Pileus Git - ~andy/gtk/blob - gtk/gtkspinbutton.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * GtkSpinButton widget for GTK+
   5  * Copyright (C) 1998 Lars Hamann and Stefan Jeske
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  25  * file for a list of people on the GTK+ Team.  See the ChangeLog
  26  * files for a list of changes.  These files are distributed with
  27  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  28  */
  29
  30 #include "config.h"
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <math.h>
  34 #include <string.h>
  35 #include <locale.h>
  36 #include "gdk/gdkkeysyms.h"
  37 #include "gtkbindings.h"
  38 #include "gtkspinbutton.h"
  39 #include "gtkentryprivate.h"
  40 #include "gtkmain.h"
  41 #include "gtkmarshalers.h"
  42 #include "gtksettings.h"
  43 #include "gtkprivate.h"
  44 #include "gtkintl.h"
  45 #include "gtkalias.h"
  46
  47 #define MIN_SPIN_BUTTON_WIDTH 30
  48 #define MAX_TIMER_CALLS       5
  49 #define EPSILON               1e-10
  50 #define MAX_DIGITS            20
  51 #define MIN_ARROW_WIDTH       6
  52
  53 enum {
  54   PROP_0,
  55   PROP_ADJUSTMENT,
  56   PROP_CLIMB_RATE,
  57   PROP_DIGITS,
  58   PROP_SNAP_TO_TICKS,
  59   PROP_NUMERIC,
  60   PROP_WRAP,
  61   PROP_UPDATE_POLICY,
  62   PROP_VALUE
  63 };
  64
  65 /* Signals */
  66 enum
  67 {
  68   INPUT,
  69   OUTPUT,
  70   VALUE_CHANGED,
  71   CHANGE_VALUE,
  72   WRAPPED,
  73   LAST_SIGNAL
  74 };
  75
  76 static void gtk_spin_button_editable_init  (GtkEditableClass   *iface);
  77 static void gtk_spin_button_finalize       (GObject            *object);
  78 static void gtk_spin_button_destroy        (GtkObject          *object);
  79 static void gtk_spin_button_set_property   (GObject         *object,
  80                                             guint            prop_id,
  81                                             const GValue    *value,
  82                                             GParamSpec      *pspec);
  83 static void gtk_spin_button_get_property   (GObject         *object,
  84                                             guint            prop_id,
  85                                             GValue          *value,
  86                                             GParamSpec      *pspec);
  87 static void gtk_spin_button_map            (GtkWidget          *widget);
  88 static void gtk_spin_button_unmap          (GtkWidget          *widget);
  89 static void gtk_spin_button_realize        (GtkWidget          *widget);
  90 static void gtk_spin_button_unrealize      (GtkWidget          *widget);
  91 static void gtk_spin_button_size_request   (GtkWidget          *widget,
  92                                             GtkRequisition     *requisition);
  93 static void gtk_spin_button_size_allocate  (GtkWidget          *widget,
  94                                             GtkAllocation      *allocation);
  95 static gint gtk_spin_button_expose         (GtkWidget          *widget,
  96                                             GdkEventExpose     *event);
  97 static gint gtk_spin_button_button_press   (GtkWidget          *widget,
  98                                             GdkEventButton     *event);
  99 static gint gtk_spin_button_button_release (GtkWidget          *widget,
 100                                             GdkEventButton     *event);
 101 static gint gtk_spin_button_motion_notify  (GtkWidget          *widget,
 102                                             GdkEventMotion     *event);
 103 static gint gtk_spin_button_enter_notify   (GtkWidget          *widget,
 104                                             GdkEventCrossing   *event);
 105 static gint gtk_spin_button_leave_notify   (GtkWidget          *widget,
 106                                             GdkEventCrossing   *event);
 107 static gint gtk_spin_button_focus_out      (GtkWidget          *widget,
 108                                             GdkEventFocus      *event);
 109 static void gtk_spin_button_grab_notify    (GtkWidget          *widget,
 110                                             gboolean            was_grabbed);
 111 static void gtk_spin_button_state_changed  (GtkWidget          *widget,
 112                                             GtkStateType        previous_state);
 113 static void gtk_spin_button_style_set      (GtkWidget          *widget,
 114                                             GtkStyle           *previous_style);
 115 static void gtk_spin_button_draw_arrow     (GtkSpinButton      *spin_button,
 116                                             GdkRectangle       *area,
 117                                             GtkArrowType        arrow_type);
 118 static gboolean gtk_spin_button_timer          (GtkSpinButton      *spin_button);
 119 static void gtk_spin_button_stop_spinning  (GtkSpinButton      *spin);
 120 static void gtk_spin_button_value_changed  (GtkAdjustment      *adjustment,
 121                                             GtkSpinButton      *spin_button);
 122 static gint gtk_spin_button_key_release    (GtkWidget          *widget,
 123                                             GdkEventKey        *event);
 124 static gint gtk_spin_button_scroll         (GtkWidget          *widget,
 125                                             GdkEventScroll     *event);
 126 static void gtk_spin_button_activate       (GtkEntry           *entry);
 127 static void gtk_spin_button_get_text_area_size (GtkEntry *entry,
 128                                                 gint     *x,
 129                                                 gint     *y,
 130                                                 gint     *width,
 131                                                 gint     *height);
 132 static void gtk_spin_button_snap           (GtkSpinButton      *spin_button,
 133                                             gdouble             val);
 134 static void gtk_spin_button_insert_text    (GtkEditable        *editable,
 135                                             const gchar        *new_text,
 136                                             gint                new_text_length,
 137                                             gint               *position);
 138 static void gtk_spin_button_real_spin      (GtkSpinButton      *spin_button,
 139                                             gdouble             step);
 140 static void gtk_spin_button_real_change_value (GtkSpinButton   *spin,
 141                                                GtkScrollType    scroll);
 142
 143 static gint gtk_spin_button_default_input  (GtkSpinButton      *spin_button,
 144                                             gdouble            *new_val);
 145 static gint gtk_spin_button_default_output (GtkSpinButton      *spin_button);
 146
 147 static gint spin_button_get_arrow_size     (GtkSpinButton      *spin_button);
 148 static gint spin_button_get_shadow_type    (GtkSpinButton      *spin_button);
 149
 150 static guint spinbutton_signals[LAST_SIGNAL] = {0};
 151
 152 #define NO_ARROW 2
 153
 154 G_DEFINE_TYPE_WITH_CODE (GtkSpinButton, gtk_spin_button, GTK_TYPE_ENTRY,
 155                          G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
 156                                                 gtk_spin_button_editable_init))
 157
 158 #define add_spin_binding(binding_set, keyval, mask, scroll)            \
 159   gtk_binding_entry_add_signal (binding_set, keyval, mask,             \
 160                                 "change_value", 1,                     \
 161                                 GTK_TYPE_SCROLL_TYPE, scroll)
 162
 163 static void
 164 gtk_spin_button_class_init (GtkSpinButtonClass *class)
 165 {
 166   GObjectClass     *gobject_class = G_OBJECT_CLASS (class);
 167   GtkObjectClass   *object_class = GTK_OBJECT_CLASS (class);
 168   GtkWidgetClass   *widget_class = GTK_WIDGET_CLASS (class);
 169   GtkEntryClass    *entry_class = GTK_ENTRY_CLASS (class);
 170   GtkBindingSet    *binding_set;
 171
 172   gobject_class->finalize = gtk_spin_button_finalize;
 173
 174   gobject_class->set_property = gtk_spin_button_set_property;
 175   gobject_class->get_property = gtk_spin_button_get_property;
 176
 177   object_class->destroy = gtk_spin_button_destroy;
 178
 179   widget_class->map = gtk_spin_button_map;
 180   widget_class->unmap = gtk_spin_button_unmap;
 181   widget_class->realize = gtk_spin_button_realize;
 182   widget_class->unrealize = gtk_spin_button_unrealize;
 183   widget_class->size_request = gtk_spin_button_size_request;
 184   widget_class->size_allocate = gtk_spin_button_size_allocate;
 185   widget_class->expose_event = gtk_spin_button_expose;
 186   widget_class->scroll_event = gtk_spin_button_scroll;
 187   widget_class->button_press_event = gtk_spin_button_button_press;
 188   widget_class->button_release_event = gtk_spin_button_button_release;
 189   widget_class->motion_notify_event = gtk_spin_button_motion_notify;
 190   widget_class->key_release_event = gtk_spin_button_key_release;
 191   widget_class->enter_notify_event = gtk_spin_button_enter_notify;
 192   widget_class->leave_notify_event = gtk_spin_button_leave_notify;
 193   widget_class->focus_out_event = gtk_spin_button_focus_out;
 194   widget_class->grab_notify = gtk_spin_button_grab_notify;
 195   widget_class->state_changed = gtk_spin_button_state_changed;
 196   widget_class->style_set = gtk_spin_button_style_set;
 197
 198   entry_class->activate = gtk_spin_button_activate;
 199   entry_class->get_text_area_size = gtk_spin_button_get_text_area_size;
 200
 201   class->input = NULL;
 202   class->output = NULL;
 203   class->change_value = gtk_spin_button_real_change_value;
 204
 205   g_object_class_install_property (gobject_class,
 206                                    PROP_ADJUSTMENT,
 207                                    g_param_spec_object ("adjustment",
 208                                                         P_("Adjustment"),
 209                                                         P_("The adjustment that holds the value of the spinbutton"),
 210                                                         GTK_TYPE_ADJUSTMENT,
 211                                                         GTK_PARAM_READWRITE));
 212
 213   g_object_class_install_property (gobject_class,
 214                                    PROP_CLIMB_RATE,
 215                                    g_param_spec_double ("climb-rate",
 216                                                         P_("Climb Rate"),
 217                                                         P_("The acceleration rate when you hold down a button"),
 218                                                         0.0,
 219                                                         G_MAXDOUBLE,
 220                                                         0.0,
 221                                                         GTK_PARAM_READWRITE));
 222
 223   g_object_class_install_property (gobject_class,
 224                                    PROP_DIGITS,
 225                                    g_param_spec_uint ("digits",
 226                                                       P_("Digits"),
 227                                                       P_("The number of decimal places to display"),
 228                                                       0,
 229                                                       MAX_DIGITS,
 230                                                       0,
 231                                                       GTK_PARAM_READWRITE));
 232
 233   g_object_class_install_property (gobject_class,
 234                                    PROP_SNAP_TO_TICKS,
 235                                    g_param_spec_boolean ("snap-to-ticks",
 236                                                          P_("Snap to Ticks"),
 237                                                          P_("Whether erroneous values are automatically changed to a spin button's nearest step increment"),
 238                                                          FALSE,
 239                                                          GTK_PARAM_READWRITE));
 240
 241   g_object_class_install_property (gobject_class,
 242                                    PROP_NUMERIC,
 243                                    g_param_spec_boolean ("numeric",
 244                                                          P_("Numeric"),
 245                                                          P_("Whether non-numeric characters should be ignored"),
 246                                                          FALSE,
 247                                                          GTK_PARAM_READWRITE));
 248
 249   g_object_class_install_property (gobject_class,
 250                                    PROP_WRAP,
 251                                    g_param_spec_boolean ("wrap",
 252                                                          P_("Wrap"),
 253                                                          P_("Whether a spin button should wrap upon reaching its limits"),
 254                                                          FALSE,
 255                                                          GTK_PARAM_READWRITE));
 256
 257   g_object_class_install_property (gobject_class,
 258                                    PROP_UPDATE_POLICY,
 259                                    g_param_spec_enum ("update-policy",
 260                                                       P_("Update Policy"),
 261                                                       P_("Whether the spin button should update always, or only when the value is legal"),
 262                                                       GTK_TYPE_SPIN_BUTTON_UPDATE_POLICY,
 263                                                       GTK_UPDATE_ALWAYS,
 264                                                       GTK_PARAM_READWRITE));
 265
 266   g_object_class_install_property (gobject_class,
 267                                    PROP_VALUE,
 268                                    g_param_spec_double ("value",
 269                                                         P_("Value"),
 270                                                         P_("Reads the current value, or sets a new value"),
 271                                                         -G_MAXDOUBLE,
 272                                                         G_MAXDOUBLE,
 273                                                         0.0,
 274                                                         GTK_PARAM_READWRITE));
 275
 276   gtk_widget_class_install_style_property_parser (widget_class,
 277                                                   g_param_spec_enum ("shadow-type",
 278                                                                      "Shadow Type",
 279                                                                      P_("Style of bevel around the spin button"),
 280                                                                      GTK_TYPE_SHADOW_TYPE,
 281                                                                      GTK_SHADOW_IN,
 282                                                                      GTK_PARAM_READABLE),
 283                                                   gtk_rc_property_parse_enum);
 284   spinbutton_signals[INPUT] =
 285     g_signal_new (I_("input"),
 286                   G_TYPE_FROM_CLASS (gobject_class),
 287                   G_SIGNAL_RUN_LAST,
 288                   G_STRUCT_OFFSET (GtkSpinButtonClass, input),
 289                   NULL, NULL,
 290                   _gtk_marshal_INT__POINTER,
 291                   G_TYPE_INT, 1,
 292                   G_TYPE_POINTER);
 293
 294   /**
 295    * GtkSpinButton::output:
 296    * @spin_button: the object which received the signal
 297    *
 298    * The ::output signal can be used to change to formatting
 299    * of the value that is displayed in the spin buttons entry.
 300    * |[
 301    * /&ast; show leading zeros &ast;/
 302    * static gboolean
 303    * on_output (GtkSpinButton *spin,
 304    *            gpointer       data)
 305    * {
 306    *    GtkAdjustment *adj;
 307    *    gchar *text;
 308    *    int value;
 309    *
 310    *    adj = gtk_spin_button_get_adjustment (spin);
 311    *    value = (int)gtk_adjustment_get_value (adj);
 312    *    text = g_strdup_printf ("%02d", value);
 313    *    gtk_entry_set_text (GTK_ENTRY (spin), text);
 314    *    g_free (text);
 315    *
 316    *    return TRUE;
 317    * }
 318    * ]|
 319    *
 320    * Returns: %TRUE if the value has been displayed.
 321    */
 322   spinbutton_signals[OUTPUT] =
 323     g_signal_new (I_("output"),
 324                   G_TYPE_FROM_CLASS (gobject_class),
 325                   G_SIGNAL_RUN_LAST,
 326                   G_STRUCT_OFFSET (GtkSpinButtonClass, output),
 327                   _gtk_boolean_handled_accumulator, NULL,
 328                   _gtk_marshal_BOOLEAN__VOID,
 329                   G_TYPE_BOOLEAN, 0);
 330
 331   spinbutton_signals[VALUE_CHANGED] =
 332     g_signal_new (I_("value-changed"),
 333                   G_TYPE_FROM_CLASS (gobject_class),
 334                   G_SIGNAL_RUN_LAST,
 335                   G_STRUCT_OFFSET (GtkSpinButtonClass, value_changed),
 336                   NULL, NULL,
 337                   _gtk_marshal_VOID__VOID,
 338                   G_TYPE_NONE, 0);
 339
 340   /**
 341    * GtkSpinButton::wrapped:
 342    * @spinbutton: the object which received the signal
 343    *
 344    * The wrapped signal is emitted right after the spinbutton wraps
 345    * from its maximum to minimum value or vice-versa.
 346    *
 347    * Since: 2.10
 348    */
 349   spinbutton_signals[WRAPPED] =
 350     g_signal_new (I_("wrapped"),
 351                   G_TYPE_FROM_CLASS (gobject_class),
 352                   G_SIGNAL_RUN_LAST,
 353                   G_STRUCT_OFFSET (GtkSpinButtonClass, wrapped),
 354                   NULL, NULL,
 355                   _gtk_marshal_VOID__VOID,
 356                   G_TYPE_NONE, 0);
 357
 358   /* Action signals */
 359   spinbutton_signals[CHANGE_VALUE] =
 360     g_signal_new (I_("change-value"),
 361                   G_TYPE_FROM_CLASS (gobject_class),
 362                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 363                   G_STRUCT_OFFSET (GtkSpinButtonClass, change_value),
 364                   NULL, NULL,
 365                   _gtk_marshal_VOID__ENUM,
 366                   G_TYPE_NONE, 1,
 367                   GTK_TYPE_SCROLL_TYPE);
 368
 369   binding_set = gtk_binding_set_by_class (class);
 370
 371   add_spin_binding (binding_set, GDK_Up, 0, GTK_SCROLL_STEP_UP);
 372   add_spin_binding (binding_set, GDK_KP_Up, 0, GTK_SCROLL_STEP_UP);
 373   add_spin_binding (binding_set, GDK_Down, 0, GTK_SCROLL_STEP_DOWN);
 374   add_spin_binding (binding_set, GDK_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 375   add_spin_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 376   add_spin_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_DOWN);
 377   add_spin_binding (binding_set, GDK_Page_Up, GDK_CONTROL_MASK, GTK_SCROLL_END);
 378   add_spin_binding (binding_set, GDK_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_START);
 379 }
 380
 381 static void
 382 gtk_spin_button_editable_init (GtkEditableClass *iface)
 383 {
 384   iface->insert_text = gtk_spin_button_insert_text;
 385 }
 386
 387 static void
 388 gtk_spin_button_set_property (GObject      *object,
 389                               guint         prop_id,
 390                               const GValue *value,
 391                               GParamSpec   *pspec)
 392 {
 393   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (object);
 394
 395   switch (prop_id)
 396     {
 397       GtkAdjustment *adjustment;
 398
 399     case PROP_ADJUSTMENT:
 400       adjustment = GTK_ADJUSTMENT (g_value_get_object (value));
 401       if (!adjustment)
 402         adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 403       gtk_spin_button_set_adjustment (spin_button, adjustment);
 404       break;
 405     case PROP_CLIMB_RATE:
 406       gtk_spin_button_configure (spin_button,
 407                                  spin_button->adjustment,
 408                                  g_value_get_double (value),
 409                                  spin_button->digits);
 410       break;
 411     case PROP_DIGITS:
 412       gtk_spin_button_configure (spin_button,
 413                                  spin_button->adjustment,
 414                                  spin_button->climb_rate,
 415                                  g_value_get_uint (value));
 416       break;
 417     case PROP_SNAP_TO_TICKS:
 418       gtk_spin_button_set_snap_to_ticks (spin_button, g_value_get_boolean (value));
 419       break;
 420     case PROP_NUMERIC:
 421       gtk_spin_button_set_numeric (spin_button, g_value_get_boolean (value));
 422       break;
 423     case PROP_WRAP:
 424       gtk_spin_button_set_wrap (spin_button, g_value_get_boolean (value));
 425       break;
 426     case PROP_UPDATE_POLICY:
 427       gtk_spin_button_set_update_policy (spin_button, g_value_get_enum (value));
 428       break;
 429     case PROP_VALUE:
 430       gtk_spin_button_set_value (spin_button, g_value_get_double (value));
 431       break;
 432     default:
 433       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 434       break;
 435     }
 436 }
 437
 438 static void
 439 gtk_spin_button_get_property (GObject      *object,
 440                               guint         prop_id,
 441                               GValue       *value,
 442                               GParamSpec   *pspec)
 443 {
 444   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (object);
 445
 446   switch (prop_id)
 447     {
 448     case PROP_ADJUSTMENT:
 449       g_value_set_object (value, spin_button->adjustment);
 450       break;
 451     case PROP_CLIMB_RATE:
 452       g_value_set_double (value, spin_button->climb_rate);
 453       break;
 454     case PROP_DIGITS:
 455       g_value_set_uint (value, spin_button->digits);
 456       break;
 457     case PROP_SNAP_TO_TICKS:
 458       g_value_set_boolean (value, spin_button->snap_to_ticks);
 459       break;
 460     case PROP_NUMERIC:
 461       g_value_set_boolean (value, spin_button->numeric);
 462       break;
 463     case PROP_WRAP:
 464       g_value_set_boolean (value, spin_button->wrap);
 465       break;
 466     case PROP_UPDATE_POLICY:
 467       g_value_set_enum (value, spin_button->update_policy);
 468       break;
 469      case PROP_VALUE:
 470        g_value_set_double (value, spin_button->adjustment->value);
 471       break;
 472     default:
 473       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 474       break;
 475     }
 476 }
 477
 478 static void
 479 gtk_spin_button_init (GtkSpinButton *spin_button)
 480 {
 481   spin_button->adjustment = NULL;
 482   spin_button->panel = NULL;
 483   spin_button->timer = 0;
 484   spin_button->climb_rate = 0.0;
 485   spin_button->timer_step = 0.0;
 486   spin_button->update_policy = GTK_UPDATE_ALWAYS;
 487   spin_button->in_child = NO_ARROW;
 488   spin_button->click_child = NO_ARROW;
 489   spin_button->button = 0;
 490   spin_button->need_timer = FALSE;
 491   spin_button->timer_calls = 0;
 492   spin_button->digits = 0;
 493   spin_button->numeric = FALSE;
 494   spin_button->wrap = FALSE;
 495   spin_button->snap_to_ticks = FALSE;
 496
 497   gtk_spin_button_set_adjustment (spin_button,
 498           (GtkAdjustment*) gtk_adjustment_new (0, 0, 0, 0, 0, 0));
 499 }
 500
 501 static void
 502 gtk_spin_button_finalize (GObject *object)
 503 {
 504   gtk_spin_button_set_adjustment (GTK_SPIN_BUTTON (object), NULL);
 505
 506   G_OBJECT_CLASS (gtk_spin_button_parent_class)->finalize (object);
 507 }
 508
 509 static void
 510 gtk_spin_button_destroy (GtkObject *object)
 511 {
 512   gtk_spin_button_stop_spinning (GTK_SPIN_BUTTON (object));
 513
 514   GTK_OBJECT_CLASS (gtk_spin_button_parent_class)->destroy (object);
 515 }
 516
 517 static void
 518 gtk_spin_button_map (GtkWidget *widget)
 519 {
 520   if (gtk_widget_get_realized (widget) && !gtk_widget_get_mapped (widget))
 521     {
 522       GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->map (widget);
 523       gdk_window_show (GTK_SPIN_BUTTON (widget)->panel);
 524     }
 525 }
 526
 527 static void
 528 gtk_spin_button_unmap (GtkWidget *widget)
 529 {
 530   if (gtk_widget_get_mapped (widget))
 531     {
 532       gtk_spin_button_stop_spinning (GTK_SPIN_BUTTON (widget));
 533
 534       gdk_window_hide (GTK_SPIN_BUTTON (widget)->panel);
 535       GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->unmap (widget);
 536     }
 537 }
 538
 539 static void
 540 gtk_spin_button_realize (GtkWidget *widget)
 541 {
 542   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
 543   GdkWindowAttr attributes;
 544   gint attributes_mask;
 545   gboolean return_val;
 546   gint arrow_size;
 547
 548   arrow_size = spin_button_get_arrow_size (spin_button);
 549
 550   gtk_widget_set_events (widget, gtk_widget_get_events (widget) |
 551                          GDK_KEY_RELEASE_MASK);
 552   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->realize (widget);
 553
 554   attributes.window_type = GDK_WINDOW_CHILD;
 555   attributes.wclass = GDK_INPUT_OUTPUT;
 556   attributes.visual = gtk_widget_get_visual (widget);
 557   attributes.colormap = gtk_widget_get_colormap (widget);
 558   attributes.event_mask = gtk_widget_get_events (widget);
 559   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK
 560     | GDK_BUTTON_RELEASE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_ENTER_NOTIFY_MASK
 561     | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK;
 562
 563   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 564
 565   attributes.x = (widget->allocation.width - arrow_size -
 566                   2 * widget->style->xthickness);
 567   attributes.y = (widget->allocation.height -
 568                                          widget->requisition.height) / 2;
 569   attributes.width = arrow_size + 2 * widget->style->xthickness;
 570   attributes.height = widget->requisition.height;
 571
 572   spin_button->panel = gdk_window_new (widget->window,
 573                                        &attributes, attributes_mask);
 574   gdk_window_set_user_data (spin_button->panel, widget);
 575
 576   gtk_style_set_background (widget->style, spin_button->panel, GTK_STATE_NORMAL);
 577
 578   return_val = FALSE;
 579   g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
 580   if (return_val == FALSE)
 581     gtk_spin_button_default_output (spin_button);
 582
 583   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
 584 }
 585
 586 static void
 587 gtk_spin_button_unrealize (GtkWidget *widget)
 588 {
 589   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 590
 591   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->unrealize (widget);
 592
 593   if (spin->panel)
 594     {
 595       gdk_window_set_user_data (spin->panel, NULL);
 596       gdk_window_destroy (spin->panel);
 597       spin->panel = NULL;
 598     }
 599 }
 600
 601 static int
 602 compute_double_length (double val, int digits)
 603 {
 604   int a;
 605   int extra;
 606
 607   a = 1;
 608   if (fabs (val) > 1.0)
 609     a = floor (log10 (fabs (val))) + 1;
 610
 611   extra = 0;
 612
 613   /* The dot: */
 614   if (digits > 0)
 615     extra++;
 616
 617   /* The sign: */
 618   if (val < 0)
 619     extra++;
 620
 621   return a + digits + extra;
 622 }
 623
 624 static void
 625 gtk_spin_button_size_request (GtkWidget      *widget,
 626                               GtkRequisition *requisition)
 627 {
 628   GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
 629   GtkEntry *entry = GTK_ENTRY (widget);
 630   gint arrow_size;
 631
 632   arrow_size = spin_button_get_arrow_size (spin_button);
 633
 634   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->size_request (widget, requisition);
 635
 636   if (entry->width_chars < 0)
 637     {
 638       PangoContext *context;
 639       PangoFontMetrics *metrics;
 640       gint width;
 641       gint w;
 642       gint string_len;
 643       gint max_string_len;
 644       gint digit_width;
 645       gboolean interior_focus;
 646       gint focus_width;
 647       gint xborder, yborder;
 648       GtkBorder inner_border;
 649
 650       gtk_widget_style_get (widget,
 651                             "interior-focus", &interior_focus,
 652                             "focus-line-width", &focus_width,
 653                             NULL);
 654
 655       context = gtk_widget_get_pango_context (widget);
 656       metrics = pango_context_get_metrics (context,
 657                                            widget->style->font_desc,
 658                                            pango_context_get_language (context));
 659
 660       digit_width = pango_font_metrics_get_approximate_digit_width (metrics);
 661       digit_width = PANGO_SCALE *
 662         ((digit_width + PANGO_SCALE - 1) / PANGO_SCALE);
 663
 664       pango_font_metrics_unref (metrics);
 665
 666       /* Get max of MIN_SPIN_BUTTON_WIDTH, size of upper, size of lower */
 667
 668       width = MIN_SPIN_BUTTON_WIDTH;
 669       max_string_len = MAX (10, compute_double_length (1e9 * spin_button->adjustment->step_increment,
 670                                                        spin_button->digits));
 671
 672       string_len = compute_double_length (spin_button->adjustment->upper,
 673                                           spin_button->digits);
 674       w = PANGO_PIXELS (MIN (string_len, max_string_len) * digit_width);
 675       width = MAX (width, w);
 676       string_len = compute_double_length (spin_button->adjustment->lower,
 677                                           spin_button->digits);
 678       w = PANGO_PIXELS (MIN (string_len, max_string_len) * digit_width);
 679       width = MAX (width, w);
 680
 681       _gtk_entry_get_borders (entry, &xborder, &yborder);
 682       _gtk_entry_effective_inner_border (entry, &inner_border);
 683
 684       requisition->width = width + xborder * 2 + inner_border.left + inner_border.right;
 685     }
 686
 687   requisition->width += arrow_size + 2 * widget->style->xthickness;
 688 }
 689
 690 static void
 691 gtk_spin_button_size_allocate (GtkWidget     *widget,
 692                                GtkAllocation *allocation)
 693 {
 694   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 695   GtkAllocation panel_allocation;
 696   gint arrow_size;
 697   gint panel_width;
 698
 699   arrow_size = spin_button_get_arrow_size (spin);
 700   panel_width = arrow_size + 2 * widget->style->xthickness;
 701
 702   widget->allocation = *allocation;
 703
 704   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 705     panel_allocation.x = 0;
 706   else
 707     panel_allocation.x = allocation->width - panel_width;
 708
 709   panel_allocation.width = panel_width;
 710   panel_allocation.height = MIN (widget->requisition.height, allocation->height);
 711
 712   panel_allocation.y = 0;
 713
 714   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->size_allocate (widget, allocation);
 715
 716   if (gtk_widget_get_realized (widget))
 717     {
 718       gdk_window_move_resize (GTK_SPIN_BUTTON (widget)->panel,
 719                               panel_allocation.x,
 720                               panel_allocation.y,
 721                               panel_allocation.width,
 722                               panel_allocation.height);
 723     }
 724
 725   gtk_widget_queue_draw (GTK_WIDGET (spin));
 726 }
 727
 728 static gint
 729 gtk_spin_button_expose (GtkWidget      *widget,
 730                         GdkEventExpose *event)
 731 {
 732   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 733
 734   if (gtk_widget_is_drawable (widget))
 735     {
 736       if (event->window == spin->panel)
 737         {
 738           GtkShadowType shadow_type;
 739
 740           shadow_type = spin_button_get_shadow_type (spin);
 741
 742           if (shadow_type != GTK_SHADOW_NONE)
 743             {
 744               gint width, height;
 745
 746               gdk_drawable_get_size (spin->panel, &width, &height);
 747
 748               gtk_paint_box (widget->style, spin->panel,
 749                              GTK_STATE_NORMAL, shadow_type,
 750                              &event->area, widget, "spinbutton",
 751                              0, 0, width, height);
 752             }
 753
 754           gtk_spin_button_draw_arrow (spin, &event->area, GTK_ARROW_UP);
 755           gtk_spin_button_draw_arrow (spin, &event->area, GTK_ARROW_DOWN);
 756         }
 757       else
 758         GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->expose_event (widget, event);
 759     }
 760
 761   return FALSE;
 762 }
 763
 764 static gboolean
 765 spin_button_at_limit (GtkSpinButton *spin_button,
 766                      GtkArrowType   arrow)
 767 {
 768   GtkArrowType effective_arrow;
 769
 770   if (spin_button->wrap)
 771     return FALSE;
 772
 773   if (spin_button->adjustment->step_increment > 0)
 774     effective_arrow = arrow;
 775   else
 776     effective_arrow = arrow == GTK_ARROW_UP ? GTK_ARROW_DOWN : GTK_ARROW_UP;
 777
 778   if (effective_arrow == GTK_ARROW_UP &&
 779       (spin_button->adjustment->upper - spin_button->adjustment->value <= EPSILON))
 780     return TRUE;
 781
 782   if (effective_arrow == GTK_ARROW_DOWN &&
 783       (spin_button->adjustment->value - spin_button->adjustment->lower <= EPSILON))
 784     return TRUE;
 785
 786   return FALSE;
 787 }
 788
 789 static void
 790 gtk_spin_button_draw_arrow (GtkSpinButton *spin_button,
 791                             GdkRectangle  *area,
 792                             GtkArrowType   arrow_type)
 793 {
 794   GtkStateType state_type;
 795   GtkShadowType shadow_type;
 796   GtkWidget *widget;
 797   gint x;
 798   gint y;
 799   gint height;
 800   gint width;
 801   gint h, w;
 802
 803   g_return_if_fail (arrow_type == GTK_ARROW_UP || arrow_type == GTK_ARROW_DOWN);
 804
 805   widget = GTK_WIDGET (spin_button);
 806
 807   if (gtk_widget_is_drawable (widget))
 808     {
 809       width = spin_button_get_arrow_size (spin_button) + 2 * widget->style->xthickness;
 810
 811       if (arrow_type == GTK_ARROW_UP)
 812         {
 813           x = 0;
 814           y = 0;
 815
 816           height = widget->requisition.height / 2;
 817         }
 818       else
 819         {
 820           x = 0;
 821           y = widget->requisition.height / 2;
 822
 823           height = (widget->requisition.height + 1) / 2;
 824         }
 825
 826       if (spin_button_at_limit (spin_button, arrow_type))
 827         {
 828           shadow_type = GTK_SHADOW_OUT;
 829           state_type = GTK_STATE_INSENSITIVE;
 830         }
 831       else
 832         {
 833           if (spin_button->click_child == arrow_type)
 834             {
 835               state_type = GTK_STATE_ACTIVE;
 836               shadow_type = GTK_SHADOW_IN;
 837             }
 838           else
 839             {
 840               if (spin_button->in_child == arrow_type &&
 841                   spin_button->click_child == NO_ARROW)
 842                 {
 843                   state_type = GTK_STATE_PRELIGHT;
 844                 }
 845               else
 846                 {
 847                   state_type = gtk_widget_get_state (widget);
 848                 }
 849
 850               shadow_type = GTK_SHADOW_OUT;
 851             }
 852         }
 853
 854       gtk_paint_box (widget->style, spin_button->panel,
 855                      state_type, shadow_type,
 856                      area, widget,
 857                      (arrow_type == GTK_ARROW_UP)? "spinbutton_up" : "spinbutton_down",
 858                      x, y, width, height);
 859
 860       height = widget->requisition.height;
 861
 862       if (arrow_type == GTK_ARROW_DOWN)
 863         {
 864           y = height / 2;
 865           height = height - y - 2;
 866         }
 867       else
 868         {
 869           y = 2;
 870           height = height / 2 - 2;
 871         }
 872
 873       width -= 3;
 874
 875       if (widget && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
 876         x = 2;
 877       else
 878         x = 1;
 879
 880       w = width / 2;
 881       w -= w % 2 - 1; /* force odd */
 882       h = (w + 1) / 2;
 883
 884       x += (width - w) / 2;
 885       y += (height - h) / 2;
 886
 887       height = h;
 888       width = w;
 889
 890       gtk_paint_arrow (widget->style, spin_button->panel,
 891                        state_type, shadow_type,
 892                        area, widget, "spinbutton",
 893                        arrow_type, TRUE,
 894                        x, y, width, height);
 895     }
 896 }
 897
 898 static gint
 899 gtk_spin_button_enter_notify (GtkWidget        *widget,
 900                               GdkEventCrossing *event)
 901 {
 902   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 903
 904   if (event->window == spin->panel)
 905     {
 906       GdkDevice *device;
 907       gint x;
 908       gint y;
 909
 910       device = gdk_event_get_device ((GdkEvent *) event);
 911       gdk_window_get_device_position (spin->panel, device, &x, &y, NULL);
 912
 913       if (y <= widget->requisition.height / 2)
 914         spin->in_child = GTK_ARROW_UP;
 915       else
 916         spin->in_child = GTK_ARROW_DOWN;
 917
 918       gtk_widget_queue_draw (GTK_WIDGET (spin));
 919     }
 920
 921   if (GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->enter_notify_event)
 922     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->enter_notify_event (widget, event);
 923
 924   return FALSE;
 925 }
 926
 927 static gint
 928 gtk_spin_button_leave_notify (GtkWidget        *widget,
 929                               GdkEventCrossing *event)
 930 {
 931   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 932
 933   spin->in_child = NO_ARROW;
 934   gtk_widget_queue_draw (GTK_WIDGET (spin));
 935
 936   if (GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->leave_notify_event)
 937     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->leave_notify_event (widget, event);
 938
 939   return FALSE;
 940 }
 941
 942 static gint
 943 gtk_spin_button_focus_out (GtkWidget     *widget,
 944                            GdkEventFocus *event)
 945 {
 946   if (GTK_ENTRY (widget)->editable)
 947     gtk_spin_button_update (GTK_SPIN_BUTTON (widget));
 948
 949   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->focus_out_event (widget, event);
 950 }
 951
 952 static void
 953 gtk_spin_button_grab_notify (GtkWidget *widget,
 954                              gboolean   was_grabbed)
 955 {
 956   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 957
 958   if (!was_grabbed)
 959     {
 960       gtk_spin_button_stop_spinning (spin);
 961       gtk_widget_queue_draw (GTK_WIDGET (spin));
 962     }
 963 }
 964
 965 static void
 966 gtk_spin_button_state_changed (GtkWidget    *widget,
 967                                GtkStateType  previous_state)
 968 {
 969   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 970
 971   if (!gtk_widget_is_sensitive (widget))
 972     {
 973       gtk_spin_button_stop_spinning (spin);
 974       gtk_widget_queue_draw (GTK_WIDGET (spin));
 975     }
 976 }
 977
 978 static void
 979 gtk_spin_button_style_set (GtkWidget *widget,
 980                            GtkStyle  *previous_style)
 981 {
 982   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 983
 984   if (previous_style && gtk_widget_get_realized (widget))
 985     gtk_style_set_background (widget->style, spin->panel, GTK_STATE_NORMAL);
 986
 987   GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->style_set (widget, previous_style);
 988 }
 989
 990
 991 static gint
 992 gtk_spin_button_scroll (GtkWidget      *widget,
 993                         GdkEventScroll *event)
 994 {
 995   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
 996
 997   if (event->direction == GDK_SCROLL_UP)
 998     {
 999       if (!gtk_widget_has_focus (widget))
1000         gtk_widget_grab_focus (widget);
1001       gtk_spin_button_real_spin (spin, spin->adjustment->step_increment);
1002     }
1003   else if (event->direction == GDK_SCROLL_DOWN)
1004     {
1005       if (!gtk_widget_has_focus (widget))
1006         gtk_widget_grab_focus (widget);
1007       gtk_spin_button_real_spin (spin, -spin->adjustment->step_increment);
1008     }
1009   else
1010     return FALSE;
1011
1012   return TRUE;
1013 }
1014
1015 static void
1016 gtk_spin_button_stop_spinning (GtkSpinButton *spin)
1017 {
1018   if (spin->timer)
1019     {
1020       g_source_remove (spin->timer);
1021       spin->timer = 0;
1022       spin->timer_calls = 0;
1023       spin->need_timer = FALSE;
1024     }
1025
1026   spin->button = 0;
1027   spin->timer = 0;
1028   spin->timer_step = spin->adjustment->step_increment;
1029   spin->timer_calls = 0;
1030
1031   spin->click_child = NO_ARROW;
1032   spin->button = 0;
1033 }
1034
1035 static void
1036 start_spinning (GtkSpinButton *spin,
1037                 GtkArrowType   click_child,
1038                 gdouble        step)
1039 {
1040   g_return_if_fail (click_child == GTK_ARROW_UP || click_child == GTK_ARROW_DOWN);
1041
1042   spin->click_child = click_child;
1043
1044   if (!spin->timer)
1045     {
1046       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (spin));
1047       guint        timeout;
1048
1049       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1050
1051       spin->timer_step = step;
1052       spin->need_timer = TRUE;
1053       spin->timer = gdk_threads_add_timeout (timeout,
1054                                    (GSourceFunc) gtk_spin_button_timer,
1055                                    (gpointer) spin);
1056     }
1057   gtk_spin_button_real_spin (spin, click_child == GTK_ARROW_UP ? step : -step);
1058
1059   gtk_widget_queue_draw (GTK_WIDGET (spin));
1060 }
1061
1062 static gint
1063 gtk_spin_button_button_press (GtkWidget      *widget,
1064                               GdkEventButton *event)
1065 {
1066   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1067
1068   if (!spin->button)
1069     {
1070       if (event->window == spin->panel)
1071         {
1072           if (!gtk_widget_has_focus (widget))
1073             gtk_widget_grab_focus (widget);
1074           spin->button = event->button;
1075
1076           if (GTK_ENTRY (widget)->editable)
1077             gtk_spin_button_update (spin);
1078
1079           if (event->y <= widget->requisition.height / 2)
1080             {
1081               if (event->button == 1)
1082                 start_spinning (spin, GTK_ARROW_UP, spin->adjustment->step_increment);
1083               else if (event->button == 2)
1084                 start_spinning (spin, GTK_ARROW_UP, spin->adjustment->page_increment);
1085               else
1086                 spin->click_child = GTK_ARROW_UP;
1087             }
1088           else
1089             {
1090               if (event->button == 1)
1091                 start_spinning (spin, GTK_ARROW_DOWN, spin->adjustment->step_increment);
1092               else if (event->button == 2)
1093                 start_spinning (spin, GTK_ARROW_DOWN, spin->adjustment->page_increment);
1094               else
1095                 spin->click_child = GTK_ARROW_DOWN;
1096             }
1097           return TRUE;
1098         }
1099       else
1100         return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->button_press_event (widget, event);
1101     }
1102   return FALSE;
1103 }
1104
1105 static gint
1106 gtk_spin_button_button_release (GtkWidget      *widget,
1107                                 GdkEventButton *event)
1108 {
1109   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1110   gint arrow_size;
1111
1112   arrow_size = spin_button_get_arrow_size (spin);
1113
1114   if (event->button == spin->button)
1115     {
1116       int click_child = spin->click_child;
1117
1118       gtk_spin_button_stop_spinning (spin);
1119
1120       if (event->button == 3)
1121         {
1122           if (event->y >= 0 && event->x >= 0 &&
1123               event->y <= widget->requisition.height &&
1124               event->x <= arrow_size + 2 * widget->style->xthickness)
1125             {
1126               if (click_child == GTK_ARROW_UP &&
1127                   event->y <= widget->requisition.height / 2)
1128                 {
1129                   gdouble diff;
1130
1131                   diff = spin->adjustment->upper - spin->adjustment->value;
1132                   if (diff > EPSILON)
1133                     gtk_spin_button_real_spin (spin, diff);
1134                 }
1135               else if (click_child == GTK_ARROW_DOWN &&
1136                        event->y > widget->requisition.height / 2)
1137                 {
1138                   gdouble diff;
1139
1140                   diff = spin->adjustment->value - spin->adjustment->lower;
1141                   if (diff > EPSILON)
1142                     gtk_spin_button_real_spin (spin, -diff);
1143                 }
1144             }
1145         }
1146       gtk_widget_queue_draw (GTK_WIDGET (spin));
1147
1148       return TRUE;
1149     }
1150   else
1151     return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->button_release_event (widget, event);
1152 }
1153
1154 static gint
1155 gtk_spin_button_motion_notify (GtkWidget      *widget,
1156                                GdkEventMotion *event)
1157 {
1158   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1159
1160   if (spin->button)
1161     return FALSE;
1162
1163   if (event->window == spin->panel)
1164     {
1165       gint y = event->y;
1166
1167       gdk_event_request_motions (event);
1168
1169       if (y <= widget->requisition.height / 2 &&
1170           spin->in_child == GTK_ARROW_DOWN)
1171         {
1172           spin->in_child = GTK_ARROW_UP;
1173           gtk_widget_queue_draw (GTK_WIDGET (spin));
1174         }
1175       else if (y > widget->requisition.height / 2 &&
1176           spin->in_child == GTK_ARROW_UP)
1177         {
1178           spin->in_child = GTK_ARROW_DOWN;
1179           gtk_widget_queue_draw (GTK_WIDGET (spin));
1180         }
1181
1182       return FALSE;
1183     }
1184
1185   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->motion_notify_event (widget, event);
1186 }
1187
1188 static gint
1189 gtk_spin_button_timer (GtkSpinButton *spin_button)
1190 {
1191   gboolean retval = FALSE;
1192
1193   if (spin_button->timer)
1194     {
1195       if (spin_button->click_child == GTK_ARROW_UP)
1196         gtk_spin_button_real_spin (spin_button, spin_button->timer_step);
1197       else
1198         gtk_spin_button_real_spin (spin_button, -spin_button->timer_step);
1199
1200       if (spin_button->need_timer)
1201         {
1202           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (spin_button));
1203           guint        timeout;
1204
1205           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
1206
1207           spin_button->need_timer = FALSE;
1208           spin_button->timer = gdk_threads_add_timeout (timeout,
1209                                               (GSourceFunc) gtk_spin_button_timer,
1210                                               (gpointer) spin_button);
1211         }
1212       else
1213         {
1214           if (spin_button->climb_rate > 0.0 && spin_button->timer_step
1215               < spin_button->adjustment->page_increment)
1216             {
1217               if (spin_button->timer_calls < MAX_TIMER_CALLS)
1218                 spin_button->timer_calls++;
1219               else
1220                 {
1221                   spin_button->timer_calls = 0;
1222                   spin_button->timer_step += spin_button->climb_rate;
1223                 }
1224             }
1225           retval = TRUE;
1226         }
1227     }
1228
1229   return retval;
1230 }
1231
1232 static void
1233 gtk_spin_button_value_changed (GtkAdjustment *adjustment,
1234                                GtkSpinButton *spin_button)
1235 {
1236   gboolean return_val;
1237
1238   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
1239
1240   return_val = FALSE;
1241   g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1242   if (return_val == FALSE)
1243     gtk_spin_button_default_output (spin_button);
1244
1245   g_signal_emit (spin_button, spinbutton_signals[VALUE_CHANGED], 0);
1246
1247   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1248
1249   g_object_notify (G_OBJECT (spin_button), "value");
1250 }
1251
1252 static void
1253 gtk_spin_button_real_change_value (GtkSpinButton *spin,
1254                                    GtkScrollType  scroll)
1255 {
1256   gdouble old_value;
1257
1258   /* When the key binding is activated, there may be an outstanding
1259    * value, so we first have to commit what is currently written in
1260    * the spin buttons text entry. See #106574
1261    */
1262   gtk_spin_button_update (spin);
1263
1264   old_value = spin->adjustment->value;
1265
1266   /* We don't test whether the entry is editable, since
1267    * this key binding conceptually corresponds to changing
1268    * the value with the buttons using the mouse, which
1269    * we allow for non-editable spin buttons.
1270    */
1271   switch (scroll)
1272     {
1273     case GTK_SCROLL_STEP_BACKWARD:
1274     case GTK_SCROLL_STEP_DOWN:
1275     case GTK_SCROLL_STEP_LEFT:
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_STEP_FORWARD:
1292     case GTK_SCROLL_STEP_UP:
1293     case GTK_SCROLL_STEP_RIGHT:
1294       gtk_spin_button_real_spin (spin, spin->timer_step);
1295
1296       if (spin->climb_rate > 0.0 && spin->timer_step
1297           < spin->adjustment->page_increment)
1298         {
1299           if (spin->timer_calls < MAX_TIMER_CALLS)
1300             spin->timer_calls++;
1301           else
1302             {
1303               spin->timer_calls = 0;
1304               spin->timer_step += spin->climb_rate;
1305             }
1306         }
1307       break;
1308
1309     case GTK_SCROLL_PAGE_BACKWARD:
1310     case GTK_SCROLL_PAGE_DOWN:
1311     case GTK_SCROLL_PAGE_LEFT:
1312       gtk_spin_button_real_spin (spin, -spin->adjustment->page_increment);
1313       break;
1314
1315     case GTK_SCROLL_PAGE_FORWARD:
1316     case GTK_SCROLL_PAGE_UP:
1317     case GTK_SCROLL_PAGE_RIGHT:
1318       gtk_spin_button_real_spin (spin, spin->adjustment->page_increment);
1319       break;
1320
1321     case GTK_SCROLL_START:
1322       {
1323         gdouble diff = spin->adjustment->value - spin->adjustment->lower;
1324         if (diff > EPSILON)
1325           gtk_spin_button_real_spin (spin, -diff);
1326         break;
1327       }
1328
1329     case GTK_SCROLL_END:
1330       {
1331         gdouble diff = spin->adjustment->upper - spin->adjustment->value;
1332         if (diff > EPSILON)
1333           gtk_spin_button_real_spin (spin, diff);
1334         break;
1335       }
1336
1337     default:
1338       g_warning ("Invalid scroll type %d for GtkSpinButton::change-value", scroll);
1339       break;
1340     }
1341
1342   gtk_spin_button_update (spin);
1343
1344   if (spin->adjustment->value == old_value)
1345     gtk_widget_error_bell (GTK_WIDGET (spin));
1346 }
1347
1348 static gint
1349 gtk_spin_button_key_release (GtkWidget   *widget,
1350                              GdkEventKey *event)
1351 {
1352   GtkSpinButton *spin = GTK_SPIN_BUTTON (widget);
1353
1354   /* We only get a release at the end of a key repeat run, so reset the timer_step */
1355   spin->timer_step = spin->adjustment->step_increment;
1356   spin->timer_calls = 0;
1357
1358   return TRUE;
1359 }
1360
1361 static void
1362 gtk_spin_button_snap (GtkSpinButton *spin_button,
1363                       gdouble        val)
1364 {
1365   gdouble inc;
1366   gdouble tmp;
1367
1368   inc = spin_button->adjustment->step_increment;
1369   if (inc == 0)
1370     return;
1371
1372   tmp = (val - spin_button->adjustment->lower) / inc;
1373   if (tmp - floor (tmp) < ceil (tmp) - tmp)
1374     val = spin_button->adjustment->lower + floor (tmp) * inc;
1375   else
1376     val = spin_button->adjustment->lower + ceil (tmp) * inc;
1377
1378   gtk_spin_button_set_value (spin_button, val);
1379 }
1380
1381 static void
1382 gtk_spin_button_activate (GtkEntry *entry)
1383 {
1384   if (entry->editable)
1385     gtk_spin_button_update (GTK_SPIN_BUTTON (entry));
1386
1387   /* Chain up so that entry->activates_default is honored */
1388   GTK_ENTRY_CLASS (gtk_spin_button_parent_class)->activate (entry);
1389 }
1390
1391 static void
1392 gtk_spin_button_get_text_area_size (GtkEntry *entry,
1393                                     gint     *x,
1394                                     gint     *y,
1395                                     gint     *width,
1396                                     gint     *height)
1397 {
1398   gint arrow_size;
1399   gint panel_width;
1400
1401   GTK_ENTRY_CLASS (gtk_spin_button_parent_class)->get_text_area_size (entry, x, y, width, height);
1402
1403   arrow_size = spin_button_get_arrow_size (GTK_SPIN_BUTTON (entry));
1404   panel_width = arrow_size + 2 * GTK_WIDGET (entry)->style->xthickness;
1405
1406   if (width)
1407     *width -= panel_width;
1408
1409   if (gtk_widget_get_direction (GTK_WIDGET (entry)) == GTK_TEXT_DIR_RTL && x)
1410     *x += panel_width;
1411 }
1412
1413 static void
1414 gtk_spin_button_insert_text (GtkEditable *editable,
1415                              const gchar *new_text,
1416                              gint         new_text_length,
1417                              gint        *position)
1418 {
1419   GtkEntry *entry = GTK_ENTRY (editable);
1420   GtkSpinButton *spin = GTK_SPIN_BUTTON (editable);
1421   GtkEditableClass *parent_editable_iface = g_type_interface_peek (gtk_spin_button_parent_class, GTK_TYPE_EDITABLE);
1422
1423   if (spin->numeric)
1424     {
1425       struct lconv *lc;
1426       gboolean sign;
1427       gint dotpos = -1;
1428       gint i;
1429       GdkWChar pos_sign;
1430       GdkWChar neg_sign;
1431       gint entry_length;
1432       const gchar *entry_text;
1433
1434       entry_length = gtk_entry_get_text_length (entry);
1435       entry_text = gtk_entry_get_text (entry);
1436
1437       lc = localeconv ();
1438
1439       if (*(lc->negative_sign))
1440         neg_sign = *(lc->negative_sign);
1441       else
1442         neg_sign = '-';
1443
1444       if (*(lc->positive_sign))
1445         pos_sign = *(lc->positive_sign);
1446       else
1447         pos_sign = '+';
1448
1449 #ifdef G_OS_WIN32
1450       /* Workaround for bug caused by some Windows application messing
1451        * up the positive sign of the current locale, more specifically
1452        * HKEY_CURRENT_USER\Control Panel\International\sPositiveSign.
1453        * See bug #330743 and for instance
1454        * http://www.msnewsgroups.net/group/microsoft.public.dotnet.languages.csharp/topic36024.aspx
1455        *
1456        * I don't know if the positive sign always gets bogusly set to
1457        * a digit when the above Registry value is corrupted as
1458        * described. (In my test case, it got set to "8", and in the
1459        * bug report above it presumably was set ot "0".) Probably it
1460        * might get set to almost anything? So how to distinguish a
1461        * bogus value from some correct one for some locale? That is
1462        * probably hard, but at least we should filter out the
1463        * digits...
1464        */
1465       if (pos_sign >= '0' && pos_sign <= '9')
1466         pos_sign = '+';
1467 #endif
1468
1469       for (sign=0, i=0; i<entry_length; i++)
1470         if ((entry_text[i] == neg_sign) ||
1471             (entry_text[i] == pos_sign))
1472           {
1473             sign = 1;
1474             break;
1475           }
1476
1477       if (sign && !(*position))
1478         return;
1479
1480       for (dotpos=-1, i=0; i<entry_length; i++)
1481         if (entry_text[i] == *(lc->decimal_point))
1482           {
1483             dotpos = i;
1484             break;
1485           }
1486
1487       if (dotpos > -1 && *position > dotpos &&
1488           (gint)spin->digits - entry_length
1489             + dotpos - new_text_length + 1 < 0)
1490         return;
1491
1492       for (i = 0; i < new_text_length; i++)
1493         {
1494           if (new_text[i] == neg_sign || new_text[i] == pos_sign)
1495             {
1496               if (sign || (*position) || i)
1497                 return;
1498               sign = TRUE;
1499             }
1500           else if (new_text[i] == *(lc->decimal_point))
1501             {
1502               if (!spin->digits || dotpos > -1 ||
1503                   (new_text_length - 1 - i + entry_length
1504                     - *position > (gint)spin->digits))
1505                 return;
1506               dotpos = *position + i;
1507             }
1508           else if (new_text[i] < 0x30 || new_text[i] > 0x39)
1509             return;
1510         }
1511     }
1512
1513   parent_editable_iface->insert_text (editable, new_text,
1514                                       new_text_length, position);
1515 }
1516
1517 static void
1518 gtk_spin_button_real_spin (GtkSpinButton *spin_button,
1519                            gdouble        increment)
1520 {
1521   GtkAdjustment *adj;
1522   gdouble new_value = 0.0;
1523   gboolean wrapped = FALSE;
1524
1525   adj = spin_button->adjustment;
1526
1527   new_value = adj->value + increment;
1528
1529   if (increment > 0)
1530     {
1531       if (spin_button->wrap)
1532         {
1533           if (fabs (adj->value - adj->upper) < EPSILON)
1534             {
1535               new_value = adj->lower;
1536               wrapped = TRUE;
1537             }
1538           else if (new_value > adj->upper)
1539             new_value = adj->upper;
1540         }
1541       else
1542         new_value = MIN (new_value, adj->upper);
1543     }
1544   else if (increment < 0)
1545     {
1546       if (spin_button->wrap)
1547         {
1548           if (fabs (adj->value - adj->lower) < EPSILON)
1549             {
1550               new_value = adj->upper;
1551               wrapped = TRUE;
1552             }
1553           else if (new_value < adj->lower)
1554             new_value = adj->lower;
1555         }
1556       else
1557         new_value = MAX (new_value, adj->lower);
1558     }
1559
1560   if (fabs (new_value - adj->value) > EPSILON)
1561     gtk_adjustment_set_value (adj, new_value);
1562
1563   if (wrapped)
1564     g_signal_emit (spin_button, spinbutton_signals[WRAPPED], 0);
1565
1566   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
1567 }
1568
1569 static gint
1570 gtk_spin_button_default_input (GtkSpinButton *spin_button,
1571                                gdouble       *new_val)
1572 {
1573   gchar *err = NULL;
1574
1575   *new_val = g_strtod (gtk_entry_get_text (GTK_ENTRY (spin_button)), &err);
1576   if (*err)
1577     return GTK_INPUT_ERROR;
1578   else
1579     return FALSE;
1580 }
1581
1582 static gint
1583 gtk_spin_button_default_output (GtkSpinButton *spin_button)
1584 {
1585   gchar *buf = g_strdup_printf ("%0.*f", spin_button->digits, spin_button->adjustment->value);
1586
1587   if (strcmp (buf, gtk_entry_get_text (GTK_ENTRY (spin_button))))
1588     gtk_entry_set_text (GTK_ENTRY (spin_button), buf);
1589   g_free (buf);
1590   return FALSE;
1591 }
1592
1593
1594 /***********************************************************
1595  ***********************************************************
1596  ***                  Public interface                   ***
1597  ***********************************************************
1598  ***********************************************************/
1599
1600
1601 /**
1602  * gtk_spin_button_configure:
1603  * @spin_button: a #GtkSpinButton
1604  * @adjustment: (allow-none):  a #GtkAdjustment.
1605  * @climb_rate: the new climb rate.
1606  * @digits: the number of decimal places to display in the spin button.
1607  *
1608  * Changes the properties of an existing spin button. The adjustment, climb rate,
1609  * and number of decimal places are all changed accordingly, after this function call.
1610  */
1611 void
1612 gtk_spin_button_configure (GtkSpinButton  *spin_button,
1613                            GtkAdjustment  *adjustment,
1614                            gdouble         climb_rate,
1615                            guint           digits)
1616 {
1617   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1618
1619   if (adjustment)
1620     gtk_spin_button_set_adjustment (spin_button, adjustment);
1621   else
1622     adjustment = spin_button->adjustment;
1623
1624   g_object_freeze_notify (G_OBJECT (spin_button));
1625   if (spin_button->digits != digits)
1626     {
1627       spin_button->digits = digits;
1628       g_object_notify (G_OBJECT (spin_button), "digits");
1629     }
1630
1631   if (spin_button->climb_rate != climb_rate)
1632     {
1633       spin_button->climb_rate = climb_rate;
1634       g_object_notify (G_OBJECT (spin_button), "climb-rate");
1635     }
1636   g_object_thaw_notify (G_OBJECT (spin_button));
1637
1638   gtk_adjustment_value_changed (adjustment);
1639 }
1640
1641 GtkWidget *
1642 gtk_spin_button_new (GtkAdjustment *adjustment,
1643                      gdouble        climb_rate,
1644                      guint          digits)
1645 {
1646   GtkSpinButton *spin;
1647
1648   if (adjustment)
1649     g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
1650
1651   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1652
1653   gtk_spin_button_configure (spin, adjustment, climb_rate, digits);
1654
1655   return GTK_WIDGET (spin);
1656 }
1657
1658 /**
1659  * gtk_spin_button_new_with_range:
1660  * @min: Minimum allowable value
1661  * @max: Maximum allowable value
1662  * @step: Increment added or subtracted by spinning the widget
1663  *
1664  * This is a convenience constructor that allows creation of a numeric
1665  * #GtkSpinButton without manually creating an adjustment. The value is
1666  * initially set to the minimum value and a page increment of 10 * @step
1667  * is the default. The precision of the spin button is equivalent to the
1668  * precision of @step.
1669  *
1670  * Note that the way in which the precision is derived works best if @step
1671  * is a power of ten. If the resulting precision is not suitable for your
1672  * needs, use gtk_spin_button_set_digits() to correct it.
1673  *
1674  * Return value: The new spin button as a #GtkWidget.
1675  **/
1676 GtkWidget *
1677 gtk_spin_button_new_with_range (gdouble min,
1678                                 gdouble max,
1679                                 gdouble step)
1680 {
1681   GtkObject *adj;
1682   GtkSpinButton *spin;
1683   gint digits;
1684
1685   g_return_val_if_fail (min <= max, NULL);
1686   g_return_val_if_fail (step != 0.0, NULL);
1687
1688   spin = g_object_new (GTK_TYPE_SPIN_BUTTON, NULL);
1689
1690   adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
1691
1692   if (fabs (step) >= 1.0 || step == 0.0)
1693     digits = 0;
1694   else {
1695     digits = abs ((gint) floor (log10 (fabs (step))));
1696     if (digits > MAX_DIGITS)
1697       digits = MAX_DIGITS;
1698   }
1699
1700   gtk_spin_button_configure (spin, GTK_ADJUSTMENT (adj), step, digits);
1701
1702   gtk_spin_button_set_numeric (spin, TRUE);
1703
1704   return GTK_WIDGET (spin);
1705 }
1706
1707 /* Callback used when the spin button's adjustment changes.  We need to redraw
1708  * the arrows when the adjustment's range changes, and reevaluate our size request.
1709  */
1710 static void
1711 adjustment_changed_cb (GtkAdjustment *adjustment, gpointer data)
1712 {
1713   GtkSpinButton *spin_button;
1714
1715   spin_button = GTK_SPIN_BUTTON (data);
1716
1717   spin_button->timer_step = spin_button->adjustment->step_increment;
1718   gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1719 }
1720
1721 /**
1722  * gtk_spin_button_set_adjustment:
1723  * @spin_button: a #GtkSpinButton
1724  * @adjustment: a #GtkAdjustment to replace the existing adjustment
1725  *
1726  * Replaces the #GtkAdjustment associated with @spin_button.
1727  **/
1728 void
1729 gtk_spin_button_set_adjustment (GtkSpinButton *spin_button,
1730                                 GtkAdjustment *adjustment)
1731 {
1732   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1733
1734   if (spin_button->adjustment != adjustment)
1735     {
1736       if (spin_button->adjustment)
1737         {
1738           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1739                                                 gtk_spin_button_value_changed,
1740                                                 spin_button);
1741           g_signal_handlers_disconnect_by_func (spin_button->adjustment,
1742                                                 adjustment_changed_cb,
1743                                                 spin_button);
1744           g_object_unref (spin_button->adjustment);
1745         }
1746       spin_button->adjustment = adjustment;
1747       if (adjustment)
1748         {
1749           g_object_ref_sink (adjustment);
1750           g_signal_connect (adjustment, "value-changed",
1751                             G_CALLBACK (gtk_spin_button_value_changed),
1752                             spin_button);
1753           g_signal_connect (adjustment, "changed",
1754                             G_CALLBACK (adjustment_changed_cb),
1755                             spin_button);
1756           spin_button->timer_step = spin_button->adjustment->step_increment;
1757         }
1758
1759       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1760     }
1761
1762   g_object_notify (G_OBJECT (spin_button), "adjustment");
1763 }
1764
1765 /**
1766  * gtk_spin_button_get_adjustment:
1767  * @spin_button: a #GtkSpinButton
1768  *
1769  * Get the adjustment associated with a #GtkSpinButton
1770  *
1771  * Return value: the #GtkAdjustment of @spin_button
1772  **/
1773 GtkAdjustment *
1774 gtk_spin_button_get_adjustment (GtkSpinButton *spin_button)
1775 {
1776   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), NULL);
1777
1778   return spin_button->adjustment;
1779 }
1780
1781 /**
1782  * gtk_spin_button_set_digits:
1783  * @spin_button: a #GtkSpinButton
1784  * @digits: the number of digits after the decimal point to be displayed for the spin button's value
1785  *
1786  * Set the precision to be displayed by @spin_button. Up to 20 digit precision
1787  * is allowed.
1788  **/
1789 void
1790 gtk_spin_button_set_digits (GtkSpinButton *spin_button,
1791                             guint          digits)
1792 {
1793   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1794
1795   if (spin_button->digits != digits)
1796     {
1797       spin_button->digits = digits;
1798       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
1799       g_object_notify (G_OBJECT (spin_button), "digits");
1800
1801       /* since lower/upper may have changed */
1802       gtk_widget_queue_resize (GTK_WIDGET (spin_button));
1803     }
1804 }
1805
1806 /**
1807  * gtk_spin_button_get_digits:
1808  * @spin_button: a #GtkSpinButton
1809  *
1810  * Fetches the precision of @spin_button. See gtk_spin_button_set_digits().
1811  *
1812  * Returns: the current precision
1813  **/
1814 guint
1815 gtk_spin_button_get_digits (GtkSpinButton *spin_button)
1816 {
1817   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1818
1819   return spin_button->digits;
1820 }
1821
1822 /**
1823  * gtk_spin_button_set_increments:
1824  * @spin_button: a #GtkSpinButton
1825  * @step: increment applied for a button 1 press.
1826  * @page: increment applied for a button 2 press.
1827  *
1828  * Sets the step and page increments for spin_button.  This affects how
1829  * quickly the value changes when the spin button's arrows are activated.
1830  **/
1831 void
1832 gtk_spin_button_set_increments (GtkSpinButton *spin_button,
1833                                 gdouble        step,
1834                                 gdouble        page)
1835 {
1836   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1837
1838   spin_button->adjustment->step_increment = step;
1839   spin_button->adjustment->page_increment = page;
1840 }
1841
1842 /**
1843  * gtk_spin_button_get_increments:
1844  * @spin_button: a #GtkSpinButton
1845  * @step: (allow-none): location to store step increment, or %NULL
1846  * @page: (allow-none): location to store page increment, or %NULL
1847  *
1848  * Gets the current step and page the increments used by @spin_button. See
1849  * gtk_spin_button_set_increments().
1850  **/
1851 void
1852 gtk_spin_button_get_increments (GtkSpinButton *spin_button,
1853                                 gdouble       *step,
1854                                 gdouble       *page)
1855 {
1856   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1857
1858   if (step)
1859     *step = spin_button->adjustment->step_increment;
1860   if (page)
1861     *page = spin_button->adjustment->page_increment;
1862 }
1863
1864 /**
1865  * gtk_spin_button_set_range:
1866  * @spin_button: a #GtkSpinButton
1867  * @min: minimum allowable value
1868  * @max: maximum allowable value
1869  *
1870  * Sets the minimum and maximum allowable values for @spin_button
1871  **/
1872 void
1873 gtk_spin_button_set_range (GtkSpinButton *spin_button,
1874                            gdouble        min,
1875                            gdouble        max)
1876 {
1877   gdouble value;
1878
1879   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1880
1881   spin_button->adjustment->lower = min;
1882   spin_button->adjustment->upper = max;
1883
1884   value = CLAMP (spin_button->adjustment->value,
1885                  spin_button->adjustment->lower,
1886                  (spin_button->adjustment->upper - spin_button->adjustment->page_size));
1887
1888   if (value != spin_button->adjustment->value)
1889     gtk_spin_button_set_value (spin_button, value);
1890
1891   gtk_adjustment_changed (spin_button->adjustment);
1892 }
1893
1894 /**
1895  * gtk_spin_button_get_range:
1896  * @spin_button: a #GtkSpinButton
1897  * @min: (allow-none): location to store minimum allowed value, or %NULL
1898  * @max: (allow-none): location to store maximum allowed value, or %NULL
1899  *
1900  * Gets the range allowed for @spin_button. See
1901  * gtk_spin_button_set_range().
1902  **/
1903 void
1904 gtk_spin_button_get_range (GtkSpinButton *spin_button,
1905                            gdouble       *min,
1906                            gdouble       *max)
1907 {
1908   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1909
1910   if (min)
1911     *min = spin_button->adjustment->lower;
1912   if (max)
1913     *max = spin_button->adjustment->upper;
1914 }
1915
1916 /**
1917  * gtk_spin_button_get_value:
1918  * @spin_button: a #GtkSpinButton
1919  *
1920  * Get the value in the @spin_button.
1921  *
1922  * Return value: the value of @spin_button
1923  **/
1924 gdouble
1925 gtk_spin_button_get_value (GtkSpinButton *spin_button)
1926 {
1927   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0.0);
1928
1929   return spin_button->adjustment->value;
1930 }
1931
1932 /**
1933  * gtk_spin_button_get_value_as_int:
1934  * @spin_button: a #GtkSpinButton
1935  *
1936  * Get the value @spin_button represented as an integer.
1937  *
1938  * Return value: the value of @spin_button
1939  **/
1940 gint
1941 gtk_spin_button_get_value_as_int (GtkSpinButton *spin_button)
1942 {
1943   gdouble val;
1944
1945   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), 0);
1946
1947   val = spin_button->adjustment->value;
1948   if (val - floor (val) < ceil (val) - val)
1949     return floor (val);
1950   else
1951     return ceil (val);
1952 }
1953
1954 /**
1955  * gtk_spin_button_set_value:
1956  * @spin_button: a #GtkSpinButton
1957  * @value: the new value
1958  *
1959  * Set the value of @spin_button.
1960  **/
1961 void
1962 gtk_spin_button_set_value (GtkSpinButton *spin_button,
1963                            gdouble        value)
1964 {
1965   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1966
1967   if (fabs (value - spin_button->adjustment->value) > EPSILON)
1968     gtk_adjustment_set_value (spin_button->adjustment, value);
1969   else
1970     {
1971       gint return_val = FALSE;
1972       g_signal_emit (spin_button, spinbutton_signals[OUTPUT], 0, &return_val);
1973       if (return_val == FALSE)
1974         gtk_spin_button_default_output (spin_button);
1975     }
1976 }
1977
1978 /**
1979  * gtk_spin_button_set_update_policy:
1980  * @spin_button: a #GtkSpinButton
1981  * @policy: a #GtkSpinButtonUpdatePolicy value
1982  *
1983  * Sets the update behavior of a spin button. This determines whether the
1984  * spin button is always updated or only when a valid value is set.
1985  **/
1986 void
1987 gtk_spin_button_set_update_policy (GtkSpinButton             *spin_button,
1988                                    GtkSpinButtonUpdatePolicy  policy)
1989 {
1990   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
1991
1992   if (spin_button->update_policy != policy)
1993     {
1994       spin_button->update_policy = policy;
1995       g_object_notify (G_OBJECT (spin_button), "update-policy");
1996     }
1997 }
1998
1999 /**
2000  * gtk_spin_button_get_update_policy:
2001  * @spin_button: a #GtkSpinButton
2002  *
2003  * Gets the update behavior of a spin button. See
2004  * gtk_spin_button_set_update_policy().
2005  *
2006  * Return value: the current update policy
2007  **/
2008 GtkSpinButtonUpdatePolicy
2009 gtk_spin_button_get_update_policy (GtkSpinButton *spin_button)
2010 {
2011   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), GTK_UPDATE_ALWAYS);
2012
2013   return spin_button->update_policy;
2014 }
2015
2016 /**
2017  * gtk_spin_button_set_numeric:
2018  * @spin_button: a #GtkSpinButton
2019  * @numeric: flag indicating if only numeric entry is allowed.
2020  *
2021  * Sets the flag that determines if non-numeric text can be typed into
2022  * the spin button.
2023  **/
2024 void
2025 gtk_spin_button_set_numeric (GtkSpinButton  *spin_button,
2026                              gboolean        numeric)
2027 {
2028   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2029
2030   numeric = numeric != FALSE;
2031
2032   if (spin_button->numeric != numeric)
2033     {
2034        spin_button->numeric = numeric;
2035        g_object_notify (G_OBJECT (spin_button), "numeric");
2036     }
2037 }
2038
2039 /**
2040  * gtk_spin_button_get_numeric:
2041  * @spin_button: a #GtkSpinButton
2042  *
2043  * Returns whether non-numeric text can be typed into the spin button.
2044  * See gtk_spin_button_set_numeric().
2045  *
2046  * Return value: %TRUE if only numeric text can be entered
2047  **/
2048 gboolean
2049 gtk_spin_button_get_numeric (GtkSpinButton *spin_button)
2050 {
2051   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2052
2053   return spin_button->numeric;
2054 }
2055
2056 /**
2057  * gtk_spin_button_set_wrap:
2058  * @spin_button: a #GtkSpinButton
2059  * @wrap: a flag indicating if wrapping behavior is performed.
2060  *
2061  * Sets the flag that determines if a spin button value wraps around to the
2062  * opposite limit when the upper or lower limit of the range is exceeded.
2063  **/
2064 void
2065 gtk_spin_button_set_wrap (GtkSpinButton  *spin_button,
2066                           gboolean        wrap)
2067 {
2068   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2069
2070   wrap = wrap != FALSE;
2071
2072   if (spin_button->wrap != wrap)
2073     {
2074        spin_button->wrap = (wrap != 0);
2075
2076        g_object_notify (G_OBJECT (spin_button), "wrap");
2077     }
2078 }
2079
2080 /**
2081  * gtk_spin_button_get_wrap:
2082  * @spin_button: a #GtkSpinButton
2083  *
2084  * Returns whether the spin button's value wraps around to the
2085  * opposite limit when the upper or lower limit of the range is
2086  * exceeded. See gtk_spin_button_set_wrap().
2087  *
2088  * Return value: %TRUE if the spin button wraps around
2089  **/
2090 gboolean
2091 gtk_spin_button_get_wrap (GtkSpinButton *spin_button)
2092 {
2093   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2094
2095   return spin_button->wrap;
2096 }
2097
2098 static gint
2099 spin_button_get_arrow_size (GtkSpinButton *spin_button)
2100 {
2101   gint size = pango_font_description_get_size (GTK_WIDGET (spin_button)->style->font_desc);
2102   gint arrow_size;
2103
2104   arrow_size = MAX (PANGO_PIXELS (size), MIN_ARROW_WIDTH);
2105
2106   return arrow_size - arrow_size % 2; /* force even */
2107 }
2108
2109 /**
2110  * spin_button_get_shadow_type:
2111  * @spin_button: a #GtkSpinButton
2112  *
2113  * Convenience function to Get the shadow type from the underlying widget's
2114  * style.
2115  *
2116  * Return value: the #GtkShadowType
2117  **/
2118 static gint
2119 spin_button_get_shadow_type (GtkSpinButton *spin_button)
2120 {
2121   GtkShadowType rc_shadow_type;
2122
2123   gtk_widget_style_get (GTK_WIDGET (spin_button), "shadow-type", &rc_shadow_type, NULL);
2124
2125   return rc_shadow_type;
2126 }
2127
2128 /**
2129  * gtk_spin_button_set_snap_to_ticks:
2130  * @spin_button: a #GtkSpinButton
2131  * @snap_to_ticks: a flag indicating if invalid values should be corrected.
2132  *
2133  * Sets the policy as to whether values are corrected to the nearest step
2134  * increment when a spin button is activated after providing an invalid value.
2135  **/
2136 void
2137 gtk_spin_button_set_snap_to_ticks (GtkSpinButton *spin_button,
2138                                    gboolean       snap_to_ticks)
2139 {
2140   guint new_val;
2141
2142   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2143
2144   new_val = (snap_to_ticks != 0);
2145
2146   if (new_val != spin_button->snap_to_ticks)
2147     {
2148       spin_button->snap_to_ticks = new_val;
2149       if (new_val && GTK_ENTRY (spin_button)->editable)
2150         gtk_spin_button_update (spin_button);
2151
2152       g_object_notify (G_OBJECT (spin_button), "snap-to-ticks");
2153     }
2154 }
2155
2156 /**
2157  * gtk_spin_button_get_snap_to_ticks:
2158  * @spin_button: a #GtkSpinButton
2159  *
2160  * Returns whether the values are corrected to the nearest step. See
2161  * gtk_spin_button_set_snap_to_ticks().
2162  *
2163  * Return value: %TRUE if values are snapped to the nearest step.
2164  **/
2165 gboolean
2166 gtk_spin_button_get_snap_to_ticks (GtkSpinButton *spin_button)
2167 {
2168   g_return_val_if_fail (GTK_IS_SPIN_BUTTON (spin_button), FALSE);
2169
2170   return spin_button->snap_to_ticks;
2171 }
2172
2173 /**
2174  * gtk_spin_button_spin:
2175  * @spin_button: a #GtkSpinButton
2176  * @direction: a #GtkSpinType indicating the direction to spin.
2177  * @increment: step increment to apply in the specified direction.
2178  *
2179  * Increment or decrement a spin button's value in a specified direction
2180  * by a specified amount.
2181  **/
2182 void
2183 gtk_spin_button_spin (GtkSpinButton *spin_button,
2184                       GtkSpinType    direction,
2185                       gdouble        increment)
2186 {
2187   GtkAdjustment *adj;
2188   gdouble diff;
2189
2190   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2191
2192   adj = spin_button->adjustment;
2193
2194   /* for compatibility with the 1.0.x version of this function */
2195   if (increment != 0 && increment != adj->step_increment &&
2196       (direction == GTK_SPIN_STEP_FORWARD ||
2197        direction == GTK_SPIN_STEP_BACKWARD))
2198     {
2199       if (direction == GTK_SPIN_STEP_BACKWARD && increment > 0)
2200         increment = -increment;
2201       direction = GTK_SPIN_USER_DEFINED;
2202     }
2203
2204   switch (direction)
2205     {
2206     case GTK_SPIN_STEP_FORWARD:
2207
2208       gtk_spin_button_real_spin (spin_button, adj->step_increment);
2209       break;
2210
2211     case GTK_SPIN_STEP_BACKWARD:
2212
2213       gtk_spin_button_real_spin (spin_button, -adj->step_increment);
2214       break;
2215
2216     case GTK_SPIN_PAGE_FORWARD:
2217
2218       gtk_spin_button_real_spin (spin_button, adj->page_increment);
2219       break;
2220
2221     case GTK_SPIN_PAGE_BACKWARD:
2222
2223       gtk_spin_button_real_spin (spin_button, -adj->page_increment);
2224       break;
2225
2226     case GTK_SPIN_HOME:
2227
2228       diff = adj->value - adj->lower;
2229       if (diff > EPSILON)
2230         gtk_spin_button_real_spin (spin_button, -diff);
2231       break;
2232
2233     case GTK_SPIN_END:
2234
2235       diff = adj->upper - adj->value;
2236       if (diff > EPSILON)
2237         gtk_spin_button_real_spin (spin_button, diff);
2238       break;
2239
2240     case GTK_SPIN_USER_DEFINED:
2241
2242       if (increment != 0)
2243         gtk_spin_button_real_spin (spin_button, increment);
2244       break;
2245
2246     default:
2247       break;
2248     }
2249 }
2250
2251 /**
2252  * gtk_spin_button_update:
2253  * @spin_button: a #GtkSpinButton
2254  *
2255  * Manually force an update of the spin button.
2256  **/
2257 void
2258 gtk_spin_button_update (GtkSpinButton *spin_button)
2259 {
2260   gdouble val;
2261   gint error = 0;
2262   gint return_val;
2263
2264   g_return_if_fail (GTK_IS_SPIN_BUTTON (spin_button));
2265
2266   return_val = FALSE;
2267   g_signal_emit (spin_button, spinbutton_signals[INPUT], 0, &val, &return_val);
2268   if (return_val == FALSE)
2269     {
2270       return_val = gtk_spin_button_default_input (spin_button, &val);
2271       error = (return_val == GTK_INPUT_ERROR);
2272     }
2273   else if (return_val == GTK_INPUT_ERROR)
2274     error = 1;
2275
2276   gtk_widget_queue_draw (GTK_WIDGET (spin_button));
2277
2278   if (spin_button->update_policy == GTK_UPDATE_ALWAYS)
2279     {
2280       if (val < spin_button->adjustment->lower)
2281         val = spin_button->adjustment->lower;
2282       else if (val > spin_button->adjustment->upper)
2283         val = spin_button->adjustment->upper;
2284     }
2285   else if ((spin_button->update_policy == GTK_UPDATE_IF_VALID) &&
2286            (error ||
2287            val < spin_button->adjustment->lower ||
2288            val > spin_button->adjustment->upper))
2289     {
2290       gtk_spin_button_value_changed (spin_button->adjustment, spin_button);
2291       return;
2292     }
2293
2294   if (spin_button->snap_to_ticks)
2295     gtk_spin_button_snap (spin_button, val);
2296   else
2297     gtk_spin_button_set_value (spin_button, val);
2298 }
2299
2300 #define __GTK_SPIN_BUTTON_C__
2301 #include "gtkaliasdef.c"