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   if (GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->enter_notify_event)
 920     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->enter_notify_event (widget, event);
 921
 922   return FALSE;
 923 }
 924
 925 static gint
 926 gtk_spin_button_leave_notify (GtkWidget        *widget,
 927                               GdkEventCrossing *event)
 928 {
 929   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 930
 931   spin->in_child = NO_ARROW;
 932   gtk_widget_queue_draw (GTK_WIDGET (spin));
 933
 934   if (GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->leave_notify_event)
 935     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->leave_notify_event (widget, event);
 936
 937   return FALSE;
 938 }
 939
 940 static gint
 941 gtk_spin_button_focus_out (GtkWidget     *widget,
 942                            GdkEventFocus *event)
 943 {
 944   if (GTK_ENTRY (widget)->editable)
 945     gtk_spin_button_update (GTK_SPIN_BUTTON (widget));
 946
 947   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->focus_out_event (widget, event);
 948 }
 949
 950 static void
 951 gtk_spin_button_grab_notify (GtkWidget *widget,
 952                              gboolean   was_grabbed)
 953 {
 954   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 955
 956   if (!was_grabbed)
 957     {
 958       gtk_spin_button_stop_spinning (spin);
 959       gtk_widget_queue_draw (GTK_WIDGET (spin));
 960     }
 961 }
 962
 963 static void
 964 gtk_spin_button_state_changed (GtkWidget    *widget,
 965                                GtkStateType  previous_state)
 966 {
 967   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 968
 969   if (!GTK_WIDGET_IS_SENSITIVE (widget))
 970     {
 971       gtk_spin_button_stop_spinning (spin);
 972       gtk_widget_queue_draw (GTK_WIDGET (spin));
 973     }
 974 }
 975
 976 static void
 977 gtk_spin_button_style_set (GtkWidget *widget,
 978                            GtkStyle  *previous_style)
 979 {
 980   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 981
 982   if (previous_style && GTK_WIDGET_REALIZED (widget))
 983     gtk_style_set_background (widget->style, spin->panel, GTK_STATE_NORMAL);
 984
 985   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->style_set (widget, previous_style);
 986 }
 987
 988
 989 static gint
 990 gtk_spin_button_scroll (GtkWidget      *widget,
 991                         GdkEventScroll *event)
 992 {
 993   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 994
 995   if (event->direction == GDK_SCROLL_UP)
 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 if (event->direction == GDK_SCROLL_DOWN)
1002     {
1003       if (!GTK_WIDGET_HAS_FOCUS (widget))
1004         gtk_widget_grab_focus (widget);
1005       gtk_spin_button_real_spin (spin, -spin->adjustment->step_increment);
1006     }
1007   else
1008     return FALSE;
1009
1010   return TRUE;
1011 }
1012
1013 static void
1014 gtk_spin_button_stop_spinning (GtkSpinButton *spin)
1015 {
1016   if (spin->timer)
1017     {
1018       g_source_remove (spin->timer);
1019       spin->timer = 0;
1020       spin->timer_calls = 0;
1021       spin->need_timer = FALSE;
1022     }
1023
1024   spin->button = 0;
1025   spin->timer = 0;
1026   spin->timer_step = spin->adjustment->step_increment;
1027   spin->timer_calls = 0;
1028
1029   spin->click_child = NO_ARROW;
1030   spin->button = 0;
1031 }
1032
1033 static void
1034 start_spinning (GtkSpinButton *spin,
1035                 GtkArrowType   click_child,
1036                 gdouble        step)
1037 {
1038   g_return_if_fail (click_child == GTK_ARROW_UP || click_child == GTK_ARROW_DOWN);
1039
1040   spin->click_child = click_child;
1041
1042   if (!spin->timer)
1043     {
1044       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (spin));
1045       guint        timeout;
1046
1047       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1048
1049       spin->timer_step = step;
1050       spin->need_timer = TRUE;
1051       spin->timer = gdk_threads_add_timeout (timeout,
1052                                    (GSourceFunc) gtk_spin_button_timer,
1053                                    (gpointer) spin);
1054     }
1055   gtk_spin_button_real_spin (spin, click_child == GTK_ARROW_UP ? step : -step);
1056
1057   gtk_widget_queue_draw (GTK_WIDGET (spin));
1058 }
1059
1060 static gint
1061 gtk_spin_button_button_press (GtkWidget      *widget,
1062                               GdkEventButton *event)
1063 {
1064   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1065
1066   if (!spin->button)
1067     {
1068       if (event->window == spin->panel)
1069         {
1070           if (!GTK_WIDGET_HAS_FOCUS (widget))
1071             gtk_widget_grab_focus (widget);
1072           spin->button = event->button;
1073
1074           if (GTK_ENTRY (widget)->editable)
1075             gtk_spin_button_update (spin);
1076
1077           if (event->y <= widget->requisition.height / 2)
1078             {
1079               if (event->button == 1)
1080                 start_spinning (spin, GTK_ARROW_UP, spin->adjustment->step_increment);
1081               else if (event->button == 2)
1082                 start_spinning (spin, GTK_ARROW_UP, spin->adjustment->page_increment);
1083               else
1084                 spin->click_child = GTK_ARROW_UP;
1085             }
1086           else
1087             {
1088               if (event->button == 1)
1089                 start_spinning (spin, GTK_ARROW_DOWN, spin->adjustment->step_increment);
1090               else if (event->button == 2)
1091                 start_spinning (spin, GTK_ARROW_DOWN, spin->adjustment->page_increment);
1092               else
1093                 spin->click_child = GTK_ARROW_DOWN;
1094             }
1095           return TRUE;
1096         }
1097       else
1098         return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->button_press_event (widget, event);
1099     }
1100   return FALSE;
1101 }
1102
1103 static gint
1104 gtk_spin_button_button_release (GtkWidget      *widget,
1105                                 GdkEventButton *event)
1106 {
1107   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1108   gint arrow_size;
1109
1110   arrow_size = spin_button_get_arrow_size (spin);
1111
1112   if (event->button == spin->button)
1113     {
1114       int click_child = spin->click_child;
1115
1116       gtk_spin_button_stop_spinning (spin);
1117
1118       if (event->button == 3)
1119         {
1120           if (event->y >= 0 && event->x >= 0 &&
1121               event->y <= widget->requisition.height &&
1122               event->x <= arrow_size + 2 * widget->style->xthickness)
1123             {
1124               if (click_child == GTK_ARROW_UP &&
1125                   event->y <= widget->requisition.height / 2)
1126                 {
1127                   gdouble diff;
1128
1129                   diff = spin->adjustment->upper - spin->adjustment->value;
1130                   if (diff > EPSILON)
1131                     gtk_spin_button_real_spin (spin, diff);
1132                 }
1133               else if (click_child == GTK_ARROW_DOWN &&
1134                        event->y > widget->requisition.height / 2)
1135                 {
1136                   gdouble diff;
1137
1138                   diff = spin->adjustment->value - spin->adjustment->lower;
1139                   if (diff > EPSILON)
1140                     gtk_spin_button_real_spin (spin, -diff);
1141                 }
1142             }
1143         }
1144       gtk_widget_queue_draw (GTK_WIDGET (spin));
1145
1146       return TRUE;
1147     }
1148   else
1149     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->button_release_event (widget, event);
1150 }
1151
1152 static gint
1153 gtk_spin_button_motion_notify (GtkWidget      *widget,
1154                                GdkEventMotion *event)
1155 {
1156   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1157
1158   if (spin->button)
1159     return FALSE;
1160
1161   if (event->window == spin->panel)
1162     {
1163       gint y = event->y;
1164
1165       gdk_event_request_motions (event);
1166
1167       if (y <= widget->requisition.height / 2 &&
1168           spin->in_child == GTK_ARROW_DOWN)
1169         {
1170           spin->in_child = GTK_ARROW_UP;
1171           gtk_widget_queue_draw (GTK_WIDGET (spin));
1172         }
1173       else if (y > widget->requisition.height / 2 &&
1174           spin->in_child == GTK_ARROW_UP)
1175         {
1176           spin->in_child = GTK_ARROW_DOWN;
1177           gtk_widget_queue_draw (GTK_WIDGET (spin));
1178         }
1179
1180       return FALSE;
1181     }
1182
1183   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->motion_notify_event (widget, event);
1184 }
1185
1186 static gint
1187 gtk_spin_button_timer (GtkSpinButton *spin_button)
1188 {
1189   gboolean retval = FALSE;
1190
1191   if (spin_button->timer)
1192     {
1193       if (spin_button->click_child == GTK_ARROW_UP)
1194         gtk_spin_button_real_spin (spin_button, spin_button->timer_step);
1195       else
1196         gtk_spin_button_real_spin (spin_button, -spin_button->timer_step);
1197
1198       if (spin_button->need_timer)
1199         {
1200           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (spin_button));
1201           guint        timeout;
1202
1203           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
1204
1205           spin_button->need_timer = FALSE;
1206           spin_button->timer = gdk_threads_add_timeout (timeout,
1207                                               (GSourceFunc) gtk_spin_button_timer,
1208                                               (gpointer) spin_button);
1209         }
1210       else
1211         {
1212           if (spin_button->climb_rate > 0.0 && spin_button->timer_step
1213               < spin_button->adjustment->page_increment)
1214             {
1215               if (spin_button->timer_calls < MAX_TIMER_CALLS)
1216                 spin_button->timer_calls++;
1217               else
1218                 {
1219                   spin_button->timer_calls = 0;
1220                   spin_button->timer_step += spin_button->climb_rate;
1221                 }
1222             }
1223           retval = TRUE;
1224         }
1225     }
1226
1227   return retval;
1228 }
1229
1230 static void
1231 gtk_spin_button_value_changed (GtkAdjustment *adjustment,
1232                                GtkSpinButton *spin_button)
1233 {
1234   gboolean return_val;
1235
1236   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
1237
1238   return_val = FALSE;
1239   g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1240   if (return_val == FALSE)
1241     gtk_spin_button_default_output (spin_button);
1242
1243   g_signal_emit (spin_button, spinbutton_signals[VALUE_CHANGED], 0);
1244
1245   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1246
1247   g_object_notify (G_OBJECT (spin_button), "value");
1248 }
1249
1250 static void
1251 gtk_spin_button_real_change_value (GtkSpinButton *spin,
1252                                    GtkScrollType  scroll)
1253 {
1254   gdouble old_value;
1255
1256   /* When the key binding is activated, there may be an outstanding
1257    * value, so we first have to commit what is currently written in
1258    * the spin buttons text entry. See #106574
1259    */
1260   gtk_spin_button_update (spin);
1261
1262   old_value = spin->adjustment->value;
1263
1264   /* We don't test whether the entry is editable, since
1265    * this key binding conceptually corresponds to changing
1266    * the value with the buttons using the mouse, which
1267    * we allow for non-editable spin buttons.
1268    */
1269   switch (scroll)
1270     {
1271     case GTK_SCROLL_STEP_BACKWARD:
1272     case GTK_SCROLL_STEP_DOWN:
1273     case GTK_SCROLL_STEP_LEFT:
1274       gtk_spin_button_real_spin (spin, -spin->timer_step);
1275
1276       if (spin->climb_rate > 0.0 && spin->timer_step
1277           < spin->adjustment->page_increment)
1278         {
1279           if (spin->timer_calls < MAX_TIMER_CALLS)
1280             spin->timer_calls++;
1281           else
1282             {
1283               spin->timer_calls = 0;
1284               spin->timer_step += spin->climb_rate;
1285             }
1286         }
1287       break;
1288
1289     case GTK_SCROLL_STEP_FORWARD:
1290     case GTK_SCROLL_STEP_UP:
1291     case GTK_SCROLL_STEP_RIGHT:
1292       gtk_spin_button_real_spin (spin, spin->timer_step);
1293
1294       if (spin->climb_rate > 0.0 && spin->timer_step
1295           < spin->adjustment->page_increment)
1296         {
1297           if (spin->timer_calls < MAX_TIMER_CALLS)
1298             spin->timer_calls++;
1299           else
1300             {
1301               spin->timer_calls = 0;
1302               spin->timer_step += spin->climb_rate;
1303             }
1304         }
1305       break;
1306
1307     case GTK_SCROLL_PAGE_BACKWARD:
1308     case GTK_SCROLL_PAGE_DOWN:
1309     case GTK_SCROLL_PAGE_LEFT:
1310       gtk_spin_button_real_spin (spin, -spin->adjustment->page_increment);
1311       break;
1312
1313     case GTK_SCROLL_PAGE_FORWARD:
1314     case GTK_SCROLL_PAGE_UP:
1315     case GTK_SCROLL_PAGE_RIGHT:
1316       gtk_spin_button_real_spin (spin, spin->adjustment->page_increment);
1317       break;
1318
1319     case GTK_SCROLL_START:
1320       {
1321         gdouble diff = spin->adjustment->value - spin->adjustment->lower;
1322         if (diff > EPSILON)
1323           gtk_spin_button_real_spin (spin, -diff);
1324         break;
1325       }
1326
1327     case GTK_SCROLL_END:
1328       {
1329         gdouble diff = spin->adjustment->upper - spin->adjustment->value;
1330         if (diff > EPSILON)
1331           gtk_spin_button_real_spin (spin, diff);
1332         break;
1333       }
1334
1335     default:
1336       g_warning ("Invalid scroll type %d for GtkSpinButton::change-value", scroll);
1337       break;
1338     }
1339
1340   gtk_spin_button_update (spin);
1341
1342   if (spin->adjustment->value == old_value)
1343     gtk_widget_error_bell (GTK_WIDGET (spin));
1344 }
1345
1346 static gint
1347 gtk_spin_button_key_release (GtkWidget   *widget,
1348                              GdkEventKey *event)
1349 {
1350   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1351
1352   /* We only get a release at the end of a key repeat run, so reset the timer_step */
1353   spin->timer_step = spin->adjustment->step_increment;
1354   spin->timer_calls = 0;
1355
1356   return TRUE;
1357 }
1358
1359 static void
1360 gtk_spin_button_snap (GtkSpinButton *spin_button,
1361                       gdouble        val)
1362 {
1363   gdouble inc;
1364   gdouble tmp;
1365
1366   inc = spin_button->adjustment->step_increment;
1367   if (inc == 0)
1368     return;
1369
1370   tmp = (val - spin_button->adjustment->lower) / inc;
1371   if (tmp - floor (tmp) < ceil (tmp) - tmp)
1372     val = spin_button->adjustment->lower + floor (tmp) * inc;
1373   else
1374     val = spin_button->adjustment->lower + ceil (tmp) * inc;
1375
1376   gtk_spin_button_set_value (spin_button, val);
1377 }
1378
1379 static void
1380 gtk_spin_button_activate (GtkEntry *entry)
1381 {
1382   if (entry->editable)
1383     gtk_spin_button_update (GTK_SPIN_BUTTON (entry));
1384
1385   /* Chain up so that entry->activates_default is honored */
1386   GTK_ENTRY_CLASS (gtk_spin_button_parent_class)->activate (entry);
1387 }
1388
1389 static void
1390 gtk_spin_button_get_text_area_size (GtkEntry *entry,
1391                                     gint     *x,
1392                                     gint     *y,
1393                                     gint     *width,
1394                                     gint     *height)
1395 {
1396   gint arrow_size;
1397   gint panel_width;
1398
1399   GTK_ENTRY_CLASS (gtk_spin_button_parent_class)->get_text_area_size (entry, x, y, width, height);
1400
1401   arrow_size = spin_button_get_arrow_size (GTK_SPIN_BUTTON (entry));
1402   panel_width = arrow_size + 2 * GTK_WIDGET (entry)->style->xthickness;
1403
1404   if (width)
1405     *width -= panel_width;
1406
1407   if (gtk_widget_get_direction (GTK_WIDGET (entry)) == GTK_TEXT_DIR_RTL && x)
1408     *x += panel_width;
1409 }
1410
1411 static void
1412 gtk_spin_button_insert_text (GtkEditable *editable,
1413                              const gchar *new_text,
1414                              gint         new_text_length,
1415                              gint        *position)
1416 {
1417   GtkEntry *entry = GTK_ENTRY (editable);
1418   GtkSpinButton *spin = GTK_SPIN_BUTTON (editable);
1419   GtkEditableClass *parent_editable_iface = g_type_interface_peek (gtk_spin_button_parent_class, GTK_TYPE_EDITABLE);
1420
1421   if (spin->numeric)
1422     {
1423       struct lconv *lc;
1424       gboolean sign;
1425       gint dotpos = -1;
1426       gint i;
1427       GdkWChar pos_sign;
1428       GdkWChar neg_sign;
1429       gint entry_length;
1430
1431       entry_length = entry->text_length;
1432
1433       lc = localeconv ();
1434
1435       if (*(lc->negative_sign))
1436         neg_sign = *(lc->negative_sign);
1437       else
1438         neg_sign = '-';
1439
1440       if (*(lc->positive_sign))
1441         pos_sign = *(lc->positive_sign);
1442       else
1443         pos_sign = '+';
1444
1445 #ifdef G_OS_WIN32
1446       /* Workaround for bug caused by some Windows application messing
1447        * up the positive sign of the current locale, more specifically
1448        * HKEY_CURRENT_USER\Control Panel\International\sPositiveSign.
1449        * See bug #330743 and for instance
1450        * http://www.msnewsgroups.net/group/microsoft.public.dotnet.languages.csharp/topic36024.aspx
1451        *
1452        * I don't know if the positive sign always gets bogusly set to
1453        * a digit when the above Registry value is corrupted as
1454        * described. (In my test case, it got set to "8", and in the
1455        * bug report above it presumably was set ot "0".) Probably it
1456        * might get set to almost anything? So how to distinguish a
1457        * bogus value from some correct one for some locale? That is
1458        * probably hard, but at least we should filter out the
1459        * digits...
1460        */
1461       if (pos_sign >= '0' && pos_sign <= '9')
1462         pos_sign = '+';
1463 #endif
1464
1465       for (sign=0, i=0; i<entry_length; i++)
1466         if ((entry->text[i] == neg_sign) ||
1467             (entry->text[i] == pos_sign))
1468           {
1469             sign = 1;
1470             break;
1471           }
1472
1473       if (sign && !(*position))
1474         return;
1475
1476       for (dotpos=-1, i=0; i<entry_length; i++)
1477         if (entry->text[i] == *(lc->decimal_point))
1478           {
1479             dotpos = i;
1480             break;
1481           }
1482
1483       if (dotpos > -1 && *position > dotpos &&
1484           (gint)spin->digits - entry_length
1485             + dotpos - new_text_length + 1 < 0)
1486         return;
1487
1488       for (i = 0; i < new_text_length; i++)
1489         {
1490           if (new_text[i] == neg_sign || new_text[i] == pos_sign)
1491             {
1492               if (sign || (*position) || i)
1493                 return;
1494               sign = TRUE;
1495             }
1496           else if (new_text[i] == *(lc->decimal_point))
1497             {
1498               if (!spin->digits || dotpos > -1 ||
1499                   (new_text_length - 1 - i + entry_length
1500                     - *position > (gint)spin->digits))
1501                 return;
1502               dotpos = *position + i;
1503             }
1504           else if (new_text[i] < 0x30 || new_text[i] > 0x39)
1505             return;
1506         }
1507     }
1508
1509   parent_editable_iface->insert_text (editable, new_text,
1510                                       new_text_length, position);
1511 }
1512
1513 static void
1514 gtk_spin_button_real_spin (GtkSpinButton *spin_button,
1515                            gdouble        increment)
1516 {
1517   GtkAdjustment *adj;
1518   gdouble new_value = 0.0;
1519   gboolean wrapped = FALSE;
1520
1521   adj = spin_button->adjustment;
1522
1523   new_value = adj->value + increment;
1524
1525   if (increment > 0)
1526     {
1527       if (spin_button->wrap)
1528         {
1529           if (fabs (adj->value - adj->upper) < EPSILON)
1530             {
1531               new_value = adj->lower;
1532               wrapped = TRUE;
1533             }
1534           else if (new_value > adj->upper)
1535             new_value = adj->upper;
1536         }
1537       else
1538         new_value = MIN (new_value, adj->upper);
1539     }
1540   else if (increment < 0)
1541     {
1542       if (spin_button->wrap)
1543         {
1544           if (fabs (adj->value - adj->lower) < EPSILON)
1545             {
1546               new_value = adj->upper;
1547               wrapped = TRUE;
1548             }
1549           else if (new_value < adj->lower)
1550             new_value = adj->lower;
1551         }
1552       else
1553         new_value = MAX (new_value, adj->lower);
1554     }
1555
1556   if (fabs (new_value - adj->value) > EPSILON)
1557     gtk_adjustment_set_value (adj, new_value);
1558
1559   if (wrapped)
1560     g_signal_emit (spin_button, spinbutton_signals[WRAPPED], 0);
1561
1562   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1563 }
1564
1565 static gint
1566 gtk_spin_button_default_input (GtkSpinButton *spin_button,
1567                                gdouble       *new_val)
1568 {
1569   gchar *err = NULL;
1570
1571   *new_val = g_strtod (gtk_entry_get_text (GTK_ENTRY (spin_button)), &err);
1572   if (*err)
1573     return GTK_INPUT_ERROR;
1574   else
1575     return FALSE;
1576 }
1577
1578 static gint
1579 gtk_spin_button_default_output (GtkSpinButton *spin_button)
1580 {
1581   gchar *buf = g_strdup_printf ("%0.*f", spin_button->digits, spin_button->adjustment->value);
1582
1583   if (strcmp (buf, gtk_entry_get_text (GTK_ENTRY (spin_button))))
1584     gtk_entry_set_text (GTK_ENTRY (spin_button), buf);
1585   g_free (buf);
1586   return FALSE;
1587 }
1588
1589
1590 /***********************************************************
1591  ***********************************************************
1592  ***                  Public interface                   ***
1593  ***********************************************************
1594  ***********************************************************/
1595
1596
1597 void
1598 gtk_spin_button_configure (GtkSpinButton  *spin_button,
1599                            GtkAdjustment  *adjustment,
1600                            gdouble         climb_rate,
1601                            guint           digits)
1602 {
1603   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1604
1605   if (adjustment)
1606     gtk_spin_button_set_adjustment (spin_button, adjustment);
1607   else
1608     adjustment = spin_button->adjustment;
1609
1610   g_object_freeze_notify (G_OBJECT (spin_button));
1611   if (spin_button->digits != digits)
1612     {
1613       spin_button->digits = digits;
1614       g_object_notify (G_OBJECT (spin_button), "digits");
1615     }
1616
1617   if (spin_button->climb_rate != climb_rate)
1618     {
1619       spin_button->climb_rate = climb_rate;
1620       g_object_notify (G_OBJECT (spin_button), "climb-rate");
1621     }
1622   g_object_thaw_notify (G_OBJECT (spin_button));
1623
1624   gtk_adjustment_value_changed (adjustment);
1625 }
1626
1627 GtkWidget *
1628 gtk_spin_button_new (GtkAdjustment *adjustment,
1629                      gdouble        climb_rate,
1630                      guint          digits)
1631 {
1632   GtkSpinButton *spin;
1633
1634   if (adjustment)
1635     g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
1636
1637   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1638
1639   gtk_spin_button_configure (spin, adjustment, climb_rate, digits);
1640
1641   return GTK_WIDGET (spin);
1642 }
1643
1644 /**
1645  * gtk_spin_button_new_with_range:
1646  * @min: Minimum allowable value
1647  * @max: Maximum allowable value
1648  * @step: Increment added or subtracted by spinning the widget
1649  *
1650  * This is a convenience constructor that allows creation of a numeric
1651  * #GtkSpinButton without manually creating an adjustment. The value is
1652  * initially set to the minimum value and a page increment of 10 * @step
1653  * is the default. The precision of the spin button is equivalent to the
1654  * precision of @step.
1655  *
1656  * Note that the way in which the precision is derived works best if @step
1657  * is a power of ten. If the resulting precision is not suitable for your
1658  * needs, use gtk_spin_button_set_digits() to correct it.
1659  *
1660  * Return value: The new spin button as a #GtkWidget.
1661  **/
1662 GtkWidget *
1663 gtk_spin_button_new_with_range (gdouble min,
1664                                 gdouble max,
1665                                 gdouble step)
1666 {
1667   GtkObject *adj;
1668   GtkSpinButton *spin;
1669   gint digits;
1670
1671   g_return_val_if_fail (min <= max, NULL);
1672   g_return_val_if_fail (step != 0.0, NULL);
1673
1674   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1675
1676   adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
1677
1678   if (fabs (step) >= 1.0 || step == 0.0)
1679     digits = 0;
1680   else {
1681     digits = abs ((gint) floor (log10 (fabs (step))));
1682     if (digits > MAX_DIGITS)
1683       digits = MAX_DIGITS;
1684   }
1685
1686   gtk_spin_button_configure (spin, GTK_ADJUSTMENT (adj), step, digits);
1687
1688   gtk_spin_button_set_numeric (spin, TRUE);
1689
1690   return GTK_WIDGET (spin);
1691 }
1692
1693 /* Callback used when the spin button's adjustment changes.  We need to redraw
1694  * the arrows when the adjustment's range changes, and reevaluate our size request.
1695  */
1696 static void
1697 adjustment_changed_cb (GtkAdjustment *adjustment, gpointer data)
1698 {
1699   GtkSpinButton *spin_button;
1700
1701   spin_button = GTK_SPIN_BUTTON (data);
1702
1703   spin_button->timer_step = spin_button->adjustment->step_increment;
1704   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1705 }
1706
1707 /**
1708  * gtk_spin_button_set_adjustment:
1709  * @spin_button: a #GtkSpinButton
1710  * @adjustment: a #GtkAdjustment to replace the existing adjustment
1711  *
1712  * Replaces the #GtkAdjustment associated with @spin_button.
1713  **/
1714 void
1715 gtk_spin_button_set_adjustment (GtkSpinButton *spin_button,
1716                                 GtkAdjustment *adjustment)
1717 {
1718   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1719
1720   if (spin_button->adjustment != adjustment)
1721     {
1722       if (spin_button->adjustment)
1723         {
1724           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1725                                                 gtk_spin_button_value_changed,
1726                                                 spin_button);
1727           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1728                                                 adjustment_changed_cb,
1729                                                 spin_button);
1730           g_object_unref (spin_button->adjustment);
1731         }
1732       spin_button->adjustment = adjustment;
1733       if (adjustment)
1734         {
1735           g_object_ref_sink (adjustment);
1736           g_signal_connect (adjustment, "value-changed",
1737                             G_CALLBACK (gtk_spin_button_value_changed),
1738                             spin_button);
1739           g_signal_connect (adjustment, "changed",
1740                             G_CALLBACK (adjustment_changed_cb),
1741                             spin_button);
1742           spin_button->timer_step = spin_button->adjustment->step_increment;
1743         }
1744
1745       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1746     }
1747
1748   g_object_notify (G_OBJECT (spin_button), "adjustment");
1749 }
1750
1751 /**
1752  * gtk_spin_button_get_adjustment:
1753  * @spin_button: a #GtkSpinButton
1754  *
1755  * Get the adjustment associated with a #GtkSpinButton
1756  *
1757  * Return value: the #GtkAdjustment of @spin_button
1758  **/
1759 GtkAdjustment *
1760 gtk_spin_button_get_adjustment (GtkSpinButton *spin_button)
1761 {
1762   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), NULL);
1763
1764   return spin_button->adjustment;
1765 }
1766
1767 /**
1768  * gtk_spin_button_set_digits:
1769  * @spin_button: a #GtkSpinButton
1770  * @digits: the number of digits after the decimal point to be displayed for the spin button's value
1771  *
1772  * Set the precision to be displayed by @spin_button. Up to 20 digit precision
1773  * is allowed.
1774  **/
1775 void
1776 gtk_spin_button_set_digits (GtkSpinButton *spin_button,
1777                             guint          digits)
1778 {
1779   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1780
1781   if (spin_button->digits != digits)
1782     {
1783       spin_button->digits = digits;
1784       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
1785       g_object_notify (G_OBJECT (spin_button), "digits");
1786
1787       /* since lower/upper may have changed */
1788       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1789     }
1790 }
1791
1792 /**
1793  * gtk_spin_button_get_digits:
1794  * @spin_button: a #GtkSpinButton
1795  *
1796  * Fetches the precision of @spin_button. See gtk_spin_button_set_digits().
1797  *
1798  * Returns: the current precision
1799  **/
1800 guint
1801 gtk_spin_button_get_digits (GtkSpinButton *spin_button)
1802 {
1803   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1804
1805   return spin_button->digits;
1806 }
1807
1808 /**
1809  * gtk_spin_button_set_increments:
1810  * @spin_button: a #GtkSpinButton
1811  * @step: increment applied for a button 1 press.
1812  * @page: increment applied for a button 2 press.
1813  *
1814  * Sets the step and page increments for spin_button.  This affects how
1815  * quickly the value changes when the spin button's arrows are activated.
1816  **/
1817 void
1818 gtk_spin_button_set_increments (GtkSpinButton *spin_button,
1819                                 gdouble        step,
1820                                 gdouble        page)
1821 {
1822   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1823
1824   spin_button->adjustment->step_increment = step;
1825   spin_button->adjustment->page_increment = page;
1826 }
1827
1828 /**
1829  * gtk_spin_button_get_increments:
1830  * @spin_button: a #GtkSpinButton
1831  * @step: location to store step increment, or %NULL
1832  * @page: location to store page increment, or %NULL
1833  *
1834  * Gets the current step and page the increments used by @spin_button. See
1835  * gtk_spin_button_set_increments().
1836  **/
1837 void
1838 gtk_spin_button_get_increments (GtkSpinButton *spin_button,
1839                                 gdouble       *step,
1840                                 gdouble       *page)
1841 {
1842   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1843
1844   if (step)
1845     *step = spin_button->adjustment->step_increment;
1846   if (page)
1847     *page = spin_button->adjustment->page_increment;
1848 }
1849
1850 /**
1851  * gtk_spin_button_set_range:
1852  * @spin_button: a #GtkSpinButton
1853  * @min: minimum allowable value
1854  * @max: maximum allowable value
1855  *
1856  * Sets the minimum and maximum allowable values for @spin_button
1857  **/
1858 void
1859 gtk_spin_button_set_range (GtkSpinButton *spin_button,
1860                            gdouble        min,
1861                            gdouble        max)
1862 {
1863   gdouble value;
1864
1865   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1866
1867   spin_button->adjustment->lower = min;
1868   spin_button->adjustment->upper = max;
1869
1870   value = CLAMP (spin_button->adjustment->value,
1871                  spin_button->adjustment->lower,
1872                  (spin_button->adjustment->upper - spin_button->adjustment->page_size));
1873
1874   if (value != spin_button->adjustment->value)
1875     gtk_spin_button_set_value (spin_button, value);
1876
1877   gtk_adjustment_changed (spin_button->adjustment);
1878 }
1879
1880 /**
1881  * gtk_spin_button_get_range:
1882  * @spin_button: a #GtkSpinButton
1883  * @min: location to store minimum allowed value, or %NULL
1884  * @max: location to store maximum allowed value, or %NULL
1885  *
1886  * Gets the range allowed for @spin_button. See
1887  * gtk_spin_button_set_range().
1888  **/
1889 void
1890 gtk_spin_button_get_range (GtkSpinButton *spin_button,
1891                            gdouble       *min,
1892                            gdouble       *max)
1893 {
1894   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1895
1896   if (min)
1897     *min = spin_button->adjustment->lower;
1898   if (max)
1899     *max = spin_button->adjustment->upper;
1900 }
1901
1902 /**
1903  * gtk_spin_button_get_value:
1904  * @spin_button: a #GtkSpinButton
1905  *
1906  * Get the value in the @spin_button.
1907  *
1908  * Return value: the value of @spin_button
1909  **/
1910 gdouble
1911 gtk_spin_button_get_value (GtkSpinButton *spin_button)
1912 {
1913   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0.0);
1914
1915   return spin_button->adjustment->value;
1916 }
1917
1918 /**
1919  * gtk_spin_button_get_value_as_int:
1920  * @spin_button: a #GtkSpinButton
1921  *
1922  * Get the value @spin_button represented as an integer.
1923  *
1924  * Return value: the value of @spin_button
1925  **/
1926 gint
1927 gtk_spin_button_get_value_as_int (GtkSpinButton *spin_button)
1928 {
1929   gdouble val;
1930
1931   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1932
1933   val = spin_button->adjustment->value;
1934   if (val - floor (val) < ceil (val) - val)
1935     return floor (val);
1936   else
1937     return ceil (val);
1938 }
1939
1940 /**
1941  * gtk_spin_button_set_value:
1942  * @spin_button: a #GtkSpinButton
1943  * @value: the new value
1944  *
1945  * Set the value of @spin_button.
1946  **/
1947 void
1948 gtk_spin_button_set_value (GtkSpinButton *spin_button,
1949                            gdouble        value)
1950 {
1951   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1952
1953   if (fabs (value - spin_button->adjustment->value) > EPSILON)
1954     gtk_adjustment_set_value (spin_button->adjustment, value);
1955   else
1956     {
1957       gint return_val = FALSE;
1958       g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1959       if (return_val == FALSE)
1960         gtk_spin_button_default_output (spin_button);
1961     }
1962 }
1963
1964 /**
1965  * gtk_spin_button_set_update_policy:
1966  * @spin_button: a #GtkSpinButton
1967  * @policy: a #GtkSpinButtonUpdatePolicy value
1968  *
1969  * Sets the update behavior of a spin button. This determines whether the
1970  * spin button is always updated or only when a valid value is set.
1971  **/
1972 void
1973 gtk_spin_button_set_update_policy (GtkSpinButton             *spin_button,
1974                                    GtkSpinButtonUpdatePolicy  policy)
1975 {
1976   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1977
1978   if (spin_button->update_policy != policy)
1979     {
1980       spin_button->update_policy = policy;
1981       g_object_notify (G_OBJECT (spin_button), "update-policy");
1982     }
1983 }
1984
1985 /**
1986  * gtk_spin_button_get_update_policy:
1987  * @spin_button: a #GtkSpinButton
1988  *
1989  * Gets the update behavior of a spin button. See
1990  * gtk_spin_button_set_update_policy().
1991  *
1992  * Return value: the current update policy
1993  **/
1994 GtkSpinButtonUpdatePolicy
1995 gtk_spin_button_get_update_policy (GtkSpinButton *spin_button)
1996 {
1997   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), GTK_UPDATE_ALWAYS);
1998
1999   return spin_button->update_policy;
2000 }
2001
2002 /**
2003  * gtk_spin_button_set_numeric:
2004  * @spin_button: a #GtkSpinButton
2005  * @numeric: flag indicating if only numeric entry is allowed.
2006  *
2007  * Sets the flag that determines if non-numeric text can be typed into
2008  * the spin button.
2009  **/
2010 void
2011 gtk_spin_button_set_numeric (GtkSpinButton  *spin_button,
2012                              gboolean        numeric)
2013 {
2014   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2015
2016   numeric = numeric != FALSE;
2017
2018   if (spin_button->numeric != numeric)
2019     {
2020        spin_button->numeric = numeric;
2021        g_object_notify (G_OBJECT (spin_button), "numeric");
2022     }
2023 }
2024
2025 /**
2026  * gtk_spin_button_get_numeric:
2027  * @spin_button: a #GtkSpinButton
2028  *
2029  * Returns whether non-numeric text can be typed into the spin button.
2030  * See gtk_spin_button_set_numeric().
2031  *
2032  * Return value: %TRUE if only numeric text can be entered
2033  **/
2034 gboolean
2035 gtk_spin_button_get_numeric (GtkSpinButton *spin_button)
2036 {
2037   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2038
2039   return spin_button->numeric;
2040 }
2041
2042 /**
2043  * gtk_spin_button_set_wrap:
2044  * @spin_button: a #GtkSpinButton
2045  * @wrap: a flag indicating if wrapping behavior is performed.
2046  *
2047  * Sets the flag that determines if a spin button value wraps around to the
2048  * opposite limit when the upper or lower limit of the range is exceeded.
2049  **/
2050 void
2051 gtk_spin_button_set_wrap (GtkSpinButton  *spin_button,
2052                           gboolean        wrap)
2053 {
2054   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2055
2056   wrap = wrap != FALSE;
2057
2058   if (spin_button->wrap != wrap)
2059     {
2060        spin_button->wrap = (wrap != 0);
2061
2062        g_object_notify (G_OBJECT (spin_button), "wrap");
2063     }
2064 }
2065
2066 /**
2067  * gtk_spin_button_get_wrap:
2068  * @spin_button: a #GtkSpinButton
2069  *
2070  * Returns whether the spin button's value wraps around to the
2071  * opposite limit when the upper or lower limit of the range is
2072  * exceeded. See gtk_spin_button_set_wrap().
2073  *
2074  * Return value: %TRUE if the spin button wraps around
2075  **/
2076 gboolean
2077 gtk_spin_button_get_wrap (GtkSpinButton *spin_button)
2078 {
2079   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2080
2081   return spin_button->wrap;
2082 }
2083
2084 static gint
2085 spin_button_get_arrow_size (GtkSpinButton *spin_button)
2086 {
2087   gint size = pango_font_description_get_size (GTK_WIDGET (spin_button)->style->font_desc);
2088   gint arrow_size;
2089
2090   arrow_size = MAX (PANGO_PIXELS (size), MIN_ARROW_WIDTH);
2091
2092   return arrow_size - arrow_size % 2; /* force even */
2093 }
2094
2095 /**
2096  * spin_button_get_shadow_type:
2097  * @spin_button: a #GtkSpinButton
2098  *
2099  * Convenience function to Get the shadow type from the underlying widget's
2100  * style.
2101  *
2102  * Return value: the #GtkShadowType
2103  **/
2104 static gint
2105 spin_button_get_shadow_type (GtkSpinButton *spin_button)
2106 {
2107   GtkShadowType rc_shadow_type;
2108
2109   gtk_widget_style_get (GTK_WIDGET (spin_button), "shadow-type", &rc_shadow_type, NULL);
2110
2111   return rc_shadow_type;
2112 }
2113
2114 /**
2115  * gtk_spin_button_set_snap_to_ticks:
2116  * @spin_button: a #GtkSpinButton
2117  * @snap_to_ticks: a flag indicating if invalid values should be corrected.
2118  *
2119  * Sets the policy as to whether values are corrected to the nearest step
2120  * increment when a spin button is activated after providing an invalid value.
2121  **/
2122 void
2123 gtk_spin_button_set_snap_to_ticks (GtkSpinButton *spin_button,
2124                                    gboolean       snap_to_ticks)
2125 {
2126   guint new_val;
2127
2128   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2129
2130   new_val = (snap_to_ticks != 0);
2131
2132   if (new_val != spin_button->snap_to_ticks)
2133     {
2134       spin_button->snap_to_ticks = new_val;
2135       if (new_val && GTK_ENTRY (spin_button)->editable)
2136         gtk_spin_button_update (spin_button);
2137
2138       g_object_notify (G_OBJECT (spin_button), "snap-to-ticks");
2139     }
2140 }
2141
2142 /**
2143  * gtk_spin_button_get_snap_to_ticks:
2144  * @spin_button: a #GtkSpinButton
2145  *
2146  * Returns whether the values are corrected to the nearest step. See
2147  * gtk_spin_button_set_snap_to_ticks().
2148  *
2149  * Return value: %TRUE if values are snapped to the nearest step.
2150  **/
2151 gboolean
2152 gtk_spin_button_get_snap_to_ticks (GtkSpinButton *spin_button)
2153 {
2154   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2155
2156   return spin_button->snap_to_ticks;
2157 }
2158
2159 /**
2160  * gtk_spin_button_spin:
2161  * @spin_button: a #GtkSpinButton
2162  * @direction: a #GtkSpinType indicating the direction to spin.
2163  * @increment: step increment to apply in the specified direction.
2164  *
2165  * Increment or decrement a spin button's value in a specified direction
2166  * by a specified amount.
2167  **/
2168 void
2169 gtk_spin_button_spin (GtkSpinButton *spin_button,
2170                       GtkSpinType    direction,
2171                       gdouble        increment)
2172 {
2173   GtkAdjustment *adj;
2174   gdouble diff;
2175
2176   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2177
2178   adj = spin_button->adjustment;
2179
2180   /* for compatibility with the 1.0.x version of this function */
2181   if (increment != 0 && increment != adj->step_increment &&
2182       (direction == GTK_SPIN_STEP_FORWARD ||
2183        direction == GTK_SPIN_STEP_BACKWARD))
2184     {
2185       if (direction == GTK_SPIN_STEP_BACKWARD && increment > 0)
2186         increment = -increment;
2187       direction = GTK_SPIN_USER_DEFINED;
2188     }
2189
2190   switch (direction)
2191     {
2192     case GTK_SPIN_STEP_FORWARD:
2193
2194       gtk_spin_button_real_spin (spin_button, adj->step_increment);
2195       break;
2196
2197     case GTK_SPIN_STEP_BACKWARD:
2198
2199       gtk_spin_button_real_spin (spin_button, -adj->step_increment);
2200       break;
2201
2202     case GTK_SPIN_PAGE_FORWARD:
2203
2204       gtk_spin_button_real_spin (spin_button, adj->page_increment);
2205       break;
2206
2207     case GTK_SPIN_PAGE_BACKWARD:
2208
2209       gtk_spin_button_real_spin (spin_button, -adj->page_increment);
2210       break;
2211
2212     case GTK_SPIN_HOME:
2213
2214       diff = adj->value - adj->lower;
2215       if (diff > EPSILON)
2216         gtk_spin_button_real_spin (spin_button, -diff);
2217       break;
2218
2219     case GTK_SPIN_END:
2220
2221       diff = adj->upper - adj->value;
2222       if (diff > EPSILON)
2223         gtk_spin_button_real_spin (spin_button, diff);
2224       break;
2225
2226     case GTK_SPIN_USER_DEFINED:
2227
2228       if (increment != 0)
2229         gtk_spin_button_real_spin (spin_button, increment);
2230       break;
2231
2232     default:
2233       break;
2234     }
2235 }
2236
2237 /**
2238  * gtk_spin_button_update:
2239  * @spin_button: a #GtkSpinButton
2240  *
2241  * Manually force an update of the spin button.
2242  **/
2243 void
2244 gtk_spin_button_update (GtkSpinButton *spin_button)
2245 {
2246   gdouble val;
2247   gint error = 0;
2248   gint return_val;
2249
2250   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2251
2252   return_val = FALSE;
2253   g_signal_emit (spin_button, spinbutton_signals[INPUT], 0, &val, &return_val);
2254   if (return_val == FALSE)
2255     {
2256       return_val = gtk_spin_button_default_input (spin_button, &val);
2257       error = (return_val == GTK_INPUT_ERROR);
2258     }
2259   else if (return_val == GTK_INPUT_ERROR)
2260     error = 1;
2261
2262   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
2263
2264   if (spin_button->update_policy == GTK_UPDATE_ALWAYS)
2265     {
2266       if (val < spin_button->adjustment->lower)
2267         val = spin_button->adjustment->lower;
2268       else if (val > spin_button->adjustment->upper)
2269         val = spin_button->adjustment->upper;
2270     }
2271   else if ((spin_button->update_policy == GTK_UPDATE_IF_VALID) &&
2272            (error ||
2273            val < spin_button->adjustment->lower ||
2274            val > spin_button->adjustment->upper))
2275     {
2276       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
2277       return;
2278     }
2279
2280   if (spin_button->snap_to_ticks)
2281     gtk_spin_button_snap (spin_button, val);
2282   else
2283     gtk_spin_button_set_value (spin_button, val);
2284 }
2285
2286 #define __GTK_SPIN_BUTTON_C__
2287 #include "gtkaliasdef.c"