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