         spin->in_child = GTK_ARROW_DOWN;
 915
 916       gtk_widget_queue_draw (GTK_WIDGET (spin));
 917     }
 918
 919   return FALSE;
 920 }
 921
 922 static gint
 923 gtk_spin_button_leave_notify (GtkWidget        *widget,
 924                               GdkEventCrossing *event)
 925 {
 926   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 927
 928   spin->in_child = NO_ARROW;
 929   gtk_widget_queue_draw (GTK_WIDGET (spin));
 930
 931   return FALSE;
 932 }
 933
 934 static gint
 935 gtk_spin_button_focus_out (GtkWidget     *widget,
 936                            GdkEventFocus *event)
 937 {
 938   if (GTK_ENTRY (widget)->editable)
 939     gtk_spin_button_update (GTK_SPIN_BUTTON (widget));
 940
 941   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->focus_out_event (widget, event);
 942 }
 943
 944 static void
 945 gtk_spin_button_grab_notify (GtkWidget *widget,
 946                              gboolean   was_grabbed)
 947 {
 948   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 949
 950   if (!was_grabbed)
 951     {
 952       gtk_spin_button_stop_spinning (spin);
 953       gtk_widget_queue_draw (GTK_WIDGET (spin));
 954     }
 955 }
 956
 957 static void
 958 gtk_spin_button_state_changed (GtkWidget    *widget,
 959                                GtkStateType  previous_state)
 960 {
 961   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 962
 963   if (!GTK_WIDGET_IS_SENSITIVE (widget))
 964     {
 965       gtk_spin_button_stop_spinning (spin);
 966       gtk_widget_queue_draw (GTK_WIDGET (spin));
 967     }
 968 }
 969
 970 static void
 971 gtk_spin_button_style_set (GtkWidget *widget,
 972                            GtkStyle  *previous_style)
 973 {
 974   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 975
 976   if (previous_style && GTK_WIDGET_REALIZED (widget))
 977     gtk_style_set_background (widget->style, spin->panel, GTK_STATE_NORMAL);
 978
 979   (* GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->style_set) (widget, previous_style);
 980 }
 981
 982
 983 static gint
 984 gtk_spin_button_scroll (GtkWidget      *widget,
 985                         GdkEventScroll *event)
 986 {
 987   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 988
 989   if (event->direction == GDK_SCROLL_UP)
 990     {
 991       if (!GTK_WIDGET_HAS_FOCUS (widget))
 992         gtk_widget_grab_focus (widget);
 993       gtk_spin_button_real_spin (spin, spin->adjustment->step_increment);
 994     }
 995   else if (event->direction == GDK_SCROLL_DOWN)
 996     {
 997       if (!GTK_WIDGET_HAS_FOCUS (widget))
 998         gtk_widget_grab_focus (widget);
 999       gtk_spin_button_real_spin (spin, -spin->adjustment->step_increment);
1000     }
1001   else
1002     return FALSE;
1003
1004   return TRUE;
1005 }
1006
1007 static void
1008 gtk_spin_button_stop_spinning (GtkSpinButton *spin)
1009 {
1010   if (spin->timer)
1011     {
1012       g_source_remove (spin->timer);
1013       spin->timer = 0;
1014       spin->timer_calls = 0;
1015       spin->need_timer = FALSE;
1016     }
1017
1018   spin->button = 0;
1019   spin->timer = 0;
1020   spin->timer_step = spin->adjustment->step_increment;
1021   spin->timer_calls = 0;
1022
1023   spin->click_child = NO_ARROW;
1024   spin->button = 0;
1025 }
1026
1027 static void
1028 start_spinning (GtkSpinButton *spin,
1029                 GtkArrowType   click_child,
1030                 gdouble        step)
1031 {
1032   g_return_if_fail (click_child == GTK_ARROW_UP || click_child == GTK_ARROW_DOWN);
1033
1034   spin->click_child = click_child;
1035
1036   if (!spin->timer)
1037     {
1038       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (spin));
1039       guint        timeout;
1040
1041       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1042
1043       spin->timer_step = step;
1044       spin->need_timer = TRUE;
1045       spin->timer = gdk_threads_add_timeout (timeout,
1046                                    (GSourceFunc) gtk_spin_button_timer,
1047                                    (gpointer) spin);
1048     }
1049   gtk_spin_button_real_spin (spin, click_child == GTK_ARROW_UP ? step : -step);
1050
1051   gtk_widget_queue_draw (GTK_WIDGET (spin));
1052 }
1053
1054 static gint
1055 gtk_spin_button_button_press (GtkWidget      *widget,
1056                               GdkEventButton *event)
1057 {
1058   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1059
1060   if (!spin->button)
1061     {
1062       if (event->window == spin->panel)
1063         {
1064           if (!GTK_WIDGET_HAS_FOCUS (widget))
1065             gtk_widget_grab_focus (widget);
1066           spin->button = event->button;
1067
1068           if (GTK_ENTRY (widget)->editable)
1069             gtk_spin_button_update (spin);
1070
1071           if (event->y <= widget->requisition.height / 2)
1072             {
1073               if (event->button == 1)
1074                 start_spinning (spin, GTK_ARROW_UP, spin->adjustment->step_increment);
1075               else if (event->button == 2)
1076                 start_spinning (spin, GTK_ARROW_UP, spin->adjustment->page_increment);
1077               else
1078                 spin->click_child = GTK_ARROW_UP;
1079             }
1080           else
1081             {
1082               if (event->button == 1)
1083                 start_spinning (spin, GTK_ARROW_DOWN, spin->adjustment->step_increment);
1084               else if (event->button == 2)
1085                 start_spinning (spin, GTK_ARROW_DOWN, spin->adjustment->page_increment);
1086               else
1087                 spin->click_child = GTK_ARROW_DOWN;
1088             }
1089           return TRUE;
1090         }
1091       else
1092         return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->button_press_event (widget, event);
1093     }
1094   return FALSE;
1095 }
1096
1097 static gint
1098 gtk_spin_button_button_release (GtkWidget      *widget,
1099                                 GdkEventButton *event)
1100 {
1101   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1102   gint arrow_size;
1103
1104   arrow_size = spin_button_get_arrow_size (spin);
1105
1106   if (event->button == spin->button)
1107     {
1108       int click_child = spin->click_child;
1109
1110       gtk_spin_button_stop_spinning (spin);
1111
1112       if (event->button == 3)
1113         {
1114           if (event->y >= 0 && event->x >= 0 &&
1115               event->y <= widget->requisition.height &&
1116               event->x <= arrow_size + 2 * widget->style->xthickness)
1117             {
1118               if (click_child == GTK_ARROW_UP &&
1119                   event->y <= widget->requisition.height / 2)
1120                 {
1121                   gdouble diff;
1122
1123                   diff = spin->adjustment->upper - spin->adjustment->value;
1124                   if (diff > EPSILON)
1125                     gtk_spin_button_real_spin (spin, diff);
1126                 }
1127               else if (click_child == GTK_ARROW_DOWN &&
1128                        event->y > widget->requisition.height / 2)
1129                 {
1130                   gdouble diff;
1131
1132                   diff = spin->adjustment->value - spin->adjustment->lower;
1133                   if (diff > EPSILON)
1134                     gtk_spin_button_real_spin (spin, -diff);
1135                 }
1136             }
1137         }
1138       gtk_widget_queue_draw (GTK_WIDGET (spin));
1139
1140       return TRUE;
1141     }
1142   else
1143     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->button_release_event (widget, event);
1144 }
1145
1146 static gint
1147 gtk_spin_button_motion_notify (GtkWidget      *widget,
1148                                GdkEventMotion *event)
1149 {
1150   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1151
1152   if (spin->button)
1153     return FALSE;
1154
1155   if (event->window == spin->panel)
1156     {
1157       gint y = event->y;
1158
1159       gdk_event_request_motions (event);
1160
1161       if (y <= widget->requisition.height / 2 &&
1162           spin->in_child == GTK_ARROW_DOWN)
1163         {
1164           spin->in_child = GTK_ARROW_UP;
1165           gtk_widget_queue_draw (GTK_WIDGET (spin));
1166         }
1167       else if (y > widget->requisition.height / 2 &&
1168           spin->in_child == GTK_ARROW_UP)
1169         {
1170           spin->in_child = GTK_ARROW_DOWN;
1171           gtk_widget_queue_draw (GTK_WIDGET (spin));
1172         }
1173
1174       return FALSE;
1175     }
1176
1177   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->motion_notify_event (widget, event);
1178 }
1179
1180 static gint
1181 gtk_spin_button_timer (GtkSpinButton *spin_button)
1182 {
1183   gboolean retval = FALSE;
1184
1185   if (spin_button->timer)
1186     {
1187       if (spin_button->click_child == GTK_ARROW_UP)
1188         gtk_spin_button_real_spin (spin_button, spin_button->timer_step);
1189       else
1190         gtk_spin_button_real_spin (spin_button, -spin_button->timer_step);
1191
1192       if (spin_button->need_timer)
1193         {
1194           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (spin_button));
1195           guint        timeout;
1196
1197           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
1198
1199           spin_button->need_timer = FALSE;
1200           spin_button->timer = gdk_threads_add_timeout (timeout,
1201                                               (GSourceFunc) gtk_spin_button_timer,
1202                                               (gpointer) spin_button);
1203         }
1204       else
1205         {
1206           if (spin_button->climb_rate > 0.0 && spin_button->timer_step
1207               < spin_button->adjustment->page_increment)
1208             {
1209               if (spin_button->timer_calls < MAX_TIMER_CALLS)
1210                 spin_button->timer_calls++;
1211               else
1212                 {
1213                   spin_button->timer_calls = 0;
1214                   spin_button->timer_step += spin_button->climb_rate;
1215                 }
1216             }
1217           retval = TRUE;
1218         }
1219     }
1220
1221   return retval;
1222 }
1223
1224 static void
1225 gtk_spin_button_value_changed (GtkAdjustment *adjustment,
1226                                GtkSpinButton *spin_button)
1227 {
1228   gboolean return_val;
1229
1230   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
1231
1232   return_val = FALSE;
1233   g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1234   if (return_val == FALSE)
1235     gtk_spin_button_default_output (spin_button);
1236
1237   g_signal_emit (spin_button, spinbutton_signals[VALUE_CHANGED], 0);
1238
1239   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1240
1241   g_object_notify (G_OBJECT (spin_button), "value");
1242 }
1243
1244 static void
1245 gtk_spin_button_real_change_value (GtkSpinButton *spin,
1246                                    GtkScrollType  scroll)
1247 {
1248   gdouble old_value;
1249
1250   /* When the key binding is activated, there may be an outstanding
1251    * value, so we first have to commit what is currently written in
1252    * the spin buttons text entry. See #106574
1253    */
1254   gtk_spin_button_update (spin);
1255
1256   old_value = spin->adjustment->value;
1257
1258   /* We don't test whether the entry is editable, since
1259    * this key binding conceptually corresponds to changing
1260    * the value with the buttons using the mouse, which
1261    * we allow for non-editable spin buttons.
1262    */
1263   switch (scroll)
1264     {
1265     case GTK_SCROLL_STEP_BACKWARD:
1266     case GTK_SCROLL_STEP_DOWN:
1267     case GTK_SCROLL_STEP_LEFT:
1268       gtk_spin_button_real_spin (spin, -spin->timer_step);
1269
1270       if (spin->climb_rate > 0.0 && spin->timer_step
1271           < spin->adjustment->page_increment)
1272         {
1273           if (spin->timer_calls < MAX_TIMER_CALLS)
1274             spin->timer_calls++;
1275           else
1276             {
1277               spin->timer_calls = 0;
1278               spin->timer_step += spin->climb_rate;
1279             }
1280         }
1281       break;
1282
1283     case GTK_SCROLL_STEP_FORWARD:
1284     case GTK_SCROLL_STEP_UP:
1285     case GTK_SCROLL_STEP_RIGHT:
1286       gtk_spin_button_real_spin (spin, spin->timer_step);
1287
1288       if (spin->climb_rate > 0.0 && spin->timer_step
1289           < spin->adjustment->page_increment)
1290         {
1291           if (spin->timer_calls < MAX_TIMER_CALLS)
1292             spin->timer_calls++;
1293           else
1294             {
1295               spin->timer_calls = 0;
1296               spin->timer_step += spin->climb_rate;
1297             }
1298         }
1299       break;
1300
1301     case GTK_SCROLL_PAGE_BACKWARD:
1302     case GTK_SCROLL_PAGE_DOWN:
1303     case GTK_SCROLL_PAGE_LEFT:
1304       gtk_spin_button_real_spin (spin, -spin->adjustment->page_increment);
1305       break;
1306
1307     case GTK_SCROLL_PAGE_FORWARD:
1308     case GTK_SCROLL_PAGE_UP:
1309     case GTK_SCROLL_PAGE_RIGHT:
1310       gtk_spin_button_real_spin (spin, spin->adjustment->page_increment);
1311       break;
1312
1313     case GTK_SCROLL_START:
1314       {
1315         gdouble diff = spin->adjustment->value - spin->adjustment->lower;
1316         if (diff > EPSILON)
1317           gtk_spin_button_real_spin (spin, -diff);
1318         break;
1319       }
1320
1321     case GTK_SCROLL_END:
1322       {
1323         gdouble diff = spin->adjustment->upper - spin->adjustment->value;
1324         if (diff > EPSILON)
1325           gtk_spin_button_real_spin (spin, diff);
1326         break;
1327       }
1328
1329     default:
1330       g_warning ("Invalid scroll type %d for GtkSpinButton::change-value", scroll);
1331       break;
1332     }
1333
1334   gtk_spin_button_update (spin);
1335
1336   if (spin->adjustment->value == old_value)
1337     gtk_widget_error_bell (GTK_WIDGET (spin));
1338 }
1339
1340 static gint
1341 gtk_spin_button_key_release (GtkWidget   *widget,
1342                              GdkEventKey *event)
1343 {
1344   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1345
1346   /* We only get a release at the end of a key repeat run, so reset the timer_step */
1347   spin->timer_step = spin->adjustment->step_increment;
1348   spin->timer_calls = 0;
1349
1350   return TRUE;
1351 }
1352
1353 static void
1354 gtk_spin_button_snap (GtkSpinButton *spin_button,
1355                       gdouble        val)
1356 {
1357   gdouble inc;
1358   gdouble tmp;
1359
1360   inc = spin_button->adjustment->step_increment;
1361   if (inc == 0)
1362     return;
1363
1364   tmp = (val - spin_button->adjustment->lower) / inc;
1365   if (tmp - floor (tmp) < ceil (tmp) - tmp)
1366     val = spin_button->adjustment->lower + floor (tmp) * inc;
1367   else
1368     val = spin_button->adjustment->lower + ceil (tmp) * inc;
1369
1370   gtk_spin_button_set_value (spin_button, val);
1371 }
1372
1373 static void
1374 gtk_spin_button_activate (GtkEntry *entry)
1375 {
1376   if (entry->editable)
1377     gtk_spin_button_update (GTK_SPIN_BUTTON (entry));
1378
1379   /* Chain up so that entry->activates_default is honored */
1380   GTK_ENTRY_CLASS (gtk_spin_button_parent_class)->activate (entry);
1381 }
1382
1383 static void
1384 gtk_spin_button_get_text_area_size (GtkEntry *entry,
1385                                     gint     *x,
1386                                     gint     *y,
1387                                     gint     *width,
1388                                     gint     *height)
1389 {
1390   gint arrow_size;
1391   gint panel_width;
1392
1393   GTK_ENTRY_CLASS (gtk_spin_button_parent_class)->get_text_area_size (entry, x, y, width, height);
1394
1395   arrow_size = spin_button_get_arrow_size (GTK_SPIN_BUTTON (entry));
1396   panel_width = arrow_size + 2 * GTK_WIDGET (entry)->style->xthickness;
1397
1398   if (width)
1399     *width -= panel_width;
1400
1401   if (gtk_widget_get_direction (GTK_WIDGET (entry)) == GTK_TEXT_DIR_RTL && x)
1402     *x += panel_width;
1403 }
1404
1405 static void
1406 gtk_spin_button_insert_text (GtkEditable *editable,
1407                              const gchar *new_text,
1408                              gint         new_text_length,
1409                              gint        *position)
1410 {
1411   GtkEntry *entry = GTK_ENTRY (editable);
1412   GtkSpinButton *spin = GTK_SPIN_BUTTON (editable);
1413   GtkEditableClass *parent_editable_iface = g_type_interface_peek (gtk_spin_button_parent_class, GTK_TYPE_EDITABLE);
1414
1415   if (spin->numeric)
1416     {
1417       struct lconv *lc;
1418       gboolean sign;
1419       gint dotpos = -1;
1420       gint i;
1421       GdkWChar pos_sign;
1422       GdkWChar neg_sign;
1423       gint entry_length;
1424
1425       entry_length = entry->text_length;
1426
1427       lc = localeconv ();
1428
1429       if (*(lc->negative_sign))
1430         neg_sign = *(lc->negative_sign);
1431       else
1432         neg_sign = '-';
1433
1434       if (*(lc->positive_sign))
1435         pos_sign = *(lc->positive_sign);
1436       else
1437         pos_sign = '+';
1438
1439 #ifdef G_OS_WIN32
1440       /* Workaround for bug caused by some Windows application messing
1441        * up the positive sign of the current locale, more specifically
1442        * HKEY_CURRENT_USER\Control Panel\International\sPositiveSign.
1443        * See bug #330743 and for instance
1444        * http://www.msnewsgroups.net/group/microsoft.public.dotnet.languages.csharp/topic36024.aspx
1445        *
1446        * I don't know if the positive sign always gets bogusly set to
1447        * a digit when the above Registry value is corrupted as
1448        * described. (In my test case, it got set to "8", and in the
1449        * bug report above it presumably was set ot "0".) Probably it
1450        * might get set to almost anything? So how to distinguish a
1451        * bogus value from some correct one for some locale? That is
1452        * probably hard, but at least we should filter out the
1453        * digits...
1454        */
1455       if (pos_sign >= '0' && pos_sign <= '9')
1456         pos_sign = '+';
1457 #endif
1458
1459       for (sign=0, i=0; i<entry_length; i++)
1460         if ((entry->text[i] == neg_sign) ||
1461             (entry->text[i] == pos_sign))
1462           {
1463             sign = 1;
1464             break;
1465           }
1466
1467       if (sign && !(*position))
1468         return;
1469
1470       for (dotpos=-1, i=0; i<entry_length; i++)
1471         if (entry->text[i] == *(lc->decimal_point))
1472           {
1473             dotpos = i;
1474             break;
1475           }
1476
1477       if (dotpos > -1 && *position > dotpos &&
1478           (gint)spin->digits - entry_length
1479             + dotpos - new_text_length + 1 < 0)
1480         return;
1481
1482       for (i = 0; i < new_text_length; i++)
1483         {
1484           if (new_text[i] == neg_sign || new_text[i] == pos_sign)
1485             {
1486               if (sign || (*position) || i)
1487                 return;
1488               sign = TRUE;
1489             }
1490           else if (new_text[i] == *(lc->decimal_point))
1491             {
1492               if (!spin->digits || dotpos > -1 ||
1493                   (new_text_length - 1 - i + entry_length
1494                     - *position > (gint)spin->digits))
1495                 return;
1496               dotpos = *position + i;
1497             }
1498           else if (new_text[i] < 0x30 || new_text[i] > 0x39)
1499             return;
1500         }
1501     }
1502
1503   parent_editable_iface->insert_text (editable, new_text,
1504                                       new_text_length, position);
1505 }
1506
1507 static void
1508 gtk_spin_button_real_spin (GtkSpinButton *spin_button,
1509                            gdouble        increment)
1510 {
1511   GtkAdjustment *adj;
1512   gdouble new_value = 0.0;
1513   gboolean wrapped = FALSE;
1514
1515   adj = spin_button->adjustment;
1516
1517   new_value = adj->value + increment;
1518
1519   if (increment > 0)
1520     {
1521       if (spin_button->wrap)
1522         {
1523           if (fabs (adj->value - adj->upper) < EPSILON)
1524             {
1525               new_value = adj->lower;
1526               wrapped = TRUE;
1527             }
1528           else if (new_value > adj->upper)
1529             new_value = adj->upper;
1530         }
1531       else
1532         new_value = MIN (new_value, adj->upper);
1533     }
1534   else if (increment < 0)
1535     {
1536       if (spin_button->wrap)
1537         {
1538           if (fabs (adj->value - adj->lower) < EPSILON)
1539             {
1540               new_value = adj->upper;
1541               wrapped = TRUE;
1542             }
1543           else if (new_value < adj->lower)
1544             new_value = adj->lower;
1545         }
1546       else
1547         new_value = MAX (new_value, adj->lower);
1548     }
1549
1550   if (fabs (new_value - adj->value) > EPSILON)
1551     gtk_adjustment_set_value (adj, new_value);
1552
1553   if (wrapped)
1554     g_signal_emit (spin_button, spinbutton_signals[WRAPPED], 0);
1555
1556   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1557 }
1558
1559 static gint
1560 gtk_spin_button_default_input (GtkSpinButton *spin_button,
1561                                gdouble       *new_val)
1562 {
1563   gchar *err = NULL;
1564
1565   *new_val = g_strtod (gtk_entry_get_text (GTK_ENTRY (spin_button)), &err);
1566   if (*err)
1567     return GTK_INPUT_ERROR;
1568   else
1569     return FALSE;
1570 }
1571
1572 static gint
1573 gtk_spin_button_default_output (GtkSpinButton *spin_button)
1574 {
1575   gchar *buf = g_strdup_printf ("%0.*f", spin_button->digits, spin_button->adjustment->value);
1576
1577   if (strcmp (buf, gtk_entry_get_text (GTK_ENTRY (spin_button))))
1578     gtk_entry_set_text (GTK_ENTRY (spin_button), buf);
1579   g_free (buf);
1580   return FALSE;
1581 }
1582
1583
1584 /***********************************************************
1585  ***********************************************************
1586  ***                  Public interface                   ***
1587  ***********************************************************
1588  ***********************************************************/
1589
1590
1591 void
1592 gtk_spin_button_configure (GtkSpinButton  *spin_button,
1593                            GtkAdjustment  *adjustment,
1594                            gdouble         climb_rate,
1595                            guint           digits)
1596 {
1597   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1598
1599   if (adjustment)
1600     gtk_spin_button_set_adjustment (spin_button, adjustment);
1601   else
1602     adjustment = spin_button->adjustment;
1603
1604   g_object_freeze_notify (G_OBJECT (spin_button));
1605   if (spin_button->digits != digits)
1606     {
1607       spin_button->digits = digits;
1608       g_object_notify (G_OBJECT (spin_button), "digits");
1609     }
1610
1611   if (spin_button->climb_rate != climb_rate)
1612     {
1613       spin_button->climb_rate = climb_rate;
1614       g_object_notify (G_OBJECT (spin_button), "climb-rate");
1615     }
1616   g_object_thaw_notify (G_OBJECT (spin_button));
1617
1618   gtk_adjustment_value_changed (adjustment);
1619 }
1620
1621 GtkWidget *
1622 gtk_spin_button_new (GtkAdjustment *adjustment,
1623                      gdouble        climb_rate,
1624                      guint          digits)
1625 {
1626   GtkSpinButton *spin;
1627
1628   if (adjustment)
1629     g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
1630
1631   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1632
1633   gtk_spin_button_configure (spin, adjustment, climb_rate, digits);
1634
1635   return GTK_WIDGET (spin);
1636 }
1637
1638 /**
1639  * gtk_spin_button_new_with_range:
1640  * @min: Minimum allowable value
1641  * @max: Maximum allowable value
1642  * @step: Increment added or subtracted by spinning the widget
1643  *
1644  * This is a convenience constructor that allows creation of a numeric
1645  * #GtkSpinButton without manually creating an adjustment. The value is
1646  * initially set to the minimum value and a page increment of 10 * @step
1647  * is the default. The precision of the spin button is equivalent to the
1648  * precision of @step.
1649  *
1650  * Note that the way in which the precision is derived works best if @step
1651  * is a power of ten. If the resulting precision is not suitable for your
1652  * needs, use gtk_spin_button_set_digits() to correct it.
1653  *
1654  * Return value: The new spin button as a #GtkWidget.
1655  **/
1656 GtkWidget *
1657 gtk_spin_button_new_with_range (gdouble min,
1658                                 gdouble max,
1659                                 gdouble step)
1660 {
1661   GtkObject *adj;
1662   GtkSpinButton *spin;
1663   gint digits;
1664
1665   g_return_val_if_fail (min <= max, NULL);
1666   g_return_val_if_fail (step != 0.0, NULL);
1667
1668   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1669
1670   adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
1671
1672   if (fabs (step) >= 1.0 || step == 0.0)
1673     digits = 0;
1674   else {
1675     digits = abs ((gint) floor (log10 (fabs (step))));
1676     if (digits > MAX_DIGITS)
1677       digits = MAX_DIGITS;
1678   }
1679
1680   gtk_spin_button_configure (spin, GTK_ADJUSTMENT (adj), step, digits);
1681
1682   gtk_spin_button_set_numeric (spin, TRUE);
1683
1684   return GTK_WIDGET (spin);
1685 }
1686
1687 /* Callback used when the spin button's adjustment changes.  We need to redraw
1688  * the arrows when the adjustment's range changes, and reevaluate our size request.
1689  */
1690 static void
1691 adjustment_changed_cb (GtkAdjustment *adjustment, gpointer data)
1692 {
1693   GtkSpinButton *spin_button;
1694
1695   spin_button = GTK_SPIN_BUTTON (data);
1696
1697   spin_button->timer_step = spin_button->adjustment->step_increment;
1698   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1699 }
1700
1701 /**
1702  * gtk_spin_button_set_adjustment:
1703  * @spin_button: a #GtkSpinButton
1704  * @adjustment: a #GtkAdjustment to replace the existing adjustment
1705  *
1706  * Replaces the #GtkAdjustment associated with @spin_button.
1707  **/
1708 void
1709 gtk_spin_button_set_adjustment (GtkSpinButton *spin_button,
1710                                 GtkAdjustment *adjustment)
1711 {
1712   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1713
1714   if (spin_button->adjustment != adjustment)
1715     {
1716       if (spin_button->adjustment)
1717         {
1718           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1719                                                 gtk_spin_button_value_changed,
1720                                                 spin_button);
1721           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1722                                                 adjustment_changed_cb,
1723                                                 spin_button);
1724           g_object_unref (spin_button->adjustment);
1725         }
1726       spin_button->adjustment = adjustment;
1727       if (adjustment)
1728         {
1729           g_object_ref_sink (adjustment);
1730           g_signal_connect (adjustment, "value_changed",
1731                             G_CALLBACK (gtk_spin_button_value_changed),
1732                             spin_button);
1733           g_signal_connect (adjustment, "changed",
1734                             G_CALLBACK (adjustment_changed_cb),
1735                             spin_button);
1736           spin_button->timer_step = spin_button->adjustment->step_increment;
1737         }
1738
1739       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1740     }
1741
1742   g_object_notify (G_OBJECT (spin_button), "adjustment");
1743 }
1744
1745 /**
1746  * gtk_spin_button_get_adjustment:
1747  * @spin_button: a #GtkSpinButton
1748  *
1749  * Get the adjustment associated with a #GtkSpinButton
1750  *
1751  * Return value: the #GtkAdjustment of @spin_button
1752  **/
1753 GtkAdjustment *
1754 gtk_spin_button_get_adjustment (GtkSpinButton *spin_button)
1755 {
1756   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), NULL);
1757
1758   return spin_button->adjustment;
1759 }
1760
1761 /**
1762  * gtk_spin_button_set_digits:
1763  * @spin_button: a #GtkSpinButton
1764  * @digits: the number of digits after the decimal point to be displayed for the spin button's value
1765  *
1766  * Set the precision to be displayed by @spin_button. Up to 20 digit precision
1767  * is allowed.
1768  **/
1769 void
1770 gtk_spin_button_set_digits (GtkSpinButton *spin_button,
1771                             guint          digits)
1772 {
1773   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1774
1775   if (spin_button->digits != digits)
1776     {
1777       spin_button->digits = digits;
1778       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
1779       g_object_notify (G_OBJECT (spin_button), "digits");
1780
1781       /* since lower/upper may have changed */
1782       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1783     }
1784 }
1785
1786 /**
1787  * gtk_spin_button_get_digits:
1788  * @spin_button: a #GtkSpinButton
1789  *
1790  * Fetches the precision of @spin_button. See gtk_spin_button_set_digits().
1791  *
1792  * Returns: the current precision
1793  **/
1794 guint
1795 gtk_spin_button_get_digits (GtkSpinButton *spin_button)
1796 {
1797   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1798
1799   return spin_button->digits;
1800 }
1801
1802 /**
1803  * gtk_spin_button_set_increments:
1804  * @spin_button: a #GtkSpinButton
1805  * @step: increment applied for a button 1 press.
1806  * @page: increment applied for a button 2 press.
1807  *
1808  * Sets the step and page increments for spin_button.  This affects how
1809  * quickly the value changes when the spin button's arrows are activated.
1810  **/
1811 void
1812 gtk_spin_button_set_increments (GtkSpinButton *spin_button,
1813                                 gdouble        step,
1814                                 gdouble        page)
1815 {
1816   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1817
1818   spin_button->adjustment->step_increment = step;
1819   spin_button->adjustment->page_increment = page;
1820 }
1821
1822 /**
1823  * gtk_spin_button_get_increments:
1824  * @spin_button: a #GtkSpinButton
1825  * @step: location to store step increment, or %NULL
1826  * @page: location to store page increment, or %NULL
1827  *
1828  * Gets the current step and page the increments used by @spin_button. See
1829  * gtk_spin_button_set_increments().
1830  **/
1831 void
1832 gtk_spin_button_get_increments (GtkSpinButton *spin_button,
1833                                 gdouble       *step,
1834                                 gdouble       *page)
1835 {
1836   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1837
1838   if (step)
1839     *step = spin_button->adjustment->step_increment;
1840   if (page)
1841     *page = spin_button->adjustment->page_increment;
1842 }
1843
1844 /**
1845  * gtk_spin_button_set_range:
1846  * @spin_button: a #GtkSpinButton
1847  * @min: minimum allowable value
1848  * @max: maximum allowable value
1849  *
1850  * Sets the minimum and maximum allowable values for @spin_button
1851  **/
1852 void
1853 gtk_spin_button_set_range (GtkSpinButton *spin_button,
1854                            gdouble        min,
1855                            gdouble        max)
1856 {
1857   gdouble value;
1858
1859   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1860
1861   spin_button->adjustment->lower = min;
1862   spin_button->adjustment->upper = max;
1863
1864   value = CLAMP (spin_button->adjustment->value,
1865                  spin_button->adjustment->lower,
1866                  (spin_button->adjustment->upper - spin_button->adjustment->page_size));
1867
1868   if (value != spin_button->adjustment->value)
1869     gtk_spin_button_set_value (spin_button, value);
1870
1871   gtk_adjustment_changed (spin_button->adjustment);
1872 }
1873
1874 /**
1875  * gtk_spin_button_get_range:
1876  * @spin_button: a #GtkSpinButton
1877  * @min: location to store minimum allowed value, or %NULL
1878  * @max: location to store maximum allowed value, or %NULL
1879  *
1880  * Gets the range allowed for @spin_button. See
1881  * gtk_spin_button_set_range().
1882  **/
1883 void
1884 gtk_spin_button_get_range (GtkSpinButton *spin_button,
1885                            gdouble       *min,
1886                            gdouble       *max)
1887 {
1888   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1889
1890   if (min)
1891     *min = spin_button->adjustment->lower;
1892   if (max)
1893     *max = spin_button->adjustment->upper;
1894 }
1895
1896 /**
1897  * gtk_spin_button_get_value:
1898  * @spin_button: a #GtkSpinButton
1899  *
1900  * Get the value in the @spin_button.
1901  *
1902  * Return value: the value of @spin_button
1903  **/
1904 gdouble
1905 gtk_spin_button_get_value (GtkSpinButton *spin_button)
1906 {
1907   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0.0);
1908
1909   return spin_button->adjustment->value;
1910 }
1911
1912 /**
1913  * gtk_spin_button_get_value_as_int:
1914  * @spin_button: a #GtkSpinButton
1915  *
1916  * Get the value @spin_button represented as an integer.
1917  *
1918  * Return value: the value of @spin_button
1919  **/
1920 gint
1921 gtk_spin_button_get_value_as_int (GtkSpinButton *spin_button)
1922 {
1923   gdouble val;
1924
1925   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1926
1927   val = spin_button->adjustment->value;
1928   if (val - floor (val) < ceil (val) - val)
1929     return floor (val);
1930   else
1931     return ceil (val);
1932 }
1933
1934 /**
1935  * gtk_spin_button_set_value:
1936  * @spin_button: a #GtkSpinButton
1937  * @value: the new value
1938  *
1939  * Set the value of @spin_button.
1940  **/
1941 void
1942 gtk_spin_button_set_value (GtkSpinButton *spin_button,
1943                            gdouble        value)
1944 {
1945   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1946
1947   if (fabs (value - spin_button->adjustment->value) > EPSILON)
1948     gtk_adjustment_set_value (spin_button->adjustment, value);
1949   else
1950     {
1951       gint return_val = FALSE;
1952       g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1953       if (return_val == FALSE)
1954         gtk_spin_button_default_output (spin_button);
1955     }
1956 }
1957
1958 /**
1959  * gtk_spin_button_set_update_policy:
1960  * @spin_button: a #GtkSpinButton
1961  * @policy: a #GtkSpinButtonUpdatePolicy value
1962  *
1963  * Sets the update behavior of a spin button. This determines whether the
1964  * spin button is always updated or only when a valid value is set.
1965  **/
1966 void
1967 gtk_spin_button_set_update_policy (GtkSpinButton             *spin_button,
1968                                    GtkSpinButtonUpdatePolicy  policy)
1969 {
1970   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1971
1972   if (spin_button->update_policy != policy)
1973     {
1974       spin_button->update_policy = policy;
1975       g_object_notify (G_OBJECT (spin_button), "update-policy");
1976     }
1977 }
1978
1979 /**
1980  * gtk_spin_button_get_update_policy:
1981  * @spin_button: a #GtkSpinButton
1982  *
1983  * Gets the update behavior of a spin button. See
1984  * gtk_spin_button_set_update_policy().
1985  *
1986  * Return value: the current update policy
1987  **/
1988 GtkSpinButtonUpdatePolicy
1989 gtk_spin_button_get_update_policy (GtkSpinButton *spin_button)
1990 {
1991   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), GTK_UPDATE_ALWAYS);
1992
1993   return spin_button->update_policy;
1994 }
1995
1996 /**
1997  * gtk_spin_button_set_numeric:
1998  * @spin_button: a #GtkSpinButton
1999  * @numeric: flag indicating if only numeric entry is allowed.
2000  *
2001  * Sets the flag that determines if non-numeric text can be typed into
2002  * the spin button.
2003  **/
2004 void
2005 gtk_spin_button_set_numeric (GtkSpinButton  *spin_button,
2006                              gboolean        numeric)
2007 {
2008   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2009
2010   numeric = numeric != FALSE;
2011
2012   if (spin_button->numeric != numeric)
2013     {
2014        spin_button->numeric = numeric;
2015        g_object_notify (G_OBJECT (spin_button), "numeric");
2016     }
2017 }
2018
2019 /**
2020  * gtk_spin_button_get_numeric:
2021  * @spin_button: a #GtkSpinButton
2022  *
2023  * Returns whether non-numeric text can be typed into the spin button.
2024  * See gtk_spin_button_set_numeric().
2025  *
2026  * Return value: %TRUE if only numeric text can be entered
2027  **/
2028 gboolean
2029 gtk_spin_button_get_numeric (GtkSpinButton *spin_button)
2030 {
2031   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2032
2033   return spin_button->numeric;
2034 }
2035
2036 /**
2037  * gtk_spin_button_set_wrap:
2038  * @spin_button: a #GtkSpinButton
2039  * @wrap: a flag indicating if wrapping behavior is performed.
2040  *
2041  * Sets the flag that determines if a spin button value wraps around to the
2042  * opposite limit when the upper or lower limit of the range is exceeded.
2043  **/
2044 void
2045 gtk_spin_button_set_wrap (GtkSpinButton  *spin_button,
2046                           gboolean        wrap)
2047 {
2048   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2049
2050   wrap = wrap != FALSE;
2051
2052   if (spin_button->wrap != wrap)
2053     {
2054        spin_button->wrap = (wrap != 0);
2055
2056        g_object_notify (G_OBJECT (spin_button), "wrap");
2057     }
2058 }
2059
2060 /**
2061  * gtk_spin_button_get_wrap:
2062  * @spin_button: a #GtkSpinButton
2063  *
2064  * Returns whether the spin button's value wraps around to the
2065  * opposite limit when the upper or lower limit of the range is
2066  * exceeded. See gtk_spin_button_set_wrap().
2067  *
2068  * Return value: %TRUE if the spin button wraps around
2069  **/
2070 gboolean
2071 gtk_spin_button_get_wrap (GtkSpinButton *spin_button)
2072 {
2073   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2074
2075   return spin_button->wrap;
2076 }
2077
2078 static gint
2079 spin_button_get_arrow_size (GtkSpinButton *spin_button)
2080 {
2081   gint size = pango_font_description_get_size (GTK_WIDGET (spin_button)->style->font_desc);
2082   gint arrow_size;
2083
2084   arrow_size = MAX (PANGO_PIXELS (size), MIN_ARROW_WIDTH);
2085
2086   return arrow_size - arrow_size % 2; /* force even */
2087 }
2088
2089 /**
2090  * spin_button_get_shadow_type:
2091  * @spin_button: a #GtkSpinButton
2092  *
2093  * Convenience function to Get the shadow type from the underlying widget's
2094  * style.
2095  *
2096  * Return value: the #GtkShadowType
2097  **/
2098 static gint
2099 spin_button_get_shadow_type (GtkSpinButton *spin_button)
2100 {
2101   GtkShadowType rc_shadow_type;
2102
2103   gtk_widget_style_get (GTK_WIDGET (spin_button), "shadow-type", &rc_shadow_type, NULL);
2104
2105   return rc_shadow_type;
2106 }
2107
2108 /**
2109  * gtk_spin_button_set_snap_to_ticks:
2110  * @spin_button: a #GtkSpinButton
2111  * @snap_to_ticks: a flag indicating if invalid values should be corrected.
2112  *
2113  * Sets the policy as to whether values are corrected to the nearest step
2114  * increment when a spin button is activated after providing an invalid value.
2115  **/
2116 void
2117 gtk_spin_button_set_snap_to_ticks (GtkSpinButton *spin_button,
2118                                    gboolean       snap_to_ticks)
2119 {
2120   guint new_val;
2121
2122   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2123
2124   new_val = (snap_to_ticks != 0);
2125
2126   if (new_val != spin_button->snap_to_ticks)
2127     {
2128       spin_button->snap_to_ticks = new_val;
2129       if (new_val && GTK_ENTRY (spin_button)->editable)
2130         gtk_spin_button_update (spin_button);
2131
2132       g_object_notify (G_OBJECT (spin_button), "snap-to-ticks");
2133     }
2134 }
2135
2136 /**
2137  * gtk_spin_button_get_snap_to_ticks:
2138  * @spin_button: a #GtkSpinButton
2139  *
2140  * Returns whether the values are corrected to the nearest step. See
2141  * gtk_spin_button_set_snap_to_ticks().
2142  *
2143  * Return value: %TRUE if values are snapped to the nearest step.
2144  **/
2145 gboolean
2146 gtk_spin_button_get_snap_to_ticks (GtkSpinButton *spin_button)
2147 {
2148   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2149
2150   return spin_button->snap_to_ticks;
2151 }
2152
2153 /**
2154  * gtk_spin_button_spin:
2155  * @spin_button: a #GtkSpinButton
2156  * @direction: a #GtkSpinType indicating the direction to spin.
2157  * @increment: step increment to apply in the specified direction.
2158  *
2159  * Increment or decrement a spin button's value in a specified direction
2160  * by a specified amount.
2161  **/
2162 void
2163 gtk_spin_button_spin (GtkSpinButton *spin_button,
2164                       GtkSpinType    direction,
2165                       gdouble        increment)
2166 {
2167   GtkAdjustment *adj;
2168   gdouble diff;
2169
2170   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2171
2172   adj = spin_button->adjustment;
2173
2174   /* for compatibility with the 1.0.x version of this function */
2175   if (increment != 0 && increment != adj->step_increment &&
2176       (direction == GTK_SPIN_STEP_FORWARD ||
2177        direction == GTK_SPIN_STEP_BACKWARD))
2178     {
2179       if (direction == GTK_SPIN_STEP_BACKWARD && increment > 0)
2180         increment = -increment;
2181       direction = GTK_SPIN_USER_DEFINED;
2182     }
2183
2184   switch (direction)
2185     {
2186     case GTK_SPIN_STEP_FORWARD:
2187
2188       gtk_spin_button_real_spin (spin_button, adj->step_increment);
2189       break;
2190
2191     case GTK_SPIN_STEP_BACKWARD:
2192
2193       gtk_spin_button_real_spin (spin_button, -adj->step_increment);
2194       break;
2195
2196     case GTK_SPIN_PAGE_FORWARD:
2197
2198       gtk_spin_button_real_spin (spin_button, adj->page_increment);
2199       break;
2200
2201     case GTK_SPIN_PAGE_BACKWARD:
2202
2203       gtk_spin_button_real_spin (spin_button, -adj->page_increment);
2204       break;
2205
2206     case GTK_SPIN_HOME:
2207
2208       diff = adj->value - adj->lower;
2209       if (diff > EPSILON)
2210         gtk_spin_button_real_spin (spin_button, -diff);
2211       break;
2212
2213     case GTK_SPIN_END:
2214
2215       diff = adj->upper - adj->value;
2216       if (diff > EPSILON)
2217         gtk_spin_button_real_spin (spin_button, diff);
2218       break;
2219
2220     case GTK_SPIN_USER_DEFINED:
2221
2222       if (increment != 0)
2223         gtk_spin_button_real_spin (spin_button, increment);
2224       break;
2225
2226     default:
2227       break;
2228     }
2229 }
2230
2231 /**
2232  * gtk_spin_button_update:
2233  * @spin_button: a #GtkSpinButton
2234  *
2235  * Manually force an update of the spin button.
2236  **/
2237 void
2238 gtk_spin_button_update (GtkSpinButton *spin_button)
2239 {
2240   gdouble val;
2241   gint error = 0;
2242   gint return_val;
2243
2244   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2245
2246   return_val = FALSE;
2247   g_signal_emit (spin_button, spinbutton_signals[INPUT], 0, &val, &return_val);
2248   if (return_val == FALSE)
2249     {
2250       return_val = gtk_spin_button_default_input (spin_button, &val);
2251       error = (return_val == GTK_INPUT_ERROR);
2252     }
2253   else if (return_val == GTK_INPUT_ERROR)
2254     error = 1;
2255
2256   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
2257
2258   if (spin_button->update_policy == GTK_UPDATE_ALWAYS)
2259     {
2260       if (val < spin_button->adjustment->lower)
2261         val = spin_button->adjustment->lower;
2262       else if (val > spin_button->adjustment->upper)
2263         val = spin_button->adjustment->upper;
2264     }
2265   else if ((spin_button->update_policy == GTK_UPDATE_IF_VALID) &&
2266            (error ||
2267            val < spin_button->adjustment->lower ||
2268            val > spin_button->adjustment->upper))
2269     {
2270       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
2271       return;
2272     }
2273
2274   if (spin_button->snap_to_ticks)
2275     gtk_spin_button_snap (spin_button, val);
2276   else
2277     gtk_spin_button_set_value (spin_button, val);
2278 }
2279
2280 #define __GTK_SPIN_BUTTON_C__
2281 #include "gtkaliasdef.c"