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 "gtkmainprivate.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtkorientable.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 "gtktypebuiltins.h"
  43
  44 /**
  45  * SECTION:gtkrange
  46  * @Short_description: Base class for widgets which visualize an adjustment
  47  * @Title: GtkRange
  48  *
  49  * #GtkRange is the common base class for widgets which visualize an
  50  * adjustment, e.g #GtkScale or #GtkScrollbar.
  51  *
  52  * Apart from signals for monitoring the parameters of the adjustment,
  53  * #GtkRange provides properties and methods for influencing the sensitivity
  54  * of the "steppers". It also provides properties and methods for setting a
  55  * "fill level" on range widgets. See gtk_range_set_fill_level().
  56  */
  57
  58
  59 #define SCROLL_DELAY_FACTOR 5    /* Scroll repeat multiplier */
  60 #define UPDATE_DELAY        300  /* Delay for queued update */
  61
  62 typedef struct _GtkRangeStepTimer GtkRangeStepTimer;
  63
  64 typedef enum {
  65   MOUSE_OUTSIDE,
  66   MOUSE_STEPPER_A,
  67   MOUSE_STEPPER_B,
  68   MOUSE_STEPPER_C,
  69   MOUSE_STEPPER_D,
  70   MOUSE_TROUGH,
  71   MOUSE_SLIDER,
  72   MOUSE_WIDGET /* inside widget but not in any of the above GUI elements */
  73 } MouseLocation;
  74
  75 struct _GtkRangePrivate
  76 {
  77   MouseLocation      mouse_location;
  78   /* last mouse coords we got, or -1 if mouse is outside the range */
  79   gint  mouse_x;
  80   gint  mouse_y;
  81   MouseLocation      grab_location;   /* "grabbed" mouse location, OUTSIDE for no grab */
  82   guint              grab_button : 8; /* 0 if none */
  83
  84   GtkRangeStepTimer *timer;
  85
  86   GtkAdjustment     *adjustment;
  87   GtkOrientation     orientation;
  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   gboolean recalc_marks;
 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 slider_size_fixed      : 1;
 133   guint trough_click_forward   : 1;  /* trough click was on the forward side of slider */
 134
 135   /* Stepper sensitivity */
 136   guint lower_sensitive        : 1;
 137   guint upper_sensitive        : 1;
 138
 139   /* Fill level */
 140   guint show_fill_level        : 1;
 141   guint restrict_to_fill_level : 1;
 142 };
 143
 144
 145 enum {
 146   PROP_0,
 147   PROP_ORIENTATION,
 148   PROP_ADJUSTMENT,
 149   PROP_INVERTED,
 150   PROP_LOWER_STEPPER_SENSITIVITY,
 151   PROP_UPPER_STEPPER_SENSITIVITY,
 152   PROP_SHOW_FILL_LEVEL,
 153   PROP_RESTRICT_TO_FILL_LEVEL,
 154   PROP_FILL_LEVEL
 155 };
 156
 157 enum {
 158   VALUE_CHANGED,
 159   ADJUST_BOUNDS,
 160   MOVE_SLIDER,
 161   CHANGE_VALUE,
 162   LAST_SIGNAL
 163 };
 164
 165 typedef enum {
 166   STEPPER_A,
 167   STEPPER_B,
 168   STEPPER_C,
 169   STEPPER_D
 170 } Stepper;
 171
 172 static void gtk_range_set_property   (GObject          *object,
 173                                       guint             prop_id,
 174                                       const GValue     *value,
 175                                       GParamSpec       *pspec);
 176 static void gtk_range_get_property   (GObject          *object,
 177                                       guint             prop_id,
 178                                       GValue           *value,
 179                                       GParamSpec       *pspec);
 180 static void gtk_range_destroy        (GtkWidget        *widget);
 181 static void gtk_range_get_preferred_width
 182                                      (GtkWidget        *widget,
 183                                       gint             *minimum,
 184                                       gint             *natural);
 185 static void gtk_range_get_preferred_height
 186                                      (GtkWidget        *widget,
 187                                       gint             *minimum,
 188                                       gint             *natural);
 189 static void gtk_range_size_allocate  (GtkWidget        *widget,
 190                                       GtkAllocation    *allocation);
 191 static void gtk_range_hierarchy_changed (GtkWidget     *widget,
 192                                          GtkWidget     *previous_toplevel);
 193 static void gtk_range_realize        (GtkWidget        *widget);
 194 static void gtk_range_unrealize      (GtkWidget        *widget);
 195 static void gtk_range_map            (GtkWidget        *widget);
 196 static void gtk_range_unmap          (GtkWidget        *widget);
 197 static gboolean gtk_range_draw       (GtkWidget        *widget,
 198                                       cairo_t          *cr);
 199 static gboolean gtk_range_button_press   (GtkWidget        *widget,
 200                                       GdkEventButton   *event);
 201 static gboolean gtk_range_button_release (GtkWidget        *widget,
 202                                       GdkEventButton   *event);
 203 static gboolean gtk_range_motion_notify  (GtkWidget        *widget,
 204                                       GdkEventMotion   *event);
 205 static gboolean gtk_range_enter_notify   (GtkWidget        *widget,
 206                                       GdkEventCrossing *event);
 207 static gboolean gtk_range_leave_notify   (GtkWidget        *widget,
 208                                       GdkEventCrossing *event);
 209 static gboolean gtk_range_grab_broken (GtkWidget          *widget,
 210                                        GdkEventGrabBroken *event);
 211 static void gtk_range_grab_notify    (GtkWidget          *widget,
 212                                       gboolean            was_grabbed);
 213 static void gtk_range_state_flags_changed  (GtkWidget      *widget,
 214                                             GtkStateFlags   previous_state);
 215 static gboolean gtk_range_scroll_event   (GtkWidget        *widget,
 216                                       GdkEventScroll   *event);
 217 static void gtk_range_style_updated  (GtkWidget        *widget);
 218 static void update_slider_position   (GtkRange         *range,
 219                                       gint              mouse_x,
 220                                       gint              mouse_y);
 221 static void stop_scrolling           (GtkRange         *range);
 222 static gboolean modify_allocation_for_window_grip (GtkWidget     *widget,
 223                                                    GtkAllocation *allocation);
 224
 225 /* Range methods */
 226
 227 static void gtk_range_move_slider              (GtkRange         *range,
 228                                                 GtkScrollType     scroll);
 229
 230 /* Internals */
 231 static gboolean      gtk_range_scroll                   (GtkRange      *range,
 232                                                          GtkScrollType  scroll);
 233 static gboolean      gtk_range_update_mouse_location    (GtkRange      *range);
 234 static void          gtk_range_calc_layout              (GtkRange      *range,
 235                                                          gdouble        adjustment_value);
 236 static void          gtk_range_calc_marks               (GtkRange      *range);
 237 static void          gtk_range_get_props                (GtkRange      *range,
 238                                                          gint          *slider_width,
 239                                                          gint          *stepper_size,
 240                                                          gint          *focus_width,
 241                                                          gint          *trough_border,
 242                                                          gint          *stepper_spacing,
 243                                                          gboolean      *trough_under_steppers,
 244                                                          gint          *arrow_displacement_x,
 245                                                          gint          *arrow_displacement_y);
 246 static void          gtk_range_calc_request             (GtkRange      *range,
 247                                                          gint           slider_width,
 248                                                          gint           stepper_size,
 249                                                          gint           focus_width,
 250                                                          gint           trough_border,
 251                                                          gint           stepper_spacing,
 252                                                          GdkRectangle  *range_rect,
 253                                                          GtkBorder     *border,
 254                                                          gint          *n_steppers_p,
 255                                                          gboolean      *has_steppers_ab,
 256                                                          gboolean      *has_steppers_cd,
 257                                                          gint          *slider_length_p);
 258 static void          gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
 259                                                          gpointer       data);
 260 static void          gtk_range_adjustment_changed       (GtkAdjustment *adjustment,
 261                                                          gpointer       data);
 262 static void          gtk_range_add_step_timer           (GtkRange      *range,
 263                                                          GtkScrollType  step);
 264 static void          gtk_range_remove_step_timer        (GtkRange      *range);
 265 static GdkRectangle* get_area                           (GtkRange      *range,
 266                                                          MouseLocation  location);
 267 static gboolean      gtk_range_real_change_value        (GtkRange      *range,
 268                                                          GtkScrollType  scroll,
 269                                                          gdouble        value);
 270 static gboolean      gtk_range_key_press                (GtkWidget     *range,
 271                                                          GdkEventKey   *event);
 272
 273
 274 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GtkRange, gtk_range, GTK_TYPE_WIDGET,
 275                                   G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 276                                                          NULL))
 277
 278 static guint signals[LAST_SIGNAL];
 279
 280
 281 static void
 282 gtk_range_class_init (GtkRangeClass *class)
 283 {
 284   GObjectClass   *gobject_class;
 285   GtkWidgetClass *widget_class;
 286
 287   gobject_class = G_OBJECT_CLASS (class);
 288   widget_class = (GtkWidgetClass*) class;
 289
 290   gobject_class->set_property = gtk_range_set_property;
 291   gobject_class->get_property = gtk_range_get_property;
 292
 293   widget_class->destroy = gtk_range_destroy;
 294   widget_class->get_preferred_width = gtk_range_get_preferred_width;
 295   widget_class->get_preferred_height = gtk_range_get_preferred_height;
 296   widget_class->size_allocate = gtk_range_size_allocate;
 297   widget_class->hierarchy_changed = gtk_range_hierarchy_changed;
 298   widget_class->realize = gtk_range_realize;
 299   widget_class->unrealize = gtk_range_unrealize;
 300   widget_class->map = gtk_range_map;
 301   widget_class->unmap = gtk_range_unmap;
 302   widget_class->draw = gtk_range_draw;
 303   widget_class->button_press_event = gtk_range_button_press;
 304   widget_class->button_release_event = gtk_range_button_release;
 305   widget_class->motion_notify_event = gtk_range_motion_notify;
 306   widget_class->scroll_event = gtk_range_scroll_event;
 307   widget_class->enter_notify_event = gtk_range_enter_notify;
 308   widget_class->leave_notify_event = gtk_range_leave_notify;
 309   widget_class->grab_broken_event = gtk_range_grab_broken;
 310   widget_class->grab_notify = gtk_range_grab_notify;
 311   widget_class->state_flags_changed = gtk_range_state_flags_changed;
 312   widget_class->style_updated = gtk_range_style_updated;
 313   widget_class->key_press_event = gtk_range_key_press;
 314
 315   class->move_slider = gtk_range_move_slider;
 316   class->change_value = gtk_range_real_change_value;
 317
 318   class->slider_detail = "slider";
 319   class->stepper_detail = "stepper";
 320
 321   /**
 322    * GtkRange::value-changed:
 323    * @range: the #GtkRange that received the signal
 324    *
 325    * Emitted when the range value changes.
 326    */
 327   signals[VALUE_CHANGED] =
 328     g_signal_new (I_("value-changed"),
 329                   G_TYPE_FROM_CLASS (gobject_class),
 330                   G_SIGNAL_RUN_LAST,
 331                   G_STRUCT_OFFSET (GtkRangeClass, value_changed),
 332                   NULL, NULL,
 333                   _gtk_marshal_VOID__VOID,
 334                   G_TYPE_NONE, 0);
 335
 336   /**
 337    * GtkRange::adjust-bounds:
 338    * @range: the #GtkRange that received the signal
 339    * @value: the value before we clamp
 340    *
 341    * Emitted before clamping a value, to give the application a
 342    * chance to adjust the bounds.
 343    */
 344   signals[ADJUST_BOUNDS] =
 345     g_signal_new (I_("adjust-bounds"),
 346                   G_TYPE_FROM_CLASS (gobject_class),
 347                   G_SIGNAL_RUN_LAST,
 348                   G_STRUCT_OFFSET (GtkRangeClass, adjust_bounds),
 349                   NULL, NULL,
 350                   _gtk_marshal_VOID__DOUBLE,
 351                   G_TYPE_NONE, 1,
 352                   G_TYPE_DOUBLE);
 353
 354   /**
 355    * GtkRange::move-slider:
 356    * @range: the #GtkRange that received the signal
 357    * @step: how to move the slider
 358    *
 359    * Virtual function that moves the slider. Used for keybindings.
 360    */
 361   signals[MOVE_SLIDER] =
 362     g_signal_new (I_("move-slider"),
 363                   G_TYPE_FROM_CLASS (gobject_class),
 364                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 365                   G_STRUCT_OFFSET (GtkRangeClass, move_slider),
 366                   NULL, NULL,
 367                   _gtk_marshal_VOID__ENUM,
 368                   G_TYPE_NONE, 1,
 369                   GTK_TYPE_SCROLL_TYPE);
 370
 371   /**
 372    * GtkRange::change-value:
 373    * @range: the #GtkRange that received the signal
 374    * @scroll: the type of scroll action that was performed
 375    * @value: the new value resulting from the scroll action
 376    * @returns: %TRUE to prevent other handlers from being invoked for the
 377    * signal, %FALSE to propagate the signal further
 378    *
 379    * The ::change-value signal is emitted when a scroll action is
 380    * performed on a range.  It allows an application to determine the
 381    * type of scroll event that occurred and the resultant new value.
 382    * The application can handle the event itself and return %TRUE to
 383    * prevent further processing.  Or, by returning %FALSE, it can pass
 384    * the event to other handlers until the default GTK+ handler is
 385    * reached.
 386    *
 387    * The value parameter is unrounded.  An application that overrides
 388    * the ::change-value signal is responsible for clamping the value to
 389    * the desired number of decimal digits; the default GTK+ handler
 390    * clamps the value based on @range->round_digits.
 391    *
 392    * It is not possible to use delayed update policies in an overridden
 393    * ::change-value handler.
 394    *
 395    * Since: 2.6
 396    */
 397   signals[CHANGE_VALUE] =
 398     g_signal_new (I_("change-value"),
 399                   G_TYPE_FROM_CLASS (gobject_class),
 400                   G_SIGNAL_RUN_LAST,
 401                   G_STRUCT_OFFSET (GtkRangeClass, change_value),
 402                   _gtk_boolean_handled_accumulator, NULL,
 403                   _gtk_marshal_BOOLEAN__ENUM_DOUBLE,
 404                   G_TYPE_BOOLEAN, 2,
 405                   GTK_TYPE_SCROLL_TYPE,
 406                   G_TYPE_DOUBLE);
 407
 408   g_object_class_override_property (gobject_class,
 409                                     PROP_ORIENTATION,
 410                                     "orientation");
 411
 412   g_object_class_install_property (gobject_class,
 413                                    PROP_ADJUSTMENT,
 414                                    g_param_spec_object ("adjustment",
 415                                                         P_("Adjustment"),
 416                                                         P_("The GtkAdjustment that contains the current value of this range object"),
 417                                                         GTK_TYPE_ADJUSTMENT,
 418                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 419
 420   g_object_class_install_property (gobject_class,
 421                                    PROP_INVERTED,
 422                                    g_param_spec_boolean ("inverted",
 423                                                         P_("Inverted"),
 424                                                         P_("Invert direction slider moves to increase range value"),
 425                                                          FALSE,
 426                                                          GTK_PARAM_READWRITE));
 427
 428   g_object_class_install_property (gobject_class,
 429                                    PROP_LOWER_STEPPER_SENSITIVITY,
 430                                    g_param_spec_enum ("lower-stepper-sensitivity",
 431                                                       P_("Lower stepper sensitivity"),
 432                                                       P_("The sensitivity policy for the stepper that points to the adjustment's lower side"),
 433                                                       GTK_TYPE_SENSITIVITY_TYPE,
 434                                                       GTK_SENSITIVITY_AUTO,
 435                                                       GTK_PARAM_READWRITE));
 436
 437   g_object_class_install_property (gobject_class,
 438                                    PROP_UPPER_STEPPER_SENSITIVITY,
 439                                    g_param_spec_enum ("upper-stepper-sensitivity",
 440                                                       P_("Upper stepper sensitivity"),
 441                                                       P_("The sensitivity policy for the stepper that points to the adjustment's upper side"),
 442                                                       GTK_TYPE_SENSITIVITY_TYPE,
 443                                                       GTK_SENSITIVITY_AUTO,
 444                                                       GTK_PARAM_READWRITE));
 445
 446   /**
 447    * GtkRange:show-fill-level:
 448    *
 449    * The show-fill-level property controls whether fill level indicator
 450    * graphics are displayed on the trough. See
 451    * gtk_range_set_show_fill_level().
 452    *
 453    * Since: 2.12
 454    **/
 455   g_object_class_install_property (gobject_class,
 456                                    PROP_SHOW_FILL_LEVEL,
 457                                    g_param_spec_boolean ("show-fill-level",
 458                                                          P_("Show Fill Level"),
 459                                                          P_("Whether to display a fill level indicator graphics on trough."),
 460                                                          FALSE,
 461                                                          GTK_PARAM_READWRITE));
 462
 463   /**
 464    * GtkRange:restrict-to-fill-level:
 465    *
 466    * The restrict-to-fill-level property controls whether slider
 467    * movement is restricted to an upper boundary set by the
 468    * fill level. See gtk_range_set_restrict_to_fill_level().
 469    *
 470    * Since: 2.12
 471    **/
 472   g_object_class_install_property (gobject_class,
 473                                    PROP_RESTRICT_TO_FILL_LEVEL,
 474                                    g_param_spec_boolean ("restrict-to-fill-level",
 475                                                          P_("Restrict to Fill Level"),
 476                                                          P_("Whether to restrict the upper boundary to the fill level."),
 477                                                          TRUE,
 478                                                          GTK_PARAM_READWRITE));
 479
 480   /**
 481    * GtkRange:fill-level:
 482    *
 483    * The fill level (e.g. prebuffering of a network stream).
 484    * See gtk_range_set_fill_level().
 485    *
 486    * Since: 2.12
 487    **/
 488   g_object_class_install_property (gobject_class,
 489                                    PROP_FILL_LEVEL,
 490                                    g_param_spec_double ("fill-level",
 491                                                         P_("Fill Level"),
 492                                                         P_("The fill level."),
 493                                                         -G_MAXDOUBLE,
 494                                                         G_MAXDOUBLE,
 495                                                         G_MAXDOUBLE,
 496                                                         GTK_PARAM_READWRITE));
 497
 498   gtk_widget_class_install_style_property (widget_class,
 499                                            g_param_spec_int ("slider-width",
 500                                                              P_("Slider Width"),
 501                                                              P_("Width of scrollbar or scale thumb"),
 502                                                              0,
 503                                                              G_MAXINT,
 504                                                              14,
 505                                                              GTK_PARAM_READABLE));
 506   gtk_widget_class_install_style_property (widget_class,
 507                                            g_param_spec_int ("trough-border",
 508                                                              P_("Trough Border"),
 509                                                              P_("Spacing between thumb/steppers and outer trough bevel"),
 510                                                              0,
 511                                                              G_MAXINT,
 512                                                              1,
 513                                                              GTK_PARAM_READABLE));
 514   gtk_widget_class_install_style_property (widget_class,
 515                                            g_param_spec_int ("stepper-size",
 516                                                              P_("Stepper Size"),
 517                                                              P_("Length of step buttons at ends"),
 518                                                              0,
 519                                                              G_MAXINT,
 520                                                              14,
 521                                                              GTK_PARAM_READABLE));
 522   /**
 523    * GtkRange:stepper-spacing:
 524    *
 525    * The spacing between the stepper buttons and thumb. Note that
 526    * setting this value to anything > 0 will automatically set the
 527    * trough-under-steppers style property to %TRUE as well. Also,
 528    * stepper-spacing won't have any effect if there are no steppers.
 529    */
 530   gtk_widget_class_install_style_property (widget_class,
 531                                            g_param_spec_int ("stepper-spacing",
 532                                                              P_("Stepper Spacing"),
 533                                                              P_("Spacing between step buttons and thumb"),
 534                                                              0,
 535                                                              G_MAXINT,
 536                                                              0,
 537                                                              GTK_PARAM_READABLE));
 538   gtk_widget_class_install_style_property (widget_class,
 539                                            g_param_spec_int ("arrow-displacement-x",
 540                                                              P_("Arrow X Displacement"),
 541                                                              P_("How far in the x direction to move the arrow when the button is depressed"),
 542                                                              G_MININT,
 543                                                              G_MAXINT,
 544                                                              0,
 545                                                              GTK_PARAM_READABLE));
 546   gtk_widget_class_install_style_property (widget_class,
 547                                            g_param_spec_int ("arrow-displacement-y",
 548                                                              P_("Arrow Y Displacement"),
 549                                                              P_("How far in the y direction to move the arrow when the button is depressed"),
 550                                                              G_MININT,
 551                                                              G_MAXINT,
 552                                                              0,
 553                                                              GTK_PARAM_READABLE));
 554
 555   /**
 556    * GtkRange:trough-under-steppers:
 557    *
 558    * Whether to draw the trough across the full length of the range or
 559    * to exclude the steppers and their spacing. Note that setting the
 560    * #GtkRange:stepper-spacing style property to any value > 0 will
 561    * automatically enable trough-under-steppers too.
 562    *
 563    * Since: 2.10
 564    */
 565   gtk_widget_class_install_style_property (widget_class,
 566                                            g_param_spec_boolean ("trough-under-steppers",
 567                                                                  P_("Trough Under Steppers"),
 568                                                                  P_("Whether to draw trough for full length of range or exclude the steppers and spacing"),
 569                                                                  TRUE,
 570                                                                  GTK_PARAM_READABLE));
 571
 572   /**
 573    * GtkRange:arrow-scaling:
 574    *
 575    * The arrow size proportion relative to the scroll button size.
 576    *
 577    * Since: 2.14
 578    */
 579   gtk_widget_class_install_style_property (widget_class,
 580                                            g_param_spec_float ("arrow-scaling",
 581                                                                P_("Arrow scaling"),
 582                                                                P_("Arrow scaling with regard to scroll button size"),
 583                                                                0.0, 1.0, 0.5,
 584                                                                GTK_PARAM_READABLE));
 585
 586   g_type_class_add_private (class, sizeof (GtkRangePrivate));
 587 }
 588
 589 static void
 590 gtk_range_set_property (GObject      *object,
 591                         guint         prop_id,
 592                         const GValue *value,
 593                         GParamSpec   *pspec)
 594 {
 595   GtkRange *range = GTK_RANGE (object);
 596   GtkRangePrivate *priv = range->priv;
 597
 598   switch (prop_id)
 599     {
 600     case PROP_ORIENTATION:
 601       priv->orientation = g_value_get_enum (value);
 602
 603       priv->slider_detail_quark = 0;
 604       priv->stepper_detail_quark[0] = 0;
 605       priv->stepper_detail_quark[1] = 0;
 606       priv->stepper_detail_quark[2] = 0;
 607       priv->stepper_detail_quark[3] = 0;
 608
 609       gtk_widget_queue_resize (GTK_WIDGET (range));
 610       break;
 611     case PROP_ADJUSTMENT:
 612       gtk_range_set_adjustment (range, g_value_get_object (value));
 613       break;
 614     case PROP_INVERTED:
 615       gtk_range_set_inverted (range, g_value_get_boolean (value));
 616       break;
 617     case PROP_LOWER_STEPPER_SENSITIVITY:
 618       gtk_range_set_lower_stepper_sensitivity (range, g_value_get_enum (value));
 619       break;
 620     case PROP_UPPER_STEPPER_SENSITIVITY:
 621       gtk_range_set_upper_stepper_sensitivity (range, g_value_get_enum (value));
 622       break;
 623     case PROP_SHOW_FILL_LEVEL:
 624       gtk_range_set_show_fill_level (range, g_value_get_boolean (value));
 625       break;
 626     case PROP_RESTRICT_TO_FILL_LEVEL:
 627       gtk_range_set_restrict_to_fill_level (range, g_value_get_boolean (value));
 628       break;
 629     case PROP_FILL_LEVEL:
 630       gtk_range_set_fill_level (range, g_value_get_double (value));
 631       break;
 632     default:
 633       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 634       break;
 635     }
 636 }
 637
 638 static void
 639 gtk_range_get_property (GObject      *object,
 640                         guint         prop_id,
 641                         GValue       *value,
 642                         GParamSpec   *pspec)
 643 {
 644   GtkRange *range = GTK_RANGE (object);
 645   GtkRangePrivate *priv = range->priv;
 646
 647   switch (prop_id)
 648     {
 649     case PROP_ORIENTATION:
 650       g_value_set_enum (value, priv->orientation);
 651       break;
 652     case PROP_ADJUSTMENT:
 653       g_value_set_object (value, priv->adjustment);
 654       break;
 655     case PROP_INVERTED:
 656       g_value_set_boolean (value, priv->inverted);
 657       break;
 658     case PROP_LOWER_STEPPER_SENSITIVITY:
 659       g_value_set_enum (value, gtk_range_get_lower_stepper_sensitivity (range));
 660       break;
 661     case PROP_UPPER_STEPPER_SENSITIVITY:
 662       g_value_set_enum (value, gtk_range_get_upper_stepper_sensitivity (range));
 663       break;
 664     case PROP_SHOW_FILL_LEVEL:
 665       g_value_set_boolean (value, gtk_range_get_show_fill_level (range));
 666       break;
 667     case PROP_RESTRICT_TO_FILL_LEVEL:
 668       g_value_set_boolean (value, gtk_range_get_restrict_to_fill_level (range));
 669       break;
 670     case PROP_FILL_LEVEL:
 671       g_value_set_double (value, gtk_range_get_fill_level (range));
 672       break;
 673     default:
 674       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 675       break;
 676     }
 677 }
 678
 679 static void
 680 gtk_range_init (GtkRange *range)
 681 {
 682   GtkRangePrivate *priv;
 683
 684   range->priv = G_TYPE_INSTANCE_GET_PRIVATE (range,
 685                                              GTK_TYPE_RANGE,
 686                                              GtkRangePrivate);
 687   priv = range->priv;
 688
 689   gtk_widget_set_has_window (GTK_WIDGET (range), FALSE);
 690
 691   priv->orientation = GTK_ORIENTATION_HORIZONTAL;
 692   priv->adjustment = NULL;
 693   priv->inverted = FALSE;
 694   priv->flippable = FALSE;
 695   priv->min_slider_size = 1;
 696   priv->has_stepper_a = FALSE;
 697   priv->has_stepper_b = FALSE;
 698   priv->has_stepper_c = FALSE;
 699   priv->has_stepper_d = FALSE;
 700   priv->need_recalc = TRUE;
 701   priv->round_digits = -1;
 702   priv->mouse_location = MOUSE_OUTSIDE;
 703   priv->mouse_x = -1;
 704   priv->mouse_y = -1;
 705   priv->grab_location = MOUSE_OUTSIDE;
 706   priv->grab_button = 0;
 707   priv->lower_sensitivity = GTK_SENSITIVITY_AUTO;
 708   priv->upper_sensitivity = GTK_SENSITIVITY_AUTO;
 709   priv->lower_sensitive = TRUE;
 710   priv->upper_sensitive = TRUE;
 711   priv->show_fill_level = FALSE;
 712   priv->restrict_to_fill_level = TRUE;
 713   priv->fill_level = G_MAXDOUBLE;
 714   priv->timer = NULL;
 715 }
 716
 717 /**
 718  * gtk_range_get_adjustment:
 719  * @range: a #GtkRange
 720  *
 721  * Get the #GtkAdjustment which is the "model" object for #GtkRange.
 722  * See gtk_range_set_adjustment() for details.
 723  * The return value does not have a reference added, so should not
 724  * be unreferenced.
 725  *
 726  * Return value: (transfer none): a #GtkAdjustment
 727  **/
 728 GtkAdjustment*
 729 gtk_range_get_adjustment (GtkRange *range)
 730 {
 731   GtkRangePrivate *priv;
 732
 733   g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
 734
 735   priv = range->priv;
 736
 737   if (!priv->adjustment)
 738     gtk_range_set_adjustment (range, NULL);
 739
 740   return priv->adjustment;
 741 }
 742
 743 /**
 744  * gtk_range_set_adjustment:
 745  * @range: a #GtkRange
 746  * @adjustment: a #GtkAdjustment
 747  *
 748  * Sets the adjustment to be used as the "model" object for this range
 749  * widget. The adjustment indicates the current range value, the
 750  * minimum and maximum range values, the step/page increments used
 751  * for keybindings and scrolling, and the page size. The page size
 752  * is normally 0 for #GtkScale and nonzero for #GtkScrollbar, and
 753  * indicates the size of the visible area of the widget being scrolled.
 754  * The page size affects the size of the scrollbar slider.
 755  **/
 756 void
 757 gtk_range_set_adjustment (GtkRange      *range,
 758                           GtkAdjustment *adjustment)
 759 {
 760   GtkRangePrivate *priv;
 761
 762   g_return_if_fail (GTK_IS_RANGE (range));
 763
 764   priv = range->priv;
 765
 766   if (!adjustment)
 767     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 768   else
 769     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 770
 771   if (priv->adjustment != adjustment)
 772     {
 773       if (priv->adjustment)
 774         {
 775           g_signal_handlers_disconnect_by_func (priv->adjustment,
 776                                                 gtk_range_adjustment_changed,
 777                                                 range);
 778           g_signal_handlers_disconnect_by_func (priv->adjustment,
 779                                                 gtk_range_adjustment_value_changed,
 780                                                 range);
 781           g_object_unref (priv->adjustment);
 782         }
 783
 784       priv->adjustment = adjustment;
 785       g_object_ref_sink (adjustment);
 786
 787       g_signal_connect (adjustment, "changed",
 788                         G_CALLBACK (gtk_range_adjustment_changed),
 789                         range);
 790       g_signal_connect (adjustment, "value-changed",
 791                         G_CALLBACK (gtk_range_adjustment_value_changed),
 792                         range);
 793
 794       gtk_range_adjustment_changed (adjustment, range);
 795       g_object_notify (G_OBJECT (range), "adjustment");
 796     }
 797 }
 798
 799 /**
 800  * gtk_range_set_inverted:
 801  * @range: a #GtkRange
 802  * @setting: %TRUE to invert the range
 803  *
 804  * Ranges normally move from lower to higher values as the
 805  * slider moves from top to bottom or left to right. Inverted
 806  * ranges have higher values at the top or on the right rather than
 807  * on the bottom or left.
 808  **/
 809 void
 810 gtk_range_set_inverted (GtkRange *range,
 811                         gboolean  setting)
 812 {
 813   GtkRangePrivate *priv;
 814
 815   g_return_if_fail (GTK_IS_RANGE (range));
 816
 817   priv = range->priv;
 818
 819   setting = setting != FALSE;
 820
 821   if (setting != priv->inverted)
 822     {
 823       priv->inverted = setting;
 824       g_object_notify (G_OBJECT (range), "inverted");
 825       gtk_widget_queue_resize (GTK_WIDGET (range));
 826     }
 827 }
 828
 829 /**
 830  * gtk_range_get_inverted:
 831  * @range: a #GtkRange
 832  *
 833  * Gets the value set by gtk_range_set_inverted().
 834  *
 835  * Return value: %TRUE if the range is inverted
 836  **/
 837 gboolean
 838 gtk_range_get_inverted (GtkRange *range)
 839 {
 840   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 841
 842   return range->priv->inverted;
 843 }
 844
 845 /**
 846  * gtk_range_set_flippable:
 847  * @range: a #GtkRange
 848  * @flippable: %TRUE to make the range flippable
 849  *
 850  * If a range is flippable, it will switch its direction if it is
 851  * horizontal and its direction is %GTK_TEXT_DIR_RTL.
 852  *
 853  * See gtk_widget_get_direction().
 854  *
 855  * Since: 2.18
 856  **/
 857 void
 858 gtk_range_set_flippable (GtkRange *range,
 859                          gboolean  flippable)
 860 {
 861   GtkRangePrivate *priv;
 862
 863   g_return_if_fail (GTK_IS_RANGE (range));
 864
 865   priv = range->priv;
 866
 867   flippable = flippable ? TRUE : FALSE;
 868
 869   if (flippable != priv->flippable)
 870     {
 871       priv->flippable = flippable;
 872
 873       gtk_widget_queue_draw (GTK_WIDGET (range));
 874     }
 875 }
 876
 877 /**
 878  * gtk_range_get_flippable:
 879  * @range: a #GtkRange
 880  *
 881  * Gets the value set by gtk_range_set_flippable().
 882  *
 883  * Return value: %TRUE if the range is flippable
 884  *
 885  * Since: 2.18
 886  **/
 887 gboolean
 888 gtk_range_get_flippable (GtkRange *range)
 889 {
 890   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 891
 892   return range->priv->flippable;
 893 }
 894
 895 /**
 896  * gtk_range_set_slider_size_fixed:
 897  * @range: a #GtkRange
 898  * @size_fixed: %TRUE to make the slider size constant
 899  *
 900  * Sets whether the range's slider has a fixed size, or a size that
 901  * depends on it's adjustment's page size.
 902  *
 903  * This function is useful mainly for #GtkRange subclasses.
 904  *
 905  * Since: 2.20
 906  **/
 907 void
 908 gtk_range_set_slider_size_fixed (GtkRange *range,
 909                                  gboolean  size_fixed)
 910 {
 911   GtkRangePrivate *priv;
 912
 913   g_return_if_fail (GTK_IS_RANGE (range));
 914
 915   priv = range->priv;
 916
 917   if (size_fixed != priv->slider_size_fixed)
 918     {
 919       priv->slider_size_fixed = size_fixed ? TRUE : FALSE;
 920
 921       if (priv->adjustment && gtk_widget_get_mapped (GTK_WIDGET (range)))
 922         {
 923           priv->need_recalc = TRUE;
 924           gtk_range_calc_layout (range, gtk_adjustment_get_value (priv->adjustment));
 925           gtk_widget_queue_draw (GTK_WIDGET (range));
 926         }
 927     }
 928 }
 929
 930 /**
 931  * gtk_range_get_slider_size_fixed:
 932  * @range: a #GtkRange
 933  *
 934  * This function is useful mainly for #GtkRange subclasses.
 935  *
 936  * See gtk_range_set_slider_size_fixed().
 937  *
 938  * Return value: whether the range's slider has a fixed size.
 939  *
 940  * Since: 2.20
 941  **/
 942 gboolean
 943 gtk_range_get_slider_size_fixed (GtkRange *range)
 944 {
 945   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
 946
 947   return range->priv->slider_size_fixed;
 948 }
 949
 950 /**
 951  * gtk_range_set_min_slider_size:
 952  * @range: a #GtkRange
 953  * @min_size: The slider's minimum size
 954  *
 955  * Sets the minimum size of the range's slider.
 956  *
 957  * This function is useful mainly for #GtkRange subclasses.
 958  *
 959  * Since: 2.20
 960  **/
 961 void
 962 gtk_range_set_min_slider_size (GtkRange *range,
 963                                gint      min_size)
 964 {
 965   GtkRangePrivate *priv;
 966
 967   g_return_if_fail (GTK_IS_RANGE (range));
 968   g_return_if_fail (min_size > 0);
 969
 970   priv = range->priv;
 971
 972   if (min_size != priv->min_slider_size)
 973     {
 974       priv->min_slider_size = min_size;
 975
 976       if (gtk_widget_is_drawable (GTK_WIDGET (range)))
 977         {
 978           priv->need_recalc = TRUE;
 979           gtk_range_calc_layout (range, priv->adjustment->value);
 980           gtk_widget_queue_draw (GTK_WIDGET (range));
 981         }
 982     }
 983 }
 984
 985 /**
 986  * gtk_range_get_min_slider_size:
 987  * @range: a #GtkRange
 988  *
 989  * This function is useful mainly for #GtkRange subclasses.
 990  *
 991  * See gtk_range_set_min_slider_size().
 992  *
 993  * Return value: The minimum size of the range's slider.
 994  *
 995  * Since: 2.20
 996  **/
 997 gint
 998 gtk_range_get_min_slider_size (GtkRange *range)
 999 {
1000   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1001
1002   return range->priv->min_slider_size;
1003 }
1004
1005 /**
1006  * gtk_range_get_range_rect:
1007  * @range: a #GtkRange
1008  * @range_rect: return location for the range rectangle
1009  *
1010  * This function returns the area that contains the range's trough
1011  * and its steppers, in widget->window coordinates.
1012  *
1013  * This function is useful mainly for #GtkRange subclasses.
1014  *
1015  * Since: 2.20
1016  **/
1017 void
1018 gtk_range_get_range_rect (GtkRange     *range,
1019                           GdkRectangle *range_rect)
1020 {
1021   GtkRangePrivate *priv;
1022
1023   g_return_if_fail (GTK_IS_RANGE (range));
1024   g_return_if_fail (range_rect != NULL);
1025
1026   priv = range->priv;
1027
1028   gtk_range_calc_layout (range, priv->adjustment->value);
1029
1030   *range_rect = priv->range_rect;
1031 }
1032
1033 /**
1034  * gtk_range_get_slider_range:
1035  * @range: a #GtkRange
1036  * @slider_start: (allow-none): return location for the slider's start, or %NULL
1037  * @slider_end: (allow-none): return location for the slider's end, or %NULL
1038  *
1039  * This function returns sliders range along the long dimension,
1040  * in widget->window coordinates.
1041  *
1042  * This function is useful mainly for #GtkRange subclasses.
1043  *
1044  * Since: 2.20
1045  **/
1046 void
1047 gtk_range_get_slider_range (GtkRange *range,
1048                             gint     *slider_start,
1049                             gint     *slider_end)
1050 {
1051   GtkRangePrivate *priv;
1052
1053   g_return_if_fail (GTK_IS_RANGE (range));
1054
1055   priv = range->priv;
1056
1057   gtk_range_calc_layout (range, priv->adjustment->value);
1058
1059   if (slider_start)
1060     *slider_start = priv->slider_start;
1061
1062   if (slider_end)
1063     *slider_end = priv->slider_end;
1064 }
1065
1066 /**
1067  * gtk_range_set_lower_stepper_sensitivity:
1068  * @range:       a #GtkRange
1069  * @sensitivity: the lower stepper's sensitivity policy.
1070  *
1071  * Sets the sensitivity policy for the stepper that points to the
1072  * 'lower' end of the GtkRange's adjustment.
1073  *
1074  * Since: 2.10
1075  **/
1076 void
1077 gtk_range_set_lower_stepper_sensitivity (GtkRange           *range,
1078                                          GtkSensitivityType  sensitivity)
1079 {
1080   GtkRangePrivate *priv;
1081
1082   g_return_if_fail (GTK_IS_RANGE (range));
1083
1084   priv = range->priv;
1085
1086   if (priv->lower_sensitivity != sensitivity)
1087     {
1088       priv->lower_sensitivity = sensitivity;
1089
1090       priv->need_recalc = TRUE;
1091       gtk_range_calc_layout (range, priv->adjustment->value);
1092       gtk_widget_queue_draw (GTK_WIDGET (range));
1093
1094       g_object_notify (G_OBJECT (range), "lower-stepper-sensitivity");
1095     }
1096 }
1097
1098 /**
1099  * gtk_range_get_lower_stepper_sensitivity:
1100  * @range: a #GtkRange
1101  *
1102  * Gets the sensitivity policy for the stepper that points to the
1103  * 'lower' end of the GtkRange's adjustment.
1104  *
1105  * Return value: The lower stepper's sensitivity policy.
1106  *
1107  * Since: 2.10
1108  **/
1109 GtkSensitivityType
1110 gtk_range_get_lower_stepper_sensitivity (GtkRange *range)
1111 {
1112   g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
1113
1114   return range->priv->lower_sensitivity;
1115 }
1116
1117 /**
1118  * gtk_range_set_upper_stepper_sensitivity:
1119  * @range:       a #GtkRange
1120  * @sensitivity: the upper stepper's sensitivity policy.
1121  *
1122  * Sets the sensitivity policy for the stepper that points to the
1123  * 'upper' end of the GtkRange's adjustment.
1124  *
1125  * Since: 2.10
1126  **/
1127 void
1128 gtk_range_set_upper_stepper_sensitivity (GtkRange           *range,
1129                                          GtkSensitivityType  sensitivity)
1130 {
1131   GtkRangePrivate *priv;
1132
1133   g_return_if_fail (GTK_IS_RANGE (range));
1134
1135   priv = range->priv;
1136
1137   if (priv->upper_sensitivity != sensitivity)
1138     {
1139       priv->upper_sensitivity = sensitivity;
1140
1141       priv->need_recalc = TRUE;
1142       gtk_range_calc_layout (range, priv->adjustment->value);
1143       gtk_widget_queue_draw (GTK_WIDGET (range));
1144
1145       g_object_notify (G_OBJECT (range), "upper-stepper-sensitivity");
1146     }
1147 }
1148
1149 /**
1150  * gtk_range_get_upper_stepper_sensitivity:
1151  * @range: a #GtkRange
1152  *
1153  * Gets the sensitivity policy for the stepper that points to the
1154  * 'upper' end of the GtkRange's adjustment.
1155  *
1156  * Return value: The upper stepper's sensitivity policy.
1157  *
1158  * Since: 2.10
1159  **/
1160 GtkSensitivityType
1161 gtk_range_get_upper_stepper_sensitivity (GtkRange *range)
1162 {
1163   g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
1164
1165   return range->priv->upper_sensitivity;
1166 }
1167
1168 /**
1169  * gtk_range_set_increments:
1170  * @range: a #GtkRange
1171  * @step: step size
1172  * @page: page size
1173  *
1174  * Sets the step and page sizes for the range.
1175  * The step size is used when the user clicks the #GtkScrollbar
1176  * arrows or moves #GtkScale via arrow keys. The page size
1177  * is used for example when moving via Page Up or Page Down keys.
1178  **/
1179 void
1180 gtk_range_set_increments (GtkRange *range,
1181                           gdouble   step,
1182                           gdouble   page)
1183 {
1184   GtkRangePrivate *priv;
1185
1186   g_return_if_fail (GTK_IS_RANGE (range));
1187
1188   priv = range->priv;
1189
1190   priv->adjustment->step_increment = step;
1191   priv->adjustment->page_increment = page;
1192
1193   gtk_adjustment_changed (priv->adjustment);
1194 }
1195
1196 /**
1197  * gtk_range_set_range:
1198  * @range: a #GtkRange
1199  * @min: minimum range value
1200  * @max: maximum range value
1201  *
1202  * Sets the allowable values in the #GtkRange, and clamps the range
1203  * value to be between @min and @max. (If the range has a non-zero
1204  * page size, it is clamped between @min and @max - page-size.)
1205  **/
1206 void
1207 gtk_range_set_range (GtkRange *range,
1208                      gdouble   min,
1209                      gdouble   max)
1210 {
1211   GtkRangePrivate *priv;
1212   gdouble value;
1213
1214   g_return_if_fail (GTK_IS_RANGE (range));
1215   g_return_if_fail (min <= max);
1216
1217   priv = range->priv;
1218
1219   priv->adjustment->lower = min;
1220   priv->adjustment->upper = max;
1221
1222   value = priv->adjustment->value;
1223
1224   if (priv->restrict_to_fill_level)
1225     value = MIN (value, MAX (priv->adjustment->lower,
1226                              priv->fill_level));
1227
1228   gtk_adjustment_set_value (priv->adjustment, value);
1229   gtk_adjustment_changed (priv->adjustment);
1230 }
1231
1232 /**
1233  * gtk_range_set_value:
1234  * @range: a #GtkRange
1235  * @value: new value of the range
1236  *
1237  * Sets the current value of the range; if the value is outside the
1238  * minimum or maximum range values, it will be clamped to fit inside
1239  * them. The range emits the #GtkRange::value-changed signal if the
1240  * value changes.
1241  **/
1242 void
1243 gtk_range_set_value (GtkRange *range,
1244                      gdouble   value)
1245 {
1246   GtkRangePrivate *priv;
1247
1248   g_return_if_fail (GTK_IS_RANGE (range));
1249
1250   priv = range->priv;
1251
1252   if (priv->restrict_to_fill_level)
1253     value = MIN (value, MAX (priv->adjustment->lower,
1254                              priv->fill_level));
1255
1256   gtk_adjustment_set_value (priv->adjustment, value);
1257 }
1258
1259 /**
1260  * gtk_range_get_value:
1261  * @range: a #GtkRange
1262  *
1263  * Gets the current value of the range.
1264  *
1265  * Return value: current value of the range.
1266  **/
1267 gdouble
1268 gtk_range_get_value (GtkRange *range)
1269 {
1270   g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
1271
1272   return range->priv->adjustment->value;
1273 }
1274
1275 /**
1276  * gtk_range_set_show_fill_level:
1277  * @range:           A #GtkRange
1278  * @show_fill_level: Whether a fill level indicator graphics is shown.
1279  *
1280  * Sets whether a graphical fill level is show on the trough. See
1281  * gtk_range_set_fill_level() for a general description of the fill
1282  * level concept.
1283  *
1284  * Since: 2.12
1285  **/
1286 void
1287 gtk_range_set_show_fill_level (GtkRange *range,
1288                                gboolean  show_fill_level)
1289 {
1290   GtkRangePrivate *priv;
1291
1292   g_return_if_fail (GTK_IS_RANGE (range));
1293
1294   priv = range->priv;
1295
1296   show_fill_level = show_fill_level ? TRUE : FALSE;
1297
1298   if (show_fill_level != priv->show_fill_level)
1299     {
1300       priv->show_fill_level = show_fill_level;
1301       g_object_notify (G_OBJECT (range), "show-fill-level");
1302       gtk_widget_queue_draw (GTK_WIDGET (range));
1303     }
1304 }
1305
1306 /**
1307  * gtk_range_get_show_fill_level:
1308  * @range: A #GtkRange
1309  *
1310  * Gets whether the range displays the fill level graphically.
1311  *
1312  * Return value: %TRUE if @range shows the fill level.
1313  *
1314  * Since: 2.12
1315  **/
1316 gboolean
1317 gtk_range_get_show_fill_level (GtkRange *range)
1318 {
1319   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1320
1321   return range->priv->show_fill_level;
1322 }
1323
1324 /**
1325  * gtk_range_set_restrict_to_fill_level:
1326  * @range:                  A #GtkRange
1327  * @restrict_to_fill_level: Whether the fill level restricts slider movement.
1328  *
1329  * Sets whether the slider is restricted to the fill level. See
1330  * gtk_range_set_fill_level() for a general description of the fill
1331  * level concept.
1332  *
1333  * Since: 2.12
1334  **/
1335 void
1336 gtk_range_set_restrict_to_fill_level (GtkRange *range,
1337                                       gboolean  restrict_to_fill_level)
1338 {
1339   GtkRangePrivate *priv;
1340
1341   g_return_if_fail (GTK_IS_RANGE (range));
1342
1343   priv = range->priv;
1344
1345   restrict_to_fill_level = restrict_to_fill_level ? TRUE : FALSE;
1346
1347   if (restrict_to_fill_level != priv->restrict_to_fill_level)
1348     {
1349       priv->restrict_to_fill_level = restrict_to_fill_level;
1350       g_object_notify (G_OBJECT (range), "restrict-to-fill-level");
1351
1352       gtk_range_set_value (range, gtk_range_get_value (range));
1353     }
1354 }
1355
1356 /**
1357  * gtk_range_get_restrict_to_fill_level:
1358  * @range: A #GtkRange
1359  *
1360  * Gets whether the range is restricted to the fill level.
1361  *
1362  * Return value: %TRUE if @range is restricted to the fill level.
1363  *
1364  * Since: 2.12
1365  **/
1366 gboolean
1367 gtk_range_get_restrict_to_fill_level (GtkRange *range)
1368 {
1369   g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
1370
1371   return range->priv->restrict_to_fill_level;
1372 }
1373
1374 /**
1375  * gtk_range_set_fill_level:
1376  * @range: a #GtkRange
1377  * @fill_level: the new position of the fill level indicator
1378  *
1379  * Set the new position of the fill level indicator.
1380  *
1381  * The "fill level" is probably best described by its most prominent
1382  * use case, which is an indicator for the amount of pre-buffering in
1383  * a streaming media player. In that use case, the value of the range
1384  * would indicate the current play position, and the fill level would
1385  * be the position up to which the file/stream has been downloaded.
1386  *
1387  * This amount of prebuffering can be displayed on the range's trough
1388  * and is themeable separately from the trough. To enable fill level
1389  * display, use gtk_range_set_show_fill_level(). The range defaults
1390  * to not showing the fill level.
1391  *
1392  * Additionally, it's possible to restrict the range's slider position
1393  * to values which are smaller than the fill level. This is controller
1394  * by gtk_range_set_restrict_to_fill_level() and is by default
1395  * enabled.
1396  *
1397  * Since: 2.12
1398  **/
1399 void
1400 gtk_range_set_fill_level (GtkRange *range,
1401                           gdouble   fill_level)
1402 {
1403   GtkRangePrivate *priv;
1404
1405   g_return_if_fail (GTK_IS_RANGE (range));
1406
1407   priv = range->priv;
1408
1409   if (fill_level != priv->fill_level)
1410     {
1411       priv->fill_level = fill_level;
1412       g_object_notify (G_OBJECT (range), "fill-level");
1413
1414       if (priv->show_fill_level)
1415         gtk_widget_queue_draw (GTK_WIDGET (range));
1416
1417       if (priv->restrict_to_fill_level)
1418         gtk_range_set_value (range, gtk_range_get_value (range));
1419     }
1420 }
1421
1422 /**
1423  * gtk_range_get_fill_level:
1424  * @range: A #GtkRange
1425  *
1426  * Gets the current position of the fill level indicator.
1427  *
1428  * Return value: The current fill level
1429  *
1430  * Since: 2.12
1431  **/
1432 gdouble
1433 gtk_range_get_fill_level (GtkRange *range)
1434 {
1435   g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
1436
1437   return range->priv->fill_level;
1438 }
1439
1440 static gboolean
1441 should_invert (GtkRange *range)
1442 {
1443   GtkRangePrivate *priv = range->priv;
1444
1445   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1446     return
1447       (priv->inverted && !priv->flippable) ||
1448       (priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) ||
1449       (!priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
1450   else
1451     return priv->inverted;
1452 }
1453
1454 static void
1455 gtk_range_destroy (GtkWidget *widget)
1456 {
1457   GtkRange *range = GTK_RANGE (widget);
1458   GtkRangePrivate *priv = range->priv;
1459
1460   gtk_range_remove_step_timer (range);
1461
1462   if (priv->repaint_id)
1463     g_source_remove (priv->repaint_id);
1464   priv->repaint_id = 0;
1465
1466   if (priv->adjustment)
1467     {
1468       g_signal_handlers_disconnect_by_func (priv->adjustment,
1469                                             gtk_range_adjustment_changed,
1470                                             range);
1471       g_signal_handlers_disconnect_by_func (priv->adjustment,
1472                                             gtk_range_adjustment_value_changed,
1473                                             range);
1474       g_object_unref (priv->adjustment);
1475       priv->adjustment = NULL;
1476     }
1477
1478   if (priv->n_marks)
1479     {
1480       g_free (priv->marks);
1481       priv->marks = NULL;
1482       g_free (priv->mark_pos);
1483       priv->mark_pos = NULL;
1484       priv->n_marks = 0;
1485     }
1486
1487   GTK_WIDGET_CLASS (gtk_range_parent_class)->destroy (widget);
1488 }
1489
1490 static void
1491 gtk_range_get_preferred_width (GtkWidget *widget,
1492                                gint      *minimum,
1493                                gint      *natural)
1494 {
1495   GtkRange *range;
1496   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
1497   GdkRectangle range_rect;
1498   GtkBorder border;
1499
1500   range = GTK_RANGE (widget);
1501
1502   gtk_range_get_props (range,
1503                        &slider_width, &stepper_size,
1504                        &focus_width, &trough_border,
1505                        &stepper_spacing, NULL,
1506                        NULL, NULL);
1507
1508   gtk_range_calc_request (range,
1509                           slider_width, stepper_size,
1510                           focus_width, trough_border, stepper_spacing,
1511                           &range_rect, &border, NULL, NULL, NULL, NULL);
1512
1513   *minimum = *natural = range_rect.width + border.left + border.right;
1514 }
1515
1516 static void
1517 gtk_range_get_preferred_height (GtkWidget *widget,
1518                                 gint      *minimum,
1519                                 gint      *natural)
1520 {
1521   GtkRange *range;
1522   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
1523   GdkRectangle range_rect;
1524   GtkBorder border;
1525
1526   range = GTK_RANGE (widget);
1527
1528   gtk_range_get_props (range,
1529                        &slider_width, &stepper_size,
1530                        &focus_width, &trough_border,
1531                        &stepper_spacing, NULL,
1532                        NULL, NULL);
1533
1534   gtk_range_calc_request (range,
1535                           slider_width, stepper_size,
1536                           focus_width, trough_border, stepper_spacing,
1537                           &range_rect, &border, NULL, NULL, NULL, NULL);
1538
1539   *minimum = *natural = range_rect.height + border.top + border.bottom;
1540 }
1541
1542 static gboolean
1543 modify_allocation_for_window_grip (GtkWidget     *widget,
1544                                    GtkAllocation *allocation)
1545 {
1546   GtkRange *range = GTK_RANGE (widget);
1547   GtkRangePrivate *priv = range->priv;
1548   GtkWidget *window, *parent;
1549   GdkRectangle grip_rect;
1550   GdkRectangle translated_rect;
1551   gint x;
1552   gint y;
1553
1554   window = gtk_widget_get_toplevel (widget);
1555   if (!GTK_IS_WINDOW (window))
1556     return FALSE;
1557
1558   if (!gtk_window_resize_grip_is_visible (GTK_WINDOW (window)))
1559     return FALSE;
1560
1561   /* Get the area of the window's corner grip */
1562   gtk_window_get_resize_grip_area (GTK_WINDOW (window), &grip_rect);
1563
1564   x = 0;
1565   y = 0;
1566
1567   /* Translate the stepper's area into window coords.
1568    * This is slightly tricky. We can't just use
1569    * gtk_widget_translate_coordinates (widget, window, 0, 0, &x, &y)
1570    * since that translates wrt to the _current_ allocation
1571    * and will lead to alternating between overlap and nonoverlap
1572    * for successive allocations.
1573    * Therefore, we find the window-widget to whose window allocation
1574    * is relative, and translate from there upwards.
1575    */
1576   parent = widget;
1577   while (gtk_widget_get_window (parent) == gtk_widget_get_window (widget) &&
1578          parent != window)
1579     {
1580       parent = gtk_widget_get_parent (parent);
1581     }
1582
1583   if (parent == window)
1584     translated_rect = *allocation;
1585   else
1586     {
1587       gtk_widget_translate_coordinates (gtk_widget_get_parent (widget),
1588                                         window,
1589                                         allocation->x, allocation->y,
1590                                         &x, &y);
1591       translated_rect.x = x;
1592       translated_rect.y = y;
1593       translated_rect.width = allocation->width;
1594       translated_rect.height = allocation->height;
1595     }
1596
1597   /* If the stepper button intersects the window resize grip.. */
1598   if (gdk_rectangle_intersect (&grip_rect, &translated_rect, NULL))
1599     {
1600       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1601         {
1602           allocation->width -= grip_rect.width;
1603           if (gtk_widget_get_direction (window) == GTK_TEXT_DIR_RTL)
1604             allocation->x += grip_rect.width;
1605         }
1606       else
1607         {
1608           allocation->height -= grip_rect.height;
1609         }
1610
1611       return TRUE;
1612     }
1613
1614   return FALSE;
1615 }
1616
1617 static void
1618 gtk_range_size_allocate (GtkWidget     *widget,
1619                          GtkAllocation *allocation)
1620 {
1621   GtkRange *range = GTK_RANGE (widget);
1622   GtkRangePrivate *priv = range->priv;
1623
1624   modify_allocation_for_window_grip (widget, allocation);
1625   gtk_widget_set_allocation (widget, allocation);
1626
1627   priv->recalc_marks = TRUE;
1628
1629   priv->need_recalc = TRUE;
1630   gtk_range_calc_layout (range, priv->adjustment->value);
1631
1632   if (gtk_widget_get_realized (widget))
1633     gdk_window_move_resize (priv->event_window,
1634                             allocation->x, allocation->y,
1635                             allocation->width, allocation->height);
1636 }
1637
1638 static void
1639 resize_grip_visible_changed (GObject    *object,
1640                              GParamSpec *pspec,
1641                              gpointer    user_data)
1642 {
1643   gtk_widget_queue_resize (GTK_WIDGET (user_data));
1644 }
1645
1646 static void
1647 gtk_range_hierarchy_changed (GtkWidget *widget,
1648                              GtkWidget *previous_toplevel)
1649 {
1650   GtkWidget *window;
1651
1652   if (previous_toplevel)
1653     g_signal_handlers_disconnect_by_func (previous_toplevel,
1654                                           G_CALLBACK (resize_grip_visible_changed),
1655                                           widget);
1656   window = gtk_widget_get_toplevel (widget);
1657   if (GTK_IS_WINDOW (window))
1658     g_signal_connect (window, "notify::resize-grip-visible",
1659                       G_CALLBACK (resize_grip_visible_changed), widget);
1660 }
1661
1662 static void
1663 gtk_range_realize (GtkWidget *widget)
1664 {
1665   GtkAllocation allocation;
1666   GtkRange *range = GTK_RANGE (widget);
1667   GtkRangePrivate *priv = range->priv;
1668   GdkWindow *window;
1669   GdkWindowAttr attributes;
1670   gint attributes_mask;
1671
1672   gtk_range_calc_layout (range, priv->adjustment->value);
1673
1674   gtk_widget_set_realized (widget, TRUE);
1675
1676   window = gtk_widget_get_parent_window (widget);
1677   gtk_widget_set_window (widget, window);
1678   g_object_ref (window);
1679
1680   gtk_widget_get_allocation (widget, &allocation);
1681   if (modify_allocation_for_window_grip (widget, &allocation))
1682     gtk_widget_set_allocation (widget, &allocation);
1683
1684   attributes.window_type = GDK_WINDOW_CHILD;
1685   attributes.x = allocation.x;
1686   attributes.y = allocation.y;
1687   attributes.width = allocation.width;
1688   attributes.height = allocation.height;
1689   attributes.wclass = GDK_INPUT_ONLY;
1690   attributes.event_mask = gtk_widget_get_events (widget);
1691   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
1692                             GDK_BUTTON_RELEASE_MASK |
1693                             GDK_ENTER_NOTIFY_MASK |
1694                             GDK_LEAVE_NOTIFY_MASK |
1695                             GDK_POINTER_MOTION_MASK |
1696                             GDK_POINTER_MOTION_HINT_MASK);
1697
1698   attributes_mask = GDK_WA_X | GDK_WA_Y;
1699
1700   priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
1701                                         &attributes, attributes_mask);
1702   gdk_window_set_user_data (priv->event_window, range);
1703 }
1704
1705 static void
1706 gtk_range_unrealize (GtkWidget *widget)
1707 {
1708   GtkRange *range = GTK_RANGE (widget);
1709   GtkRangePrivate *priv = range->priv;
1710
1711   gtk_range_remove_step_timer (range);
1712
1713   gdk_window_set_user_data (priv->event_window, NULL);
1714   gdk_window_destroy (priv->event_window);
1715   priv->event_window = NULL;
1716
1717   GTK_WIDGET_CLASS (gtk_range_parent_class)->unrealize (widget);
1718 }
1719
1720 static void
1721 gtk_range_map (GtkWidget *widget)
1722 {
1723   GtkRange *range = GTK_RANGE (widget);
1724   GtkRangePrivate *priv = range->priv;
1725
1726   gdk_window_show (priv->event_window);
1727
1728   GTK_WIDGET_CLASS (gtk_range_parent_class)->map (widget);
1729 }
1730
1731 static void
1732 gtk_range_unmap (GtkWidget *widget)
1733 {
1734   GtkRange *range = GTK_RANGE (widget);
1735   GtkRangePrivate *priv = range->priv;
1736
1737   stop_scrolling (range);
1738
1739   gdk_window_hide (priv->event_window);
1740
1741   GTK_WIDGET_CLASS (gtk_range_parent_class)->unmap (widget);
1742 }
1743
1744 static void
1745 _gtk_range_update_context_for_stepper (GtkRange        *range,
1746                                        GtkStyleContext *context,
1747                                        Stepper          stepper)
1748 {
1749   GtkRangePrivate *priv = range->priv;
1750   GtkJunctionSides sides = 0;
1751   gboolean vertical, is_rtl;
1752
1753   vertical = (priv->orientation == GTK_ORIENTATION_VERTICAL);
1754   is_rtl = (gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
1755
1756   /* Take junction sides from what's been
1757    * previously set to the widget itself
1758    */
1759   sides = gtk_style_context_get_junction_sides (context);
1760
1761   if (vertical)
1762     sides &= ~(GTK_JUNCTION_TOP | GTK_JUNCTION_BOTTOM);
1763   else
1764     sides &= ~(GTK_JUNCTION_LEFT | GTK_JUNCTION_RIGHT);
1765
1766   switch (stepper)
1767     {
1768     case STEPPER_A:
1769       if (vertical)
1770         sides |= GTK_JUNCTION_BOTTOM;
1771       else
1772         sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1773       break;
1774     case STEPPER_B:
1775       if (priv->has_stepper_a)
1776         {
1777           if (vertical)
1778             sides |= GTK_JUNCTION_TOP;
1779           else
1780             sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1781         }
1782
1783       if (vertical)
1784         sides |= GTK_JUNCTION_BOTTOM;
1785       else
1786         sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1787       break;
1788     case STEPPER_C:
1789       if (priv->has_stepper_d)
1790         {
1791           if (vertical)
1792             sides |= GTK_JUNCTION_BOTTOM;
1793           else
1794             sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
1795         }
1796
1797       if (vertical)
1798         sides |= GTK_JUNCTION_TOP;
1799       else
1800         sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1801       break;
1802     case STEPPER_D:
1803       if (vertical)
1804         sides |= GTK_JUNCTION_TOP;
1805       else
1806         sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
1807       break;
1808     }
1809
1810   gtk_style_context_set_junction_sides (context, sides);
1811   gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
1812 }
1813
1814 static void
1815 draw_stepper (GtkRange     *range,
1816               Stepper       stepper,
1817               cairo_t      *cr,
1818               GtkArrowType  arrow_type,
1819               gboolean      clicked,
1820               gboolean      prelighted)
1821 {
1822   GtkRangePrivate *priv = range->priv;
1823   GtkAllocation allocation;
1824   GtkStateFlags state = 0;
1825   GtkStyleContext *context;
1826   GtkWidget *widget = GTK_WIDGET (range);
1827   GdkWindow *window;
1828   gfloat arrow_scaling;
1829   GdkRectangle *rect;
1830   gint arrow_x;
1831   gint arrow_y;
1832   gdouble arrow_size, angle;
1833   gboolean arrow_sensitive;
1834
1835   switch (stepper)
1836     {
1837     case STEPPER_A:
1838       rect = &priv->stepper_a;
1839       break;
1840     case STEPPER_B:
1841       rect = &priv->stepper_b;
1842       break;
1843     case STEPPER_C:
1844       rect = &priv->stepper_c;
1845       break;
1846     case STEPPER_D:
1847       rect = &priv->stepper_d;
1848       break;
1849     default:
1850       g_assert_not_reached ();
1851     };
1852
1853   arrow_sensitive = TRUE;
1854
1855   gtk_widget_get_allocation (widget, &allocation);
1856
1857   if ((!priv->inverted && (arrow_type == GTK_ARROW_DOWN ||
1858                             arrow_type == GTK_ARROW_RIGHT)) ||
1859       (priv->inverted  && (arrow_type == GTK_ARROW_UP ||
1860                             arrow_type == GTK_ARROW_LEFT)))
1861     {
1862       arrow_sensitive = priv->upper_sensitive;
1863     }
1864   else
1865     {
1866       arrow_sensitive = priv->lower_sensitive;
1867     }
1868
1869   if (!gtk_widget_is_sensitive (GTK_WIDGET (range)) || !arrow_sensitive)
1870     state = GTK_STATE_FLAG_INSENSITIVE;
1871   else
1872     {
1873       if (clicked)
1874         state |= GTK_STATE_FLAG_ACTIVE;
1875       if (prelighted)
1876         state |= GTK_STATE_FLAG_PRELIGHT;
1877     }
1878
1879   window = gtk_widget_get_window (widget);
1880   context = gtk_widget_get_style_context (widget);
1881
1882   gtk_style_context_save (context);
1883   _gtk_range_update_context_for_stepper (range, context, stepper);
1884   gtk_style_context_set_state (context, state);
1885
1886   gtk_render_background (context, cr,
1887                          rect->x, rect->y,
1888                          rect->width, rect->height);
1889   gtk_render_frame (context, cr,
1890                     rect->x, rect->y,
1891                     rect->width, rect->height);
1892
1893   gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
1894
1895   arrow_size = MIN (rect->width, rect->height) * arrow_scaling;
1896   arrow_x = rect->x + (rect->width - arrow_size) / 2;
1897   arrow_y = rect->y + (rect->height - arrow_size) / 2;
1898
1899   if (clicked && arrow_sensitive)
1900     {
1901       gint arrow_displacement_x;
1902       gint arrow_displacement_y;
1903
1904       gtk_range_get_props (GTK_RANGE (widget),
1905                            NULL, NULL, NULL, NULL, NULL, NULL,
1906                            &arrow_displacement_x, &arrow_displacement_y);
1907
1908       arrow_x += arrow_displacement_x;
1909       arrow_y += arrow_displacement_y;
1910     }
1911
1912   switch (arrow_type)
1913     {
1914     case GTK_ARROW_RIGHT:
1915       angle = G_PI / 2;
1916       break;
1917     case GTK_ARROW_DOWN:
1918       angle = G_PI;
1919       break;
1920     case GTK_ARROW_LEFT:
1921       angle = 3 * (G_PI / 2);
1922       break;
1923     case GTK_ARROW_UP:
1924     default:
1925       angle = 0;
1926       break;
1927     }
1928
1929   gtk_render_arrow (context, cr,
1930                     angle,
1931                     arrow_x, arrow_y,
1932                     arrow_size);
1933
1934   gtk_style_context_restore (context);
1935 }
1936
1937 static gboolean
1938 gtk_range_draw (GtkWidget      *widget,
1939                 cairo_t        *cr)
1940 {
1941   GtkRange *range = GTK_RANGE (widget);
1942   GtkRangePrivate *priv = range->priv;
1943   gboolean sensitive;
1944   GtkStateFlags state = 0;
1945   GdkWindow *window;
1946   gint focus_line_width = 0;
1947   gint focus_padding = 0;
1948   gboolean touchscreen;
1949   gboolean draw_trough = TRUE;
1950   GtkStyleContext *context;
1951
1952   context = gtk_widget_get_style_context (widget);
1953   g_object_get (gtk_widget_get_settings (widget),
1954                 "gtk-touchscreen-mode", &touchscreen,
1955                 NULL);
1956
1957   if (GTK_IS_SCALE (widget) &&
1958       priv->adjustment->upper == priv->adjustment->lower)
1959     draw_trough = FALSE;
1960
1961   if (gtk_widget_get_can_focus (GTK_WIDGET (range)))
1962     gtk_widget_style_get (GTK_WIDGET (range),
1963                           "focus-line-width", &focus_line_width,
1964                           "focus-padding", &focus_padding,
1965                           NULL);
1966
1967   window = gtk_widget_get_window (widget);
1968
1969   /* we're now exposing, so there's no need to force early repaints */
1970   if (priv->repaint_id)
1971     g_source_remove (priv->repaint_id);
1972   priv->repaint_id = 0;
1973
1974   gtk_range_calc_marks (range);
1975   gtk_range_calc_layout (range, priv->adjustment->value);
1976
1977   sensitive = gtk_widget_is_sensitive (widget);
1978
1979   /* Just to be confusing, we draw the trough for the whole
1980    * range rectangle, not the trough rectangle (the trough
1981    * rectangle is just for hit detection)
1982    */
1983   cairo_save (cr);
1984   gdk_cairo_rectangle (cr, &priv->range_rect);
1985   cairo_clip (cr);
1986
1987     {
1988       gint     x      = (priv->range_rect.x +
1989                          focus_line_width + focus_padding);
1990       gint     y      = (priv->range_rect.y +
1991                          focus_line_width + focus_padding);
1992       gint     width  = (priv->range_rect.width -
1993                          2 * (focus_line_width + focus_padding));
1994       gint     height = (priv->range_rect.height -
1995                          2 * (focus_line_width + focus_padding));
1996       gboolean trough_under_steppers;
1997       gint     stepper_size;
1998       gint     stepper_spacing;
1999
2000       gtk_widget_style_get (GTK_WIDGET (range),
2001                             "trough-under-steppers", &trough_under_steppers,
2002                             "stepper-size",          &stepper_size,
2003                             "stepper-spacing",       &stepper_spacing,
2004                             NULL);
2005
2006       gtk_style_context_save (context);
2007
2008       if (!sensitive)
2009         gtk_style_context_set_state (context, GTK_STATE_FLAG_INSENSITIVE);
2010
2011       if (stepper_spacing > 0)
2012         trough_under_steppers = FALSE;
2013
2014       if (!trough_under_steppers)
2015         {
2016           gint offset  = 0;
2017           gint shorter = 0;
2018
2019           if (priv->has_stepper_a)
2020             offset += stepper_size;
2021
2022           if (priv->has_stepper_b)
2023             offset += stepper_size;
2024
2025           shorter += offset;
2026
2027           if (priv->has_stepper_c)
2028             shorter += stepper_size;
2029
2030           if (priv->has_stepper_d)
2031             shorter += stepper_size;
2032
2033           if (priv->has_stepper_a || priv->has_stepper_b)
2034             {
2035               offset  += stepper_spacing;
2036               shorter += stepper_spacing;
2037             }
2038
2039           if (priv->has_stepper_c || priv->has_stepper_d)
2040             {
2041               shorter += stepper_spacing;
2042             }
2043
2044           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2045             {
2046               x     += offset;
2047               width -= shorter;
2048             }
2049           else
2050             {
2051               y      += offset;
2052               height -= shorter;
2053             }
2054         }
2055
2056       gtk_style_context_save (context);
2057       gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
2058
2059       if (draw_trough)
2060         {
2061           gint trough_change_pos_x = width;
2062           gint trough_change_pos_y = height;
2063
2064           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2065             trough_change_pos_x = (priv->slider.x +
2066                                    priv->slider.width / 2 -
2067                                    x);
2068           else
2069             trough_change_pos_y = (priv->slider.y +
2070                                    priv->slider.height / 2 -
2071                                    y);
2072
2073           /* FIXME: was trough-upper and trough-lower really used,
2074            * in that case, it should still be exposed somehow.
2075            */
2076           gtk_render_background (context, cr, x, y,
2077                                  trough_change_pos_x,
2078                                  trough_change_pos_y);
2079
2080           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2081             trough_change_pos_y = 0;
2082           else
2083             trough_change_pos_x = 0;
2084
2085           gtk_render_background (context, cr,
2086                                  x + trough_change_pos_x, y + trough_change_pos_y,
2087                                  width - trough_change_pos_x,
2088                                  height - trough_change_pos_y);
2089
2090           gtk_render_frame (context, cr,
2091                             x, y, width, height);
2092         }
2093       else
2094         {
2095           gtk_render_background (context, cr,
2096                                  x, y, width, height);
2097           gtk_render_frame (context, cr,
2098                             x, y, width, height);
2099         }
2100
2101       gtk_style_context_restore (context);
2102
2103       if (priv->show_fill_level &&
2104           priv->adjustment->upper - priv->adjustment->page_size -
2105           priv->adjustment->lower != 0)
2106         {
2107           gdouble  fill_level  = priv->fill_level;
2108           gint     fill_x      = x;
2109           gint     fill_y      = y;
2110           gint     fill_width  = width;
2111           gint     fill_height = height;
2112           gchar   *fill_detail;
2113
2114           gtk_style_context_save (context);
2115           gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
2116
2117           fill_level = CLAMP (fill_level, priv->adjustment->lower,
2118                               priv->adjustment->upper -
2119                               priv->adjustment->page_size);
2120
2121           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
2122             {
2123               fill_x     = priv->trough.x;
2124               fill_width = (priv->slider.width +
2125                             (fill_level - priv->adjustment->lower) /
2126                             (priv->adjustment->upper -
2127                              priv->adjustment->lower -
2128                              priv->adjustment->page_size) *
2129                             (priv->trough.width -
2130                              priv->slider.width));
2131
2132               if (should_invert (range))
2133                 fill_x += priv->trough.width - fill_width;
2134             }
2135           else
2136             {
2137               fill_y      = priv->trough.y;
2138               fill_height = (priv->slider.height +
2139                              (fill_level - priv->adjustment->lower) /
2140                              (priv->adjustment->upper -
2141                               priv->adjustment->lower -
2142                               priv->adjustment->page_size) *
2143                              (priv->trough.height -
2144                               priv->slider.height));
2145
2146               if (should_invert (range))
2147                 fill_y += priv->trough.height - fill_height;
2148             }
2149
2150           if (fill_level < priv->adjustment->upper - priv->adjustment->page_size)
2151             fill_detail = "trough-fill-level-full";
2152           else
2153             fill_detail = "trough-fill-level";
2154
2155           gtk_render_activity (context, cr,
2156                                fill_x, fill_y,
2157                                fill_width, fill_height);
2158
2159           gtk_style_context_restore (context);
2160         }
2161
2162       gtk_style_context_restore (context);
2163
2164       if (sensitive && gtk_widget_has_focus (widget))
2165         {
2166           gtk_style_context_save (context);
2167           gtk_style_context_set_state (context,
2168                                        gtk_widget_get_state_flags (widget));
2169
2170           gtk_render_focus (context, cr,
2171                             priv->range_rect.x,
2172                             priv->range_rect.y,
2173                             priv->range_rect.width,
2174                             priv->range_rect.height);
2175
2176           gtk_style_context_restore (context);
2177         }
2178     }
2179
2180   cairo_restore (cr);
2181
2182   if (!sensitive)
2183     state = GTK_STATE_FLAG_INSENSITIVE;
2184   else if (!touchscreen && priv->mouse_location == MOUSE_SLIDER)
2185     state = GTK_STATE_FLAG_PRELIGHT;
2186
2187   if (priv->grab_location == MOUSE_SLIDER)
2188     state |= GTK_STATE_FLAG_ACTIVE;
2189
2190   cairo_save (cr);
2191   gdk_cairo_rectangle (cr, &priv->slider);
2192   cairo_clip (cr);
2193
2194   if (draw_trough)
2195     {
2196       gtk_style_context_save (context);
2197       gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
2198       gtk_style_context_set_state (context, state);
2199
2200       gtk_render_slider (context, cr,
2201                          priv->slider.x,
2202                          priv->slider.y,
2203                          priv->slider.width,
2204                          priv->slider.height,
2205                          priv->orientation);
2206
2207       gtk_style_context_restore (context);
2208     }
2209
2210   cairo_restore (cr);
2211
2212   if (priv->has_stepper_a)
2213     draw_stepper (range, STEPPER_A, cr,
2214                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
2215                   priv->grab_location == MOUSE_STEPPER_A,
2216                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_A);
2217
2218   if (priv->has_stepper_b)
2219     draw_stepper (range, STEPPER_B, cr,
2220                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
2221                   priv->grab_location == MOUSE_STEPPER_B,
2222                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_B);
2223
2224   if (priv->has_stepper_c)
2225     draw_stepper (range, STEPPER_C, cr,
2226                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
2227                   priv->grab_location == MOUSE_STEPPER_C,
2228                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_C);
2229
2230   if (priv->has_stepper_d)
2231     draw_stepper (range, STEPPER_D, cr,
2232                   priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
2233                   priv->grab_location == MOUSE_STEPPER_D,
2234                   !touchscreen && priv->mouse_location == MOUSE_STEPPER_D);
2235
2236   return FALSE;
2237 }
2238
2239 static void
2240 range_grab_add (GtkRange      *range,
2241                 GdkDevice     *device,
2242                 MouseLocation  location,
2243                 gint           button)
2244 {
2245   GtkRangePrivate *priv = range->priv;
2246
2247   if (device == priv->grab_device)
2248     return;
2249
2250   if (priv->grab_device != NULL)
2251     {
2252       g_warning ("GtkRange already had a grab device, releasing device grab");
2253       gtk_device_grab_remove (GTK_WIDGET (range), priv->grab_device);
2254     }
2255
2256   /* we don't actually gdk_grab, since a button is down */
2257   gtk_device_grab_add (GTK_WIDGET (range), device, TRUE);
2258
2259   priv->grab_location = location;
2260   priv->grab_button = button;
2261   priv->grab_device = device;
2262
2263   if (gtk_range_update_mouse_location (range))
2264     gtk_widget_queue_draw (GTK_WIDGET (range));
2265 }
2266
2267 static void
2268 range_grab_remove (GtkRange *range)
2269 {
2270   GtkRangePrivate *priv = range->priv;
2271   MouseLocation location;
2272
2273   if (priv->grab_device)
2274     {
2275       gtk_device_grab_remove (GTK_WIDGET (range),
2276                               priv->grab_device);
2277       priv->grab_device = NULL;
2278     }
2279
2280   location = priv->grab_location;
2281   priv->grab_location = MOUSE_OUTSIDE;
2282   priv->grab_button = 0;
2283
2284   if (gtk_range_update_mouse_location (range) ||
2285       location != MOUSE_OUTSIDE)
2286     gtk_widget_queue_draw (GTK_WIDGET (range));
2287 }
2288
2289 static GtkScrollType
2290 range_get_scroll_for_grab (GtkRange      *range)
2291 {
2292   GtkRangePrivate *priv = range->priv;
2293   gboolean invert;
2294
2295   invert = should_invert (range);
2296   switch (priv->grab_location)
2297     {
2298       /* Backward stepper */
2299     case MOUSE_STEPPER_A:
2300     case MOUSE_STEPPER_C:
2301       switch (priv->grab_button)
2302         {
2303         case 1:
2304           return invert ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
2305           break;
2306         case 2:
2307           return invert ? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_PAGE_BACKWARD;
2308           break;
2309         case 3:
2310           return invert ? GTK_SCROLL_END : GTK_SCROLL_START;
2311           break;
2312         }
2313       break;
2314
2315       /* Forward stepper */
2316     case MOUSE_STEPPER_B:
2317     case MOUSE_STEPPER_D:
2318       switch (priv->grab_button)
2319         {
2320         case 1:
2321           return invert ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
2322           break;
2323         case 2:
2324           return invert ? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_PAGE_FORWARD;
2325           break;
2326         case 3:
2327           return invert ? GTK_SCROLL_START : GTK_SCROLL_END;
2328           break;
2329        }
2330       break;
2331
2332       /* In the trough */
2333     case MOUSE_TROUGH:
2334       {
2335         if (priv->trough_click_forward)
2336           return GTK_SCROLL_PAGE_FORWARD;
2337         else
2338           return GTK_SCROLL_PAGE_BACKWARD;
2339       }
2340       break;
2341
2342     case MOUSE_OUTSIDE:
2343     case MOUSE_SLIDER:
2344     case MOUSE_WIDGET:
2345       break;
2346     }
2347
2348   return GTK_SCROLL_NONE;
2349 }
2350
2351 static gdouble
2352 coord_to_value (GtkRange *range,
2353                 gint      coord)
2354 {
2355   GtkRangePrivate *priv = range->priv;
2356   gdouble frac;
2357   gdouble value;
2358   gint    trough_length;
2359   gint    trough_start;
2360   gint    slider_length;
2361   gint    trough_border;
2362   gint    trough_under_steppers;
2363
2364   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2365     {
2366       trough_length = priv->trough.height;
2367       trough_start  = priv->trough.y;
2368       slider_length = priv->slider.height;
2369     }
2370   else
2371     {
2372       trough_length = priv->trough.width;
2373       trough_start  = priv->trough.x;
2374       slider_length = priv->slider.width;
2375     }
2376
2377   gtk_range_get_props (range, NULL, NULL, NULL, &trough_border, NULL,
2378                        &trough_under_steppers, NULL, NULL);
2379
2380   if (! trough_under_steppers)
2381     {
2382       trough_start += trough_border;
2383       trough_length -= 2 * trough_border;
2384     }
2385
2386   if (trough_length == slider_length)
2387     frac = 1.0;
2388   else
2389     frac = (MAX (0, coord - trough_start) /
2390             (gdouble) (trough_length - slider_length));
2391
2392   if (should_invert (range))
2393     frac = 1.0 - frac;
2394
2395   value = priv->adjustment->lower + frac * (priv->adjustment->upper -
2396                                             priv->adjustment->lower -
2397                                             priv->adjustment->page_size);
2398
2399   return value;
2400 }
2401
2402 static gboolean
2403 gtk_range_key_press (GtkWidget   *widget,
2404                      GdkEventKey *event)
2405 {
2406   GdkDevice *device;
2407   GtkRange *range = GTK_RANGE (widget);
2408   GtkRangePrivate *priv = range->priv;
2409
2410   device = gdk_event_get_device ((GdkEvent *) event);
2411   device = gdk_device_get_associated_device (device);
2412
2413   if (device == priv->grab_device &&
2414       event->keyval == GDK_KEY_Escape &&
2415       priv->grab_location != MOUSE_OUTSIDE)
2416     {
2417       stop_scrolling (range);
2418
2419       update_slider_position (range,
2420                               priv->slide_initial_coordinate,
2421                               priv->slide_initial_coordinate);
2422
2423       return TRUE;
2424     }
2425
2426   return GTK_WIDGET_CLASS (gtk_range_parent_class)->key_press_event (widget, event);
2427 }
2428
2429 static gint
2430 gtk_range_button_press (GtkWidget      *widget,
2431                         GdkEventButton *event)
2432 {
2433   GtkRange *range = GTK_RANGE (widget);
2434   GtkRangePrivate *priv = range->priv;
2435   GdkDevice *device;
2436
2437   if (!gtk_widget_has_focus (widget))
2438     gtk_widget_grab_focus (widget);
2439
2440   /* ignore presses when we're already doing something else. */
2441   if (priv->grab_location != MOUSE_OUTSIDE)
2442     return FALSE;
2443
2444   device = gdk_event_get_device ((GdkEvent *) event);
2445   priv->mouse_x = event->x;
2446   priv->mouse_y = event->y;
2447
2448   if (gtk_range_update_mouse_location (range))
2449     gtk_widget_queue_draw (widget);
2450
2451   if (priv->mouse_location == MOUSE_TROUGH  &&
2452       event->button == 1)
2453     {
2454       /* button 1 steps by page increment, as with button 2 on a stepper
2455        */
2456       GtkScrollType scroll;
2457       gdouble click_value;
2458
2459       click_value = coord_to_value (range,
2460                                     priv->orientation == GTK_ORIENTATION_VERTICAL ?
2461                                     event->y : event->x);
2462
2463       priv->trough_click_forward = click_value > priv->adjustment->value;
2464       range_grab_add (range, device, MOUSE_TROUGH, event->button);
2465
2466       scroll = range_get_scroll_for_grab (range);
2467
2468       gtk_range_add_step_timer (range, scroll);
2469
2470       return TRUE;
2471     }
2472   else if ((priv->mouse_location == MOUSE_STEPPER_A ||
2473             priv->mouse_location == MOUSE_STEPPER_B ||
2474             priv->mouse_location == MOUSE_STEPPER_C ||
2475             priv->mouse_location == MOUSE_STEPPER_D) &&
2476            (event->button == 1 || event->button == 2 || event->button == 3))
2477     {
2478       GtkAllocation allocation;
2479       GdkRectangle *stepper_area;
2480       GtkScrollType scroll;
2481
2482       range_grab_add (range, device, priv->mouse_location, event->button);
2483
2484       gtk_widget_get_allocation (widget, &allocation);
2485       stepper_area = get_area (range, priv->mouse_location);
2486
2487       gtk_widget_queue_draw_area (widget,
2488                                   allocation.x + stepper_area->x,
2489                                   allocation.y + stepper_area->y,
2490                                   stepper_area->width,
2491                                   stepper_area->height);
2492
2493       scroll = range_get_scroll_for_grab (range);
2494       if (scroll != GTK_SCROLL_NONE)
2495         gtk_range_add_step_timer (range, scroll);
2496
2497       return TRUE;
2498     }
2499   else if ((priv->mouse_location == MOUSE_TROUGH &&
2500             event->button == 2) ||
2501            priv->mouse_location == MOUSE_SLIDER)
2502     {
2503       gboolean need_value_update = FALSE;
2504
2505       /* Any button can be used to drag the slider, but you can start
2506        * dragging the slider with a trough click using button 2;
2507        * On button 2 press, we warp the slider to mouse position,
2508        * then begin the slider drag.
2509        */
2510       if (event->button == 2)
2511         {
2512           gdouble slider_low_value, slider_high_value, new_value;
2513
2514           slider_high_value =
2515             coord_to_value (range,
2516                             priv->orientation == GTK_ORIENTATION_VERTICAL ?
2517                             event->y : event->x);
2518           slider_low_value =
2519             coord_to_value (range,
2520                             priv->orientation == GTK_ORIENTATION_VERTICAL ?
2521                             event->y - priv->slider.height :
2522                             event->x - priv->slider.width);
2523
2524           /* compute new value for warped slider */
2525           new_value = slider_low_value + (slider_high_value - slider_low_value) / 2;
2526
2527           /* recalc slider, so we can set slide_initial_slider_position
2528            * properly
2529            */
2530           priv->need_recalc = TRUE;
2531           gtk_range_calc_layout (range, new_value);
2532
2533           /* defer adjustment updates to update_slider_position() in order
2534            * to keep pixel quantisation
2535            */
2536           need_value_update = TRUE;
2537         }
2538
2539       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2540         {
2541           priv->slide_initial_slider_position = priv->slider.y;
2542           priv->slide_initial_coordinate = event->y;
2543         }
2544       else
2545         {
2546           priv->slide_initial_slider_position = priv->slider.x;
2547           priv->slide_initial_coordinate = event->x;
2548         }
2549
2550       range_grab_add (range, device, MOUSE_SLIDER, event->button);
2551
2552       gtk_widget_queue_draw (widget);
2553
2554       if (need_value_update)
2555         update_slider_position (range, event->x, event->y);
2556
2557       return TRUE;
2558     }
2559
2560   return FALSE;
2561 }
2562
2563 /* During a slide, move the slider as required given new mouse position */
2564 static void
2565 update_slider_position (GtkRange *range,
2566                         gint      mouse_x,
2567                         gint      mouse_y)
2568 {
2569   GtkRangePrivate *priv = range->priv;
2570   gint delta;
2571   gint c;
2572   gdouble new_value;
2573   gboolean handled;
2574   gdouble next_value;
2575   gdouble mark_value;
2576   gdouble mark_delta;
2577   gint i;
2578
2579   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
2580     delta = mouse_y - priv->slide_initial_coordinate;
2581   else
2582     delta = mouse_x - priv->slide_initial_coordinate;
2583
2584   c = priv->slide_initial_slider_position + delta;
2585
2586   new_value = coord_to_value (range, c);
2587   next_value = coord_to_value (range, c + 1);
2588   mark_delta = fabs (next_value - new_value);
2589
2590   for (i = 0; i < priv->n_marks; i++)
2591     {
2592       mark_value = priv->marks[i];
2593
2594       if (fabs (priv->adjustment->value - mark_value) < 3 * mark_delta)
2595         {
2596           if (fabs (new_value - mark_value) < (priv->slider_end - priv->slider_start) * 0.5 * mark_delta)
2597             {
2598               new_value = mark_value;
2599               break;
2600             }
2601         }
2602     }
2603
2604   g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value,
2605                  &handled);
2606 }
2607
2608 static void
2609 stop_scrolling (GtkRange *range)
2610 {
2611   range_grab_remove (range);
2612   gtk_range_remove_step_timer (range);
2613 }
2614
2615 static gboolean
2616 gtk_range_grab_broken (GtkWidget          *widget,
2617                        GdkEventGrabBroken *event)
2618 {
2619   GtkRange *range = GTK_RANGE (widget);
2620   GtkRangePrivate *priv = range->priv;
2621   GdkDevice *device;
2622
2623   device = gdk_event_get_device ((GdkEvent *) event);
2624
2625   if (device == priv->grab_device &&
2626       priv->grab_location != MOUSE_OUTSIDE)
2627     {
2628       if (priv->grab_location == MOUSE_SLIDER)
2629         update_slider_position (range, priv->mouse_x, priv->mouse_y);
2630
2631       stop_scrolling (range);
2632
2633       return TRUE;
2634     }
2635
2636   return FALSE;
2637 }
2638
2639 static gint
2640 gtk_range_button_release (GtkWidget      *widget,
2641                           GdkEventButton *event)
2642 {
2643   GtkRange *range = GTK_RANGE (widget);
2644   GtkRangePrivate *priv = range->priv;
2645   GdkDevice *device;
2646
2647   if (event->window == priv->event_window)
2648     {
2649       priv->mouse_x = event->x;
2650       priv->mouse_y = event->y;
2651     }
2652   else
2653     {
2654       gdk_window_get_device_position (priv->event_window,
2655                                       event->device,
2656                                       &priv->mouse_x,
2657                                       &priv->mouse_y,
2658                                       NULL);
2659     }
2660
2661   device = gdk_event_get_device ((GdkEvent *) event);
2662
2663   if (priv->grab_device == device &&
2664       priv->grab_button == event->button)
2665     {
2666       if (priv->grab_location == MOUSE_SLIDER)
2667         update_slider_position (range, priv->mouse_x, priv->mouse_y);
2668
2669       stop_scrolling (range);
2670
2671       return TRUE;
2672     }
2673
2674   return FALSE;
2675 }
2676
2677 /**
2678  * _gtk_range_get_wheel_delta:
2679  * @range: a #GtkRange
2680  * @direction: A #GdkScrollDirection
2681  *
2682  * Returns a good step value for the mouse wheel.
2683  *
2684  * Return value: A good step value for the mouse wheel.
2685  *
2686  * Since: 2.4
2687  **/
2688 gdouble
2689 _gtk_range_get_wheel_delta (GtkRange           *range,
2690                             GdkScrollDirection  direction)
2691 {
2692   GtkRangePrivate *priv = range->priv;
2693   GtkAdjustment *adj = priv->adjustment;
2694   gdouble delta;
2695
2696   if (GTK_IS_SCROLLBAR (range))
2697     delta = pow (adj->page_size, 2.0 / 3.0);
2698   else
2699     delta = adj->step_increment * 2;
2700
2701   if (direction == GDK_SCROLL_UP ||
2702       direction == GDK_SCROLL_LEFT)
2703     delta = - delta;
2704
2705   if (priv->inverted)
2706     delta = - delta;
2707
2708   return delta;
2709 }
2710
2711 static gboolean
2712 gtk_range_scroll_event (GtkWidget      *widget,
2713                         GdkEventScroll *event)
2714 {
2715   GtkRange *range = GTK_RANGE (widget);
2716   GtkRangePrivate *priv = range->priv;
2717
2718   if (gtk_widget_get_realized (widget))
2719     {
2720       GtkAdjustment *adj = priv->adjustment;
2721       gdouble delta;
2722       gboolean handled;
2723
2724       delta = _gtk_range_get_wheel_delta (range, event->direction);
2725
2726       g_signal_emit (range, signals[CHANGE_VALUE], 0,
2727                      GTK_SCROLL_JUMP, adj->value + delta,
2728                      &handled);
2729     }
2730
2731   return TRUE;
2732 }
2733
2734 static gboolean
2735 gtk_range_motion_notify (GtkWidget      *widget,
2736                          GdkEventMotion *event)
2737 {
2738   GtkRange *range = GTK_RANGE (widget);
2739   GtkRangePrivate *priv = range->priv;
2740
2741   gdk_event_request_motions (event);
2742
2743   priv->mouse_x = event->x;
2744   priv->mouse_y = event->y;
2745
2746   if (gtk_range_update_mouse_location (range))
2747     gtk_widget_queue_draw (widget);
2748
2749   if (priv->grab_location == MOUSE_SLIDER)
2750     update_slider_position (range, event->x, event->y);
2751
2752   /* We handled the event if the mouse was in the range_rect */
2753   return priv->mouse_location != MOUSE_OUTSIDE;
2754 }
2755
2756 static gboolean
2757 gtk_range_enter_notify (GtkWidget        *widget,
2758                         GdkEventCrossing *event)
2759 {
2760   GtkRange *range = GTK_RANGE (widget);
2761   GtkRangePrivate *priv = range->priv;
2762
2763   priv->mouse_x = event->x;
2764   priv->mouse_y = event->y;
2765
2766   if (gtk_range_update_mouse_location (range))
2767     gtk_widget_queue_draw (widget);
2768
2769   return TRUE;
2770 }
2771
2772 static gboolean
2773 gtk_range_leave_notify (GtkWidget        *widget,
2774                         GdkEventCrossing *event)
2775 {
2776   GtkRange *range = GTK_RANGE (widget);
2777   GtkRangePrivate *priv = range->priv;
2778
2779   priv->mouse_x = -1;
2780   priv->mouse_y = -1;
2781
2782   if (gtk_range_update_mouse_location (range))
2783     gtk_widget_queue_draw (widget);
2784
2785   return TRUE;
2786 }
2787
2788 static void
2789 gtk_range_grab_notify (GtkWidget *widget,
2790                        gboolean   was_grabbed)
2791 {
2792   GtkRangePrivate *priv = GTK_RANGE (widget)->priv;
2793
2794   if (priv->grab_device &&
2795       gtk_widget_device_is_shadowed (widget, priv->grab_device))
2796     stop_scrolling (GTK_RANGE (widget));
2797 }
2798
2799 static void
2800 gtk_range_state_flags_changed (GtkWidget     *widget,
2801                                GtkStateFlags  previous_state)
2802 {
2803   if (!gtk_widget_is_sensitive (widget))
2804     stop_scrolling (GTK_RANGE (widget));
2805 }
2806
2807 #define check_rectangle(rectangle1, rectangle2)              \
2808   {                                                          \
2809     if (rectangle1.x != rectangle2.x) return TRUE;           \
2810     if (rectangle1.y != rectangle2.y) return TRUE;           \
2811     if (rectangle1.width  != rectangle2.width)  return TRUE; \
2812     if (rectangle1.height != rectangle2.height) return TRUE; \
2813   }
2814
2815 static gboolean
2816 layout_changed (GtkRangePrivate *priv1,
2817                 GtkRangePrivate *priv2)
2818 {
2819   check_rectangle (priv1->slider, priv2->slider);
2820   check_rectangle (priv1->trough, priv2->trough);
2821   check_rectangle (priv1->stepper_a, priv2->stepper_a);
2822   check_rectangle (priv1->stepper_d, priv2->stepper_d);
2823   check_rectangle (priv1->stepper_b, priv2->stepper_b);
2824   check_rectangle (priv1->stepper_c, priv2->stepper_c);
2825
2826   if (priv1->upper_sensitive != priv2->upper_sensitive) return TRUE;
2827   if (priv1->lower_sensitive != priv2->lower_sensitive) return TRUE;
2828
2829   return FALSE;
2830 }
2831
2832 static void
2833 gtk_range_adjustment_changed (GtkAdjustment *adjustment,
2834                               gpointer       data)
2835 {
2836   GtkRange *range = GTK_RANGE (data);
2837   GtkRangePrivate *priv = range->priv;
2838   GtkRangePrivate priv_aux = *priv;
2839
2840   priv->recalc_marks = TRUE;
2841   priv->need_recalc = TRUE;
2842   gtk_range_calc_layout (range, priv->adjustment->value);
2843
2844   /* now check whether the layout changed  */
2845   if (layout_changed (priv, &priv_aux))
2846     gtk_widget_queue_draw (GTK_WIDGET (range));
2847
2848   /* Note that we don't round off to priv->round_digits here.
2849    * that's because it's really broken to change a value
2850    * in response to a change signal on that value; round_digits
2851    * is therefore defined to be a filter on what the GtkRange
2852    * can input into the adjustment, not a filter that the GtkRange
2853    * will enforce on the adjustment.
2854    */
2855 }
2856
2857 static gboolean
2858 force_repaint (gpointer data)
2859 {
2860   GtkRange *range = GTK_RANGE (data);
2861   GtkRangePrivate *priv = range->priv;
2862   GtkWidget *widget = GTK_WIDGET (range);
2863
2864   priv->repaint_id = 0;
2865   if (gtk_widget_is_drawable (widget))
2866     gdk_window_process_updates (gtk_widget_get_window (widget), FALSE);
2867
2868   return FALSE;
2869 }
2870
2871 static void
2872 gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
2873                                     gpointer       data)
2874 {
2875   GtkRange *range = GTK_RANGE (data);
2876   GtkRangePrivate *priv = range->priv;
2877   GtkRangePrivate priv_aux = *priv;
2878
2879   priv->need_recalc = TRUE;
2880   gtk_range_calc_layout (range, priv->adjustment->value);
2881
2882   /* now check whether the layout changed  */
2883   if (layout_changed (priv, &priv_aux) ||
2884       (GTK_IS_SCALE (range) && gtk_scale_get_draw_value (GTK_SCALE (range))))
2885     {
2886       gtk_widget_queue_draw (GTK_WIDGET (range));
2887       /* setup a timer to ensure the range isn't lagging too much behind the scroll position */
2888       if (!priv->repaint_id)
2889         priv->repaint_id = gdk_threads_add_timeout_full (GDK_PRIORITY_EVENTS,
2890                                                          181, force_repaint,
2891                                                          range, NULL);
2892     }
2893
2894   /* Note that we don't round off to priv->round_digits here.
2895    * that's because it's really broken to change a value
2896    * in response to a change signal on that value; round_digits
2897    * is therefore defined to be a filter on what the GtkRange
2898    * can input into the adjustment, not a filter that the GtkRange
2899    * will enforce on the adjustment.
2900    */
2901
2902   g_signal_emit (range, signals[VALUE_CHANGED], 0);
2903 }
2904
2905 static void
2906 gtk_range_style_updated (GtkWidget *widget)
2907 {
2908   GtkRange *range = GTK_RANGE (widget);
2909   GtkRangePrivate *priv = range->priv;
2910
2911   priv->need_recalc = TRUE;
2912
2913   GTK_WIDGET_CLASS (gtk_range_parent_class)->style_updated (widget);
2914 }
2915
2916 static void
2917 apply_marks (GtkRange *range,
2918              gdouble   oldval,
2919              gdouble  *newval)
2920 {
2921   GtkRangePrivate *priv = range->priv;
2922   gint i;
2923   gdouble mark;
2924
2925   for (i = 0; i < priv->n_marks; i++)
2926     {
2927       mark = priv->marks[i];
2928       if ((oldval < mark && mark < *newval) ||
2929           (oldval > mark && mark > *newval))
2930         {
2931           *newval = mark;
2932           return;
2933         }
2934     }
2935 }
2936
2937 static void
2938 step_back (GtkRange *range)
2939 {
2940   GtkRangePrivate *priv = range->priv;
2941   gdouble newval;
2942   gboolean handled;
2943
2944   newval = priv->adjustment->value - priv->adjustment->step_increment;
2945   apply_marks (range, priv->adjustment->value, &newval);
2946   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2947                  GTK_SCROLL_STEP_BACKWARD, newval, &handled);
2948 }
2949
2950 static void
2951 step_forward (GtkRange *range)
2952 {
2953   GtkRangePrivate *priv = range->priv;
2954   gdouble newval;
2955   gboolean handled;
2956
2957   newval = priv->adjustment->value + priv->adjustment->step_increment;
2958   apply_marks (range, priv->adjustment->value, &newval);
2959   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2960                  GTK_SCROLL_STEP_FORWARD, newval, &handled);
2961 }
2962
2963
2964 static void
2965 page_back (GtkRange *range)
2966 {
2967   GtkRangePrivate *priv = range->priv;
2968   gdouble newval;
2969   gboolean handled;
2970
2971   newval = priv->adjustment->value - priv->adjustment->page_increment;
2972   apply_marks (range, priv->adjustment->value, &newval);
2973   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2974                  GTK_SCROLL_PAGE_BACKWARD, newval, &handled);
2975 }
2976
2977 static void
2978 page_forward (GtkRange *range)
2979 {
2980   GtkRangePrivate *priv = range->priv;
2981   gdouble newval;
2982   gboolean handled;
2983
2984   newval = priv->adjustment->value + priv->adjustment->page_increment;
2985   apply_marks (range, priv->adjustment->value, &newval);
2986   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2987                  GTK_SCROLL_PAGE_FORWARD, newval, &handled);
2988 }
2989
2990 static void
2991 scroll_begin (GtkRange *range)
2992 {
2993   GtkRangePrivate *priv = range->priv;
2994   gboolean handled;
2995
2996   g_signal_emit (range, signals[CHANGE_VALUE], 0,
2997                  GTK_SCROLL_START, priv->adjustment->lower,
2998                  &handled);
2999 }
3000
3001 static void
3002 scroll_end (GtkRange *range)
3003 {
3004   GtkRangePrivate *priv = range->priv;
3005   gdouble newval;
3006   gboolean handled;
3007
3008   newval = priv->adjustment->upper - priv->adjustment->page_size;
3009   g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval,
3010                  &handled);
3011 }
3012
3013 static gboolean
3014 gtk_range_scroll (GtkRange     *range,
3015                   GtkScrollType scroll)
3016 {
3017   GtkRangePrivate *priv = range->priv;
3018   gdouble old_value = priv->adjustment->value;
3019
3020   switch (scroll)
3021     {
3022     case GTK_SCROLL_STEP_LEFT:
3023       if (should_invert (range))
3024         step_forward (range);
3025       else
3026         step_back (range);
3027       break;
3028
3029     case GTK_SCROLL_STEP_UP:
3030       if (should_invert (range))
3031         step_forward (range);
3032       else
3033         step_back (range);
3034       break;
3035
3036     case GTK_SCROLL_STEP_RIGHT:
3037       if (should_invert (range))
3038         step_back (range);
3039       else
3040         step_forward (range);
3041       break;
3042
3043     case GTK_SCROLL_STEP_DOWN:
3044       if (should_invert (range))
3045         step_back (range);
3046       else
3047         step_forward (range);
3048       break;
3049
3050     case GTK_SCROLL_STEP_BACKWARD:
3051       step_back (range);
3052       break;
3053
3054     case GTK_SCROLL_STEP_FORWARD:
3055       step_forward (range);
3056       break;
3057
3058     case GTK_SCROLL_PAGE_LEFT:
3059       if (should_invert (range))
3060         page_forward (range);
3061       else
3062         page_back (range);
3063       break;
3064
3065     case GTK_SCROLL_PAGE_UP:
3066       if (should_invert (range))
3067         page_forward (range);
3068       else
3069         page_back (range);
3070       break;
3071
3072     case GTK_SCROLL_PAGE_RIGHT:
3073       if (should_invert (range))
3074         page_back (range);
3075       else
3076         page_forward (range);
3077       break;
3078
3079     case GTK_SCROLL_PAGE_DOWN:
3080       if (should_invert (range))
3081         page_back (range);
3082       else
3083         page_forward (range);
3084       break;
3085
3086     case GTK_SCROLL_PAGE_BACKWARD:
3087       page_back (range);
3088       break;
3089
3090     case GTK_SCROLL_PAGE_FORWARD:
3091       page_forward (range);
3092       break;
3093
3094     case GTK_SCROLL_START:
3095       scroll_begin (range);
3096       break;
3097
3098     case GTK_SCROLL_END:
3099       scroll_end (range);
3100       break;
3101
3102     case GTK_SCROLL_JUMP:
3103       /* Used by CList, range doesn't use it. */
3104       break;
3105
3106     case GTK_SCROLL_NONE:
3107       break;
3108     }
3109
3110   return priv->adjustment->value != old_value;
3111 }
3112
3113 static void
3114 gtk_range_move_slider (GtkRange     *range,
3115                        GtkScrollType scroll)
3116 {
3117   GtkRangePrivate *priv = range->priv;
3118   gboolean cursor_only;
3119
3120   g_object_get (gtk_widget_get_settings (GTK_WIDGET (range)),
3121                 "gtk-keynav-cursor-only", &cursor_only,
3122                 NULL);
3123
3124   if (cursor_only)
3125     {
3126       GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (range));
3127
3128       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
3129         {
3130           if (scroll == GTK_SCROLL_STEP_UP ||
3131               scroll == GTK_SCROLL_STEP_DOWN)
3132             {
3133               if (toplevel)
3134                 gtk_widget_child_focus (toplevel,
3135                                         scroll == GTK_SCROLL_STEP_UP ?
3136                                         GTK_DIR_UP : GTK_DIR_DOWN);
3137               return;
3138             }
3139         }
3140       else
3141         {
3142           if (scroll == GTK_SCROLL_STEP_LEFT ||
3143               scroll == GTK_SCROLL_STEP_RIGHT)
3144             {
3145               if (toplevel)
3146                 gtk_widget_child_focus (toplevel,
3147                                         scroll == GTK_SCROLL_STEP_LEFT ?
3148                                         GTK_DIR_LEFT : GTK_DIR_RIGHT);
3149               return;
3150             }
3151         }
3152     }
3153
3154   if (! gtk_range_scroll (range, scroll))
3155     gtk_widget_error_bell (GTK_WIDGET (range));
3156 }
3157
3158 static void
3159 gtk_range_get_props (GtkRange  *range,
3160                      gint      *slider_width,
3161                      gint      *stepper_size,
3162                      gint      *focus_width,
3163                      gint      *trough_border,
3164                      gint      *stepper_spacing,
3165                      gboolean  *trough_under_steppers,
3166                      gint      *arrow_displacement_x,
3167                      gint      *arrow_displacement_y)
3168 {
3169   GtkWidget *widget =  GTK_WIDGET (range);
3170   gint tmp_slider_width, tmp_stepper_size, tmp_focus_width, tmp_trough_border;
3171   gint tmp_stepper_spacing, tmp_trough_under_steppers;
3172   gint tmp_arrow_displacement_x, tmp_arrow_displacement_y;
3173
3174   gtk_widget_style_get (widget,
3175                         "slider-width", &tmp_slider_width,
3176                         "trough-border", &tmp_trough_border,
3177                         "stepper-size", &tmp_stepper_size,
3178                         "stepper-spacing", &tmp_stepper_spacing,
3179                         "trough-under-steppers", &tmp_trough_under_steppers,
3180                         "arrow-displacement-x", &tmp_arrow_displacement_x,
3181                         "arrow-displacement-y", &tmp_arrow_displacement_y,
3182                         NULL);
3183
3184   if (tmp_stepper_spacing > 0)
3185     tmp_trough_under_steppers = FALSE;
3186
3187   if (gtk_widget_get_can_focus (GTK_WIDGET (range)))
3188     {
3189       gint focus_line_width;
3190       gint focus_padding;
3191
3192       gtk_widget_style_get (GTK_WIDGET (range),
3193                             "focus-line-width", &focus_line_width,
3194                             "focus-padding", &focus_padding,
3195                             NULL);
3196
3197       tmp_focus_width = focus_line_width + focus_padding;
3198     }
3199   else
3200     {
3201       tmp_focus_width = 0;
3202     }
3203
3204   if (slider_width)
3205     *slider_width = tmp_slider_width;
3206
3207   if (focus_width)
3208     *focus_width = tmp_focus_width;
3209
3210   if (trough_border)
3211     *trough_border = tmp_trough_border;
3212
3213   if (stepper_size)
3214     *stepper_size = tmp_stepper_size;
3215
3216   if (stepper_spacing)
3217     *stepper_spacing = tmp_stepper_spacing;
3218
3219   if (trough_under_steppers)
3220     *trough_under_steppers = tmp_trough_under_steppers;
3221
3222   if (arrow_displacement_x)
3223     *arrow_displacement_x = tmp_arrow_displacement_x;
3224
3225   if (arrow_displacement_y)
3226     *arrow_displacement_y = tmp_arrow_displacement_y;
3227 }
3228
3229 #define POINT_IN_RECT(xcoord, ycoord, rect) \
3230  ((xcoord) >= (rect).x &&                   \
3231   (xcoord) <  ((rect).x + (rect).width) &&  \
3232   (ycoord) >= (rect).y &&                   \
3233   (ycoord) <  ((rect).y + (rect).height))
3234
3235 /* Update mouse location, return TRUE if it changes */
3236 static gboolean
3237 gtk_range_update_mouse_location (GtkRange *range)
3238 {
3239   GtkRangePrivate *priv = range->priv;
3240   GtkAllocation allocation;
3241   gint x, y;
3242   MouseLocation old;
3243   GtkWidget *widget = GTK_WIDGET (range);
3244
3245   old = priv->mouse_location;
3246
3247   x = priv->mouse_x;
3248   y = priv->mouse_y;
3249
3250   gtk_widget_get_allocation (widget, &allocation);
3251
3252   if (priv->grab_location != MOUSE_OUTSIDE)
3253     priv->mouse_location = priv->grab_location;
3254   else if (POINT_IN_RECT (x, y, priv->stepper_a))
3255     priv->mouse_location = MOUSE_STEPPER_A;
3256   else if (POINT_IN_RECT (x, y, priv->stepper_b))
3257     priv->mouse_location = MOUSE_STEPPER_B;
3258   else if (POINT_IN_RECT (x, y, priv->stepper_c))
3259     priv->mouse_location = MOUSE_STEPPER_C;
3260   else if (POINT_IN_RECT (x, y, priv->stepper_d))
3261     priv->mouse_location = MOUSE_STEPPER_D;
3262   else if (POINT_IN_RECT (x, y, priv->slider))
3263     priv->mouse_location = MOUSE_SLIDER;
3264   else if (POINT_IN_RECT (x, y, priv->trough))
3265     priv->mouse_location = MOUSE_TROUGH;
3266   else if (POINT_IN_RECT (x, y, allocation))
3267     priv->mouse_location = MOUSE_WIDGET;
3268   else
3269     priv->mouse_location = MOUSE_OUTSIDE;
3270
3271   return old != priv->mouse_location;
3272 }
3273
3274 /* Clamp rect, border inside widget->allocation, such that we prefer
3275  * to take space from border not rect in all directions, and prefer to
3276  * give space to border over rect in one direction.
3277  */
3278 static void
3279 clamp_dimensions (GtkWidget    *widget,
3280                   GdkRectangle *rect,
3281                   GtkBorder    *border,
3282                   gboolean      border_expands_horizontally)
3283 {
3284   GtkAllocation allocation;
3285   gint extra, shortage;
3286
3287   g_return_if_fail (rect->x == 0);
3288   g_return_if_fail (rect->y == 0);
3289   g_return_if_fail (rect->width >= 0);
3290   g_return_if_fail (rect->height >= 0);
3291
3292   gtk_widget_get_allocation (widget, &allocation);
3293
3294   /* Width */
3295
3296   extra = allocation.width - border->left - border->right - rect->width;
3297   if (extra > 0)
3298     {
3299       if (border_expands_horizontally)
3300         {
3301           border->left += extra / 2;
3302           border->right += extra / 2 + extra % 2;
3303         }
3304       else
3305         {
3306           rect->width += extra;
3307         }
3308     }
3309
3310   /* See if we can fit rect, if not kill the border */
3311   shortage = rect->width - allocation.width;
3312   if (shortage > 0)
3313     {
3314       rect->width = allocation.width;
3315       /* lose the border */
3316       border->left = 0;
3317       border->right = 0;
3318     }
3319   else
3320     {
3321       /* See if we can fit rect with borders */
3322       shortage = rect->width + border->left + border->right - allocation.width;
3323       if (shortage > 0)
3324         {
3325           /* Shrink borders */
3326           border->left -= shortage / 2;
3327           border->right -= shortage / 2 + shortage % 2;
3328         }
3329     }
3330
3331   /* Height */
3332
3333   extra = allocation.height - border->top - border->bottom - rect->height;
3334   if (extra > 0)
3335     {
3336       if (border_expands_horizontally)
3337         {
3338           /* don't expand border vertically */
3339           rect->height += extra;
3340         }
3341       else
3342         {
3343           border->top += extra / 2;
3344           border->bottom += extra / 2 + extra % 2;
3345         }
3346     }
3347
3348   /* See if we can fit rect, if not kill the border */
3349   shortage = rect->height - allocation.height;
3350   if (shortage > 0)
3351     {
3352       rect->height = allocation.height;
3353       /* lose the border */
3354       border->top = 0;
3355       border->bottom = 0;
3356     }
3357   else
3358     {
3359       /* See if we can fit rect with borders */
3360       shortage = rect->height + border->top + border->bottom - allocation.height;
3361       if (shortage > 0)
3362         {
3363           /* Shrink borders */
3364           border->top -= shortage / 2;
3365           border->bottom -= shortage / 2 + shortage % 2;
3366         }
3367     }
3368 }
3369
3370 static void
3371 gtk_range_calc_request (GtkRange      *range,
3372                         gint           slider_width,
3373                         gint           stepper_size,
3374                         gint           focus_width,
3375                         gint           trough_border,
3376                         gint           stepper_spacing,
3377                         GdkRectangle  *range_rect,
3378                         GtkBorder     *border,
3379                         gint          *n_steppers_p,
3380                         gboolean      *has_steppers_ab,
3381                         gboolean      *has_steppers_cd,
3382                         gint          *slider_length_p)
3383 {
3384   GtkRangePrivate *priv = range->priv;
3385   gint slider_length;
3386   gint n_steppers;
3387   gint n_steppers_ab;
3388   gint n_steppers_cd;
3389
3390   border->left = 0;
3391   border->right = 0;
3392   border->top = 0;
3393   border->bottom = 0;
3394
3395   if (GTK_RANGE_GET_CLASS (range)->get_range_border)
3396     GTK_RANGE_GET_CLASS (range)->get_range_border (range, border);
3397
3398   n_steppers_ab = 0;
3399   n_steppers_cd = 0;
3400
3401   if (priv->has_stepper_a)
3402     n_steppers_ab += 1;
3403   if (priv->has_stepper_b)
3404     n_steppers_ab += 1;
3405   if (priv->has_stepper_c)
3406     n_steppers_cd += 1;
3407   if (priv->has_stepper_d)
3408     n_steppers_cd += 1;
3409
3410   n_steppers = n_steppers_ab + n_steppers_cd;
3411
3412   slider_length = priv->min_slider_size;
3413
3414   range_rect->x = 0;
3415   range_rect->y = 0;
3416
3417   /* We never expand to fill available space in the small dimension
3418    * (i.e. vertical scrollbars are always a fixed width)
3419    */
3420   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3421     {
3422       range_rect->width = (focus_width + trough_border) * 2 + slider_width;
3423       range_rect->height = stepper_size * n_steppers + (focus_width + trough_border) * 2 + slider_length;
3424
3425       if (n_steppers_ab > 0)
3426         range_rect->height += stepper_spacing;
3427
3428       if (n_steppers_cd > 0)
3429         range_rect->height += stepper_spacing;
3430     }
3431   else
3432     {
3433       range_rect->width = stepper_size * n_steppers + (focus_width + trough_border) * 2 + slider_length;
3434       range_rect->height = (focus_width + trough_border) * 2 + slider_width;
3435
3436       if (n_steppers_ab > 0)
3437         range_rect->width += stepper_spacing;
3438
3439       if (n_steppers_cd > 0)
3440         range_rect->width += stepper_spacing;
3441     }
3442
3443   if (n_steppers_p)
3444     *n_steppers_p = n_steppers;
3445
3446   if (has_steppers_ab)
3447     *has_steppers_ab = (n_steppers_ab > 0);
3448
3449   if (has_steppers_cd)
3450     *has_steppers_cd = (n_steppers_cd > 0);
3451
3452   if (slider_length_p)
3453     *slider_length_p = slider_length;
3454 }
3455
3456 static void
3457 gtk_range_calc_layout (GtkRange *range,
3458                        gdouble   adjustment_value)
3459 {
3460   GtkRangePrivate *priv = range->priv;
3461   gint slider_width, stepper_size, focus_width, trough_border, stepper_spacing;
3462   gint slider_length;
3463   GtkBorder border;
3464   gint n_steppers;
3465   gboolean has_steppers_ab;
3466   gboolean has_steppers_cd;
3467   gboolean trough_under_steppers;
3468   GdkRectangle range_rect;
3469   GtkWidget *widget;
3470
3471   if (!priv->need_recalc)
3472     return;
3473
3474   /* If we have a too-small allocation, we prefer the steppers over
3475    * the trough/slider, probably the steppers are a more useful
3476    * feature in small spaces.
3477    *
3478    * Also, we prefer to draw the range itself rather than the border
3479    * areas if there's a conflict, since the borders will be decoration
3480    * not controls. Though this depends on subclasses cooperating by
3481    * not drawing on priv->range_rect.
3482    */
3483
3484   widget = GTK_WIDGET (range);
3485
3486   gtk_range_get_props (range,
3487                        &slider_width, &stepper_size,
3488                        &focus_width, &trough_border,
3489                        &stepper_spacing, &trough_under_steppers,
3490                        NULL, NULL);
3491
3492   gtk_range_calc_request (range,
3493                           slider_width, stepper_size,
3494                           focus_width, trough_border, stepper_spacing,
3495                           &range_rect, &border, &n_steppers,
3496                           &has_steppers_ab, &has_steppers_cd, &slider_length);
3497
3498   /* We never expand to fill available space in the small dimension
3499    * (i.e. vertical scrollbars are always a fixed width)
3500    */
3501   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3502     {
3503       clamp_dimensions (widget, &range_rect, &border, TRUE);
3504     }
3505   else
3506     {
3507       clamp_dimensions (widget, &range_rect, &border, FALSE);
3508     }
3509
3510   range_rect.x = border.left;
3511   range_rect.y = border.top;
3512
3513   priv->range_rect = range_rect;
3514
3515   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
3516     {
3517       gint stepper_width, stepper_height;
3518
3519       /* Steppers are the width of the range, and stepper_size in
3520        * height, or if we don't have enough height, divided equally
3521        * among available space.
3522        */
3523       stepper_width = range_rect.width - focus_width * 2;
3524
3525       if (trough_under_steppers)
3526         stepper_width -= trough_border * 2;
3527
3528       if (stepper_width < 1)
3529         stepper_width = range_rect.width; /* screw the trough border */
3530
3531       if (n_steppers == 0)
3532         stepper_height = 0; /* avoid divide by n_steppers */
3533       else
3534         stepper_height = MIN (stepper_size, (range_rect.height / n_steppers));
3535
3536       /* Stepper A */
3537
3538       priv->stepper_a.x = range_rect.x + focus_width + trough_border * trough_under_steppers;
3539       priv->stepper_a.y = range_rect.y + focus_width + trough_border * trough_under_steppers;
3540
3541       if (priv->has_stepper_a)
3542         {
3543           priv->stepper_a.width = stepper_width;
3544           priv->stepper_a.height = stepper_height;
3545         }
3546       else
3547         {
3548           priv->stepper_a.width = 0;
3549           priv->stepper_a.height = 0;
3550         }
3551
3552       /* Stepper B */
3553
3554       priv->stepper_b.x = priv->stepper_a.x;
3555       priv->stepper_b.y = priv->stepper_a.y + priv->stepper_a.height;
3556
3557       if (priv->has_stepper_b)
3558         {
3559           priv->stepper_b.width = stepper_width;
3560           priv->stepper_b.height = stepper_height;
3561         }
3562       else
3563         {
3564           priv->stepper_b.width = 0;
3565           priv->stepper_b.height = 0;
3566         }
3567
3568       /* Stepper D */
3569
3570       if (priv->has_stepper_d)
3571         {
3572           priv->stepper_d.width = stepper_width;
3573           priv->stepper_d.height = stepper_height;
3574         }
3575       else
3576         {
3577           priv->stepper_d.width = 0;
3578           priv->stepper_d.height = 0;
3579         }
3580
3581       priv->stepper_d.x = priv->stepper_a.x;
3582       priv->stepper_d.y = range_rect.y + range_rect.height - priv->stepper_d.height - focus_width - trough_border * trough_under_steppers;
3583
3584       /* Stepper C */
3585
3586       if (priv->has_stepper_c)
3587         {
3588           priv->stepper_c.width = stepper_width;
3589           priv->stepper_c.height = stepper_height;
3590         }
3591       else
3592         {
3593           priv->stepper_c.width = 0;
3594           priv->stepper_c.height = 0;
3595         }
3596
3597       priv->stepper_c.x = priv->stepper_a.x;
3598       priv->stepper_c.y = priv->stepper_d.y - priv->stepper_c.height;
3599
3600       /* Now the trough is the remaining space between steppers B and C,
3601        * if any, minus spacing
3602        */
3603       priv->trough.x = range_rect.x;
3604       priv->trough.y = priv->stepper_b.y + priv->stepper_b.height + stepper_spacing * has_steppers_ab;
3605       priv->trough.width = range_rect.width;
3606       priv->trough.height = priv->stepper_c.y - priv->trough.y - stepper_spacing * has_steppers_cd;
3607
3608       /* Slider fits into the trough, with stepper_spacing on either side,
3609        * and the size/position based on the adjustment or fixed, depending.
3610        */
3611       priv->slider.x = priv->trough.x + focus_width + trough_border;
3612       priv->slider.width = priv->trough.width - (focus_width + trough_border) * 2;
3613
3614       /* Compute slider position/length */
3615       {
3616         gint y, bottom, top, height;
3617
3618         top = priv->trough.y;
3619         bottom = priv->trough.y + priv->trough.height;
3620
3621         if (! trough_under_steppers)
3622           {
3623             top += trough_border;
3624             bottom -= trough_border;
3625           }
3626
3627         /* slider height is the fraction (page_size /
3628          * total_adjustment_range) times the trough height in pixels
3629          */
3630
3631         if (priv->adjustment->upper - priv->adjustment->lower != 0)
3632           height = ((bottom - top) * (priv->adjustment->page_size /
3633                                        (priv->adjustment->upper - priv->adjustment->lower)));
3634         else
3635           height = priv->min_slider_size;
3636
3637         if (height < priv->min_slider_size ||
3638             priv->slider_size_fixed)
3639           height = priv->min_slider_size;
3640
3641         height = MIN (height, priv->trough.height);
3642
3643         y = top;
3644
3645         if (priv->adjustment->upper - priv->adjustment->lower - priv->adjustment->page_size != 0)
3646           y += (bottom - top - height) * ((adjustment_value - priv->adjustment->lower) /
3647                                           (priv->adjustment->upper - priv->adjustment->lower - priv->adjustment->page_size));
3648
3649         y = CLAMP (y, top, bottom);
3650
3651         if (should_invert (range))
3652           y = bottom - (y - top + height);
3653
3654         priv->slider.y = y;
3655         priv->slider.height = height;
3656
3657         /* These are publically exported */
3658         priv->slider_start = priv->slider.y;
3659         priv->slider_end = priv->slider.y + priv->slider.height;
3660       }
3661     }
3662   else
3663     {
3664       gint stepper_width, stepper_height;
3665
3666       /* Steppers are the height of the range, and stepper_size in
3667        * width, or if we don't have enough width, divided equally
3668        * among available space.
3669        */
3670       stepper_height = range_rect.height + focus_width * 2;
3671
3672       if (trough_under_steppers)
3673         stepper_height -= trough_border * 2;
3674
3675       if (stepper_height < 1)
3676         stepper_height = range_rect.height; /* screw the trough border */
3677
3678       if (n_steppers == 0)
3679         stepper_width = 0; /* avoid divide by n_steppers */
3680       else
3681         stepper_width = MIN (stepper_size, (range_rect.width / n_steppers));
3682
3683       /* Stepper A */
3684
3685       priv->stepper_a.x = range_rect.x + focus_width + trough_border * trough_under_steppers;
3686       priv->stepper_a.y = range_rect.y + focus_width + trough_border * trough_under_steppers;
3687
3688       if (priv->has_stepper_a)
3689         {
3690           priv->stepper_a.width = stepper_width;
3691           priv->stepper_a.height = stepper_height;
3692         }
3693       else
3694         {
3695           priv->stepper_a.width = 0;
3696           priv->stepper_a.height = 0;
3697         }
3698
3699       /* Stepper B */
3700
3701       priv->stepper_b.x = priv->stepper_a.x + priv->stepper_a.width;
3702       priv->stepper_b.y = priv->stepper_a.y;
3703
3704       if (priv->has_stepper_b)
3705         {
3706           priv->stepper_b.width = stepper_width;
3707           priv->stepper_b.height = stepper_height;
3708         }
3709       else
3710         {
3711           priv->stepper_b.width = 0;
3712           priv->stepper_b.height = 0;
3713         }
3714
3715       /* Stepper D */
3716
3717       if (priv->has_stepper_d)
3718         {
3719           priv->stepper_d.width = stepper_width;
3720           priv->stepper_d.height = stepper_height;
3721         }
3722       else
3723         {
3724           priv->stepper_d.width = 0;
3725           priv->stepper_d.height = 0;
3726         }
3727
3728       priv->stepper_d.x = range_rect.x + range_rect.width - priv->stepper_d.width - focus_width - trough_border * trough_under_steppers;
3729       priv->stepper_d.y = priv->stepper_a.y;
3730
3731
3732       /* Stepper C */
3733
3734       if (priv->has_stepper_c)
3735         {
3736           priv->stepper_c.width = stepper_width;
3737           priv->stepper_c.height = stepper_height;
3738         }
3739       else
3740         {
3741           priv->stepper_c.width = 0;
3742           priv->stepper_c.height = 0;
3743         }
3744
3745       priv->stepper_c.x = priv->stepper_d.x - priv->stepper_c.width;
3746       priv->stepper_c.y = priv->stepper_a.y;
3747
3748       /* Now the trough is the remaining space between steppers B and C,
3749        * if any
3750        */
3751       priv->trough.x = priv->stepper_b.x + priv->stepper_b.width + stepper_spacing * has_steppers_ab;
3752       priv->trough.y = range_rect.y;
3753
3754       priv->trough.width = priv->stepper_c.x - priv->trough.x - stepper_spacing * has_steppers_cd;
3755       priv->trough.height = range_rect.height;
3756
3757       /* Slider fits into the trough, with stepper_spacing on either side,
3758        * and the size/position based on the adjustment or fixed, depending.
3759        */
3760       priv->slider.y = priv->trough.y + focus_width + trough_border;
3761       priv->slider.height = priv->trough.height - (focus_width + trough_border) * 2;
3762
3763       /* Compute slider position/length */
3764       {
3765         gint x, left, right, width;
3766
3767         left = priv->trough.x;
3768         right = priv->trough.x + priv->trough.width;
3769
3770         if (! trough_under_steppers)
3771           {
3772             left += trough_border;
3773             right -= trough_border;
3774           }
3775
3776         /* slider width is the fraction (page_size /
3777          * total_adjustment_range) times the trough width in pixels
3778          */
3779
3780         if (priv->adjustment->upper - priv->adjustment->lower != 0)
3781           width = ((right - left) * (priv->adjustment->page_size /
3782                                    (priv->adjustment->upper - priv->adjustment->lower)));
3783         else
3784           width = priv->min_slider_size;
3785
3786         if (width < priv->min_slider_size ||
3787             priv->slider_size_fixed)
3788           width = priv->min_slider_size;
3789
3790         width = MIN (width, priv->trough.width);
3791
3792         x = left;
3793
3794         if (priv->adjustment->upper - priv->adjustment->lower - priv->adjustment->page_size != 0)
3795           x += (right - left - width) * ((adjustment_value - priv->adjustment->lower) /
3796                                          (priv->adjustment->upper - priv->adjustment->lower - priv->adjustment->page_size));
3797
3798         x = CLAMP (x, left, right);
3799
3800         if (should_invert (range))
3801           x = right - (x - left + width);
3802
3803         priv->slider.x = x;
3804         priv->slider.width = width;
3805
3806         /* These are publically exported */
3807         priv->slider_start = priv->slider.x;
3808         priv->slider_end = priv->slider.x + priv->slider.width;
3809       }
3810     }
3811
3812   gtk_range_update_mouse_location (range);
3813
3814   switch (priv->upper_sensitivity)
3815     {
3816     case GTK_SENSITIVITY_AUTO:
3817       priv->upper_sensitive =
3818         (priv->adjustment->value <
3819          (priv->adjustment->upper - priv->adjustment->page_size));
3820       break;
3821
3822     case GTK_SENSITIVITY_ON:
3823       priv->upper_sensitive = TRUE;
3824       break;
3825
3826     case GTK_SENSITIVITY_OFF:
3827       priv->upper_sensitive = FALSE;
3828       break;
3829     }
3830
3831   switch (priv->lower_sensitivity)
3832     {
3833     case GTK_SENSITIVITY_AUTO:
3834       priv->lower_sensitive =
3835         (priv->adjustment->value > priv->adjustment->lower);
3836       break;
3837
3838     case GTK_SENSITIVITY_ON:
3839       priv->lower_sensitive = TRUE;
3840       break;
3841
3842     case GTK_SENSITIVITY_OFF:
3843       priv->lower_sensitive = FALSE;
3844       break;
3845     }
3846 }
3847
3848 static GdkRectangle*
3849 get_area (GtkRange     *range,
3850           MouseLocation location)
3851 {
3852   GtkRangePrivate *priv = range->priv;
3853
3854   switch (location)
3855     {
3856     case MOUSE_STEPPER_A:
3857       return &priv->stepper_a;
3858     case MOUSE_STEPPER_B:
3859       return &priv->stepper_b;
3860     case MOUSE_STEPPER_C:
3861       return &priv->stepper_c;
3862     case MOUSE_STEPPER_D:
3863       return &priv->stepper_d;
3864     case MOUSE_TROUGH:
3865       return &priv->trough;
3866     case MOUSE_SLIDER:
3867       return &priv->slider;
3868     case MOUSE_WIDGET:
3869     case MOUSE_OUTSIDE:
3870       break;
3871     }
3872
3873   g_warning (G_STRLOC": bug");
3874   return NULL;
3875 }
3876
3877 static void
3878 gtk_range_calc_marks (GtkRange *range)
3879 {
3880   GtkRangePrivate *priv = range->priv;
3881   gint i;
3882
3883   if (!priv->recalc_marks)
3884     return;
3885
3886   priv->recalc_marks = FALSE;
3887
3888   for (i = 0; i < priv->n_marks; i++)
3889     {
3890       priv->need_recalc = TRUE;
3891       gtk_range_calc_layout (range, priv->marks[i]);
3892       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
3893         priv->mark_pos[i] = priv->slider.x + priv->slider.width / 2;
3894       else
3895         priv->mark_pos[i] = priv->slider.y + priv->slider.height / 2;
3896     }
3897
3898   priv->need_recalc = TRUE;
3899 }
3900
3901 static gboolean
3902 gtk_range_real_change_value (GtkRange     *range,
3903                              GtkScrollType scroll,
3904                              gdouble       value)
3905 {
3906   GtkRangePrivate *priv = range->priv;
3907
3908   /* potentially adjust the bounds _before_ we clamp */
3909   g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value);
3910
3911   if (priv->restrict_to_fill_level)
3912     value = MIN (value, MAX (priv->adjustment->lower,
3913                              priv->fill_level));
3914
3915   value = CLAMP (value, priv->adjustment->lower,
3916                  (priv->adjustment->upper - priv->adjustment->page_size));
3917
3918   if (priv->round_digits >= 0)
3919     {
3920       gdouble power;
3921       gint i;
3922
3923       i = priv->round_digits;
3924       power = 1;
3925       while (i--)
3926         power *= 10;
3927
3928       value = floor ((value * power) + 0.5) / power;
3929     }
3930
3931   if (priv->adjustment->value != value)
3932     {
3933       priv->need_recalc = TRUE;
3934
3935       gtk_widget_queue_draw (GTK_WIDGET (range));
3936
3937       gtk_adjustment_set_value (priv->adjustment, value);
3938     }
3939   return FALSE;
3940 }
3941
3942 struct _GtkRangeStepTimer
3943 {
3944   guint timeout_id;
3945   GtkScrollType step;
3946 };
3947
3948 static gboolean
3949 second_timeout (gpointer data)
3950 {
3951   GtkRange *range = GTK_RANGE (data);
3952   GtkRangePrivate *priv = range->priv;
3953
3954   gtk_range_scroll (range, priv->timer->step);
3955
3956   return TRUE;
3957 }
3958
3959 static gboolean
3960 initial_timeout (gpointer data)
3961 {
3962   GtkRange *range = GTK_RANGE (data);
3963   GtkRangePrivate *priv = range->priv;
3964   GtkSettings *settings;
3965   guint        timeout;
3966
3967   settings = gtk_widget_get_settings (GTK_WIDGET (data));
3968   g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
3969
3970   priv->timer->timeout_id = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
3971                                                      second_timeout,
3972                                                      range);
3973   /* remove self */
3974   return FALSE;
3975 }
3976
3977 static void
3978 gtk_range_add_step_timer (GtkRange      *range,
3979                           GtkScrollType  step)
3980 {
3981   GtkRangePrivate *priv = range->priv;
3982   GtkSettings *settings;
3983   guint        timeout;
3984
3985   g_return_if_fail (priv->timer == NULL);
3986   g_return_if_fail (step != GTK_SCROLL_NONE);
3987
3988   settings = gtk_widget_get_settings (GTK_WIDGET (range));
3989   g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
3990
3991   priv->timer = g_new (GtkRangeStepTimer, 1);
3992
3993   priv->timer->timeout_id = gdk_threads_add_timeout (timeout,
3994                                                      initial_timeout,
3995                                                      range);
3996   priv->timer->step = step;
3997
3998   gtk_range_scroll (range, priv->timer->step);
3999 }
4000
4001 static void
4002 gtk_range_remove_step_timer (GtkRange *range)
4003 {
4004   GtkRangePrivate *priv = range->priv;
4005
4006   if (priv->timer)
4007     {
4008       if (priv->timer->timeout_id != 0)
4009         g_source_remove (priv->timer->timeout_id);
4010
4011       g_free (priv->timer);
4012
4013       priv->timer = NULL;
4014     }
4015 }
4016
4017 void
4018 _gtk_range_set_stop_values (GtkRange *range,
4019                             gdouble  *values,
4020                             gint      n_values)
4021 {
4022   GtkRangePrivate *priv = range->priv;
4023   gint i;
4024
4025   g_free (priv->marks);
4026   priv->marks = g_new (gdouble, n_values);
4027
4028   g_free (priv->mark_pos);
4029   priv->mark_pos = g_new (gint, n_values);
4030
4031   priv->n_marks = n_values;
4032
4033   for (i = 0; i < n_values; i++)
4034     priv->marks[i] = values[i];
4035
4036   priv->recalc_marks = TRUE;
4037 }
4038
4039 gint
4040 _gtk_range_get_stop_positions (GtkRange  *range,
4041                                gint     **values)
4042 {
4043   GtkRangePrivate *priv = range->priv;
4044
4045   gtk_range_calc_marks (range);
4046
4047   if (values)
4048     *values = g_memdup (priv->mark_pos, priv->n_marks * sizeof (gint));
4049
4050   return priv->n_marks;
4051 }
4052
4053 void
4054 _gtk_range_set_round_digits (GtkRange *range,
4055                              gint     round_digits)
4056 {
4057   range->priv->round_digits = round_digits;
4058 }
4059
4060 void
4061 _gtk_range_set_steppers (GtkRange      *range,
4062                          gboolean       has_a,
4063                          gboolean       has_b,
4064                          gboolean       has_c,
4065                          gboolean       has_d)
4066 {
4067   range->priv->has_stepper_a = has_a;
4068   range->priv->has_stepper_b = has_b;
4069   range->priv->has_stepper_c = has_c;
4070   range->priv->has_stepper_d = has_d;
4071 }