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