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 <stdio.h>
  31 #include <stdlib.h>
  32 #include <math.h>
  33 #include <string.h>
  34 #include <locale.h>
  35 #include "gdk/gdkkeysyms.h"
  36 #include "gtkspinbutton.h"
  37 #include "gtkmain.h"
  38 #include "gtksignal.h"
  39 #include "gtksettings.h"
  40 #include "gtkintl.h"
  41
  42 #define MIN_SPIN_BUTTON_WIDTH              30
  43 #define ARROW_SIZE                         11
  44 #define SPIN_BUTTON_INITIAL_TIMER_DELAY    200
  45 #define SPIN_BUTTON_TIMER_DELAY            20
  46 #define MAX_TEXT_LENGTH                    256
  47 #define MAX_TIMER_CALLS                    5
  48 #define EPSILON                            1e-5
  49
  50 enum {
  51   PROP_0,
  52   PROP_ADJUSTMENT,
  53   PROP_CLIMB_RATE,
  54   PROP_DIGITS,
  55   PROP_SNAP_TO_TICKS,
  56   PROP_NUMERIC,
  57   PROP_WRAP,
  58   PROP_UPDATE_POLICY,
  59   PROP_VALUE
  60 };
  61
  62 /* Signals */
  63 enum
  64 {
  65   INPUT,
  66   OUTPUT,
  67   VALUE_CHANGED,
  68   LAST_SIGNAL
  69 };
  70
  71 static void gtk_spin_button_class_init     (GtkSpinButtonClass *klass);
  72 static void gtk_spin_button_init           (GtkSpinButton      *spin_button);
  73 static void gtk_spin_button_finalize       (GObject            *object);
  74 static void gtk_spin_button_set_property   (GObject         *object,
  75                                             guint            prop_id,
  76                                             const GValue    *value,
  77                                             GParamSpec      *pspec);
  78 static void gtk_spin_button_get_property   (GObject         *object,
  79                                             guint            prop_id,
  80                                             GValue          *value,
  81                                             GParamSpec      *pspec);
  82 static void gtk_spin_button_map            (GtkWidget          *widget);
  83 static void gtk_spin_button_unmap          (GtkWidget          *widget);
  84 static void gtk_spin_button_realize        (GtkWidget          *widget);
  85 static void gtk_spin_button_unrealize      (GtkWidget          *widget);
  86 static void gtk_spin_button_size_request   (GtkWidget          *widget,
  87                                             GtkRequisition     *requisition);
  88 static void gtk_spin_button_size_allocate  (GtkWidget          *widget,
  89                                             GtkAllocation      *allocation);
  90 static gint gtk_spin_button_expose         (GtkWidget          *widget,
  91                                             GdkEventExpose     *event);
  92 static gint gtk_spin_button_button_press   (GtkWidget          *widget,
  93                                             GdkEventButton     *event);
  94 static gint gtk_spin_button_button_release (GtkWidget          *widget,
  95                                             GdkEventButton     *event);
  96 static gint gtk_spin_button_motion_notify  (GtkWidget          *widget,
  97                                             GdkEventMotion     *event);
  98 static gint gtk_spin_button_enter_notify   (GtkWidget          *widget,
  99                                             GdkEventCrossing   *event);
 100 static gint gtk_spin_button_leave_notify   (GtkWidget          *widget,
 101                                             GdkEventCrossing   *event);
 102 static gint gtk_spin_button_focus_out      (GtkWidget          *widget,
 103                                             GdkEventFocus      *event);
 104 static void gtk_spin_button_draw_arrow     (GtkSpinButton      *spin_button,
 105                                             guint               arrow);
 106 static gint gtk_spin_button_timer          (GtkSpinButton      *spin_button);
 107 static void gtk_spin_button_value_changed  (GtkAdjustment      *adjustment,
 108                                             GtkSpinButton      *spin_button);
 109 static gint gtk_spin_button_key_press      (GtkWidget          *widget,
 110                                             GdkEventKey        *event);
 111 static gint gtk_spin_button_key_release    (GtkWidget          *widget,
 112                                             GdkEventKey        *event);
 113 static gint gtk_spin_button_scroll         (GtkWidget          *widget,
 114                                             GdkEventScroll     *event);
 115 static void gtk_spin_button_activate       (GtkEntry           *entry);
 116 static void gtk_spin_button_snap           (GtkSpinButton      *spin_button,
 117                                             gdouble             val);
 118 static void gtk_spin_button_insert_text    (GtkEntry           *entry,
 119                                             const gchar        *new_text,
 120                                             gint                new_text_length,
 121                                             gint               *position);
 122 static void gtk_spin_button_real_spin      (GtkSpinButton      *spin_button,
 123                                             gdouble             step);
 124 static gint gtk_spin_button_default_input  (GtkSpinButton      *spin_button,
 125                                             gdouble            *new_val);
 126 static gint gtk_spin_button_default_output (GtkSpinButton      *spin_button);
 127 static gint spin_button_get_shadow_type    (GtkSpinButton      *spin_button);
 128
 129
 130 static GtkEntryClass *parent_class = NULL;
 131 static guint spinbutton_signals[LAST_SIGNAL] = {0};
 132
 133
 134 GtkType
 135 gtk_spin_button_get_type (void)
 136 {
 137   static guint spin_button_type = 0;
 138
 139   if (!spin_button_type)
 140     {
 141       static const GtkTypeInfo spin_button_info =
 142       {
 143         "GtkSpinButton",
 144         sizeof (GtkSpinButton),
 145         sizeof (GtkSpinButtonClass),
 146         (GtkClassInitFunc) gtk_spin_button_class_init,
 147         (GtkObjectInitFunc) gtk_spin_button_init,
 148         /* reserved_1 */ NULL,
 149         /* reserved_2 */ NULL,
 150         (GtkClassInitFunc) NULL,
 151       };
 152
 153       spin_button_type = gtk_type_unique (GTK_TYPE_ENTRY, &spin_button_info);
 154     }
 155   return spin_button_type;
 156 }
 157
 158 static void
 159 gtk_spin_button_class_init (GtkSpinButtonClass *class)
 160 {
 161   GObjectClass     *gobject_class = G_OBJECT_CLASS (class);
 162   GtkObjectClass   *object_class;
 163   GtkWidgetClass   *widget_class;
 164   GtkEntryClass    *entry_class;
 165
 166   object_class   = (GtkObjectClass*)   class;
 167   widget_class   = (GtkWidgetClass*)   class;
 168   entry_class    = (GtkEntryClass*)    class;
 169
 170   parent_class = gtk_type_class (GTK_TYPE_ENTRY);
 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   widget_class->map = gtk_spin_button_map;
 178   widget_class->unmap = gtk_spin_button_unmap;
 179   widget_class->realize = gtk_spin_button_realize;
 180   widget_class->unrealize = gtk_spin_button_unrealize;
 181   widget_class->size_request = gtk_spin_button_size_request;
 182   widget_class->size_allocate = gtk_spin_button_size_allocate;
 183   widget_class->expose_event = gtk_spin_button_expose;
 184   widget_class->scroll_event = gtk_spin_button_scroll;
 185   widget_class->button_press_event = gtk_spin_button_button_press;
 186   widget_class->button_release_event = gtk_spin_button_button_release;
 187   widget_class->motion_notify_event = gtk_spin_button_motion_notify;
 188   widget_class->key_press_event = gtk_spin_button_key_press;
 189   widget_class->key_release_event = gtk_spin_button_key_release;
 190   widget_class->enter_notify_event = gtk_spin_button_enter_notify;
 191   widget_class->leave_notify_event = gtk_spin_button_leave_notify;
 192   widget_class->focus_out_event = gtk_spin_button_focus_out;
 193
 194   entry_class->insert_text = gtk_spin_button_insert_text;
 195   entry_class->activate = gtk_spin_button_activate;
 196
 197   class->input = NULL;
 198   class->output = NULL;
 199
 200   g_object_class_install_property (gobject_class,
 201                                    PROP_ADJUSTMENT,
 202                                    g_param_spec_object ("adjustment",
 203                                                         _("Adjustment"),
 204                                                         _("The adjustment that holds the value of the spinbutton"),
 205                                                         GTK_TYPE_ADJUSTMENT,
 206                                                         G_PARAM_READWRITE));
 207
 208   g_object_class_install_property (gobject_class,
 209                                    PROP_CLIMB_RATE,
 210                                    g_param_spec_double ("climb_rate",
 211                                                         _("Climb Rate"),
 212                                                         _("The acceleration rate when you hold down a button"),
 213                                                         0.0,
 214                                                         G_MAXDOUBLE,
 215                                                         0.0,
 216                                                         G_PARAM_READWRITE));
 217
 218   g_object_class_install_property (gobject_class,
 219                                    PROP_DIGITS,
 220                                    g_param_spec_uint ("digits",
 221                                                       _("Digits"),
 222                                                       _("The number of decimal places to display"),
 223                                                       0,
 224                                                       5,
 225                                                       0,
 226                                                       G_PARAM_READWRITE));
 227
 228   g_object_class_install_property (gobject_class,
 229                                    PROP_SNAP_TO_TICKS,
 230                                    g_param_spec_boolean ("snap_to_ticks",
 231                                                          _("Snap to Ticks"),
 232                                                          _("Whether erroneous values are automatically changed to a spin button's nearest step increment"),
 233                                                          FALSE,
 234                                                          G_PARAM_READWRITE));
 235
 236   g_object_class_install_property (gobject_class,
 237                                    PROP_NUMERIC,
 238                                    g_param_spec_boolean ("numeric",
 239                                                          _("Numeric"),
 240                                                          _("Whether non-numeric characters should be ignored"),
 241                                                          FALSE,
 242                                                          G_PARAM_READWRITE));
 243
 244   g_object_class_install_property (gobject_class,
 245                                    PROP_WRAP,
 246                                    g_param_spec_boolean ("wrap",
 247                                                          _("Wrap"),
 248                                                          _("Whether a spin button should wrap upon reaching its limits"),
 249                                                          FALSE,
 250                                                          G_PARAM_READWRITE));
 251
 252   g_object_class_install_property (gobject_class,
 253                                    PROP_UPDATE_POLICY,
 254                                    g_param_spec_enum ("update_policy",
 255                                                       _("Update Policy"),
 256                                                       _("Whether the spin button should update always, or only when the value is legal"),
 257                                                       GTK_TYPE_SPIN_BUTTON_UPDATE_POLICY,
 258                                                       GTK_UPDATE_ALWAYS,
 259                                                       G_PARAM_READWRITE));
 260
 261   g_object_class_install_property (gobject_class,
 262                                    PROP_VALUE,
 263                                    g_param_spec_double ("value",
 264                                                         _("Value"),
 265                                                         _("Reads the current value, or sets a new value"),
 266                                                         -G_MAXDOUBLE,
 267                                                         G_MAXDOUBLE,
 268                                                         0.0,
 269                                                         G_PARAM_READWRITE));
 270
 271   gtk_widget_class_install_style_property_parser (widget_class,
 272                                                   g_param_spec_enum ("shadow_type", "Shadow Type", NULL,
 273                                                                      GTK_TYPE_SHADOW_TYPE,
 274                                                                      GTK_SHADOW_IN,
 275                                                                      G_PARAM_READABLE),
 276                                                   gtk_rc_property_parse_enum);
 277   spinbutton_signals[INPUT] =
 278     gtk_signal_new ("input",
 279                     GTK_RUN_LAST,
 280                     GTK_CLASS_TYPE (object_class),
 281                     GTK_SIGNAL_OFFSET (GtkSpinButtonClass, input),
 282                     gtk_marshal_INT__POINTER,
 283                     GTK_TYPE_INT, 1, GTK_TYPE_POINTER);
 284
 285   spinbutton_signals[OUTPUT] =
 286     g_signal_newc ("output",
 287                    G_TYPE_FROM_CLASS(object_class),
 288                    G_SIGNAL_RUN_LAST,
 289                    G_STRUCT_OFFSET(GtkSpinButtonClass, output),
 290                    _gtk_boolean_handled_accumulator, NULL,
 291                    gtk_marshal_BOOLEAN__VOID,
 292                    G_TYPE_BOOLEAN, 0);
 293
 294   spinbutton_signals[VALUE_CHANGED] =
 295     gtk_signal_new ("value_changed",
 296                     GTK_RUN_LAST,
 297                     GTK_CLASS_TYPE (object_class),
 298                     GTK_SIGNAL_OFFSET (GtkSpinButtonClass, value_changed),
 299                     gtk_marshal_VOID__VOID,
 300                     GTK_TYPE_NONE, 0);
 301 }
 302
 303 static void
 304 gtk_spin_button_set_property (GObject      *object,
 305                               guint         prop_id,
 306                               const GValue *value,
 307                               GParamSpec   *pspec)
 308 {
 309   GtkSpinButton *spin_button;
 310
 311   spin_button = GTK_SPIN_BUTTON (object);
 312
 313   switch (prop_id)
 314     {
 315       GtkAdjustment *adjustment;
 316
 317     case PROP_ADJUSTMENT:
 318       adjustment = GTK_ADJUSTMENT (g_value_get_object (value));
 319       if (!adjustment)
 320         adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 321       gtk_spin_button_set_adjustment (spin_button, adjustment);
 322       break;
 323     case PROP_CLIMB_RATE:
 324       gtk_spin_button_configure (spin_button,
 325                                  spin_button->adjustment,
 326                                  g_value_get_double (value),
 327                                  spin_button->digits);
 328       break;
 329     case PROP_DIGITS:
 330       gtk_spin_button_configure (spin_button,
 331                                  spin_button->adjustment,
 332                                  spin_button->climb_rate,
 333                                  g_value_get_uint (value));
 334       break;
 335     case PROP_SNAP_TO_TICKS:
 336       gtk_spin_button_set_snap_to_ticks (spin_button, g_value_get_boolean (value));
 337       break;
 338     case PROP_NUMERIC:
 339       gtk_spin_button_set_numeric (spin_button, g_value_get_boolean (value));
 340       break;
 341     case PROP_WRAP:
 342       gtk_spin_button_set_wrap (spin_button, g_value_get_boolean (value));
 343       break;
 344     case PROP_UPDATE_POLICY:
 345       gtk_spin_button_set_update_policy (spin_button, g_value_get_enum (value));
 346       break;
 347     case PROP_VALUE:
 348       gtk_spin_button_set_value (spin_button, g_value_get_double (value));
 349       break;
 350     default:
 351       break;
 352     }
 353 }
 354
 355 static void
 356 gtk_spin_button_get_property (GObject      *object,
 357                               guint         prop_id,
 358                               GValue       *value,
 359                               GParamSpec   *pspec)
 360 {
 361   GtkSpinButton *spin_button;
 362
 363   spin_button = GTK_SPIN_BUTTON (object);
 364
 365   switch (prop_id)
 366     {
 367     case PROP_ADJUSTMENT:
 368       g_value_set_object (value, G_OBJECT (spin_button->adjustment));
 369       break;
 370     case PROP_CLIMB_RATE:
 371       g_value_set_double (value, spin_button->climb_rate);
 372       break;
 373     case PROP_DIGITS:
 374       g_value_set_uint (value, spin_button->digits);
 375       break;
 376     case PROP_SNAP_TO_TICKS:
 377       g_value_set_boolean (value, spin_button->snap_to_ticks);
 378       break;
 379     case PROP_NUMERIC:
 380       g_value_set_boolean (value, spin_button->numeric);
 381       break;
 382     case PROP_WRAP:
 383       g_value_set_boolean (value, spin_button->wrap);
 384       break;
 385     case PROP_UPDATE_POLICY:
 386       g_value_set_enum (value, spin_button->update_policy);
 387       break;
 388      case PROP_VALUE:
 389        g_value_set_double (value, spin_button->adjustment->value);
 390       break;
 391     default:
 392       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 393       break;
 394     }
 395 }
 396
 397 static void
 398 gtk_spin_button_init (GtkSpinButton *spin_button)
 399 {
 400   spin_button->adjustment = NULL;
 401   spin_button->panel = NULL;
 402   spin_button->timer = 0;
 403   spin_button->ev_time = 0;
 404   spin_button->climb_rate = 0.0;
 405   spin_button->timer_step = 0.0;
 406   spin_button->update_policy = GTK_UPDATE_ALWAYS;
 407   spin_button->in_child = 2;
 408   spin_button->click_child = 2;
 409   spin_button->button = 0;
 410   spin_button->need_timer = FALSE;
 411   spin_button->timer_calls = 0;
 412   spin_button->digits = 0;
 413   spin_button->numeric = FALSE;
 414   spin_button->wrap = FALSE;
 415   spin_button->snap_to_ticks = FALSE;
 416   gtk_spin_button_set_adjustment (spin_button,
 417           (GtkAdjustment*) gtk_adjustment_new (0, 0, 0, 0, 0, 0));
 418 }
 419
 420 static void
 421 gtk_spin_button_finalize (GObject *object)
 422 {
 423   g_return_if_fail (GTK_IS_SPIN_BUTTON (object));
 424
 425   gtk_object_unref (GTK_OBJECT (GTK_SPIN_BUTTON (object)->adjustment));
 426
 427   G_OBJECT_CLASS (parent_class)->finalize (object);
 428 }
 429
 430 static void
 431 gtk_spin_button_map (GtkWidget *widget)
 432 {
 433   g_return_if_fail (widget != NULL);
 434   g_return_if_fail (GTK_IS_SPIN_BUTTON (widget));
 435
 436   if (GTK_WIDGET_REALIZED (widget) && !GTK_WIDGET_MAPPED (widget))
 437     {
 438       GTK_WIDGET_CLASS (parent_class)->map (widget);
 439       gdk_window_show (GTK_SPIN_BUTTON (widget)->panel);
 440     }
 441 }
 442
 443 static void
 444 gtk_spin_button_unmap (GtkWidget *widget)
 445 {
 446   g_return_if_fail (widget != NULL);
 447   g_return_if_fail (GTK_IS_SPIN_BUTTON (widget));
 448
 449   if (GTK_WIDGET_MAPPED (widget))
 450     {
 451       gdk_window_hide (GTK_SPIN_BUTTON (widget)->panel);
 452       GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 453     }
 454 }
 455
 456 static void
 457 gtk_spin_button_realize (GtkWidget *widget)
 458 {
 459   GtkSpinButton *spin_button;
 460   GdkWindowAttr attributes;
 461   gint attributes_mask;
 462   guint real_width;
 463   gint return_val;
 464
 465   g_return_if_fail (widget != NULL);
 466   g_return_if_fail (GTK_IS_SPIN_BUTTON (widget));
 467
 468   spin_button = GTK_SPIN_BUTTON (widget);
 469
 470   real_width = widget->allocation.width;
 471   widget->allocation.width -= ARROW_SIZE + 2 * widget->style->xthickness;
 472   gtk_widget_set_events (widget, gtk_widget_get_events (widget) |
 473                          GDK_KEY_RELEASE_MASK);
 474   GTK_WIDGET_CLASS (parent_class)->realize (widget);
 475
 476   widget->allocation.width = real_width;
 477
 478   attributes.window_type = GDK_WINDOW_CHILD;
 479   attributes.wclass = GDK_INPUT_OUTPUT;
 480   attributes.visual = gtk_widget_get_visual (widget);
 481   attributes.colormap = gtk_widget_get_colormap (widget);
 482   attributes.event_mask = gtk_widget_get_events (widget);
 483   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK
 484     | GDK_BUTTON_RELEASE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_ENTER_NOTIFY_MASK
 485     | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK;
 486
 487   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 488
 489   attributes.x = (widget->allocation.x + widget->allocation.width - ARROW_SIZE -
 490                   2 * widget->style->xthickness);
 491   attributes.y = widget->allocation.y + (widget->allocation.height -
 492                                          widget->requisition.height) / 2;
 493   attributes.width = ARROW_SIZE + 2 * widget->style->xthickness;
 494   attributes.height = widget->requisition.height;
 495
 496   spin_button->panel = gdk_window_new (gtk_widget_get_parent_window (widget),
 497                                        &attributes, attributes_mask);
 498   gdk_window_set_user_data (spin_button->panel, widget);
 499
 500   gtk_style_set_background (widget->style, spin_button->panel, GTK_STATE_NORMAL);
 501
 502   return_val = FALSE;
 503   gtk_signal_emit (GTK_OBJECT (spin_button), spinbutton_signals[OUTPUT],
 504                    &return_val);
 505   if (return_val == FALSE)
 506     gtk_spin_button_default_output (spin_button);
 507 }
 508
 509 static void
 510 gtk_spin_button_unrealize (GtkWidget *widget)
 511 {
 512   GtkSpinButton *spin;
 513
 514   g_return_if_fail (widget != NULL);
 515   g_return_if_fail (GTK_IS_SPIN_BUTTON (widget));
 516
 517   spin = GTK_SPIN_BUTTON (widget);
 518
 519   GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
 520
 521   if (spin->panel)
 522     {
 523       gdk_window_set_user_data (spin->panel, NULL);
 524       gdk_window_destroy (spin->panel);
 525       spin->panel = NULL;
 526     }
 527 }
 528
 529 static int
 530 compute_double_length (double val, double step)
 531 {
 532   int a, b;
 533   int extra;
 534
 535   a = 1;
 536   if (fabs (val) > 1.0)
 537     a = floor (log10 (fabs (val))) + 1;
 538
 539   b = 0;
 540   if (fabs (step) < 1.0 && step != 0.0)
 541     b = ceil (-log10 (fabs (step)));
 542
 543   extra = 0;
 544
 545   /* The dot: */
 546   if (b > 0)
 547     extra++;
 548
 549   /* The sign: */
 550   if (val < 0)
 551     extra++;
 552
 553   return a + b + extra;
 554 }
 555
 556 static void
 557 gtk_spin_button_size_request (GtkWidget      *widget,
 558                               GtkRequisition *requisition)
 559 {
 560   GtkEntry *entry;
 561   GtkSpinButton *spin_button;
 562
 563   g_return_if_fail (widget != NULL);
 564   g_return_if_fail (requisition != NULL);
 565   g_return_if_fail (GTK_IS_SPIN_BUTTON (widget));
 566
 567   entry = GTK_ENTRY (widget);
 568   spin_button = GTK_SPIN_BUTTON (widget);
 569
 570   GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
 571
 572   if (entry->width_chars < 0)
 573     {
 574       PangoFontMetrics metrics;
 575       PangoFont *font;
 576       gchar *lang;
 577       gint width;
 578       gint w;
 579       int string_len;
 580
 581
 582       font = pango_context_load_font (gtk_widget_get_pango_context (widget),
 583                                       widget->style->font_desc);
 584       lang = pango_context_get_lang (gtk_widget_get_pango_context (widget));
 585       pango_font_get_metrics (font, lang, &metrics);
 586       g_free (lang);
 587       g_object_unref (G_OBJECT (font));
 588
 589       /* Get max of MIN_SPIN_BUTTON_WIDTH, size of upper, size of lower */
 590
 591       width = MIN_SPIN_BUTTON_WIDTH;
 592
 593       string_len = compute_double_length (spin_button->adjustment->upper,
 594                                           spin_button->adjustment->step_increment);
 595       w = MIN (string_len, 10) * PANGO_PIXELS (metrics.approximate_digit_width);
 596       width = MAX (width, w);
 597       string_len = compute_double_length (spin_button->adjustment->lower,
 598                                           spin_button->adjustment->step_increment);
 599       w = MIN (string_len, 10) * PANGO_PIXELS (metrics.approximate_digit_width);
 600       width = MAX (width, w);
 601
 602       requisition->width = width + ARROW_SIZE + 2 * widget->style->xthickness;
 603     }
 604   else
 605     requisition->width += ARROW_SIZE + 2 * widget->style->xthickness;
 606 }
 607
 608 static void
 609 gtk_spin_button_size_allocate (GtkWidget     *widget,
 610                                GtkAllocation *allocation)
 611 {
 612   GtkAllocation child_allocation;
 613
 614   g_return_if_fail (widget != NULL);
 615   g_return_if_fail (GTK_IS_SPIN_BUTTON (widget));
 616   g_return_if_fail (allocation != NULL);
 617
 618   child_allocation = *allocation;
 619   if (child_allocation.width > ARROW_SIZE + 2 * widget->style->xthickness)
 620     child_allocation.width -= ARROW_SIZE + 2 * widget->style->xthickness;
 621
 622   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 623     child_allocation.x += ARROW_SIZE + 2 * widget->style->xthickness;
 624
 625   GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, &child_allocation);
 626
 627   widget->allocation = *allocation;
 628
 629   if (GTK_WIDGET_REALIZED (widget))
 630     {
 631       child_allocation.width = ARROW_SIZE + 2 * widget->style->xthickness;
 632       child_allocation.height = widget->requisition.height;
 633
 634       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 635         child_allocation.x = (allocation->x + allocation->width - ARROW_SIZE -
 636                               2 * widget->style->xthickness);
 637       else
 638         child_allocation.x = allocation->x;
 639
 640       child_allocation.y = allocation->y + (allocation->height - widget->requisition.height) / 2;
 641
 642       gdk_window_move_resize (GTK_SPIN_BUTTON (widget)->panel,
 643                               child_allocation.x,
 644                               child_allocation.y,
 645                               child_allocation.width,
 646                               child_allocation.height);
 647     }
 648 }
 649
 650 static gint
 651 gtk_spin_button_expose (GtkWidget      *widget,
 652                         GdkEventExpose *event)
 653 {
 654   GtkSpinButton *spin;
 655
 656   g_return_val_if_fail (widget != NULL, FALSE);
 657   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 658   g_return_val_if_fail (event != NULL, FALSE);
 659
 660   spin = GTK_SPIN_BUTTON (widget);
 661
 662   if (GTK_WIDGET_DRAWABLE (widget))
 663     {
 664       GtkShadowType shadow_type;
 665
 666       /* FIXME this seems like really broken code -
 667        * why aren't we looking at event->window
 668        * and acting accordingly?
 669        */
 670
 671       shadow_type = spin_button_get_shadow_type (spin);
 672       if (shadow_type != GTK_SHADOW_NONE)
 673         gtk_paint_box (widget->style, spin->panel,
 674                        GTK_STATE_NORMAL, shadow_type,
 675                        &event->area, widget, "spinbutton",
 676                        0, 0,
 677                        ARROW_SIZE + 2 * widget->style->xthickness,
 678                        widget->requisition.height);
 679       else
 680          {
 681             gdk_window_set_back_pixmap (spin->panel, NULL, TRUE);
 682             gdk_window_clear_area (spin->panel,
 683                                    event->area.x, event->area.y,
 684                                    event->area.width, event->area.height);
 685          }
 686        gtk_spin_button_draw_arrow (spin, GTK_ARROW_UP);
 687        gtk_spin_button_draw_arrow (spin, GTK_ARROW_DOWN);
 688
 689        GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 690     }
 691
 692   return FALSE;
 693 }
 694
 695 static void
 696 gtk_spin_button_draw_arrow (GtkSpinButton *spin_button,
 697                             guint          arrow)
 698 {
 699   GtkShadowType spin_shadow_type;
 700   GtkStateType state_type;
 701   GtkShadowType shadow_type;
 702   GtkWidget *widget;
 703   gint x;
 704   gint y;
 705
 706   g_return_if_fail (spin_button != NULL);
 707   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
 708
 709   widget = GTK_WIDGET (spin_button);
 710   spin_shadow_type = spin_button_get_shadow_type (spin_button);
 711
 712   if (GTK_WIDGET_DRAWABLE (spin_button))
 713     {
 714       if (!spin_button->wrap &&
 715           (((arrow == GTK_ARROW_UP &&
 716           (spin_button->adjustment->upper - spin_button->adjustment->value
 717            <= EPSILON))) ||
 718           ((arrow == GTK_ARROW_DOWN &&
 719           (spin_button->adjustment->value - spin_button->adjustment->lower
 720            <= EPSILON)))))
 721         {
 722           shadow_type = GTK_SHADOW_ETCHED_IN;
 723           state_type = GTK_STATE_NORMAL;
 724         }
 725       else
 726         {
 727           if (spin_button->in_child == arrow)
 728             {
 729               if (spin_button->click_child == arrow)
 730                 state_type = GTK_STATE_ACTIVE;
 731               else
 732                 state_type = GTK_STATE_PRELIGHT;
 733             }
 734           else
 735             state_type = GTK_STATE_NORMAL;
 736
 737           if (spin_button->click_child == arrow)
 738             shadow_type = GTK_SHADOW_IN;
 739           else
 740             shadow_type = GTK_SHADOW_OUT;
 741         }
 742       if (arrow == GTK_ARROW_UP)
 743         {
 744           if (spin_shadow_type != GTK_SHADOW_NONE)
 745             {
 746               x = widget->style->xthickness;
 747               y = widget->style->ythickness;
 748             }
 749           else
 750             {
 751               x = widget->style->xthickness - 1;
 752               y = widget->style->ythickness - 1;
 753             }
 754           gtk_paint_arrow (widget->style, spin_button->panel,
 755                            state_type, shadow_type,
 756                            NULL, widget, "spinbutton",
 757                            arrow, TRUE,
 758                            x, y, ARROW_SIZE, widget->requisition.height / 2
 759                            - widget->style->ythickness);
 760         }
 761       else
 762         {
 763           if (spin_shadow_type != GTK_SHADOW_NONE)
 764             {
 765               x = widget->style->xthickness;
 766               y = widget->requisition.height / 2;
 767             }
 768           else
 769             {
 770               x = widget->style->xthickness - 1;
 771               y = widget->requisition.height / 2 + 1;
 772             }
 773           gtk_paint_arrow (widget->style, spin_button->panel,
 774                            state_type, shadow_type,
 775                            NULL, widget, "spinbutton",
 776                            arrow, TRUE,
 777                            x, y, ARROW_SIZE, widget->requisition.height / 2
 778                            - widget->style->ythickness);
 779         }
 780     }
 781 }
 782
 783 static gint
 784 gtk_spin_button_enter_notify (GtkWidget        *widget,
 785                               GdkEventCrossing *event)
 786 {
 787   GtkSpinButton *spin;
 788
 789   g_return_val_if_fail (widget != NULL, FALSE);
 790   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 791   g_return_val_if_fail (event != NULL, FALSE);
 792
 793   spin = GTK_SPIN_BUTTON (widget);
 794
 795   if (event->window == spin->panel)
 796     {
 797       gint x;
 798       gint y;
 799
 800       gdk_window_get_pointer (spin->panel, &x, &y, NULL);
 801
 802       if (y <= widget->requisition.height / 2)
 803         {
 804           spin->in_child = GTK_ARROW_UP;
 805           if (spin->click_child == 2)
 806             gtk_spin_button_draw_arrow (spin, GTK_ARROW_UP);
 807         }
 808       else
 809         {
 810           spin->in_child = GTK_ARROW_DOWN;
 811           if (spin->click_child == 2)
 812             gtk_spin_button_draw_arrow (spin, GTK_ARROW_DOWN);
 813         }
 814     }
 815   return FALSE;
 816 }
 817
 818 static gint
 819 gtk_spin_button_leave_notify (GtkWidget        *widget,
 820                               GdkEventCrossing *event)
 821 {
 822   GtkSpinButton *spin;
 823
 824   g_return_val_if_fail (widget != NULL, FALSE);
 825   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 826   g_return_val_if_fail (event != NULL, FALSE);
 827
 828   spin = GTK_SPIN_BUTTON (widget);
 829
 830   if (event->window == spin->panel && spin->click_child == 2)
 831     {
 832       if (spin->in_child == GTK_ARROW_UP)
 833         {
 834           spin->in_child = 2;
 835           gtk_spin_button_draw_arrow (spin, GTK_ARROW_UP);
 836         }
 837       else
 838         {
 839           spin->in_child = 2;
 840           gtk_spin_button_draw_arrow (spin, GTK_ARROW_DOWN);
 841         }
 842     }
 843   return FALSE;
 844 }
 845
 846 static gint
 847 gtk_spin_button_focus_out (GtkWidget     *widget,
 848                            GdkEventFocus *event)
 849 {
 850   g_return_val_if_fail (widget != NULL, FALSE);
 851   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 852   g_return_val_if_fail (event != NULL, FALSE);
 853
 854   if (GTK_ENTRY (widget)->editable)
 855     gtk_spin_button_update (GTK_SPIN_BUTTON (widget));
 856
 857   return GTK_WIDGET_CLASS (parent_class)->focus_out_event (widget, event);
 858 }
 859
 860 static gint
 861 gtk_spin_button_scroll (GtkWidget      *widget,
 862                         GdkEventScroll *event)
 863 {
 864   GtkSpinButton *spin;
 865
 866   g_return_val_if_fail (widget != NULL, FALSE);
 867   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 868   g_return_val_if_fail (event != NULL, FALSE);
 869
 870   spin = GTK_SPIN_BUTTON (widget);
 871
 872   if (event->direction == GDK_SCROLL_UP)
 873     {
 874       if (!GTK_WIDGET_HAS_FOCUS (widget))
 875         gtk_widget_grab_focus (widget);
 876       gtk_spin_button_real_spin (spin, spin->adjustment->step_increment);
 877     }
 878   else if (event->direction == GDK_SCROLL_DOWN)
 879     {
 880       if (!GTK_WIDGET_HAS_FOCUS (widget))
 881         gtk_widget_grab_focus (widget);
 882       gtk_spin_button_real_spin (spin, -spin->adjustment->step_increment);
 883     }
 884   else
 885     return FALSE;
 886
 887   return TRUE;
 888 }
 889
 890 static gint
 891 gtk_spin_button_button_press (GtkWidget      *widget,
 892                               GdkEventButton *event)
 893 {
 894   GtkSpinButton *spin;
 895
 896   g_return_val_if_fail (widget != NULL, FALSE);
 897   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 898   g_return_val_if_fail (event != NULL, FALSE);
 899
 900   spin = GTK_SPIN_BUTTON (widget);
 901
 902   if (!spin->button)
 903     {
 904       if (event->window == spin->panel)
 905         {
 906           if (!GTK_WIDGET_HAS_FOCUS (widget))
 907             gtk_widget_grab_focus (widget);
 908           gtk_grab_add (widget);
 909           spin->button = event->button;
 910
 911           if (GTK_ENTRY (widget)->editable)
 912             gtk_spin_button_update (spin);
 913
 914           if (event->y <= widget->requisition.height / 2)
 915             {
 916               spin->click_child = GTK_ARROW_UP;
 917               if (event->button == 1)
 918                 {
 919                  gtk_spin_button_real_spin (spin,
 920                                             spin->adjustment->step_increment);
 921                   if (!spin->timer)
 922                     {
 923                       spin->timer_step = spin->adjustment->step_increment;
 924                       spin->need_timer = TRUE;
 925                       spin->timer = gtk_timeout_add
 926                         (SPIN_BUTTON_INITIAL_TIMER_DELAY,
 927                          (GtkFunction) gtk_spin_button_timer, (gpointer) spin);
 928                     }
 929                 }
 930               else if (event->button == 2)
 931                 {
 932                  gtk_spin_button_real_spin (spin,
 933                                             spin->adjustment->page_increment);
 934                   if (!spin->timer)
 935                     {
 936                       spin->timer_step = spin->adjustment->page_increment;
 937                       spin->need_timer = TRUE;
 938                       spin->timer = gtk_timeout_add
 939                         (SPIN_BUTTON_INITIAL_TIMER_DELAY,
 940                          (GtkFunction) gtk_spin_button_timer, (gpointer) spin);
 941                     }
 942                 }
 943               gtk_spin_button_draw_arrow (spin, GTK_ARROW_UP);
 944             }
 945           else
 946             {
 947               spin->click_child = GTK_ARROW_DOWN;
 948               if (event->button == 1)
 949                 {
 950                   gtk_spin_button_real_spin (spin,
 951                                              -spin->adjustment->step_increment);
 952                   if (!spin->timer)
 953                     {
 954                       spin->timer_step = spin->adjustment->step_increment;
 955                       spin->need_timer = TRUE;
 956                       spin->timer = gtk_timeout_add
 957                         (SPIN_BUTTON_INITIAL_TIMER_DELAY,
 958                          (GtkFunction) gtk_spin_button_timer, (gpointer) spin);
 959                     }
 960                 }
 961               else if (event->button == 2)
 962                 {
 963                   gtk_spin_button_real_spin (spin,
 964                                              -spin->adjustment->page_increment);
 965                   if (!spin->timer)
 966                     {
 967                       spin->timer_step = spin->adjustment->page_increment;
 968                       spin->need_timer = TRUE;
 969                       spin->timer = gtk_timeout_add
 970                         (SPIN_BUTTON_INITIAL_TIMER_DELAY,
 971                          (GtkFunction) gtk_spin_button_timer, (gpointer) spin);
 972                     }
 973                 }
 974               gtk_spin_button_draw_arrow (spin, GTK_ARROW_DOWN);
 975             }
 976           return TRUE;
 977         }
 978       else
 979         return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, event);
 980     }
 981   return FALSE;
 982 }
 983
 984 static gint
 985 gtk_spin_button_button_release (GtkWidget      *widget,
 986                                 GdkEventButton *event)
 987 {
 988   GtkSpinButton *spin;
 989
 990   g_return_val_if_fail (widget != NULL, FALSE);
 991   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
 992   g_return_val_if_fail (event != NULL, FALSE);
 993
 994   spin = GTK_SPIN_BUTTON (widget);
 995
 996   if (event->button == spin->button)
 997     {
 998       guint click_child;
 999
1000       if (spin->timer)
1001         {
1002           gtk_timeout_remove (spin->timer);
1003           spin->timer = 0;
1004           spin->timer_calls = 0;
1005           spin->need_timer = FALSE;
1006         }
1007
1008       if (event->button == 3)
1009         {
1010           if (event->y >= 0 && event->x >= 0 &&
1011               event->y <= widget->requisition.height &&
1012               event->x <= ARROW_SIZE + 2 * widget->style->xthickness)
1013             {
1014               if (spin->click_child == GTK_ARROW_UP &&
1015                   event->y <= widget->requisition.height / 2)
1016                 {
1017                   gdouble diff;
1018
1019                   diff = spin->adjustment->upper - spin->adjustment->value;
1020                   if (diff > EPSILON)
1021                     gtk_spin_button_real_spin (spin, diff);
1022                 }
1023               else if (spin->click_child == GTK_ARROW_DOWN &&
1024                        event->y > widget->requisition.height / 2)
1025                 {
1026                   gdouble diff;
1027
1028                   diff = spin->adjustment->value - spin->adjustment->lower;
1029                   if (diff > EPSILON)
1030                     gtk_spin_button_real_spin (spin, -diff);
1031                 }
1032             }
1033         }
1034       gtk_grab_remove (widget);
1035       click_child = spin->click_child;
1036       spin->click_child = 2;
1037       spin->button = 0;
1038       gtk_spin_button_draw_arrow (spin, click_child);
1039       return TRUE;
1040     }
1041   else
1042     return GTK_WIDGET_CLASS (parent_class)->button_release_event (widget, event);
1043
1044   return FALSE;
1045 }
1046
1047 static gint
1048 gtk_spin_button_motion_notify (GtkWidget      *widget,
1049                                GdkEventMotion *event)
1050 {
1051   GtkSpinButton *spin;
1052
1053   g_return_val_if_fail (widget != NULL, FALSE);
1054   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
1055   g_return_val_if_fail (event != NULL, FALSE);
1056
1057   spin = GTK_SPIN_BUTTON (widget);
1058
1059   if (spin->button)
1060     return FALSE;
1061
1062   if (event->window == spin->panel)
1063     {
1064       gint y;
1065
1066       y = event->y;
1067       if (event->is_hint)
1068         gdk_window_get_pointer (spin->panel, NULL, &y, NULL);
1069
1070       if (y <= widget->requisition.height / 2 &&
1071           spin->in_child == GTK_ARROW_DOWN)
1072         {
1073           spin->in_child = GTK_ARROW_UP;
1074           gtk_spin_button_draw_arrow (spin, GTK_ARROW_UP);
1075           gtk_spin_button_draw_arrow (spin, GTK_ARROW_DOWN);
1076         }
1077       else if (y > widget->requisition.height / 2 &&
1078           spin->in_child == GTK_ARROW_UP)
1079         {
1080           spin->in_child = GTK_ARROW_DOWN;
1081           gtk_spin_button_draw_arrow (spin, GTK_ARROW_UP);
1082           gtk_spin_button_draw_arrow (spin, GTK_ARROW_DOWN);
1083         }
1084       return FALSE;
1085     }
1086
1087   return GTK_WIDGET_CLASS (parent_class)->motion_notify_event (widget, event);
1088 }
1089
1090 static gint
1091 gtk_spin_button_timer (GtkSpinButton *spin_button)
1092 {
1093   gboolean retval = FALSE;
1094
1095   GDK_THREADS_ENTER ();
1096
1097   if (spin_button->timer)
1098     {
1099       if (spin_button->click_child == GTK_ARROW_UP)
1100         gtk_spin_button_real_spin (spin_button, spin_button->timer_step);
1101       else
1102         gtk_spin_button_real_spin (spin_button, -spin_button->timer_step);
1103
1104       if (spin_button->need_timer)
1105         {
1106           spin_button->need_timer = FALSE;
1107           spin_button->timer = gtk_timeout_add
1108             (SPIN_BUTTON_TIMER_DELAY, (GtkFunction) gtk_spin_button_timer,
1109              (gpointer) spin_button);
1110         }
1111       else
1112         {
1113           if (spin_button->climb_rate > 0.0 && spin_button->timer_step
1114               < spin_button->adjustment->page_increment)
1115             {
1116               if (spin_button->timer_calls < MAX_TIMER_CALLS)
1117                 spin_button->timer_calls++;
1118               else
1119                 {
1120                   spin_button->timer_calls = 0;
1121                   spin_button->timer_step += spin_button->climb_rate;
1122                 }
1123             }
1124           retval = TRUE;
1125         }
1126     }
1127
1128   GDK_THREADS_LEAVE ();
1129
1130   return retval;
1131 }
1132
1133 static void
1134 gtk_spin_button_value_changed (GtkAdjustment *adjustment,
1135                                GtkSpinButton *spin_button)
1136 {
1137   gint return_val;
1138
1139   g_return_if_fail (adjustment != NULL);
1140   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
1141
1142   return_val = FALSE;
1143   gtk_signal_emit (GTK_OBJECT (spin_button), spinbutton_signals[OUTPUT],
1144                    &return_val);
1145   if (return_val == FALSE)
1146     gtk_spin_button_default_output (spin_button);
1147
1148   gtk_signal_emit (GTK_OBJECT (spin_button),
1149                    spinbutton_signals[VALUE_CHANGED]);
1150
1151   gtk_spin_button_draw_arrow (spin_button, GTK_ARROW_UP);
1152   gtk_spin_button_draw_arrow (spin_button, GTK_ARROW_DOWN);
1153
1154   g_object_notify (G_OBJECT (spin_button), "value");
1155 }
1156
1157 static gint
1158 gtk_spin_button_key_press (GtkWidget     *widget,
1159                            GdkEventKey   *event)
1160 {
1161   GtkSpinButton *spin;
1162   gint key;
1163   gboolean key_repeat = FALSE;
1164
1165   g_return_val_if_fail (widget != NULL, FALSE);
1166   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
1167   g_return_val_if_fail (event != NULL, FALSE);
1168
1169   spin = GTK_SPIN_BUTTON (widget);
1170   key = event->keyval;
1171
1172   key_repeat = (event->time == spin->ev_time);
1173
1174   if (GTK_ENTRY (widget)->editable &&
1175       (key == GDK_Up || key == GDK_Down ||
1176        key == GDK_Page_Up || key == GDK_Page_Down))
1177     gtk_spin_button_update (spin);
1178
1179   switch (key)
1180     {
1181     case GDK_Up:
1182
1183       if (GTK_WIDGET_HAS_FOCUS (widget))
1184         {
1185           gtk_signal_emit_stop_by_name (GTK_OBJECT (widget),
1186                                         "key_press_event");
1187           if (!key_repeat)
1188             spin->timer_step = spin->adjustment->step_increment;
1189
1190          gtk_spin_button_real_spin (spin, spin->timer_step);
1191
1192           if (key_repeat)
1193             {
1194               if (spin->climb_rate > 0.0 && spin->timer_step
1195                   < spin->adjustment->page_increment)
1196                 {
1197                   if (spin->timer_calls < MAX_TIMER_CALLS)
1198                     spin->timer_calls++;
1199                   else
1200                     {
1201                       spin->timer_calls = 0;
1202                       spin->timer_step += spin->climb_rate;
1203                     }
1204                 }
1205             }
1206           return TRUE;
1207         }
1208       return FALSE;
1209
1210     case GDK_Down:
1211
1212       if (GTK_WIDGET_HAS_FOCUS (widget))
1213         {
1214           gtk_signal_emit_stop_by_name (GTK_OBJECT (widget),
1215                                         "key_press_event");
1216           if (!key_repeat)
1217             spin->timer_step = spin->adjustment->step_increment;
1218
1219          gtk_spin_button_real_spin (spin, -spin->timer_step);
1220
1221           if (key_repeat)
1222             {
1223               if (spin->climb_rate > 0.0 && spin->timer_step
1224                   < spin->adjustment->page_increment)
1225                 {
1226                   if (spin->timer_calls < MAX_TIMER_CALLS)
1227                     spin->timer_calls++;
1228                   else
1229                     {
1230                       spin->timer_calls = 0;
1231                       spin->timer_step += spin->climb_rate;
1232                     }
1233                 }
1234             }
1235           return TRUE;
1236         }
1237       return FALSE;
1238
1239     case GDK_Page_Up:
1240
1241       if (event->state & GDK_CONTROL_MASK)
1242         {
1243           gdouble diff = spin->adjustment->upper - spin->adjustment->value;
1244           if (diff > EPSILON)
1245             gtk_spin_button_real_spin (spin, diff);
1246         }
1247       else
1248         gtk_spin_button_real_spin (spin, spin->adjustment->page_increment);
1249       return TRUE;
1250
1251     case GDK_Page_Down:
1252
1253       if (event->state & GDK_CONTROL_MASK)
1254         {
1255           gdouble diff = spin->adjustment->value - spin->adjustment->lower;
1256           if (diff > EPSILON)
1257             gtk_spin_button_real_spin (spin, -diff);
1258         }
1259       else
1260         gtk_spin_button_real_spin (spin, -spin->adjustment->page_increment);
1261       return TRUE;
1262
1263     default:
1264       break;
1265     }
1266
1267   return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
1268 }
1269
1270 static gint
1271 gtk_spin_button_key_release (GtkWidget   *widget,
1272                              GdkEventKey *event)
1273 {
1274   GtkSpinButton *spin;
1275
1276   g_return_val_if_fail (widget != NULL, FALSE);
1277   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (widget), FALSE);
1278
1279   spin = GTK_SPIN_BUTTON (widget);
1280
1281   spin->ev_time = event->time;
1282   return TRUE;
1283 }
1284
1285 static void
1286 gtk_spin_button_snap (GtkSpinButton *spin_button,
1287                       gdouble        val)
1288 {
1289   gdouble inc;
1290   gdouble tmp;
1291
1292   inc = spin_button->adjustment->step_increment;
1293   tmp = (val - spin_button->adjustment->lower) / inc;
1294   if (tmp - floor (tmp) < ceil (tmp) - tmp)
1295     val = spin_button->adjustment->lower + floor (tmp) * inc;
1296   else
1297     val = spin_button->adjustment->lower + ceil (tmp) * inc;
1298
1299   if (fabs (val - spin_button->adjustment->value) > EPSILON)
1300     gtk_adjustment_set_value (spin_button->adjustment, val);
1301   else
1302     {
1303       gint return_val = FALSE;
1304       gtk_signal_emit (GTK_OBJECT (spin_button), spinbutton_signals[OUTPUT],
1305                        &return_val);
1306       if (return_val == FALSE)
1307         gtk_spin_button_default_output (spin_button);
1308     }
1309 }
1310
1311 static void
1312 gtk_spin_button_activate (GtkEntry *entry)
1313 {
1314   if (entry->editable)
1315     gtk_spin_button_update (GTK_SPIN_BUTTON (entry));
1316 }
1317
1318 static void
1319 gtk_spin_button_insert_text (GtkEntry    *entry,
1320                              const gchar *new_text,
1321                              gint         new_text_length,
1322                              gint        *position)
1323 {
1324   GtkEditable *editable = GTK_EDITABLE (entry);
1325   GtkSpinButton *spin = GTK_SPIN_BUTTON (editable);
1326
1327   if (spin->numeric)
1328     {
1329       struct lconv *lc;
1330       gboolean sign;
1331       gint dotpos = -1;
1332       gint i;
1333       GdkWChar pos_sign;
1334       GdkWChar neg_sign;
1335       gint entry_length;
1336
1337       entry_length = entry->text_length;
1338
1339       lc = localeconv ();
1340
1341       if (*(lc->negative_sign))
1342         neg_sign = *(lc->negative_sign);
1343       else
1344         neg_sign = '-';
1345
1346       if (*(lc->positive_sign))
1347         pos_sign = *(lc->positive_sign);
1348       else
1349         pos_sign = '+';
1350
1351       for (sign=0, i=0; i<entry_length; i++)
1352         if ((entry->text[i] == neg_sign) ||
1353             (entry->text[i] == pos_sign))
1354           {
1355             sign = 1;
1356             break;
1357           }
1358
1359       if (sign && !(*position))
1360         return;
1361
1362       for (dotpos=-1, i=0; i<entry_length; i++)
1363         if (entry->text[i] == *(lc->decimal_point))
1364           {
1365             dotpos = i;
1366             break;
1367           }
1368
1369       if (dotpos > -1 && *position > dotpos &&
1370           (gint)spin->digits - entry_length
1371             + dotpos - new_text_length + 1 < 0)
1372         return;
1373
1374       for (i = 0; i < new_text_length; i++)
1375         {
1376           if (new_text[i] == neg_sign || new_text[i] == pos_sign)
1377             {
1378               if (sign || (*position) || i)
1379                 return;
1380               sign = TRUE;
1381             }
1382           else if (new_text[i] == *(lc->decimal_point))
1383             {
1384               if (!spin->digits || dotpos > -1 ||
1385                   (new_text_length - 1 - i + entry_length
1386                     - *position > (gint)spin->digits))
1387                 return;
1388               dotpos = *position + i;
1389             }
1390           else if (new_text[i] < 0x30 || new_text[i] > 0x39)
1391             return;
1392         }
1393     }
1394
1395   GTK_ENTRY_CLASS (parent_class)->insert_text (entry, new_text,
1396                                                new_text_length, position);
1397 }
1398
1399 static void
1400 gtk_spin_button_real_spin (GtkSpinButton *spin_button,
1401                            gdouble        increment)
1402 {
1403   GtkAdjustment *adj;
1404   gdouble new_value = 0.0;
1405
1406   g_return_if_fail (spin_button != NULL);
1407   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1408
1409   adj = spin_button->adjustment;
1410
1411   new_value = adj->value + increment;
1412
1413   if (increment > 0)
1414     {
1415       if (spin_button->wrap)
1416         {
1417           if (fabs (adj->value - adj->upper) < EPSILON)
1418             new_value = adj->lower;
1419           else if (new_value > adj->upper)
1420             new_value = adj->upper;
1421         }
1422       else
1423         new_value = MIN (new_value, adj->upper);
1424     }
1425   else if (increment < 0)
1426     {
1427       if (spin_button->wrap)
1428         {
1429           if (fabs (adj->value - adj->lower) < EPSILON)
1430             new_value = adj->upper;
1431           else if (new_value < adj->lower)
1432             new_value = adj->lower;
1433         }
1434       else
1435         new_value = MAX (new_value, adj->lower);
1436     }
1437
1438   if (fabs (new_value - adj->value) > EPSILON)
1439     gtk_adjustment_set_value (adj, new_value);
1440 }
1441
1442 static gint
1443 gtk_spin_button_default_input (GtkSpinButton *spin_button,
1444                                gdouble       *new_val)
1445 {
1446   gchar *err = NULL;
1447
1448   *new_val = strtod (gtk_entry_get_text (GTK_ENTRY (spin_button)), &err);
1449   if (*err)
1450     return GTK_INPUT_ERROR;
1451   else
1452     return FALSE;
1453 }
1454
1455 static gint
1456 gtk_spin_button_default_output (GtkSpinButton *spin_button)
1457 {
1458   gchar buf[MAX_TEXT_LENGTH];
1459
1460   sprintf (buf, "%0.*f", spin_button->digits, spin_button->adjustment->value);
1461   if (strcmp (buf, gtk_entry_get_text (GTK_ENTRY (spin_button))))
1462     gtk_entry_set_text (GTK_ENTRY (spin_button), buf);
1463   return FALSE;
1464 }
1465
1466
1467 /***********************************************************
1468  ***********************************************************
1469  ***                  Public interface                   ***
1470  ***********************************************************
1471  ***********************************************************/
1472
1473
1474 void
1475 gtk_spin_button_configure (GtkSpinButton  *spin_button,
1476                            GtkAdjustment  *adjustment,
1477                            gdouble         climb_rate,
1478                            guint           digits)
1479 {
1480   g_return_if_fail (spin_button != NULL);
1481   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1482   g_return_if_fail (digits < 6);
1483
1484   if (adjustment)
1485     gtk_spin_button_set_adjustment (spin_button, adjustment);
1486   else
1487     adjustment = spin_button->adjustment;
1488
1489   if (spin_button->digits != digits)
1490     {
1491       spin_button->digits = digits;
1492       g_object_notify (G_OBJECT (spin_button), "digits");
1493     }
1494
1495   if (spin_button->climb_rate != climb_rate)
1496     {
1497       spin_button->climb_rate = climb_rate;
1498       g_object_notify (G_OBJECT (spin_button), "climb_rate");
1499     }
1500
1501   gtk_adjustment_value_changed (adjustment);
1502 }
1503
1504 GtkWidget *
1505 gtk_spin_button_new (GtkAdjustment *adjustment,
1506                      gdouble        climb_rate,
1507                      guint          digits)
1508 {
1509   GtkSpinButton *spin;
1510
1511   if (adjustment)
1512     g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
1513   g_return_val_if_fail (digits < 6, NULL);
1514
1515   spin = gtk_type_new (GTK_TYPE_SPIN_BUTTON);
1516
1517   gtk_spin_button_configure (spin, adjustment, climb_rate, digits);
1518
1519   return GTK_WIDGET (spin);
1520 }
1521
1522 /**
1523  * gtk_spin_button_new_with_range:
1524  * @min: Minimum allowable value
1525  * @max: Maximum allowable value
1526  * @step: Increment added or subtracted by spinning the widget
1527  *
1528  * This is a convenience constructor that allows creation of a numeric
1529  * #GtkSpinButton without manually creating an adjustment. The value is
1530  * initially set to the minimum value and a page increment of 10 * @step
1531  * is the default. The precision of the spin button is equivalent to the
1532  * precision of @step.
1533  *
1534  * Return value: the newly instantiated spin button
1535  **/
1536 GtkWidget *
1537 gtk_spin_button_new_with_range (gdouble min,
1538                                 gdouble max,
1539                                 gdouble step)
1540 {
1541   GtkObject *adj;
1542   GtkSpinButton *spin;
1543   gint digits;
1544
1545   g_return_val_if_fail (min < max, NULL);
1546   g_return_val_if_fail (step != 0.0, NULL);
1547
1548   spin = gtk_type_new (GTK_TYPE_SPIN_BUTTON);
1549
1550   adj = gtk_adjustment_new (min, min, max, step, 10 * step, step);
1551
1552   if (fabs (step) >= 1.0)
1553     digits = 0;
1554   else {
1555     digits = abs ((gint) floor (log10 (fabs (step))));
1556     if (digits > 5)
1557       digits = 5;
1558   }
1559
1560   gtk_spin_button_configure (spin, GTK_ADJUSTMENT (adj), step, digits);
1561
1562   gtk_spin_button_set_numeric (spin, TRUE);
1563
1564   return GTK_WIDGET (spin);
1565 }
1566
1567 /* Callback used when the spin button's adjustment changes.  We need to redraw
1568  * the arrows when the adjustment's range changes, and reevaluate our size request.
1569  */
1570 static void
1571 adjustment_changed_cb (GtkAdjustment *adjustment, gpointer data)
1572 {
1573   GtkSpinButton *spin_button;
1574
1575   spin_button = GTK_SPIN_BUTTON (data);
1576
1577   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1578 }
1579
1580 /**
1581  * gtk_spin_button_set_adjustment:
1582  * @spin_button: a #GtkSpinButton
1583  * @adjustment: a #GtkAdjustment to replace the existing adjustment
1584  *
1585  * Replaces the #GtkAdjustment associated with @spin_button.
1586  **/
1587 void
1588 gtk_spin_button_set_adjustment (GtkSpinButton *spin_button,
1589                                 GtkAdjustment *adjustment)
1590 {
1591   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1592
1593   if (spin_button->adjustment != adjustment)
1594     {
1595       if (spin_button->adjustment)
1596         {
1597           gtk_signal_disconnect_by_data (GTK_OBJECT (spin_button->adjustment),
1598                                          (gpointer) spin_button);
1599           gtk_object_unref (GTK_OBJECT (spin_button->adjustment));
1600         }
1601       spin_button->adjustment = adjustment;
1602       if (adjustment)
1603         {
1604           gtk_object_ref (GTK_OBJECT (adjustment));
1605           gtk_object_sink (GTK_OBJECT (adjustment));
1606           gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
1607                               (GtkSignalFunc) gtk_spin_button_value_changed,
1608                               (gpointer) spin_button);
1609           gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
1610                               (GtkSignalFunc) adjustment_changed_cb,
1611                               (gpointer) spin_button);
1612         }
1613
1614       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1615     }
1616
1617   g_object_notify (G_OBJECT (spin_button), "adjustment");
1618 }
1619
1620 /**
1621  * gtk_spin_button_get_adjustment:
1622  * @spin_button:
1623  *
1624  * Get the adjustment associated with a #GtkSpinButton
1625  *
1626  * Return value: the #GtkAdjustment of @spin_button
1627  **/
1628 GtkAdjustment *
1629 gtk_spin_button_get_adjustment (GtkSpinButton *spin_button)
1630 {
1631   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), NULL);
1632
1633   return spin_button->adjustment;
1634 }
1635
1636 /**
1637  * gtk_spin_button_set_digits:
1638  * @spin_button: a #GtkSpinButton
1639  * @digits: the number of digits to be displayed for the spin button's value
1640  *
1641  * Set the precision to be displayed by @spin_button. Up to 5 digit precision
1642  * is allowed.
1643  **/
1644 void
1645 gtk_spin_button_set_digits (GtkSpinButton *spin_button,
1646                             guint          digits)
1647 {
1648   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1649   g_return_if_fail (digits < 6);
1650
1651   if (spin_button->digits != digits)
1652     {
1653       spin_button->digits = digits;
1654       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
1655       g_object_notify (G_OBJECT (spin_button), "digits");
1656
1657       /* since lower/upper may have changed */
1658       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1659     }
1660 }
1661
1662 /**
1663  * gtk_spin_button_set_increments:
1664  * @spin_button: a #GtkSpinButton
1665  * @step: increment applied for a button 1 press.
1666  * @page: increment applied for a button 2 press.
1667  *
1668  * Sets the step and page increments for spin_button.  This affects how
1669  * quickly the value changes when the spin button's arrows are activated.
1670  **/
1671 void
1672 gtk_spin_button_set_increments (GtkSpinButton *spin_button,
1673                                 gdouble        step,
1674                                 gdouble        page)
1675 {
1676   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1677
1678   spin_button->adjustment->step_increment = step;
1679   spin_button->adjustment->page_increment = page;
1680 }
1681
1682 /**
1683  * gtk_spin_button_set_range:
1684  * @spin_button: a #GtkSpinButton
1685  * @min: minimum allowable value
1686  * @max: maximum allowable value
1687  *
1688  * Sets the minimum and maximum allowable values for @spin_button
1689  **/
1690 void
1691 gtk_spin_button_set_range (GtkSpinButton *spin_button,
1692                            gdouble        min,
1693                            gdouble        max)
1694 {
1695   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1696
1697   spin_button->adjustment->lower = min;
1698   spin_button->adjustment->upper = max;
1699 }
1700
1701 /**
1702  * gtk_spin_button_get_value_as_float:
1703  * @spin_button: a #GtkSpinButton
1704  *
1705  * Get the value @spin_button represented as a floating point number.
1706  *
1707  * Return value: the value of @spin_button
1708  **/
1709 gdouble
1710 gtk_spin_button_get_value_as_float (GtkSpinButton *spin_button)
1711 {
1712   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0.0);
1713
1714   return spin_button->adjustment->value;
1715 }
1716
1717 /**
1718  * gtk_spin_button_get_value_as_int:
1719  * @spin_button: a #GtkSpinButton
1720  *
1721  * Get the value @spin_button represented as an integer.
1722  *
1723  * Return value: the value of @spin_button
1724  **/
1725 gint
1726 gtk_spin_button_get_value_as_int (GtkSpinButton *spin_button)
1727 {
1728   gdouble val;
1729
1730   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1731
1732   val = spin_button->adjustment->value;
1733   if (val - floor (val) < ceil (val) - val)
1734     return floor (val);
1735   else
1736     return ceil (val);
1737 }
1738
1739 /**
1740  * gtk_spin_button_set_value:
1741  * @spin_button: a #GtkSpinButton
1742  * @value: the new value
1743  *
1744  * Set the value of @spin_button.
1745  **/
1746 void
1747 gtk_spin_button_set_value (GtkSpinButton *spin_button,
1748                            gdouble        value)
1749 {
1750   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1751
1752   if (fabs (value - spin_button->adjustment->value) > EPSILON)
1753     gtk_adjustment_set_value (spin_button->adjustment, value);
1754   else
1755     {
1756       gint return_val = FALSE;
1757       gtk_signal_emit (GTK_OBJECT (spin_button), spinbutton_signals[OUTPUT],
1758                        &return_val);
1759       if (return_val == FALSE)
1760         gtk_spin_button_default_output (spin_button);
1761     }
1762 }
1763
1764 /**
1765  * gtk_spin_button_set_update_policy:
1766  * @spin_button: a #GtkSpinButton
1767  * @policy: a #GtkSpinButtonUpdatePolicy value
1768  *
1769  * Sets the update behavior of a spin button. This determines whether the
1770  * spin button is always updated or only when a valid value is set.
1771  **/
1772 void
1773 gtk_spin_button_set_update_policy (GtkSpinButton             *spin_button,
1774                                    GtkSpinButtonUpdatePolicy  policy)
1775 {
1776   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1777
1778   if (spin_button->update_policy != policy)
1779     {
1780       spin_button->update_policy = policy;
1781       g_object_notify (G_OBJECT (spin_button), "update_policy");
1782     }
1783 }
1784
1785 /**
1786  * gtk_spin_button_set_numeric:
1787  * @spin_button: a #GtkSpinButton
1788  * @numeric: flag indicating if only numeric entry is allowed.
1789  *
1790  * Sets the flag that determines if non-numeric text can be typed into
1791  * the spin button.
1792  **/
1793 void
1794 gtk_spin_button_set_numeric (GtkSpinButton  *spin_button,
1795                              gboolean        numeric)
1796 {
1797   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1798
1799   spin_button->numeric = (numeric != 0);
1800
1801   g_object_notify (G_OBJECT (spin_button), "numeric");
1802 }
1803
1804 /**
1805  * gtk_spin_button_set_wrap:
1806  * @spin_button: a #GtkSpinButton
1807  * @wrap: a flag indicating if wrapping behavior is performed.
1808  *
1809  * Sets the flag that determines if a spin button value wraps around to the
1810  * opposite limit when the upper or lower limit of the range is exceeded.
1811  **/
1812 void
1813 gtk_spin_button_set_wrap (GtkSpinButton  *spin_button,
1814                           gboolean        wrap)
1815 {
1816   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1817
1818   spin_button->wrap = (wrap != 0);
1819
1820   g_object_notify (G_OBJECT (spin_button), "wrap");
1821 }
1822
1823 /**
1824  * spin_button_get_shadow_type:
1825  * @spin_button: a #GtkSpinButton
1826  *
1827  * Convenience function to Get the shadow type from the underlying widget's
1828  * style.
1829  *
1830  * Return value: the #GtkShadowType
1831  **/
1832 static gint
1833 spin_button_get_shadow_type (GtkSpinButton *spin_button)
1834 {
1835   GtkShadowType rc_shadow_type;
1836
1837   gtk_widget_style_get (GTK_WIDGET (spin_button), "shadow_type", &rc_shadow_type, NULL);
1838
1839   return rc_shadow_type;
1840 }
1841
1842 /**
1843  * gtk_spin_button_set_snap_to_ticks:
1844  * @spin_button: a #GtkSpinButton
1845  * @snap_to_ticks: a flag indicating if invalid values should be corrected.
1846  *
1847  * Sets the policy as to whether values are corrected to the nearest step
1848  * increment when a spin button is activated after providing an invalid value.
1849  **/
1850 void
1851 gtk_spin_button_set_snap_to_ticks (GtkSpinButton *spin_button,
1852                                    gboolean       snap_to_ticks)
1853 {
1854   guint new_val;
1855
1856   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1857
1858   new_val = (snap_to_ticks != 0);
1859
1860   if (new_val != spin_button->snap_to_ticks)
1861     {
1862       spin_button->snap_to_ticks = new_val;
1863       if (new_val && GTK_ENTRY (spin_button)->editable)
1864         gtk_spin_button_update (spin_button);
1865
1866       g_object_notify (G_OBJECT (spin_button), "snap_to_ticks");
1867     }
1868 }
1869
1870 /**
1871  * gtk_spin_button_spin:
1872  * @spin_button: a #GtkSpinButton
1873  * @direction: a #GtkSpinType indicating the direction to spin.
1874  * @increment: step increment to apply in the specified direction.
1875  *
1876  * Increment or decrement a spin button's value in a specified direction
1877  * by a specified amount.
1878  **/
1879 void
1880 gtk_spin_button_spin (GtkSpinButton *spin_button,
1881                       GtkSpinType    direction,
1882                       gdouble        increment)
1883 {
1884   GtkAdjustment *adj;
1885   gdouble diff;
1886
1887   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1888
1889   adj = spin_button->adjustment;
1890
1891   /* for compatibility with the 1.0.x version of this function */
1892   if (increment != 0 && increment != adj->step_increment &&
1893       (direction == GTK_SPIN_STEP_FORWARD ||
1894        direction == GTK_SPIN_STEP_BACKWARD))
1895     {
1896       if (direction == GTK_SPIN_STEP_BACKWARD && increment > 0)
1897         increment = -increment;
1898       direction = GTK_SPIN_USER_DEFINED;
1899     }
1900
1901   switch (direction)
1902     {
1903     case GTK_SPIN_STEP_FORWARD:
1904
1905       gtk_spin_button_real_spin (spin_button, adj->step_increment);
1906       break;
1907
1908     case GTK_SPIN_STEP_BACKWARD:
1909
1910       gtk_spin_button_real_spin (spin_button, -adj->step_increment);
1911       break;
1912
1913     case GTK_SPIN_PAGE_FORWARD:
1914
1915       gtk_spin_button_real_spin (spin_button, adj->page_increment);
1916       break;
1917
1918     case GTK_SPIN_PAGE_BACKWARD:
1919
1920       gtk_spin_button_real_spin (spin_button, -adj->page_increment);
1921       break;
1922
1923     case GTK_SPIN_HOME:
1924
1925       diff = adj->value - adj->lower;
1926       if (diff > EPSILON)
1927         gtk_spin_button_real_spin (spin_button, -diff);
1928       break;
1929
1930     case GTK_SPIN_END:
1931
1932       diff = adj->upper - adj->value;
1933       if (diff > EPSILON)
1934         gtk_spin_button_real_spin (spin_button, diff);
1935       break;
1936
1937     case GTK_SPIN_USER_DEFINED:
1938
1939       if (increment != 0)
1940         gtk_spin_button_real_spin (spin_button, increment);
1941       break;
1942
1943     default:
1944       break;
1945     }
1946 }
1947
1948 /**
1949  * gtk_spin_button_update:
1950  * @spin_button: a #GtkSpinButton
1951  *
1952  * Manually force an update of the spin button.
1953  **/
1954 void
1955 gtk_spin_button_update (GtkSpinButton *spin_button)
1956 {
1957   gdouble val;
1958   gint error = 0;
1959   gint return_val;
1960
1961   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1962
1963   return_val = FALSE;
1964   gtk_signal_emit (GTK_OBJECT (spin_button), spinbutton_signals[INPUT],
1965                    &val, &return_val);
1966   if (return_val == FALSE)
1967     {
1968       return_val = gtk_spin_button_default_input (spin_button, &val);
1969       error = (return_val == GTK_INPUT_ERROR);
1970     }
1971   else if (return_val == GTK_INPUT_ERROR)
1972     error = 1;
1973
1974   if (spin_button->update_policy == GTK_UPDATE_ALWAYS)
1975     {
1976       if (val < spin_button->adjustment->lower)
1977         val = spin_button->adjustment->lower;
1978       else if (val > spin_button->adjustment->upper)
1979         val = spin_button->adjustment->upper;
1980     }
1981   else if ((spin_button->update_policy == GTK_UPDATE_IF_VALID) &&
1982            (error ||
1983            val < spin_button->adjustment->lower ||
1984            val > spin_button->adjustment->upper))
1985     {
1986       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
1987       return;
1988     }
1989
1990   if (spin_button->snap_to_ticks)
1991     gtk_spin_button_snap (spin_button, val);
1992   else
1993     {
1994       if (fabs (val - spin_button->adjustment->value) > EPSILON)
1995         gtk_adjustment_set_value (spin_button->adjustment, val);
1996       else
1997         {
1998           return_val = FALSE;
1999           gtk_signal_emit (GTK_OBJECT (spin_button), spinbutton_signals[OUTPUT],
2000                            &return_val);
2001           if (return_val == FALSE)
2002             gtk_spin_button_default_output (spin_button);
2003         }
2004     }
2005 }
2006