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