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, write to the
  25  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  26  * Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*
  30  * Modified by the GTK+ Team and others 2007.  See the AUTHORS
  31  * file for a list of people on the GTK+ Team.  See the ChangeLog
  32  * files for a list of changes.  These files are distributed with
  33  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  34  */
  35
  36 #include "config.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 "gtkbindings.h"
  46 #include "gtkframe.h"
  47 #include "gtkmain.h"
  48 #include "gtkmarshalers.h"
  49 #include "gtkorientable.h"
  50 #include "gtkprivate.h"
  51 #include "gtkscale.h"
  52 #include "gtkscalebutton.h"
  53 #include "gtkstock.h"
  54 #include "gtkvbox.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
 422 static GObject *
 423 gtk_scale_button_constructor (GType                  type,
 424                               guint                  n_construct_properties,
 425                               GObjectConstructParam *construct_params)
 426 {
 427   GObject *object;
 428   GtkScaleButton *button;
 429   GtkScaleButtonPrivate *priv;
 430
 431   object = G_OBJECT_CLASS (gtk_scale_button_parent_class)->constructor (type, n_construct_properties, construct_params);
 432
 433   button = GTK_SCALE_BUTTON (object);
 434
 435   priv = button->priv;
 436
 437   /* set button text and size */
 438   priv->size = GTK_ICON_SIZE_SMALL_TOOLBAR;
 439   gtk_scale_button_update_icon (button);
 440
 441   return object;
 442 }
 443
 444 static void
 445 gtk_scale_button_set_property (GObject       *object,
 446                                guint          prop_id,
 447                                const GValue  *value,
 448                                GParamSpec    *pspec)
 449 {
 450   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 451
 452   switch (prop_id)
 453     {
 454     case PROP_ORIENTATION:
 455       gtk_scale_button_set_orientation_private (button, g_value_get_enum (value));
 456       break;
 457     case PROP_VALUE:
 458       gtk_scale_button_set_value (button, g_value_get_double (value));
 459       break;
 460     case PROP_SIZE:
 461       {
 462         GtkIconSize size;
 463         size = g_value_get_enum (value);
 464         if (button->priv->size != size)
 465           {
 466             button->priv->size = size;
 467             gtk_scale_button_update_icon (button);
 468           }
 469       }
 470       break;
 471     case PROP_ADJUSTMENT:
 472       gtk_scale_button_set_adjustment (button, g_value_get_object (value));
 473       break;
 474     case PROP_ICONS:
 475       gtk_scale_button_set_icons (button,
 476                                   (const gchar **)g_value_get_boxed (value));
 477       break;
 478     default:
 479       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 480       break;
 481     }
 482 }
 483
 484 static void
 485 gtk_scale_button_get_property (GObject     *object,
 486                                guint        prop_id,
 487                                GValue      *value,
 488                                GParamSpec  *pspec)
 489 {
 490   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 491   GtkScaleButtonPrivate *priv = button->priv;
 492
 493   switch (prop_id)
 494     {
 495     case PROP_ORIENTATION:
 496       g_value_set_enum (value, priv->orientation);
 497       break;
 498     case PROP_VALUE:
 499       g_value_set_double (value, gtk_scale_button_get_value (button));
 500       break;
 501     case PROP_SIZE:
 502       g_value_set_enum (value, priv->size);
 503       break;
 504     case PROP_ADJUSTMENT:
 505       g_value_set_object (value, gtk_scale_button_get_adjustment (button));
 506       break;
 507     case PROP_ICONS:
 508       g_value_set_boxed (value, priv->icon_list);
 509       break;
 510     default:
 511       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 512       break;
 513     }
 514 }
 515
 516 static void
 517 gtk_scale_button_finalize (GObject *object)
 518 {
 519   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 520   GtkScaleButtonPrivate *priv = button->priv;
 521
 522   if (priv->icon_list)
 523     {
 524       g_strfreev (priv->icon_list);
 525       priv->icon_list = NULL;
 526     }
 527
 528   if (priv->adjustment)
 529     {
 530       g_object_unref (priv->adjustment);
 531       priv->adjustment = NULL;
 532     }
 533
 534   G_OBJECT_CLASS (gtk_scale_button_parent_class)->finalize (object);
 535 }
 536
 537 static void
 538 gtk_scale_button_dispose (GObject *object)
 539 {
 540   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 541   GtkScaleButtonPrivate *priv = button->priv;
 542
 543   if (priv->dock)
 544     {
 545       gtk_widget_destroy (priv->dock);
 546       priv->dock = NULL;
 547     }
 548
 549   if (priv->click_id != 0)
 550     {
 551       g_source_remove (priv->click_id);
 552       priv->click_id = 0;
 553     }
 554
 555   G_OBJECT_CLASS (gtk_scale_button_parent_class)->dispose (object);
 556 }
 557
 558 /**
 559  * gtk_scale_button_new:
 560  * @size: (type int): a stock icon size
 561  * @min: the minimum value of the scale (usually 0)
 562  * @max: the maximum value of the scale (usually 100)
 563  * @step: the stepping of value when a scroll-wheel event,
 564  *        or up/down arrow event occurs (usually 2)
 565  * @icons: (allow-none) (array zero-terminated=1): a %NULL-terminated
 566  *         array of icon names, or %NULL if you want to set the list
 567  *         later with gtk_scale_button_set_icons()
 568  *
 569  * Creates a #GtkScaleButton, with a range between @min and @max, with
 570  * a stepping of @step.
 571  *
 572  * Return value: a new #GtkScaleButton
 573  *
 574  * Since: 2.12
 575  */
 576 GtkWidget *
 577 gtk_scale_button_new (GtkIconSize   size,
 578                       gdouble       min,
 579                       gdouble       max,
 580                       gdouble       step,
 581                       const gchar **icons)
 582 {
 583   GtkScaleButton *button;
 584   GtkAdjustment *adjustment;
 585
 586   adjustment = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
 587
 588   button = g_object_new (GTK_TYPE_SCALE_BUTTON,
 589                          "adjustment", adjustment,
 590                          "icons", icons,
 591                          "size", size,
 592                          NULL);
 593
 594   return GTK_WIDGET (button);
 595 }
 596
 597 /**
 598  * gtk_scale_button_get_value:
 599  * @button: a #GtkScaleButton
 600  *
 601  * Gets the current value of the scale button.
 602  *
 603  * Return value: current value of the scale button
 604  *
 605  * Since: 2.12
 606  */
 607 gdouble
 608 gtk_scale_button_get_value (GtkScaleButton * button)
 609 {
 610   GtkScaleButtonPrivate *priv;
 611
 612   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0);
 613
 614   priv = button->priv;
 615
 616   return gtk_adjustment_get_value (priv->adjustment);
 617 }
 618
 619 /**
 620  * gtk_scale_button_set_value:
 621  * @button: a #GtkScaleButton
 622  * @value: new value of the scale button
 623  *
 624  * Sets the current value of the scale; if the value is outside
 625  * the minimum or maximum range values, it will be clamped to fit
 626  * inside them. The scale button emits the #GtkScaleButton::value-changed
 627  * signal if the value changes.
 628  *
 629  * Since: 2.12
 630  */
 631 void
 632 gtk_scale_button_set_value (GtkScaleButton *button,
 633                             gdouble         value)
 634 {
 635   GtkScaleButtonPrivate *priv;
 636
 637   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 638
 639   priv = button->priv;
 640
 641   gtk_range_set_value (GTK_RANGE (priv->scale), value);
 642 }
 643
 644 /**
 645  * gtk_scale_button_set_icons:
 646  * @button: a #GtkScaleButton
 647  * @icons: (array zero-terminated=1): a %NULL-terminated array of icon names
 648  *
 649  * Sets the icons to be used by the scale button.
 650  * For details, see the #GtkScaleButton:icons property.
 651  *
 652  * Since: 2.12
 653  */
 654 void
 655 gtk_scale_button_set_icons (GtkScaleButton  *button,
 656                             const gchar    **icons)
 657 {
 658   GtkScaleButtonPrivate *priv;
 659   gchar **tmp;
 660
 661   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 662
 663   priv = button->priv;
 664
 665   tmp = priv->icon_list;
 666   priv->icon_list = g_strdupv ((gchar **) icons);
 667   g_strfreev (tmp);
 668   gtk_scale_button_update_icon (button);
 669
 670   g_object_notify (G_OBJECT (button), "icons");
 671 }
 672
 673 /**
 674  * gtk_scale_button_get_adjustment:
 675  * @button: a #GtkScaleButton
 676  *
 677  * Gets the #GtkAdjustment associated with the #GtkScaleButton's scale.
 678  * See gtk_range_get_adjustment() for details.
 679  *
 680  * Returns: (transfer none): the adjustment associated with the scale
 681  *
 682  * Since: 2.12
 683  */
 684 GtkAdjustment*
 685 gtk_scale_button_get_adjustment (GtkScaleButton *button)
 686 {
 687   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 688
 689   return button->priv->adjustment;
 690 }
 691
 692 /**
 693  * gtk_scale_button_set_adjustment:
 694  * @button: a #GtkScaleButton
 695  * @adjustment: a #GtkAdjustment
 696  *
 697  * Sets the #GtkAdjustment to be used as a model
 698  * for the #GtkScaleButton's scale.
 699  * See gtk_range_set_adjustment() for details.
 700  *
 701  * Since: 2.12
 702  */
 703 void
 704 gtk_scale_button_set_adjustment (GtkScaleButton *button,
 705                                  GtkAdjustment  *adjustment)
 706 {
 707   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 708
 709   if (!adjustment)
 710     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 711   else
 712     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 713
 714   if (button->priv->adjustment != adjustment)
 715     {
 716       if (button->priv->adjustment)
 717         g_object_unref (button->priv->adjustment);
 718       button->priv->adjustment = g_object_ref_sink (adjustment);
 719
 720       if (button->priv->scale)
 721         gtk_range_set_adjustment (GTK_RANGE (button->priv->scale), adjustment);
 722
 723       g_object_notify (G_OBJECT (button), "adjustment");
 724     }
 725 }
 726
 727 /**
 728  * gtk_scale_button_get_plus_button:
 729  * @button: a #GtkScaleButton
 730  *
 731  * Retrieves the plus button of the #GtkScaleButton.
 732  *
 733  * Returns: (transfer none): the plus button of the #GtkScaleButton
 734  *
 735  * Since: 2.14
 736  */
 737 GtkWidget *
 738 gtk_scale_button_get_plus_button (GtkScaleButton *button)
 739 {
 740   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 741
 742   return button->priv->plus_button;
 743 }
 744
 745 /**
 746  * gtk_scale_button_get_minus_button:
 747  * @button: a #GtkScaleButton
 748  *
 749  * Retrieves the minus button of the #GtkScaleButton.
 750  *
 751  * Returns: (transfer none): the minus button of the #GtkScaleButton
 752  *
 753  * Since: 2.14
 754  */
 755 GtkWidget *
 756 gtk_scale_button_get_minus_button (GtkScaleButton *button)
 757 {
 758   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 759
 760   return button->priv->minus_button;
 761 }
 762
 763 /**
 764  * gtk_scale_button_get_popup:
 765  * @button: a #GtkScaleButton
 766  *
 767  * Retrieves the popup of the #GtkScaleButton.
 768  *
 769  * Returns: (transfer none): the popup of the #GtkScaleButton
 770  *
 771  * Since: 2.14
 772  */
 773 GtkWidget *
 774 gtk_scale_button_get_popup (GtkScaleButton *button)
 775 {
 776   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 777
 778   return button->priv->dock;
 779 }
 780
 781 static void
 782 gtk_scale_button_set_orientation_private (GtkScaleButton *button,
 783                                           GtkOrientation  orientation)
 784 {
 785   GtkScaleButtonPrivate *priv = button->priv;
 786
 787   if (orientation != priv->orientation)
 788     {
 789       priv->orientation = orientation;
 790
 791       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->box),
 792                                       orientation);
 793       gtk_container_child_set (GTK_CONTAINER (priv->box),
 794                                priv->plus_button,
 795                                "pack-type",
 796                                orientation == GTK_ORIENTATION_VERTICAL ?
 797                                GTK_PACK_START : GTK_PACK_END,
 798                                NULL);
 799       gtk_container_child_set (GTK_CONTAINER (priv->box),
 800                                priv->minus_button,
 801                                "pack-type",
 802                                orientation == GTK_ORIENTATION_VERTICAL ?
 803                                GTK_PACK_END : GTK_PACK_START,
 804                                NULL);
 805
 806       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->scale),
 807                                       orientation);
 808
 809       if (orientation == GTK_ORIENTATION_VERTICAL)
 810         {
 811           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 812                                        -1, SCALE_SIZE);
 813           gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
 814         }
 815       else
 816         {
 817           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 818                                        SCALE_SIZE, -1);
 819           gtk_range_set_inverted (GTK_RANGE (priv->scale), FALSE);
 820         }
 821
 822       /* FIXME: without this, the popup window appears as a square
 823        * after changing the orientation
 824        */
 825       gtk_window_resize (GTK_WINDOW (priv->dock), 1, 1);
 826
 827       g_object_notify (G_OBJECT (button), "orientation");
 828     }
 829 }
 830
 831 /*
 832  * button callbacks.
 833  */
 834
 835 static gboolean
 836 gtk_scale_button_scroll (GtkWidget      *widget,
 837                          GdkEventScroll *event)
 838 {
 839   GtkScaleButton *button;
 840   GtkScaleButtonPrivate *priv;
 841   GtkAdjustment *adjustment;
 842   gdouble d;
 843
 844   button = GTK_SCALE_BUTTON (widget);
 845   priv = button->priv;
 846   adjustment = priv->adjustment;
 847
 848   if (event->type != GDK_SCROLL)
 849     return FALSE;
 850
 851   d = gtk_scale_button_get_value (button);
 852   if (event->direction == GDK_SCROLL_UP)
 853     {
 854       d += gtk_adjustment_get_step_increment (adjustment);
 855       if (d > gtk_adjustment_get_upper (adjustment))
 856         d = gtk_adjustment_get_upper (adjustment);
 857     }
 858   else
 859     {
 860       d -= gtk_adjustment_get_step_increment (adjustment);
 861       if (d < gtk_adjustment_get_lower (adjustment))
 862         d = gtk_adjustment_get_lower (adjustment);
 863     }
 864   gtk_scale_button_set_value (button, d);
 865
 866   return TRUE;
 867 }
 868
 869 static void
 870 gtk_scale_button_screen_changed (GtkWidget *widget,
 871                                  GdkScreen *previous_screen)
 872 {
 873   GtkScaleButton *button = (GtkScaleButton *) widget;
 874   GtkScaleButtonPrivate *priv;
 875   GdkScreen *screen;
 876   GValue value = { 0, };
 877
 878   if (gtk_widget_has_screen (widget) == FALSE)
 879     return;
 880
 881   priv = button->priv;
 882
 883   screen = gtk_widget_get_screen (widget);
 884   g_value_init (&value, G_TYPE_INT);
 885   if (gdk_screen_get_setting (screen,
 886                               "gtk-double-click-time",
 887                               &value) == FALSE)
 888     {
 889       priv->click_timeout = CLICK_TIMEOUT;
 890       return;
 891     }
 892
 893   priv->click_timeout = g_value_get_int (&value);
 894 }
 895
 896 static gboolean
 897 gtk_scale_popup (GtkWidget *widget,
 898                  GdkEvent  *event,
 899                  guint32    time)
 900 {
 901   GtkAllocation allocation, dock_allocation, scale_allocation;
 902   GtkScaleButton *button;
 903   GtkScaleButtonPrivate *priv;
 904   GtkAdjustment *adjustment;
 905   gint x, y, m, dx, dy, sx, sy, startoff;
 906   gint min_slider_size;
 907   gdouble v;
 908   GdkScreen *screen;
 909   gboolean is_moved;
 910   GdkDevice *device, *keyboard, *pointer;
 911
 912   is_moved = FALSE;
 913   button = GTK_SCALE_BUTTON (widget);
 914   priv = button->priv;
 915   adjustment = priv->adjustment;
 916
 917   screen = gtk_widget_get_screen (widget);
 918   gtk_widget_get_allocation (widget, &allocation);
 919
 920   /* position roughly */
 921   gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
 922
 923   gdk_window_get_origin (gtk_widget_get_window (widget),
 924                          &x, &y);
 925   x += allocation.x;
 926   y += allocation.y;
 927
 928   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 929     gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
 930   else
 931     gtk_window_move (GTK_WINDOW (priv->dock), x - (SCALE_SIZE / 2), y);
 932
 933   gtk_widget_show_all (priv->dock);
 934
 935   gdk_window_get_origin (gtk_widget_get_window (priv->dock),
 936                          &dx, &dy);
 937   gtk_widget_get_allocation (priv->dock, &dock_allocation);
 938   dx += dock_allocation.x;
 939   dy += dock_allocation.y;
 940
 941
 942   gdk_window_get_origin (gtk_widget_get_window (priv->scale),
 943                          &sx, &sy);
 944   gtk_widget_get_allocation (priv->scale, &scale_allocation);
 945   sx += scale_allocation.x;
 946   sy += scale_allocation.y;
 947
 948   priv->timeout = TRUE;
 949
 950   /* position (needs widget to be shown already) */
 951   v = gtk_scale_button_get_value (button) / (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment));
 952   min_slider_size = gtk_range_get_min_slider_size (GTK_RANGE (priv->scale));
 953
 954   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 955     {
 956       startoff = sy - dy;
 957
 958       x += (allocation.width - dock_allocation.width) / 2;
 959       y -= startoff;
 960       y -= min_slider_size / 2;
 961       m = scale_allocation.height - min_slider_size;
 962       y -= m * (1.0 - v);
 963     }
 964   else
 965     {
 966       startoff = sx - dx;
 967
 968       x -= startoff;
 969       y += (allocation.height - dock_allocation.height) / 2;
 970       x -= min_slider_size / 2;
 971       m = scale_allocation.width - min_slider_size;
 972       x -= m * v;
 973     }
 974
 975   /* Make sure the dock stays inside the monitor */
 976   if (event->type == GDK_BUTTON_PRESS)
 977     {
 978       GtkAllocation d_allocation;
 979       int monitor;
 980       GdkEventButton *button_event = (GdkEventButton *) event;
 981       GdkRectangle rect;
 982       GtkWidget *d;
 983
 984       d = GTK_WIDGET (priv->dock);
 985       monitor = gdk_screen_get_monitor_at_point (screen,
 986                                                  button_event->x_root,
 987                                                  button_event->y_root);
 988       gdk_screen_get_monitor_geometry (screen, monitor, &rect);
 989
 990       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 991         y += button_event->y;
 992       else
 993         x += button_event->x;
 994
 995       /* Move the dock, but set is_moved so we
 996        * don't forward the first click later on,
 997        * as it could make the scale go to the bottom */
 998       gtk_widget_get_allocation (d, &d_allocation);
 999       if (y < rect.y)
1000         {
1001           y = rect.y;
1002           is_moved = TRUE;
1003         }
1004       else if (y + d_allocation.height > rect.height + rect.y)
1005         {
1006           y = rect.y + rect.height - d_allocation.height;
1007           is_moved = TRUE;
1008         }
1009
1010       if (x < rect.x)
1011         {
1012           x = rect.x;
1013           is_moved = TRUE;
1014         }
1015       else if (x + d_allocation.width > rect.width + rect.x)
1016         {
1017           x = rect.x + rect.width - d_allocation.width;
1018           is_moved = TRUE;
1019         }
1020     }
1021
1022   gtk_window_move (GTK_WINDOW (priv->dock), x, y);
1023
1024   if (event->type == GDK_BUTTON_PRESS)
1025     GTK_WIDGET_CLASS (gtk_scale_button_parent_class)->button_press_event (widget, (GdkEventButton *) event);
1026
1027   device = gdk_event_get_device (event);
1028
1029   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
1030     {
1031       keyboard = device;
1032       pointer = gdk_device_get_associated_device (device);
1033     }
1034   else
1035     {
1036       pointer = device;
1037       keyboard = gdk_device_get_associated_device (device);
1038     }
1039
1040   /* grab focus */
1041   gtk_device_grab_add (priv->dock, pointer, TRUE);
1042
1043   if (gdk_device_grab (pointer, gtk_widget_get_window (priv->dock),
1044                        GDK_OWNERSHIP_WINDOW, TRUE,
1045                        GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1046                        GDK_POINTER_MOTION_MASK, NULL, time) != GDK_GRAB_SUCCESS)
1047     {
1048       gtk_device_grab_remove (priv->dock, pointer);
1049       gtk_widget_hide (priv->dock);
1050       return FALSE;
1051     }
1052
1053   if (gdk_device_grab (keyboard, gtk_widget_get_window (priv->dock),
1054                        GDK_OWNERSHIP_WINDOW, TRUE,
1055                        GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
1056                        NULL, time) != GDK_GRAB_SUCCESS)
1057     {
1058       gdk_device_ungrab (pointer, time);
1059       gtk_device_grab_remove (priv->dock, pointer);
1060       gtk_widget_hide (priv->dock);
1061       return FALSE;
1062     }
1063
1064   gtk_widget_grab_focus (priv->dock);
1065   priv->grab_keyboard = keyboard;
1066   priv->grab_pointer = pointer;
1067
1068   if (event->type == GDK_BUTTON_PRESS && !is_moved)
1069     {
1070       GdkEventButton *e;
1071       GdkEventButton *button_event = (GdkEventButton *) event;
1072
1073       /* forward event to the slider */
1074       e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1075       e->window = gtk_widget_get_window (priv->scale);
1076
1077       /* position: the X position isn't relevant, halfway will work just fine.
1078        * The vertical position should be *exactly* in the middle of the slider
1079        * of the scale; if we don't do that correctly, it'll move from its current
1080        * position, which means a position change on-click, which is bad.
1081        */
1082       gtk_widget_get_allocation (priv->scale, &scale_allocation);
1083       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1084         {
1085           e->x = scale_allocation.width / 2;
1086           m = scale_allocation.height - min_slider_size;
1087           e->y = ((1.0 - v) * m) + min_slider_size / 2;
1088         }
1089       else
1090         {
1091           e->y = scale_allocation.height / 2;
1092           m = scale_allocation.width - min_slider_size;
1093           e->x = (v * m) + min_slider_size / 2;
1094         }
1095
1096       gtk_widget_event (priv->scale, (GdkEvent *) e);
1097       e->window = button_event->window;
1098       gdk_event_free ((GdkEvent *) e);
1099     }
1100
1101   gtk_widget_grab_focus (priv->scale);
1102
1103   priv->pop_time = time;
1104
1105   return TRUE;
1106 }
1107
1108 static gboolean
1109 gtk_scale_button_press (GtkWidget      *widget,
1110                         GdkEventButton *event)
1111 {
1112   return gtk_scale_popup (widget, (GdkEvent *) event, event->time);
1113 }
1114
1115 static void
1116 gtk_scale_button_popup (GtkWidget *widget)
1117 {
1118   GdkEvent *ev;
1119
1120   /* This is a callback for a keybinding signal,
1121    * current event should  be the key event that
1122    * triggered it.
1123    */
1124   ev = gtk_get_current_event ();
1125
1126   if (ev->type != GDK_KEY_PRESS &&
1127       ev->type != GDK_KEY_RELEASE)
1128     {
1129       gdk_event_free (ev);
1130       ev = gdk_event_new (GDK_KEY_RELEASE);
1131       ev->key.time = GDK_CURRENT_TIME;
1132     }
1133
1134   gtk_scale_popup (widget, ev, ev->key.time);
1135   gdk_event_free (ev);
1136 }
1137
1138 static gboolean
1139 gtk_scale_button_key_release (GtkWidget   *widget,
1140                               GdkEventKey *event)
1141 {
1142   return gtk_bindings_activate_event (G_OBJECT (widget), event);
1143 }
1144
1145 /* This is called when the grab is broken for
1146  * either the dock, or the scale itself */
1147 static void
1148 gtk_scale_button_grab_notify (GtkScaleButton *button,
1149                               gboolean        was_grabbed)
1150 {
1151   GtkScaleButtonPrivate *priv;
1152   GtkWidget *toplevel, *grab_widget;
1153   GtkWindowGroup *group;
1154
1155   priv = button->priv;
1156
1157   if (!priv->grab_pointer ||
1158       !gtk_widget_device_is_shadowed (GTK_WIDGET (button), priv->grab_pointer))
1159     return;
1160
1161   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
1162
1163   if (GTK_IS_WINDOW (toplevel))
1164     group = gtk_window_get_group (GTK_WINDOW (toplevel));
1165   else
1166     group = gtk_window_get_group (NULL);
1167
1168   grab_widget = gtk_window_group_get_current_device_grab (group, priv->grab_pointer);
1169
1170   if (grab_widget &&
1171       gtk_widget_is_ancestor (grab_widget, priv->dock))
1172     return;
1173
1174   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1175   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1176   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1177
1178   priv->grab_keyboard = NULL;
1179   priv->grab_pointer = NULL;
1180
1181   /* hide again */
1182   gtk_widget_hide (priv->dock);
1183   priv->timeout = FALSE;
1184 }
1185
1186 /*
1187  * +/- button callbacks.
1188  */
1189
1190 static gboolean
1191 cb_button_timeout (gpointer user_data)
1192 {
1193   GtkScaleButton *button;
1194   GtkScaleButtonPrivate *priv;
1195   GtkAdjustment *adjustment;
1196   gdouble val;
1197   gboolean res = TRUE;
1198
1199   button = GTK_SCALE_BUTTON (user_data);
1200   priv = button->priv;
1201
1202   if (priv->click_id == 0)
1203     return FALSE;
1204
1205   adjustment = priv->adjustment;
1206
1207   val = gtk_scale_button_get_value (button);
1208   val += priv->direction;
1209   if (val <= gtk_adjustment_get_lower (adjustment))
1210     {
1211       res = FALSE;
1212       val = gtk_adjustment_get_lower (adjustment);
1213     }
1214   else if (val > gtk_adjustment_get_upper (adjustment))
1215     {
1216       res = FALSE;
1217       val = gtk_adjustment_get_upper (adjustment);
1218     }
1219   gtk_scale_button_set_value (button, val);
1220
1221   if (!res)
1222     {
1223       g_source_remove (priv->click_id);
1224       priv->click_id = 0;
1225     }
1226
1227   return res;
1228 }
1229
1230 static gboolean
1231 cb_button_press (GtkWidget      *widget,
1232                  GdkEventButton *event,
1233                  gpointer        user_data)
1234 {
1235   GtkScaleButton *button;
1236   GtkScaleButtonPrivate *priv;
1237   GtkAdjustment *adjustment;
1238
1239   button = GTK_SCALE_BUTTON (user_data);
1240   priv = button->priv;
1241   adjustment = priv->adjustment;
1242
1243   if (priv->click_id != 0)
1244     g_source_remove (priv->click_id);
1245
1246   if (widget == priv->plus_button)
1247     priv->direction = fabs (gtk_adjustment_get_page_increment (adjustment));
1248   else
1249     priv->direction = - fabs (gtk_adjustment_get_page_increment (adjustment));
1250
1251   priv->click_id = gdk_threads_add_timeout (priv->click_timeout,
1252                                             cb_button_timeout,
1253                                             button);
1254   cb_button_timeout (button);
1255
1256   return TRUE;
1257 }
1258
1259 static gboolean
1260 cb_button_release (GtkWidget      *widget,
1261                    GdkEventButton *event,
1262                    gpointer        user_data)
1263 {
1264   GtkScaleButton *button;
1265   GtkScaleButtonPrivate *priv;
1266
1267   button = GTK_SCALE_BUTTON (user_data);
1268   priv = button->priv;
1269
1270   if (priv->click_id != 0)
1271     {
1272       g_source_remove (priv->click_id);
1273       priv->click_id = 0;
1274     }
1275
1276   return TRUE;
1277 }
1278
1279 static void
1280 cb_dock_grab_notify (GtkWidget *widget,
1281                      gboolean   was_grabbed,
1282                      gpointer   user_data)
1283 {
1284   GtkScaleButton *button = (GtkScaleButton *) user_data;
1285
1286   gtk_scale_button_grab_notify (button, was_grabbed);
1287 }
1288
1289 static gboolean
1290 cb_dock_grab_broken_event (GtkWidget *widget,
1291                            gboolean   was_grabbed,
1292                            gpointer   user_data)
1293 {
1294   GtkScaleButton *button = (GtkScaleButton *) user_data;
1295
1296   gtk_scale_button_grab_notify (button, FALSE);
1297
1298   return FALSE;
1299 }
1300
1301 /* Scale callbacks  */
1302
1303 static void
1304 gtk_scale_button_release_grab (GtkScaleButton *button,
1305                                GdkEventButton *event)
1306 {
1307   GdkEventButton *e;
1308   GtkScaleButtonPrivate *priv;
1309
1310   priv = button->priv;
1311
1312   /* ungrab focus */
1313   gdk_device_ungrab (priv->grab_keyboard, event->time);
1314   gdk_device_ungrab (priv->grab_pointer, event->time);
1315   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1316
1317   priv->grab_keyboard = NULL;
1318   priv->grab_pointer = NULL;
1319
1320   /* hide again */
1321   gtk_widget_hide (priv->dock);
1322   priv->timeout = FALSE;
1323
1324   e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1325   e->window = gtk_widget_get_window (GTK_WIDGET (button));
1326   e->type = GDK_BUTTON_RELEASE;
1327   gtk_widget_event (GTK_WIDGET (button), (GdkEvent *) e);
1328   e->window = event->window;
1329   gdk_event_free ((GdkEvent *) e);
1330 }
1331
1332 static gboolean
1333 cb_dock_button_press (GtkWidget      *widget,
1334                       GdkEventButton *event,
1335                       gpointer        user_data)
1336 {
1337   GtkScaleButton *button = GTK_SCALE_BUTTON (user_data);
1338
1339   if (event->type == GDK_BUTTON_PRESS)
1340     {
1341       gtk_scale_button_release_grab (button, event);
1342       return TRUE;
1343     }
1344
1345   return FALSE;
1346 }
1347
1348 static void
1349 gtk_scale_button_popdown (GtkWidget *widget)
1350 {
1351   GtkScaleButton *button;
1352   GtkScaleButtonPrivate *priv;
1353
1354   button = GTK_SCALE_BUTTON (widget);
1355   priv = button->priv;
1356
1357   /* ungrab focus */
1358   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1359   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1360   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1361
1362   priv->grab_keyboard = NULL;
1363   priv->grab_pointer = NULL;
1364
1365   /* hide again */
1366   gtk_widget_hide (priv->dock);
1367   priv->timeout = FALSE;
1368 }
1369
1370 static gboolean
1371 cb_dock_key_release (GtkWidget   *widget,
1372                      GdkEventKey *event,
1373                      gpointer     user_data)
1374 {
1375   if (event->keyval == GDK_KEY_Escape)
1376     {
1377       gtk_scale_button_popdown (GTK_WIDGET (user_data));
1378       return TRUE;
1379     }
1380
1381   if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
1382     {
1383       /* The popup hasn't managed the event, pass onto the button */
1384       gtk_bindings_activate_event (G_OBJECT (user_data), event);
1385     }
1386
1387   return TRUE;
1388 }
1389
1390 static void
1391 cb_scale_grab_notify (GtkWidget *widget,
1392                       gboolean   was_grabbed,
1393                       gpointer   user_data)
1394 {
1395   GtkScaleButton *button = (GtkScaleButton *) user_data;
1396
1397   gtk_scale_button_grab_notify (button, was_grabbed);
1398 }
1399
1400 /*
1401  * Scale stuff.
1402  */
1403
1404 #define GTK_TYPE_SCALE_BUTTON_SCALE    (_gtk_scale_button_scale_get_type ())
1405 #define GTK_SCALE_BUTTON_SCALE(obj)    (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON_SCALE, GtkScaleButtonScale))
1406 #define GTK_IS_SCALE_BUTTON_SCALE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SCALE_BUTTON_SCALE))
1407
1408 typedef struct _GtkScaleButtonScale
1409 {
1410   GtkScale parent_instance;
1411   GtkScaleButton *button;
1412 } GtkScaleButtonScale;
1413
1414 typedef struct _GtkScaleButtonScaleClass
1415 {
1416   GtkScaleClass parent_class;
1417 } GtkScaleButtonScaleClass;
1418
1419 static gboolean gtk_scale_button_scale_press   (GtkWidget      *widget,
1420                                                 GdkEventButton *event);
1421 static gboolean gtk_scale_button_scale_release (GtkWidget      *widget,
1422                                                 GdkEventButton *event);
1423
1424 G_DEFINE_TYPE (GtkScaleButtonScale, _gtk_scale_button_scale, GTK_TYPE_SCALE)
1425
1426 static void
1427 _gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
1428 {
1429   GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
1430   GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
1431
1432   gtkwidget_class->button_press_event = gtk_scale_button_scale_press;
1433   gtkwidget_class->button_release_event = gtk_scale_button_scale_release;
1434   gtkrange_class->value_changed = gtk_scale_button_scale_value_changed;
1435 }
1436
1437 static void
1438 _gtk_scale_button_scale_init (GtkScaleButtonScale *scale)
1439 {
1440 }
1441
1442 static GtkWidget *
1443 gtk_scale_button_scale_new (GtkScaleButton *button)
1444 {
1445   GtkScaleButtonPrivate *priv = button->priv;
1446   GtkScaleButtonScale *scale;
1447
1448   scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE,
1449                         "orientation", priv->orientation,
1450                         "adjustment",  priv->adjustment,
1451                         "draw-value",  FALSE,
1452                         NULL);
1453
1454   scale->button = button;
1455
1456   g_signal_connect (scale, "grab-notify",
1457                     G_CALLBACK (cb_scale_grab_notify), button);
1458
1459   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1460     {
1461       gtk_widget_set_size_request (GTK_WIDGET (scale), -1, SCALE_SIZE);
1462       gtk_range_set_inverted (GTK_RANGE (scale), TRUE);
1463     }
1464   else
1465     {
1466       gtk_widget_set_size_request (GTK_WIDGET (scale), SCALE_SIZE, -1);
1467       gtk_range_set_inverted (GTK_RANGE (scale), FALSE);
1468     }
1469
1470   return GTK_WIDGET (scale);
1471 }
1472
1473 static gboolean
1474 gtk_scale_button_scale_press (GtkWidget      *widget,
1475                               GdkEventButton *event)
1476 {
1477   GtkScaleButtonPrivate *priv = GTK_SCALE_BUTTON_SCALE (widget)->button->priv;
1478
1479   /* the scale will grab input; if we have input grabbed, all goes
1480    * horribly wrong, so let's not do that.
1481    */
1482   gtk_device_grab_remove (priv->dock, event->device);
1483
1484   return GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_press_event (widget, event);
1485 }
1486
1487 static gboolean
1488 gtk_scale_button_scale_release (GtkWidget      *widget,
1489                                 GdkEventButton *event)
1490 {
1491   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (widget)->button;
1492   gboolean res;
1493
1494   if (button->priv->timeout)
1495     {
1496       /* if we did a quick click, leave the window open; else, hide it */
1497       if (event->time > button->priv->pop_time + button->priv->click_timeout)
1498         {
1499
1500           gtk_scale_button_release_grab (button, event);
1501           GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1502
1503           return TRUE;
1504         }
1505
1506       button->priv->timeout = FALSE;
1507     }
1508
1509   res = GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1510
1511   /* the scale will release input; right after that, we *have to* grab
1512    * it back so we can catch out-of-scale clicks and hide the popup,
1513    * so I basically want a g_signal_connect_after_always(), but I can't
1514    * find that, so we do this complex 'first-call-parent-then-do-actual-
1515    * action' thingy...
1516    */
1517   gtk_device_grab_add (button->priv->dock, event->device, TRUE);
1518
1519   return res;
1520 }
1521
1522 static void
1523 gtk_scale_button_update_icon (GtkScaleButton *button)
1524 {
1525   GtkScaleButtonPrivate *priv;
1526   GtkAdjustment *adjustment;
1527   gdouble value;
1528   const gchar *name;
1529   guint num_icons;
1530
1531   priv = button->priv;
1532
1533   if (!priv->icon_list || priv->icon_list[0] == '\0')
1534     {
1535       gtk_image_set_from_stock (GTK_IMAGE (priv->image),
1536                                 GTK_STOCK_MISSING_IMAGE,
1537                                 priv->size);
1538       return;
1539     }
1540
1541   num_icons = g_strv_length (priv->icon_list);
1542
1543   /* The 1-icon special case */
1544   if (num_icons == 1)
1545     {
1546       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1547                                     priv->icon_list[0],
1548                                     priv->size);
1549       return;
1550     }
1551
1552   adjustment = priv->adjustment;
1553   value = gtk_scale_button_get_value (button);
1554
1555   /* The 2-icons special case */
1556   if (num_icons == 2)
1557     {
1558       gdouble limit;
1559
1560       limit = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / 2 + gtk_adjustment_get_lower (adjustment);
1561       if (value < limit)
1562         name = priv->icon_list[0];
1563       else
1564         name = priv->icon_list[1];
1565
1566       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1567                                     name,
1568                                     priv->size);
1569       return;
1570     }
1571
1572   /* With 3 or more icons */
1573   if (value == gtk_adjustment_get_lower (adjustment))
1574     {
1575       name = priv->icon_list[0];
1576     }
1577   else if (value == gtk_adjustment_get_upper (adjustment))
1578     {
1579       name = priv->icon_list[1];
1580     }
1581   else
1582     {
1583       gdouble step;
1584       guint i;
1585
1586       step = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / (num_icons - 2);
1587       i = (guint) ((value - gtk_adjustment_get_lower (adjustment)) / step) + 2;
1588       g_assert (i < num_icons);
1589       name = priv->icon_list[i];
1590     }
1591
1592   gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1593                                 name,
1594                                 priv->size);
1595 }
1596
1597 static void
1598 gtk_scale_button_scale_value_changed (GtkRange *range)
1599 {
1600   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (range)->button;
1601   gdouble value;
1602
1603   value = gtk_range_get_value (range);
1604
1605   gtk_scale_button_update_icon (button);
1606
1607   g_signal_emit (button, signals[VALUE_CHANGED], 0, value);
1608   g_object_notify (G_OBJECT (button), "value");
1609 }