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       const gchar *entry_text;
1431
1432       entry_length = gtk_entry_get_text_length (entry);
1433       entry_text = gtk_entry_get_text (entry);
1434
1435       lc = localeconv ();
1436
1437       if (*(lc->negative_sign))
1438         neg_sign = *(lc->negative_sign);
1439       else
1440         neg_sign = '-';
1441
1442       if (*(lc->positive_sign))
1443         pos_sign = *(lc->positive_sign);
1444       else
1445         pos_sign = '+';
1446
1447 #ifdef G_OS_WIN32
1448       /* Workaround for bug caused by some Windows application messing
1449        * up the positive sign of the current locale, more specifically
1450        * HKEY_CURRENT_USER\Control Panel\International\sPositiveSign.
1451        * See bug #330743 and for instance
1452        * http://www.msnewsgroups.net/group/microsoft.public.dotnet.languages.csharp/topic36024.aspx
1453        *
1454        * I don't know if the positive sign always gets bogusly set to
1455        * a digit when the above Registry value is corrupted as
1456        * described. (In my test case, it got set to "8", and in the
1457        * bug report above it presumably was set ot "0".) Probably it
1458        * might get set to almost anything? So how to distinguish a
1459        * bogus value from some correct one for some locale? That is
1460        * probably hard, but at least we should filter out the
1461        * digits...
1462        */
1463       if (pos_sign >= '0' && pos_sign <= '9')
1464         pos_sign = '+';
1465 #endif
1466
1467       for (sign=0, i=0; i<entry_length; i++)
1468         if ((entry_text[i] == neg_sign) ||
1469             (entry_text[i] == pos_sign))
1470           {
1471             sign = 1;
1472             break;
1473           }
1474
1475       if (sign && !(*position))
1476         return;
1477
1478       for (dotpos=-1, i=0; i<entry_length; i++)
1479         if (entry_text[i] == *(lc->decimal_point))
1480           {
1481             dotpos = i;
1482             break;
1483           }
1484
1485       if (dotpos > -1 && *position > dotpos &&
1486           (gint)spin->digits - entry_length
1487             + dotpos - new_text_length + 1 < 0)
1488         return;
1489
1490       for (i = 0; i < new_text_length; i++)
1491         {
1492           if (new_text[i] == neg_sign || new_text[i] == pos_sign)
1493             {
1494               if (sign || (*position) || i)
1495                 return;
1496               sign = TRUE;
1497             }
1498           else if (new_text[i] == *(lc->decimal_point))
1499             {
1500               if (!spin->digits || dotpos > -1 ||
1501                   (new_text_length - 1 - i + entry_length
1502                     - *position > (gint)spin->digits))
1503                 return;
1504               dotpos = *position + i;
1505             }
1506           else if (new_text[i] < 0x30 || new_text[i] > 0x39)
1507             return;
1508         }
1509     }
1510
1511   parent_editable_iface->insert_text (editable, new_text,
1512                                       new_text_length, position);
1513 }
1514
1515 static void
1516 gtk_spin_button_real_spin (GtkSpinButton *spin_button,
1517                            gdouble        increment)
1518 {
1519   GtkAdjustment *adj;
1520   gdouble new_value = 0.0;
1521   gboolean wrapped = FALSE;
1522
1523   adj = spin_button->adjustment;
1524
1525   new_value = adj->value + increment;
1526
1527   if (increment > 0)
1528     {
1529       if (spin_button->wrap)
1530         {
1531           if (fabs (adj->value - adj->upper) < EPSILON)
1532             {
1533               new_value = adj->lower;
1534               wrapped = TRUE;
1535             }
1536           else if (new_value > adj->upper)
1537             new_value = adj->upper;
1538         }
1539       else
1540         new_value = MIN (new_value, adj->upper);
1541     }
1542   else if (increment < 0)
1543     {
1544       if (spin_button->wrap)
1545         {
1546           if (fabs (adj->value - adj->lower) < EPSILON)
1547             {
1548               new_value = adj->upper;
1549               wrapped = TRUE;
1550             }
1551           else if (new_value < adj->lower)
1552             new_value = adj->lower;
1553         }
1554       else
1555         new_value = MAX (new_value, adj->lower);
1556     }
1557
1558   if (fabs (new_value - adj->value) > EPSILON)
1559     gtk_adjustment_set_value (adj, new_value);
1560
1561   if (wrapped)
1562     g_signal_emit (spin_button, spinbutton_signals[WRAPPED], 0);
1563
1564   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1565 }
1566
1567 static gint
1568 gtk_spin_button_default_input (GtkSpinButton *spin_button,
1569                                gdouble       *new_val)
1570 {
1571   gchar *err = NULL;
1572
1573   *new_val = g_strtod (gtk_entry_get_text (GTK_ENTRY (spin_button)), &err);
1574   if (*err)
1575     return GTK_INPUT_ERROR;
1576   else
1577     return FALSE;
1578 }
1579
1580 static gint
1581 gtk_spin_button_default_output (GtkSpinButton *spin_button)
1582 {
1583   gchar *buf = g_strdup_printf ("%0.*f", spin_button->digits, spin_button->adjustment->value);
1584
1585   if (strcmp (buf, gtk_entry_get_text (GTK_ENTRY (spin_button))))
1586     gtk_entry_set_text (GTK_ENTRY (spin_button), buf);
1587   g_free (buf);
1588   return FALSE;
1589 }
1590
1591
1592 /***********************************************************
1593  ***********************************************************
1594  ***                  Public interface                   ***
1595  ***********************************************************
1596  ***********************************************************/
1597
1598
1599 void
1600 gtk_spin_button_configure (GtkSpinButton  *spin_button,
1601                            GtkAdjustment  *adjustment,
1602                            gdouble         climb_rate,
1603                            guint           digits)
1604 {
1605   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1606
1607   if (adjustment)
1608     gtk_spin_button_set_adjustment (spin_button, adjustment);
1609   else
1610     adjustment = spin_button->adjustment;
1611
1612   g_object_freeze_notify (G_OBJECT (spin_button));
1613   if (spin_button->digits != digits)
1614     {
1615       spin_button->digits = digits;
1616       g_object_notify (G_OBJECT (spin_button), "digits");
1617     }
1618
1619   if (spin_button->climb_rate != climb_rate)
1620     {
1621       spin_button->climb_rate = climb_rate;
1622       g_object_notify (G_OBJECT (spin_button), "climb-rate");
1623     }
1624   g_object_thaw_notify (G_OBJECT (spin_button));
1625
1626   gtk_adjustment_value_changed (adjustment);
1627 }
1628
1629 GtkWidget *
1630 gtk_spin_button_new (GtkAdjustment *adjustment,
1631                      gdouble        climb_rate,
1632                      guint          digits)
1633 {
1634   GtkSpinButton *spin;
1635
1636   if (adjustment)
1637     g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
1638
1639   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1640
1641   gtk_spin_button_configure (spin, adjustment, climb_rate, digits);
1642
1643   return GTK_WIDGET (spin);
1644 }
1645
1646 /**
1647  * gtk_spin_button_new_with_range:
1648  * @min: Minimum allowable value
1649  * @max: Maximum allowable value
1650  * @step: Increment added or subtracted by spinning the widget
1651  *
1652  * This is a convenience constructor that allows creation of a numeric
1653  * #GtkSpinButton without manually creating an adjustment. The value is
1654  * initially set to the minimum value and a page increment of 10 * @step
1655  * is the default. The precision of the spin button is equivalent to the
1656  * precision of @step.
1657  *
1658  * Note that the way in which the precision is derived works best if @step
1659  * is a power of ten. If the resulting precision is not suitable for your
1660  * needs, use gtk_spin_button_set_digits() to correct it.
1661  *
1662  * Return value: The new spin button as a #GtkWidget.
1663  **/
1664 GtkWidget *
1665 gtk_spin_button_new_with_range (gdouble min,
1666                                 gdouble max,
1667                                 gdouble step)
1668 {
1669   GtkObject *adj;
1670   GtkSpinButton *spin;
1671   gint digits;
1672
1673   g_return_val_if_fail (min <= max, NULL);
1674   g_return_val_if_fail (step != 0.0, NULL);
1675
1676   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1677
1678   adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
1679
1680   if (fabs (step) >= 1.0 || step == 0.0)
1681     digits = 0;
1682   else {
1683     digits = abs ((gint) floor (log10 (fabs (step))));
1684     if (digits > MAX_DIGITS)
1685       digits = MAX_DIGITS;
1686   }
1687
1688   gtk_spin_button_configure (spin, GTK_ADJUSTMENT (adj), step, digits);
1689
1690   gtk_spin_button_set_numeric (spin, TRUE);
1691
1692   return GTK_WIDGET (spin);
1693 }
1694
1695 static void
1696 warn_nonzero_page_size (GtkAdjustment *adjustment)
1697 {
1698   if (gtk_adjustment_get_page_size (adjustment) != 0.0)
1699     g_warning ("GtkSpinButton: setting an adjustment with non-zero page size is deprecated");
1700 }
1701
1702 /* Callback used when the spin button's adjustment changes.  We need to redraw
1703  * the arrows when the adjustment's range changes, and reevaluate our size request.
1704  */
1705 static void
1706 adjustment_changed_cb (GtkAdjustment *adjustment, gpointer data)
1707 {
1708   GtkSpinButton *spin_button;
1709
1710   spin_button = GTK_SPIN_BUTTON (data);
1711
1712   spin_button->timer_step = spin_button->adjustment->step_increment;
1713   warn_nonzero_page_size (adjustment);
1714   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1715 }
1716
1717 /**
1718  * gtk_spin_button_set_adjustment:
1719  * @spin_button: a #GtkSpinButton
1720  * @adjustment: a #GtkAdjustment to replace the existing adjustment
1721  *
1722  * Replaces the #GtkAdjustment associated with @spin_button.
1723  **/
1724 void
1725 gtk_spin_button_set_adjustment (GtkSpinButton *spin_button,
1726                                 GtkAdjustment *adjustment)
1727 {
1728   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1729
1730   if (spin_button->adjustment != adjustment)
1731     {
1732       if (spin_button->adjustment)
1733         {
1734           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1735                                                 gtk_spin_button_value_changed,
1736                                                 spin_button);
1737           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1738                                                 adjustment_changed_cb,
1739                                                 spin_button);
1740           g_object_unref (spin_button->adjustment);
1741         }
1742       spin_button->adjustment = adjustment;
1743       if (adjustment)
1744         {
1745           g_object_ref_sink (adjustment);
1746           g_signal_connect (adjustment, "value-changed",
1747                             G_CALLBACK (gtk_spin_button_value_changed),
1748                             spin_button);
1749           g_signal_connect (adjustment, "changed",
1750                             G_CALLBACK (adjustment_changed_cb),
1751                             spin_button);
1752           spin_button->timer_step = spin_button->adjustment->step_increment;
1753           warn_nonzero_page_size (adjustment);
1754         }
1755
1756       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1757     }
1758
1759   g_object_notify (G_OBJECT (spin_button), "adjustment");
1760 }
1761
1762 /**
1763  * gtk_spin_button_get_adjustment:
1764  * @spin_button: a #GtkSpinButton
1765  *
1766  * Get the adjustment associated with a #GtkSpinButton
1767  *
1768  * Return value: the #GtkAdjustment of @spin_button
1769  **/
1770 GtkAdjustment *
1771 gtk_spin_button_get_adjustment (GtkSpinButton *spin_button)
1772 {
1773   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), NULL);
1774
1775   return spin_button->adjustment;
1776 }
1777
1778 /**
1779  * gtk_spin_button_set_digits:
1780  * @spin_button: a #GtkSpinButton
1781  * @digits: the number of digits after the decimal point to be displayed for the spin button's value
1782  *
1783  * Set the precision to be displayed by @spin_button. Up to 20 digit precision
1784  * is allowed.
1785  **/
1786 void
1787 gtk_spin_button_set_digits (GtkSpinButton *spin_button,
1788                             guint          digits)
1789 {
1790   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1791
1792   if (spin_button->digits != digits)
1793     {
1794       spin_button->digits = digits;
1795       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
1796       g_object_notify (G_OBJECT (spin_button), "digits");
1797
1798       /* since lower/upper may have changed */
1799       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1800     }
1801 }
1802
1803 /**
1804  * gtk_spin_button_get_digits:
1805  * @spin_button: a #GtkSpinButton
1806  *
1807  * Fetches the precision of @spin_button. See gtk_spin_button_set_digits().
1808  *
1809  * Returns: the current precision
1810  **/
1811 guint
1812 gtk_spin_button_get_digits (GtkSpinButton *spin_button)
1813 {
1814   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1815
1816   return spin_button->digits;
1817 }
1818
1819 /**
1820  * gtk_spin_button_set_increments:
1821  * @spin_button: a #GtkSpinButton
1822  * @step: increment applied for a button 1 press.
1823  * @page: increment applied for a button 2 press.
1824  *
1825  * Sets the step and page increments for spin_button.  This affects how
1826  * quickly the value changes when the spin button's arrows are activated.
1827  **/
1828 void
1829 gtk_spin_button_set_increments (GtkSpinButton *spin_button,
1830                                 gdouble        step,
1831                                 gdouble        page)
1832 {
1833   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1834
1835   spin_button->adjustment->step_increment = step;
1836   spin_button->adjustment->page_increment = page;
1837 }
1838
1839 /**
1840  * gtk_spin_button_get_increments:
1841  * @spin_button: a #GtkSpinButton
1842  * @step: location to store step increment, or %NULL
1843  * @page: location to store page increment, or %NULL
1844  *
1845  * Gets the current step and page the increments used by @spin_button. See
1846  * gtk_spin_button_set_increments().
1847  **/
1848 void
1849 gtk_spin_button_get_increments (GtkSpinButton *spin_button,
1850                                 gdouble       *step,
1851                                 gdouble       *page)
1852 {
1853   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1854
1855   if (step)
1856     *step = spin_button->adjustment->step_increment;
1857   if (page)
1858     *page = spin_button->adjustment->page_increment;
1859 }
1860
1861 /**
1862  * gtk_spin_button_set_range:
1863  * @spin_button: a #GtkSpinButton
1864  * @min: minimum allowable value
1865  * @max: maximum allowable value
1866  *
1867  * Sets the minimum and maximum allowable values for @spin_button
1868  **/
1869 void
1870 gtk_spin_button_set_range (GtkSpinButton *spin_button,
1871                            gdouble        min,
1872                            gdouble        max)
1873 {
1874   gdouble value;
1875
1876   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1877
1878   spin_button->adjustment->lower = min;
1879   spin_button->adjustment->upper = max;
1880
1881   value = CLAMP (spin_button->adjustment->value,
1882                  spin_button->adjustment->lower,
1883                  (spin_button->adjustment->upper - spin_button->adjustment->page_size));
1884
1885   if (value != spin_button->adjustment->value)
1886     gtk_spin_button_set_value (spin_button, value);
1887
1888   gtk_adjustment_changed (spin_button->adjustment);
1889 }
1890
1891 /**
1892  * gtk_spin_button_get_range:
1893  * @spin_button: a #GtkSpinButton
1894  * @min: location to store minimum allowed value, or %NULL
1895  * @max: location to store maximum allowed value, or %NULL
1896  *
1897  * Gets the range allowed for @spin_button. See
1898  * gtk_spin_button_set_range().
1899  **/
1900 void
1901 gtk_spin_button_get_range (GtkSpinButton *spin_button,
1902                            gdouble       *min,
1903                            gdouble       *max)
1904 {
1905   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1906
1907   if (min)
1908     *min = spin_button->adjustment->lower;
1909   if (max)
1910     *max = spin_button->adjustment->upper;
1911 }
1912
1913 /**
1914  * gtk_spin_button_get_value:
1915  * @spin_button: a #GtkSpinButton
1916  *
1917  * Get the value in the @spin_button.
1918  *
1919  * Return value: the value of @spin_button
1920  **/
1921 gdouble
1922 gtk_spin_button_get_value (GtkSpinButton *spin_button)
1923 {
1924   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0.0);
1925
1926   return spin_button->adjustment->value;
1927 }
1928
1929 /**
1930  * gtk_spin_button_get_value_as_int:
1931  * @spin_button: a #GtkSpinButton
1932  *
1933  * Get the value @spin_button represented as an integer.
1934  *
1935  * Return value: the value of @spin_button
1936  **/
1937 gint
1938 gtk_spin_button_get_value_as_int (GtkSpinButton *spin_button)
1939 {
1940   gdouble val;
1941
1942   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1943
1944   val = spin_button->adjustment->value;
1945   if (val - floor (val) < ceil (val) - val)
1946     return floor (val);
1947   else
1948     return ceil (val);
1949 }
1950
1951 /**
1952  * gtk_spin_button_set_value:
1953  * @spin_button: a #GtkSpinButton
1954  * @value: the new value
1955  *
1956  * Set the value of @spin_button.
1957  **/
1958 void
1959 gtk_spin_button_set_value (GtkSpinButton *spin_button,
1960                            gdouble        value)
1961 {
1962   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1963
1964   if (fabs (value - spin_button->adjustment->value) > EPSILON)
1965     gtk_adjustment_set_value (spin_button->adjustment, value);
1966   else
1967     {
1968       gint return_val = FALSE;
1969       g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1970       if (return_val == FALSE)
1971         gtk_spin_button_default_output (spin_button);
1972     }
1973 }
1974
1975 /**
1976  * gtk_spin_button_set_update_policy:
1977  * @spin_button: a #GtkSpinButton
1978  * @policy: a #GtkSpinButtonUpdatePolicy value
1979  *
1980  * Sets the update behavior of a spin button. This determines whether the
1981  * spin button is always updated or only when a valid value is set.
1982  **/
1983 void
1984 gtk_spin_button_set_update_policy (GtkSpinButton             *spin_button,
1985                                    GtkSpinButtonUpdatePolicy  policy)
1986 {
1987   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1988
1989   if (spin_button->update_policy != policy)
1990     {
1991       spin_button->update_policy = policy;
1992       g_object_notify (G_OBJECT (spin_button), "update-policy");
1993     }
1994 }
1995
1996 /**
1997  * gtk_spin_button_get_update_policy:
1998  * @spin_button: a #GtkSpinButton
1999  *
2000  * Gets the update behavior of a spin button. See
2001  * gtk_spin_button_set_update_policy().
2002  *
2003  * Return value: the current update policy
2004  **/
2005 GtkSpinButtonUpdatePolicy
2006 gtk_spin_button_get_update_policy (GtkSpinButton *spin_button)
2007 {
2008   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), GTK_UPDATE_ALWAYS);
2009
2010   return spin_button->update_policy;
2011 }
2012
2013 /**
2014  * gtk_spin_button_set_numeric:
2015  * @spin_button: a #GtkSpinButton
2016  * @numeric: flag indicating if only numeric entry is allowed.
2017  *
2018  * Sets the flag that determines if non-numeric text can be typed into
2019  * the spin button.
2020  **/
2021 void
2022 gtk_spin_button_set_numeric (GtkSpinButton  *spin_button,
2023                              gboolean        numeric)
2024 {
2025   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2026
2027   numeric = numeric != FALSE;
2028
2029   if (spin_button->numeric != numeric)
2030     {
2031        spin_button->numeric = numeric;
2032        g_object_notify (G_OBJECT (spin_button), "numeric");
2033     }
2034 }
2035
2036 /**
2037  * gtk_spin_button_get_numeric:
2038  * @spin_button: a #GtkSpinButton
2039  *
2040  * Returns whether non-numeric text can be typed into the spin button.
2041  * See gtk_spin_button_set_numeric().
2042  *
2043  * Return value: %TRUE if only numeric text can be entered
2044  **/
2045 gboolean
2046 gtk_spin_button_get_numeric (GtkSpinButton *spin_button)
2047 {
2048   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2049
2050   return spin_button->numeric;
2051 }
2052
2053 /**
2054  * gtk_spin_button_set_wrap:
2055  * @spin_button: a #GtkSpinButton
2056  * @wrap: a flag indicating if wrapping behavior is performed.
2057  *
2058  * Sets the flag that determines if a spin button value wraps around to the
2059  * opposite limit when the upper or lower limit of the range is exceeded.
2060  **/
2061 void
2062 gtk_spin_button_set_wrap (GtkSpinButton  *spin_button,
2063                           gboolean        wrap)
2064 {
2065   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2066
2067   wrap = wrap != FALSE;
2068
2069   if (spin_button->wrap != wrap)
2070     {
2071        spin_button->wrap = (wrap != 0);
2072
2073        g_object_notify (G_OBJECT (spin_button), "wrap");
2074     }
2075 }
2076
2077 /**
2078  * gtk_spin_button_get_wrap:
2079  * @spin_button: a #GtkSpinButton
2080  *
2081  * Returns whether the spin button's value wraps around to the
2082  * opposite limit when the upper or lower limit of the range is
2083  * exceeded. See gtk_spin_button_set_wrap().
2084  *
2085  * Return value: %TRUE if the spin button wraps around
2086  **/
2087 gboolean
2088 gtk_spin_button_get_wrap (GtkSpinButton *spin_button)
2089 {
2090   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2091
2092   return spin_button->wrap;
2093 }
2094
2095 static gint
2096 spin_button_get_arrow_size (GtkSpinButton *spin_button)
2097 {
2098   gint size = pango_font_description_get_size (GTK_WIDGET (spin_button)->style->font_desc);
2099   gint arrow_size;
2100
2101   arrow_size = MAX (PANGO_PIXELS (size), MIN_ARROW_WIDTH);
2102
2103   return arrow_size - arrow_size % 2; /* force even */
2104 }
2105
2106 /**
2107  * spin_button_get_shadow_type:
2108  * @spin_button: a #GtkSpinButton
2109  *
2110  * Convenience function to Get the shadow type from the underlying widget's
2111  * style.
2112  *
2113  * Return value: the #GtkShadowType
2114  **/
2115 static gint
2116 spin_button_get_shadow_type (GtkSpinButton *spin_button)
2117 {
2118   GtkShadowType rc_shadow_type;
2119
2120   gtk_widget_style_get (GTK_WIDGET (spin_button), "shadow-type", &rc_shadow_type, NULL);
2121
2122   return rc_shadow_type;
2123 }
2124
2125 /**
2126  * gtk_spin_button_set_snap_to_ticks:
2127  * @spin_button: a #GtkSpinButton
2128  * @snap_to_ticks: a flag indicating if invalid values should be corrected.
2129  *
2130  * Sets the policy as to whether values are corrected to the nearest step
2131  * increment when a spin button is activated after providing an invalid value.
2132  **/
2133 void
2134 gtk_spin_button_set_snap_to_ticks (GtkSpinButton *spin_button,
2135                                    gboolean       snap_to_ticks)
2136 {
2137   guint new_val;
2138
2139   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2140
2141   new_val = (snap_to_ticks != 0);
2142
2143   if (new_val != spin_button->snap_to_ticks)
2144     {
2145       spin_button->snap_to_ticks = new_val;
2146       if (new_val && GTK_ENTRY (spin_button)->editable)
2147         gtk_spin_button_update (spin_button);
2148
2149       g_object_notify (G_OBJECT (spin_button), "snap-to-ticks");
2150     }
2151 }
2152
2153 /**
2154  * gtk_spin_button_get_snap_to_ticks:
2155  * @spin_button: a #GtkSpinButton
2156  *
2157  * Returns whether the values are corrected to the nearest step. See
2158  * gtk_spin_button_set_snap_to_ticks().
2159  *
2160  * Return value: %TRUE if values are snapped to the nearest step.
2161  **/
2162 gboolean
2163 gtk_spin_button_get_snap_to_ticks (GtkSpinButton *spin_button)
2164 {
2165   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2166
2167   return spin_button->snap_to_ticks;
2168 }
2169
2170 /**
2171  * gtk_spin_button_spin:
2172  * @spin_button: a #GtkSpinButton
2173  * @direction: a #GtkSpinType indicating the direction to spin.
2174  * @increment: step increment to apply in the specified direction.
2175  *
2176  * Increment or decrement a spin button's value in a specified direction
2177  * by a specified amount.
2178  **/
2179 void
2180 gtk_spin_button_spin (GtkSpinButton *spin_button,
2181                       GtkSpinType    direction,
2182                       gdouble        increment)
2183 {
2184   GtkAdjustment *adj;
2185   gdouble diff;
2186
2187   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2188
2189   adj = spin_button->adjustment;
2190
2191   /* for compatibility with the 1.0.x version of this function */
2192   if (increment != 0 && increment != adj->step_increment &&
2193       (direction == GTK_SPIN_STEP_FORWARD ||
2194        direction == GTK_SPIN_STEP_BACKWARD))
2195     {
2196       if (direction == GTK_SPIN_STEP_BACKWARD && increment > 0)
2197         increment = -increment;
2198       direction = GTK_SPIN_USER_DEFINED;
2199     }
2200
2201   switch (direction)
2202     {
2203     case GTK_SPIN_STEP_FORWARD:
2204
2205       gtk_spin_button_real_spin (spin_button, adj->step_increment);
2206       break;
2207
2208     case GTK_SPIN_STEP_BACKWARD:
2209
2210       gtk_spin_button_real_spin (spin_button, -adj->step_increment);
2211       break;
2212
2213     case GTK_SPIN_PAGE_FORWARD:
2214
2215       gtk_spin_button_real_spin (spin_button, adj->page_increment);
2216       break;
2217
2218     case GTK_SPIN_PAGE_BACKWARD:
2219
2220       gtk_spin_button_real_spin (spin_button, -adj->page_increment);
2221       break;
2222
2223     case GTK_SPIN_HOME:
2224
2225       diff = adj->value - adj->lower;
2226       if (diff > EPSILON)
2227         gtk_spin_button_real_spin (spin_button, -diff);
2228       break;
2229
2230     case GTK_SPIN_END:
2231
2232       diff = adj->upper - adj->value;
2233       if (diff > EPSILON)
2234         gtk_spin_button_real_spin (spin_button, diff);
2235       break;
2236
2237     case GTK_SPIN_USER_DEFINED:
2238
2239       if (increment != 0)
2240         gtk_spin_button_real_spin (spin_button, increment);
2241       break;
2242
2243     default:
2244       break;
2245     }
2246 }
2247
2248 /**
2249  * gtk_spin_button_update:
2250  * @spin_button: a #GtkSpinButton
2251  *
2252  * Manually force an update of the spin button.
2253  **/
2254 void
2255 gtk_spin_button_update (GtkSpinButton *spin_button)
2256 {
2257   gdouble val;
2258   gint error = 0;
2259   gint return_val;
2260
2261   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2262
2263   return_val = FALSE;
2264   g_signal_emit (spin_button, spinbutton_signals[INPUT], 0, &val, &return_val);
2265   if (return_val == FALSE)
2266     {
2267       return_val = gtk_spin_button_default_input (spin_button, &val);
2268       error = (return_val == GTK_INPUT_ERROR);
2269     }
2270   else if (return_val == GTK_INPUT_ERROR)
2271     error = 1;
2272
2273   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
2274
2275   if (spin_button->update_policy == GTK_UPDATE_ALWAYS)
2276     {
2277       if (val < spin_button->adjustment->lower)
2278         val = spin_button->adjustment->lower;
2279       else if (val > spin_button->adjustment->upper)
2280         val = spin_button->adjustment->upper;
2281     }
2282   else if ((spin_button->update_policy == GTK_UPDATE_IF_VALID) &&
2283            (error ||
2284            val < spin_button->adjustment->lower ||
2285            val > spin_button->adjustment->upper))
2286     {
2287       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
2288       return;
2289     }
2290
2291   if (spin_button->snap_to_ticks)
2292     gtk_spin_button_snap (spin_button, val);
2293   else
2294     gtk_spin_button_set_value (spin_button, val);
2295 }
2296
2297 #define __GTK_SPIN_BUTTON_C__
2298 #include "gtkaliasdef.c"