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