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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2005 Ronald S. Bultje
   3  * Copyright (C) 2006, 2007 Christian Persch
   4  * Copyright (C) 2006 Jan Arne Petersen
   5  * Copyright (C) 2005-2007 Red Hat, Inc.
   6  *
   7  * Authors:
   8  * - Ronald S. Bultje <rbultje@ronald.bitfreak.net>
   9  * - Bastien Nocera <bnocera@redhat.com>
  10  * - Jan Arne Petersen <jpetersen@jpetersen.org>
  11  * - Christian Persch <chpe@svn.gnome.org>
  12  *
  13  * This library is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2 of the License, or (at your option) any later version.
  17  *
  18  * This library is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 /*
  28  * Modified by the GTK+ Team and others 2007.  See the AUTHORS
  29  * file for a list of people on the GTK+ Team.  See the ChangeLog
  30  * files for a list of changes.  These files are distributed with
  31  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  32  */
  33
  34 #include "config.h"
  35
  36 #include "gtkscalebutton.h"
  37
  38 #ifndef _WIN32
  39 #define _GNU_SOURCE
  40 #endif
  41 #include <math.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #include "gtkadjustment.h"
  46 #include "gtkbindings.h"
  47 #include "gtkframe.h"
  48 #include "gtkmain.h"
  49 #include "gtkmarshalers.h"
  50 #include "gtkorientable.h"
  51 #include "gtkprivate.h"
  52 #include "gtkscale.h"
  53 #include "gtkstock.h"
  54 #include "gtkbox.h"
  55 #include "gtkwindow.h"
  56 #include "gtktypebuiltins.h"
  57 #include "gtkintl.h"
  58 #include "a11y/gtkscalebuttonaccessible.h"
  59
  60 /**
  61  * SECTION:gtkscalebutton
  62  * @Short_description: A button which pops up a scale
  63  * @Title: GtkScaleButton
  64  *
  65  * #GtkScaleButton provides a button which pops up a scale widget.
  66  * This kind of widget is commonly used for volume controls in multimedia
  67  * applications, and GTK+ provides a #GtkVolumeButton subclass that
  68  * is tailored for this use case.
  69  */
  70
  71
  72 #define SCALE_SIZE 100
  73 #define CLICK_TIMEOUT 250
  74
  75 enum
  76 {
  77   VALUE_CHANGED,
  78   POPUP,
  79   POPDOWN,
  80
  81   LAST_SIGNAL
  82 };
  83
  84 enum
  85 {
  86   PROP_0,
  87
  88   PROP_ORIENTATION,
  89   PROP_VALUE,
  90   PROP_SIZE,
  91   PROP_ADJUSTMENT,
  92   PROP_ICONS
  93 };
  94
  95 struct _GtkScaleButtonPrivate
  96 {
  97   GtkWidget *plus_button;
  98   GtkWidget *minus_button;
  99   GtkWidget *dock;
 100   GtkWidget *box;
 101   GtkWidget *scale;
 102   GtkWidget *image;
 103
 104   GtkIconSize size;
 105   GtkOrientation orientation;
 106
 107   guint click_id;
 108   gint click_timeout;
 109   guint timeout : 1;
 110   gdouble direction;
 111   guint32 pop_time;
 112
 113   gchar **icon_list;
 114
 115   GdkDevice *grab_pointer;
 116   GdkDevice *grab_keyboard;
 117
 118   GtkAdjustment *adjustment; /* needed because it must be settable in init() */
 119 };
 120
 121 static GObject* gtk_scale_button_constructor    (GType                  type,
 122                                                  guint                  n_construct_properties,
 123                                                  GObjectConstructParam *construct_params);
 124 static void     gtk_scale_button_dispose        (GObject             *object);
 125 static void     gtk_scale_button_finalize       (GObject             *object);
 126 static void     gtk_scale_button_set_property   (GObject             *object,
 127                                                  guint                prop_id,
 128                                                  const GValue        *value,
 129                                                  GParamSpec          *pspec);
 130 static void     gtk_scale_button_get_property   (GObject             *object,
 131                                                  guint                prop_id,
 132                                                  GValue              *value,
 133                                                  GParamSpec          *pspec);
 134 static void gtk_scale_button_set_orientation_private (GtkScaleButton *button,
 135                                                       GtkOrientation  orientation);
 136 static gboolean gtk_scale_button_scroll         (GtkWidget           *widget,
 137                                                  GdkEventScroll      *event);
 138 static void gtk_scale_button_screen_changed     (GtkWidget           *widget,
 139                                                  GdkScreen           *previous_screen);
 140 static gboolean gtk_scale_button_press          (GtkWidget           *widget,
 141                                                  GdkEventButton      *event);
 142 static gboolean gtk_scale_button_key_release    (GtkWidget           *widget,
 143                                                  GdkEventKey         *event);
 144 static void     gtk_scale_button_popup          (GtkWidget           *widget);
 145 static void     gtk_scale_button_popdown        (GtkWidget           *widget);
 146 static gboolean cb_dock_button_press            (GtkWidget           *widget,
 147                                                  GdkEventButton      *event,
 148                                                  gpointer             user_data);
 149 static gboolean cb_dock_key_release             (GtkWidget           *widget,
 150                                                  GdkEventKey         *event,
 151                                                  gpointer             user_data);
 152 static gboolean cb_button_press                 (GtkWidget           *widget,
 153                                                  GdkEventButton      *event,
 154                                                  gpointer             user_data);
 155 static gboolean cb_button_release               (GtkWidget           *widget,
 156                                                  GdkEventButton      *event,
 157                                                  gpointer             user_data);
 158 static void cb_dock_grab_notify                 (GtkWidget           *widget,
 159                                                  gboolean             was_grabbed,
 160                                                  gpointer             user_data);
 161 static gboolean cb_dock_grab_broken_event       (GtkWidget           *widget,
 162                                                  gboolean             was_grabbed,
 163                                                  gpointer             user_data);
 164 static void cb_scale_grab_notify                (GtkWidget           *widget,
 165                                                  gboolean             was_grabbed,
 166                                                  gpointer             user_data);
 167 static void gtk_scale_button_update_icon        (GtkScaleButton      *button);
 168 static void gtk_scale_button_scale_value_changed(GtkRange            *range);
 169
 170 /* see below for scale definitions */
 171 static GtkWidget *gtk_scale_button_scale_new    (GtkScaleButton      *button);
 172
 173 G_DEFINE_TYPE_WITH_CODE (GtkScaleButton, gtk_scale_button, GTK_TYPE_BUTTON,
 174                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 175                                                 NULL))
 176
 177 static guint signals[LAST_SIGNAL] = { 0, };
 178
 179 static void
 180 gtk_scale_button_class_init (GtkScaleButtonClass *klass)
 181 {
 182   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 183   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 184   GtkBindingSet *binding_set;
 185
 186   g_type_class_add_private (klass, sizeof (GtkScaleButtonPrivate));
 187
 188   gobject_class->constructor = gtk_scale_button_constructor;
 189   gobject_class->finalize = gtk_scale_button_finalize;
 190   gobject_class->dispose = gtk_scale_button_dispose;
 191   gobject_class->set_property = gtk_scale_button_set_property;
 192   gobject_class->get_property = gtk_scale_button_get_property;
 193
 194   widget_class->button_press_event = gtk_scale_button_press;
 195   widget_class->key_release_event = gtk_scale_button_key_release;
 196   widget_class->scroll_event = gtk_scale_button_scroll;
 197   widget_class->screen_changed = gtk_scale_button_screen_changed;
 198
 199   /**
 200    * GtkScaleButton:orientation:
 201    *
 202    * The orientation of the #GtkScaleButton's popup window.
 203    *
 204    * Note that since GTK+ 2.16, #GtkScaleButton implements the
 205    * #GtkOrientable interface which has its own @orientation
 206    * property. However we redefine the property here in order to
 207    * override its default horizontal orientation.
 208    *
 209    * Since: 2.14
 210    **/
 211   g_object_class_override_property (gobject_class,
 212                                     PROP_ORIENTATION,
 213                                     "orientation");
 214
 215   g_object_class_install_property (gobject_class,
 216                                    PROP_VALUE,
 217                                    g_param_spec_double ("value",
 218                                                         P_("Value"),
 219                                                         P_("The value of the scale"),
 220                                                         -G_MAXDOUBLE,
 221                                                         G_MAXDOUBLE,
 222                                                         0,
 223                                                         GTK_PARAM_READWRITE));
 224
 225   g_object_class_install_property (gobject_class,
 226                                    PROP_SIZE,
 227                                    g_param_spec_enum ("size",
 228                                                       P_("Icon size"),
 229                                                       P_("The icon size"),
 230                                                       GTK_TYPE_ICON_SIZE,
 231                                                       GTK_ICON_SIZE_SMALL_TOOLBAR,
 232                                                       GTK_PARAM_READWRITE));
 233
 234   g_object_class_install_property (gobject_class,
 235                                    PROP_ADJUSTMENT,
 236                                    g_param_spec_object ("adjustment",
 237                                                         P_("Adjustment"),
 238                                                         P_("The GtkAdjustment that contains the current value of this scale button object"),
 239                                                         GTK_TYPE_ADJUSTMENT,
 240                                                         GTK_PARAM_READWRITE));
 241
 242   /**
 243    * GtkScaleButton:icons:
 244    *
 245    * The names of the icons to be used by the scale button.
 246    * The first item in the array will be used in the button
 247    * when the current value is the lowest value, the second
 248    * item for the highest value. All the subsequent icons will
 249    * be used for all the other values, spread evenly over the
 250    * range of values.
 251    *
 252    * If there's only one icon name in the @icons array, it will
 253    * be used for all the values. If only two icon names are in
 254    * the @icons array, the first one will be used for the bottom
 255    * 50% of the scale, and the second one for the top 50%.
 256    *
 257    * It is recommended to use at least 3 icons so that the
 258    * #GtkScaleButton reflects the current value of the scale
 259    * better for the users.
 260    *
 261    * Since: 2.12
 262    */
 263   g_object_class_install_property (gobject_class,
 264                                    PROP_ICONS,
 265                                    g_param_spec_boxed ("icons",
 266                                                        P_("Icons"),
 267                                                        P_("List of icon names"),
 268                                                        G_TYPE_STRV,
 269                                                        GTK_PARAM_READWRITE));
 270
 271   /**
 272    * GtkScaleButton::value-changed:
 273    * @button: the object which received the signal
 274    * @value: the new value
 275    *
 276    * The ::value-changed signal is emitted when the value field has
 277    * changed.
 278    *
 279    * Since: 2.12
 280    */
 281   signals[VALUE_CHANGED] =
 282     g_signal_new (I_("value-changed"),
 283                   G_TYPE_FROM_CLASS (klass),
 284                   G_SIGNAL_RUN_LAST,
 285                   G_STRUCT_OFFSET (GtkScaleButtonClass, value_changed),
 286                   NULL, NULL,
 287                   _gtk_marshal_VOID__DOUBLE,
 288                   G_TYPE_NONE, 1, G_TYPE_DOUBLE);
 289
 290   /**
 291    * GtkScaleButton::popup:
 292    * @button: the object which received the signal
 293    *
 294    * The ::popup signal is a
 295    * <link linkend="keybinding-signals">keybinding signal</link>
 296    * which gets emitted to popup the scale widget.
 297    *
 298    * The default bindings for this signal are Space, Enter and Return.
 299    *
 300    * Since: 2.12
 301    */
 302   signals[POPUP] =
 303     g_signal_new_class_handler (I_("popup"),
 304                                 G_OBJECT_CLASS_TYPE (klass),
 305                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 306                                 G_CALLBACK (gtk_scale_button_popup),
 307                                 NULL, NULL,
 308                                 g_cclosure_marshal_VOID__VOID,
 309                                 G_TYPE_NONE, 0);
 310
 311   /**
 312    * GtkScaleButton::popdown:
 313    * @button: the object which received the signal
 314    *
 315    * The ::popdown signal is a
 316    * <link linkend="keybinding-signals">keybinding signal</link>
 317    * which gets emitted to popdown the scale widget.
 318    *
 319    * The default binding for this signal is Escape.
 320    *
 321    * Since: 2.12
 322    */
 323   signals[POPDOWN] =
 324     g_signal_new_class_handler (I_("popdown"),
 325                                 G_OBJECT_CLASS_TYPE (klass),
 326                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 327                                 G_CALLBACK (gtk_scale_button_popdown),
 328                                 NULL, NULL,
 329                                 g_cclosure_marshal_VOID__VOID,
 330                                 G_TYPE_NONE, 0);
 331
 332   /* Key bindings */
 333   binding_set = gtk_binding_set_by_class (widget_class);
 334
 335   gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, 0,
 336                                 "popup", 0);
 337   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Space, 0,
 338                                 "popup", 0);
 339   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Return, 0,
 340                                 "popup", 0);
 341   gtk_binding_entry_add_signal (binding_set, GDK_KEY_ISO_Enter, 0,
 342                                 "popup", 0);
 343   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Enter, 0,
 344                                 "popup", 0);
 345   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0,
 346                                 "popdown", 0);
 347
 348   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCALE_BUTTON_ACCESSIBLE);
 349 }
 350
 351 static void
 352 gtk_scale_button_init (GtkScaleButton *button)
 353 {
 354   GtkScaleButtonPrivate *priv;
 355   GtkWidget *frame;
 356
 357   button->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (button,
 358                                                      GTK_TYPE_SCALE_BUTTON,
 359                                                      GtkScaleButtonPrivate);
 360
 361   priv->timeout = FALSE;
 362   priv->click_id = 0;
 363   priv->click_timeout = CLICK_TIMEOUT;
 364   priv->orientation = GTK_ORIENTATION_VERTICAL;
 365
 366   gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
 367   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 368
 369   /* image */
 370   priv->image = gtk_image_new ();
 371   gtk_container_add (GTK_CONTAINER (button), priv->image);
 372   gtk_widget_show_all (priv->image);
 373
 374   /* window */
 375   priv->dock = gtk_window_new (GTK_WINDOW_POPUP);
 376   gtk_widget_set_name (priv->dock, "gtk-scalebutton-popup-window");
 377   g_signal_connect (priv->dock, "button-press-event",
 378                     G_CALLBACK (cb_dock_button_press), button);
 379   g_signal_connect (priv->dock, "key-release-event",
 380                     G_CALLBACK (cb_dock_key_release), button);
 381   g_signal_connect (priv->dock, "grab-notify",
 382                     G_CALLBACK (cb_dock_grab_notify), button);
 383   g_signal_connect (priv->dock, "grab-broken-event",
 384                     G_CALLBACK (cb_dock_grab_broken_event), button);
 385   gtk_window_set_decorated (GTK_WINDOW (priv->dock), FALSE);
 386
 387   /* frame */
 388   frame = gtk_frame_new (NULL);
 389   gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
 390   gtk_container_add (GTK_CONTAINER (priv->dock), frame);
 391
 392   /* box for scale and +/- buttons */
 393   priv->box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
 394   gtk_container_add (GTK_CONTAINER (frame), priv->box);
 395
 396   /* + */
 397   priv->plus_button = gtk_button_new_with_label ("+");
 398   gtk_button_set_relief (GTK_BUTTON (priv->plus_button), GTK_RELIEF_NONE);
 399   g_signal_connect (priv->plus_button, "button-press-event",
 400                     G_CALLBACK (cb_button_press), button);
 401   g_signal_connect (priv->plus_button, "button-release-event",
 402                     G_CALLBACK (cb_button_release), button);
 403   gtk_box_pack_start (GTK_BOX (priv->box), priv->plus_button, FALSE, FALSE, 0);
 404
 405   /* - */
 406   priv->minus_button = gtk_button_new_with_label ("-");
 407   gtk_button_set_relief (GTK_BUTTON (priv->minus_button), GTK_RELIEF_NONE);
 408   g_signal_connect (priv->minus_button, "button-press-event",
 409                    G_CALLBACK (cb_button_press), button);
 410   g_signal_connect (priv->minus_button, "button-release-event",
 411                     G_CALLBACK (cb_button_release), button);
 412   gtk_box_pack_end (GTK_BOX (priv->box), priv->minus_button, FALSE, FALSE, 0);
 413
 414   priv->adjustment = gtk_adjustment_new (0.0, 0.0, 100.0, 2, 20, 0);
 415   g_object_ref_sink (priv->adjustment);
 416
 417   /* the scale */
 418   priv->scale = gtk_scale_button_scale_new (button);
 419   gtk_container_add (GTK_CONTAINER (priv->box), priv->scale);
 420
 421   gtk_widget_add_events (GTK_WIDGET (button), GDK_SCROLL_MASK);
 422 }
 423
 424 static GObject *
 425 gtk_scale_button_constructor (GType                  type,
 426                               guint                  n_construct_properties,
 427                               GObjectConstructParam *construct_params)
 428 {
 429   GObject *object;
 430   GtkScaleButton *button;
 431   GtkScaleButtonPrivate *priv;
 432
 433   object = G_OBJECT_CLASS (gtk_scale_button_parent_class)->constructor (type, n_construct_properties, construct_params);
 434
 435   button = GTK_SCALE_BUTTON (object);
 436
 437   priv = button->priv;
 438
 439   /* set button text and size */
 440   priv->size = GTK_ICON_SIZE_SMALL_TOOLBAR;
 441   gtk_scale_button_update_icon (button);
 442
 443   return object;
 444 }
 445
 446 static void
 447 gtk_scale_button_set_property (GObject       *object,
 448                                guint          prop_id,
 449                                const GValue  *value,
 450                                GParamSpec    *pspec)
 451 {
 452   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 453
 454   switch (prop_id)
 455     {
 456     case PROP_ORIENTATION:
 457       gtk_scale_button_set_orientation_private (button, g_value_get_enum (value));
 458       break;
 459     case PROP_VALUE:
 460       gtk_scale_button_set_value (button, g_value_get_double (value));
 461       break;
 462     case PROP_SIZE:
 463       {
 464         GtkIconSize size;
 465         size = g_value_get_enum (value);
 466         if (button->priv->size != size)
 467           {
 468             button->priv->size = size;
 469             gtk_scale_button_update_icon (button);
 470           }
 471       }
 472       break;
 473     case PROP_ADJUSTMENT:
 474       gtk_scale_button_set_adjustment (button, g_value_get_object (value));
 475       break;
 476     case PROP_ICONS:
 477       gtk_scale_button_set_icons (button,
 478                                   (const gchar **)g_value_get_boxed (value));
 479       break;
 480     default:
 481       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 482       break;
 483     }
 484 }
 485
 486 static void
 487 gtk_scale_button_get_property (GObject     *object,
 488                                guint        prop_id,
 489                                GValue      *value,
 490                                GParamSpec  *pspec)
 491 {
 492   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 493   GtkScaleButtonPrivate *priv = button->priv;
 494
 495   switch (prop_id)
 496     {
 497     case PROP_ORIENTATION:
 498       g_value_set_enum (value, priv->orientation);
 499       break;
 500     case PROP_VALUE:
 501       g_value_set_double (value, gtk_scale_button_get_value (button));
 502       break;
 503     case PROP_SIZE:
 504       g_value_set_enum (value, priv->size);
 505       break;
 506     case PROP_ADJUSTMENT:
 507       g_value_set_object (value, gtk_scale_button_get_adjustment (button));
 508       break;
 509     case PROP_ICONS:
 510       g_value_set_boxed (value, priv->icon_list);
 511       break;
 512     default:
 513       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 514       break;
 515     }
 516 }
 517
 518 static void
 519 gtk_scale_button_finalize (GObject *object)
 520 {
 521   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 522   GtkScaleButtonPrivate *priv = button->priv;
 523
 524   if (priv->icon_list)
 525     {
 526       g_strfreev (priv->icon_list);
 527       priv->icon_list = NULL;
 528     }
 529
 530   if (priv->adjustment)
 531     {
 532       g_object_unref (priv->adjustment);
 533       priv->adjustment = NULL;
 534     }
 535
 536   G_OBJECT_CLASS (gtk_scale_button_parent_class)->finalize (object);
 537 }
 538
 539 static void
 540 gtk_scale_button_dispose (GObject *object)
 541 {
 542   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 543   GtkScaleButtonPrivate *priv = button->priv;
 544
 545   if (priv->dock)
 546     {
 547       gtk_widget_destroy (priv->dock);
 548       priv->dock = NULL;
 549     }
 550
 551   if (priv->click_id != 0)
 552     {
 553       g_source_remove (priv->click_id);
 554       priv->click_id = 0;
 555     }
 556
 557   G_OBJECT_CLASS (gtk_scale_button_parent_class)->dispose (object);
 558 }
 559
 560 /**
 561  * gtk_scale_button_new:
 562  * @size: (type int): a stock icon size
 563  * @min: the minimum value of the scale (usually 0)
 564  * @max: the maximum value of the scale (usually 100)
 565  * @step: the stepping of value when a scroll-wheel event,
 566  *        or up/down arrow event occurs (usually 2)
 567  * @icons: (allow-none) (array zero-terminated=1): a %NULL-terminated
 568  *         array of icon names, or %NULL if you want to set the list
 569  *         later with gtk_scale_button_set_icons()
 570  *
 571  * Creates a #GtkScaleButton, with a range between @min and @max, with
 572  * a stepping of @step.
 573  *
 574  * Return value: a new #GtkScaleButton
 575  *
 576  * Since: 2.12
 577  */
 578 GtkWidget *
 579 gtk_scale_button_new (GtkIconSize   size,
 580                       gdouble       min,
 581                       gdouble       max,
 582                       gdouble       step,
 583                       const gchar **icons)
 584 {
 585   GtkScaleButton *button;
 586   GtkAdjustment *adjustment;
 587
 588   adjustment = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
 589
 590   button = g_object_new (GTK_TYPE_SCALE_BUTTON,
 591                          "adjustment", adjustment,
 592                          "icons", icons,
 593                          "size", size,
 594                          NULL);
 595
 596   return GTK_WIDGET (button);
 597 }
 598
 599 /**
 600  * gtk_scale_button_get_value:
 601  * @button: a #GtkScaleButton
 602  *
 603  * Gets the current value of the scale button.
 604  *
 605  * Return value: current value of the scale button
 606  *
 607  * Since: 2.12
 608  */
 609 gdouble
 610 gtk_scale_button_get_value (GtkScaleButton * button)
 611 {
 612   GtkScaleButtonPrivate *priv;
 613
 614   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0);
 615
 616   priv = button->priv;
 617
 618   return gtk_adjustment_get_value (priv->adjustment);
 619 }
 620
 621 /**
 622  * gtk_scale_button_set_value:
 623  * @button: a #GtkScaleButton
 624  * @value: new value of the scale button
 625  *
 626  * Sets the current value of the scale; if the value is outside
 627  * the minimum or maximum range values, it will be clamped to fit
 628  * inside them. The scale button emits the #GtkScaleButton::value-changed
 629  * signal if the value changes.
 630  *
 631  * Since: 2.12
 632  */
 633 void
 634 gtk_scale_button_set_value (GtkScaleButton *button,
 635                             gdouble         value)
 636 {
 637   GtkScaleButtonPrivate *priv;
 638
 639   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 640
 641   priv = button->priv;
 642
 643   gtk_range_set_value (GTK_RANGE (priv->scale), value);
 644 }
 645
 646 /**
 647  * gtk_scale_button_set_icons:
 648  * @button: a #GtkScaleButton
 649  * @icons: (array zero-terminated=1): a %NULL-terminated array of icon names
 650  *
 651  * Sets the icons to be used by the scale button.
 652  * For details, see the #GtkScaleButton:icons property.
 653  *
 654  * Since: 2.12
 655  */
 656 void
 657 gtk_scale_button_set_icons (GtkScaleButton  *button,
 658                             const gchar    **icons)
 659 {
 660   GtkScaleButtonPrivate *priv;
 661   gchar **tmp;
 662
 663   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 664
 665   priv = button->priv;
 666
 667   tmp = priv->icon_list;
 668   priv->icon_list = g_strdupv ((gchar **) icons);
 669   g_strfreev (tmp);
 670   gtk_scale_button_update_icon (button);
 671
 672   g_object_notify (G_OBJECT (button), "icons");
 673 }
 674
 675 /**
 676  * gtk_scale_button_get_adjustment:
 677  * @button: a #GtkScaleButton
 678  *
 679  * Gets the #GtkAdjustment associated with the #GtkScaleButton's scale.
 680  * See gtk_range_get_adjustment() for details.
 681  *
 682  * Returns: (transfer none): the adjustment associated with the scale
 683  *
 684  * Since: 2.12
 685  */
 686 GtkAdjustment*
 687 gtk_scale_button_get_adjustment (GtkScaleButton *button)
 688 {
 689   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 690
 691   return button->priv->adjustment;
 692 }
 693
 694 /**
 695  * gtk_scale_button_set_adjustment:
 696  * @button: a #GtkScaleButton
 697  * @adjustment: a #GtkAdjustment
 698  *
 699  * Sets the #GtkAdjustment to be used as a model
 700  * for the #GtkScaleButton's scale.
 701  * See gtk_range_set_adjustment() for details.
 702  *
 703  * Since: 2.12
 704  */
 705 void
 706 gtk_scale_button_set_adjustment (GtkScaleButton *button,
 707                                  GtkAdjustment  *adjustment)
 708 {
 709   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 710
 711   if (!adjustment)
 712     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 713   else
 714     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 715
 716   if (button->priv->adjustment != adjustment)
 717     {
 718       if (button->priv->adjustment)
 719         g_object_unref (button->priv->adjustment);
 720       button->priv->adjustment = g_object_ref_sink (adjustment);
 721
 722       if (button->priv->scale)
 723         gtk_range_set_adjustment (GTK_RANGE (button->priv->scale), adjustment);
 724
 725       g_object_notify (G_OBJECT (button), "adjustment");
 726     }
 727 }
 728
 729 /**
 730  * gtk_scale_button_get_plus_button:
 731  * @button: a #GtkScaleButton
 732  *
 733  * Retrieves the plus button of the #GtkScaleButton.
 734  *
 735  * Returns: (transfer none): the plus button of the #GtkScaleButton
 736  *
 737  * Since: 2.14
 738  */
 739 GtkWidget *
 740 gtk_scale_button_get_plus_button (GtkScaleButton *button)
 741 {
 742   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 743
 744   return button->priv->plus_button;
 745 }
 746
 747 /**
 748  * gtk_scale_button_get_minus_button:
 749  * @button: a #GtkScaleButton
 750  *
 751  * Retrieves the minus button of the #GtkScaleButton.
 752  *
 753  * Returns: (transfer none): the minus button of the #GtkScaleButton
 754  *
 755  * Since: 2.14
 756  */
 757 GtkWidget *
 758 gtk_scale_button_get_minus_button (GtkScaleButton *button)
 759 {
 760   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 761
 762   return button->priv->minus_button;
 763 }
 764
 765 /**
 766  * gtk_scale_button_get_popup:
 767  * @button: a #GtkScaleButton
 768  *
 769  * Retrieves the popup of the #GtkScaleButton.
 770  *
 771  * Returns: (transfer none): the popup of the #GtkScaleButton
 772  *
 773  * Since: 2.14
 774  */
 775 GtkWidget *
 776 gtk_scale_button_get_popup (GtkScaleButton *button)
 777 {
 778   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 779
 780   return button->priv->dock;
 781 }
 782
 783 static void
 784 gtk_scale_button_set_orientation_private (GtkScaleButton *button,
 785                                           GtkOrientation  orientation)
 786 {
 787   GtkScaleButtonPrivate *priv = button->priv;
 788
 789   if (orientation != priv->orientation)
 790     {
 791       priv->orientation = orientation;
 792
 793       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->box),
 794                                       orientation);
 795       gtk_container_child_set (GTK_CONTAINER (priv->box),
 796                                priv->plus_button,
 797                                "pack-type",
 798                                orientation == GTK_ORIENTATION_VERTICAL ?
 799                                GTK_PACK_START : GTK_PACK_END,
 800                                NULL);
 801       gtk_container_child_set (GTK_CONTAINER (priv->box),
 802                                priv->minus_button,
 803                                "pack-type",
 804                                orientation == GTK_ORIENTATION_VERTICAL ?
 805                                GTK_PACK_END : GTK_PACK_START,
 806                                NULL);
 807
 808       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->scale),
 809                                       orientation);
 810
 811       if (orientation == GTK_ORIENTATION_VERTICAL)
 812         {
 813           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 814                                        -1, SCALE_SIZE);
 815           gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
 816         }
 817       else
 818         {
 819           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 820                                        SCALE_SIZE, -1);
 821           gtk_range_set_inverted (GTK_RANGE (priv->scale), FALSE);
 822         }
 823
 824       /* FIXME: without this, the popup window appears as a square
 825        * after changing the orientation
 826        */
 827       gtk_window_resize (GTK_WINDOW (priv->dock), 1, 1);
 828
 829       g_object_notify (G_OBJECT (button), "orientation");
 830     }
 831 }
 832
 833 /*
 834  * button callbacks.
 835  */
 836
 837 static gboolean
 838 gtk_scale_button_scroll (GtkWidget      *widget,
 839                          GdkEventScroll *event)
 840 {
 841   GtkScaleButton *button;
 842   GtkScaleButtonPrivate *priv;
 843   GtkAdjustment *adjustment;
 844   gdouble d;
 845
 846   button = GTK_SCALE_BUTTON (widget);
 847   priv = button->priv;
 848   adjustment = priv->adjustment;
 849
 850   if (event->type != GDK_SCROLL)
 851     return FALSE;
 852
 853   d = gtk_scale_button_get_value (button);
 854   if (event->direction == GDK_SCROLL_UP)
 855     {
 856       d += gtk_adjustment_get_step_increment (adjustment);
 857       if (d > gtk_adjustment_get_upper (adjustment))
 858         d = gtk_adjustment_get_upper (adjustment);
 859     }
 860   else
 861     {
 862       d -= gtk_adjustment_get_step_increment (adjustment);
 863       if (d < gtk_adjustment_get_lower (adjustment))
 864         d = gtk_adjustment_get_lower (adjustment);
 865     }
 866   gtk_scale_button_set_value (button, d);
 867
 868   return TRUE;
 869 }
 870
 871 static void
 872 gtk_scale_button_screen_changed (GtkWidget *widget,
 873                                  GdkScreen *previous_screen)
 874 {
 875   GtkScaleButton *button = (GtkScaleButton *) widget;
 876   GtkScaleButtonPrivate *priv;
 877   GdkScreen *screen;
 878   GValue value = G_VALUE_INIT;
 879
 880   if (gtk_widget_has_screen (widget) == FALSE)
 881     return;
 882
 883   priv = button->priv;
 884
 885   screen = gtk_widget_get_screen (widget);
 886   g_value_init (&value, G_TYPE_INT);
 887   if (gdk_screen_get_setting (screen,
 888                               "gtk-double-click-time",
 889                               &value) == FALSE)
 890     {
 891       priv->click_timeout = CLICK_TIMEOUT;
 892       return;
 893     }
 894
 895   priv->click_timeout = g_value_get_int (&value);
 896 }
 897
 898 static gboolean
 899 gtk_scale_popup (GtkWidget *widget,
 900                  GdkEvent  *event,
 901                  guint32    time)
 902 {
 903   GtkAllocation allocation, dock_allocation, scale_allocation;
 904   GtkScaleButton *button;
 905   GtkScaleButtonPrivate *priv;
 906   GtkAdjustment *adjustment;
 907   gint x, y, m, dx, dy, sx, sy, startoff;
 908   gint min_slider_size;
 909   gdouble v;
 910   GdkScreen *screen;
 911   gboolean is_moved;
 912   GdkDevice *device, *keyboard, *pointer;
 913
 914   is_moved = FALSE;
 915   button = GTK_SCALE_BUTTON (widget);
 916   priv = button->priv;
 917   adjustment = priv->adjustment;
 918
 919   screen = gtk_widget_get_screen (widget);
 920   gtk_widget_get_allocation (widget, &allocation);
 921
 922   /* position roughly */
 923   gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
 924
 925   gdk_window_get_origin (gtk_widget_get_window (widget),
 926                          &x, &y);
 927   x += allocation.x;
 928   y += allocation.y;
 929
 930   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 931     gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
 932   else
 933     gtk_window_move (GTK_WINDOW (priv->dock), x - (SCALE_SIZE / 2), y);
 934
 935   gtk_widget_show_all (priv->dock);
 936
 937   gdk_window_get_origin (gtk_widget_get_window (priv->dock),
 938                          &dx, &dy);
 939   gtk_widget_get_allocation (priv->dock, &dock_allocation);
 940   dx += dock_allocation.x;
 941   dy += dock_allocation.y;
 942
 943
 944   gdk_window_get_origin (gtk_widget_get_window (priv->scale),
 945                          &sx, &sy);
 946   gtk_widget_get_allocation (priv->scale, &scale_allocation);
 947   sx += scale_allocation.x;
 948   sy += scale_allocation.y;
 949
 950   priv->timeout = TRUE;
 951
 952   /* position (needs widget to be shown already) */
 953   v = gtk_scale_button_get_value (button) / (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment));
 954   min_slider_size = gtk_range_get_min_slider_size (GTK_RANGE (priv->scale));
 955
 956   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 957     {
 958       startoff = sy - dy;
 959
 960       x += (allocation.width - dock_allocation.width) / 2;
 961       y -= startoff;
 962       y -= min_slider_size / 2;
 963       m = scale_allocation.height - min_slider_size;
 964       y -= m * (1.0 - v);
 965     }
 966   else
 967     {
 968       startoff = sx - dx;
 969
 970       x -= startoff;
 971       y += (allocation.height - dock_allocation.height) / 2;
 972       x -= min_slider_size / 2;
 973       m = scale_allocation.width - min_slider_size;
 974       x -= m * v;
 975     }
 976
 977   /* Make sure the dock stays inside the monitor */
 978   if (event->type == GDK_BUTTON_PRESS)
 979     {
 980       GtkAllocation d_allocation;
 981       int monitor;
 982       GdkEventButton *button_event = (GdkEventButton *) event;
 983       GdkRectangle rect;
 984       GtkWidget *d;
 985
 986       d = GTK_WIDGET (priv->dock);
 987       monitor = gdk_screen_get_monitor_at_point (screen,
 988                                                  button_event->x_root,
 989                                                  button_event->y_root);
 990       gdk_screen_get_monitor_workarea (screen, monitor, &rect);
 991
 992       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 993         y += button_event->y;
 994       else
 995         x += button_event->x;
 996
 997       /* Move the dock, but set is_moved so we
 998        * don't forward the first click later on,
 999        * as it could make the scale go to the bottom */
1000       gtk_widget_get_allocation (d, &d_allocation);
1001       if (y < rect.y)
1002         {
1003           y = rect.y;
1004           is_moved = TRUE;
1005         }
1006       else if (y + d_allocation.height > rect.height + rect.y)
1007         {
1008           y = rect.y + rect.height - d_allocation.height;
1009           is_moved = TRUE;
1010         }
1011
1012       if (x < rect.x)
1013         {
1014           x = rect.x;
1015           is_moved = TRUE;
1016         }
1017       else if (x + d_allocation.width > rect.width + rect.x)
1018         {
1019           x = rect.x + rect.width - d_allocation.width;
1020           is_moved = TRUE;
1021         }
1022     }
1023
1024   gtk_window_move (GTK_WINDOW (priv->dock), x, y);
1025
1026   if (event->type == GDK_BUTTON_PRESS)
1027     GTK_WIDGET_CLASS (gtk_scale_button_parent_class)->button_press_event (widget, (GdkEventButton *) event);
1028
1029   device = gdk_event_get_device (event);
1030
1031   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
1032     {
1033       keyboard = device;
1034       pointer = gdk_device_get_associated_device (device);
1035     }
1036   else
1037     {
1038       pointer = device;
1039       keyboard = gdk_device_get_associated_device (device);
1040     }
1041
1042   /* grab focus */
1043   gtk_device_grab_add (priv->dock, pointer, TRUE);
1044
1045   if (gdk_device_grab (pointer, gtk_widget_get_window (priv->dock),
1046                        GDK_OWNERSHIP_WINDOW, TRUE,
1047                        GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1048                        GDK_POINTER_MOTION_MASK, NULL, time) != GDK_GRAB_SUCCESS)
1049     {
1050       gtk_device_grab_remove (priv->dock, pointer);
1051       gtk_widget_hide (priv->dock);
1052       return FALSE;
1053     }
1054
1055   if (gdk_device_grab (keyboard, gtk_widget_get_window (priv->dock),
1056                        GDK_OWNERSHIP_WINDOW, TRUE,
1057                        GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
1058                        NULL, time) != GDK_GRAB_SUCCESS)
1059     {
1060       gdk_device_ungrab (pointer, time);
1061       gtk_device_grab_remove (priv->dock, pointer);
1062       gtk_widget_hide (priv->dock);
1063       return FALSE;
1064     }
1065
1066   gtk_widget_grab_focus (priv->dock);
1067   priv->grab_keyboard = keyboard;
1068   priv->grab_pointer = pointer;
1069
1070   if (event->type == GDK_BUTTON_PRESS && !is_moved)
1071     {
1072       GdkEventButton *e;
1073       GdkEventButton *button_event = (GdkEventButton *) event;
1074
1075       /* forward event to the slider */
1076       e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1077       e->window = gtk_widget_get_window (priv->scale);
1078
1079       /* position: the X position isn't relevant, halfway will work just fine.
1080        * The vertical position should be *exactly* in the middle of the slider
1081        * of the scale; if we don't do that correctly, it'll move from its current
1082        * position, which means a position change on-click, which is bad.
1083        */
1084       gtk_widget_get_allocation (priv->scale, &scale_allocation);
1085       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1086         {
1087           e->x = scale_allocation.width / 2;
1088           m = scale_allocation.height - min_slider_size;
1089           e->y = ((1.0 - v) * m) + min_slider_size / 2;
1090         }
1091       else
1092         {
1093           e->y = scale_allocation.height / 2;
1094           m = scale_allocation.width - min_slider_size;
1095           e->x = (v * m) + min_slider_size / 2;
1096         }
1097
1098       gtk_widget_event (priv->scale, (GdkEvent *) e);
1099       e->window = button_event->window;
1100       gdk_event_free ((GdkEvent *) e);
1101     }
1102
1103   gtk_widget_grab_focus (priv->scale);
1104
1105   priv->pop_time = time;
1106
1107   return TRUE;
1108 }
1109
1110 static gboolean
1111 gtk_scale_button_press (GtkWidget      *widget,
1112                         GdkEventButton *event)
1113 {
1114   return gtk_scale_popup (widget, (GdkEvent *) event, event->time);
1115 }
1116
1117 static void
1118 gtk_scale_button_popup (GtkWidget *widget)
1119 {
1120   GdkEvent *ev;
1121
1122   /* This is a callback for a keybinding signal,
1123    * current event should  be the key event that
1124    * triggered it.
1125    */
1126   ev = gtk_get_current_event ();
1127
1128   if (ev->type != GDK_KEY_PRESS &&
1129       ev->type != GDK_KEY_RELEASE)
1130     {
1131       gdk_event_free (ev);
1132       ev = gdk_event_new (GDK_KEY_RELEASE);
1133       ev->key.time = GDK_CURRENT_TIME;
1134     }
1135
1136   gtk_scale_popup (widget, ev, ev->key.time);
1137   gdk_event_free (ev);
1138 }
1139
1140 static gboolean
1141 gtk_scale_button_key_release (GtkWidget   *widget,
1142                               GdkEventKey *event)
1143 {
1144   return gtk_bindings_activate_event (G_OBJECT (widget), event);
1145 }
1146
1147 /* This is called when the grab is broken for
1148  * either the dock, or the scale itself */
1149 static void
1150 gtk_scale_button_grab_notify (GtkScaleButton *button,
1151                               gboolean        was_grabbed)
1152 {
1153   GtkScaleButtonPrivate *priv;
1154   GtkWidget *toplevel, *grab_widget;
1155   GtkWindowGroup *group;
1156
1157   priv = button->priv;
1158
1159   if (!priv->grab_pointer ||
1160       !gtk_widget_device_is_shadowed (GTK_WIDGET (button), priv->grab_pointer))
1161     return;
1162
1163   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
1164
1165   if (GTK_IS_WINDOW (toplevel))
1166     group = gtk_window_get_group (GTK_WINDOW (toplevel));
1167   else
1168     group = gtk_window_get_group (NULL);
1169
1170   grab_widget = gtk_window_group_get_current_device_grab (group, priv->grab_pointer);
1171
1172   if (grab_widget &&
1173       gtk_widget_is_ancestor (grab_widget, priv->dock))
1174     return;
1175
1176   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1177   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1178   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1179
1180   priv->grab_keyboard = NULL;
1181   priv->grab_pointer = NULL;
1182
1183   /* hide again */
1184   gtk_widget_hide (priv->dock);
1185   priv->timeout = FALSE;
1186 }
1187
1188 /*
1189  * +/- button callbacks.
1190  */
1191
1192 static gboolean
1193 cb_button_timeout (gpointer user_data)
1194 {
1195   GtkScaleButton *button;
1196   GtkScaleButtonPrivate *priv;
1197   GtkAdjustment *adjustment;
1198   gdouble val;
1199   gboolean res = TRUE;
1200
1201   button = GTK_SCALE_BUTTON (user_data);
1202   priv = button->priv;
1203
1204   if (priv->click_id == 0)
1205     return FALSE;
1206
1207   adjustment = priv->adjustment;
1208
1209   val = gtk_scale_button_get_value (button);
1210   val += priv->direction;
1211   if (val <= gtk_adjustment_get_lower (adjustment))
1212     {
1213       res = FALSE;
1214       val = gtk_adjustment_get_lower (adjustment);
1215     }
1216   else if (val > gtk_adjustment_get_upper (adjustment))
1217     {
1218       res = FALSE;
1219       val = gtk_adjustment_get_upper (adjustment);
1220     }
1221   gtk_scale_button_set_value (button, val);
1222
1223   if (!res)
1224     {
1225       g_source_remove (priv->click_id);
1226       priv->click_id = 0;
1227     }
1228
1229   return res;
1230 }
1231
1232 static gboolean
1233 cb_button_press (GtkWidget      *widget,
1234                  GdkEventButton *event,
1235                  gpointer        user_data)
1236 {
1237   GtkScaleButton *button;
1238   GtkScaleButtonPrivate *priv;
1239   GtkAdjustment *adjustment;
1240
1241   button = GTK_SCALE_BUTTON (user_data);
1242   priv = button->priv;
1243   adjustment = priv->adjustment;
1244
1245   if (priv->click_id != 0)
1246     g_source_remove (priv->click_id);
1247
1248   if (widget == priv->plus_button)
1249     priv->direction = fabs (gtk_adjustment_get_page_increment (adjustment));
1250   else
1251     priv->direction = - fabs (gtk_adjustment_get_page_increment (adjustment));
1252
1253   priv->click_id = gdk_threads_add_timeout (priv->click_timeout,
1254                                             cb_button_timeout,
1255                                             button);
1256   cb_button_timeout (button);
1257
1258   return TRUE;
1259 }
1260
1261 static gboolean
1262 cb_button_release (GtkWidget      *widget,
1263                    GdkEventButton *event,
1264                    gpointer        user_data)
1265 {
1266   GtkScaleButton *button;
1267   GtkScaleButtonPrivate *priv;
1268
1269   button = GTK_SCALE_BUTTON (user_data);
1270   priv = button->priv;
1271
1272   if (priv->click_id != 0)
1273     {
1274       g_source_remove (priv->click_id);
1275       priv->click_id = 0;
1276     }
1277
1278   return TRUE;
1279 }
1280
1281 static void
1282 cb_dock_grab_notify (GtkWidget *widget,
1283                      gboolean   was_grabbed,
1284                      gpointer   user_data)
1285 {
1286   GtkScaleButton *button = (GtkScaleButton *) user_data;
1287
1288   gtk_scale_button_grab_notify (button, was_grabbed);
1289 }
1290
1291 static gboolean
1292 cb_dock_grab_broken_event (GtkWidget *widget,
1293                            gboolean   was_grabbed,
1294                            gpointer   user_data)
1295 {
1296   GtkScaleButton *button = (GtkScaleButton *) user_data;
1297
1298   gtk_scale_button_grab_notify (button, FALSE);
1299
1300   return FALSE;
1301 }
1302
1303 /* Scale callbacks  */
1304
1305 static void
1306 gtk_scale_button_release_grab (GtkScaleButton *button,
1307                                GdkEventButton *event)
1308 {
1309   GdkEventButton *e;
1310   GtkScaleButtonPrivate *priv;
1311
1312   priv = button->priv;
1313
1314   /* ungrab focus */
1315   gdk_device_ungrab (priv->grab_keyboard, event->time);
1316   gdk_device_ungrab (priv->grab_pointer, event->time);
1317   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1318
1319   priv->grab_keyboard = NULL;
1320   priv->grab_pointer = NULL;
1321
1322   /* hide again */
1323   gtk_widget_hide (priv->dock);
1324   priv->timeout = FALSE;
1325
1326   e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1327   e->window = gtk_widget_get_window (GTK_WIDGET (button));
1328   e->type = GDK_BUTTON_RELEASE;
1329   gtk_widget_event (GTK_WIDGET (button), (GdkEvent *) e);
1330   e->window = event->window;
1331   gdk_event_free ((GdkEvent *) e);
1332 }
1333
1334 static gboolean
1335 cb_dock_button_press (GtkWidget      *widget,
1336                       GdkEventButton *event,
1337                       gpointer        user_data)
1338 {
1339   GtkScaleButton *button = GTK_SCALE_BUTTON (user_data);
1340
1341   if (event->type == GDK_BUTTON_PRESS)
1342     {
1343       gtk_scale_button_release_grab (button, event);
1344       return TRUE;
1345     }
1346
1347   return FALSE;
1348 }
1349
1350 static void
1351 gtk_scale_button_popdown (GtkWidget *widget)
1352 {
1353   GtkScaleButton *button;
1354   GtkScaleButtonPrivate *priv;
1355
1356   button = GTK_SCALE_BUTTON (widget);
1357   priv = button->priv;
1358
1359   /* ungrab focus */
1360   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1361   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1362   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1363
1364   priv->grab_keyboard = NULL;
1365   priv->grab_pointer = NULL;
1366
1367   /* hide again */
1368   gtk_widget_hide (priv->dock);
1369   priv->timeout = FALSE;
1370 }
1371
1372 static gboolean
1373 cb_dock_key_release (GtkWidget   *widget,
1374                      GdkEventKey *event,
1375                      gpointer     user_data)
1376 {
1377   if (event->keyval == GDK_KEY_Escape)
1378     {
1379       gtk_scale_button_popdown (GTK_WIDGET (user_data));
1380       return TRUE;
1381     }
1382
1383   if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
1384     {
1385       /* The popup hasn't managed the event, pass onto the button */
1386       gtk_bindings_activate_event (G_OBJECT (user_data), event);
1387     }
1388
1389   return TRUE;
1390 }
1391
1392 static void
1393 cb_scale_grab_notify (GtkWidget *widget,
1394                       gboolean   was_grabbed,
1395                       gpointer   user_data)
1396 {
1397   GtkScaleButton *button = (GtkScaleButton *) user_data;
1398
1399   gtk_scale_button_grab_notify (button, was_grabbed);
1400 }
1401
1402 /*
1403  * Scale stuff.
1404  */
1405
1406 #define GTK_TYPE_SCALE_BUTTON_SCALE    (_gtk_scale_button_scale_get_type ())
1407 #define GTK_SCALE_BUTTON_SCALE(obj)    (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON_SCALE, GtkScaleButtonScale))
1408 #define GTK_IS_SCALE_BUTTON_SCALE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SCALE_BUTTON_SCALE))
1409
1410 typedef struct _GtkScaleButtonScale
1411 {
1412   GtkScale parent_instance;
1413   GtkScaleButton *button;
1414 } GtkScaleButtonScale;
1415
1416 typedef struct _GtkScaleButtonScaleClass
1417 {
1418   GtkScaleClass parent_class;
1419 } GtkScaleButtonScaleClass;
1420
1421 static gboolean gtk_scale_button_scale_press   (GtkWidget      *widget,
1422                                                 GdkEventButton *event);
1423 static gboolean gtk_scale_button_scale_release (GtkWidget      *widget,
1424                                                 GdkEventButton *event);
1425
1426 GType           _gtk_scale_button_scale_get_type (void);
1427
1428 G_DEFINE_TYPE (GtkScaleButtonScale, _gtk_scale_button_scale, GTK_TYPE_SCALE)
1429
1430 static void
1431 _gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
1432 {
1433   GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
1434   GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
1435
1436   gtkwidget_class->button_press_event = gtk_scale_button_scale_press;
1437   gtkwidget_class->button_release_event = gtk_scale_button_scale_release;
1438   gtkrange_class->value_changed = gtk_scale_button_scale_value_changed;
1439 }
1440
1441 static void
1442 _gtk_scale_button_scale_init (GtkScaleButtonScale *scale)
1443 {
1444 }
1445
1446 static GtkWidget *
1447 gtk_scale_button_scale_new (GtkScaleButton *button)
1448 {
1449   GtkScaleButtonPrivate *priv = button->priv;
1450   GtkScaleButtonScale *scale;
1451
1452   scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE,
1453                         "orientation", priv->orientation,
1454                         "adjustment",  priv->adjustment,
1455                         "draw-value",  FALSE,
1456                         NULL);
1457
1458   scale->button = button;
1459
1460   g_signal_connect (scale, "grab-notify",
1461                     G_CALLBACK (cb_scale_grab_notify), button);
1462
1463   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1464     {
1465       gtk_widget_set_size_request (GTK_WIDGET (scale), -1, SCALE_SIZE);
1466       gtk_range_set_inverted (GTK_RANGE (scale), TRUE);
1467     }
1468   else
1469     {
1470       gtk_widget_set_size_request (GTK_WIDGET (scale), SCALE_SIZE, -1);
1471       gtk_range_set_inverted (GTK_RANGE (scale), FALSE);
1472     }
1473
1474   return GTK_WIDGET (scale);
1475 }
1476
1477 static gboolean
1478 gtk_scale_button_scale_press (GtkWidget      *widget,
1479                               GdkEventButton *event)
1480 {
1481   GtkScaleButtonPrivate *priv = GTK_SCALE_BUTTON_SCALE (widget)->button->priv;
1482
1483   /* the scale will grab input; if we have input grabbed, all goes
1484    * horribly wrong, so let's not do that.
1485    */
1486   gtk_device_grab_remove (priv->dock, event->device);
1487
1488   return GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_press_event (widget, event);
1489 }
1490
1491 static gboolean
1492 gtk_scale_button_scale_release (GtkWidget      *widget,
1493                                 GdkEventButton *event)
1494 {
1495   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (widget)->button;
1496   gboolean res;
1497
1498   if (button->priv->timeout)
1499     {
1500       /* if we did a quick click, leave the window open; else, hide it */
1501       if (event->time > button->priv->pop_time + button->priv->click_timeout)
1502         {
1503
1504           gtk_scale_button_release_grab (button, event);
1505           GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1506
1507           return TRUE;
1508         }
1509
1510       button->priv->timeout = FALSE;
1511     }
1512
1513   res = GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1514
1515   /* the scale will release input; right after that, we *have to* grab
1516    * it back so we can catch out-of-scale clicks and hide the popup,
1517    * so I basically want a g_signal_connect_after_always(), but I can't
1518    * find that, so we do this complex 'first-call-parent-then-do-actual-
1519    * action' thingy...
1520    */
1521   gtk_device_grab_add (button->priv->dock, event->device, TRUE);
1522
1523   return res;
1524 }
1525
1526 static void
1527 gtk_scale_button_update_icon (GtkScaleButton *button)
1528 {
1529   GtkScaleButtonPrivate *priv;
1530   GtkAdjustment *adjustment;
1531   gdouble value;
1532   const gchar *name;
1533   guint num_icons;
1534
1535   priv = button->priv;
1536
1537   if (!priv->icon_list || priv->icon_list[0] == '\0')
1538     {
1539       gtk_image_set_from_stock (GTK_IMAGE (priv->image),
1540                                 GTK_STOCK_MISSING_IMAGE,
1541                                 priv->size);
1542       return;
1543     }
1544
1545   num_icons = g_strv_length (priv->icon_list);
1546
1547   /* The 1-icon special case */
1548   if (num_icons == 1)
1549     {
1550       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1551                                     priv->icon_list[0],
1552                                     priv->size);
1553       return;
1554     }
1555
1556   adjustment = priv->adjustment;
1557   value = gtk_scale_button_get_value (button);
1558
1559   /* The 2-icons special case */
1560   if (num_icons == 2)
1561     {
1562       gdouble limit;
1563
1564       limit = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / 2 + gtk_adjustment_get_lower (adjustment);
1565       if (value < limit)
1566         name = priv->icon_list[0];
1567       else
1568         name = priv->icon_list[1];
1569
1570       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1571                                     name,
1572                                     priv->size);
1573       return;
1574     }
1575
1576   /* With 3 or more icons */
1577   if (value == gtk_adjustment_get_lower (adjustment))
1578     {
1579       name = priv->icon_list[0];
1580     }
1581   else if (value == gtk_adjustment_get_upper (adjustment))
1582     {
1583       name = priv->icon_list[1];
1584     }
1585   else
1586     {
1587       gdouble step;
1588       guint i;
1589
1590       step = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / (num_icons - 2);
1591       i = (guint) ((value - gtk_adjustment_get_lower (adjustment)) / step) + 2;
1592       g_assert (i < num_icons);
1593       name = priv->icon_list[i];
1594     }
1595
1596   gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1597                                 name,
1598                                 priv->size);
1599 }
1600
1601 static void
1602 gtk_scale_button_scale_value_changed (GtkRange *range)
1603 {
1604   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (range)->button;
1605   gdouble value;
1606
1607   value = gtk_range_get_value (range);
1608
1609   gtk_scale_button_update_icon (button);
1610
1611   g_signal_emit (button, signals[VALUE_CHANGED], 0, value);
1612   g_object_notify (G_OBJECT (button), "value");
1613 }