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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  * Copyright (C) 2001 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22  * Modified by the GTK+ Team and others 1997-2004.  See the AUTHORS
  23  * file for a list of people on the GTK+ Team.  See the ChangeLog
  24  * files for a list of changes.  These files are distributed with
  25  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  26  */
  27
  28 #include "config.h"
  29
  30 #include <stdio.h>
  31 #include <math.h>
  32
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtkorientableprivate.h"
  36 #include "gtkrange.h"
  37 #include "gtkscale.h"
  38 #include "gtkscrollbar.h"
  39 #include "gtkwindow.h"
  40 #include "gtkprivate.h"
  41 #include "gtkintl.h"
  42 #include "gtkmain.h"
  43 #include "gtktypebuiltins.h"
  44 #include "a11y/gtkrangeaccessible.h"
  45
  46 /**
  47  * SECTION:gtkrange
  48  * @Short_description: Base class for widgets which visualize an adjustment
  49  * @Title: GtkRange
  50  *
  51  * #GtkRange is the common base class for widgets which visualize an
  52  * adjustment, e.g #GtkScale or #GtkScrollbar.
  53  *
  54  * Apart from signals for monitoring the parameters of the adjustment,
  55  * #GtkRange provides properties and methods for influencing the sensitivity
  56  * of the "steppers". It also provides properties and methods for setting a
  57  * "fill level" on range widgets. See gtk_range_set_fill_level().
  58  */
  59
  60
  61 #define SCROLL_DELAY_FACTOR 5    /* Scroll repeat multiplier */
  62 #define UPDATE_DELAY        300  /* Delay for queued update */
  63
  64 typedef struct _GtkRangeStepTimer GtkRangeStepTimer;
  65
  66 typedef enum {
  67   MOUSE_OUTSIDE,
  68   MOUSE_STEPPER_A,
  69   MOUSE_STEPPER_B,
  70   MOUSE_STEPPER_C,
  71   MOUSE_STEPPER_D,
  72   MOUSE_TROUGH,
  73   MOUSE_SLIDER,
  74   MOUSE_WIDGET /* inside widget but not in any of the above GUI elements */
  75 } MouseLocation;
  76
  77 struct _GtkRangePrivate
  78 {
  79   MouseLocation      mouse_location;
  80   /* last mouse coords we got, or -1 if mouse is outside the range */
  81   gint  mouse_x;
  82   gint  mouse_y;
  83   MouseLocation      grab_location;   /* "grabbed" mouse location, OUTSIDE for no grab */
  84
  85   GtkRangeStepTimer *timer;
  86
  87   GtkAdjustment     *adjustment;
  88   GtkSensitivityType lower_sensitivity;
  89   GtkSensitivityType upper_sensitivity;
  90
  91   GdkDevice         *grab_device;
  92   GdkRectangle       range_rect;     /* Area of entire stepper + trough assembly in widget->window coords */
  93   /* These are in widget->window coordinates */
  94   GdkRectangle       stepper_a;
  95   GdkRectangle       stepper_b;
  96   GdkRectangle       stepper_c;
  97   GdkRectangle       stepper_d;
  98   GdkRectangle       trough;         /* The trough rectangle is the area the thumb can slide in, not the entire range_rect */
  99   GdkRectangle       slider;
 100   GdkWindow         *event_window;
 101
 102   GQuark             slider_detail_quark;
 103   GQuark             stepper_detail_quark[4];
 104
 105   GtkOrientation     orientation;
 106
 107   gdouble  fill_level;
 108   gdouble *marks;
 109
 110   gint *mark_pos;
 111   gint  min_slider_size;
 112   gint  n_marks;
 113   gint  round_digits;                /* Round off value to this many digits, -1 for no rounding */
 114   gint  slide_initial_slider_position;
 115   gint  slide_initial_coordinate;
 116   gint  slider_start;                /* Slider range along the long dimension, in widget->window coords */
 117   gint  slider_end;
 118
 119   guint repaint_id;
 120
 121   /* Steppers are: < > ---- < >
 122    *               a b      c d
 123    */
 124   guint has_stepper_a          : 1;
 125   guint has_stepper_b          : 1;
 126   guint has_stepper_c          : 1;
 127   guint has_stepper_d          : 1;
 128
 129   guint flippable              : 1;
 130   guint inverted               : 1;
 131   guint need_recalc            : 1;
 132   guint recalc_marks           : 1;
 133   guint slider_size_fixed      : 1;
 134   guint trough_click_forward   : 1;  /* trough click was on the forward side of slider */
 135
 136   /* Stepper sensitivity */
 137   guint lower_sensitive        : 1;
 138   guint upper_sensitive        : 1;
 139
 140   /* Fill level */
 141   guint show_fill_level        : 1;
 142   guint restrict_to_fill_level : 1;
 143
 144   guint grab_button            : 8; /* 0 if none */
 145 };
 146
 147
 148 enum {
 149   PROP_0,
 150   PROP_ORIENTATION,
 151   PROP_ADJUSTMENT,
 152   PROP_INVERTED,
 153   PROP_LOWER_STEPPER_SENSITIVITY,
 154   PROP_UPPER_STEPPER_SENSITIVITY,
 155   PROP_SHOW_FILL_LEVEL,
 156   PROP_RESTRICT_TO_FILL_LEVEL,
 157   PROP_FILL_LEVEL,
 158   PROP_ROUND_DIGITS
 159 };
 160
 161 enum {
 162   VALUE_CHANGED,
 163   ADJUST_BOUNDS,
 164   MOVE_SLIDER,
 165   CHANGE_VALUE,
 166   LAST_SIGNAL
 167 };
 168
 169 typedef enum {
 170   STEPPER_A,
 171   STEPPER_B,
 172   STEPPER_C,
 173   STEPPER_D
 174 } Stepper;
 175
 176 static void gtk_range_set_property   (GObject          *object,
 177                                       guint             prop_id,
 178                                       const GValue     *value,
 179                                       GParamSpec       *pspec);
 180 static void gtk_range_get_property   (GObject          *object,
 181                                       guint             prop_id,
 182                                       GValue           *value,
 183                                       GParamSpec       *pspec);
 184 static void gtk_range_destroy        (GtkWidget        *widget);
 185 static void gtk_range_get_preferred_width
 186                                      (GtkWidget        *widget,
 187                                       gint             *minimum,
 188                                       gint             *natural);
 189 static void gtk_range_get_preferred_height
 190                                      (GtkWidget        *widget,
 191                                       gint             *minimum,
 192                                       gint             *natural);
 193 static void gtk_range_size_allocate  (GtkWidget        *widget,
 194                                       GtkAllocation    *allocation);
 195 static void gtk_range_hierarchy_changed (GtkWidget     *widget,
 196                                          GtkWidget     *previous_toplevel);
 197 static void gtk_range_realize        (GtkWidget        *widget);
 198 static void gtk_range_unrealize      (GtkWidget        *widget);
 199 static void gtk_range_map            (GtkWidget        *widget);
 200 static void gtk_range_unmap          (GtkWidget        *widget);
 201 static gboolean gtk_range_draw       (GtkWidget        *widget,
 202                                       cairo_t          *cr);
 203 static gboolean gtk_range_button_press   (GtkWidget        *widget,
 204                                       GdkEventButton   *event);
 205 static gboolean gtk_range_button_release (GtkWidget        *widget,
 206                                       GdkEventButton   *event);
 207 static gboolean gtk_range_motion_notify  (GtkWidget        *widget,
 208                                       GdkEventMotion   *event);
 209 static gboolean gtk_range_enter_notify   (GtkWidget        *widget,
 210                                       GdkEventCrossing *event);
 211 static gboolean gtk_range_leave_notify   (GtkWidget        *widget,
 212                                       GdkEventCrossing *event);
 213 static gboolean gtk_range_grab_broken (GtkWidget          *widget,
 214                                        GdkEventGrabBroken *event);
 215 static void gtk_range_grab_notify    (GtkWidget          *widget,
 216                                       gboolean            was_grabbed);
 217 static void gtk_range_state_flags_changed  (GtkWidget      *widget,
 218                                             GtkStateFlags   previous_state);
 219 static gboolean gtk_range_scroll_event   (GtkWidget        *widget,
 220                                       GdkEventScroll   *event);
 221 static void gtk_range_style_updated  (GtkWidget        *widget);
 222 static void update_slider_position   (GtkRange         *range,
 223                                       gint              mouse_x,
 224                                       gint              mouse_y);
 225 static void stop_scrolling           (GtkRange         *range);
 226 static gboolean modify_allocation_for_window_grip (GtkWidget     *widget,
 227                                                    GtkAllocation *allocation);
 228
 229 /* Range methods */
 230
 231 static void gtk_range_move_slider              (GtkRange         *range,
 232                                                 GtkScrollType     scroll);
 233
 234 /* Internals */
 235 static gboolean      gtk_range_scroll                   (GtkRange      *range,
 236                                                          GtkScrollType  scroll);
 237 static gboolean      gtk_range_update_mouse_location    (GtkRange      *range);
 238 static void          gtk_range_calc_layout              (GtkRange      *range,
 239                                                          gdouble        adjustment_value);
 240 static void          gtk_range_calc_marks               (GtkRange      *range);
 241 static void          gtk_range_get_props                (GtkRange      *range,
 242                                                          gint          *slider_width,
 243                                                          gint          *stepper_size,
 244                                                          gint          *focus_width,
 245                                                          gint          *trough_border,
 246                                                          gint          *stepper_spacing,
 247                                                          gboolean      *trough_under_steppers,
 248                                                          gint          *arrow_displacement_x,
 249                                                          gint          *arrow_displacement_y);
 250 static void          gtk_range_calc_request             (GtkRange      *range,
 251                                                          gint           slider_width,
 252                                                          gint           stepper_size,
 253                                                          gint           focus_width,
 254                                                          gint           trough_border,
 255                                                          gint           stepper_spacing,
 256                                                          GdkRectangle  *range_rect,
 257                                                          GtkBorder     *border,
 258                                                          gint          *n_steppers_p,
 259                                                          gboolean      *has_steppers_ab,
 260                                                          gboolean      *has_steppers_cd,
 261                                                          gint          *slider_length_p);
 262 static void          gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
 263                                                          gpointer       data);
 264 static void          gtk_range_adjustment_changed       (GtkAdjustment *adjustment,
 265                                                          gpointer       data);
 266 static void          gtk_range_add_step_timer           (GtkRange      *range,
 267                                                          GtkScrollType  step);
 268 static void          gtk_range_remove_step_timer        (GtkRange      *range);
 269 static GdkRectangle* get_area                           (GtkRange      *range,
 270                                                          MouseLocation  location);
 271 static gboolean      gtk_range_real_change_value        (GtkRange      *range,
 272                                                          GtkScrollType  scroll,
 273                                                          gdouble        value);
 274 static gboolean      gtk_range_key_press                (GtkWidget     *range,
 275                                                          GdkEventKey   *event);
 276
 277
 278 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GtkRange, gtk_range, GTK_TYPE_WIDGET,
 279                                   G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 280                                                          NULL))
 281
 282 static guint signals[LAST_SIGNAL];
 283
 284
 285 static void
 286 gtk_range_class_init (GtkRangeClass *class)
 287 {
 288   GObjectClass   *gobject_class;
 289   GtkWidgetClass *widget_class;
 290
 291   gobject_class = G_OBJECT_CLASS (class);
 292   widget_class = (GtkWidgetClass*) class;
 293
 294   gobject_class->set_property = gtk_range_set_property;
 295   gobject_class->get_property = gtk_range_get_property;
 296
 297   widget_class->destroy = gtk_range_destroy;
 298   widget_class->get_preferred_width = gtk_range_get_preferred_width;
 299   widget_class->get_preferred_height = gtk_range_get_preferred_height;
 300   widget_class->size_allocate = gtk_range_size_allocate;
 301   widget_class->hierarchy_changed = gtk_range_hierarchy_changed;
 302   widget_class->realize = gtk_range_realize;
 303   widget_class->unrealize = gtk_range_unrealize;
 304   widget_class->map = gtk_range_map;
 305   widget_class->unmap = gtk_range_unmap;
 306   widget_class->draw = gtk_range_draw;
 307   widget_class->button_press_event = gtk_range_button_press;
 308   widget_class->button_release_event = gtk_range_button_release;
 309   widget_class->motion_notify_event = gtk_range_motion_notify;
 310   widget_class->scroll_event = gtk_range_scroll_event;
 311   widget_class->enter_notify_event = gtk_range_enter_notify;
 312   widget_class->leave_notify_event = gtk_range_leave_notify;
 313   widget_class->grab_broken_event = gtk_range_grab_broken;
 314   widget_class->grab_notify = gtk_range_grab_notify;
 315   widget_class->state_flags_changed = gtk_range_state_flags_changed;
 316   widget_class->style_updated = gtk_range_style_updated;
 317   widget_class->key_press_event = gtk_range_key_press;
 318
 319   class->move_slider = gtk_range_move_slider;
 320   class->change_value = gtk_range_real_change_value;
 321
 322   class->slider_detail = "slider";
 323   class->stepper_detail = "stepper";
 324
 325   /**
 326    * GtkRange::value-changed:
 327    * @range: the #GtkRange that received the signal
 328    *
 329    * Emitted when the range value changes.
 330    */
 331   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 (GtkRangeClass, value_changed),
 336                   NULL, NULL,
 337                   _gtk_marshal_VOID__VOID,
 338                   G_TYPE_NONE, 0);
 339
 340   /**
 341    * GtkRange::adjust-bounds:
 342    * @range: the #GtkRange that received the signal
 343    * @value: the value before we clamp
 344    *
 345    * Emitted before clamping a value, to give the application a
 346    * chance to adjust the bounds.
 347    */
 348   signals[ADJUST_BOUNDS] =
 349     g_signal_new (I_("adjust-bounds"),
 350                   G_TYPE_FROM_CLASS (gobject_class),
 351                   G_SIGNAL_RUN_LAST,
 352                   G_STRUCT_OFFSET (GtkRangeClass, adjust_bounds),
 353                   NULL, NULL,
 354                   _gtk_marshal_VOID__DOUBLE,
 355                   G_TYPE_NONE, 1,
 356                   G_TYPE_DOUBLE);
 357
 358   /**
 359    * GtkRange::move-slider:
 360    * @range: the #GtkRange that received the signal
 361    * @step: how to move the slider
 362    *
 363    * Virtual function that moves the slider. Used for keybindings.
 364    */
 365   signals[MOVE_SLIDER] =
 366     g_signal_new (I_("move-slider"),
 367                   G_TYPE_FROM_CLASS (gobject_class),
 368                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 369                   G_STRUCT_OFFSET (GtkRangeClass, move_slider),
 370                   NULL, NULL,
 371                   _gtk_marshal_VOID__ENUM,
 372                   G_TYPE_NONE, 1,
 373                   GTK_TYPE_SCROLL_TYPE);
 374
 375   /**
 376    * GtkRange::change-value:
 377    * @range: the #GtkRange that received the signal
 378    * @scroll: the type of scroll action that was performed
 379    * @value: the new value resulting from the scroll action
 380    * @returns: %TRUE to prevent other handlers from being invoked for the
 381    * signal, %FALSE to propagate the signal further
 382    *
 383    * The #GtkRange::change-value signal is emitted when a scroll action is
 384    * performed on a range.  It allows an application to determine the
 385    * type of scroll event that occurred and the resultant new value.
 386    * The application can handle the event itself and return %TRUE to
 387    * prevent further processing.  Or, by returning %FALSE, it can pass
 388    * the event to other handlers until the default GTK+ handler is
 389    * reached.
 390    *
 391    * The value parameter is unrounded.  An application that overrides
 392    * the GtkRange::change-value signal is responsible for clamping the
 393    * value to the desired number of decimal digits; the default GTK+
 394    * handler clamps the value based on #GtkRange:round-digits.
 395    *
 396    * It is not possible to use delayed update policies in an overridden
 397    * #GtkRange::change-value handler.
 398    *
 399    * Since: 2.6
 400    */
 401   signals[CHANGE_VALUE] =
 402     g_signal_new (I_("change-value"),
 403                   G_TYPE_FROM_CLASS (gobject_class),
 404                   G_SIGNAL_RUN_LAST,
 405                   G_STRUCT_OFFSET (GtkRangeClass, change_value),
 406                   _gtk_boolean_handled_accumulator, NULL,
 407                   _gtk_marshal_BOOLEAN__ENUM_DOUBLE,
 408                   G_TYPE_BOOLEAN, 2,
 409                   GTK_TYPE_SCROLL_TYPE,
 410                   G_TYPE_DOUBLE);
 411
 412   g_object_class_override_property (gobject_class,
 413                                     PROP_ORIENTATION,
 414                                     "orientation");
 415
 416   g_object_class_install_property (gobject_class,
 417                                    PROP_ADJUSTMENT,
 418                                    g_param_spec_object ("adjustment",
 419                                                         P_("Adjustment"),
 420                                                         P_("The GtkAdjustment that contains the current value of this range object"),
 421                                                         GTK_TYPE_ADJUSTMENT,
 422                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 423
 424   g_object_class_install_property (gobject_class,
 425                                    PROP_INVERTED,
 426                                    g_param_spec_boolean ("inverted",
 427                                                         P_("Inverted"),
 428                                                         P_("Invert direction slider moves to increase range value"),
 429                                                          FALSE,
 430                                                          GTK_PARAM_READWRITE));
 431
 432   g_object_class_install_property (gobject_class,
 433                                    PROP_LOWER_STEPPER_SENSITIVITY,
 434                                    g_param_spec_enum ("lower-stepper-sensitivity",
 435                                                       P_("Lower stepper sensitivity"),
 436                                                       P_("The sensitivity policy for the stepper that points to the adjustment's lower side"),
 437                                                       GTK_TYPE_SENSITIVITY_TYPE,
 438                                                       GTK_SENSITIVITY_AUTO,
 439                                                       GTK_PARAM_READWRITE));
 440
 441   g_object_class_install_property (gobject_class,
 442                                    PROP_UPPER_STEPPER_SENSITIVITY,
 443                                    g_param_spec_enum ("upper-stepper-sensitivity",
 444                                                       P_("Upper stepper sensitivity"),
 445                                                       P_("The sensitivity policy for the stepper that points to the adjustment's upper side"),
 446                                                       GTK_TYPE_SENSITIVITY_TYPE,
 447                                                       GTK_SENSITIVITY_AUTO,
 448                                                       GTK_PARAM_READWRITE));
 449
 450   /**
 451    * GtkRange:show-fill-level:
 452    *
 453    * The show-fill-level property controls whether fill level indicator
 454    * graphics are displayed on the trough. See
 455    * gtk_range_set_show_fill_level().
 456    *
 457    * Since: 2.12
 458    **/
 459   g_object_class_install_property (gobject_class,
 460                                    PROP_SHOW_FILL_LEVEL,
 461                                    g_param_spec_boolean ("show-fill-level",
 462                                                          P_("Show Fill Level"),
 463                                                          P_("Whether to display a fill level indicator graphics on trough."),
 464                                                          FALSE,
 465                                                          GTK_PARAM_READWRITE));
 466
 467   /**
 468    * GtkRange:restrict-to-fill-level:
 469    *
 470    * The restrict-to-fill-level property controls whether slider
 471    * movement is restricted to an upper boundary set by the
 472    * fill level. See gtk_range_set_restrict_to_fill_level().
 473    *
 474    * Since: 2.12
 475    **/
 476   g_object_class_install_property (gobject_class,
 477                                    PROP_RESTRICT_TO_FILL_LEVEL,
 478                                    g_param_spec_boolean ("restrict-to-fill-level",
 479                                                          P_("Restrict to Fill Level"),
 480                                                          P_("Whether to restrict the upper boundary to the fill level."),
 481                                                          TRUE,
 482                                                          GTK_PARAM_READWRITE));
 483
 484   /**
 485    * GtkRange:fill-level:
 486    *
 487    * The fill level (e.g. prebuffering of a network stream).
 488    * See gtk_range_set_fill_level().
 489    *
 490    * Since: 2.12
 491    **/
 492   g_object_class_install_property (gobject_class,
 493                                    PROP_FILL_LEVEL,
 494                                    g_param_spec_double ("fill-level",
 495                                                         P_("Fill Level"),
 496                                                         P_("The fill level."),
 497                                                         -G_MAXDOUBLE,
 498                                                         G_MAXDOUBLE,
 499                                                         G_MAXDOUBLE,
 500                                                         GTK_PARAM_READWRITE));
 501
 502   /**
 503    * GtkRange:round-digits:
 504    *
 505    * The number of digits to round the value to when
 506    * it changes, or -1. See #GtkRange::change-value.
 507    *
 508    * Since: 2.24
 509    */
 510   g_object_class_install_property (gobject_class,
 511                                    PROP_ROUND_DIGITS,
 512                                    g_param_spec_int ("round-digits",
 513                                                      P_("Round Digits"),
 514                                                      P_("The number of digits to round the value to."),
 515                                                      -1,
 516                                                      G_MAXINT,
 517                                                      -1,
 518                                                      GTK_PARAM_READWRITE));
 519
 520   gtk_widget_class_install_style_property (widget_class,
 521                                            g_param_spec_int ("slider-width",
 522                                                              P_("Slider Width"),
 523                                                              P_("Width of scrollbar or scale thumb"),
 524                                                              0,
 525                                                              G_MAXINT,
 526                                                              14,
 527                                                              GTK_PARAM_READABLE));
 528   gtk_widget_class_install_style_property (widget_class,
 529                                            g_param_spec_int ("trough-border",
 530                                                              P_("Trough Border"),
 531                                                              P_("Spacing between thumb/steppers and outer trough bevel"),
 532                                                              0,
 533                                                              G_MAXINT,
 534                                                              1,
 535                                                              GTK_PARAM_READABLE));
 536   gtk_widget_class_install_style_property (widget_class,
 537                                            g_param_spec_int ("stepper-size",
 538                                                              P_("Stepper Size"),
 539                                                              P_("Length of step buttons at ends"),
 540                                                              0,
 541                                                              G_MAXINT,
 542                                                              14,
 543                                                              GTK_PARAM_READABLE));
 544   /**
 545    * GtkRange:stepper-spacing:
 546    *
 547    * The spacing between the stepper buttons and thumb. Note that
 548    * stepper-spacing won't have any effect if there are no steppers.
 549    */
 550   gtk_widget_class_install_style_property (widget_class,
 551                                            g_param_spec_int ("stepper-spacing",
 552                                                              P_("Stepper Spacing"),
 553                                                              P_("Spacing between step buttons and thumb"),
 554                                                              0,
 555                                                              G_MAXINT,
 556                                                              0,
 557                                                              GTK_PARAM_READABLE));
 558   gtk_widget_class_install_style_property (widget_class,
 559                                            g_param_spec_int ("arrow-displacement-x",
 560                                                              P_("Arrow X Displacement"),
 561                                                              P_("How far in the x direction to move the arrow when the button is depressed"),
 562                                                              G_MININT,
 563                                                              G_MAXINT,
 564                                                              0,
 565                                                              GTK_PARAM_READABLE));
 566   gtk_widget_class_install_style_property (widget_class,
 567                                            g_param_spec_int ("arrow-displacement-y",
 568                                                              P_("Arrow Y Displacement"),
 569                                                              P_("How far in the y direction to move the arrow when the button is depressed"),
 570                                                              G_MININT,
 571                                                              G_MAXINT,
 572                                                              0,
 573                                                              GTK_PARAM_READABLE));
 574
 575   /**
 576    * GtkRange:trough-under-steppers:
 577    *
 578    * Whether to draw the trough across the full length of the range or
 579    * to exclude the steppers and their spacing.
 580    *
 581    * Since: 2.10
 582    */
 583   gtk_widget_class_install_style_property (widget_class,
 584                                            g_param_spec_boolean ("trough-under-steppers",
 585                                                                  P_("Trough Under Steppers"),
 586                                                                  P_("Whether to draw trough for full length of range or exclude the steppers and spacing"),
 587                                                                  TRUE,
 588                                                                  GTK_PARAM_READABLE));
 589
 590   /**
 591    * GtkRange:arrow-scaling:
 592    *
 593    * The arrow size proportion relative to the scroll button size.
 594    *
 595    * Since: 2.14
 596    */
 597   gtk_widget_class_install_style_property (widget_class,
 598                                            g_param_spec_float ("arrow-scaling",
 599                                                                P_("Arrow scaling"),
 600                                                                P_("Arrow scaling with regard to scroll button size"),
 601                                                                0.0, 1.0, 0.5,
 602                                                                GTK_PARAM_READABLE));
 603
 604   g_type_class_add_private (class, sizeof (GtkRangePrivate));
 605
 606   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_RANGE_ACCESSIBLE);
 607 }
 608
 609 static void
 610 gtk_range_set_property (GObject      *object,
 611                         guint         prop_id,
 612                         const GValue *value,
 613                         GParamSpec   *pspec)
 614 {
 615   GtkRange *range = GTK_RANGE (object);
 616   GtkRangePrivate *priv = range->priv;
 617
 618   switch (prop_id)
 619     {
 620     case PROP_ORIENTATION:
 621       priv->orientation = g_value_get_enum (value);
 622
 623       priv->slider_detail_quark = 0;
 624       priv->stepper_detail_quark[0] = 0;
 625       priv->stepper_detail_quark[1] = 0;
 626       priv->stepper_detail_quark[2] = 0;
 627       priv->stepper_detail_quark[3] = 0;
 628
 629       _gtk_orientable_set_style_classes (GTK_ORIENTABLE (range));
 630       gtk_widget_queue_resize (GTK_WIDGET (range));
 631       break;
 632     case PROP_ADJUSTMENT:
 633       gtk_range_set_adjustment (range, g_value_get_object (value));
 634       break;
 635     case PROP_INVERTED:
 636       gtk_range_set_inverted (range, g_value_get_boolean (value));
 637       break;
 638     case PROP_LOWER_STEPPER_SENSITIVITY:
 639       gtk_range_set_lower_stepper_sensitivity (range, g_value_get_enum (value));
 640       break;
 641     case PROP_UPPER_STEPPER_SENSITIVITY:
 642       gtk_range_set_upper_stepper_sensitivity (range, g_value_get_enum (value));
 643       break;
 644     case PROP_SHOW_FILL_LEVEL:
 645       gtk_range_set_show_fill_level (range, g_value_get_boolean (value));
 646       break;
 647     case PROP_RESTRICT_TO_FILL_LEVEL:
 648       gtk_range_set_restrict_to_fill_level (range, g_value_get_boolean (value));
 649       break;
 650     case PROP_FILL_LEVEL:
 651       gtk_range_set_fill_level (range, g_value_get_double (value));
 652       break;
 653     case PROP_ROUND_DIGITS:
 654       gtk_range_set_round_digits (range, g_value_get_int (value));
 655       break;
 656     default:
 657       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 658       break;
 659     }
 660 }
 661
 662 static void
 663 gtk_range_get_property (GObject      *object,
 664                         guint         prop_id,
 665                         GValue       *value,
 666                         GParamSpec   *pspec)
 667 {
 668   GtkRange *range = GTK_RANGE (object);
 669   GtkRangePrivate *priv = range->priv;
 670
 671   switch (prop_id)
 672     {
 673     case PROP_ORIENTATION:
 674       g_value_set_enum (value, priv->orientation);
 675       break;
 676     case PROP_ADJUSTMENT:
 677       g_value_set_object (value, priv->adjustment);
 678       break;
 679     case PROP_INVERTED:
 680       g_value_set_boolean (value, priv->inverted);
 681       break;
 682     case PROP_LOWER_STEPPER_SENSITIVITY:
 683       g_value_set_enum (value, gtk_range_get_lower_stepper_sensitivity (range));
 684       break;
 685     case PROP_UPPER_STEPPER_SENSITIVITY:
 686       g_value_set_enum (value, gtk_range_get_upper_stepper_sensitivity (range));
 687       break;
 688     case PROP_SHOW_FILL_LEVEL:
 689       g_value_set_boolean (value, gtk_range_get_show_fill_level (range));
 690       break;
 691     case PROP_RESTRICT_TO_FILL_LEVEL:
 692       g_value_set_boolean (value, gtk_range_get_restrict_to_fill_level (range));
 693       break;
 694     case PROP_FILL_LEVEL:
 695       g_value_set_double (value, gtk_range_get_fill_level (range));
 696       break;
 697     case PROP_ROUND_DIGITS:
 698       g_value_set_int (value, gtk_range_get_round_digits (range));
 699       break;
 700     default:
 701       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 702       break;
 703     }
 704 }
 705
 706 static void
 707 gtk_range_init (GtkRange *range)
 708 {
 709   GtkRangePrivate *priv;
 710
 711   range->priv = G_TYPE_INSTANCE_GET_PRIVATE (range,
 712                                              GTK_TYPE_RANGE,
 713                                              GtkRangePrivate);
 714   priv = range->priv;
 715
 716   gtk_widget_set_has_window (GTK_WIDGET (range), FALSE);
 717
 718   priv->orientation = GTK_ORIENTATION_HORIZONTAL;
 719   priv->adjustment = NULL;
 720   priv->inverted = FALSE;
 721   priv->flippable = FALSE;
 722   priv->min_slider_size = 1;
 723   priv->has_stepper_a = FALSE;
 724   priv->has_stepper_b = FALSE;
 725   priv->has_stepper_c = FALSE;
 726   priv->has_stepper_d = FALSE;
 727   priv->need_recalc = TRUE;
 728   priv->round_digits = -1;
 729   priv->mouse_location = MOUSE_OUTSIDE;
 730   priv->mouse_x = -1;
 731   priv->mouse_y = -1;
 732   priv->grab_location = MOUSE_OUTSIDE;
 733   priv->grab_button = 0;
 734   priv->lower_sensitivity = GTK_SENSITIVITY_AUTO;
 735   priv->upper_sensitivity = GTK_SENSITIVITY_AUTO;
 736   priv->lower_sensitive = TRUE;
 737   priv->upper_sensitive = TRUE;
 738   priv->show_fill_level = FALSE;
 739   priv->restrict_to_fill_level = TRUE;
 740   priv->fill_level = G_MAXDOUBLE;
 741   priv->timer = NULL;
 742 }
 743
 744 /**
 745  * gtk_range_get_adjustment:
 746  * @range: a #GtkRange
 747  *
 748  * Get the #GtkAdjustment which is the "model" object for #GtkRange.
 749  * See gtk_range_set_adjustment() for details.
 750  * The return value does not have a reference added, so should not
 751  * be unreferenced.
 752  *
 753  * Return value: (transfer none): a #GtkAdjustment
 754  **/
 755 GtkAdjustment*
 756 gtk_range_get_adjustment (GtkRange *range)
 757 {
 758   GtkRangePrivate *priv;
 759
 760   g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
 761
 762   priv = range->priv;
 763
 764   if (!priv->adjustment)
 765     gtk_range_set_adjustment (range, NULL);
 766
 767   return priv->adjustment;
 768 }
 769
 770 /**
 771  * gtk_range_set_adjustment:
 772  * @range: a #GtkRange
 773  * @adjustment: a #GtkAdjustment
 774  *
 775  * Sets the adjustment to be used as the "model" object for this range
 776  * widget. The adjustment indicates the current range value, the
 777  * minimum and maximum range values, the step/page increments used
 778  * for keybindings and scrolling, and the page size. The page size
 779  * is normally 0 for #GtkScale and nonzero for #GtkScrollbar, and
 780  * indicates the size of the visible area of the widget being scrolled.
 781  * The page size affects the size of the scrollbar slider.
 782  **/
 783 void
 784 gtk_range_set_adjustment (GtkRange      *range,
 785                           GtkAdjustment *adjustment)
 786 {
 787   GtkRangePrivate *priv;
 788
 789   g_return_if_fail (GTK_IS_RANGE (range));
 790
 791   priv = range->priv;
 792
 793   if (!adjustment)
 794     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 795   else
 796     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 797
 798   if (priv->adjustment != adjustment)
 799     {
 800       if (priv->adjustment)
 801         {
 802           g_signal_handlers_disconnect_by_func (priv->adjustment,
 803                                                 gtk_range_adjustment_changed,
 804                                                 range);
 805           g_signal_handlers_disconnect_by_func (priv->adjustment,
 806                                                 gtk_range_adjustment_value_changed,
 807                                                 range);
 808           g_object_unref (priv->adjustment);
 809         }
 810
 811       priv->adjustment = adjustment;
 812       g_object_ref_sink (adjustment);
 813
 814       g_signal_connect (adjustment, "changed",
 815                         G_CALLBACK (gtk_range_adjustment_changed),
 816                         range);
 817       g_signal_connect (adjustment, "value-changed",
 818                         G_CALLBACK (gtk_range_adjustment_value_changed),
 819                         range);
 820
 821       gtk_range_adjustment_changed (adjustment, range);
 822       g_object_notify (G_OBJECT (range), "adjustment");
 823     }
 824 }
 825
 826 /**
 827  * gtk_range_set_inverted:
 828  * @range: a #GtkRange
 829  * @setting: %TRUE to invert the range
 830  *
 831  * Ranges normally move from lower to higher values as the
 832  * slider moves from top to bottom or left to right. Inverted
 833  * ranges have higher values at the top or on the right rather than
 834  * on the bottom or left.
 835  **/
 836 void
 837 gtk_range_set_inverted (GtkRange *range,
 838                         gboolean  setting)
 839 {
 840   GtkRangePrivate *priv;
 841
 842   g_return_if_fail (GTK_IS_RANGE (range));
 843
 844   priv = range->priv;
 845
 846   setting = setting != FALSE;
 847
 848   if (setting != priv->inverted)
 849     {
 850       priv->inverted = setting;
 851       g_object_notify (G_OBJECT (range), "inverted");
 852       gtk_widget_queue_resize (GTK_WIDGET (range));
 853     }
 854 }
 855
 856 /**
 857  * gtk_range_get_inverted:
 858  * @range: a #GtkRange
 859  *
 860  * Gets the value set by gtk_range_set_inverted().
 861  *
 862  * Return value: %TRUE if the range is inverted
 863  **/
 864 gboolean
 865 gtk_range_get_inverted (GtkRange *range)
 866 {
 867   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 868
 869   return range->priv->inverted;
 870 }
 871
 872 /**
 873  * gtk_range_set_flippable:
 874  * @range: a #GtkRange
 875  * @flippable: %TRUE to make the range flippable
 876  *
 877  * If a range is flippable, it will switch its direction if it is
 878  * horizontal and its direction is %GTK_TEXT_DIR_RTL.
 879  *
 880  * See gtk_widget_get_direction().
 881  *
 882  * Since: 2.18
 883  **/
 884 void
 885 gtk_range_set_flippable (GtkRange *range,
 886                          gboolean  flippable)
 887 {
 888   GtkRangePrivate *priv;
 889
 890   g_return_if_fail (GTK_IS_RANGE (range));
 891
 892   priv = range->priv;
 893
 894   flippable = flippable ? TRUE : FALSE;
 895
 896   if (flippable != priv->flippable)
 897     {
 898       priv->flippable = flippable;
 899
 900       gtk_widget_queue_draw (GTK_WIDGET (range));
 901     }
 902 }
 903
 904 /**
 905  * gtk_range_get_flippable:
 906  * @range: a #GtkRange
 907  *
 908  * Gets the value set by gtk_range_set_flippable().
 909  *
 910  * Return value: %TRUE if the range is flippable
 911  *
 912  * Since: 2.18
 913  **/
 914 gboolean
 915 gtk_range_get_flippable (GtkRange *range)
 916 {
 917   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 918
 919   return range->priv->flippable;
 920 }
 921
 922 /**
 923  * gtk_range_set_slider_size_fixed:
 924  * @range: a #GtkRange
 925  * @size_fixed: %TRUE to make the slider size constant
 926  *
 927  * Sets whether the range's slider has a fixed size, or a size that
 928  * depends on its adjustment's page size.
 929  *
 930  * This function is useful mainly for #GtkRange subclasses.
 931  *
 932  * Since: 2.20
 933  **/
 934 void
 935 gtk_range_set_slider_size_fixed (GtkRange *range,
 936                                  gboolean  size_fixed)
 937 {
 938   GtkRangePrivate *priv;
 939
 940   g_return_if_fail (GTK_IS_RANGE (range));
 941
 942   priv = range->priv;
 943
 944   if (size_fixed != priv->slider_size_fixed)
 945     {
 946       priv->slider_size_fixed = size_fixed ? TRUE : FALSE;
 947
 948       if (priv->adjustment && gtk_widget_get_mapped (GTK_WIDGET (range)))
 949         {
 950           priv->need_recalc = TRUE;
 951           gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
 952           gtk_widget_queue_draw (GTK_WIDGET (range));
 953         }
 954     }
 955 }
 956
 957 /**
 958  * gtk_range_get_slider_size_fixed:
 959  * @range: a #GtkRange
 960  *
 961  * This function is useful mainly for #GtkRange subclasses.
 962  *
 963  * See gtk_range_set_slider_size_fixed().
 964  *
 965  * Return value: whether the range's slider has a fixed size.
 966  *
 967  * Since: 2.20
 968  **/
 969 gboolean
 970 gtk_range_get_slider_size_fixed (GtkRange *range)
 971 {
 972   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 973
 974   return range->priv->slider_size_fixed;
 975 }
 976
 977 /**
 978  * gtk_range_set_min_slider_size:
 979  * @range: a #GtkRange
 980  * @min_size: The slider's minimum size
 981  *
 982  * Sets the minimum size of the range's slider.
 983  *
 984  * This function is useful mainly for #GtkRange subclasses.
 985  *
 986  * Since: 2.20
 987  **/
 988 void
 989 gtk_range_set_min_slider_size (GtkRange *range,
 990                                gint      min_size)
 991 {
 992   GtkRangePrivate *priv;
 993
 994   g_return_if_fail (GTK_IS_RANGE (range));
 995   g_return_if_fail (min_size > 0);
 996
 997   priv = range->priv;
 998
 999   if (min_size != priv->min_slider_size)
1000     {
1001       priv->min_slider_size = min_size;
1002
1003       if (gtk_widget_is_drawable (GTK_WIDGET (range)))
1004         {
1005           priv->need_recalc = TRUE;
1006           gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1007           gtk_widget_queue_draw (GTK_WIDGET (range));
1008         }
1009     }
1010 }
1011
1012 /**
1013  * gtk_range_get_min_slider_size:
1014  * @range: a #GtkRange
1015  *
1016  * This function is useful mainly for #GtkRange subclasses.
1017  *
1018  * See gtk_range_set_min_slider_size().
1019  *
1020  * Return value: The minimum size of the range's slider.
1021  *
1022  * Since: 2.20
1023  **/
1024 gint
1025 gtk_range_get_min_slider_size (GtkRange *range)
1026 {
1027   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1028
1029   return range->priv->min_slider_size;
1030 }
1031
1032 /**
1033  * gtk_range_get_range_rect:
1034  * @range: a #GtkRange
1035  * @range_rect: (out): return location for the range rectangle
1036  *
1037  * This function returns the area that contains the range's trough
1038  * and its steppers, in widget->window coordinates.
1039  *
1040  * This function is useful mainly for #GtkRange subclasses.
1041  *
1042  * Since: 2.20
1043  **/
1044 void
1045 gtk_range_get_range_rect (GtkRange     *range,
1046                           GdkRectangle *range_rect)
1047 {
1048   GtkRangePrivate *priv;
1049
1050   g_return_if_fail (GTK_IS_RANGE (range));
1051   g_return_if_fail (range_rect != NULL);
1052
1053   priv = range->priv;
1054
1055   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1056
1057   *range_rect = priv->range_rect;
1058 }
1059
1060 /**
1061  * gtk_range_get_slider_range:
1062  * @range: a #GtkRange
1063  * @slider_start: (out) (allow-none): return location for the slider's
1064  *     start, or %NULL
1065  * @slider_end: (out) (allow-none): return location for the slider's
1066  *     end, or %NULL
1067  *
1068  * This function returns sliders range along the long dimension,
1069  * in widget->window coordinates.
1070  *
1071  * This function is useful mainly for #GtkRange subclasses.
1072  *
1073  * Since: 2.20
1074  **/
1075 void
1076 gtk_range_get_slider_range (GtkRange *range,
1077                             gint     *slider_start,
1078                             gint     *slider_end)
1079 {
1080   GtkRangePrivate *priv;
1081
1082   g_return_if_fail (GTK_IS_RANGE (range));
1083
1084   priv = range->priv;
1085
1086   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1087
1088   if (slider_start)
1089     *slider_start = priv->slider_start;
1090
1091   if (slider_end)
1092     *slider_end = priv->slider_end;
1093 }
1094
1095 /**
1096  * gtk_range_set_lower_stepper_sensitivity:
1097  * @range:       a #GtkRange
1098  * @sensitivity: the lower stepper's sensitivity policy.
1099  *
1100  * Sets the sensitivity policy for the stepper that points to the
1101  * 'lower' end of the GtkRange's adjustment.
1102  *
1103  * Since: 2.10
1104  **/
1105 void
1106 gtk_range_set_lower_stepper_sensitivity (GtkRange           *range,
1107                                          GtkSensitivityType  sensitivity)
1108 {
1109   GtkRangePrivate *priv;
1110
1111   g_return_if_fail (GTK_IS_RANGE (range));
1112
1113   priv = range->priv;
1114
1115   if (priv->lower_sensitivity != sensitivity)
1116     {
1117       priv->lower_sensitivity = sensitivity;
1118
1119       priv->need_recalc = TRUE;
1120       gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1121       gtk_widget_queue_draw (GTK_WIDGET (range));
1122
1123       g_object_notify (G_OBJECT (range), "lower-stepper-sensitivity");
1124     }
1125 }
1126
1127 /**
1128  * gtk_range_get_lower_stepper_sensitivity:
1129  * @range: a #GtkRange
1130  *
1131  * Gets the sensitivity policy for the stepper that points to the
1132  * 'lower' end of the GtkRange's adjustment.
1133  *
1134  * Return value: The lower stepper's sensitivity policy.
1135  *
1136  * Since: 2.10
1137  **/
1138 GtkSensitivityType
1139 gtk_range_get_lower_stepper_sensitivity (GtkRange *range)
1140 {
1141   g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
1142
1143   return range->priv->lower_sensitivity;
1144 }
1145
1146 /**
1147  * gtk_range_set_upper_stepper_sensitivity:
1148  * @range:       a #GtkRange
1149  * @sensitivity: the upper stepper's sensitivity policy.
1150  *
1151  * Sets the sensitivity policy for the stepper that points to the
1152  * 'upper' end of the GtkRange's adjustment.
1153  *
1154  * Since: 2.10
1155  **/
1156 void
1157 gtk_range_set_upper_stepper_sensitivity (GtkRange           *range,
1158                                          GtkSensitivityType  sensitivity)
1159 {
1160   GtkRangePrivate *priv;
1161
1162   g_return_if_fail (GTK_IS_RANGE (range));
1163
1164   priv = range->priv;
1165
1166   if (priv->upper_sensitivity != sensitivity)
1167     {
1168       priv->upper_sensitivity = sensitivity;
1169
1170       priv->need_recalc = TRUE;
1171       gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1172       gtk_widget_queue_draw (GTK_WIDGET (range));
1173
1174       g_object_notify (G_OBJECT (range), "upper-stepper-sensitivity");
1175     }
1176 }
1177
1178 /**
1179  * gtk_range_get_upper_stepper_sensitivity:
1180  * @range: a #GtkRange
1181  *
1182  * Gets the sensitivity policy for the stepper that points to the
1183  * 'upper' end of the GtkRange's adjustment.
1184  *
1185  * Return value: The upper stepper's sensitivity policy.
1186  *
1187  * Since: 2.10
1188  **/
1189 GtkSensitivityType
1190 gtk_range_get_upper_stepper_sensitivity (GtkRange *range)
1191 {
1192   g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
1193
1194   return range->priv->upper_sensitivity;
1195 }
1196
1197 /**
1198  * gtk_range_set_increments:
1199  * @range: a #GtkRange
1200  * @step: step size
1201  * @page: page size
1202  *
1203  * Sets the step and page sizes for the range.
1204  * The step size is used when the user clicks the #GtkScrollbar
1205  * arrows or moves #GtkScale via arrow keys. The page size
1206  * is used for example when moving via Page Up or Page Down keys.
1207  **/
1208 void
1209 gtk_range_set_increments (GtkRange *range,
1210                           gdouble   step,
1211                           gdouble   page)
1212 {
1213   GtkAdjustment *adjustment;
1214
1215   g_return_if_fail (GTK_IS_RANGE (range));
1216
1217   adjustment = range->priv->adjustment;
1218
1219   gtk_adjustment_configure (adjustment,
1220                             gtk_adjustment_get_value (adjustment),
1221                             gtk_adjustment_get_lower (adjustment),
1222                             gtk_adjustment_get_upper (adjustment),
1223                             step,
1224                             page,
1225                             gtk_adjustment_get_page_size (adjustment));
1226 }
1227
1228 /**
1229  * gtk_range_set_range:
1230  * @range: a #GtkRange
1231  * @min: minimum range value
1232  * @max: maximum range value
1233  *
1234  * Sets the allowable values in the #GtkRange, and clamps the range
1235  * value to be between @min and @max. (If the range has a non-zero
1236  * page size, it is clamped between @min and @max - page-size.)
1237  **/
1238 void
1239 gtk_range_set_range (GtkRange *range,
1240                      gdouble   min,
1241                      gdouble   max)
1242 {
1243   GtkRangePrivate *priv;
1244   GtkAdjustment *adjustment;
1245   gdouble value;
1246
1247   g_return_if_fail (GTK_IS_RANGE (range));
1248   g_return_if_fail (min <= max);
1249
1250   priv = range->priv;
1251   adjustment = priv->adjustment;
1252
1253   value = gtk_adjustment_get_value (adjustment);
1254   if (priv->restrict_to_fill_level)
1255     value = MIN (value, MAX (gtk_adjustment_get_lower (adjustment),
1256                              priv->fill_level));
1257
1258   gtk_adjustment_configure (adjustment,
1259                             value,
1260                             min,
1261                             max,
1262                             gtk_adjustment_get_step_increment (adjustment),
1263                             gtk_adjustment_get_page_increment (adjustment),
1264                             gtk_adjustment_get_page_size (adjustment));
1265 }
1266
1267 /**
1268  * gtk_range_set_value:
1269  * @range: a #GtkRange
1270  * @value: new value of the range
1271  *
1272  * Sets the current value of the range; if the value is outside the
1273  * minimum or maximum range values, it will be clamped to fit inside
1274  * them. The range emits the #GtkRange::value-changed signal if the
1275  * value changes.
1276  **/
1277 void
1278 gtk_range_set_value (GtkRange *range,
1279                      gdouble   value)
1280 {
1281   GtkRangePrivate *priv;
1282
1283   g_return_if_fail (GTK_IS_RANGE (range));
1284
1285   priv = range->priv;
1286
1287   if (priv->restrict_to_fill_level)
1288     value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment),
1289                              priv->fill_level));
1290
1291   gtk_adjustment_set_value (priv->adjustment, value);
1292 }
1293
1294 /**
1295  * gtk_range_get_value:
1296  * @range: a #GtkRange
1297  *
1298  * Gets the current value of the range.
1299  *
1300  * Return value: current value of the range.
1301  **/
1302 gdouble
1303 gtk_range_get_value (GtkRange *range)
1304 {
1305   g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
1306
1307   return gtk_adjustment_get_value (range->priv->adjustment);
1308 }
1309
1310 /**
1311  * gtk_range_set_show_fill_level:
1312  * @range:           A #GtkRange
1313  * @show_fill_level: Whether a fill level indicator graphics is shown.
1314  *
1315  * Sets whether a graphical fill level is show on the trough. See
1316  * gtk_range_set_fill_level() for a general description of the fill
1317  * level concept.
1318  *
1319  * Since: 2.12
1320  **/
1321 void
1322 gtk_range_set_show_fill_level (GtkRange *range,
1323                                gboolean  show_fill_level)
1324 {
1325   GtkRangePrivate *priv;
1326
1327   g_return_if_fail (GTK_IS_RANGE (range));
1328
1329   priv = range->priv;
1330
1331   show_fill_level = show_fill_level ? TRUE : FALSE;
1332
1333   if (show_fill_level != priv->show_fill_level)
1334     {
1335       priv->show_fill_level = show_fill_level;
1336       g_object_notify (G_OBJECT (range), "show-fill-level");
1337       gtk_widget_queue_draw (GTK_WIDGET (range));
1338     }
1339 }
1340
1341 /**
1342  * gtk_range_get_show_fill_level:
1343  * @range: A #GtkRange
1344  *
1345  * Gets whether the range displays the fill level graphically.
1346  *
1347  * Return value: %TRUE if @range shows the fill level.
1348  *
1349  * Since: 2.12
1350  **/
1351 gboolean
1352 gtk_range_get_show_fill_level (GtkRange *range)
1353 {
1354   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1355
1356   return range->priv->show_fill_level;
1357 }
1358
1359 /**
1360  * gtk_range_set_restrict_to_fill_level:
1361  * @range:                  A #GtkRange
1362  * @restrict_to_fill_level: Whether the fill level restricts slider movement.
1363  *
1364  * Sets whether the slider is restricted to the fill level. See
1365  * gtk_range_set_fill_level() for a general description of the fill
1366  * level concept.
1367  *
1368  * Since: 2.12
1369  **/
1370 void
1371 gtk_range_set_restrict_to_fill_level (GtkRange *range,
1372                                       gboolean  restrict_to_fill_level)
1373 {
1374   GtkRangePrivate *priv;
1375
1376   g_return_if_fail (GTK_IS_RANGE (range));
1377
1378   priv = range->priv;
1379
1380   restrict_to_fill_level = restrict_to_fill_level ? TRUE : FALSE;
1381
1382   if (restrict_to_fill_level != priv->restrict_to_fill_level)
1383     {
1384       priv->restrict_to_fill_level = restrict_to_fill_level;
1385       g_object_notify (G_OBJECT (range), "restrict-to-fill-level");
1386
1387       gtk_range_set_value (range, gtk_range_get_value (range));
1388     }
1389 }
1390
1391 /**
1392  * gtk_range_get_restrict_to_fill_level:
1393  * @range: A #GtkRange
1394  *
1395  * Gets whether the range is restricted to the fill level.
1396  *
1397  * Return value: %TRUE if @range is restricted to the fill level.
1398  *
1399  * Since: 2.12
1400  **/
1401 gboolean
1402 gtk_range_get_restrict_to_fill_level (GtkRange *range)
1403 {
1404   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1405
1406   return range->priv->restrict_to_fill_level;
1407 }
1408
1409 /**
1410  * gtk_range_set_fill_level:
1411  * @range: a #GtkRange
1412  * @fill_level: the new position of the fill level indicator
1413  *
1414  * Set the new position of the fill level indicator.
1415  *
1416  * The "fill level" is probably best described by its most prominent
1417  * use case, which is an indicator for the amount of pre-buffering in
1418  * a streaming media player. In that use case, the value of the range
1419  * would indicate the current play position, and the fill level would
1420  * be the position up to which the file/stream has been downloaded.
1421  *
1422  * This amount of prebuffering can be displayed on the range's trough
1423  * and is themeable separately from the trough. To enable fill level
1424  * display, use gtk_range_set_show_fill_level(). The range defaults
1425  * to not showing the fill level.
1426  *
1427  * Additionally, it's possible to restrict the range's slider position
1428  * to values which are smaller than the fill level. This is controller
1429  * by gtk_range_set_restrict_to_fill_level() and is by default
1430  * enabled.
1431  *
1432  * Since: 2.12
1433  **/
1434 void
1435 gtk_range_set_fill_level (GtkRange *range,
1436                           gdouble   fill_level)
1437 {
1438   GtkRangePrivate *priv;
1439
1440   g_return_if_fail (GTK_IS_RANGE (range));
1441
1442   priv = range->priv;
1443
1444   if (fill_level != priv->fill_level)
1445     {
1446       priv->fill_level = fill_level;
1447       g_object_notify (G_OBJECT (range), "fill-level");
1448
1449       if (priv->show_fill_level)
1450         gtk_widget_queue_draw (GTK_WIDGET (range));
1451
1452       if (priv->restrict_to_fill_level)
1453         gtk_range_set_value (range, gtk_range_get_value (range));
1454     }
1455 }
1456
1457 /**
1458  * gtk_range_get_fill_level:
1459  * @range: A #GtkRange
1460  *
1461  * Gets the current position of the fill level indicator.
1462  *
1463  * Return value: The current fill level
1464  *
1465  * Since: 2.12
1466  **/
1467 gdouble
1468 gtk_range_get_fill_level (GtkRange *range)
1469 {
1470   g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
1471
1472   return range->priv->fill_level;
1473 }
1474
1475 static gboolean
1476 should_invert (GtkRange *range)
1477 {
1478   GtkRangePrivate *priv = range->priv;
1479
1480   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1481     return
1482       (priv->inverted && !priv->flippable) ||
1483       (priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) ||
1484       (!priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
1485   else
1486     return priv->inverted;
1487 }
1488
1489 static void
1490 gtk_range_destroy (GtkWidget *widget)
1491 {
1492   GtkRange *range = GTK_RANGE (widget);
1493   GtkRangePrivate *priv = range->priv;
1494
1495   gtk_range_remove_step_timer (range);
1496
1497   if (priv->repaint_id)
1498     g_source_remove (priv->repaint_id);
1499   priv->repaint_id = 0;
1500
1501   if (priv->adjustment)
1502     {
1503       g_signal_handlers_disconnect_by_func (priv->adjustment,
1504                                             gtk_range_adjustment_changed,
1505                                             range);
1506       g_signal_handlers_disconnect_by_func (priv->adjustment,
1507                                             gtk_range_adjustment_value_changed,
1508                                             range);
1509       g_object_unref (priv->adjustment);
1510       priv->adjustment = NULL;
1511     }
1512
1513   if (priv->n_marks)
1514     {
1515       g_free (priv->marks);
1516       priv->marks = NULL;
1517       g_free (priv->mark_pos);
1518       priv->mark_pos = NULL;
1519       priv->n_marks = 0;
1520     }
1521
1522   GTK_WIDGET_CLASS (gtk_range_parent_class)->destroy (widget);
1523 }
1524
1525 static void
1526 gtk_range_get_preferred_width (GtkWidget *widget,
1527                                gint      *minimum,
1528                                gint      *natural)
1529 {
1530   GtkRange *range;
1531   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
1532   GdkRectangle range_rect;
1533   GtkBorder border;
1534
1535   range = GTK_RANGE (widget);
1536
1537   gtk_range_get_props (range,
1538                        &slider_width, &stepper_size,
1539                        &focus_width, &trough_border,
1540                        &stepper_spacing, NULL,
1541                        NULL, NULL);
1542
1543   gtk_range_calc_request (range,
1544                           slider_width, stepper_size,
1545                           focus_width, trough_border, stepper_spacing,
1546                           &range_rect, &border, NULL, NULL, NULL, NULL);
1547
1548   *minimum = *natural = range_rect.width + border.left + border.right;
1549 }
1550
1551 static void
1552 gtk_range_get_preferred_height (GtkWidget *widget,
1553                                 gint      *minimum,
1554                                 gint      *natural)
1555 {
1556   GtkRange *range;
1557   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
1558   GdkRectangle range_rect;
1559   GtkBorder border;
1560
1561   range = GTK_RANGE (widget);
1562
1563   gtk_range_get_props (range,
1564                        &slider_width, &stepper_size,
1565                        &focus_width, &trough_border,
1566                        &stepper_spacing, NULL,
1567                        NULL, NULL);
1568
1569   gtk_range_calc_request (range,
1570                           slider_width, stepper_size,
1571                           focus_width, trough_border, stepper_spacing,
1572                           &range_rect, &border, NULL, NULL, NULL, NULL);
1573
1574   *minimum = *natural = range_rect.height + border.top + border.bottom;
1575 }
1576
1577 static gboolean
1578 modify_allocation_for_window_grip (GtkWidget     *widget,
1579                                    GtkAllocation *allocation)
1580 {
1581   GtkRange *range = GTK_RANGE (widget);
1582   GtkRangePrivate *priv = range->priv;
1583   GtkWidget *window, *parent;
1584   GdkRectangle grip_rect;
1585   GdkRectangle translated_rect;
1586   gint x;
1587   gint y;
1588
1589   window = gtk_widget_get_toplevel (widget);
1590   if (!GTK_IS_WINDOW (window))
1591     return FALSE;
1592
1593   if (!gtk_window_resize_grip_is_visible (GTK_WINDOW (window)))
1594     return FALSE;
1595
1596   /* Get the area of the window's corner grip */
1597   gtk_window_get_resize_grip_area (GTK_WINDOW (window), &grip_rect);
1598
1599   x = 0;
1600   y = 0;
1601
1602   /* Translate the stepper's area into window coords.
1603    * This is slightly tricky. We can't just use
1604    * gtk_widget_translate_coordinates (widget, window, 0, 0, &x, &y)
1605    * since that translates wrt to the _current_ allocation
1606    * and will lead to alternating between overlap and nonoverlap
1607    * for successive allocations.
1608    * Therefore, we find the window-widget to whose window allocation
1609    * is relative, and translate from there upwards.
1610    */
1611   parent = widget;
1612   while (gtk_widget_get_window (parent) == gtk_widget_get_window (widget) &&
1613          parent != window)
1614     {
1615       parent = gtk_widget_get_parent (parent);
1616     }
1617
1618   if (parent == window)
1619     translated_rect = *allocation;
1620   else
1621     {
1622       gtk_widget_translate_coordinates (parent,
1623                                         window,
1624                                         allocation->x, allocation->y,
1625                                         &x, &y);
1626       translated_rect.x = x;
1627       translated_rect.y = y;
1628       translated_rect.width = allocation->width;
1629       translated_rect.height = allocation->height;
1630     }
1631
1632   /* If the stepper button intersects the window resize grip.. */
1633   if (gdk_rectangle_intersect (&grip_rect, &translated_rect, NULL))
1634     {
1635       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1636         {
1637           allocation->width -= grip_rect.width;
1638           if (gtk_widget_get_direction (window) == GTK_TEXT_DIR_RTL)
1639             allocation->x += grip_rect.width;
1640         }
1641       else
1642         {
1643           allocation->height -= grip_rect.height;
1644         }
1645
1646       return TRUE;
1647     }
1648
1649   return FALSE;
1650 }
1651
1652 static void
1653 gtk_range_size_allocate (GtkWidget     *widget,
1654                          GtkAllocation *allocation)
1655 {
1656   GtkRange *range = GTK_RANGE (widget);
1657   GtkRangePrivate *priv = range->priv;
1658
1659   modify_allocation_for_window_grip (widget, allocation);
1660   gtk_widget_set_allocation (widget, allocation);
1661
1662   priv->recalc_marks = TRUE;
1663
1664   priv->need_recalc = TRUE;
1665   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1666
1667   if (gtk_widget_get_realized (widget))
1668     gdk_window_move_resize (priv->event_window,
1669                             allocation->x, allocation->y,
1670                             allocation->width, allocation->height);
1671 }
1672
1673 static void
1674 resize_grip_visible_changed (GObject    *object,
1675                              GParamSpec *pspec,
1676                              gpointer    user_data)
1677 {
1678   gtk_widget_queue_resize (GTK_WIDGET (user_data));
1679 }
1680
1681 static void
1682 gtk_range_hierarchy_changed (GtkWidget *widget,
1683                              GtkWidget *previous_toplevel)
1684 {
1685   GtkWidget *window;
1686
1687   if (previous_toplevel)
1688     g_signal_handlers_disconnect_by_func (previous_toplevel,
1689                                           G_CALLBACK (resize_grip_visible_changed),
1690                                           widget);
1691   window = gtk_widget_get_toplevel (widget);
1692   if (gtk_widget_is_toplevel (window))
1693     g_signal_connect (window, "notify::resize-grip-visible",
1694                       G_CALLBACK (resize_grip_visible_changed), widget);
1695 }
1696
1697 static void
1698 gtk_range_realize (GtkWidget *widget)
1699 {
1700   GtkAllocation allocation;
1701   GtkRange *range = GTK_RANGE (widget);
1702   GtkRangePrivate *priv = range->priv;
1703   GdkWindow *window;
1704   GdkWindowAttr attributes;
1705   gint attributes_mask;
1706
1707   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1708
1709   gtk_widget_set_realized (widget, TRUE);
1710
1711   window = gtk_widget_get_parent_window (widget);
1712   gtk_widget_set_window (widget, window);
1713   g_object_ref (window);
1714
1715   gtk_widget_get_allocation (widget, &allocation);
1716   if (modify_allocation_for_window_grip (widget, &allocation))
1717     gtk_widget_set_allocation (widget, &allocation);
1718
1719   attributes.window_type = GDK_WINDOW_CHILD;
1720   attributes.x = allocation.x;
1721   attributes.y = allocation.y;
1722   attributes.width = allocation.width;
1723   attributes.height = allocation.height;
1724   attributes.wclass = GDK_INPUT_ONLY;
1725   attributes.event_mask = gtk_widget_get_events (widget);
1726   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
1727                             GDK_BUTTON_RELEASE_MASK |
1728                             GDK_ENTER_NOTIFY_MASK |
1729                             GDK_LEAVE_NOTIFY_MASK |
1730                             GDK_POINTER_MOTION_MASK |
1731                             GDK_POINTER_MOTION_HINT_MASK);
1732
1733   attributes_mask = GDK_WA_X | GDK_WA_Y;
1734
1735   priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
1736                                         &attributes, attributes_mask);
1737   gdk_window_set_user_data (priv->event_window, range);
1738 }
1739
1740 static void
1741 gtk_range_unrealize (GtkWidget *widget)
1742 {
1743   GtkRange *range = GTK_RANGE (widget);
1744   GtkRangePrivate *priv = range->priv;
1745
1746   gtk_range_remove_step_timer (range);
1747
1748   gdk_window_set_user_data (priv->event_window, NULL);
1749   gdk_window_destroy (priv->event_window);
1750   priv->event_window = NULL;
1751
1752   GTK_WIDGET_CLASS (gtk_range_parent_class)->unrealize (widget);
1753 }
1754
1755 static void
1756 gtk_range_map (GtkWidget *widget)
1757 {
1758   GtkRange *range = GTK_RANGE (widget);
1759   GtkRangePrivate *priv = range->priv;
1760
1761   gdk_window_show (priv->event_window);
1762
1763   GTK_WIDGET_CLASS (gtk_range_parent_class)->map (widget);
1764 }
1765
1766 static void
1767 gtk_range_unmap (GtkWidget *widget)
1768 {
1769   GtkRange *range = GTK_RANGE (widget);
1770   GtkRangePrivate *priv = range->priv;
1771
1772   stop_scrolling (range);
1773
1774   gdk_window_hide (priv->event_window);
1775
1776   GTK_WIDGET_CLASS (gtk_range_parent_class)->unmap (widget);
1777 }
1778
1779 static void
1780 _gtk_range_update_context_for_stepper (GtkRange        *range,
1781                                        GtkStyleContext *context,
1782                                        Stepper          stepper)
1783 {
1784   GtkRangePrivate *priv = range->priv;
1785   GtkJunctionSides sides = 0;
1786   gboolean vertical, is_rtl;
1787
1788   vertical = (priv->orientation == GTK_ORIENTATION_VERTICAL);
1789   is_rtl = (gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
1790
1791   /* Take junction sides from what's been
1792    * previously set to the widget itself
1793    */
1794   sides = gtk_style_context_get_junction_sides (context);
1795
1796   if (vertical)
1797     sides &= ~(GTK_JUNCTION_TOP | GTK_JUNCTION_BOTTOM);
1798   else
1799     sides &= ~(GTK_JUNCTION_LEFT | GTK_JUNCTION_RIGHT);
1800
1801   switch (stepper)
1802     {
1803     case STEPPER_A:
1804       if (vertical)
1805         sides |= GTK_JUNCTION_BOTTOM;
1806       else
1807         sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1808       break;
1809     case STEPPER_B:
1810       if (priv->has_stepper_a)
1811         {
1812           if (vertical)
1813             sides |= GTK_JUNCTION_TOP;
1814           else
1815             sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1816         }
1817
1818       if (vertical)
1819         sides |= GTK_JUNCTION_BOTTOM;
1820       else
1821         sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1822       break;
1823     case STEPPER_C:
1824       if (priv->has_stepper_d)
1825         {
1826           if (vertical)
1827             sides |= GTK_JUNCTION_BOTTOM;
1828           else
1829             sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1830         }
1831
1832       if (vertical)
1833         sides |= GTK_JUNCTION_TOP;
1834       else
1835         sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1836       break;
1837     case STEPPER_D:
1838       if (vertical)
1839         sides |= GTK_JUNCTION_TOP;
1840       else
1841         sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1842       break;
1843     }
1844
1845   gtk_style_context_set_junction_sides (context, sides);
1846 }
1847
1848 static void
1849 draw_stepper (GtkRange     *range,
1850               Stepper       stepper,
1851               cairo_t      *cr,
1852               GtkArrowType  arrow_type,
1853               gboolean      clicked,
1854               gboolean      prelighted)
1855 {
1856   GtkRangePrivate *priv = range->priv;
1857   GtkAllocation allocation;
1858   GtkStateFlags state = 0;
1859   GtkStyleContext *context;
1860   GtkWidget *widget = GTK_WIDGET (range);
1861   gfloat arrow_scaling;
1862   GdkRectangle *rect;
1863   gdouble arrow_x;
1864   gdouble arrow_y;
1865   gdouble arrow_size, angle;
1866   gboolean arrow_sensitive;
1867
1868   switch (stepper)
1869     {
1870     case STEPPER_A:
1871       rect = &priv->stepper_a;
1872       break;
1873     case STEPPER_B:
1874       rect = &priv->stepper_b;
1875       break;
1876     case STEPPER_C:
1877       rect = &priv->stepper_c;
1878       break;
1879     case STEPPER_D:
1880       rect = &priv->stepper_d;
1881       break;
1882     default:
1883       g_assert_not_reached ();
1884     };
1885
1886   arrow_sensitive = TRUE;
1887
1888   gtk_widget_get_allocation (widget, &allocation);
1889
1890   if ((!priv->inverted && (arrow_type == GTK_ARROW_DOWN ||
1891                             arrow_type == GTK_ARROW_RIGHT)) ||
1892       (priv->inverted  && (arrow_type == GTK_ARROW_UP ||
1893                             arrow_type == GTK_ARROW_LEFT)))
1894     {
1895       arrow_sensitive = priv->upper_sensitive;
1896     }
1897   else
1898     {
1899       arrow_sensitive = priv->lower_sensitive;
1900     }
1901
1902   if (!gtk_widget_is_sensitive (GTK_WIDGET (range)) || !arrow_sensitive)
1903     state = GTK_STATE_FLAG_INSENSITIVE;
1904   else
1905     {
1906       if (clicked)
1907         state |= GTK_STATE_FLAG_ACTIVE;
1908       if (prelighted)
1909         state |= GTK_STATE_FLAG_PRELIGHT;
1910     }
1911
1912   context = gtk_widget_get_style_context (widget);
1913
1914   gtk_style_context_save (context);
1915
1916   /* don't set juction sides on scrollbar steppers */
1917   if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_SCROLLBAR))
1918     gtk_style_context_set_junction_sides (context, GTK_JUNCTION_NONE);
1919   else
1920     _gtk_range_update_context_for_stepper (range, context, stepper);
1921
1922   gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
1923   gtk_style_context_set_state (context, state);
1924
1925   gtk_render_background (context, cr,
1926                          rect->x, rect->y,
1927                          rect->width, rect->height);
1928   gtk_render_frame (context, cr,
1929                     rect->x, rect->y,
1930                     rect->width, rect->height);
1931
1932   gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
1933
1934   arrow_size = MIN (rect->width, rect->height) * arrow_scaling;
1935   arrow_x = rect->x + (rect->width - arrow_size) / 2;
1936   arrow_y = rect->y + (rect->height - arrow_size) / 2;
1937
1938   if (clicked && arrow_sensitive)
1939     {
1940       gint arrow_displacement_x;
1941       gint arrow_displacement_y;
1942
1943       gtk_range_get_props (GTK_RANGE (widget),
1944                            NULL, NULL, NULL, NULL, NULL, NULL,
1945                            &arrow_displacement_x, &arrow_displacement_y);
1946
1947       arrow_x += arrow_displacement_x;
1948       arrow_y += arrow_displacement_y;
1949     }
1950
1951   switch (arrow_type)
1952     {
1953     case GTK_ARROW_RIGHT:
1954       angle = G_PI / 2;
1955       break;
1956     case GTK_ARROW_DOWN:
1957       angle = G_PI;
1958       break;
1959     case GTK_ARROW_LEFT:
1960       angle = 3 * (G_PI / 2);
1961       break;
1962     case GTK_ARROW_UP:
1963     default:
1964       angle = 0;
1965       break;
1966     }
1967
1968   gtk_render_arrow (context, cr,
1969                     angle,
1970                     arrow_x, arrow_y,
1971                     arrow_size);
1972
1973   gtk_style_context_restore (context);
1974 }
1975
1976 static gboolean
1977 gtk_range_draw (GtkWidget *widget,
1978                 cairo_t   *cr)
1979 {
1980   GtkRange *range = GTK_RANGE (widget);
1981   GtkRangePrivate *priv = range->priv;
1982   gboolean sensitive;
1983   GtkStateFlags state = 0;
1984   gint focus_line_width = 0;
1985   gint focus_padding = 0;
1986   gboolean touchscreen;
1987   gboolean draw_trough = TRUE;
1988   GtkStyleContext *context;
1989
1990   context = gtk_widget_get_style_context (widget);
1991   g_object_get (gtk_widget_get_settings (widget),
1992                 "gtk-touchscreen-mode", &touchscreen,
1993                 NULL);
1994
1995   if (GTK_IS_SCALE (widget) &&
1996       gtk_adjustment_get_upper (priv->adjustment) == gtk_adjustment_get_lower (priv->adjustment))
1997     draw_trough = FALSE;
1998
1999   if (gtk_widget_get_can_focus (GTK_WIDGET (range)))
2000     gtk_widget_style_get (GTK_WIDGET (range),
2001                           "focus-line-width", &focus_line_width,
2002                           "focus-padding", &focus_padding,
2003                           NULL);
2004
2005   /* we're now exposing, so there's no need to force early repaints */
2006   if (priv->repaint_id)
2007     g_source_remove (priv->repaint_id);
2008   priv->repaint_id = 0;
2009
2010   gtk_range_calc_marks (range);
2011   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
2012
2013   sensitive = gtk_widget_is_sensitive (widget);
2014
2015   /* Just to be confusing, we draw the trough for the whole
2016    * range rectangle, not the trough rectangle (the trough
2017    * rectangle is just for hit detection)
2018    */
2019   cairo_save (cr);
2020   gdk_cairo_rectangle (cr, &priv->range_rect);
2021   cairo_clip (cr);
2022
2023     {
2024       gint     x      = (priv->range_rect.x +
2025                          focus_line_width + focus_padding);
2026       gint     y      = (priv->range_rect.y +
2027                          focus_line_width + focus_padding);
2028       gint     width  = (priv->range_rect.width -
2029                          2 * (focus_line_width + focus_padding));
2030       gint     height = (priv->range_rect.height -
2031                          2 * (focus_line_width + focus_padding));
2032       gboolean trough_under_steppers;
2033       gint     stepper_size;
2034       gint     stepper_spacing;
2035
2036       gtk_widget_style_get (GTK_WIDGET (range),
2037                             "trough-under-steppers", &trough_under_steppers,
2038                             "stepper-size",          &stepper_size,
2039                             "stepper-spacing",       &stepper_spacing,
2040                             NULL);
2041
2042       gtk_style_context_save (context);
2043
2044       if (!sensitive)
2045         gtk_style_context_set_state (context, GTK_STATE_FLAG_INSENSITIVE);
2046
2047       if (!trough_under_steppers)
2048         {
2049           gint offset  = 0;
2050           gint shorter = 0;
2051
2052           if (priv->has_stepper_a)
2053             offset += stepper_size;
2054
2055           if (priv->has_stepper_b)
2056             offset += stepper_size;
2057
2058           shorter += offset;
2059
2060           if (priv->has_stepper_c)
2061             shorter += stepper_size;
2062
2063           if (priv->has_stepper_d)
2064             shorter += stepper_size;
2065
2066           if (priv->has_stepper_a || priv->has_stepper_b)
2067             {
2068               offset  += stepper_spacing;
2069               shorter += stepper_spacing;
2070             }
2071
2072           if (priv->has_stepper_c || priv->has_stepper_d)
2073             {
2074               shorter += stepper_spacing;
2075             }
2076
2077           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2078             {
2079               x     += offset;
2080               width -= shorter;
2081             }
2082           else
2083             {
2084               y      += offset;
2085               height -= shorter;
2086             }
2087         }
2088
2089       gtk_style_context_save (context);
2090       gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
2091
2092       if (draw_trough)
2093         {
2094           gint trough_change_pos_x = width;
2095           gint trough_change_pos_y = height;
2096
2097           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2098             trough_change_pos_x = (priv->slider.x +
2099                                    priv->slider.width / 2 -
2100                                    x);
2101           else
2102             trough_change_pos_y = (priv->slider.y +
2103                                    priv->slider.height / 2 -
2104                                    y);
2105
2106           /* FIXME: was trough-upper and trough-lower really used,
2107            * in that case, it should still be exposed somehow.
2108            */
2109           gtk_render_background (context, cr, x, y,
2110                                  trough_change_pos_x,
2111                                  trough_change_pos_y);
2112
2113           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2114             trough_change_pos_y = 0;
2115           else
2116             trough_change_pos_x = 0;
2117
2118           gtk_render_background (context, cr,
2119                                  x + trough_change_pos_x, y + trough_change_pos_y,
2120                                  width - trough_change_pos_x,
2121                                  height - trough_change_pos_y);
2122
2123           gtk_render_frame (context, cr,
2124                             x, y, width, height);
2125         }
2126       else
2127         {
2128           gtk_render_background (context, cr,
2129                                  x, y, width, height);
2130           gtk_render_frame (context, cr,
2131                             x, y, width, height);
2132         }
2133
2134       gtk_style_context_restore (context);
2135
2136       if (priv->show_fill_level &&
2137           gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) -
2138           gtk_adjustment_get_lower (priv->adjustment) != 0)
2139         {
2140           gdouble  fill_level  = priv->fill_level;
2141           gint     fill_x      = x;
2142           gint     fill_y      = y;
2143           gint     fill_width  = width;
2144           gint     fill_height = height;
2145
2146           gtk_style_context_save (context);
2147           gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
2148
2149           fill_level = CLAMP (fill_level, gtk_adjustment_get_lower (priv->adjustment),
2150                               gtk_adjustment_get_upper (priv->adjustment) -
2151                               gtk_adjustment_get_page_size (priv->adjustment));
2152
2153           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2154             {
2155               fill_x     = priv->trough.x;
2156               fill_width = (priv->slider.width +
2157                             (fill_level - gtk_adjustment_get_lower (priv->adjustment)) /
2158                             (gtk_adjustment_get_upper (priv->adjustment) -
2159                              gtk_adjustment_get_lower (priv->adjustment) -
2160                              gtk_adjustment_get_page_size (priv->adjustment)) *
2161                             (priv->trough.width -
2162                              priv->slider.width));
2163
2164               if (should_invert (range))
2165                 fill_x += priv->trough.width - fill_width;
2166             }
2167           else
2168             {
2169               fill_y      = priv->trough.y;
2170               fill_height = (priv->slider.height +
2171                              (fill_level - gtk_adjustment_get_lower (priv->adjustment)) /
2172                              (gtk_adjustment_get_upper (priv->adjustment) -
2173                               gtk_adjustment_get_lower (priv->adjustment) -
2174                               gtk_adjustment_get_page_size (priv->adjustment)) *
2175                              (priv->trough.height -
2176                               priv->slider.height));
2177
2178               if (should_invert (range))
2179                 fill_y += priv->trough.height - fill_height;
2180             }
2181
2182 #if 0
2183           if (fill_level < gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment))
2184             fill_detail = "trough-fill-level-full";
2185           else
2186             fill_detail = "trough-fill-level";
2187 #endif
2188
2189           gtk_render_activity (context, cr,
2190                                fill_x, fill_y,
2191                                fill_width, fill_height);
2192
2193           gtk_style_context_restore (context);
2194         }
2195
2196       gtk_style_context_restore (context);
2197
2198       if (sensitive && gtk_widget_has_visible_focus (widget))
2199         {
2200           gtk_style_context_save (context);
2201           gtk_style_context_set_state (context,
2202                                        gtk_widget_get_state_flags (widget));
2203
2204           gtk_render_focus (context, cr,
2205                             priv->range_rect.x,
2206                             priv->range_rect.y,
2207                             priv->range_rect.width,
2208                             priv->range_rect.height);
2209
2210           gtk_style_context_restore (context);
2211         }
2212     }
2213
2214   cairo_restore (cr);
2215
2216   if (!sensitive)
2217     state = GTK_STATE_FLAG_INSENSITIVE;
2218   else if (!touchscreen && priv->mouse_location == MOUSE_SLIDER)
2219     state = GTK_STATE_FLAG_PRELIGHT;
2220
2221   if (priv->grab_location == MOUSE_SLIDER)
2222     state |= GTK_STATE_FLAG_ACTIVE;
2223
2224   cairo_save (cr);
2225   gdk_cairo_rectangle (cr, &priv->slider);
2226   cairo_clip (cr);
2227
2228   if (draw_trough)
2229     {
2230       gtk_style_context_save (context);
2231       gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
2232       gtk_style_context_set_state (context, state);
2233
2234       gtk_render_slider (context, cr,
2235                          priv->slider.x,
2236                          priv->slider.y,
2237                          priv->slider.width,
2238                          priv->slider.height,
2239                          priv->orientation);
2240
2241       gtk_style_context_restore (context);
2242     }
2243
2244   cairo_restore (cr);
2245
2246   if (priv->has_stepper_a)
2247     draw_stepper (range, STEPPER_A, cr,
2248                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
2249                   priv->grab_location == MOUSE_STEPPER_A,
2250                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_A);
2251
2252   if (priv->has_stepper_b)
2253     draw_stepper (range, STEPPER_B, cr,
2254                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
2255                   priv->grab_location == MOUSE_STEPPER_B,
2256                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_B);
2257
2258   if (priv->has_stepper_c)
2259     draw_stepper (range, STEPPER_C, cr,
2260                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
2261                   priv->grab_location == MOUSE_STEPPER_C,
2262                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_C);
2263
2264   if (priv->has_stepper_d)
2265     draw_stepper (range, STEPPER_D, cr,
2266                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
2267                   priv->grab_location == MOUSE_STEPPER_D,
2268                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_D);
2269
2270   return FALSE;
2271 }
2272
2273 static void
2274 range_grab_add (GtkRange      *range,
2275                 GdkDevice     *device,
2276                 MouseLocation  location,
2277                 gint           button)
2278 {
2279   GtkRangePrivate *priv = range->priv;
2280
2281   if (device == priv->grab_device)
2282     return;
2283
2284   if (priv->grab_device != NULL)
2285     {
2286       g_warning ("GtkRange already had a grab device, releasing device grab");
2287       gtk_device_grab_remove (GTK_WIDGET (range), priv->grab_device);
2288     }
2289
2290   /* we don't actually gdk_grab, since a button is down */
2291   gtk_device_grab_add (GTK_WIDGET (range), device, TRUE);
2292
2293   priv->grab_location = location;
2294   priv->grab_button = button;
2295   priv->grab_device = device;
2296
2297   if (gtk_range_update_mouse_location (range))
2298     gtk_widget_queue_draw (GTK_WIDGET (range));
2299 }
2300
2301 static void
2302 range_grab_remove (GtkRange *range)
2303 {
2304   GtkRangePrivate *priv = range->priv;
2305   MouseLocation location;
2306
2307   if (priv->grab_device)
2308     {
2309       gtk_device_grab_remove (GTK_WIDGET (range),
2310                               priv->grab_device);
2311       priv->grab_device = NULL;
2312     }
2313
2314   location = priv->grab_location;
2315   priv->grab_location = MOUSE_OUTSIDE;
2316   priv->grab_button = 0;
2317
2318   if (gtk_range_update_mouse_location (range) ||
2319       location != MOUSE_OUTSIDE)
2320     gtk_widget_queue_draw (GTK_WIDGET (range));
2321 }
2322
2323 static GtkScrollType
2324 range_get_scroll_for_grab (GtkRange      *range)
2325 {
2326   GtkRangePrivate *priv = range->priv;
2327   gboolean invert;
2328
2329   invert = should_invert (range);
2330   switch (priv->grab_location)
2331     {
2332       /* Backward stepper */
2333     case MOUSE_STEPPER_A:
2334     case MOUSE_STEPPER_C:
2335       switch (priv->grab_button)
2336         {
2337         case 1:
2338           return invert ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
2339           break;
2340         case 2:
2341           return invert ? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_PAGE_BACKWARD;
2342           break;
2343         case 3:
2344           return invert ? GTK_SCROLL_END : GTK_SCROLL_START;
2345           break;
2346         }
2347       break;
2348
2349       /* Forward stepper */
2350     case MOUSE_STEPPER_B:
2351     case MOUSE_STEPPER_D:
2352       switch (priv->grab_button)
2353         {
2354         case 1:
2355           return invert ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
2356           break;
2357         case 2:
2358           return invert ? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_PAGE_FORWARD;
2359           break;
2360         case 3:
2361           return invert ? GTK_SCROLL_START : GTK_SCROLL_END;
2362           break;
2363        }
2364       break;
2365
2366       /* In the trough */
2367     case MOUSE_TROUGH:
2368       {
2369         if (priv->trough_click_forward)
2370           return GTK_SCROLL_PAGE_FORWARD;
2371         else
2372           return GTK_SCROLL_PAGE_BACKWARD;
2373       }
2374       break;
2375
2376     case MOUSE_OUTSIDE:
2377     case MOUSE_SLIDER:
2378     case MOUSE_WIDGET:
2379       break;
2380     }
2381
2382   return GTK_SCROLL_NONE;
2383 }
2384
2385 static gdouble
2386 coord_to_value (GtkRange *range,
2387                 gint      coord)
2388 {
2389   GtkRangePrivate *priv = range->priv;
2390   gdouble frac;
2391   gdouble value;
2392   gint    trough_length;
2393   gint    trough_start;
2394   gint    slider_length;
2395   gint    trough_border;
2396   gint    trough_under_steppers;
2397
2398   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2399     {
2400       trough_length = priv->trough.height;
2401       trough_start  = priv->trough.y;
2402       slider_length = priv->slider.height;
2403     }
2404   else
2405     {
2406       trough_length = priv->trough.width;
2407       trough_start  = priv->trough.x;
2408       slider_length = priv->slider.width;
2409     }
2410
2411   gtk_range_get_props (range, NULL, NULL, NULL, &trough_border, NULL,
2412                        &trough_under_steppers, NULL, NULL);
2413
2414   if (! trough_under_steppers)
2415     {
2416       trough_start += trough_border;
2417       trough_length -= 2 * trough_border;
2418     }
2419
2420   if (trough_length == slider_length)
2421     frac = 1.0;
2422   else
2423     frac = (MAX (0, coord - trough_start) /
2424             (gdouble) (trough_length - slider_length));
2425
2426   if (should_invert (range))
2427     frac = 1.0 - frac;
2428
2429   value = gtk_adjustment_get_lower (priv->adjustment) + frac * (gtk_adjustment_get_upper (priv->adjustment) -
2430                                             gtk_adjustment_get_lower (priv->adjustment) -
2431                                             gtk_adjustment_get_page_size (priv->adjustment));
2432
2433   return value;
2434 }
2435
2436 static gboolean
2437 gtk_range_key_press (GtkWidget   *widget,
2438                      GdkEventKey *event)
2439 {
2440   GdkDevice *device;
2441   GtkRange *range = GTK_RANGE (widget);
2442   GtkRangePrivate *priv = range->priv;
2443
2444   device = gdk_event_get_device ((GdkEvent *) event);
2445   device = gdk_device_get_associated_device (device);
2446
2447   if (device == priv->grab_device &&
2448       event->keyval == GDK_KEY_Escape &&
2449       priv->grab_location != MOUSE_OUTSIDE)
2450     {
2451       stop_scrolling (range);
2452
2453       update_slider_position (range,
2454                               priv->slide_initial_coordinate,
2455                               priv->slide_initial_coordinate);
2456
2457       return TRUE;
2458     }
2459
2460   return GTK_WIDGET_CLASS (gtk_range_parent_class)->key_press_event (widget, event);
2461 }
2462
2463 static gint
2464 gtk_range_button_press (GtkWidget      *widget,
2465                         GdkEventButton *event)
2466 {
2467   GtkRange *range = GTK_RANGE (widget);
2468   GtkRangePrivate *priv = range->priv;
2469   GdkDevice *device;
2470
2471   if (!gtk_widget_has_focus (widget))
2472     gtk_widget_grab_focus (widget);
2473
2474   /* ignore presses when we're already doing something else. */
2475   if (priv->grab_location != MOUSE_OUTSIDE)
2476     return FALSE;
2477
2478   device = gdk_event_get_device ((GdkEvent *) event);
2479   priv->mouse_x = event->x;
2480   priv->mouse_y = event->y;
2481
2482   if (gtk_range_update_mouse_location (range))
2483     gtk_widget_queue_draw (widget);
2484
2485   if (priv->mouse_location == MOUSE_TROUGH  &&
2486       event->button == 1)
2487     {
2488       /* button 1 steps by page increment, as with button 2 on a stepper
2489        */
2490       GtkScrollType scroll;
2491       gdouble click_value;
2492
2493       click_value = coord_to_value (range,
2494                                     priv->orientation == GTK_ORIENTATION_VERTICAL ?
2495                                     event->y : event->x);
2496
2497       priv->trough_click_forward = click_value > gtk_adjustment_get_value (priv->adjustment);
2498       range_grab_add (range, device, MOUSE_TROUGH, event->button);
2499
2500       scroll = range_get_scroll_for_grab (range);
2501
2502       gtk_range_add_step_timer (range, scroll);
2503
2504       return TRUE;
2505     }
2506   else if ((priv->mouse_location == MOUSE_STEPPER_A ||
2507             priv->mouse_location == MOUSE_STEPPER_B ||
2508             priv->mouse_location == MOUSE_STEPPER_C ||
2509             priv->mouse_location == MOUSE_STEPPER_D) &&
2510            (event->button == 1 || event->button == 2 || event->button == 3))
2511     {
2512       GtkAllocation allocation;
2513       GdkRectangle *stepper_area;
2514       GtkScrollType scroll;
2515
2516       range_grab_add (range, device, priv->mouse_location, event->button);
2517
2518       gtk_widget_get_allocation (widget, &allocation);
2519       stepper_area = get_area (range, priv->mouse_location);
2520
2521       gtk_widget_queue_draw_area (widget,
2522                                   allocation.x + stepper_area->x,
2523                                   allocation.y + stepper_area->y,
2524                                   stepper_area->width,
2525                                   stepper_area->height);
2526
2527       scroll = range_get_scroll_for_grab (range);
2528       if (scroll != GTK_SCROLL_NONE)
2529         gtk_range_add_step_timer (range, scroll);
2530
2531       return TRUE;
2532     }
2533   else if ((priv->mouse_location == MOUSE_TROUGH &&
2534             event->button == 2) ||
2535            priv->mouse_location == MOUSE_SLIDER)
2536     {
2537       gboolean need_value_update = FALSE;
2538
2539       /* Any button can be used to drag the slider, but you can start
2540        * dragging the slider with a trough click using button 2;
2541        * On button 2 press, we warp the slider to mouse position,
2542        * then begin the slider drag.
2543        */
2544       if (event->button == 2)
2545         {
2546           gdouble slider_low_value, slider_high_value, new_value;
2547
2548           slider_high_value =
2549             coord_to_value (range,
2550                             priv->orientation == GTK_ORIENTATION_VERTICAL ?
2551                             event->y : event->x);
2552           slider_low_value =
2553             coord_to_value (range,
2554                             priv->orientation == GTK_ORIENTATION_VERTICAL ?
2555                             event->y - priv->slider.height :
2556                             event->x - priv->slider.width);
2557
2558           /* compute new value for warped slider */
2559           new_value = slider_low_value + (slider_high_value - slider_low_value) / 2;
2560
2561           /* recalc slider, so we can set slide_initial_slider_position
2562            * properly
2563            */
2564           priv->need_recalc = TRUE;
2565           gtk_range_calc_layout (range, new_value);
2566
2567           /* defer adjustment updates to update_slider_position() in order
2568            * to keep pixel quantisation
2569            */
2570           need_value_update = TRUE;
2571         }
2572
2573       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2574         {
2575           priv->slide_initial_slider_position = priv->slider.y;
2576           priv->slide_initial_coordinate = event->y;
2577         }
2578       else
2579         {
2580           priv->slide_initial_slider_position = priv->slider.x;
2581           priv->slide_initial_coordinate = event->x;
2582         }
2583
2584       range_grab_add (range, device, MOUSE_SLIDER, event->button);
2585
2586       gtk_widget_queue_draw (widget);
2587
2588       if (need_value_update)
2589         update_slider_position (range, event->x, event->y);
2590
2591       return TRUE;
2592     }
2593
2594   return FALSE;
2595 }
2596
2597 /* During a slide, move the slider as required given new mouse position */
2598 static void
2599 update_slider_position (GtkRange *range,
2600                         gint      mouse_x,
2601                         gint      mouse_y)
2602 {
2603   GtkRangePrivate *priv = range->priv;
2604   gint delta;
2605   gint c;
2606   gdouble new_value;
2607   gboolean handled;
2608   gdouble next_value;
2609   gdouble mark_value;
2610   gdouble mark_delta;
2611   gint i;
2612
2613   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2614     delta = mouse_y - priv->slide_initial_coordinate;
2615   else
2616     delta = mouse_x - priv->slide_initial_coordinate;
2617
2618   c = priv->slide_initial_slider_position + delta;
2619
2620   new_value = coord_to_value (range, c);
2621   next_value = coord_to_value (range, c + 1);
2622   mark_delta = fabs (next_value - new_value);
2623
2624   for (i = 0; i < priv->n_marks; i++)
2625     {
2626       mark_value = priv->marks[i];
2627
2628       if (fabs (gtk_adjustment_get_value (priv->adjustment) - mark_value) < 3 * mark_delta)
2629         {
2630           if (fabs (new_value - mark_value) < (priv->slider_end - priv->slider_start) * 0.5 * mark_delta)
2631             {
2632               new_value = mark_value;
2633               break;
2634             }
2635         }
2636     }
2637
2638   g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value,
2639                  &handled);
2640 }
2641
2642 static void
2643 stop_scrolling (GtkRange *range)
2644 {
2645   range_grab_remove (range);
2646   gtk_range_remove_step_timer (range);
2647 }
2648
2649 static gboolean
2650 gtk_range_grab_broken (GtkWidget          *widget,
2651                        GdkEventGrabBroken *event)
2652 {
2653   GtkRange *range = GTK_RANGE (widget);
2654   GtkRangePrivate *priv = range->priv;
2655   GdkDevice *device;
2656
2657   device = gdk_event_get_device ((GdkEvent *) event);
2658
2659   if (device == priv->grab_device &&
2660       priv->grab_location != MOUSE_OUTSIDE)
2661     {
2662       if (priv->grab_location == MOUSE_SLIDER)
2663         update_slider_position (range, priv->mouse_x, priv->mouse_y);
2664
2665       stop_scrolling (range);
2666
2667       return TRUE;
2668     }
2669
2670   return FALSE;
2671 }
2672
2673 static gint
2674 gtk_range_button_release (GtkWidget      *widget,
2675                           GdkEventButton *event)
2676 {
2677   GtkRange *range = GTK_RANGE (widget);
2678   GtkRangePrivate *priv = range->priv;
2679   GdkDevice *device;
2680
2681   if (event->window == priv->event_window)
2682     {
2683       priv->mouse_x = event->x;
2684       priv->mouse_y = event->y;
2685     }
2686   else
2687     {
2688       gdk_window_get_device_position (priv->event_window,
2689                                       event->device,
2690                                       &priv->mouse_x,
2691                                       &priv->mouse_y,
2692                                       NULL);
2693     }
2694
2695   device = gdk_event_get_device ((GdkEvent *) event);
2696
2697   if (priv->grab_device == device &&
2698       priv->grab_button == event->button)
2699     {
2700       if (priv->grab_location == MOUSE_SLIDER)
2701         update_slider_position (range, priv->mouse_x, priv->mouse_y);
2702
2703       stop_scrolling (range);
2704
2705       return TRUE;
2706     }
2707
2708   return FALSE;
2709 }
2710
2711 /**
2712  * _gtk_range_get_wheel_delta:
2713  * @range: a #GtkRange
2714  * @direction: A #GdkScrollDirection
2715  *
2716  * Returns a good step value for the mouse wheel.
2717  *
2718  * Return value: A good step value for the mouse wheel.
2719  *
2720  * Since: 2.4
2721  **/
2722 gdouble
2723 _gtk_range_get_wheel_delta (GtkRange           *range,
2724                             GdkScrollDirection  direction)
2725 {
2726   GtkRangePrivate *priv = range->priv;
2727   GtkAdjustment *adjustment = priv->adjustment;
2728   gdouble delta;
2729
2730   if (GTK_IS_SCROLLBAR (range))
2731     delta = pow (gtk_adjustment_get_page_size (adjustment), 2.0 / 3.0);
2732   else
2733     delta = gtk_adjustment_get_step_increment (adjustment) * 2;
2734
2735   if (direction == GDK_SCROLL_UP ||
2736       direction == GDK_SCROLL_LEFT)
2737     delta = - delta;
2738
2739   if (priv->inverted)
2740     delta = - delta;
2741
2742   return delta;
2743 }
2744
2745 static gboolean
2746 gtk_range_scroll_event (GtkWidget      *widget,
2747                         GdkEventScroll *event)
2748 {
2749   GtkRange *range = GTK_RANGE (widget);
2750   GtkRangePrivate *priv = range->priv;
2751
2752   if (gtk_widget_get_realized (widget))
2753     {
2754       gdouble delta;
2755       gboolean handled;
2756
2757       delta = _gtk_range_get_wheel_delta (range, event->direction);
2758
2759       g_signal_emit (range, signals[CHANGE_VALUE], 0,
2760                      GTK_SCROLL_JUMP, gtk_adjustment_get_value (priv->adjustment) + delta,
2761                      &handled);
2762     }
2763
2764   return TRUE;
2765 }
2766
2767 static gboolean
2768 gtk_range_motion_notify (GtkWidget      *widget,
2769                          GdkEventMotion *event)
2770 {
2771   GtkRange *range = GTK_RANGE (widget);
2772   GtkRangePrivate *priv = range->priv;
2773
2774   gdk_event_request_motions (event);
2775
2776   priv->mouse_x = event->x;
2777   priv->mouse_y = event->y;
2778
2779   if (gtk_range_update_mouse_location (range))
2780     gtk_widget_queue_draw (widget);
2781
2782   if (priv->grab_location == MOUSE_SLIDER)
2783     update_slider_position (range, event->x, event->y);
2784
2785   /* We handled the event if the mouse was in the range_rect */
2786   return priv->mouse_location != MOUSE_OUTSIDE;
2787 }
2788
2789 static gboolean
2790 gtk_range_enter_notify (GtkWidget        *widget,
2791                         GdkEventCrossing *event)
2792 {
2793   GtkRange *range = GTK_RANGE (widget);
2794   GtkRangePrivate *priv = range->priv;
2795
2796   priv->mouse_x = event->x;
2797   priv->mouse_y = event->y;
2798
2799   if (gtk_range_update_mouse_location (range))
2800     gtk_widget_queue_draw (widget);
2801
2802   return TRUE;
2803 }
2804
2805 static gboolean
2806 gtk_range_leave_notify (GtkWidget        *widget,
2807                         GdkEventCrossing *event)
2808 {
2809   GtkRange *range = GTK_RANGE (widget);
2810   GtkRangePrivate *priv = range->priv;
2811
2812   priv->mouse_x = -1;
2813   priv->mouse_y = -1;
2814
2815   if (gtk_range_update_mouse_location (range))
2816     gtk_widget_queue_draw (widget);
2817
2818   return TRUE;
2819 }
2820
2821 static void
2822 gtk_range_grab_notify (GtkWidget *widget,
2823                        gboolean   was_grabbed)
2824 {
2825   GtkRangePrivate *priv = GTK_RANGE (widget)->priv;
2826
2827   if (priv->grab_device &&
2828       gtk_widget_device_is_shadowed (widget, priv->grab_device))
2829     stop_scrolling (GTK_RANGE (widget));
2830 }
2831
2832 static void
2833 gtk_range_state_flags_changed (GtkWidget     *widget,
2834                                GtkStateFlags  previous_state)
2835 {
2836   if (!gtk_widget_is_sensitive (widget))
2837     stop_scrolling (GTK_RANGE (widget));
2838 }
2839
2840 #define check_rectangle(rectangle1, rectangle2)              \
2841   {                                                          \
2842     if (rectangle1.x != rectangle2.x) return TRUE;           \
2843     if (rectangle1.y != rectangle2.y) return TRUE;           \
2844     if (rectangle1.width  != rectangle2.width)  return TRUE; \
2845     if (rectangle1.height != rectangle2.height) return TRUE; \
2846   }
2847
2848 static gboolean
2849 layout_changed (GtkRangePrivate *priv1,
2850                 GtkRangePrivate *priv2)
2851 {
2852   check_rectangle (priv1->slider, priv2->slider);
2853   check_rectangle (priv1->trough, priv2->trough);
2854   check_rectangle (priv1->stepper_a, priv2->stepper_a);
2855   check_rectangle (priv1->stepper_d, priv2->stepper_d);
2856   check_rectangle (priv1->stepper_b, priv2->stepper_b);
2857   check_rectangle (priv1->stepper_c, priv2->stepper_c);
2858
2859   if (priv1->upper_sensitive != priv2->upper_sensitive) return TRUE;
2860   if (priv1->lower_sensitive != priv2->lower_sensitive) return TRUE;
2861
2862   return FALSE;
2863 }
2864
2865 static void
2866 gtk_range_adjustment_changed (GtkAdjustment *adjustment,
2867                               gpointer       data)
2868 {
2869   GtkRange *range = GTK_RANGE (data);
2870   GtkRangePrivate *priv = range->priv;
2871   GtkRangePrivate priv_aux = *priv;
2872
2873   priv->recalc_marks = TRUE;
2874   priv->need_recalc = TRUE;
2875   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
2876
2877   /* now check whether the layout changed  */
2878   if (layout_changed (priv, &priv_aux))
2879     gtk_widget_queue_draw (GTK_WIDGET (range));
2880
2881   /* Note that we don't round off to priv->round_digits here.
2882    * that's because it's really broken to change a value
2883    * in response to a change signal on that value; round_digits
2884    * is therefore defined to be a filter on what the GtkRange
2885    * can input into the adjustment, not a filter that the GtkRange
2886    * will enforce on the adjustment.
2887    */
2888 }
2889
2890 static gboolean
2891 force_repaint (gpointer data)
2892 {
2893   GtkRange *range = GTK_RANGE (data);
2894   GtkRangePrivate *priv = range->priv;
2895   GtkWidget *widget = GTK_WIDGET (range);
2896
2897   priv->repaint_id = 0;
2898   if (gtk_widget_is_drawable (widget))
2899     gdk_window_process_updates (gtk_widget_get_window (widget), FALSE);
2900
2901   return FALSE;
2902 }
2903
2904 static void
2905 gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
2906                                     gpointer       data)
2907 {
2908   GtkRange *range = GTK_RANGE (data);
2909   GtkRangePrivate *priv = range->priv;
2910   GtkRangePrivate priv_aux = *priv;
2911
2912   priv->need_recalc = TRUE;
2913   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
2914
2915   /* now check whether the layout changed  */
2916   if (layout_changed (priv, &priv_aux) ||
2917       (GTK_IS_SCALE (range) && gtk_scale_get_draw_value (GTK_SCALE (range))))
2918     {
2919       gtk_widget_queue_draw (GTK_WIDGET (range));
2920       /* setup a timer to ensure the range isn't lagging too much behind the scroll position */
2921       if (!priv->repaint_id)
2922         priv->repaint_id = gdk_threads_add_timeout_full (GDK_PRIORITY_EVENTS,
2923                                                          181, force_repaint,
2924                                                          range, NULL);
2925     }
2926
2927   /* Note that we don't round off to priv->round_digits here.
2928    * that's because it's really broken to change a value
2929    * in response to a change signal on that value; round_digits
2930    * is therefore defined to be a filter on what the GtkRange
2931    * can input into the adjustment, not a filter that the GtkRange
2932    * will enforce on the adjustment.
2933    */
2934
2935   g_signal_emit (range, signals[VALUE_CHANGED], 0);
2936 }
2937
2938 static void
2939 gtk_range_style_updated (GtkWidget *widget)
2940 {
2941   GtkRange *range = GTK_RANGE (widget);
2942   GtkRangePrivate *priv = range->priv;
2943
2944   priv->need_recalc = TRUE;
2945
2946   GTK_WIDGET_CLASS (gtk_range_parent_class)->style_updated (widget);
2947 }
2948
2949 static void
2950 apply_marks (GtkRange *range,
2951              gdouble   oldval,
2952              gdouble  *newval)
2953 {
2954   GtkRangePrivate *priv = range->priv;
2955   gint i;
2956   gdouble mark;
2957
2958   for (i = 0; i < priv->n_marks; i++)
2959     {
2960       mark = priv->marks[i];
2961       if ((oldval < mark && mark < *newval) ||
2962           (oldval > mark && mark > *newval))
2963         {
2964           *newval = mark;
2965           return;
2966         }
2967     }
2968 }
2969
2970 static void
2971 step_back (GtkRange *range)
2972 {
2973   GtkRangePrivate *priv = range->priv;
2974   gdouble newval;
2975   gboolean handled;
2976
2977   newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_step_increment (priv->adjustment);
2978   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
2979   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2980                  GTK_SCROLL_STEP_BACKWARD, newval, &handled);
2981 }
2982
2983 static void
2984 step_forward (GtkRange *range)
2985 {
2986   GtkRangePrivate *priv = range->priv;
2987   gdouble newval;
2988   gboolean handled;
2989
2990   newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_step_increment (priv->adjustment);
2991   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
2992   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2993                  GTK_SCROLL_STEP_FORWARD, newval, &handled);
2994 }
2995
2996
2997 static void
2998 page_back (GtkRange *range)
2999 {
3000   GtkRangePrivate *priv = range->priv;
3001   gdouble newval;
3002   gboolean handled;
3003
3004   newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_page_increment (priv->adjustment);
3005   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
3006   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3007                  GTK_SCROLL_PAGE_BACKWARD, newval, &handled);
3008 }
3009
3010 static void
3011 page_forward (GtkRange *range)
3012 {
3013   GtkRangePrivate *priv = range->priv;
3014   gdouble newval;
3015   gboolean handled;
3016
3017   newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_page_increment (priv->adjustment);
3018   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
3019   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3020                  GTK_SCROLL_PAGE_FORWARD, newval, &handled);
3021 }
3022
3023 static void
3024 scroll_begin (GtkRange *range)
3025 {
3026   GtkRangePrivate *priv = range->priv;
3027   gboolean handled;
3028
3029   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3030                  GTK_SCROLL_START, gtk_adjustment_get_lower (priv->adjustment),
3031                  &handled);
3032 }
3033
3034 static void
3035 scroll_end (GtkRange *range)
3036 {
3037   GtkRangePrivate *priv = range->priv;
3038   gdouble newval;
3039   gboolean handled;
3040
3041   newval = gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment);
3042   g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval,
3043                  &handled);
3044 }
3045
3046 static gboolean
3047 gtk_range_scroll (GtkRange     *range,
3048                   GtkScrollType scroll)
3049 {
3050   GtkRangePrivate *priv = range->priv;
3051   gdouble old_value = gtk_adjustment_get_value (priv->adjustment);
3052
3053   switch (scroll)
3054     {
3055     case GTK_SCROLL_STEP_LEFT:
3056       if (should_invert (range))
3057         step_forward (range);
3058       else
3059         step_back (range);
3060       break;
3061
3062     case GTK_SCROLL_STEP_UP:
3063       if (should_invert (range))
3064         step_forward (range);
3065       else
3066         step_back (range);
3067       break;
3068
3069     case GTK_SCROLL_STEP_RIGHT:
3070       if (should_invert (range))
3071         step_back (range);
3072       else
3073         step_forward (range);
3074       break;
3075
3076     case GTK_SCROLL_STEP_DOWN:
3077       if (should_invert (range))
3078         step_back (range);
3079       else
3080         step_forward (range);
3081       break;
3082
3083     case GTK_SCROLL_STEP_BACKWARD:
3084       step_back (range);
3085       break;
3086
3087     case GTK_SCROLL_STEP_FORWARD:
3088       step_forward (range);
3089       break;
3090
3091     case GTK_SCROLL_PAGE_LEFT:
3092       if (should_invert (range))
3093         page_forward (range);
3094       else
3095         page_back (range);
3096       break;
3097
3098     case GTK_SCROLL_PAGE_UP:
3099       if (should_invert (range))
3100         page_forward (range);
3101       else
3102         page_back (range);
3103       break;
3104
3105     case GTK_SCROLL_PAGE_RIGHT:
3106       if (should_invert (range))
3107         page_back (range);
3108       else
3109         page_forward (range);
3110       break;
3111
3112     case GTK_SCROLL_PAGE_DOWN:
3113       if (should_invert (range))
3114         page_back (range);
3115       else
3116         page_forward (range);
3117       break;
3118
3119     case GTK_SCROLL_PAGE_BACKWARD:
3120       page_back (range);
3121       break;
3122
3123     case GTK_SCROLL_PAGE_FORWARD:
3124       page_forward (range);
3125       break;
3126
3127     case GTK_SCROLL_START:
3128       scroll_begin (range);
3129       break;
3130
3131     case GTK_SCROLL_END:
3132       scroll_end (range);
3133       break;
3134
3135     case GTK_SCROLL_JUMP:
3136       /* Used by CList, range doesn't use it. */
3137       break;
3138
3139     case GTK_SCROLL_NONE:
3140       break;
3141     }
3142
3143   return gtk_adjustment_get_value (priv->adjustment) != old_value;
3144 }
3145
3146 static void
3147 gtk_range_move_slider (GtkRange     *range,
3148                        GtkScrollType scroll)
3149 {
3150   GtkRangePrivate *priv = range->priv;
3151   gboolean cursor_only;
3152
3153   g_object_get (gtk_widget_get_settings (GTK_WIDGET (range)),
3154                 "gtk-keynav-cursor-only", &cursor_only,
3155                 NULL);
3156
3157   if (cursor_only)
3158     {
3159       GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (range));
3160
3161       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
3162         {
3163           if (scroll == GTK_SCROLL_STEP_UP ||
3164               scroll == GTK_SCROLL_STEP_DOWN)
3165             {
3166               if (toplevel)
3167                 gtk_widget_child_focus (toplevel,
3168                                         scroll == GTK_SCROLL_STEP_UP ?
3169                                         GTK_DIR_UP : GTK_DIR_DOWN);
3170               return;
3171             }
3172         }
3173       else
3174         {
3175           if (scroll == GTK_SCROLL_STEP_LEFT ||
3176               scroll == GTK_SCROLL_STEP_RIGHT)
3177             {
3178               if (toplevel)
3179                 gtk_widget_child_focus (toplevel,
3180                                         scroll == GTK_SCROLL_STEP_LEFT ?
3181                                         GTK_DIR_LEFT : GTK_DIR_RIGHT);
3182               return;
3183             }
3184         }
3185     }
3186
3187   if (! gtk_range_scroll (range, scroll))
3188     gtk_widget_error_bell (GTK_WIDGET (range));
3189 }
3190
3191 static void
3192 gtk_range_get_props (GtkRange  *range,
3193                      gint      *slider_width,
3194                      gint      *stepper_size,
3195                      gint      *focus_width,
3196                      gint      *trough_border,
3197                      gint      *stepper_spacing,
3198                      gboolean  *trough_under_steppers,
3199                      gint      *arrow_displacement_x,
3200                      gint      *arrow_displacement_y)
3201 {
3202   GtkWidget *widget =  GTK_WIDGET (range);
3203   gint tmp_slider_width, tmp_stepper_size, tmp_focus_width, tmp_trough_border;
3204   gint tmp_stepper_spacing, tmp_trough_under_steppers;
3205   gint tmp_arrow_displacement_x, tmp_arrow_displacement_y;
3206
3207   gtk_widget_style_get (widget,
3208                         "slider-width", &tmp_slider_width,
3209                         "trough-border", &tmp_trough_border,
3210                         "stepper-size", &tmp_stepper_size,
3211                         "stepper-spacing", &tmp_stepper_spacing,
3212                         "trough-under-steppers", &tmp_trough_under_steppers,
3213                         "arrow-displacement-x", &tmp_arrow_displacement_x,
3214                         "arrow-displacement-y", &tmp_arrow_displacement_y,
3215                         NULL);
3216
3217   if (gtk_widget_get_can_focus (GTK_WIDGET (range)))
3218     {
3219       gint focus_line_width;
3220       gint focus_padding;
3221
3222       gtk_widget_style_get (GTK_WIDGET (range),
3223                             "focus-line-width", &focus_line_width,
3224                             "focus-padding", &focus_padding,
3225                             NULL);
3226
3227       tmp_focus_width = focus_line_width + focus_padding;
3228     }
3229   else
3230     {
3231       tmp_focus_width = 0;
3232     }
3233
3234   if (slider_width)
3235     *slider_width = tmp_slider_width;
3236
3237   if (focus_width)
3238     *focus_width = tmp_focus_width;
3239
3240   if (trough_border)
3241     *trough_border = tmp_trough_border;
3242
3243   if (stepper_size)
3244     *stepper_size = tmp_stepper_size;
3245
3246   if (stepper_spacing)
3247     *stepper_spacing = tmp_stepper_spacing;
3248
3249   if (trough_under_steppers)
3250     *trough_under_steppers = tmp_trough_under_steppers;
3251
3252   if (arrow_displacement_x)
3253     *arrow_displacement_x = tmp_arrow_displacement_x;
3254
3255   if (arrow_displacement_y)
3256     *arrow_displacement_y = tmp_arrow_displacement_y;
3257 }
3258
3259 #define POINT_IN_RECT(xcoord, ycoord, rect) \
3260  ((xcoord) >= (rect).x &&                   \
3261   (xcoord) <  ((rect).x + (rect).width) &&  \
3262   (ycoord) >= (rect).y &&                   \
3263   (ycoord) <  ((rect).y + (rect).height))
3264
3265 /* Update mouse location, return TRUE if it changes */
3266 static gboolean
3267 gtk_range_update_mouse_location (GtkRange *range)
3268 {
3269   GtkRangePrivate *priv = range->priv;
3270   GtkAllocation allocation;
3271   gint x, y;
3272   MouseLocation old;
3273   GtkWidget *widget = GTK_WIDGET (range);
3274
3275   old = priv->mouse_location;
3276
3277   x = priv->mouse_x;
3278   y = priv->mouse_y;
3279
3280   gtk_widget_get_allocation (widget, &allocation);
3281
3282   if (priv->grab_location != MOUSE_OUTSIDE)
3283     priv->mouse_location = priv->grab_location;
3284   else if (POINT_IN_RECT (x, y, priv->stepper_a))
3285     priv->mouse_location = MOUSE_STEPPER_A;
3286   else if (POINT_IN_RECT (x, y, priv->stepper_b))
3287     priv->mouse_location = MOUSE_STEPPER_B;
3288   else if (POINT_IN_RECT (x, y, priv->stepper_c))
3289     priv->mouse_location = MOUSE_STEPPER_C;
3290   else if (POINT_IN_RECT (x, y, priv->stepper_d))
3291     priv->mouse_location = MOUSE_STEPPER_D;
3292   else if (POINT_IN_RECT (x, y, priv->slider))
3293     priv->mouse_location = MOUSE_SLIDER;
3294   else if (POINT_IN_RECT (x, y, priv->trough))
3295     priv->mouse_location = MOUSE_TROUGH;
3296   else if (POINT_IN_RECT (x, y, allocation))
3297     priv->mouse_location = MOUSE_WIDGET;
3298   else
3299     priv->mouse_location = MOUSE_OUTSIDE;
3300
3301   return old != priv->mouse_location;
3302 }
3303
3304 /* Clamp rect, border inside widget->allocation, such that we prefer
3305  * to take space from border not rect in all directions, and prefer to
3306  * give space to border over rect in one direction.
3307  */
3308 static void
3309 clamp_dimensions (GtkWidget    *widget,
3310                   GdkRectangle *rect,
3311                   GtkBorder    *border,
3312                   gboolean      border_expands_horizontally)
3313 {
3314   GtkAllocation allocation;
3315   gint extra, shortage;
3316
3317   g_return_if_fail (rect->x == 0);
3318   g_return_if_fail (rect->y == 0);
3319   g_return_if_fail (rect->width >= 0);
3320   g_return_if_fail (rect->height >= 0);
3321
3322   gtk_widget_get_allocation (widget, &allocation);
3323
3324   /* Width */
3325
3326   extra = allocation.width - border->left - border->right - rect->width;
3327   if (extra > 0)
3328     {
3329       if (border_expands_horizontally)
3330         {
3331           border->left += extra / 2;
3332           border->right += extra / 2 + extra % 2;
3333         }
3334       else
3335         {
3336           rect->width += extra;
3337         }
3338     }
3339
3340   /* See if we can fit rect, if not kill the border */
3341   shortage = rect->width - allocation.width;
3342   if (shortage > 0)
3343     {
3344       rect->width = allocation.width;
3345       /* lose the border */
3346       border->left = 0;
3347       border->right = 0;
3348     }
3349   else
3350     {
3351       /* See if we can fit rect with borders */
3352       shortage = rect->width + border->left + border->right - allocation.width;
3353       if (shortage > 0)
3354         {
3355           /* Shrink borders */
3356           border->left -= shortage / 2;
3357           border->right -= shortage / 2 + shortage % 2;
3358         }
3359     }
3360
3361   /* Height */
3362
3363   extra = allocation.height - border->top - border->bottom - rect->height;
3364   if (extra > 0)
3365     {
3366       if (border_expands_horizontally)
3367         {
3368           /* don't expand border vertically */
3369           rect->height += extra;
3370         }
3371       else
3372         {
3373           border->top += extra / 2;
3374           border->bottom += extra / 2 + extra % 2;
3375         }
3376     }
3377
3378   /* See if we can fit rect, if not kill the border */
3379   shortage = rect->height - allocation.height;
3380   if (shortage > 0)
3381     {
3382       rect->height = allocation.height;
3383       /* lose the border */
3384       border->top = 0;
3385       border->bottom = 0;
3386     }
3387   else
3388     {
3389       /* See if we can fit rect with borders */
3390       shortage = rect->height + border->top + border->bottom - allocation.height;
3391       if (shortage > 0)
3392         {
3393           /* Shrink borders */
3394           border->top -= shortage / 2;
3395           border->bottom -= shortage / 2 + shortage % 2;
3396         }
3397     }
3398 }
3399
3400 static void
3401 gtk_range_calc_request (GtkRange      *range,
3402                         gint           slider_width,
3403                         gint           stepper_size,
3404                         gint           focus_width,
3405                         gint           trough_border,
3406                         gint           stepper_spacing,
3407                         GdkRectangle  *range_rect,
3408                         GtkBorder     *border,
3409                         gint          *n_steppers_p,
3410                         gboolean      *has_steppers_ab,
3411                         gboolean      *has_steppers_cd,
3412                         gint          *slider_length_p)
3413 {
3414   GtkRangePrivate *priv = range->priv;
3415   gint slider_length;
3416   gint n_steppers;
3417   gint n_steppers_ab;
3418   gint n_steppers_cd;
3419
3420   border->left = 0;
3421   border->right = 0;
3422   border->top = 0;
3423   border->bottom = 0;
3424
3425   if (GTK_RANGE_GET_CLASS (range)->get_range_border)
3426     GTK_RANGE_GET_CLASS (range)->get_range_border (range, border);
3427
3428   n_steppers_ab = 0;
3429   n_steppers_cd = 0;
3430
3431   if (priv->has_stepper_a)
3432     n_steppers_ab += 1;
3433   if (priv->has_stepper_b)
3434     n_steppers_ab += 1;
3435   if (priv->has_stepper_c)
3436     n_steppers_cd += 1;
3437   if (priv->has_stepper_d)
3438     n_steppers_cd += 1;
3439
3440   n_steppers = n_steppers_ab + n_steppers_cd;
3441
3442   slider_length = priv->min_slider_size;
3443
3444   range_rect->x = 0;
3445   range_rect->y = 0;
3446
3447   /* We never expand to fill available space in the small dimension
3448    * (i.e. vertical scrollbars are always a fixed width)
3449    */
3450   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3451     {
3452       range_rect->width = (focus_width + trough_border) * 2 + slider_width;
3453       range_rect->height = stepper_size * n_steppers + (focus_width + trough_border) * 2 + slider_length;
3454
3455       if (n_steppers_ab > 0)
3456         range_rect->height += stepper_spacing;
3457
3458       if (n_steppers_cd > 0)
3459         range_rect->height += stepper_spacing;
3460     }
3461   else
3462     {
3463       range_rect->width = stepper_size * n_steppers + (focus_width + trough_border) * 2 + slider_length;
3464       range_rect->height = (focus_width + trough_border) * 2 + slider_width;
3465
3466       if (n_steppers_ab > 0)
3467         range_rect->width += stepper_spacing;
3468
3469       if (n_steppers_cd > 0)
3470         range_rect->width += stepper_spacing;
3471     }
3472
3473   if (n_steppers_p)
3474     *n_steppers_p = n_steppers;
3475
3476   if (has_steppers_ab)
3477     *has_steppers_ab = (n_steppers_ab > 0);
3478
3479   if (has_steppers_cd)
3480     *has_steppers_cd = (n_steppers_cd > 0);
3481
3482   if (slider_length_p)
3483     *slider_length_p = slider_length;
3484 }
3485
3486 static void
3487 gtk_range_calc_layout (GtkRange *range,
3488                        gdouble   adjustment_value)
3489 {
3490   GtkRangePrivate *priv = range->priv;
3491   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
3492   gint slider_length;
3493   GtkBorder border;
3494   gint n_steppers;
3495   gboolean has_steppers_ab;
3496   gboolean has_steppers_cd;
3497   gboolean trough_under_steppers;
3498   GdkRectangle range_rect;
3499   GtkWidget *widget;
3500
3501   if (!priv->need_recalc)
3502     return;
3503
3504   /* If we have a too-small allocation, we prefer the steppers over
3505    * the trough/slider, probably the steppers are a more useful
3506    * feature in small spaces.
3507    *
3508    * Also, we prefer to draw the range itself rather than the border
3509    * areas if there's a conflict, since the borders will be decoration
3510    * not controls. Though this depends on subclasses cooperating by
3511    * not drawing on priv->range_rect.
3512    */
3513
3514   widget = GTK_WIDGET (range);
3515
3516   gtk_range_get_props (range,
3517                        &slider_width, &stepper_size,
3518                        &focus_width, &trough_border,
3519                        &stepper_spacing, &trough_under_steppers,
3520                        NULL, NULL);
3521
3522   gtk_range_calc_request (range,
3523                           slider_width, stepper_size,
3524                           focus_width, trough_border, stepper_spacing,
3525                           &range_rect, &border, &n_steppers,
3526                           &has_steppers_ab, &has_steppers_cd, &slider_length);
3527
3528   /* We never expand to fill available space in the small dimension
3529    * (i.e. vertical scrollbars are always a fixed width)
3530    */
3531   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3532     {
3533       clamp_dimensions (widget, &range_rect, &border, TRUE);
3534     }
3535   else
3536     {
3537       clamp_dimensions (widget, &range_rect, &border, FALSE);
3538     }
3539
3540   range_rect.x = border.left;
3541   range_rect.y = border.top;
3542
3543   priv->range_rect = range_rect;
3544
3545   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3546     {
3547       gint stepper_width, stepper_height;
3548
3549       /* Steppers are the width of the range, and stepper_size in
3550        * height, or if we don't have enough height, divided equally
3551        * among available space.
3552        */
3553       stepper_width = range_rect.width - focus_width * 2;
3554
3555       if (trough_under_steppers)
3556         stepper_width -= trough_border * 2;
3557
3558       if (stepper_width < 1)
3559         stepper_width = range_rect.width; /* screw the trough border */
3560
3561       if (n_steppers == 0)
3562         stepper_height = 0; /* avoid divide by n_steppers */
3563       else
3564         stepper_height = MIN (stepper_size, (range_rect.height / n_steppers));
3565
3566       /* Stepper A */
3567
3568       priv->stepper_a.x = range_rect.x + focus_width + trough_border * trough_under_steppers;
3569       priv->stepper_a.y = range_rect.y + focus_width + trough_border * trough_under_steppers;
3570
3571       if (priv->has_stepper_a)
3572         {
3573           priv->stepper_a.width = stepper_width;
3574           priv->stepper_a.height = stepper_height;
3575         }
3576       else
3577         {
3578           priv->stepper_a.width = 0;
3579           priv->stepper_a.height = 0;
3580         }
3581
3582       /* Stepper B */
3583
3584       priv->stepper_b.x = priv->stepper_a.x;
3585       priv->stepper_b.y = priv->stepper_a.y + priv->stepper_a.height;
3586
3587       if (priv->has_stepper_b)
3588         {
3589           priv->stepper_b.width = stepper_width;
3590           priv->stepper_b.height = stepper_height;
3591         }
3592       else
3593         {
3594           priv->stepper_b.width = 0;
3595           priv->stepper_b.height = 0;
3596         }
3597
3598       /* Stepper D */
3599
3600       if (priv->has_stepper_d)
3601         {
3602           priv->stepper_d.width = stepper_width;
3603           priv->stepper_d.height = stepper_height;
3604         }
3605       else
3606         {
3607           priv->stepper_d.width = 0;
3608           priv->stepper_d.height = 0;
3609         }
3610
3611       priv->stepper_d.x = priv->stepper_a.x;
3612       priv->stepper_d.y = range_rect.y + range_rect.height - priv->stepper_d.height - focus_width - trough_border * trough_under_steppers;
3613
3614       /* Stepper C */
3615
3616       if (priv->has_stepper_c)
3617         {
3618           priv->stepper_c.width = stepper_width;
3619           priv->stepper_c.height = stepper_height;
3620         }
3621       else
3622         {
3623           priv->stepper_c.width = 0;
3624           priv->stepper_c.height = 0;
3625         }
3626
3627       priv->stepper_c.x = priv->stepper_a.x;
3628       priv->stepper_c.y = priv->stepper_d.y - priv->stepper_c.height;
3629
3630       /* Now the trough is the remaining space between steppers B and C,
3631        * if any, minus spacing
3632        */
3633       priv->trough.x = range_rect.x;
3634       priv->trough.y = priv->stepper_b.y + priv->stepper_b.height + stepper_spacing * has_steppers_ab;
3635       priv->trough.width = range_rect.width;
3636       priv->trough.height = priv->stepper_c.y - priv->trough.y - stepper_spacing * has_steppers_cd;
3637
3638       /* Slider fits into the trough, with stepper_spacing on either side,
3639        * and the size/position based on the adjustment or fixed, depending.
3640        */
3641       priv->slider.x = priv->trough.x + focus_width + trough_border;
3642       priv->slider.width = priv->trough.width - (focus_width + trough_border) * 2;
3643
3644       /* Compute slider position/length */
3645       {
3646         gint y, bottom, top, height;
3647
3648         top = priv->trough.y;
3649         bottom = priv->trough.y + priv->trough.height;
3650
3651         if (! trough_under_steppers)
3652           {
3653             top += trough_border;
3654             bottom -= trough_border;
3655           }
3656
3657         /* slider height is the fraction (page_size /
3658          * total_adjustment_range) times the trough height in pixels
3659          */
3660
3661         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0)
3662           height = ((bottom - top) * (gtk_adjustment_get_page_size (priv->adjustment) /
3663                                        (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment))));
3664         else
3665           height = priv->min_slider_size;
3666
3667         if (height < priv->min_slider_size ||
3668             priv->slider_size_fixed)
3669           height = priv->min_slider_size;
3670
3671         height = MIN (height, priv->trough.height);
3672
3673         y = top;
3674
3675         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) != 0)
3676           y += (bottom - top - height) * ((adjustment_value - gtk_adjustment_get_lower (priv->adjustment)) /
3677                                           (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3678
3679         y = CLAMP (y, top, bottom);
3680
3681         if (should_invert (range))
3682           y = bottom - (y - top + height);
3683
3684         priv->slider.y = y;
3685         priv->slider.height = height;
3686
3687         /* These are publically exported */
3688         priv->slider_start = priv->slider.y;
3689         priv->slider_end = priv->slider.y + priv->slider.height;
3690       }
3691     }
3692   else
3693     {
3694       gint stepper_width, stepper_height;
3695
3696       /* Steppers are the height of the range, and stepper_size in
3697        * width, or if we don't have enough width, divided equally
3698        * among available space.
3699        */
3700       stepper_height = range_rect.height + focus_width * 2;
3701
3702       if (trough_under_steppers)
3703         stepper_height -= trough_border * 2;
3704
3705       if (stepper_height < 1)
3706         stepper_height = range_rect.height; /* screw the trough border */
3707
3708       if (n_steppers == 0)
3709         stepper_width = 0; /* avoid divide by n_steppers */
3710       else
3711         stepper_width = MIN (stepper_size, (range_rect.width / n_steppers));
3712
3713       /* Stepper A */
3714
3715       priv->stepper_a.x = range_rect.x + focus_width + trough_border * trough_under_steppers;
3716       priv->stepper_a.y = range_rect.y + focus_width + trough_border * trough_under_steppers;
3717
3718       if (priv->has_stepper_a)
3719         {
3720           priv->stepper_a.width = stepper_width;
3721           priv->stepper_a.height = stepper_height;
3722         }
3723       else
3724         {
3725           priv->stepper_a.width = 0;
3726           priv->stepper_a.height = 0;
3727         }
3728
3729       /* Stepper B */
3730
3731       priv->stepper_b.x = priv->stepper_a.x + priv->stepper_a.width;
3732       priv->stepper_b.y = priv->stepper_a.y;
3733
3734       if (priv->has_stepper_b)
3735         {
3736           priv->stepper_b.width = stepper_width;
3737           priv->stepper_b.height = stepper_height;
3738         }
3739       else
3740         {
3741           priv->stepper_b.width = 0;
3742           priv->stepper_b.height = 0;
3743         }
3744
3745       /* Stepper D */
3746
3747       if (priv->has_stepper_d)
3748         {
3749           priv->stepper_d.width = stepper_width;
3750           priv->stepper_d.height = stepper_height;
3751         }
3752       else
3753         {
3754           priv->stepper_d.width = 0;
3755           priv->stepper_d.height = 0;
3756         }
3757
3758       priv->stepper_d.x = range_rect.x + range_rect.width - priv->stepper_d.width - focus_width - trough_border * trough_under_steppers;
3759       priv->stepper_d.y = priv->stepper_a.y;
3760
3761
3762       /* Stepper C */
3763
3764       if (priv->has_stepper_c)
3765         {
3766           priv->stepper_c.width = stepper_width;
3767           priv->stepper_c.height = stepper_height;
3768         }
3769       else
3770         {
3771           priv->stepper_c.width = 0;
3772           priv->stepper_c.height = 0;
3773         }
3774
3775       priv->stepper_c.x = priv->stepper_d.x - priv->stepper_c.width;
3776       priv->stepper_c.y = priv->stepper_a.y;
3777
3778       /* Now the trough is the remaining space between steppers B and C,
3779        * if any
3780        */
3781       priv->trough.x = priv->stepper_b.x + priv->stepper_b.width + stepper_spacing * has_steppers_ab;
3782       priv->trough.y = range_rect.y;
3783
3784       priv->trough.width = priv->stepper_c.x - priv->trough.x - stepper_spacing * has_steppers_cd;
3785       priv->trough.height = range_rect.height;
3786
3787       /* Slider fits into the trough, with stepper_spacing on either side,
3788        * and the size/position based on the adjustment or fixed, depending.
3789        */
3790       priv->slider.y = priv->trough.y + focus_width + trough_border;
3791       priv->slider.height = priv->trough.height - (focus_width + trough_border) * 2;
3792
3793       /* Compute slider position/length */
3794       {
3795         gint x, left, right, width;
3796
3797         left = priv->trough.x;
3798         right = priv->trough.x + priv->trough.width;
3799
3800         if (! trough_under_steppers)
3801           {
3802             left += trough_border;
3803             right -= trough_border;
3804           }
3805
3806         /* slider width is the fraction (page_size /
3807          * total_adjustment_range) times the trough width in pixels
3808          */
3809
3810         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0)
3811           width = ((right - left) * (gtk_adjustment_get_page_size (priv->adjustment) /
3812                                    (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment))));
3813         else
3814           width = priv->min_slider_size;
3815
3816         if (width < priv->min_slider_size ||
3817             priv->slider_size_fixed)
3818           width = priv->min_slider_size;
3819
3820         width = MIN (width, priv->trough.width);
3821
3822         x = left;
3823
3824         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) != 0)
3825           x += (right - left - width) * ((adjustment_value - gtk_adjustment_get_lower (priv->adjustment)) /
3826                                          (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3827
3828         x = CLAMP (x, left, right);
3829
3830         if (should_invert (range))
3831           x = right - (x - left + width);
3832
3833         priv->slider.x = x;
3834         priv->slider.width = width;
3835
3836         /* These are publically exported */
3837         priv->slider_start = priv->slider.x;
3838         priv->slider_end = priv->slider.x + priv->slider.width;
3839       }
3840     }
3841
3842   gtk_range_update_mouse_location (range);
3843
3844   switch (priv->upper_sensitivity)
3845     {
3846     case GTK_SENSITIVITY_AUTO:
3847       priv->upper_sensitive =
3848         (gtk_adjustment_get_value (priv->adjustment) <
3849          (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3850       break;
3851
3852     case GTK_SENSITIVITY_ON:
3853       priv->upper_sensitive = TRUE;
3854       break;
3855
3856     case GTK_SENSITIVITY_OFF:
3857       priv->upper_sensitive = FALSE;
3858       break;
3859     }
3860
3861   switch (priv->lower_sensitivity)
3862     {
3863     case GTK_SENSITIVITY_AUTO:
3864       priv->lower_sensitive =
3865         (gtk_adjustment_get_value (priv->adjustment) > gtk_adjustment_get_lower (priv->adjustment));
3866       break;
3867
3868     case GTK_SENSITIVITY_ON:
3869       priv->lower_sensitive = TRUE;
3870       break;
3871
3872     case GTK_SENSITIVITY_OFF:
3873       priv->lower_sensitive = FALSE;
3874       break;
3875     }
3876 }
3877
3878 static GdkRectangle*
3879 get_area (GtkRange     *range,
3880           MouseLocation location)
3881 {
3882   GtkRangePrivate *priv = range->priv;
3883
3884   switch (location)
3885     {
3886     case MOUSE_STEPPER_A:
3887       return &priv->stepper_a;
3888     case MOUSE_STEPPER_B:
3889       return &priv->stepper_b;
3890     case MOUSE_STEPPER_C:
3891       return &priv->stepper_c;
3892     case MOUSE_STEPPER_D:
3893       return &priv->stepper_d;
3894     case MOUSE_TROUGH:
3895       return &priv->trough;
3896     case MOUSE_SLIDER:
3897       return &priv->slider;
3898     case MOUSE_WIDGET:
3899     case MOUSE_OUTSIDE:
3900       break;
3901     }
3902
3903   g_warning (G_STRLOC": bug");
3904   return NULL;
3905 }
3906
3907 static void
3908 gtk_range_calc_marks (GtkRange *range)
3909 {
3910   GtkRangePrivate *priv = range->priv;
3911   gint i;
3912
3913   if (!priv->recalc_marks)
3914     return;
3915
3916   priv->recalc_marks = FALSE;
3917
3918   for (i = 0; i < priv->n_marks; i++)
3919     {
3920       priv->need_recalc = TRUE;
3921       gtk_range_calc_layout (range, priv->marks[i]);
3922       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
3923         priv->mark_pos[i] = priv->slider.x + priv->slider.width / 2;
3924       else
3925         priv->mark_pos[i] = priv->slider.y + priv->slider.height / 2;
3926     }
3927
3928   priv->need_recalc = TRUE;
3929 }
3930
3931 static gboolean
3932 gtk_range_real_change_value (GtkRange     *range,
3933                              GtkScrollType scroll,
3934                              gdouble       value)
3935 {
3936   GtkRangePrivate *priv = range->priv;
3937
3938   /* potentially adjust the bounds _before_ we clamp */
3939   g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value);
3940
3941   if (priv->restrict_to_fill_level)
3942     value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment),
3943                              priv->fill_level));
3944
3945   value = CLAMP (value, gtk_adjustment_get_lower (priv->adjustment),
3946                  (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3947
3948   if (priv->round_digits >= 0)
3949     {
3950       gdouble power;
3951       gint i;
3952
3953       i = priv->round_digits;
3954       power = 1;
3955       while (i--)
3956         power *= 10;
3957
3958       value = floor ((value * power) + 0.5) / power;
3959     }
3960
3961   if (gtk_adjustment_get_value (priv->adjustment) != value)
3962     {
3963       priv->need_recalc = TRUE;
3964
3965       gtk_widget_queue_draw (GTK_WIDGET (range));
3966
3967       gtk_adjustment_set_value (priv->adjustment, value);
3968     }
3969   return FALSE;
3970 }
3971
3972 struct _GtkRangeStepTimer
3973 {
3974   guint timeout_id;
3975   GtkScrollType step;
3976 };
3977
3978 static gboolean
3979 second_timeout (gpointer data)
3980 {
3981   GtkRange *range = GTK_RANGE (data);
3982   GtkRangePrivate *priv = range->priv;
3983
3984   gtk_range_scroll (range, priv->timer->step);
3985
3986   return TRUE;
3987 }
3988
3989 static gboolean
3990 initial_timeout (gpointer data)
3991 {
3992   GtkRange *range = GTK_RANGE (data);
3993   GtkRangePrivate *priv = range->priv;
3994   GtkSettings *settings;
3995   guint        timeout;
3996
3997   settings = gtk_widget_get_settings (GTK_WIDGET (data));
3998   g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
3999
4000   priv->timer->timeout_id = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
4001                                                      second_timeout,
4002                                                      range);
4003   /* remove self */
4004   return FALSE;
4005 }
4006
4007 static void
4008 gtk_range_add_step_timer (GtkRange      *range,
4009                           GtkScrollType  step)
4010 {
4011   GtkRangePrivate *priv = range->priv;
4012   GtkSettings *settings;
4013   guint        timeout;
4014
4015   g_return_if_fail (priv->timer == NULL);
4016   g_return_if_fail (step != GTK_SCROLL_NONE);
4017
4018   settings = gtk_widget_get_settings (GTK_WIDGET (range));
4019   g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
4020
4021   priv->timer = g_new (GtkRangeStepTimer, 1);
4022
4023   priv->timer->timeout_id = gdk_threads_add_timeout (timeout,
4024                                                      initial_timeout,
4025                                                      range);
4026   priv->timer->step = step;
4027
4028   gtk_range_scroll (range, priv->timer->step);
4029 }
4030
4031 static void
4032 gtk_range_remove_step_timer (GtkRange *range)
4033 {
4034   GtkRangePrivate *priv = range->priv;
4035
4036   if (priv->timer)
4037     {
4038       if (priv->timer->timeout_id != 0)
4039         g_source_remove (priv->timer->timeout_id);
4040
4041       g_free (priv->timer);
4042
4043       priv->timer = NULL;
4044     }
4045 }
4046
4047 void
4048 _gtk_range_set_stop_values (GtkRange *range,
4049                             gdouble  *values,
4050                             gint      n_values)
4051 {
4052   GtkRangePrivate *priv = range->priv;
4053   gint i;
4054
4055   g_free (priv->marks);
4056   priv->marks = g_new (gdouble, n_values);
4057
4058   g_free (priv->mark_pos);
4059   priv->mark_pos = g_new (gint, n_values);
4060
4061   priv->n_marks = n_values;
4062
4063   for (i = 0; i < n_values; i++)
4064     priv->marks[i] = values[i];
4065
4066   priv->recalc_marks = TRUE;
4067 }
4068
4069 gint
4070 _gtk_range_get_stop_positions (GtkRange  *range,
4071                                gint     **values)
4072 {
4073   GtkRangePrivate *priv = range->priv;
4074
4075   gtk_range_calc_marks (range);
4076
4077   if (values)
4078     *values = g_memdup (priv->mark_pos, priv->n_marks * sizeof (gint));
4079
4080   return priv->n_marks;
4081 }
4082
4083 /**
4084  * gtk_range_set_round_digits:
4085  * @range: a #GtkRange
4086  * @round_digits: the precision in digits, or -1
4087  *
4088  * Sets the number of digits to round the value to when
4089  * it changes. See #GtkRange::change-value.
4090  *
4091  * Since: 2.24
4092  */
4093 void
4094 gtk_range_set_round_digits (GtkRange *range,
4095                             gint      round_digits)
4096 {
4097   g_return_if_fail (GTK_IS_RANGE (range));
4098   g_return_if_fail (round_digits >= -1);
4099
4100   range->priv->round_digits = round_digits;
4101
4102   g_object_notify (G_OBJECT (range), "round-digits");
4103 }
4104
4105 /**
4106  * gtk_range_get_round_digits:
4107  * @range: a #GtkRange
4108  *
4109  * Gets the number of digits to round the value to when
4110  * it changes. See #GtkRange::change-value.
4111  *
4112  * Return value: the number of digits to round to
4113  *
4114  * Since: 2.24
4115  */
4116 gint
4117 gtk_range_get_round_digits (GtkRange *range)
4118 {
4119   g_return_val_if_fail (GTK_IS_RANGE (range), -1);
4120
4121   return range->priv->round_digits;
4122 }
4123
4124 void
4125 _gtk_range_set_steppers (GtkRange      *range,
4126                          gboolean       has_a,
4127                          gboolean       has_b,
4128                          gboolean       has_c,
4129                          gboolean       has_d)
4130 {
4131   range->priv->has_stepper_a = has_a;
4132   range->priv->has_stepper_b = has_b;
4133   range->priv->has_stepper_c = has_c;
4134   range->priv->has_stepper_d = has_d;
4135 }