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