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   /* The range has an origin, should be drawn differently. Used by GtkScale */
 141   guint has_origin             : 1;
 142
 143   /* Fill level */
 144   guint show_fill_level        : 1;
 145   guint restrict_to_fill_level : 1;
 146
 147   guint grab_button            : 8; /* 0 if none */
 148 };
 149
 150
 151 enum {
 152   PROP_0,
 153   PROP_ORIENTATION,
 154   PROP_ADJUSTMENT,
 155   PROP_INVERTED,
 156   PROP_LOWER_STEPPER_SENSITIVITY,
 157   PROP_UPPER_STEPPER_SENSITIVITY,
 158   PROP_SHOW_FILL_LEVEL,
 159   PROP_RESTRICT_TO_FILL_LEVEL,
 160   PROP_FILL_LEVEL,
 161   PROP_ROUND_DIGITS
 162 };
 163
 164 enum {
 165   VALUE_CHANGED,
 166   ADJUST_BOUNDS,
 167   MOVE_SLIDER,
 168   CHANGE_VALUE,
 169   LAST_SIGNAL
 170 };
 171
 172 typedef enum {
 173   STEPPER_A,
 174   STEPPER_B,
 175   STEPPER_C,
 176   STEPPER_D
 177 } Stepper;
 178
 179 static void gtk_range_set_property   (GObject          *object,
 180                                       guint             prop_id,
 181                                       const GValue     *value,
 182                                       GParamSpec       *pspec);
 183 static void gtk_range_get_property   (GObject          *object,
 184                                       guint             prop_id,
 185                                       GValue           *value,
 186                                       GParamSpec       *pspec);
 187 static void gtk_range_destroy        (GtkWidget        *widget);
 188 static void gtk_range_get_preferred_width
 189                                      (GtkWidget        *widget,
 190                                       gint             *minimum,
 191                                       gint             *natural);
 192 static void gtk_range_get_preferred_height
 193                                      (GtkWidget        *widget,
 194                                       gint             *minimum,
 195                                       gint             *natural);
 196 static void gtk_range_size_allocate  (GtkWidget        *widget,
 197                                       GtkAllocation    *allocation);
 198 static void gtk_range_hierarchy_changed (GtkWidget     *widget,
 199                                          GtkWidget     *previous_toplevel);
 200 static void gtk_range_realize        (GtkWidget        *widget);
 201 static void gtk_range_unrealize      (GtkWidget        *widget);
 202 static void gtk_range_map            (GtkWidget        *widget);
 203 static void gtk_range_unmap          (GtkWidget        *widget);
 204 static gboolean gtk_range_draw       (GtkWidget        *widget,
 205                                       cairo_t          *cr);
 206 static gboolean gtk_range_button_press   (GtkWidget        *widget,
 207                                       GdkEventButton   *event);
 208 static gboolean gtk_range_button_release (GtkWidget        *widget,
 209                                       GdkEventButton   *event);
 210 static gboolean gtk_range_motion_notify  (GtkWidget        *widget,
 211                                       GdkEventMotion   *event);
 212 static gboolean gtk_range_enter_notify   (GtkWidget        *widget,
 213                                       GdkEventCrossing *event);
 214 static gboolean gtk_range_leave_notify   (GtkWidget        *widget,
 215                                       GdkEventCrossing *event);
 216 static gboolean gtk_range_grab_broken (GtkWidget          *widget,
 217                                        GdkEventGrabBroken *event);
 218 static void gtk_range_grab_notify    (GtkWidget          *widget,
 219                                       gboolean            was_grabbed);
 220 static void gtk_range_state_flags_changed  (GtkWidget      *widget,
 221                                             GtkStateFlags   previous_state);
 222 static gboolean gtk_range_scroll_event   (GtkWidget        *widget,
 223                                       GdkEventScroll   *event);
 224 static void gtk_range_style_updated  (GtkWidget        *widget);
 225 static void update_slider_position   (GtkRange         *range,
 226                                       gint              mouse_x,
 227                                       gint              mouse_y);
 228 static void stop_scrolling           (GtkRange         *range);
 229 static gboolean modify_allocation_for_window_grip (GtkWidget     *widget,
 230                                                    GtkAllocation *allocation);
 231
 232 /* Range methods */
 233
 234 static void gtk_range_move_slider              (GtkRange         *range,
 235                                                 GtkScrollType     scroll);
 236
 237 /* Internals */
 238 static gboolean      gtk_range_scroll                   (GtkRange      *range,
 239                                                          GtkScrollType  scroll);
 240 static gboolean      gtk_range_update_mouse_location    (GtkRange      *range);
 241 static void          gtk_range_calc_layout              (GtkRange      *range,
 242                                                          gdouble        adjustment_value);
 243 static void          gtk_range_calc_marks               (GtkRange      *range);
 244 static void          gtk_range_get_props                (GtkRange      *range,
 245                                                          gint          *slider_width,
 246                                                          gint          *stepper_size,
 247                                                          gint          *focus_width,
 248                                                          gint          *trough_border,
 249                                                          gint          *stepper_spacing,
 250                                                          gboolean      *trough_under_steppers,
 251                                                          gint          *arrow_displacement_x,
 252                                                          gint          *arrow_displacement_y);
 253 static void          gtk_range_calc_request             (GtkRange      *range,
 254                                                          gint           slider_width,
 255                                                          gint           stepper_size,
 256                                                          gint           focus_width,
 257                                                          gint           trough_border,
 258                                                          gint           stepper_spacing,
 259                                                          GdkRectangle  *range_rect,
 260                                                          GtkBorder     *border,
 261                                                          gint          *n_steppers_p,
 262                                                          gboolean      *has_steppers_ab,
 263                                                          gboolean      *has_steppers_cd,
 264                                                          gint          *slider_length_p);
 265 static void          gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
 266                                                          gpointer       data);
 267 static void          gtk_range_adjustment_changed       (GtkAdjustment *adjustment,
 268                                                          gpointer       data);
 269 static void          gtk_range_add_step_timer           (GtkRange      *range,
 270                                                          GtkScrollType  step);
 271 static void          gtk_range_remove_step_timer        (GtkRange      *range);
 272 static GdkRectangle* get_area                           (GtkRange      *range,
 273                                                          MouseLocation  location);
 274 static gboolean      gtk_range_real_change_value        (GtkRange      *range,
 275                                                          GtkScrollType  scroll,
 276                                                          gdouble        value);
 277 static gboolean      gtk_range_key_press                (GtkWidget     *range,
 278                                                          GdkEventKey   *event);
 279
 280
 281 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GtkRange, gtk_range, GTK_TYPE_WIDGET,
 282                                   G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 283                                                          NULL))
 284
 285 static guint signals[LAST_SIGNAL];
 286
 287
 288 static void
 289 gtk_range_class_init (GtkRangeClass *class)
 290 {
 291   GObjectClass   *gobject_class;
 292   GtkWidgetClass *widget_class;
 293
 294   gobject_class = G_OBJECT_CLASS (class);
 295   widget_class = (GtkWidgetClass*) class;
 296
 297   gobject_class->set_property = gtk_range_set_property;
 298   gobject_class->get_property = gtk_range_get_property;
 299
 300   widget_class->destroy = gtk_range_destroy;
 301   widget_class->get_preferred_width = gtk_range_get_preferred_width;
 302   widget_class->get_preferred_height = gtk_range_get_preferred_height;
 303   widget_class->size_allocate = gtk_range_size_allocate;
 304   widget_class->hierarchy_changed = gtk_range_hierarchy_changed;
 305   widget_class->realize = gtk_range_realize;
 306   widget_class->unrealize = gtk_range_unrealize;
 307   widget_class->map = gtk_range_map;
 308   widget_class->unmap = gtk_range_unmap;
 309   widget_class->draw = gtk_range_draw;
 310   widget_class->button_press_event = gtk_range_button_press;
 311   widget_class->button_release_event = gtk_range_button_release;
 312   widget_class->motion_notify_event = gtk_range_motion_notify;
 313   widget_class->scroll_event = gtk_range_scroll_event;
 314   widget_class->enter_notify_event = gtk_range_enter_notify;
 315   widget_class->leave_notify_event = gtk_range_leave_notify;
 316   widget_class->grab_broken_event = gtk_range_grab_broken;
 317   widget_class->grab_notify = gtk_range_grab_notify;
 318   widget_class->state_flags_changed = gtk_range_state_flags_changed;
 319   widget_class->style_updated = gtk_range_style_updated;
 320   widget_class->key_press_event = gtk_range_key_press;
 321
 322   class->move_slider = gtk_range_move_slider;
 323   class->change_value = gtk_range_real_change_value;
 324
 325   class->slider_detail = "slider";
 326   class->stepper_detail = "stepper";
 327
 328   /**
 329    * GtkRange::value-changed:
 330    * @range: the #GtkRange that received the signal
 331    *
 332    * Emitted when the range value changes.
 333    */
 334   signals[VALUE_CHANGED] =
 335     g_signal_new (I_("value-changed"),
 336                   G_TYPE_FROM_CLASS (gobject_class),
 337                   G_SIGNAL_RUN_LAST,
 338                   G_STRUCT_OFFSET (GtkRangeClass, value_changed),
 339                   NULL, NULL,
 340                   _gtk_marshal_VOID__VOID,
 341                   G_TYPE_NONE, 0);
 342
 343   /**
 344    * GtkRange::adjust-bounds:
 345    * @range: the #GtkRange that received the signal
 346    * @value: the value before we clamp
 347    *
 348    * Emitted before clamping a value, to give the application a
 349    * chance to adjust the bounds.
 350    */
 351   signals[ADJUST_BOUNDS] =
 352     g_signal_new (I_("adjust-bounds"),
 353                   G_TYPE_FROM_CLASS (gobject_class),
 354                   G_SIGNAL_RUN_LAST,
 355                   G_STRUCT_OFFSET (GtkRangeClass, adjust_bounds),
 356                   NULL, NULL,
 357                   _gtk_marshal_VOID__DOUBLE,
 358                   G_TYPE_NONE, 1,
 359                   G_TYPE_DOUBLE);
 360
 361   /**
 362    * GtkRange::move-slider:
 363    * @range: the #GtkRange that received the signal
 364    * @step: how to move the slider
 365    *
 366    * Virtual function that moves the slider. Used for keybindings.
 367    */
 368   signals[MOVE_SLIDER] =
 369     g_signal_new (I_("move-slider"),
 370                   G_TYPE_FROM_CLASS (gobject_class),
 371                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 372                   G_STRUCT_OFFSET (GtkRangeClass, move_slider),
 373                   NULL, NULL,
 374                   _gtk_marshal_VOID__ENUM,
 375                   G_TYPE_NONE, 1,
 376                   GTK_TYPE_SCROLL_TYPE);
 377
 378   /**
 379    * GtkRange::change-value:
 380    * @range: the #GtkRange that received the signal
 381    * @scroll: the type of scroll action that was performed
 382    * @value: the new value resulting from the scroll action
 383    *
 384    * The #GtkRange::change-value signal is emitted when a scroll action is
 385    * performed on a range.  It allows an application to determine the
 386    * type of scroll event that occurred and the resultant new value.
 387    * The application can handle the event itself and return %TRUE to
 388    * prevent further processing.  Or, by returning %FALSE, it can pass
 389    * the event to other handlers until the default GTK+ handler is
 390    * reached.
 391    *
 392    * The value parameter is unrounded.  An application that overrides
 393    * the GtkRange::change-value signal is responsible for clamping the
 394    * value to the desired number of decimal digits; the default GTK+
 395    * handler clamps the value based on #GtkRange:round-digits.
 396    *
 397    * It is not possible to use delayed update policies in an overridden
 398    * #GtkRange::change-value handler.
 399    *
 400    * Returns: %TRUE to prevent other handlers from being invoked for
 401    *     the signal, %FALSE to propagate the signal further
 402    *
 403    * Since: 2.6
 404    */
 405   signals[CHANGE_VALUE] =
 406     g_signal_new (I_("change-value"),
 407                   G_TYPE_FROM_CLASS (gobject_class),
 408                   G_SIGNAL_RUN_LAST,
 409                   G_STRUCT_OFFSET (GtkRangeClass, change_value),
 410                   _gtk_boolean_handled_accumulator, NULL,
 411                   _gtk_marshal_BOOLEAN__ENUM_DOUBLE,
 412                   G_TYPE_BOOLEAN, 2,
 413                   GTK_TYPE_SCROLL_TYPE,
 414                   G_TYPE_DOUBLE);
 415
 416   g_object_class_override_property (gobject_class,
 417                                     PROP_ORIENTATION,
 418                                     "orientation");
 419
 420   g_object_class_install_property (gobject_class,
 421                                    PROP_ADJUSTMENT,
 422                                    g_param_spec_object ("adjustment",
 423                                                         P_("Adjustment"),
 424                                                         P_("The GtkAdjustment that contains the current value of this range object"),
 425                                                         GTK_TYPE_ADJUSTMENT,
 426                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 427
 428   g_object_class_install_property (gobject_class,
 429                                    PROP_INVERTED,
 430                                    g_param_spec_boolean ("inverted",
 431                                                         P_("Inverted"),
 432                                                         P_("Invert direction slider moves to increase range value"),
 433                                                          FALSE,
 434                                                          GTK_PARAM_READWRITE));
 435
 436   g_object_class_install_property (gobject_class,
 437                                    PROP_LOWER_STEPPER_SENSITIVITY,
 438                                    g_param_spec_enum ("lower-stepper-sensitivity",
 439                                                       P_("Lower stepper sensitivity"),
 440                                                       P_("The sensitivity policy for the stepper that points to the adjustment's lower side"),
 441                                                       GTK_TYPE_SENSITIVITY_TYPE,
 442                                                       GTK_SENSITIVITY_AUTO,
 443                                                       GTK_PARAM_READWRITE));
 444
 445   g_object_class_install_property (gobject_class,
 446                                    PROP_UPPER_STEPPER_SENSITIVITY,
 447                                    g_param_spec_enum ("upper-stepper-sensitivity",
 448                                                       P_("Upper stepper sensitivity"),
 449                                                       P_("The sensitivity policy for the stepper that points to the adjustment's upper side"),
 450                                                       GTK_TYPE_SENSITIVITY_TYPE,
 451                                                       GTK_SENSITIVITY_AUTO,
 452                                                       GTK_PARAM_READWRITE));
 453
 454   /**
 455    * GtkRange:show-fill-level:
 456    *
 457    * The show-fill-level property controls whether fill level indicator
 458    * graphics are displayed on the trough. See
 459    * gtk_range_set_show_fill_level().
 460    *
 461    * Since: 2.12
 462    **/
 463   g_object_class_install_property (gobject_class,
 464                                    PROP_SHOW_FILL_LEVEL,
 465                                    g_param_spec_boolean ("show-fill-level",
 466                                                          P_("Show Fill Level"),
 467                                                          P_("Whether to display a fill level indicator graphics on trough."),
 468                                                          FALSE,
 469                                                          GTK_PARAM_READWRITE));
 470
 471   /**
 472    * GtkRange:restrict-to-fill-level:
 473    *
 474    * The restrict-to-fill-level property controls whether slider
 475    * movement is restricted to an upper boundary set by the
 476    * fill level. See gtk_range_set_restrict_to_fill_level().
 477    *
 478    * Since: 2.12
 479    **/
 480   g_object_class_install_property (gobject_class,
 481                                    PROP_RESTRICT_TO_FILL_LEVEL,
 482                                    g_param_spec_boolean ("restrict-to-fill-level",
 483                                                          P_("Restrict to Fill Level"),
 484                                                          P_("Whether to restrict the upper boundary to the fill level."),
 485                                                          TRUE,
 486                                                          GTK_PARAM_READWRITE));
 487
 488   /**
 489    * GtkRange:fill-level:
 490    *
 491    * The fill level (e.g. prebuffering of a network stream).
 492    * See gtk_range_set_fill_level().
 493    *
 494    * Since: 2.12
 495    **/
 496   g_object_class_install_property (gobject_class,
 497                                    PROP_FILL_LEVEL,
 498                                    g_param_spec_double ("fill-level",
 499                                                         P_("Fill Level"),
 500                                                         P_("The fill level."),
 501                                                         -G_MAXDOUBLE,
 502                                                         G_MAXDOUBLE,
 503                                                         G_MAXDOUBLE,
 504                                                         GTK_PARAM_READWRITE));
 505
 506   /**
 507    * GtkRange:round-digits:
 508    *
 509    * The number of digits to round the value to when
 510    * it changes, or -1. See #GtkRange::change-value.
 511    *
 512    * Since: 2.24
 513    */
 514   g_object_class_install_property (gobject_class,
 515                                    PROP_ROUND_DIGITS,
 516                                    g_param_spec_int ("round-digits",
 517                                                      P_("Round Digits"),
 518                                                      P_("The number of digits to round the value to."),
 519                                                      -1,
 520                                                      G_MAXINT,
 521                                                      -1,
 522                                                      GTK_PARAM_READWRITE));
 523
 524   gtk_widget_class_install_style_property (widget_class,
 525                                            g_param_spec_int ("slider-width",
 526                                                              P_("Slider Width"),
 527                                                              P_("Width of scrollbar or scale thumb"),
 528                                                              0,
 529                                                              G_MAXINT,
 530                                                              14,
 531                                                              GTK_PARAM_READABLE));
 532   gtk_widget_class_install_style_property (widget_class,
 533                                            g_param_spec_int ("trough-border",
 534                                                              P_("Trough Border"),
 535                                                              P_("Spacing between thumb/steppers and outer trough bevel"),
 536                                                              0,
 537                                                              G_MAXINT,
 538                                                              1,
 539                                                              GTK_PARAM_READABLE));
 540   gtk_widget_class_install_style_property (widget_class,
 541                                            g_param_spec_int ("stepper-size",
 542                                                              P_("Stepper Size"),
 543                                                              P_("Length of step buttons at ends"),
 544                                                              0,
 545                                                              G_MAXINT,
 546                                                              14,
 547                                                              GTK_PARAM_READABLE));
 548   /**
 549    * GtkRange:stepper-spacing:
 550    *
 551    * The spacing between the stepper buttons and thumb. Note that
 552    * stepper-spacing won't have any effect if there are no steppers.
 553    */
 554   gtk_widget_class_install_style_property (widget_class,
 555                                            g_param_spec_int ("stepper-spacing",
 556                                                              P_("Stepper Spacing"),
 557                                                              P_("Spacing between step buttons and thumb"),
 558                                                              0,
 559                                                              G_MAXINT,
 560                                                              0,
 561                                                              GTK_PARAM_READABLE));
 562   gtk_widget_class_install_style_property (widget_class,
 563                                            g_param_spec_int ("arrow-displacement-x",
 564                                                              P_("Arrow X Displacement"),
 565                                                              P_("How far in the x direction to move the arrow when the button is depressed"),
 566                                                              G_MININT,
 567                                                              G_MAXINT,
 568                                                              0,
 569                                                              GTK_PARAM_READABLE));
 570   gtk_widget_class_install_style_property (widget_class,
 571                                            g_param_spec_int ("arrow-displacement-y",
 572                                                              P_("Arrow Y Displacement"),
 573                                                              P_("How far in the y direction to move the arrow when the button is depressed"),
 574                                                              G_MININT,
 575                                                              G_MAXINT,
 576                                                              0,
 577                                                              GTK_PARAM_READABLE));
 578
 579   /**
 580    * GtkRange:trough-under-steppers:
 581    *
 582    * Whether to draw the trough across the full length of the range or
 583    * to exclude the steppers and their spacing.
 584    *
 585    * Since: 2.10
 586    */
 587   gtk_widget_class_install_style_property (widget_class,
 588                                            g_param_spec_boolean ("trough-under-steppers",
 589                                                                  P_("Trough Under Steppers"),
 590                                                                  P_("Whether to draw trough for full length of range or exclude the steppers and spacing"),
 591                                                                  TRUE,
 592                                                                  GTK_PARAM_READABLE));
 593
 594   /**
 595    * GtkRange:arrow-scaling:
 596    *
 597    * The arrow size proportion relative to the scroll button size.
 598    *
 599    * Since: 2.14
 600    */
 601   gtk_widget_class_install_style_property (widget_class,
 602                                            g_param_spec_float ("arrow-scaling",
 603                                                                P_("Arrow scaling"),
 604                                                                P_("Arrow scaling with regard to scroll button size"),
 605                                                                0.0, 1.0, 0.5,
 606                                                                GTK_PARAM_READABLE));
 607
 608   g_type_class_add_private (class, sizeof (GtkRangePrivate));
 609
 610   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_RANGE_ACCESSIBLE);
 611 }
 612
 613 static void
 614 gtk_range_set_property (GObject      *object,
 615                         guint         prop_id,
 616                         const GValue *value,
 617                         GParamSpec   *pspec)
 618 {
 619   GtkRange *range = GTK_RANGE (object);
 620   GtkRangePrivate *priv = range->priv;
 621
 622   switch (prop_id)
 623     {
 624     case PROP_ORIENTATION:
 625       priv->orientation = g_value_get_enum (value);
 626
 627       priv->slider_detail_quark = 0;
 628       priv->stepper_detail_quark[0] = 0;
 629       priv->stepper_detail_quark[1] = 0;
 630       priv->stepper_detail_quark[2] = 0;
 631       priv->stepper_detail_quark[3] = 0;
 632
 633       _gtk_orientable_set_style_classes (GTK_ORIENTABLE (range));
 634       gtk_widget_queue_resize (GTK_WIDGET (range));
 635       break;
 636     case PROP_ADJUSTMENT:
 637       gtk_range_set_adjustment (range, g_value_get_object (value));
 638       break;
 639     case PROP_INVERTED:
 640       gtk_range_set_inverted (range, g_value_get_boolean (value));
 641       break;
 642     case PROP_LOWER_STEPPER_SENSITIVITY:
 643       gtk_range_set_lower_stepper_sensitivity (range, g_value_get_enum (value));
 644       break;
 645     case PROP_UPPER_STEPPER_SENSITIVITY:
 646       gtk_range_set_upper_stepper_sensitivity (range, g_value_get_enum (value));
 647       break;
 648     case PROP_SHOW_FILL_LEVEL:
 649       gtk_range_set_show_fill_level (range, g_value_get_boolean (value));
 650       break;
 651     case PROP_RESTRICT_TO_FILL_LEVEL:
 652       gtk_range_set_restrict_to_fill_level (range, g_value_get_boolean (value));
 653       break;
 654     case PROP_FILL_LEVEL:
 655       gtk_range_set_fill_level (range, g_value_get_double (value));
 656       break;
 657     case PROP_ROUND_DIGITS:
 658       gtk_range_set_round_digits (range, g_value_get_int (value));
 659       break;
 660     default:
 661       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 662       break;
 663     }
 664 }
 665
 666 static void
 667 gtk_range_get_property (GObject      *object,
 668                         guint         prop_id,
 669                         GValue       *value,
 670                         GParamSpec   *pspec)
 671 {
 672   GtkRange *range = GTK_RANGE (object);
 673   GtkRangePrivate *priv = range->priv;
 674
 675   switch (prop_id)
 676     {
 677     case PROP_ORIENTATION:
 678       g_value_set_enum (value, priv->orientation);
 679       break;
 680     case PROP_ADJUSTMENT:
 681       g_value_set_object (value, priv->adjustment);
 682       break;
 683     case PROP_INVERTED:
 684       g_value_set_boolean (value, priv->inverted);
 685       break;
 686     case PROP_LOWER_STEPPER_SENSITIVITY:
 687       g_value_set_enum (value, gtk_range_get_lower_stepper_sensitivity (range));
 688       break;
 689     case PROP_UPPER_STEPPER_SENSITIVITY:
 690       g_value_set_enum (value, gtk_range_get_upper_stepper_sensitivity (range));
 691       break;
 692     case PROP_SHOW_FILL_LEVEL:
 693       g_value_set_boolean (value, gtk_range_get_show_fill_level (range));
 694       break;
 695     case PROP_RESTRICT_TO_FILL_LEVEL:
 696       g_value_set_boolean (value, gtk_range_get_restrict_to_fill_level (range));
 697       break;
 698     case PROP_FILL_LEVEL:
 699       g_value_set_double (value, gtk_range_get_fill_level (range));
 700       break;
 701     case PROP_ROUND_DIGITS:
 702       g_value_set_int (value, gtk_range_get_round_digits (range));
 703       break;
 704     default:
 705       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 706       break;
 707     }
 708 }
 709
 710 static void
 711 gtk_range_init (GtkRange *range)
 712 {
 713   GtkRangePrivate *priv;
 714
 715   range->priv = G_TYPE_INSTANCE_GET_PRIVATE (range,
 716                                              GTK_TYPE_RANGE,
 717                                              GtkRangePrivate);
 718   priv = range->priv;
 719
 720   gtk_widget_set_has_window (GTK_WIDGET (range), FALSE);
 721
 722   priv->orientation = GTK_ORIENTATION_HORIZONTAL;
 723   priv->adjustment = NULL;
 724   priv->inverted = FALSE;
 725   priv->flippable = FALSE;
 726   priv->min_slider_size = 1;
 727   priv->has_stepper_a = FALSE;
 728   priv->has_stepper_b = FALSE;
 729   priv->has_stepper_c = FALSE;
 730   priv->has_stepper_d = FALSE;
 731   priv->need_recalc = TRUE;
 732   priv->round_digits = -1;
 733   priv->mouse_location = MOUSE_OUTSIDE;
 734   priv->mouse_x = -1;
 735   priv->mouse_y = -1;
 736   priv->grab_location = MOUSE_OUTSIDE;
 737   priv->grab_button = 0;
 738   priv->lower_sensitivity = GTK_SENSITIVITY_AUTO;
 739   priv->upper_sensitivity = GTK_SENSITIVITY_AUTO;
 740   priv->lower_sensitive = TRUE;
 741   priv->upper_sensitive = TRUE;
 742   priv->has_origin = FALSE;
 743   priv->show_fill_level = FALSE;
 744   priv->restrict_to_fill_level = TRUE;
 745   priv->fill_level = G_MAXDOUBLE;
 746   priv->timer = NULL;
 747 }
 748
 749 /**
 750  * gtk_range_get_adjustment:
 751  * @range: a #GtkRange
 752  *
 753  * Get the #GtkAdjustment which is the "model" object for #GtkRange.
 754  * See gtk_range_set_adjustment() for details.
 755  * The return value does not have a reference added, so should not
 756  * be unreferenced.
 757  *
 758  * Return value: (transfer none): a #GtkAdjustment
 759  **/
 760 GtkAdjustment*
 761 gtk_range_get_adjustment (GtkRange *range)
 762 {
 763   GtkRangePrivate *priv;
 764
 765   g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
 766
 767   priv = range->priv;
 768
 769   if (!priv->adjustment)
 770     gtk_range_set_adjustment (range, NULL);
 771
 772   return priv->adjustment;
 773 }
 774
 775 /**
 776  * gtk_range_set_adjustment:
 777  * @range: a #GtkRange
 778  * @adjustment: a #GtkAdjustment
 779  *
 780  * Sets the adjustment to be used as the "model" object for this range
 781  * widget. The adjustment indicates the current range value, the
 782  * minimum and maximum range values, the step/page increments used
 783  * for keybindings and scrolling, and the page size. The page size
 784  * is normally 0 for #GtkScale and nonzero for #GtkScrollbar, and
 785  * indicates the size of the visible area of the widget being scrolled.
 786  * The page size affects the size of the scrollbar slider.
 787  **/
 788 void
 789 gtk_range_set_adjustment (GtkRange      *range,
 790                           GtkAdjustment *adjustment)
 791 {
 792   GtkRangePrivate *priv;
 793
 794   g_return_if_fail (GTK_IS_RANGE (range));
 795
 796   priv = range->priv;
 797
 798   if (!adjustment)
 799     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 800   else
 801     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 802
 803   if (priv->adjustment != adjustment)
 804     {
 805       if (priv->adjustment)
 806         {
 807           g_signal_handlers_disconnect_by_func (priv->adjustment,
 808                                                 gtk_range_adjustment_changed,
 809                                                 range);
 810           g_signal_handlers_disconnect_by_func (priv->adjustment,
 811                                                 gtk_range_adjustment_value_changed,
 812                                                 range);
 813           g_object_unref (priv->adjustment);
 814         }
 815
 816       priv->adjustment = adjustment;
 817       g_object_ref_sink (adjustment);
 818
 819       g_signal_connect (adjustment, "changed",
 820                         G_CALLBACK (gtk_range_adjustment_changed),
 821                         range);
 822       g_signal_connect (adjustment, "value-changed",
 823                         G_CALLBACK (gtk_range_adjustment_value_changed),
 824                         range);
 825
 826       gtk_range_adjustment_changed (adjustment, range);
 827       g_object_notify (G_OBJECT (range), "adjustment");
 828     }
 829 }
 830
 831 /**
 832  * gtk_range_set_inverted:
 833  * @range: a #GtkRange
 834  * @setting: %TRUE to invert the range
 835  *
 836  * Ranges normally move from lower to higher values as the
 837  * slider moves from top to bottom or left to right. Inverted
 838  * ranges have higher values at the top or on the right rather than
 839  * on the bottom or left.
 840  **/
 841 void
 842 gtk_range_set_inverted (GtkRange *range,
 843                         gboolean  setting)
 844 {
 845   GtkRangePrivate *priv;
 846
 847   g_return_if_fail (GTK_IS_RANGE (range));
 848
 849   priv = range->priv;
 850
 851   setting = setting != FALSE;
 852
 853   if (setting != priv->inverted)
 854     {
 855       priv->inverted = setting;
 856       g_object_notify (G_OBJECT (range), "inverted");
 857       gtk_widget_queue_resize (GTK_WIDGET (range));
 858     }
 859 }
 860
 861 /**
 862  * gtk_range_get_inverted:
 863  * @range: a #GtkRange
 864  *
 865  * Gets the value set by gtk_range_set_inverted().
 866  *
 867  * Return value: %TRUE if the range is inverted
 868  **/
 869 gboolean
 870 gtk_range_get_inverted (GtkRange *range)
 871 {
 872   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 873
 874   return range->priv->inverted;
 875 }
 876
 877 /**
 878  * gtk_range_set_flippable:
 879  * @range: a #GtkRange
 880  * @flippable: %TRUE to make the range flippable
 881  *
 882  * If a range is flippable, it will switch its direction if it is
 883  * horizontal and its direction is %GTK_TEXT_DIR_RTL.
 884  *
 885  * See gtk_widget_get_direction().
 886  *
 887  * Since: 2.18
 888  **/
 889 void
 890 gtk_range_set_flippable (GtkRange *range,
 891                          gboolean  flippable)
 892 {
 893   GtkRangePrivate *priv;
 894
 895   g_return_if_fail (GTK_IS_RANGE (range));
 896
 897   priv = range->priv;
 898
 899   flippable = flippable ? TRUE : FALSE;
 900
 901   if (flippable != priv->flippable)
 902     {
 903       priv->flippable = flippable;
 904
 905       gtk_widget_queue_draw (GTK_WIDGET (range));
 906     }
 907 }
 908
 909 /**
 910  * gtk_range_get_flippable:
 911  * @range: a #GtkRange
 912  *
 913  * Gets the value set by gtk_range_set_flippable().
 914  *
 915  * Return value: %TRUE if the range is flippable
 916  *
 917  * Since: 2.18
 918  **/
 919 gboolean
 920 gtk_range_get_flippable (GtkRange *range)
 921 {
 922   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 923
 924   return range->priv->flippable;
 925 }
 926
 927 /**
 928  * gtk_range_set_slider_size_fixed:
 929  * @range: a #GtkRange
 930  * @size_fixed: %TRUE to make the slider size constant
 931  *
 932  * Sets whether the range's slider has a fixed size, or a size that
 933  * depends on its adjustment's page size.
 934  *
 935  * This function is useful mainly for #GtkRange subclasses.
 936  *
 937  * Since: 2.20
 938  **/
 939 void
 940 gtk_range_set_slider_size_fixed (GtkRange *range,
 941                                  gboolean  size_fixed)
 942 {
 943   GtkRangePrivate *priv;
 944
 945   g_return_if_fail (GTK_IS_RANGE (range));
 946
 947   priv = range->priv;
 948
 949   if (size_fixed != priv->slider_size_fixed)
 950     {
 951       priv->slider_size_fixed = size_fixed ? TRUE : FALSE;
 952
 953       if (priv->adjustment && gtk_widget_get_mapped (GTK_WIDGET (range)))
 954         {
 955           priv->need_recalc = TRUE;
 956           gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
 957           gtk_widget_queue_draw (GTK_WIDGET (range));
 958         }
 959     }
 960 }
 961
 962 /**
 963  * gtk_range_get_slider_size_fixed:
 964  * @range: a #GtkRange
 965  *
 966  * This function is useful mainly for #GtkRange subclasses.
 967  *
 968  * See gtk_range_set_slider_size_fixed().
 969  *
 970  * Return value: whether the range's slider has a fixed size.
 971  *
 972  * Since: 2.20
 973  **/
 974 gboolean
 975 gtk_range_get_slider_size_fixed (GtkRange *range)
 976 {
 977   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 978
 979   return range->priv->slider_size_fixed;
 980 }
 981
 982 /**
 983  * gtk_range_set_min_slider_size:
 984  * @range: a #GtkRange
 985  * @min_size: The slider's minimum size
 986  *
 987  * Sets the minimum size of the range's slider.
 988  *
 989  * This function is useful mainly for #GtkRange subclasses.
 990  *
 991  * Since: 2.20
 992  **/
 993 void
 994 gtk_range_set_min_slider_size (GtkRange *range,
 995                                gint      min_size)
 996 {
 997   GtkRangePrivate *priv;
 998
 999   g_return_if_fail (GTK_IS_RANGE (range));
1000   g_return_if_fail (min_size > 0);
1001
1002   priv = range->priv;
1003
1004   if (min_size != priv->min_slider_size)
1005     {
1006       priv->min_slider_size = min_size;
1007
1008       if (gtk_widget_is_drawable (GTK_WIDGET (range)))
1009         {
1010           priv->need_recalc = TRUE;
1011           gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1012           gtk_widget_queue_draw (GTK_WIDGET (range));
1013         }
1014     }
1015 }
1016
1017 /**
1018  * gtk_range_get_min_slider_size:
1019  * @range: a #GtkRange
1020  *
1021  * This function is useful mainly for #GtkRange subclasses.
1022  *
1023  * See gtk_range_set_min_slider_size().
1024  *
1025  * Return value: The minimum size of the range's slider.
1026  *
1027  * Since: 2.20
1028  **/
1029 gint
1030 gtk_range_get_min_slider_size (GtkRange *range)
1031 {
1032   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1033
1034   return range->priv->min_slider_size;
1035 }
1036
1037 /**
1038  * gtk_range_get_range_rect:
1039  * @range: a #GtkRange
1040  * @range_rect: (out): return location for the range rectangle
1041  *
1042  * This function returns the area that contains the range's trough
1043  * and its steppers, in widget->window coordinates.
1044  *
1045  * This function is useful mainly for #GtkRange subclasses.
1046  *
1047  * Since: 2.20
1048  **/
1049 void
1050 gtk_range_get_range_rect (GtkRange     *range,
1051                           GdkRectangle *range_rect)
1052 {
1053   GtkRangePrivate *priv;
1054
1055   g_return_if_fail (GTK_IS_RANGE (range));
1056   g_return_if_fail (range_rect != NULL);
1057
1058   priv = range->priv;
1059
1060   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1061
1062   *range_rect = priv->range_rect;
1063 }
1064
1065 /**
1066  * gtk_range_get_slider_range:
1067  * @range: a #GtkRange
1068  * @slider_start: (out) (allow-none): return location for the slider's
1069  *     start, or %NULL
1070  * @slider_end: (out) (allow-none): return location for the slider's
1071  *     end, or %NULL
1072  *
1073  * This function returns sliders range along the long dimension,
1074  * in widget->window coordinates.
1075  *
1076  * This function is useful mainly for #GtkRange subclasses.
1077  *
1078  * Since: 2.20
1079  **/
1080 void
1081 gtk_range_get_slider_range (GtkRange *range,
1082                             gint     *slider_start,
1083                             gint     *slider_end)
1084 {
1085   GtkRangePrivate *priv;
1086
1087   g_return_if_fail (GTK_IS_RANGE (range));
1088
1089   priv = range->priv;
1090
1091   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1092
1093   if (slider_start)
1094     *slider_start = priv->slider_start;
1095
1096   if (slider_end)
1097     *slider_end = priv->slider_end;
1098 }
1099
1100 /**
1101  * gtk_range_set_lower_stepper_sensitivity:
1102  * @range:       a #GtkRange
1103  * @sensitivity: the lower stepper's sensitivity policy.
1104  *
1105  * Sets the sensitivity policy for the stepper that points to the
1106  * 'lower' end of the GtkRange's adjustment.
1107  *
1108  * Since: 2.10
1109  **/
1110 void
1111 gtk_range_set_lower_stepper_sensitivity (GtkRange           *range,
1112                                          GtkSensitivityType  sensitivity)
1113 {
1114   GtkRangePrivate *priv;
1115
1116   g_return_if_fail (GTK_IS_RANGE (range));
1117
1118   priv = range->priv;
1119
1120   if (priv->lower_sensitivity != sensitivity)
1121     {
1122       priv->lower_sensitivity = sensitivity;
1123
1124       priv->need_recalc = TRUE;
1125       gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1126       gtk_widget_queue_draw (GTK_WIDGET (range));
1127
1128       g_object_notify (G_OBJECT (range), "lower-stepper-sensitivity");
1129     }
1130 }
1131
1132 /**
1133  * gtk_range_get_lower_stepper_sensitivity:
1134  * @range: a #GtkRange
1135  *
1136  * Gets the sensitivity policy for the stepper that points to the
1137  * 'lower' end of the GtkRange's adjustment.
1138  *
1139  * Return value: The lower stepper's sensitivity policy.
1140  *
1141  * Since: 2.10
1142  **/
1143 GtkSensitivityType
1144 gtk_range_get_lower_stepper_sensitivity (GtkRange *range)
1145 {
1146   g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
1147
1148   return range->priv->lower_sensitivity;
1149 }
1150
1151 /**
1152  * gtk_range_set_upper_stepper_sensitivity:
1153  * @range:       a #GtkRange
1154  * @sensitivity: the upper stepper's sensitivity policy.
1155  *
1156  * Sets the sensitivity policy for the stepper that points to the
1157  * 'upper' end of the GtkRange's adjustment.
1158  *
1159  * Since: 2.10
1160  **/
1161 void
1162 gtk_range_set_upper_stepper_sensitivity (GtkRange           *range,
1163                                          GtkSensitivityType  sensitivity)
1164 {
1165   GtkRangePrivate *priv;
1166
1167   g_return_if_fail (GTK_IS_RANGE (range));
1168
1169   priv = range->priv;
1170
1171   if (priv->upper_sensitivity != sensitivity)
1172     {
1173       priv->upper_sensitivity = sensitivity;
1174
1175       priv->need_recalc = TRUE;
1176       gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1177       gtk_widget_queue_draw (GTK_WIDGET (range));
1178
1179       g_object_notify (G_OBJECT (range), "upper-stepper-sensitivity");
1180     }
1181 }
1182
1183 /**
1184  * gtk_range_get_upper_stepper_sensitivity:
1185  * @range: a #GtkRange
1186  *
1187  * Gets the sensitivity policy for the stepper that points to the
1188  * 'upper' end of the GtkRange's adjustment.
1189  *
1190  * Return value: The upper stepper's sensitivity policy.
1191  *
1192  * Since: 2.10
1193  **/
1194 GtkSensitivityType
1195 gtk_range_get_upper_stepper_sensitivity (GtkRange *range)
1196 {
1197   g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
1198
1199   return range->priv->upper_sensitivity;
1200 }
1201
1202 /**
1203  * gtk_range_set_increments:
1204  * @range: a #GtkRange
1205  * @step: step size
1206  * @page: page size
1207  *
1208  * Sets the step and page sizes for the range.
1209  * The step size is used when the user clicks the #GtkScrollbar
1210  * arrows or moves #GtkScale via arrow keys. The page size
1211  * is used for example when moving via Page Up or Page Down keys.
1212  **/
1213 void
1214 gtk_range_set_increments (GtkRange *range,
1215                           gdouble   step,
1216                           gdouble   page)
1217 {
1218   GtkAdjustment *adjustment;
1219
1220   g_return_if_fail (GTK_IS_RANGE (range));
1221
1222   adjustment = range->priv->adjustment;
1223
1224   gtk_adjustment_configure (adjustment,
1225                             gtk_adjustment_get_value (adjustment),
1226                             gtk_adjustment_get_lower (adjustment),
1227                             gtk_adjustment_get_upper (adjustment),
1228                             step,
1229                             page,
1230                             gtk_adjustment_get_page_size (adjustment));
1231 }
1232
1233 /**
1234  * gtk_range_set_range:
1235  * @range: a #GtkRange
1236  * @min: minimum range value
1237  * @max: maximum range value
1238  *
1239  * Sets the allowable values in the #GtkRange, and clamps the range
1240  * value to be between @min and @max. (If the range has a non-zero
1241  * page size, it is clamped between @min and @max - page-size.)
1242  **/
1243 void
1244 gtk_range_set_range (GtkRange *range,
1245                      gdouble   min,
1246                      gdouble   max)
1247 {
1248   GtkRangePrivate *priv;
1249   GtkAdjustment *adjustment;
1250   gdouble value;
1251
1252   g_return_if_fail (GTK_IS_RANGE (range));
1253   g_return_if_fail (min <= max);
1254
1255   priv = range->priv;
1256   adjustment = priv->adjustment;
1257
1258   value = gtk_adjustment_get_value (adjustment);
1259   if (priv->restrict_to_fill_level)
1260     value = MIN (value, MAX (gtk_adjustment_get_lower (adjustment),
1261                              priv->fill_level));
1262
1263   gtk_adjustment_configure (adjustment,
1264                             value,
1265                             min,
1266                             max,
1267                             gtk_adjustment_get_step_increment (adjustment),
1268                             gtk_adjustment_get_page_increment (adjustment),
1269                             gtk_adjustment_get_page_size (adjustment));
1270 }
1271
1272 /**
1273  * gtk_range_set_value:
1274  * @range: a #GtkRange
1275  * @value: new value of the range
1276  *
1277  * Sets the current value of the range; if the value is outside the
1278  * minimum or maximum range values, it will be clamped to fit inside
1279  * them. The range emits the #GtkRange::value-changed signal if the
1280  * value changes.
1281  **/
1282 void
1283 gtk_range_set_value (GtkRange *range,
1284                      gdouble   value)
1285 {
1286   GtkRangePrivate *priv;
1287
1288   g_return_if_fail (GTK_IS_RANGE (range));
1289
1290   priv = range->priv;
1291
1292   if (priv->restrict_to_fill_level)
1293     value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment),
1294                              priv->fill_level));
1295
1296   gtk_adjustment_set_value (priv->adjustment, value);
1297 }
1298
1299 /**
1300  * gtk_range_get_value:
1301  * @range: a #GtkRange
1302  *
1303  * Gets the current value of the range.
1304  *
1305  * Return value: current value of the range.
1306  **/
1307 gdouble
1308 gtk_range_get_value (GtkRange *range)
1309 {
1310   g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
1311
1312   return gtk_adjustment_get_value (range->priv->adjustment);
1313 }
1314
1315 /**
1316  * gtk_range_set_show_fill_level:
1317  * @range:           A #GtkRange
1318  * @show_fill_level: Whether a fill level indicator graphics is shown.
1319  *
1320  * Sets whether a graphical fill level is show on the trough. See
1321  * gtk_range_set_fill_level() for a general description of the fill
1322  * level concept.
1323  *
1324  * Since: 2.12
1325  **/
1326 void
1327 gtk_range_set_show_fill_level (GtkRange *range,
1328                                gboolean  show_fill_level)
1329 {
1330   GtkRangePrivate *priv;
1331
1332   g_return_if_fail (GTK_IS_RANGE (range));
1333
1334   priv = range->priv;
1335
1336   show_fill_level = show_fill_level ? TRUE : FALSE;
1337
1338   if (show_fill_level != priv->show_fill_level)
1339     {
1340       priv->show_fill_level = show_fill_level;
1341       g_object_notify (G_OBJECT (range), "show-fill-level");
1342       gtk_widget_queue_draw (GTK_WIDGET (range));
1343     }
1344 }
1345
1346 /**
1347  * gtk_range_get_show_fill_level:
1348  * @range: A #GtkRange
1349  *
1350  * Gets whether the range displays the fill level graphically.
1351  *
1352  * Return value: %TRUE if @range shows the fill level.
1353  *
1354  * Since: 2.12
1355  **/
1356 gboolean
1357 gtk_range_get_show_fill_level (GtkRange *range)
1358 {
1359   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1360
1361   return range->priv->show_fill_level;
1362 }
1363
1364 /**
1365  * gtk_range_set_restrict_to_fill_level:
1366  * @range:                  A #GtkRange
1367  * @restrict_to_fill_level: Whether the fill level restricts slider movement.
1368  *
1369  * Sets whether the slider is restricted to the fill level. See
1370  * gtk_range_set_fill_level() for a general description of the fill
1371  * level concept.
1372  *
1373  * Since: 2.12
1374  **/
1375 void
1376 gtk_range_set_restrict_to_fill_level (GtkRange *range,
1377                                       gboolean  restrict_to_fill_level)
1378 {
1379   GtkRangePrivate *priv;
1380
1381   g_return_if_fail (GTK_IS_RANGE (range));
1382
1383   priv = range->priv;
1384
1385   restrict_to_fill_level = restrict_to_fill_level ? TRUE : FALSE;
1386
1387   if (restrict_to_fill_level != priv->restrict_to_fill_level)
1388     {
1389       priv->restrict_to_fill_level = restrict_to_fill_level;
1390       g_object_notify (G_OBJECT (range), "restrict-to-fill-level");
1391
1392       gtk_range_set_value (range, gtk_range_get_value (range));
1393     }
1394 }
1395
1396 /**
1397  * gtk_range_get_restrict_to_fill_level:
1398  * @range: A #GtkRange
1399  *
1400  * Gets whether the range is restricted to the fill level.
1401  *
1402  * Return value: %TRUE if @range is restricted to the fill level.
1403  *
1404  * Since: 2.12
1405  **/
1406 gboolean
1407 gtk_range_get_restrict_to_fill_level (GtkRange *range)
1408 {
1409   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1410
1411   return range->priv->restrict_to_fill_level;
1412 }
1413
1414 /**
1415  * gtk_range_set_fill_level:
1416  * @range: a #GtkRange
1417  * @fill_level: the new position of the fill level indicator
1418  *
1419  * Set the new position of the fill level indicator.
1420  *
1421  * The "fill level" is probably best described by its most prominent
1422  * use case, which is an indicator for the amount of pre-buffering in
1423  * a streaming media player. In that use case, the value of the range
1424  * would indicate the current play position, and the fill level would
1425  * be the position up to which the file/stream has been downloaded.
1426  *
1427  * This amount of prebuffering can be displayed on the range's trough
1428  * and is themeable separately from the trough. To enable fill level
1429  * display, use gtk_range_set_show_fill_level(). The range defaults
1430  * to not showing the fill level.
1431  *
1432  * Additionally, it's possible to restrict the range's slider position
1433  * to values which are smaller than the fill level. This is controller
1434  * by gtk_range_set_restrict_to_fill_level() and is by default
1435  * enabled.
1436  *
1437  * Since: 2.12
1438  **/
1439 void
1440 gtk_range_set_fill_level (GtkRange *range,
1441                           gdouble   fill_level)
1442 {
1443   GtkRangePrivate *priv;
1444
1445   g_return_if_fail (GTK_IS_RANGE (range));
1446
1447   priv = range->priv;
1448
1449   if (fill_level != priv->fill_level)
1450     {
1451       priv->fill_level = fill_level;
1452       g_object_notify (G_OBJECT (range), "fill-level");
1453
1454       if (priv->show_fill_level)
1455         gtk_widget_queue_draw (GTK_WIDGET (range));
1456
1457       if (priv->restrict_to_fill_level)
1458         gtk_range_set_value (range, gtk_range_get_value (range));
1459     }
1460 }
1461
1462 /**
1463  * gtk_range_get_fill_level:
1464  * @range: A #GtkRange
1465  *
1466  * Gets the current position of the fill level indicator.
1467  *
1468  * Return value: The current fill level
1469  *
1470  * Since: 2.12
1471  **/
1472 gdouble
1473 gtk_range_get_fill_level (GtkRange *range)
1474 {
1475   g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
1476
1477   return range->priv->fill_level;
1478 }
1479
1480 static gboolean
1481 should_invert (GtkRange *range)
1482 {
1483   GtkRangePrivate *priv = range->priv;
1484
1485   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1486     return
1487       (priv->inverted && !priv->flippable) ||
1488       (priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) ||
1489       (!priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
1490   else
1491     return priv->inverted;
1492 }
1493
1494 static void
1495 gtk_range_destroy (GtkWidget *widget)
1496 {
1497   GtkRange *range = GTK_RANGE (widget);
1498   GtkRangePrivate *priv = range->priv;
1499
1500   gtk_range_remove_step_timer (range);
1501
1502   if (priv->repaint_id)
1503     g_source_remove (priv->repaint_id);
1504   priv->repaint_id = 0;
1505
1506   if (priv->adjustment)
1507     {
1508       g_signal_handlers_disconnect_by_func (priv->adjustment,
1509                                             gtk_range_adjustment_changed,
1510                                             range);
1511       g_signal_handlers_disconnect_by_func (priv->adjustment,
1512                                             gtk_range_adjustment_value_changed,
1513                                             range);
1514       g_object_unref (priv->adjustment);
1515       priv->adjustment = NULL;
1516     }
1517
1518   if (priv->n_marks)
1519     {
1520       g_free (priv->marks);
1521       priv->marks = NULL;
1522       g_free (priv->mark_pos);
1523       priv->mark_pos = NULL;
1524       priv->n_marks = 0;
1525     }
1526
1527   GTK_WIDGET_CLASS (gtk_range_parent_class)->destroy (widget);
1528 }
1529
1530 static void
1531 gtk_range_get_preferred_width (GtkWidget *widget,
1532                                gint      *minimum,
1533                                gint      *natural)
1534 {
1535   GtkRange *range;
1536   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
1537   GdkRectangle range_rect;
1538   GtkBorder border;
1539
1540   range = GTK_RANGE (widget);
1541
1542   gtk_range_get_props (range,
1543                        &slider_width, &stepper_size,
1544                        &focus_width, &trough_border,
1545                        &stepper_spacing, NULL,
1546                        NULL, NULL);
1547
1548   gtk_range_calc_request (range,
1549                           slider_width, stepper_size,
1550                           focus_width, trough_border, stepper_spacing,
1551                           &range_rect, &border, NULL, NULL, NULL, NULL);
1552
1553   *minimum = *natural = range_rect.width + border.left + border.right;
1554 }
1555
1556 static void
1557 gtk_range_get_preferred_height (GtkWidget *widget,
1558                                 gint      *minimum,
1559                                 gint      *natural)
1560 {
1561   GtkRange *range;
1562   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
1563   GdkRectangle range_rect;
1564   GtkBorder border;
1565
1566   range = GTK_RANGE (widget);
1567
1568   gtk_range_get_props (range,
1569                        &slider_width, &stepper_size,
1570                        &focus_width, &trough_border,
1571                        &stepper_spacing, NULL,
1572                        NULL, NULL);
1573
1574   gtk_range_calc_request (range,
1575                           slider_width, stepper_size,
1576                           focus_width, trough_border, stepper_spacing,
1577                           &range_rect, &border, NULL, NULL, NULL, NULL);
1578
1579   *minimum = *natural = range_rect.height + border.top + border.bottom;
1580 }
1581
1582 static gboolean
1583 modify_allocation_for_window_grip (GtkWidget     *widget,
1584                                    GtkAllocation *allocation)
1585 {
1586   GtkRange *range = GTK_RANGE (widget);
1587   GtkRangePrivate *priv = range->priv;
1588   GtkWidget *window, *parent;
1589   GdkRectangle grip_rect;
1590   GdkRectangle translated_rect;
1591   gint x;
1592   gint y;
1593
1594   window = gtk_widget_get_toplevel (widget);
1595   if (!GTK_IS_WINDOW (window))
1596     return FALSE;
1597
1598   if (!gtk_window_resize_grip_is_visible (GTK_WINDOW (window)))
1599     return FALSE;
1600
1601   /* Get the area of the window's corner grip */
1602   gtk_window_get_resize_grip_area (GTK_WINDOW (window), &grip_rect);
1603
1604   x = 0;
1605   y = 0;
1606
1607   /* Translate the stepper's area into window coords.
1608    * This is slightly tricky. We can't just use
1609    * gtk_widget_translate_coordinates (widget, window, 0, 0, &x, &y)
1610    * since that translates wrt to the _current_ allocation
1611    * and will lead to alternating between overlap and nonoverlap
1612    * for successive allocations.
1613    * Therefore, we find the window-widget to whose window allocation
1614    * is relative, and translate from there upwards.
1615    */
1616   parent = widget;
1617   while (gtk_widget_get_window (parent) == gtk_widget_get_window (widget) &&
1618          parent != window)
1619     {
1620       parent = gtk_widget_get_parent (parent);
1621     }
1622
1623   if (parent == window)
1624     translated_rect = *allocation;
1625   else
1626     {
1627       gtk_widget_translate_coordinates (parent,
1628                                         window,
1629                                         allocation->x, allocation->y,
1630                                         &x, &y);
1631       translated_rect.x = x;
1632       translated_rect.y = y;
1633       translated_rect.width = allocation->width;
1634       translated_rect.height = allocation->height;
1635     }
1636
1637   /* If the stepper button intersects the window resize grip.. */
1638   if (gdk_rectangle_intersect (&grip_rect, &translated_rect, &grip_rect))
1639     {
1640       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1641         {
1642           allocation->width -= grip_rect.width;
1643           if (gtk_widget_get_direction (window) == GTK_TEXT_DIR_RTL)
1644             allocation->x += grip_rect.width;
1645         }
1646       else
1647         {
1648           allocation->height -= grip_rect.height;
1649         }
1650
1651       return TRUE;
1652     }
1653
1654   return FALSE;
1655 }
1656
1657 static void
1658 gtk_range_size_allocate (GtkWidget     *widget,
1659                          GtkAllocation *allocation)
1660 {
1661   GtkRange *range = GTK_RANGE (widget);
1662   GtkRangePrivate *priv = range->priv;
1663
1664   modify_allocation_for_window_grip (widget, allocation);
1665   gtk_widget_set_allocation (widget, allocation);
1666
1667   priv->recalc_marks = TRUE;
1668
1669   priv->need_recalc = TRUE;
1670   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1671
1672   if (gtk_widget_get_realized (widget))
1673     gdk_window_move_resize (priv->event_window,
1674                             allocation->x, allocation->y,
1675                             allocation->width, allocation->height);
1676 }
1677
1678 static void
1679 resize_grip_visible_changed (GObject    *object,
1680                              GParamSpec *pspec,
1681                              gpointer    user_data)
1682 {
1683   gtk_widget_queue_resize (GTK_WIDGET (user_data));
1684 }
1685
1686 static void
1687 gtk_range_hierarchy_changed (GtkWidget *widget,
1688                              GtkWidget *previous_toplevel)
1689 {
1690   GtkWidget *window;
1691
1692   if (previous_toplevel)
1693     g_signal_handlers_disconnect_by_func (previous_toplevel,
1694                                           G_CALLBACK (resize_grip_visible_changed),
1695                                           widget);
1696   window = gtk_widget_get_toplevel (widget);
1697   if (gtk_widget_is_toplevel (window))
1698     g_signal_connect (window, "notify::resize-grip-visible",
1699                       G_CALLBACK (resize_grip_visible_changed), widget);
1700 }
1701
1702 static void
1703 gtk_range_realize (GtkWidget *widget)
1704 {
1705   GtkAllocation allocation;
1706   GtkRange *range = GTK_RANGE (widget);
1707   GtkRangePrivate *priv = range->priv;
1708   GdkWindow *window;
1709   GdkWindowAttr attributes;
1710   gint attributes_mask;
1711
1712   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
1713
1714   gtk_widget_set_realized (widget, TRUE);
1715
1716   window = gtk_widget_get_parent_window (widget);
1717   gtk_widget_set_window (widget, window);
1718   g_object_ref (window);
1719
1720   gtk_widget_get_allocation (widget, &allocation);
1721   if (modify_allocation_for_window_grip (widget, &allocation))
1722     gtk_widget_set_allocation (widget, &allocation);
1723
1724   attributes.window_type = GDK_WINDOW_CHILD;
1725   attributes.x = allocation.x;
1726   attributes.y = allocation.y;
1727   attributes.width = allocation.width;
1728   attributes.height = allocation.height;
1729   attributes.wclass = GDK_INPUT_ONLY;
1730   attributes.event_mask = gtk_widget_get_events (widget);
1731   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
1732                             GDK_BUTTON_RELEASE_MASK |
1733                             GDK_ENTER_NOTIFY_MASK |
1734                             GDK_LEAVE_NOTIFY_MASK |
1735                             GDK_POINTER_MOTION_MASK |
1736                             GDK_POINTER_MOTION_HINT_MASK);
1737
1738   attributes_mask = GDK_WA_X | GDK_WA_Y;
1739
1740   priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
1741                                         &attributes, attributes_mask);
1742   gdk_window_set_user_data (priv->event_window, range);
1743 }
1744
1745 static void
1746 gtk_range_unrealize (GtkWidget *widget)
1747 {
1748   GtkRange *range = GTK_RANGE (widget);
1749   GtkRangePrivate *priv = range->priv;
1750
1751   gtk_range_remove_step_timer (range);
1752
1753   gdk_window_set_user_data (priv->event_window, NULL);
1754   gdk_window_destroy (priv->event_window);
1755   priv->event_window = NULL;
1756
1757   GTK_WIDGET_CLASS (gtk_range_parent_class)->unrealize (widget);
1758 }
1759
1760 static void
1761 gtk_range_map (GtkWidget *widget)
1762 {
1763   GtkRange *range = GTK_RANGE (widget);
1764   GtkRangePrivate *priv = range->priv;
1765
1766   gdk_window_show (priv->event_window);
1767
1768   GTK_WIDGET_CLASS (gtk_range_parent_class)->map (widget);
1769 }
1770
1771 static void
1772 gtk_range_unmap (GtkWidget *widget)
1773 {
1774   GtkRange *range = GTK_RANGE (widget);
1775   GtkRangePrivate *priv = range->priv;
1776
1777   stop_scrolling (range);
1778
1779   gdk_window_hide (priv->event_window);
1780
1781   GTK_WIDGET_CLASS (gtk_range_parent_class)->unmap (widget);
1782 }
1783
1784 static void
1785 _gtk_range_update_context_for_stepper (GtkRange        *range,
1786                                        GtkStyleContext *context,
1787                                        Stepper          stepper)
1788 {
1789   GtkRangePrivate *priv = range->priv;
1790   GtkJunctionSides sides = 0;
1791   gboolean vertical, is_rtl;
1792
1793   vertical = (priv->orientation == GTK_ORIENTATION_VERTICAL);
1794   is_rtl = (gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
1795
1796   /* Take junction sides from what's been
1797    * previously set to the widget itself
1798    */
1799   sides = gtk_style_context_get_junction_sides (context);
1800
1801   if (vertical)
1802     sides &= ~(GTK_JUNCTION_TOP | GTK_JUNCTION_BOTTOM);
1803   else
1804     sides &= ~(GTK_JUNCTION_LEFT | GTK_JUNCTION_RIGHT);
1805
1806   switch (stepper)
1807     {
1808     case STEPPER_A:
1809       if (vertical)
1810         sides |= GTK_JUNCTION_BOTTOM;
1811       else
1812         sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1813       break;
1814     case STEPPER_B:
1815       if (priv->has_stepper_a)
1816         {
1817           if (vertical)
1818             sides |= GTK_JUNCTION_TOP;
1819           else
1820             sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1821         }
1822
1823       if (vertical)
1824         sides |= GTK_JUNCTION_BOTTOM;
1825       else
1826         sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1827       break;
1828     case STEPPER_C:
1829       if (priv->has_stepper_d)
1830         {
1831           if (vertical)
1832             sides |= GTK_JUNCTION_BOTTOM;
1833           else
1834             sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1835         }
1836
1837       if (vertical)
1838         sides |= GTK_JUNCTION_TOP;
1839       else
1840         sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1841       break;
1842     case STEPPER_D:
1843       if (vertical)
1844         sides |= GTK_JUNCTION_TOP;
1845       else
1846         sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1847       break;
1848     }
1849
1850   gtk_style_context_set_junction_sides (context, sides);
1851 }
1852
1853 static void
1854 draw_stepper (GtkRange     *range,
1855               Stepper       stepper,
1856               cairo_t      *cr,
1857               GtkArrowType  arrow_type,
1858               gboolean      clicked,
1859               gboolean      prelighted,
1860               GtkStateFlags state)
1861 {
1862   GtkRangePrivate *priv = range->priv;
1863   GtkAllocation allocation;
1864   GtkStyleContext *context;
1865   GtkWidget *widget = GTK_WIDGET (range);
1866   gfloat arrow_scaling;
1867   GdkRectangle *rect;
1868   gdouble arrow_x;
1869   gdouble arrow_y;
1870   gdouble arrow_size, angle;
1871   gboolean arrow_sensitive;
1872
1873   switch (stepper)
1874     {
1875     case STEPPER_A:
1876       rect = &priv->stepper_a;
1877       break;
1878     case STEPPER_B:
1879       rect = &priv->stepper_b;
1880       break;
1881     case STEPPER_C:
1882       rect = &priv->stepper_c;
1883       break;
1884     case STEPPER_D:
1885       rect = &priv->stepper_d;
1886       break;
1887     default:
1888       g_assert_not_reached ();
1889     };
1890
1891   arrow_sensitive = TRUE;
1892
1893   gtk_widget_get_allocation (widget, &allocation);
1894
1895   if ((!priv->inverted && (arrow_type == GTK_ARROW_DOWN ||
1896                             arrow_type == GTK_ARROW_RIGHT)) ||
1897       (priv->inverted  && (arrow_type == GTK_ARROW_UP ||
1898                             arrow_type == GTK_ARROW_LEFT)))
1899     {
1900       arrow_sensitive = priv->upper_sensitive;
1901     }
1902   else
1903     {
1904       arrow_sensitive = priv->lower_sensitive;
1905     }
1906
1907   state &= ~(GTK_STATE_FLAG_ACTIVE | GTK_STATE_FLAG_PRELIGHT);
1908
1909   if ((state & GTK_STATE_FLAG_INSENSITIVE) || !arrow_sensitive)
1910     {
1911       state |= GTK_STATE_FLAG_INSENSITIVE;
1912     }
1913   else
1914     {
1915       if (clicked)
1916         state |= GTK_STATE_FLAG_ACTIVE;
1917       if (prelighted)
1918         state |= GTK_STATE_FLAG_PRELIGHT;
1919     }
1920
1921   context = gtk_widget_get_style_context (widget);
1922
1923   gtk_style_context_save (context);
1924
1925   /* don't set juction sides on scrollbar steppers */
1926   if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_SCROLLBAR))
1927     gtk_style_context_set_junction_sides (context, GTK_JUNCTION_NONE);
1928   else
1929     _gtk_range_update_context_for_stepper (range, context, stepper);
1930
1931   gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
1932   gtk_style_context_set_state (context, state);
1933
1934   switch (arrow_type)
1935     {
1936     case GTK_ARROW_RIGHT:
1937       gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
1938       break;
1939     case GTK_ARROW_DOWN:
1940       gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
1941       break;
1942     case GTK_ARROW_LEFT:
1943       gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
1944       break;
1945     case GTK_ARROW_UP:
1946     default:
1947       gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
1948       break;
1949     }
1950
1951   gtk_render_background (context, cr,
1952                          rect->x, rect->y,
1953                          rect->width, rect->height);
1954   gtk_render_frame (context, cr,
1955                     rect->x, rect->y,
1956                     rect->width, rect->height);
1957
1958   gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
1959
1960   arrow_size = MIN (rect->width, rect->height) * arrow_scaling;
1961   arrow_x = rect->x + (rect->width - arrow_size) / 2;
1962   arrow_y = rect->y + (rect->height - arrow_size) / 2;
1963
1964   if (clicked && arrow_sensitive)
1965     {
1966       gint arrow_displacement_x;
1967       gint arrow_displacement_y;
1968
1969       gtk_range_get_props (GTK_RANGE (widget),
1970                            NULL, NULL, NULL, NULL, NULL, NULL,
1971                            &arrow_displacement_x, &arrow_displacement_y);
1972
1973       arrow_x += arrow_displacement_x;
1974       arrow_y += arrow_displacement_y;
1975     }
1976
1977   switch (arrow_type)
1978     {
1979     case GTK_ARROW_RIGHT:
1980       angle = G_PI / 2;
1981       break;
1982     case GTK_ARROW_DOWN:
1983       angle = G_PI;
1984       break;
1985     case GTK_ARROW_LEFT:
1986       angle = 3 * (G_PI / 2);
1987       break;
1988     case GTK_ARROW_UP:
1989     default:
1990       angle = 0;
1991       break;
1992     }
1993
1994   gtk_render_arrow (context, cr,
1995                     angle,
1996                     arrow_x, arrow_y,
1997                     arrow_size);
1998
1999   gtk_style_context_restore (context);
2000 }
2001
2002 static gboolean
2003 gtk_range_draw (GtkWidget *widget,
2004                 cairo_t   *cr)
2005 {
2006   GtkRange *range = GTK_RANGE (widget);
2007   GtkRangePrivate *priv = range->priv;
2008   GtkStateFlags widget_state;
2009   gint focus_line_width = 0;
2010   gint focus_padding = 0;
2011   gboolean touchscreen;
2012   gboolean draw_trough = TRUE;
2013   GtkStyleContext *context;
2014
2015   context = gtk_widget_get_style_context (widget);
2016   g_object_get (gtk_widget_get_settings (widget),
2017                 "gtk-touchscreen-mode", &touchscreen,
2018                 NULL);
2019
2020   if (GTK_IS_SCALE (widget) &&
2021       gtk_adjustment_get_upper (priv->adjustment) == gtk_adjustment_get_lower (priv->adjustment))
2022     draw_trough = FALSE;
2023
2024   if (gtk_widget_get_can_focus (GTK_WIDGET (range)))
2025     gtk_widget_style_get (GTK_WIDGET (range),
2026                           "focus-line-width", &focus_line_width,
2027                           "focus-padding", &focus_padding,
2028                           NULL);
2029
2030   /* we're now exposing, so there's no need to force early repaints */
2031   if (priv->repaint_id)
2032     g_source_remove (priv->repaint_id);
2033   priv->repaint_id = 0;
2034
2035   gtk_range_calc_marks (range);
2036   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
2037
2038   widget_state = gtk_widget_get_state_flags (widget);
2039
2040   /* Just to be confusing, we draw the trough for the whole
2041    * range rectangle, not the trough rectangle (the trough
2042    * rectangle is just for hit detection)
2043    */
2044   cairo_save (cr);
2045   gdk_cairo_rectangle (cr, &priv->range_rect);
2046   cairo_clip (cr);
2047
2048     {
2049       gint     x      = (priv->range_rect.x +
2050                          focus_line_width + focus_padding);
2051       gint     y      = (priv->range_rect.y +
2052                          focus_line_width + focus_padding);
2053       gint     width  = (priv->range_rect.width -
2054                          2 * (focus_line_width + focus_padding));
2055       gint     height = (priv->range_rect.height -
2056                          2 * (focus_line_width + focus_padding));
2057       gboolean trough_under_steppers;
2058       gint     stepper_size;
2059       gint     stepper_spacing;
2060
2061       gtk_widget_style_get (GTK_WIDGET (range),
2062                             "trough-under-steppers", &trough_under_steppers,
2063                             "stepper-size",          &stepper_size,
2064                             "stepper-spacing",       &stepper_spacing,
2065                             NULL);
2066
2067       if (!trough_under_steppers)
2068         {
2069           gint offset  = 0;
2070           gint shorter = 0;
2071
2072           if (priv->has_stepper_a)
2073             offset += stepper_size;
2074
2075           if (priv->has_stepper_b)
2076             offset += stepper_size;
2077
2078           shorter += offset;
2079
2080           if (priv->has_stepper_c)
2081             shorter += stepper_size;
2082
2083           if (priv->has_stepper_d)
2084             shorter += stepper_size;
2085
2086           if (priv->has_stepper_a || priv->has_stepper_b)
2087             {
2088               offset  += stepper_spacing;
2089               shorter += stepper_spacing;
2090             }
2091
2092           if (priv->has_stepper_c || priv->has_stepper_d)
2093             {
2094               shorter += stepper_spacing;
2095             }
2096
2097           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2098             {
2099               x     += offset;
2100               width -= shorter;
2101             }
2102           else
2103             {
2104               y      += offset;
2105               height -= shorter;
2106             }
2107         }
2108
2109       gtk_style_context_save (context);
2110       gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
2111
2112       if (draw_trough)
2113         {
2114           if (!priv->has_origin)
2115             {
2116               gtk_render_background (context, cr,
2117                                      x, y, width, height);
2118
2119               gtk_render_frame (context, cr,
2120                                 x, y, width, height);
2121             }
2122           else
2123             {
2124               gboolean is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
2125
2126               gint trough_change_pos_x = width;
2127               gint trough_change_pos_y = height;
2128
2129               if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2130                 trough_change_pos_x = (priv->slider.x +
2131                                        priv->slider.width / 2 -
2132                                        x);
2133               else
2134                 trough_change_pos_y = (priv->slider.y +
2135                                        priv->slider.height / 2 -
2136                                        y);
2137
2138               gtk_style_context_save (context);
2139               if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2140                 {
2141                   gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
2142
2143                   if (!is_rtl)
2144                     gtk_style_context_add_class (context, GTK_STYLE_CLASS_HIGHLIGHT);
2145                 }
2146               else
2147                 gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
2148
2149               gtk_render_background (context, cr, x, y,
2150                                      trough_change_pos_x,
2151                                      trough_change_pos_y);
2152
2153               gtk_render_frame (context, cr, x, y,
2154                                 trough_change_pos_x,
2155                                 trough_change_pos_y);
2156
2157               gtk_style_context_restore (context);
2158
2159               if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2160                 trough_change_pos_y = 0;
2161               else
2162                 trough_change_pos_x = 0;
2163
2164               gtk_style_context_save (context);
2165               if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2166                 {
2167                   gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
2168
2169                   if (is_rtl)
2170                     gtk_style_context_add_class (context, GTK_STYLE_CLASS_HIGHLIGHT);
2171                 }
2172               else
2173                 {
2174                   gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
2175                   gtk_style_context_add_class (context, GTK_STYLE_CLASS_HIGHLIGHT);
2176                 }
2177
2178               gtk_render_background (context, cr,
2179                                      x + trough_change_pos_x, y + trough_change_pos_y,
2180                                      width - trough_change_pos_x,
2181                                      height - trough_change_pos_y);
2182
2183               gtk_render_frame (context, cr,
2184                                 x + trough_change_pos_x, y + trough_change_pos_y,
2185                                 width - trough_change_pos_x,
2186                                 height - trough_change_pos_y);
2187
2188               gtk_style_context_restore (context);
2189             }
2190         }
2191       else
2192         {
2193           gtk_render_background (context, cr,
2194                                  x, y, width, height);
2195           gtk_render_frame (context, cr,
2196                             x, y, width, height);
2197         }
2198
2199       gtk_style_context_restore (context);
2200
2201       if (priv->show_fill_level &&
2202           gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) -
2203           gtk_adjustment_get_lower (priv->adjustment) != 0)
2204         {
2205           gdouble  fill_level  = priv->fill_level;
2206           gint     fill_x      = x;
2207           gint     fill_y      = y;
2208           gint     fill_width  = width;
2209           gint     fill_height = height;
2210
2211           gtk_style_context_save (context);
2212           gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
2213
2214           fill_level = CLAMP (fill_level, gtk_adjustment_get_lower (priv->adjustment),
2215                               gtk_adjustment_get_upper (priv->adjustment) -
2216                               gtk_adjustment_get_page_size (priv->adjustment));
2217
2218           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2219             {
2220               fill_x     = priv->trough.x;
2221               fill_width = (priv->slider.width +
2222                             (fill_level - gtk_adjustment_get_lower (priv->adjustment)) /
2223                             (gtk_adjustment_get_upper (priv->adjustment) -
2224                              gtk_adjustment_get_lower (priv->adjustment) -
2225                              gtk_adjustment_get_page_size (priv->adjustment)) *
2226                             (priv->trough.width -
2227                              priv->slider.width));
2228
2229               if (should_invert (range))
2230                 fill_x += priv->trough.width - fill_width;
2231             }
2232           else
2233             {
2234               fill_y      = priv->trough.y;
2235               fill_height = (priv->slider.height +
2236                              (fill_level - gtk_adjustment_get_lower (priv->adjustment)) /
2237                              (gtk_adjustment_get_upper (priv->adjustment) -
2238                               gtk_adjustment_get_lower (priv->adjustment) -
2239                               gtk_adjustment_get_page_size (priv->adjustment)) *
2240                              (priv->trough.height -
2241                               priv->slider.height));
2242
2243               if (should_invert (range))
2244                 fill_y += priv->trough.height - fill_height;
2245             }
2246
2247 #if 0
2248           if (fill_level < gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment))
2249             fill_detail = "trough-fill-level-full";
2250           else
2251             fill_detail = "trough-fill-level";
2252 #endif
2253
2254           gtk_render_activity (context, cr,
2255                                fill_x, fill_y,
2256                                fill_width, fill_height);
2257
2258           gtk_style_context_restore (context);
2259         }
2260
2261       if (!(widget_state & GTK_STATE_FLAG_INSENSITIVE) && gtk_widget_has_visible_focus (widget))
2262         {
2263           gtk_render_focus (context, cr,
2264                             priv->range_rect.x,
2265                             priv->range_rect.y,
2266                             priv->range_rect.width,
2267                             priv->range_rect.height);
2268         }
2269     }
2270
2271   cairo_restore (cr);
2272
2273   if (draw_trough)
2274     {
2275       GtkStateFlags state = widget_state;
2276
2277       state &= ~(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE);
2278
2279       if (!touchscreen && priv->mouse_location == MOUSE_SLIDER && !(state & GTK_STATE_FLAG_INSENSITIVE))
2280         state |= GTK_STATE_FLAG_PRELIGHT;
2281
2282       if (priv->grab_location == MOUSE_SLIDER)
2283         state |= GTK_STATE_FLAG_ACTIVE;
2284
2285       cairo_save (cr);
2286       gdk_cairo_rectangle (cr, &priv->slider);
2287       cairo_clip (cr);
2288
2289       gtk_style_context_save (context);
2290       gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
2291       gtk_style_context_set_state (context, state);
2292
2293       gtk_render_slider (context, cr,
2294                          priv->slider.x,
2295                          priv->slider.y,
2296                          priv->slider.width,
2297                          priv->slider.height,
2298                          priv->orientation);
2299
2300       gtk_style_context_restore (context);
2301
2302       cairo_restore (cr);
2303     }
2304
2305   if (priv->has_stepper_a)
2306     draw_stepper (range, STEPPER_A, cr,
2307                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
2308                   priv->grab_location == MOUSE_STEPPER_A,
2309                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_A,
2310                   widget_state);
2311
2312   if (priv->has_stepper_b)
2313     draw_stepper (range, STEPPER_B, cr,
2314                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
2315                   priv->grab_location == MOUSE_STEPPER_B,
2316                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_B,
2317                   widget_state);
2318
2319   if (priv->has_stepper_c)
2320     draw_stepper (range, STEPPER_C, cr,
2321                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
2322                   priv->grab_location == MOUSE_STEPPER_C,
2323                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_C,
2324                   widget_state);
2325
2326   if (priv->has_stepper_d)
2327     draw_stepper (range, STEPPER_D, cr,
2328                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
2329                   priv->grab_location == MOUSE_STEPPER_D,
2330                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_D,
2331                   widget_state);
2332
2333   return FALSE;
2334 }
2335
2336 static void
2337 range_grab_add (GtkRange      *range,
2338                 GdkDevice     *device,
2339                 MouseLocation  location,
2340                 gint           button)
2341 {
2342   GtkRangePrivate *priv = range->priv;
2343
2344   if (device == priv->grab_device)
2345     return;
2346
2347   if (priv->grab_device != NULL)
2348     {
2349       g_warning ("GtkRange already had a grab device, releasing device grab");
2350       gtk_device_grab_remove (GTK_WIDGET (range), priv->grab_device);
2351     }
2352
2353   /* we don't actually gdk_grab, since a button is down */
2354   gtk_device_grab_add (GTK_WIDGET (range), device, TRUE);
2355
2356   priv->grab_location = location;
2357   priv->grab_button = button;
2358   priv->grab_device = device;
2359
2360   if (gtk_range_update_mouse_location (range))
2361     gtk_widget_queue_draw (GTK_WIDGET (range));
2362 }
2363
2364 static void
2365 range_grab_remove (GtkRange *range)
2366 {
2367   GtkRangePrivate *priv = range->priv;
2368   MouseLocation location;
2369
2370   if (priv->grab_device)
2371     {
2372       gtk_device_grab_remove (GTK_WIDGET (range),
2373                               priv->grab_device);
2374       priv->grab_device = NULL;
2375     }
2376
2377   location = priv->grab_location;
2378   priv->grab_location = MOUSE_OUTSIDE;
2379   priv->grab_button = 0;
2380
2381   if (gtk_range_update_mouse_location (range) ||
2382       location != MOUSE_OUTSIDE)
2383     gtk_widget_queue_draw (GTK_WIDGET (range));
2384 }
2385
2386 static GtkScrollType
2387 range_get_scroll_for_grab (GtkRange      *range)
2388 {
2389   GtkRangePrivate *priv = range->priv;
2390   gboolean invert;
2391
2392   invert = should_invert (range);
2393   switch (priv->grab_location)
2394     {
2395       /* Backward stepper */
2396     case MOUSE_STEPPER_A:
2397     case MOUSE_STEPPER_C:
2398       switch (priv->grab_button)
2399         {
2400         case GDK_BUTTON_PRIMARY:
2401           return invert ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
2402           break;
2403         case GDK_BUTTON_MIDDLE:
2404           return invert ? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_PAGE_BACKWARD;
2405           break;
2406         case GDK_BUTTON_SECONDARY:
2407           return invert ? GTK_SCROLL_END : GTK_SCROLL_START;
2408           break;
2409         }
2410       break;
2411
2412       /* Forward stepper */
2413     case MOUSE_STEPPER_B:
2414     case MOUSE_STEPPER_D:
2415       switch (priv->grab_button)
2416         {
2417         case GDK_BUTTON_PRIMARY:
2418           return invert ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
2419           break;
2420         case GDK_BUTTON_MIDDLE:
2421           return invert ? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_PAGE_FORWARD;
2422           break;
2423         case GDK_BUTTON_SECONDARY:
2424           return invert ? GTK_SCROLL_START : GTK_SCROLL_END;
2425           break;
2426        }
2427       break;
2428
2429       /* In the trough */
2430     case MOUSE_TROUGH:
2431       {
2432         if (priv->trough_click_forward)
2433           return GTK_SCROLL_PAGE_FORWARD;
2434         else
2435           return GTK_SCROLL_PAGE_BACKWARD;
2436       }
2437       break;
2438
2439     case MOUSE_OUTSIDE:
2440     case MOUSE_SLIDER:
2441     case MOUSE_WIDGET:
2442       break;
2443     }
2444
2445   return GTK_SCROLL_NONE;
2446 }
2447
2448 static gdouble
2449 coord_to_value (GtkRange *range,
2450                 gint      coord)
2451 {
2452   GtkRangePrivate *priv = range->priv;
2453   gdouble frac;
2454   gdouble value;
2455   gint    trough_length;
2456   gint    trough_start;
2457   gint    slider_length;
2458   gint    trough_border;
2459   gint    trough_under_steppers;
2460
2461   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2462     {
2463       trough_length = priv->trough.height;
2464       trough_start  = priv->trough.y;
2465       slider_length = priv->slider.height;
2466     }
2467   else
2468     {
2469       trough_length = priv->trough.width;
2470       trough_start  = priv->trough.x;
2471       slider_length = priv->slider.width;
2472     }
2473
2474   gtk_range_get_props (range, NULL, NULL, NULL, &trough_border, NULL,
2475                        &trough_under_steppers, NULL, NULL);
2476
2477   if (! trough_under_steppers)
2478     {
2479       trough_start += trough_border;
2480       trough_length -= 2 * trough_border;
2481     }
2482
2483   if (trough_length == slider_length)
2484     frac = 1.0;
2485   else
2486     frac = (MAX (0, coord - trough_start) /
2487             (gdouble) (trough_length - slider_length));
2488
2489   if (should_invert (range))
2490     frac = 1.0 - frac;
2491
2492   value = gtk_adjustment_get_lower (priv->adjustment) + frac * (gtk_adjustment_get_upper (priv->adjustment) -
2493                                             gtk_adjustment_get_lower (priv->adjustment) -
2494                                             gtk_adjustment_get_page_size (priv->adjustment));
2495
2496   return value;
2497 }
2498
2499 static gboolean
2500 gtk_range_key_press (GtkWidget   *widget,
2501                      GdkEventKey *event)
2502 {
2503   GdkDevice *device;
2504   GtkRange *range = GTK_RANGE (widget);
2505   GtkRangePrivate *priv = range->priv;
2506
2507   device = gdk_event_get_device ((GdkEvent *) event);
2508   device = gdk_device_get_associated_device (device);
2509
2510   if (device == priv->grab_device &&
2511       event->keyval == GDK_KEY_Escape &&
2512       priv->grab_location != MOUSE_OUTSIDE)
2513     {
2514       stop_scrolling (range);
2515
2516       update_slider_position (range,
2517                               priv->slide_initial_coordinate,
2518                               priv->slide_initial_coordinate);
2519
2520       return TRUE;
2521     }
2522
2523   return GTK_WIDGET_CLASS (gtk_range_parent_class)->key_press_event (widget, event);
2524 }
2525
2526 static gint
2527 gtk_range_button_press (GtkWidget      *widget,
2528                         GdkEventButton *event)
2529 {
2530   GtkRange *range = GTK_RANGE (widget);
2531   GtkRangePrivate *priv = range->priv;
2532   GdkDevice *device;
2533
2534   if (!gtk_widget_has_focus (widget))
2535     gtk_widget_grab_focus (widget);
2536
2537   /* ignore presses when we're already doing something else. */
2538   if (priv->grab_location != MOUSE_OUTSIDE)
2539     return FALSE;
2540
2541   device = gdk_event_get_device ((GdkEvent *) event);
2542   priv->mouse_x = event->x;
2543   priv->mouse_y = event->y;
2544
2545   if (gtk_range_update_mouse_location (range))
2546     gtk_widget_queue_draw (widget);
2547
2548   if (priv->mouse_location == MOUSE_TROUGH  &&
2549       event->button == GDK_BUTTON_PRIMARY)
2550     {
2551       /* button 1 steps by page increment, as with button 2 on a stepper
2552        */
2553       GtkScrollType scroll;
2554       gdouble click_value;
2555
2556       click_value = coord_to_value (range,
2557                                     priv->orientation == GTK_ORIENTATION_VERTICAL ?
2558                                     event->y : event->x);
2559
2560       priv->trough_click_forward = click_value > gtk_adjustment_get_value (priv->adjustment);
2561       range_grab_add (range, device, MOUSE_TROUGH, event->button);
2562
2563       scroll = range_get_scroll_for_grab (range);
2564
2565       gtk_range_add_step_timer (range, scroll);
2566
2567       return TRUE;
2568     }
2569   else if ((priv->mouse_location == MOUSE_STEPPER_A ||
2570             priv->mouse_location == MOUSE_STEPPER_B ||
2571             priv->mouse_location == MOUSE_STEPPER_C ||
2572             priv->mouse_location == MOUSE_STEPPER_D) &&
2573            (event->button == GDK_BUTTON_PRIMARY ||
2574             event->button == GDK_BUTTON_MIDDLE ||
2575             event->button == GDK_BUTTON_SECONDARY))
2576     {
2577       GtkAllocation allocation;
2578       GdkRectangle *stepper_area;
2579       GtkScrollType scroll;
2580
2581       range_grab_add (range, device, priv->mouse_location, event->button);
2582
2583       gtk_widget_get_allocation (widget, &allocation);
2584       stepper_area = get_area (range, priv->mouse_location);
2585
2586       gtk_widget_queue_draw_area (widget,
2587                                   allocation.x + stepper_area->x,
2588                                   allocation.y + stepper_area->y,
2589                                   stepper_area->width,
2590                                   stepper_area->height);
2591
2592       scroll = range_get_scroll_for_grab (range);
2593       if (scroll != GTK_SCROLL_NONE)
2594         gtk_range_add_step_timer (range, scroll);
2595
2596       return TRUE;
2597     }
2598   else if ((priv->mouse_location == MOUSE_TROUGH &&
2599             event->button == GDK_BUTTON_MIDDLE) ||
2600            priv->mouse_location == MOUSE_SLIDER)
2601     {
2602       gboolean need_value_update = FALSE;
2603
2604       /* Any button can be used to drag the slider, but you can start
2605        * dragging the slider with a trough click using button 2;
2606        * On button 2 press, we warp the slider to mouse position,
2607        * then begin the slider drag.
2608        */
2609       if (event->button == GDK_BUTTON_MIDDLE)
2610         {
2611           gdouble slider_low_value, slider_high_value, new_value;
2612
2613           slider_high_value =
2614             coord_to_value (range,
2615                             priv->orientation == GTK_ORIENTATION_VERTICAL ?
2616                             event->y : event->x);
2617           slider_low_value =
2618             coord_to_value (range,
2619                             priv->orientation == GTK_ORIENTATION_VERTICAL ?
2620                             event->y - priv->slider.height :
2621                             event->x - priv->slider.width);
2622
2623           /* compute new value for warped slider */
2624           new_value = slider_low_value + (slider_high_value - slider_low_value) / 2;
2625
2626           /* recalc slider, so we can set slide_initial_slider_position
2627            * properly
2628            */
2629           priv->need_recalc = TRUE;
2630           gtk_range_calc_layout (range, new_value);
2631
2632           /* defer adjustment updates to update_slider_position() in order
2633            * to keep pixel quantisation
2634            */
2635           need_value_update = TRUE;
2636         }
2637
2638       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2639         {
2640           priv->slide_initial_slider_position = priv->slider.y;
2641           priv->slide_initial_coordinate = event->y;
2642         }
2643       else
2644         {
2645           priv->slide_initial_slider_position = priv->slider.x;
2646           priv->slide_initial_coordinate = event->x;
2647         }
2648
2649       range_grab_add (range, device, MOUSE_SLIDER, event->button);
2650
2651       gtk_widget_queue_draw (widget);
2652
2653       if (need_value_update)
2654         update_slider_position (range, event->x, event->y);
2655
2656       return TRUE;
2657     }
2658
2659   return FALSE;
2660 }
2661
2662 /* During a slide, move the slider as required given new mouse position */
2663 static void
2664 update_slider_position (GtkRange *range,
2665                         gint      mouse_x,
2666                         gint      mouse_y)
2667 {
2668   GtkRangePrivate *priv = range->priv;
2669   gint delta;
2670   gint c;
2671   gdouble new_value;
2672   gboolean handled;
2673   gdouble next_value;
2674   gdouble mark_value;
2675   gdouble mark_delta;
2676   gint i;
2677
2678   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2679     delta = mouse_y - priv->slide_initial_coordinate;
2680   else
2681     delta = mouse_x - priv->slide_initial_coordinate;
2682
2683   c = priv->slide_initial_slider_position + delta;
2684
2685   new_value = coord_to_value (range, c);
2686   next_value = coord_to_value (range, c + 1);
2687   mark_delta = fabs (next_value - new_value);
2688
2689   for (i = 0; i < priv->n_marks; i++)
2690     {
2691       mark_value = priv->marks[i];
2692
2693       if (fabs (gtk_adjustment_get_value (priv->adjustment) - mark_value) < 3 * mark_delta)
2694         {
2695           if (fabs (new_value - mark_value) < (priv->slider_end - priv->slider_start) * 0.5 * mark_delta)
2696             {
2697               new_value = mark_value;
2698               break;
2699             }
2700         }
2701     }
2702
2703   g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value,
2704                  &handled);
2705 }
2706
2707 static void
2708 stop_scrolling (GtkRange *range)
2709 {
2710   range_grab_remove (range);
2711   gtk_range_remove_step_timer (range);
2712 }
2713
2714 static gboolean
2715 gtk_range_grab_broken (GtkWidget          *widget,
2716                        GdkEventGrabBroken *event)
2717 {
2718   GtkRange *range = GTK_RANGE (widget);
2719   GtkRangePrivate *priv = range->priv;
2720   GdkDevice *device;
2721
2722   device = gdk_event_get_device ((GdkEvent *) event);
2723
2724   if (device == priv->grab_device &&
2725       priv->grab_location != MOUSE_OUTSIDE)
2726     {
2727       if (priv->grab_location == MOUSE_SLIDER)
2728         update_slider_position (range, priv->mouse_x, priv->mouse_y);
2729
2730       stop_scrolling (range);
2731
2732       return TRUE;
2733     }
2734
2735   return FALSE;
2736 }
2737
2738 static gint
2739 gtk_range_button_release (GtkWidget      *widget,
2740                           GdkEventButton *event)
2741 {
2742   GtkRange *range = GTK_RANGE (widget);
2743   GtkRangePrivate *priv = range->priv;
2744   GdkDevice *device;
2745
2746   if (event->window == priv->event_window)
2747     {
2748       priv->mouse_x = event->x;
2749       priv->mouse_y = event->y;
2750     }
2751   else
2752     {
2753       gdk_window_get_device_position (priv->event_window,
2754                                       event->device,
2755                                       &priv->mouse_x,
2756                                       &priv->mouse_y,
2757                                       NULL);
2758     }
2759
2760   device = gdk_event_get_device ((GdkEvent *) event);
2761
2762   if (priv->grab_device == device &&
2763       priv->grab_button == event->button)
2764     {
2765       if (priv->grab_location == MOUSE_SLIDER)
2766         update_slider_position (range, priv->mouse_x, priv->mouse_y);
2767
2768       stop_scrolling (range);
2769
2770       return TRUE;
2771     }
2772
2773   return FALSE;
2774 }
2775
2776 /**
2777  * _gtk_range_get_wheel_delta:
2778  * @range: a #GtkRange
2779  * @direction: A #GdkScrollDirection
2780  *
2781  * Returns a good step value for the mouse wheel.
2782  *
2783  * Return value: A good step value for the mouse wheel.
2784  *
2785  * Since: 2.4
2786  **/
2787 gdouble
2788 _gtk_range_get_wheel_delta (GtkRange           *range,
2789                             GdkScrollDirection  direction)
2790 {
2791   GtkRangePrivate *priv = range->priv;
2792   GtkAdjustment *adjustment = priv->adjustment;
2793   gdouble delta;
2794
2795   if (GTK_IS_SCROLLBAR (range))
2796     delta = pow (gtk_adjustment_get_page_size (adjustment), 2.0 / 3.0);
2797   else
2798     delta = gtk_adjustment_get_step_increment (adjustment) * 2;
2799
2800   if (direction == GDK_SCROLL_UP ||
2801       direction == GDK_SCROLL_LEFT)
2802     delta = - delta;
2803
2804   if (priv->inverted)
2805     delta = - delta;
2806
2807   return delta;
2808 }
2809
2810 static gboolean
2811 gtk_range_scroll_event (GtkWidget      *widget,
2812                         GdkEventScroll *event)
2813 {
2814   GtkRange *range = GTK_RANGE (widget);
2815   GtkRangePrivate *priv = range->priv;
2816
2817   if (gtk_widget_get_realized (widget))
2818     {
2819       gdouble delta;
2820       gboolean handled;
2821
2822       delta = _gtk_range_get_wheel_delta (range, event->direction);
2823
2824       g_signal_emit (range, signals[CHANGE_VALUE], 0,
2825                      GTK_SCROLL_JUMP, gtk_adjustment_get_value (priv->adjustment) + delta,
2826                      &handled);
2827     }
2828
2829   return TRUE;
2830 }
2831
2832 static gboolean
2833 gtk_range_motion_notify (GtkWidget      *widget,
2834                          GdkEventMotion *event)
2835 {
2836   GtkRange *range = GTK_RANGE (widget);
2837   GtkRangePrivate *priv = range->priv;
2838
2839   gdk_event_request_motions (event);
2840
2841   priv->mouse_x = event->x;
2842   priv->mouse_y = event->y;
2843
2844   if (gtk_range_update_mouse_location (range))
2845     gtk_widget_queue_draw (widget);
2846
2847   if (priv->grab_location == MOUSE_SLIDER)
2848     update_slider_position (range, event->x, event->y);
2849
2850   /* We handled the event if the mouse was in the range_rect */
2851   return priv->mouse_location != MOUSE_OUTSIDE;
2852 }
2853
2854 static gboolean
2855 gtk_range_enter_notify (GtkWidget        *widget,
2856                         GdkEventCrossing *event)
2857 {
2858   GtkRange *range = GTK_RANGE (widget);
2859   GtkRangePrivate *priv = range->priv;
2860
2861   priv->mouse_x = event->x;
2862   priv->mouse_y = event->y;
2863
2864   if (gtk_range_update_mouse_location (range))
2865     gtk_widget_queue_draw (widget);
2866
2867   return TRUE;
2868 }
2869
2870 static gboolean
2871 gtk_range_leave_notify (GtkWidget        *widget,
2872                         GdkEventCrossing *event)
2873 {
2874   GtkRange *range = GTK_RANGE (widget);
2875   GtkRangePrivate *priv = range->priv;
2876
2877   priv->mouse_x = -1;
2878   priv->mouse_y = -1;
2879
2880   if (gtk_range_update_mouse_location (range))
2881     gtk_widget_queue_draw (widget);
2882
2883   return TRUE;
2884 }
2885
2886 static void
2887 gtk_range_grab_notify (GtkWidget *widget,
2888                        gboolean   was_grabbed)
2889 {
2890   GtkRangePrivate *priv = GTK_RANGE (widget)->priv;
2891
2892   if (priv->grab_device &&
2893       gtk_widget_device_is_shadowed (widget, priv->grab_device))
2894     stop_scrolling (GTK_RANGE (widget));
2895 }
2896
2897 static void
2898 gtk_range_state_flags_changed (GtkWidget     *widget,
2899                                GtkStateFlags  previous_state)
2900 {
2901   if (!gtk_widget_is_sensitive (widget))
2902     stop_scrolling (GTK_RANGE (widget));
2903 }
2904
2905 #define check_rectangle(rectangle1, rectangle2)              \
2906   {                                                          \
2907     if (rectangle1.x != rectangle2.x) return TRUE;           \
2908     if (rectangle1.y != rectangle2.y) return TRUE;           \
2909     if (rectangle1.width  != rectangle2.width)  return TRUE; \
2910     if (rectangle1.height != rectangle2.height) return TRUE; \
2911   }
2912
2913 static gboolean
2914 layout_changed (GtkRangePrivate *priv1,
2915                 GtkRangePrivate *priv2)
2916 {
2917   check_rectangle (priv1->slider, priv2->slider);
2918   check_rectangle (priv1->trough, priv2->trough);
2919   check_rectangle (priv1->stepper_a, priv2->stepper_a);
2920   check_rectangle (priv1->stepper_d, priv2->stepper_d);
2921   check_rectangle (priv1->stepper_b, priv2->stepper_b);
2922   check_rectangle (priv1->stepper_c, priv2->stepper_c);
2923
2924   if (priv1->upper_sensitive != priv2->upper_sensitive) return TRUE;
2925   if (priv1->lower_sensitive != priv2->lower_sensitive) return TRUE;
2926
2927   return FALSE;
2928 }
2929
2930 static void
2931 gtk_range_adjustment_changed (GtkAdjustment *adjustment,
2932                               gpointer       data)
2933 {
2934   GtkRange *range = GTK_RANGE (data);
2935   GtkRangePrivate *priv = range->priv;
2936   GtkRangePrivate priv_aux = *priv;
2937
2938   priv->recalc_marks = TRUE;
2939   priv->need_recalc = TRUE;
2940   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
2941
2942   /* now check whether the layout changed  */
2943   if (layout_changed (priv, &priv_aux))
2944     gtk_widget_queue_draw (GTK_WIDGET (range));
2945
2946   /* Note that we don't round off to priv->round_digits here.
2947    * that's because it's really broken to change a value
2948    * in response to a change signal on that value; round_digits
2949    * is therefore defined to be a filter on what the GtkRange
2950    * can input into the adjustment, not a filter that the GtkRange
2951    * will enforce on the adjustment.
2952    */
2953 }
2954
2955 static gboolean
2956 force_repaint (gpointer data)
2957 {
2958   GtkRange *range = GTK_RANGE (data);
2959   GtkRangePrivate *priv = range->priv;
2960   GtkWidget *widget = GTK_WIDGET (range);
2961
2962   priv->repaint_id = 0;
2963   if (gtk_widget_is_drawable (widget))
2964     gdk_window_process_updates (gtk_widget_get_window (widget), FALSE);
2965
2966   return FALSE;
2967 }
2968
2969 static void
2970 gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
2971                                     gpointer       data)
2972 {
2973   GtkRange *range = GTK_RANGE (data);
2974   GtkRangePrivate *priv = range->priv;
2975   GtkRangePrivate priv_aux = *priv;
2976
2977   priv->need_recalc = TRUE;
2978   gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
2979
2980   /* now check whether the layout changed  */
2981   if (layout_changed (priv, &priv_aux) ||
2982       (GTK_IS_SCALE (range) && gtk_scale_get_draw_value (GTK_SCALE (range))))
2983     {
2984       gtk_widget_queue_draw (GTK_WIDGET (range));
2985       /* setup a timer to ensure the range isn't lagging too much behind the scroll position */
2986       if (!priv->repaint_id)
2987         priv->repaint_id = gdk_threads_add_timeout_full (GDK_PRIORITY_EVENTS,
2988                                                          181, force_repaint,
2989                                                          range, NULL);
2990     }
2991
2992   /* Note that we don't round off to priv->round_digits here.
2993    * that's because it's really broken to change a value
2994    * in response to a change signal on that value; round_digits
2995    * is therefore defined to be a filter on what the GtkRange
2996    * can input into the adjustment, not a filter that the GtkRange
2997    * will enforce on the adjustment.
2998    */
2999
3000   g_signal_emit (range, signals[VALUE_CHANGED], 0);
3001 }
3002
3003 static void
3004 gtk_range_style_updated (GtkWidget *widget)
3005 {
3006   GtkRange *range = GTK_RANGE (widget);
3007   GtkRangePrivate *priv = range->priv;
3008
3009   priv->need_recalc = TRUE;
3010
3011   GTK_WIDGET_CLASS (gtk_range_parent_class)->style_updated (widget);
3012 }
3013
3014 static void
3015 apply_marks (GtkRange *range,
3016              gdouble   oldval,
3017              gdouble  *newval)
3018 {
3019   GtkRangePrivate *priv = range->priv;
3020   gint i;
3021   gdouble mark;
3022
3023   for (i = 0; i < priv->n_marks; i++)
3024     {
3025       mark = priv->marks[i];
3026       if ((oldval < mark && mark < *newval) ||
3027           (oldval > mark && mark > *newval))
3028         {
3029           *newval = mark;
3030           return;
3031         }
3032     }
3033 }
3034
3035 static void
3036 step_back (GtkRange *range)
3037 {
3038   GtkRangePrivate *priv = range->priv;
3039   gdouble newval;
3040   gboolean handled;
3041
3042   newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_step_increment (priv->adjustment);
3043   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
3044   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3045                  GTK_SCROLL_STEP_BACKWARD, newval, &handled);
3046 }
3047
3048 static void
3049 step_forward (GtkRange *range)
3050 {
3051   GtkRangePrivate *priv = range->priv;
3052   gdouble newval;
3053   gboolean handled;
3054
3055   newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_step_increment (priv->adjustment);
3056   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
3057   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3058                  GTK_SCROLL_STEP_FORWARD, newval, &handled);
3059 }
3060
3061
3062 static void
3063 page_back (GtkRange *range)
3064 {
3065   GtkRangePrivate *priv = range->priv;
3066   gdouble newval;
3067   gboolean handled;
3068
3069   newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_page_increment (priv->adjustment);
3070   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
3071   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3072                  GTK_SCROLL_PAGE_BACKWARD, newval, &handled);
3073 }
3074
3075 static void
3076 page_forward (GtkRange *range)
3077 {
3078   GtkRangePrivate *priv = range->priv;
3079   gdouble newval;
3080   gboolean handled;
3081
3082   newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_page_increment (priv->adjustment);
3083   apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
3084   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3085                  GTK_SCROLL_PAGE_FORWARD, newval, &handled);
3086 }
3087
3088 static void
3089 scroll_begin (GtkRange *range)
3090 {
3091   GtkRangePrivate *priv = range->priv;
3092   gboolean handled;
3093
3094   g_signal_emit (range, signals[CHANGE_VALUE], 0,
3095                  GTK_SCROLL_START, gtk_adjustment_get_lower (priv->adjustment),
3096                  &handled);
3097 }
3098
3099 static void
3100 scroll_end (GtkRange *range)
3101 {
3102   GtkRangePrivate *priv = range->priv;
3103   gdouble newval;
3104   gboolean handled;
3105
3106   newval = gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment);
3107   g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval,
3108                  &handled);
3109 }
3110
3111 static gboolean
3112 gtk_range_scroll (GtkRange     *range,
3113                   GtkScrollType scroll)
3114 {
3115   GtkRangePrivate *priv = range->priv;
3116   gdouble old_value = gtk_adjustment_get_value (priv->adjustment);
3117
3118   switch (scroll)
3119     {
3120     case GTK_SCROLL_STEP_LEFT:
3121       if (should_invert (range))
3122         step_forward (range);
3123       else
3124         step_back (range);
3125       break;
3126
3127     case GTK_SCROLL_STEP_UP:
3128       if (should_invert (range))
3129         step_forward (range);
3130       else
3131         step_back (range);
3132       break;
3133
3134     case GTK_SCROLL_STEP_RIGHT:
3135       if (should_invert (range))
3136         step_back (range);
3137       else
3138         step_forward (range);
3139       break;
3140
3141     case GTK_SCROLL_STEP_DOWN:
3142       if (should_invert (range))
3143         step_back (range);
3144       else
3145         step_forward (range);
3146       break;
3147
3148     case GTK_SCROLL_STEP_BACKWARD:
3149       step_back (range);
3150       break;
3151
3152     case GTK_SCROLL_STEP_FORWARD:
3153       step_forward (range);
3154       break;
3155
3156     case GTK_SCROLL_PAGE_LEFT:
3157       if (should_invert (range))
3158         page_forward (range);
3159       else
3160         page_back (range);
3161       break;
3162
3163     case GTK_SCROLL_PAGE_UP:
3164       if (should_invert (range))
3165         page_forward (range);
3166       else
3167         page_back (range);
3168       break;
3169
3170     case GTK_SCROLL_PAGE_RIGHT:
3171       if (should_invert (range))
3172         page_back (range);
3173       else
3174         page_forward (range);
3175       break;
3176
3177     case GTK_SCROLL_PAGE_DOWN:
3178       if (should_invert (range))
3179         page_back (range);
3180       else
3181         page_forward (range);
3182       break;
3183
3184     case GTK_SCROLL_PAGE_BACKWARD:
3185       page_back (range);
3186       break;
3187
3188     case GTK_SCROLL_PAGE_FORWARD:
3189       page_forward (range);
3190       break;
3191
3192     case GTK_SCROLL_START:
3193       scroll_begin (range);
3194       break;
3195
3196     case GTK_SCROLL_END:
3197       scroll_end (range);
3198       break;
3199
3200     case GTK_SCROLL_JUMP:
3201       /* Used by CList, range doesn't use it. */
3202       break;
3203
3204     case GTK_SCROLL_NONE:
3205       break;
3206     }
3207
3208   return gtk_adjustment_get_value (priv->adjustment) != old_value;
3209 }
3210
3211 static void
3212 gtk_range_move_slider (GtkRange     *range,
3213                        GtkScrollType scroll)
3214 {
3215   GtkRangePrivate *priv = range->priv;
3216   gboolean cursor_only;
3217
3218   g_object_get (gtk_widget_get_settings (GTK_WIDGET (range)),
3219                 "gtk-keynav-cursor-only", &cursor_only,
3220                 NULL);
3221
3222   if (cursor_only)
3223     {
3224       GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (range));
3225
3226       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
3227         {
3228           if (scroll == GTK_SCROLL_STEP_UP ||
3229               scroll == GTK_SCROLL_STEP_DOWN)
3230             {
3231               if (toplevel)
3232                 gtk_widget_child_focus (toplevel,
3233                                         scroll == GTK_SCROLL_STEP_UP ?
3234                                         GTK_DIR_UP : GTK_DIR_DOWN);
3235               return;
3236             }
3237         }
3238       else
3239         {
3240           if (scroll == GTK_SCROLL_STEP_LEFT ||
3241               scroll == GTK_SCROLL_STEP_RIGHT)
3242             {
3243               if (toplevel)
3244                 gtk_widget_child_focus (toplevel,
3245                                         scroll == GTK_SCROLL_STEP_LEFT ?
3246                                         GTK_DIR_LEFT : GTK_DIR_RIGHT);
3247               return;
3248             }
3249         }
3250     }
3251
3252   if (! gtk_range_scroll (range, scroll))
3253     gtk_widget_error_bell (GTK_WIDGET (range));
3254 }
3255
3256 static void
3257 gtk_range_get_props (GtkRange  *range,
3258                      gint      *slider_width,
3259                      gint      *stepper_size,
3260                      gint      *focus_width,
3261                      gint      *trough_border,
3262                      gint      *stepper_spacing,
3263                      gboolean  *trough_under_steppers,
3264                      gint      *arrow_displacement_x,
3265                      gint      *arrow_displacement_y)
3266 {
3267   GtkWidget *widget =  GTK_WIDGET (range);
3268   gint tmp_slider_width, tmp_stepper_size, tmp_focus_width, tmp_trough_border;
3269   gint tmp_stepper_spacing, tmp_trough_under_steppers;
3270   gint tmp_arrow_displacement_x, tmp_arrow_displacement_y;
3271
3272   gtk_widget_style_get (widget,
3273                         "slider-width", &tmp_slider_width,
3274                         "trough-border", &tmp_trough_border,
3275                         "stepper-size", &tmp_stepper_size,
3276                         "stepper-spacing", &tmp_stepper_spacing,
3277                         "trough-under-steppers", &tmp_trough_under_steppers,
3278                         "arrow-displacement-x", &tmp_arrow_displacement_x,
3279                         "arrow-displacement-y", &tmp_arrow_displacement_y,
3280                         NULL);
3281
3282   if (gtk_widget_get_can_focus (GTK_WIDGET (range)))
3283     {
3284       gint focus_line_width;
3285       gint focus_padding;
3286
3287       gtk_widget_style_get (GTK_WIDGET (range),
3288                             "focus-line-width", &focus_line_width,
3289                             "focus-padding", &focus_padding,
3290                             NULL);
3291
3292       tmp_focus_width = focus_line_width + focus_padding;
3293     }
3294   else
3295     {
3296       tmp_focus_width = 0;
3297     }
3298
3299   if (slider_width)
3300     *slider_width = tmp_slider_width;
3301
3302   if (focus_width)
3303     *focus_width = tmp_focus_width;
3304
3305   if (trough_border)
3306     *trough_border = tmp_trough_border;
3307
3308   if (stepper_size)
3309     *stepper_size = tmp_stepper_size;
3310
3311   if (stepper_spacing)
3312     *stepper_spacing = tmp_stepper_spacing;
3313
3314   if (trough_under_steppers)
3315     *trough_under_steppers = tmp_trough_under_steppers;
3316
3317   if (arrow_displacement_x)
3318     *arrow_displacement_x = tmp_arrow_displacement_x;
3319
3320   if (arrow_displacement_y)
3321     *arrow_displacement_y = tmp_arrow_displacement_y;
3322 }
3323
3324 #define POINT_IN_RECT(xcoord, ycoord, rect) \
3325  ((xcoord) >= (rect).x &&                   \
3326   (xcoord) <  ((rect).x + (rect).width) &&  \
3327   (ycoord) >= (rect).y &&                   \
3328   (ycoord) <  ((rect).y + (rect).height))
3329
3330 /* Update mouse location, return TRUE if it changes */
3331 static gboolean
3332 gtk_range_update_mouse_location (GtkRange *range)
3333 {
3334   GtkRangePrivate *priv = range->priv;
3335   GtkAllocation allocation;
3336   gint x, y;
3337   MouseLocation old;
3338   GtkWidget *widget = GTK_WIDGET (range);
3339
3340   old = priv->mouse_location;
3341
3342   x = priv->mouse_x;
3343   y = priv->mouse_y;
3344
3345   gtk_widget_get_allocation (widget, &allocation);
3346
3347   if (priv->grab_location != MOUSE_OUTSIDE)
3348     priv->mouse_location = priv->grab_location;
3349   else if (POINT_IN_RECT (x, y, priv->stepper_a))
3350     priv->mouse_location = MOUSE_STEPPER_A;
3351   else if (POINT_IN_RECT (x, y, priv->stepper_b))
3352     priv->mouse_location = MOUSE_STEPPER_B;
3353   else if (POINT_IN_RECT (x, y, priv->stepper_c))
3354     priv->mouse_location = MOUSE_STEPPER_C;
3355   else if (POINT_IN_RECT (x, y, priv->stepper_d))
3356     priv->mouse_location = MOUSE_STEPPER_D;
3357   else if (POINT_IN_RECT (x, y, priv->slider))
3358     priv->mouse_location = MOUSE_SLIDER;
3359   else if (POINT_IN_RECT (x, y, priv->trough))
3360     priv->mouse_location = MOUSE_TROUGH;
3361   else if (POINT_IN_RECT (x, y, allocation))
3362     priv->mouse_location = MOUSE_WIDGET;
3363   else
3364     priv->mouse_location = MOUSE_OUTSIDE;
3365
3366   return old != priv->mouse_location;
3367 }
3368
3369 /* Clamp rect, border inside widget->allocation, such that we prefer
3370  * to take space from border not rect in all directions, and prefer to
3371  * give space to border over rect in one direction.
3372  */
3373 static void
3374 clamp_dimensions (GtkWidget    *widget,
3375                   GdkRectangle *rect,
3376                   GtkBorder    *border,
3377                   gboolean      border_expands_horizontally)
3378 {
3379   GtkAllocation allocation;
3380   gint extra, shortage;
3381
3382   g_return_if_fail (rect->x == 0);
3383   g_return_if_fail (rect->y == 0);
3384   g_return_if_fail (rect->width >= 0);
3385   g_return_if_fail (rect->height >= 0);
3386
3387   gtk_widget_get_allocation (widget, &allocation);
3388
3389   /* Width */
3390
3391   extra = allocation.width - border->left - border->right - rect->width;
3392   if (extra > 0)
3393     {
3394       if (border_expands_horizontally)
3395         {
3396           border->left += extra / 2;
3397           border->right += extra / 2 + extra % 2;
3398         }
3399       else
3400         {
3401           rect->width += extra;
3402         }
3403     }
3404
3405   /* See if we can fit rect, if not kill the border */
3406   shortage = rect->width - allocation.width;
3407   if (shortage > 0)
3408     {
3409       rect->width = allocation.width;
3410       /* lose the border */
3411       border->left = 0;
3412       border->right = 0;
3413     }
3414   else
3415     {
3416       /* See if we can fit rect with borders */
3417       shortage = rect->width + border->left + border->right - allocation.width;
3418       if (shortage > 0)
3419         {
3420           /* Shrink borders */
3421           border->left -= shortage / 2;
3422           border->right -= shortage / 2 + shortage % 2;
3423         }
3424     }
3425
3426   /* Height */
3427
3428   extra = allocation.height - border->top - border->bottom - rect->height;
3429   if (extra > 0)
3430     {
3431       if (border_expands_horizontally)
3432         {
3433           /* don't expand border vertically */
3434           rect->height += extra;
3435         }
3436       else
3437         {
3438           border->top += extra / 2;
3439           border->bottom += extra / 2 + extra % 2;
3440         }
3441     }
3442
3443   /* See if we can fit rect, if not kill the border */
3444   shortage = rect->height - allocation.height;
3445   if (shortage > 0)
3446     {
3447       rect->height = allocation.height;
3448       /* lose the border */
3449       border->top = 0;
3450       border->bottom = 0;
3451     }
3452   else
3453     {
3454       /* See if we can fit rect with borders */
3455       shortage = rect->height + border->top + border->bottom - allocation.height;
3456       if (shortage > 0)
3457         {
3458           /* Shrink borders */
3459           border->top -= shortage / 2;
3460           border->bottom -= shortage / 2 + shortage % 2;
3461         }
3462     }
3463 }
3464
3465 static void
3466 gtk_range_calc_request (GtkRange      *range,
3467                         gint           slider_width,
3468                         gint           stepper_size,
3469                         gint           focus_width,
3470                         gint           trough_border,
3471                         gint           stepper_spacing,
3472                         GdkRectangle  *range_rect,
3473                         GtkBorder     *border,
3474                         gint          *n_steppers_p,
3475                         gboolean      *has_steppers_ab,
3476                         gboolean      *has_steppers_cd,
3477                         gint          *slider_length_p)
3478 {
3479   GtkRangePrivate *priv = range->priv;
3480   gint slider_length;
3481   gint n_steppers;
3482   gint n_steppers_ab;
3483   gint n_steppers_cd;
3484
3485   border->left = 0;
3486   border->right = 0;
3487   border->top = 0;
3488   border->bottom = 0;
3489
3490   if (GTK_RANGE_GET_CLASS (range)->get_range_border)
3491     GTK_RANGE_GET_CLASS (range)->get_range_border (range, border);
3492
3493   n_steppers_ab = 0;
3494   n_steppers_cd = 0;
3495
3496   if (priv->has_stepper_a)
3497     n_steppers_ab += 1;
3498   if (priv->has_stepper_b)
3499     n_steppers_ab += 1;
3500   if (priv->has_stepper_c)
3501     n_steppers_cd += 1;
3502   if (priv->has_stepper_d)
3503     n_steppers_cd += 1;
3504
3505   n_steppers = n_steppers_ab + n_steppers_cd;
3506
3507   slider_length = priv->min_slider_size;
3508
3509   range_rect->x = 0;
3510   range_rect->y = 0;
3511
3512   /* We never expand to fill available space in the small dimension
3513    * (i.e. vertical scrollbars are always a fixed width)
3514    */
3515   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3516     {
3517       range_rect->width = (focus_width + trough_border) * 2 + slider_width;
3518       range_rect->height = stepper_size * n_steppers + (focus_width + trough_border) * 2 + slider_length;
3519
3520       if (n_steppers_ab > 0)
3521         range_rect->height += stepper_spacing;
3522
3523       if (n_steppers_cd > 0)
3524         range_rect->height += stepper_spacing;
3525     }
3526   else
3527     {
3528       range_rect->width = stepper_size * n_steppers + (focus_width + trough_border) * 2 + slider_length;
3529       range_rect->height = (focus_width + trough_border) * 2 + slider_width;
3530
3531       if (n_steppers_ab > 0)
3532         range_rect->width += stepper_spacing;
3533
3534       if (n_steppers_cd > 0)
3535         range_rect->width += stepper_spacing;
3536     }
3537
3538   if (n_steppers_p)
3539     *n_steppers_p = n_steppers;
3540
3541   if (has_steppers_ab)
3542     *has_steppers_ab = (n_steppers_ab > 0);
3543
3544   if (has_steppers_cd)
3545     *has_steppers_cd = (n_steppers_cd > 0);
3546
3547   if (slider_length_p)
3548     *slider_length_p = slider_length;
3549 }
3550
3551 static void
3552 gtk_range_calc_layout (GtkRange *range,
3553                        gdouble   adjustment_value)
3554 {
3555   GtkRangePrivate *priv = range->priv;
3556   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
3557   gint slider_length;
3558   GtkBorder border;
3559   gint n_steppers;
3560   gboolean has_steppers_ab;
3561   gboolean has_steppers_cd;
3562   gboolean trough_under_steppers;
3563   GdkRectangle range_rect;
3564   GtkWidget *widget;
3565
3566   if (!priv->need_recalc)
3567     return;
3568
3569   /* If we have a too-small allocation, we prefer the steppers over
3570    * the trough/slider, probably the steppers are a more useful
3571    * feature in small spaces.
3572    *
3573    * Also, we prefer to draw the range itself rather than the border
3574    * areas if there's a conflict, since the borders will be decoration
3575    * not controls. Though this depends on subclasses cooperating by
3576    * not drawing on priv->range_rect.
3577    */
3578
3579   widget = GTK_WIDGET (range);
3580
3581   gtk_range_get_props (range,
3582                        &slider_width, &stepper_size,
3583                        &focus_width, &trough_border,
3584                        &stepper_spacing, &trough_under_steppers,
3585                        NULL, NULL);
3586
3587   gtk_range_calc_request (range,
3588                           slider_width, stepper_size,
3589                           focus_width, trough_border, stepper_spacing,
3590                           &range_rect, &border, &n_steppers,
3591                           &has_steppers_ab, &has_steppers_cd, &slider_length);
3592
3593   /* We never expand to fill available space in the small dimension
3594    * (i.e. vertical scrollbars are always a fixed width)
3595    */
3596   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3597     {
3598       clamp_dimensions (widget, &range_rect, &border, TRUE);
3599     }
3600   else
3601     {
3602       clamp_dimensions (widget, &range_rect, &border, FALSE);
3603     }
3604
3605   range_rect.x = border.left;
3606   range_rect.y = border.top;
3607
3608   priv->range_rect = range_rect;
3609
3610   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3611     {
3612       gint stepper_width, stepper_height;
3613
3614       /* Steppers are the width of the range, and stepper_size in
3615        * height, or if we don't have enough height, divided equally
3616        * among available space.
3617        */
3618       stepper_width = range_rect.width - focus_width * 2;
3619
3620       if (trough_under_steppers)
3621         stepper_width -= trough_border * 2;
3622
3623       if (stepper_width < 1)
3624         stepper_width = range_rect.width; /* screw the trough border */
3625
3626       if (n_steppers == 0)
3627         stepper_height = 0; /* avoid divide by n_steppers */
3628       else
3629         stepper_height = MIN (stepper_size, (range_rect.height / n_steppers));
3630
3631       /* Stepper A */
3632
3633       priv->stepper_a.x = range_rect.x + focus_width + trough_border * trough_under_steppers;
3634       priv->stepper_a.y = range_rect.y + focus_width + trough_border * trough_under_steppers;
3635
3636       if (priv->has_stepper_a)
3637         {
3638           priv->stepper_a.width = stepper_width;
3639           priv->stepper_a.height = stepper_height;
3640         }
3641       else
3642         {
3643           priv->stepper_a.width = 0;
3644           priv->stepper_a.height = 0;
3645         }
3646
3647       /* Stepper B */
3648
3649       priv->stepper_b.x = priv->stepper_a.x;
3650       priv->stepper_b.y = priv->stepper_a.y + priv->stepper_a.height;
3651
3652       if (priv->has_stepper_b)
3653         {
3654           priv->stepper_b.width = stepper_width;
3655           priv->stepper_b.height = stepper_height;
3656         }
3657       else
3658         {
3659           priv->stepper_b.width = 0;
3660           priv->stepper_b.height = 0;
3661         }
3662
3663       /* Stepper D */
3664
3665       if (priv->has_stepper_d)
3666         {
3667           priv->stepper_d.width = stepper_width;
3668           priv->stepper_d.height = stepper_height;
3669         }
3670       else
3671         {
3672           priv->stepper_d.width = 0;
3673           priv->stepper_d.height = 0;
3674         }
3675
3676       priv->stepper_d.x = priv->stepper_a.x;
3677       priv->stepper_d.y = range_rect.y + range_rect.height - priv->stepper_d.height - focus_width - trough_border * trough_under_steppers;
3678
3679       /* Stepper C */
3680
3681       if (priv->has_stepper_c)
3682         {
3683           priv->stepper_c.width = stepper_width;
3684           priv->stepper_c.height = stepper_height;
3685         }
3686       else
3687         {
3688           priv->stepper_c.width = 0;
3689           priv->stepper_c.height = 0;
3690         }
3691
3692       priv->stepper_c.x = priv->stepper_a.x;
3693       priv->stepper_c.y = priv->stepper_d.y - priv->stepper_c.height;
3694
3695       /* Now the trough is the remaining space between steppers B and C,
3696        * if any, minus spacing
3697        */
3698       priv->trough.x = range_rect.x;
3699       priv->trough.y = priv->stepper_b.y + priv->stepper_b.height + stepper_spacing * has_steppers_ab;
3700       priv->trough.width = range_rect.width;
3701       priv->trough.height = priv->stepper_c.y - priv->trough.y - stepper_spacing * has_steppers_cd;
3702
3703       /* Slider fits into the trough, with stepper_spacing on either side,
3704        * and the size/position based on the adjustment or fixed, depending.
3705        */
3706       priv->slider.x = priv->trough.x + focus_width + trough_border;
3707       priv->slider.width = priv->trough.width - (focus_width + trough_border) * 2;
3708
3709       /* Compute slider position/length */
3710       {
3711         gint y, bottom, top, height;
3712
3713         top = priv->trough.y;
3714         bottom = priv->trough.y + priv->trough.height;
3715
3716         if (! trough_under_steppers)
3717           {
3718             top += trough_border;
3719             bottom -= trough_border;
3720           }
3721
3722         /* slider height is the fraction (page_size /
3723          * total_adjustment_range) times the trough height in pixels
3724          */
3725
3726         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0)
3727           height = ((bottom - top) * (gtk_adjustment_get_page_size (priv->adjustment) /
3728                                        (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment))));
3729         else
3730           height = priv->min_slider_size;
3731
3732         if (height < priv->min_slider_size ||
3733             priv->slider_size_fixed)
3734           height = priv->min_slider_size;
3735
3736         height = MIN (height, priv->trough.height);
3737
3738         y = top;
3739
3740         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) != 0)
3741           y += (bottom - top - height) * ((adjustment_value - gtk_adjustment_get_lower (priv->adjustment)) /
3742                                           (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3743
3744         y = CLAMP (y, top, bottom);
3745
3746         if (should_invert (range))
3747           y = bottom - (y - top + height);
3748
3749         priv->slider.y = y;
3750         priv->slider.height = height;
3751
3752         /* These are publically exported */
3753         priv->slider_start = priv->slider.y;
3754         priv->slider_end = priv->slider.y + priv->slider.height;
3755       }
3756     }
3757   else
3758     {
3759       gint stepper_width, stepper_height;
3760
3761       /* Steppers are the height of the range, and stepper_size in
3762        * width, or if we don't have enough width, divided equally
3763        * among available space.
3764        */
3765       stepper_height = range_rect.height + focus_width * 2;
3766
3767       if (trough_under_steppers)
3768         stepper_height -= trough_border * 2;
3769
3770       if (stepper_height < 1)
3771         stepper_height = range_rect.height; /* screw the trough border */
3772
3773       if (n_steppers == 0)
3774         stepper_width = 0; /* avoid divide by n_steppers */
3775       else
3776         stepper_width = MIN (stepper_size, (range_rect.width / n_steppers));
3777
3778       /* Stepper A */
3779
3780       priv->stepper_a.x = range_rect.x + focus_width + trough_border * trough_under_steppers;
3781       priv->stepper_a.y = range_rect.y + focus_width + trough_border * trough_under_steppers;
3782
3783       if (priv->has_stepper_a)
3784         {
3785           priv->stepper_a.width = stepper_width;
3786           priv->stepper_a.height = stepper_height;
3787         }
3788       else
3789         {
3790           priv->stepper_a.width = 0;
3791           priv->stepper_a.height = 0;
3792         }
3793
3794       /* Stepper B */
3795
3796       priv->stepper_b.x = priv->stepper_a.x + priv->stepper_a.width;
3797       priv->stepper_b.y = priv->stepper_a.y;
3798
3799       if (priv->has_stepper_b)
3800         {
3801           priv->stepper_b.width = stepper_width;
3802           priv->stepper_b.height = stepper_height;
3803         }
3804       else
3805         {
3806           priv->stepper_b.width = 0;
3807           priv->stepper_b.height = 0;
3808         }
3809
3810       /* Stepper D */
3811
3812       if (priv->has_stepper_d)
3813         {
3814           priv->stepper_d.width = stepper_width;
3815           priv->stepper_d.height = stepper_height;
3816         }
3817       else
3818         {
3819           priv->stepper_d.width = 0;
3820           priv->stepper_d.height = 0;
3821         }
3822
3823       priv->stepper_d.x = range_rect.x + range_rect.width - priv->stepper_d.width - focus_width - trough_border * trough_under_steppers;
3824       priv->stepper_d.y = priv->stepper_a.y;
3825
3826
3827       /* Stepper C */
3828
3829       if (priv->has_stepper_c)
3830         {
3831           priv->stepper_c.width = stepper_width;
3832           priv->stepper_c.height = stepper_height;
3833         }
3834       else
3835         {
3836           priv->stepper_c.width = 0;
3837           priv->stepper_c.height = 0;
3838         }
3839
3840       priv->stepper_c.x = priv->stepper_d.x - priv->stepper_c.width;
3841       priv->stepper_c.y = priv->stepper_a.y;
3842
3843       /* Now the trough is the remaining space between steppers B and C,
3844        * if any
3845        */
3846       priv->trough.x = priv->stepper_b.x + priv->stepper_b.width + stepper_spacing * has_steppers_ab;
3847       priv->trough.y = range_rect.y;
3848
3849       priv->trough.width = priv->stepper_c.x - priv->trough.x - stepper_spacing * has_steppers_cd;
3850       priv->trough.height = range_rect.height;
3851
3852       /* Slider fits into the trough, with stepper_spacing on either side,
3853        * and the size/position based on the adjustment or fixed, depending.
3854        */
3855       priv->slider.y = priv->trough.y + focus_width + trough_border;
3856       priv->slider.height = priv->trough.height - (focus_width + trough_border) * 2;
3857
3858       /* Compute slider position/length */
3859       {
3860         gint x, left, right, width;
3861
3862         left = priv->trough.x;
3863         right = priv->trough.x + priv->trough.width;
3864
3865         if (! trough_under_steppers)
3866           {
3867             left += trough_border;
3868             right -= trough_border;
3869           }
3870
3871         /* slider width is the fraction (page_size /
3872          * total_adjustment_range) times the trough width in pixels
3873          */
3874
3875         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0)
3876           width = ((right - left) * (gtk_adjustment_get_page_size (priv->adjustment) /
3877                                    (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment))));
3878         else
3879           width = priv->min_slider_size;
3880
3881         if (width < priv->min_slider_size ||
3882             priv->slider_size_fixed)
3883           width = priv->min_slider_size;
3884
3885         width = MIN (width, priv->trough.width);
3886
3887         x = left;
3888
3889         if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) != 0)
3890           x += (right - left - width) * ((adjustment_value - gtk_adjustment_get_lower (priv->adjustment)) /
3891                                          (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3892
3893         x = CLAMP (x, left, right);
3894
3895         if (should_invert (range))
3896           x = right - (x - left + width);
3897
3898         priv->slider.x = x;
3899         priv->slider.width = width;
3900
3901         /* These are publically exported */
3902         priv->slider_start = priv->slider.x;
3903         priv->slider_end = priv->slider.x + priv->slider.width;
3904       }
3905     }
3906
3907   gtk_range_update_mouse_location (range);
3908
3909   switch (priv->upper_sensitivity)
3910     {
3911     case GTK_SENSITIVITY_AUTO:
3912       priv->upper_sensitive =
3913         (gtk_adjustment_get_value (priv->adjustment) <
3914          (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
3915       break;
3916
3917     case GTK_SENSITIVITY_ON:
3918       priv->upper_sensitive = TRUE;
3919       break;
3920
3921     case GTK_SENSITIVITY_OFF:
3922       priv->upper_sensitive = FALSE;
3923       break;
3924     }
3925
3926   switch (priv->lower_sensitivity)
3927     {
3928     case GTK_SENSITIVITY_AUTO:
3929       priv->lower_sensitive =
3930         (gtk_adjustment_get_value (priv->adjustment) > gtk_adjustment_get_lower (priv->adjustment));
3931       break;
3932
3933     case GTK_SENSITIVITY_ON:
3934       priv->lower_sensitive = TRUE;
3935       break;
3936
3937     case GTK_SENSITIVITY_OFF:
3938       priv->lower_sensitive = FALSE;
3939       break;
3940     }
3941 }
3942
3943 static GdkRectangle*
3944 get_area (GtkRange     *range,
3945           MouseLocation location)
3946 {
3947   GtkRangePrivate *priv = range->priv;
3948
3949   switch (location)
3950     {
3951     case MOUSE_STEPPER_A:
3952       return &priv->stepper_a;
3953     case MOUSE_STEPPER_B:
3954       return &priv->stepper_b;
3955     case MOUSE_STEPPER_C:
3956       return &priv->stepper_c;
3957     case MOUSE_STEPPER_D:
3958       return &priv->stepper_d;
3959     case MOUSE_TROUGH:
3960       return &priv->trough;
3961     case MOUSE_SLIDER:
3962       return &priv->slider;
3963     case MOUSE_WIDGET:
3964     case MOUSE_OUTSIDE:
3965       break;
3966     }
3967
3968   g_warning (G_STRLOC": bug");
3969   return NULL;
3970 }
3971
3972 static void
3973 gtk_range_calc_marks (GtkRange *range)
3974 {
3975   GtkRangePrivate *priv = range->priv;
3976   gint i;
3977
3978   if (!priv->recalc_marks)
3979     return;
3980
3981   priv->recalc_marks = FALSE;
3982
3983   for (i = 0; i < priv->n_marks; i++)
3984     {
3985       priv->need_recalc = TRUE;
3986       gtk_range_calc_layout (range, priv->marks[i]);
3987       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
3988         priv->mark_pos[i] = priv->slider.x + priv->slider.width / 2;
3989       else
3990         priv->mark_pos[i] = priv->slider.y + priv->slider.height / 2;
3991     }
3992
3993   priv->need_recalc = TRUE;
3994 }
3995
3996 static gboolean
3997 gtk_range_real_change_value (GtkRange     *range,
3998                              GtkScrollType scroll,
3999                              gdouble       value)
4000 {
4001   GtkRangePrivate *priv = range->priv;
4002
4003   /* potentially adjust the bounds _before_ we clamp */
4004   g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value);
4005
4006   if (priv->restrict_to_fill_level)
4007     value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment),
4008                              priv->fill_level));
4009
4010   value = CLAMP (value, gtk_adjustment_get_lower (priv->adjustment),
4011                  (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
4012
4013   if (priv->round_digits >= 0)
4014     {
4015       gdouble power;
4016       gint i;
4017
4018       i = priv->round_digits;
4019       power = 1;
4020       while (i--)
4021         power *= 10;
4022
4023       value = floor ((value * power) + 0.5) / power;
4024     }
4025
4026   if (gtk_adjustment_get_value (priv->adjustment) != value)
4027     {
4028       priv->need_recalc = TRUE;
4029
4030       gtk_widget_queue_draw (GTK_WIDGET (range));
4031
4032       gtk_adjustment_set_value (priv->adjustment, value);
4033     }
4034   return FALSE;
4035 }
4036
4037 struct _GtkRangeStepTimer
4038 {
4039   guint timeout_id;
4040   GtkScrollType step;
4041 };
4042
4043 static gboolean
4044 second_timeout (gpointer data)
4045 {
4046   GtkRange *range = GTK_RANGE (data);
4047   GtkRangePrivate *priv = range->priv;
4048
4049   gtk_range_scroll (range, priv->timer->step);
4050
4051   return TRUE;
4052 }
4053
4054 static gboolean
4055 initial_timeout (gpointer data)
4056 {
4057   GtkRange *range = GTK_RANGE (data);
4058   GtkRangePrivate *priv = range->priv;
4059   GtkSettings *settings;
4060   guint        timeout;
4061
4062   settings = gtk_widget_get_settings (GTK_WIDGET (data));
4063   g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
4064
4065   priv->timer->timeout_id = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
4066                                                      second_timeout,
4067                                                      range);
4068   /* remove self */
4069   return FALSE;
4070 }
4071
4072 static void
4073 gtk_range_add_step_timer (GtkRange      *range,
4074                           GtkScrollType  step)
4075 {
4076   GtkRangePrivate *priv = range->priv;
4077   GtkSettings *settings;
4078   guint        timeout;
4079
4080   g_return_if_fail (priv->timer == NULL);
4081   g_return_if_fail (step != GTK_SCROLL_NONE);
4082
4083   settings = gtk_widget_get_settings (GTK_WIDGET (range));
4084   g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
4085
4086   priv->timer = g_new (GtkRangeStepTimer, 1);
4087
4088   priv->timer->timeout_id = gdk_threads_add_timeout (timeout,
4089                                                      initial_timeout,
4090                                                      range);
4091   priv->timer->step = step;
4092
4093   gtk_range_scroll (range, priv->timer->step);
4094 }
4095
4096 static void
4097 gtk_range_remove_step_timer (GtkRange *range)
4098 {
4099   GtkRangePrivate *priv = range->priv;
4100
4101   if (priv->timer)
4102     {
4103       if (priv->timer->timeout_id != 0)
4104         g_source_remove (priv->timer->timeout_id);
4105
4106       g_free (priv->timer);
4107
4108       priv->timer = NULL;
4109     }
4110 }
4111
4112 void
4113 _gtk_range_set_has_origin (GtkRange *range,
4114                            gboolean  has_origin)
4115 {
4116   range->priv->has_origin = has_origin;
4117 }
4118
4119 gboolean
4120 _gtk_range_get_has_origin (GtkRange *range)
4121 {
4122   return range->priv->has_origin;
4123 }
4124
4125 void
4126 _gtk_range_set_stop_values (GtkRange *range,
4127                             gdouble  *values,
4128                             gint      n_values)
4129 {
4130   GtkRangePrivate *priv = range->priv;
4131   gint i;
4132
4133   g_free (priv->marks);
4134   priv->marks = g_new (gdouble, n_values);
4135
4136   g_free (priv->mark_pos);
4137   priv->mark_pos = g_new (gint, n_values);
4138
4139   priv->n_marks = n_values;
4140
4141   for (i = 0; i < n_values; i++)
4142     priv->marks[i] = values[i];
4143
4144   priv->recalc_marks = TRUE;
4145 }
4146
4147 gint
4148 _gtk_range_get_stop_positions (GtkRange  *range,
4149                                gint     **values)
4150 {
4151   GtkRangePrivate *priv = range->priv;
4152
4153   gtk_range_calc_marks (range);
4154
4155   if (values)
4156     *values = g_memdup (priv->mark_pos, priv->n_marks * sizeof (gint));
4157
4158   return priv->n_marks;
4159 }
4160
4161 /**
4162  * gtk_range_set_round_digits:
4163  * @range: a #GtkRange
4164  * @round_digits: the precision in digits, or -1
4165  *
4166  * Sets the number of digits to round the value to when
4167  * it changes. See #GtkRange::change-value.
4168  *
4169  * Since: 2.24
4170  */
4171 void
4172 gtk_range_set_round_digits (GtkRange *range,
4173                             gint      round_digits)
4174 {
4175   g_return_if_fail (GTK_IS_RANGE (range));
4176   g_return_if_fail (round_digits >= -1);
4177
4178   range->priv->round_digits = round_digits;
4179
4180   g_object_notify (G_OBJECT (range), "round-digits");
4181 }
4182
4183 /**
4184  * gtk_range_get_round_digits:
4185  * @range: a #GtkRange
4186  *
4187  * Gets the number of digits to round the value to when
4188  * it changes. See #GtkRange::change-value.
4189  *
4190  * Return value: the number of digits to round to
4191  *
4192  * Since: 2.24
4193  */
4194 gint
4195 gtk_range_get_round_digits (GtkRange *range)
4196 {
4197   g_return_val_if_fail (GTK_IS_RANGE (range), -1);
4198
4199   return range->priv->round_digits;
4200 }
4201
4202 void
4203 _gtk_range_set_steppers (GtkRange      *range,
4204                          gboolean       has_a,
4205                          gboolean       has_b,
4206                          gboolean       has_c,
4207                          gboolean       has_d)
4208 {
4209   range->priv->has_stepper_a = has_a;
4210   range->priv->has_stepper_b = has_b;
4211   range->priv->has_stepper_c = has_c;
4212   range->priv->has_stepper_d = has_d;
4213 }