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