Pileus Git - ~andy/gtk/blob - gtk/gtkscalebutton.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2005 Ronald S. Bultje
   3  * Copyright (C) 2006, 2007 Christian Persch
   4  * Copyright (C) 2006 Jan Arne Petersen
   5  * Copyright (C) 2005-2007 Red Hat, Inc.
   6  *
   7  * Authors:
   8  * - Ronald S. Bultje <rbultje@ronald.bitfreak.net>
   9  * - Bastien Nocera <bnocera@redhat.com>
  10  * - Jan Arne Petersen <jpetersen@jpetersen.org>
  11  * - Christian Persch <chpe@svn.gnome.org>
  12  *
  13  * This library is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2 of the License, or (at your option) any later version.
  17  *
  18  * This library is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with this library; if not, write to the
  25  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  26  * Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*
  30  * Modified by the GTK+ Team and others 2007.  See the AUTHORS
  31  * file for a list of people on the GTK+ Team.  See the ChangeLog
  32  * files for a list of changes.  These files are distributed with
  33  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  34  */
  35
  36 #include "config.h"
  37
  38 #ifndef _WIN32
  39 #define _GNU_SOURCE
  40 #endif
  41 #include <math.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #include "gtkbindings.h"
  46 #include "gtkframe.h"
  47 #include "gtkmain.h"
  48 #include "gtkmarshalers.h"
  49 #include "gtkorientable.h"
  50 #include "gtkprivate.h"
  51 #include "gtkscale.h"
  52 #include "gtkscalebutton.h"
  53 #include "gtkstock.h"
  54 #include "gtkvbox.h"
  55 #include "gtkwindow.h"
  56
  57 #include "gtkintl.h"
  58
  59 /**
  60  * SECTION:gtkscalebutton
  61  * @Short_description: A button which pops up a scale
  62  * @Title: GtkScaleButton
  63  *
  64  * #GtkScaleButton provides a button which pops up a scale widget.
  65  * This kind of widget is commonly used for volume controls in multimedia
  66  * applications, and GTK+ provides a #GtkVolumeButton subclass that
  67  * is tailored for this use case.
  68  */
  69
  70
  71 #define SCALE_SIZE 100
  72 #define CLICK_TIMEOUT 250
  73
  74 enum
  75 {
  76   VALUE_CHANGED,
  77   POPUP,
  78   POPDOWN,
  79
  80   LAST_SIGNAL
  81 };
  82
  83 enum
  84 {
  85   PROP_0,
  86
  87   PROP_ORIENTATION,
  88   PROP_VALUE,
  89   PROP_SIZE,
  90   PROP_ADJUSTMENT,
  91   PROP_ICONS
  92 };
  93
  94 struct _GtkScaleButtonPrivate
  95 {
  96   GtkWidget *plus_button;
  97   GtkWidget *minus_button;
  98   GtkWidget *dock;
  99   GtkWidget *box;
 100   GtkWidget *scale;
 101   GtkWidget *image;
 102
 103   GtkIconSize size;
 104   GtkOrientation orientation;
 105
 106   guint click_id;
 107   gint click_timeout;
 108   guint timeout : 1;
 109   gdouble direction;
 110   guint32 pop_time;
 111
 112   gchar **icon_list;
 113
 114   GdkDevice *grab_pointer;
 115   GdkDevice *grab_keyboard;
 116
 117   GtkAdjustment *adjustment; /* needed because it must be settable in init() */
 118 };
 119
 120 static GObject* gtk_scale_button_constructor    (GType                  type,
 121                                                  guint                  n_construct_properties,
 122                                                  GObjectConstructParam *construct_params);
 123 static void     gtk_scale_button_dispose        (GObject             *object);
 124 static void     gtk_scale_button_finalize       (GObject             *object);
 125 static void     gtk_scale_button_set_property   (GObject             *object,
 126                                                  guint                prop_id,
 127                                                  const GValue        *value,
 128                                                  GParamSpec          *pspec);
 129 static void     gtk_scale_button_get_property   (GObject             *object,
 130                                                  guint                prop_id,
 131                                                  GValue              *value,
 132                                                  GParamSpec          *pspec);
 133 static void gtk_scale_button_set_orientation_private (GtkScaleButton *button,
 134                                                       GtkOrientation  orientation);
 135 static gboolean gtk_scale_button_scroll         (GtkWidget           *widget,
 136                                                  GdkEventScroll      *event);
 137 static void gtk_scale_button_screen_changed     (GtkWidget           *widget,
 138                                                  GdkScreen           *previous_screen);
 139 static gboolean gtk_scale_button_press          (GtkWidget           *widget,
 140                                                  GdkEventButton      *event);
 141 static gboolean gtk_scale_button_key_release    (GtkWidget           *widget,
 142                                                  GdkEventKey         *event);
 143 static void     gtk_scale_button_popup          (GtkWidget           *widget);
 144 static void     gtk_scale_button_popdown        (GtkWidget           *widget);
 145 static gboolean cb_dock_button_press            (GtkWidget           *widget,
 146                                                  GdkEventButton      *event,
 147                                                  gpointer             user_data);
 148 static gboolean cb_dock_key_release             (GtkWidget           *widget,
 149                                                  GdkEventKey         *event,
 150                                                  gpointer             user_data);
 151 static gboolean cb_button_press                 (GtkWidget           *widget,
 152                                                  GdkEventButton      *event,
 153                                                  gpointer             user_data);
 154 static gboolean cb_button_release               (GtkWidget           *widget,
 155                                                  GdkEventButton      *event,
 156                                                  gpointer             user_data);
 157 static void cb_dock_grab_notify                 (GtkWidget           *widget,
 158                                                  gboolean             was_grabbed,
 159                                                  gpointer             user_data);
 160 static gboolean cb_dock_grab_broken_event       (GtkWidget           *widget,
 161                                                  gboolean             was_grabbed,
 162                                                  gpointer             user_data);
 163 static void cb_scale_grab_notify                (GtkWidget           *widget,
 164                                                  gboolean             was_grabbed,
 165                                                  gpointer             user_data);
 166 static void gtk_scale_button_update_icon        (GtkScaleButton      *button);
 167 static void gtk_scale_button_scale_value_changed(GtkRange            *range);
 168
 169 /* see below for scale definitions */
 170 static GtkWidget *gtk_scale_button_scale_new    (GtkScaleButton      *button);
 171
 172 G_DEFINE_TYPE_WITH_CODE (GtkScaleButton, gtk_scale_button, GTK_TYPE_BUTTON,
 173                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 174                                                 NULL))
 175
 176 static guint signals[LAST_SIGNAL] = { 0, };
 177
 178 static void
 179 gtk_scale_button_class_init (GtkScaleButtonClass *klass)
 180 {
 181   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 182   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 183   GtkBindingSet *binding_set;
 184
 185   g_type_class_add_private (klass, sizeof (GtkScaleButtonPrivate));
 186
 187   gobject_class->constructor = gtk_scale_button_constructor;
 188   gobject_class->finalize = gtk_scale_button_finalize;
 189   gobject_class->dispose = gtk_scale_button_dispose;
 190   gobject_class->set_property = gtk_scale_button_set_property;
 191   gobject_class->get_property = gtk_scale_button_get_property;
 192
 193   widget_class->button_press_event = gtk_scale_button_press;
 194   widget_class->key_release_event = gtk_scale_button_key_release;
 195   widget_class->scroll_event = gtk_scale_button_scroll;
 196   widget_class->screen_changed = gtk_scale_button_screen_changed;
 197
 198   /**
 199    * GtkScaleButton:orientation:
 200    *
 201    * The orientation of the #GtkScaleButton's popup window.
 202    *
 203    * Note that since GTK+ 2.16, #GtkScaleButton implements the
 204    * #GtkOrientable interface which has its own @orientation
 205    * property. However we redefine the property here in order to
 206    * override its default horizontal orientation.
 207    *
 208    * Since: 2.14
 209    **/
 210   g_object_class_override_property (gobject_class,
 211                                     PROP_ORIENTATION,
 212                                     "orientation");
 213
 214   g_object_class_install_property (gobject_class,
 215                                    PROP_VALUE,
 216                                    g_param_spec_double ("value",
 217                                                         P_("Value"),
 218                                                         P_("The value of the scale"),
 219                                                         -G_MAXDOUBLE,
 220                                                         G_MAXDOUBLE,
 221                                                         0,
 222                                                         GTK_PARAM_READWRITE));
 223
 224   g_object_class_install_property (gobject_class,
 225                                    PROP_SIZE,
 226                                    g_param_spec_enum ("size",
 227                                                       P_("Icon size"),
 228                                                       P_("The icon size"),
 229                                                       GTK_TYPE_ICON_SIZE,
 230                                                       GTK_ICON_SIZE_SMALL_TOOLBAR,
 231                                                       GTK_PARAM_READWRITE));
 232
 233   g_object_class_install_property (gobject_class,
 234                                    PROP_ADJUSTMENT,
 235                                    g_param_spec_object ("adjustment",
 236                                                         P_("Adjustment"),
 237                                                         P_("The GtkAdjustment that contains the current value of this scale button object"),
 238                                                         GTK_TYPE_ADJUSTMENT,
 239                                                         GTK_PARAM_READWRITE));
 240
 241   /**
 242    * GtkScaleButton:icons:
 243    *
 244    * The names of the icons to be used by the scale button.
 245    * The first item in the array will be used in the button
 246    * when the current value is the lowest value, the second
 247    * item for the highest value. All the subsequent icons will
 248    * be used for all the other values, spread evenly over the
 249    * range of values.
 250    *
 251    * If there's only one icon name in the @icons array, it will
 252    * be used for all the values. If only two icon names are in
 253    * the @icons array, the first one will be used for the bottom
 254    * 50% of the scale, and the second one for the top 50%.
 255    *
 256    * It is recommended to use at least 3 icons so that the
 257    * #GtkScaleButton reflects the current value of the scale
 258    * better for the users.
 259    *
 260    * Since: 2.12
 261    */
 262   g_object_class_install_property (gobject_class,
 263                                    PROP_ICONS,
 264                                    g_param_spec_boxed ("icons",
 265                                                        P_("Icons"),
 266                                                        P_("List of icon names"),
 267                                                        G_TYPE_STRV,
 268                                                        GTK_PARAM_READWRITE));
 269
 270   /**
 271    * GtkScaleButton::value-changed:
 272    * @button: the object which received the signal
 273    * @value: the new value
 274    *
 275    * The ::value-changed signal is emitted when the value field has
 276    * changed.
 277    *
 278    * Since: 2.12
 279    */
 280   signals[VALUE_CHANGED] =
 281     g_signal_new (I_("value-changed"),
 282                   G_TYPE_FROM_CLASS (klass),
 283                   G_SIGNAL_RUN_LAST,
 284                   G_STRUCT_OFFSET (GtkScaleButtonClass, value_changed),
 285                   NULL, NULL,
 286                   _gtk_marshal_VOID__DOUBLE,
 287                   G_TYPE_NONE, 1, G_TYPE_DOUBLE);
 288
 289   /**
 290    * GtkScaleButton::popup:
 291    * @button: the object which received the signal
 292    *
 293    * The ::popup signal is a
 294    * <link linkend="keybinding-signals">keybinding signal</link>
 295    * which gets emitted to popup the scale widget.
 296    *
 297    * The default bindings for this signal are Space, Enter and Return.
 298    *
 299    * Since: 2.12
 300    */
 301   signals[POPUP] =
 302     g_signal_new_class_handler (I_("popup"),
 303                                 G_OBJECT_CLASS_TYPE (klass),
 304                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 305                                 G_CALLBACK (gtk_scale_button_popup),
 306                                 NULL, NULL,
 307                                 g_cclosure_marshal_VOID__VOID,
 308                                 G_TYPE_NONE, 0);
 309
 310   /**
 311    * GtkScaleButton::popdown:
 312    * @button: the object which received the signal
 313    *
 314    * The ::popdown signal is a
 315    * <link linkend="keybinding-signals">keybinding signal</link>
 316    * which gets emitted to popdown the scale widget.
 317    *
 318    * The default binding for this signal is Escape.
 319    *
 320    * Since: 2.12
 321    */
 322   signals[POPDOWN] =
 323     g_signal_new_class_handler (I_("popdown"),
 324                                 G_OBJECT_CLASS_TYPE (klass),
 325                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 326                                 G_CALLBACK (gtk_scale_button_popdown),
 327                                 NULL, NULL,
 328                                 g_cclosure_marshal_VOID__VOID,
 329                                 G_TYPE_NONE, 0);
 330
 331   /* Key bindings */
 332   binding_set = gtk_binding_set_by_class (widget_class);
 333
 334   gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, 0,
 335                                 "popup", 0);
 336   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Space, 0,
 337                                 "popup", 0);
 338   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Return, 0,
 339                                 "popup", 0);
 340   gtk_binding_entry_add_signal (binding_set, GDK_KEY_ISO_Enter, 0,
 341                                 "popup", 0);
 342   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Enter, 0,
 343                                 "popup", 0);
 344   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0,
 345                                 "popdown", 0);
 346 }
 347
 348 static void
 349 gtk_scale_button_init (GtkScaleButton *button)
 350 {
 351   GtkScaleButtonPrivate *priv;
 352   GtkWidget *frame;
 353
 354   button->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (button,
 355                                                      GTK_TYPE_SCALE_BUTTON,
 356                                                      GtkScaleButtonPrivate);
 357
 358   priv->timeout = FALSE;
 359   priv->click_id = 0;
 360   priv->click_timeout = CLICK_TIMEOUT;
 361   priv->orientation = GTK_ORIENTATION_VERTICAL;
 362
 363   gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
 364   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 365
 366   /* image */
 367   priv->image = gtk_image_new ();
 368   gtk_container_add (GTK_CONTAINER (button), priv->image);
 369   gtk_widget_show_all (priv->image);
 370
 371   /* window */
 372   priv->dock = gtk_window_new (GTK_WINDOW_POPUP);
 373   gtk_widget_set_name (priv->dock, "gtk-scalebutton-popup-window");
 374   g_signal_connect (priv->dock, "button-press-event",
 375                     G_CALLBACK (cb_dock_button_press), button);
 376   g_signal_connect (priv->dock, "key-release-event",
 377                     G_CALLBACK (cb_dock_key_release), button);
 378   g_signal_connect (priv->dock, "grab-notify",
 379                     G_CALLBACK (cb_dock_grab_notify), button);
 380   g_signal_connect (priv->dock, "grab-broken-event",
 381                     G_CALLBACK (cb_dock_grab_broken_event), button);
 382   gtk_window_set_decorated (GTK_WINDOW (priv->dock), FALSE);
 383
 384   /* frame */
 385   frame = gtk_frame_new (NULL);
 386   gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
 387   gtk_container_add (GTK_CONTAINER (priv->dock), frame);
 388
 389   /* box for scale and +/- buttons */
 390   priv->box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
 391   gtk_container_add (GTK_CONTAINER (frame), priv->box);
 392
 393   /* + */
 394   priv->plus_button = gtk_button_new_with_label ("+");
 395   gtk_button_set_relief (GTK_BUTTON (priv->plus_button), GTK_RELIEF_NONE);
 396   g_signal_connect (priv->plus_button, "button-press-event",
 397                     G_CALLBACK (cb_button_press), button);
 398   g_signal_connect (priv->plus_button, "button-release-event",
 399                     G_CALLBACK (cb_button_release), button);
 400   gtk_box_pack_start (GTK_BOX (priv->box), priv->plus_button, FALSE, FALSE, 0);
 401
 402   /* - */
 403   priv->minus_button = gtk_button_new_with_label ("-");
 404   gtk_button_set_relief (GTK_BUTTON (priv->minus_button), GTK_RELIEF_NONE);
 405   g_signal_connect (priv->minus_button, "button-press-event",
 406                    G_CALLBACK (cb_button_press), button);
 407   g_signal_connect (priv->minus_button, "button-release-event",
 408                     G_CALLBACK (cb_button_release), button);
 409   gtk_box_pack_end (GTK_BOX (priv->box), priv->minus_button, FALSE, FALSE, 0);
 410
 411   priv->adjustment = gtk_adjustment_new (0.0, 0.0, 100.0, 2, 20, 0);
 412   g_object_ref_sink (priv->adjustment);
 413
 414   /* the scale */
 415   priv->scale = gtk_scale_button_scale_new (button);
 416   gtk_container_add (GTK_CONTAINER (priv->box), priv->scale);
 417 }
 418
 419 static GObject *
 420 gtk_scale_button_constructor (GType                  type,
 421                               guint                  n_construct_properties,
 422                               GObjectConstructParam *construct_params)
 423 {
 424   GObject *object;
 425   GtkScaleButton *button;
 426   GtkScaleButtonPrivate *priv;
 427
 428   object = G_OBJECT_CLASS (gtk_scale_button_parent_class)->constructor (type, n_construct_properties, construct_params);
 429
 430   button = GTK_SCALE_BUTTON (object);
 431
 432   priv = button->priv;
 433
 434   /* set button text and size */
 435   priv->size = GTK_ICON_SIZE_SMALL_TOOLBAR;
 436   gtk_scale_button_update_icon (button);
 437
 438   return object;
 439 }
 440
 441 static void
 442 gtk_scale_button_set_property (GObject       *object,
 443                                guint          prop_id,
 444                                const GValue  *value,
 445                                GParamSpec    *pspec)
 446 {
 447   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 448
 449   switch (prop_id)
 450     {
 451     case PROP_ORIENTATION:
 452       gtk_scale_button_set_orientation_private (button, g_value_get_enum (value));
 453       break;
 454     case PROP_VALUE:
 455       gtk_scale_button_set_value (button, g_value_get_double (value));
 456       break;
 457     case PROP_SIZE:
 458       {
 459         GtkIconSize size;
 460         size = g_value_get_enum (value);
 461         if (button->priv->size != size)
 462           {
 463             button->priv->size = size;
 464             gtk_scale_button_update_icon (button);
 465           }
 466       }
 467       break;
 468     case PROP_ADJUSTMENT:
 469       gtk_scale_button_set_adjustment (button, g_value_get_object (value));
 470       break;
 471     case PROP_ICONS:
 472       gtk_scale_button_set_icons (button,
 473                                   (const gchar **)g_value_get_boxed (value));
 474       break;
 475     default:
 476       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 477       break;
 478     }
 479 }
 480
 481 static void
 482 gtk_scale_button_get_property (GObject     *object,
 483                                guint        prop_id,
 484                                GValue      *value,
 485                                GParamSpec  *pspec)
 486 {
 487   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 488   GtkScaleButtonPrivate *priv = button->priv;
 489
 490   switch (prop_id)
 491     {
 492     case PROP_ORIENTATION:
 493       g_value_set_enum (value, priv->orientation);
 494       break;
 495     case PROP_VALUE:
 496       g_value_set_double (value, gtk_scale_button_get_value (button));
 497       break;
 498     case PROP_SIZE:
 499       g_value_set_enum (value, priv->size);
 500       break;
 501     case PROP_ADJUSTMENT:
 502       g_value_set_object (value, gtk_scale_button_get_adjustment (button));
 503       break;
 504     case PROP_ICONS:
 505       g_value_set_boxed (value, priv->icon_list);
 506       break;
 507     default:
 508       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 509       break;
 510     }
 511 }
 512
 513 static void
 514 gtk_scale_button_finalize (GObject *object)
 515 {
 516   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 517   GtkScaleButtonPrivate *priv = button->priv;
 518
 519   if (priv->icon_list)
 520     {
 521       g_strfreev (priv->icon_list);
 522       priv->icon_list = NULL;
 523     }
 524
 525   if (priv->adjustment)
 526     {
 527       g_object_unref (priv->adjustment);
 528       priv->adjustment = NULL;
 529     }
 530
 531   G_OBJECT_CLASS (gtk_scale_button_parent_class)->finalize (object);
 532 }
 533
 534 static void
 535 gtk_scale_button_dispose (GObject *object)
 536 {
 537   GtkScaleButton *button = GTK_SCALE_BUTTON (object);
 538   GtkScaleButtonPrivate *priv = button->priv;
 539
 540   if (priv->dock)
 541     {
 542       gtk_widget_destroy (priv->dock);
 543       priv->dock = NULL;
 544     }
 545
 546   if (priv->click_id != 0)
 547     {
 548       g_source_remove (priv->click_id);
 549       priv->click_id = 0;
 550     }
 551
 552   G_OBJECT_CLASS (gtk_scale_button_parent_class)->dispose (object);
 553 }
 554
 555 /**
 556  * gtk_scale_button_new:
 557  * @size: (type int): a stock icon size
 558  * @min: the minimum value of the scale (usually 0)
 559  * @max: the maximum value of the scale (usually 100)
 560  * @step: the stepping of value when a scroll-wheel event,
 561  *        or up/down arrow event occurs (usually 2)
 562  * @icons: (allow-none): a %NULL-terminated array of icon names, or %NULL if
 563  *         you want to set the list later with gtk_scale_button_set_icons()
 564  *
 565  * Creates a #GtkScaleButton, with a range between @min and @max, with
 566  * a stepping of @step.
 567  *
 568  * Return value: a new #GtkScaleButton
 569  *
 570  * Since: 2.12
 571  */
 572 GtkWidget *
 573 gtk_scale_button_new (GtkIconSize   size,
 574                       gdouble       min,
 575                       gdouble       max,
 576                       gdouble       step,
 577                       const gchar **icons)
 578 {
 579   GtkScaleButton *button;
 580   GtkAdjustment *adj;
 581
 582   adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
 583
 584   button = g_object_new (GTK_TYPE_SCALE_BUTTON,
 585                          "adjustment", adj,
 586                          "icons", icons,
 587                          "size", size,
 588                          NULL);
 589
 590   return GTK_WIDGET (button);
 591 }
 592
 593 /**
 594  * gtk_scale_button_get_value:
 595  * @button: a #GtkScaleButton
 596  *
 597  * Gets the current value of the scale button.
 598  *
 599  * Return value: current value of the scale button
 600  *
 601  * Since: 2.12
 602  */
 603 gdouble
 604 gtk_scale_button_get_value (GtkScaleButton * button)
 605 {
 606   GtkScaleButtonPrivate *priv;
 607
 608   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0);
 609
 610   priv = button->priv;
 611
 612   return gtk_adjustment_get_value (priv->adjustment);
 613 }
 614
 615 /**
 616  * gtk_scale_button_set_value:
 617  * @button: a #GtkScaleButton
 618  * @value: new value of the scale button
 619  *
 620  * Sets the current value of the scale; if the value is outside
 621  * the minimum or maximum range values, it will be clamped to fit
 622  * inside them. The scale button emits the #GtkScaleButton::value-changed
 623  * signal if the value changes.
 624  *
 625  * Since: 2.12
 626  */
 627 void
 628 gtk_scale_button_set_value (GtkScaleButton *button,
 629                             gdouble         value)
 630 {
 631   GtkScaleButtonPrivate *priv;
 632
 633   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 634
 635   priv = button->priv;
 636
 637   gtk_range_set_value (GTK_RANGE (priv->scale), value);
 638 }
 639
 640 /**
 641  * gtk_scale_button_set_icons:
 642  * @button: a #GtkScaleButton
 643  * @icons: a %NULL-terminated array of icon names
 644  *
 645  * Sets the icons to be used by the scale button.
 646  * For details, see the #GtkScaleButton:icons property.
 647  *
 648  * Since: 2.12
 649  */
 650 void
 651 gtk_scale_button_set_icons (GtkScaleButton  *button,
 652                             const gchar    **icons)
 653 {
 654   GtkScaleButtonPrivate *priv;
 655   gchar **tmp;
 656
 657   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 658
 659   priv = button->priv;
 660
 661   tmp = priv->icon_list;
 662   priv->icon_list = g_strdupv ((gchar **) icons);
 663   g_strfreev (tmp);
 664   gtk_scale_button_update_icon (button);
 665
 666   g_object_notify (G_OBJECT (button), "icons");
 667 }
 668
 669 /**
 670  * gtk_scale_button_get_adjustment:
 671  * @button: a #GtkScaleButton
 672  *
 673  * Gets the #GtkAdjustment associated with the #GtkScaleButton's scale.
 674  * See gtk_range_get_adjustment() for details.
 675  *
 676  * Returns: (transfer none): the adjustment associated with the scale
 677  *
 678  * Since: 2.12
 679  */
 680 GtkAdjustment*
 681 gtk_scale_button_get_adjustment (GtkScaleButton *button)
 682 {
 683   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 684
 685   return button->priv->adjustment;
 686 }
 687
 688 /**
 689  * gtk_scale_button_set_adjustment:
 690  * @button: a #GtkScaleButton
 691  * @adjustment: a #GtkAdjustment
 692  *
 693  * Sets the #GtkAdjustment to be used as a model
 694  * for the #GtkScaleButton's scale.
 695  * See gtk_range_set_adjustment() for details.
 696  *
 697  * Since: 2.12
 698  */
 699 void
 700 gtk_scale_button_set_adjustment (GtkScaleButton *button,
 701                                  GtkAdjustment  *adjustment)
 702 {
 703   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 704
 705   if (!adjustment)
 706     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 707   else
 708     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 709
 710   if (button->priv->adjustment != adjustment)
 711     {
 712       if (button->priv->adjustment)
 713         g_object_unref (button->priv->adjustment);
 714       button->priv->adjustment = g_object_ref_sink (adjustment);
 715
 716       if (button->priv->scale)
 717         gtk_range_set_adjustment (GTK_RANGE (button->priv->scale), adjustment);
 718
 719       g_object_notify (G_OBJECT (button), "adjustment");
 720     }
 721 }
 722
 723 /**
 724  * gtk_scale_button_get_plus_button:
 725  * @button: a #GtkScaleButton
 726  *
 727  * Retrieves the plus button of the #GtkScaleButton.
 728  *
 729  * Returns: (transfer none): the plus button of the #GtkScaleButton
 730  *
 731  * Since: 2.14
 732  */
 733 GtkWidget *
 734 gtk_scale_button_get_plus_button (GtkScaleButton *button)
 735 {
 736   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 737
 738   return button->priv->plus_button;
 739 }
 740
 741 /**
 742  * gtk_scale_button_get_minus_button:
 743  * @button: a #GtkScaleButton
 744  *
 745  * Retrieves the minus button of the #GtkScaleButton.
 746  *
 747  * Returns: (transfer none): the minus button of the #GtkScaleButton
 748  *
 749  * Since: 2.14
 750  */
 751 GtkWidget *
 752 gtk_scale_button_get_minus_button (GtkScaleButton *button)
 753 {
 754   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 755
 756   return button->priv->minus_button;
 757 }
 758
 759 /**
 760  * gtk_scale_button_get_popup:
 761  * @button: a #GtkScaleButton
 762  *
 763  * Retrieves the popup of the #GtkScaleButton.
 764  *
 765  * Returns: (transfer none): the popup of the #GtkScaleButton
 766  *
 767  * Since: 2.14
 768  */
 769 GtkWidget *
 770 gtk_scale_button_get_popup (GtkScaleButton *button)
 771 {
 772   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 773
 774   return button->priv->dock;
 775 }
 776
 777 static void
 778 gtk_scale_button_set_orientation_private (GtkScaleButton *button,
 779                                           GtkOrientation  orientation)
 780 {
 781   GtkScaleButtonPrivate *priv = button->priv;
 782
 783   if (orientation != priv->orientation)
 784     {
 785       priv->orientation = orientation;
 786
 787       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->box),
 788                                       orientation);
 789       gtk_container_child_set (GTK_CONTAINER (priv->box),
 790                                priv->plus_button,
 791                                "pack-type",
 792                                orientation == GTK_ORIENTATION_VERTICAL ?
 793                                GTK_PACK_START : GTK_PACK_END,
 794                                NULL);
 795       gtk_container_child_set (GTK_CONTAINER (priv->box),
 796                                priv->minus_button,
 797                                "pack-type",
 798                                orientation == GTK_ORIENTATION_VERTICAL ?
 799                                GTK_PACK_END : GTK_PACK_START,
 800                                NULL);
 801
 802       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->scale),
 803                                       orientation);
 804
 805       if (orientation == GTK_ORIENTATION_VERTICAL)
 806         {
 807           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 808                                        -1, SCALE_SIZE);
 809           gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
 810         }
 811       else
 812         {
 813           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 814                                        SCALE_SIZE, -1);
 815           gtk_range_set_inverted (GTK_RANGE (priv->scale), FALSE);
 816         }
 817
 818       /* FIXME: without this, the popup window appears as a square
 819        * after changing the orientation
 820        */
 821       gtk_window_resize (GTK_WINDOW (priv->dock), 1, 1);
 822
 823       g_object_notify (G_OBJECT (button), "orientation");
 824     }
 825 }
 826
 827 /*
 828  * button callbacks.
 829  */
 830
 831 static gboolean
 832 gtk_scale_button_scroll (GtkWidget      *widget,
 833                          GdkEventScroll *event)
 834 {
 835   GtkScaleButton *button;
 836   GtkScaleButtonPrivate *priv;
 837   GtkAdjustment *adj;
 838   gdouble d;
 839
 840   button = GTK_SCALE_BUTTON (widget);
 841   priv = button->priv;
 842   adj = priv->adjustment;
 843
 844   if (event->type != GDK_SCROLL)
 845     return FALSE;
 846
 847   d = gtk_scale_button_get_value (button);
 848   if (event->direction == GDK_SCROLL_UP)
 849     {
 850       d += adj->step_increment;
 851       if (d > adj->upper)
 852         d = adj->upper;
 853     }
 854   else
 855     {
 856       d -= adj->step_increment;
 857       if (d < adj->lower)
 858         d = adj->lower;
 859     }
 860   gtk_scale_button_set_value (button, d);
 861
 862   return TRUE;
 863 }
 864
 865 static void
 866 gtk_scale_button_screen_changed (GtkWidget *widget,
 867                                  GdkScreen *previous_screen)
 868 {
 869   GtkScaleButton *button = (GtkScaleButton *) widget;
 870   GtkScaleButtonPrivate *priv;
 871   GdkScreen *screen;
 872   GValue value = { 0, };
 873
 874   if (gtk_widget_has_screen (widget) == FALSE)
 875     return;
 876
 877   priv = button->priv;
 878
 879   screen = gtk_widget_get_screen (widget);
 880   g_value_init (&value, G_TYPE_INT);
 881   if (gdk_screen_get_setting (screen,
 882                               "gtk-double-click-time",
 883                               &value) == FALSE)
 884     {
 885       priv->click_timeout = CLICK_TIMEOUT;
 886       return;
 887     }
 888
 889   priv->click_timeout = g_value_get_int (&value);
 890 }
 891
 892 static gboolean
 893 gtk_scale_popup (GtkWidget *widget,
 894                  GdkEvent  *event,
 895                  guint32    time)
 896 {
 897   GtkAllocation allocation, dock_allocation, scale_allocation;
 898   GtkScaleButton *button;
 899   GtkScaleButtonPrivate *priv;
 900   GtkAdjustment *adj;
 901   gint x, y, m, dx, dy, sx, sy, startoff;
 902   gint min_slider_size;
 903   gdouble v;
 904   GdkDisplay *display;
 905   GdkScreen *screen;
 906   gboolean is_moved;
 907   GdkDevice *device, *keyboard, *pointer;
 908
 909   is_moved = FALSE;
 910   button = GTK_SCALE_BUTTON (widget);
 911   priv = button->priv;
 912   adj = priv->adjustment;
 913
 914   display = gtk_widget_get_display (widget);
 915   screen = gtk_widget_get_screen (widget);
 916   gtk_widget_get_allocation (widget, &allocation);
 917
 918   /* position roughly */
 919   gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
 920
 921   gdk_window_get_origin (gtk_widget_get_window (widget),
 922                          &x, &y);
 923   x += allocation.x;
 924   y += allocation.y;
 925
 926   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 927     gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
 928   else
 929     gtk_window_move (GTK_WINDOW (priv->dock), x - (SCALE_SIZE / 2), y);
 930
 931   gtk_widget_show_all (priv->dock);
 932
 933   gdk_window_get_origin (gtk_widget_get_window (priv->dock),
 934                          &dx, &dy);
 935   gtk_widget_get_allocation (priv->dock, &dock_allocation);
 936   dx += dock_allocation.x;
 937   dy += dock_allocation.y;
 938
 939
 940   gdk_window_get_origin (gtk_widget_get_window (priv->scale),
 941                          &sx, &sy);
 942   gtk_widget_get_allocation (priv->scale, &scale_allocation);
 943   sx += scale_allocation.x;
 944   sy += scale_allocation.y;
 945
 946   priv->timeout = TRUE;
 947
 948   /* position (needs widget to be shown already) */
 949   v = gtk_scale_button_get_value (button) / (adj->upper - adj->lower);
 950   min_slider_size = gtk_range_get_min_slider_size (GTK_RANGE (priv->scale));
 951
 952   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 953     {
 954       startoff = sy - dy;
 955
 956       x += (allocation.width - dock_allocation.width) / 2;
 957       y -= startoff;
 958       y -= min_slider_size / 2;
 959       m = scale_allocation.height - min_slider_size;
 960       y -= m * (1.0 - v);
 961     }
 962   else
 963     {
 964       startoff = sx - dx;
 965
 966       x -= startoff;
 967       y += (allocation.height - dock_allocation.height) / 2;
 968       x -= min_slider_size / 2;
 969       m = scale_allocation.width - min_slider_size;
 970       x -= m * v;
 971     }
 972
 973   /* Make sure the dock stays inside the monitor */
 974   if (event->type == GDK_BUTTON_PRESS)
 975     {
 976       GtkAllocation d_allocation;
 977       int monitor;
 978       GdkEventButton *button_event = (GdkEventButton *) event;
 979       GdkRectangle rect;
 980       GtkWidget *d;
 981
 982       d = GTK_WIDGET (priv->dock);
 983       monitor = gdk_screen_get_monitor_at_point (screen,
 984                                                  button_event->x_root,
 985                                                  button_event->y_root);
 986       gdk_screen_get_monitor_geometry (screen, monitor, &rect);
 987
 988       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 989         y += button_event->y;
 990       else
 991         x += button_event->x;
 992
 993       /* Move the dock, but set is_moved so we
 994        * don't forward the first click later on,
 995        * as it could make the scale go to the bottom */
 996       gtk_widget_get_allocation (d, &d_allocation);
 997       if (y < rect.y)
 998         {
 999           y = rect.y;
1000           is_moved = TRUE;
1001         }
1002       else if (y + d_allocation.height > rect.height + rect.y)
1003         {
1004           y = rect.y + rect.height - d_allocation.height;
1005           is_moved = TRUE;
1006         }
1007
1008       if (x < rect.x)
1009         {
1010           x = rect.x;
1011           is_moved = TRUE;
1012         }
1013       else if (x + d_allocation.width > rect.width + rect.x)
1014         {
1015           x = rect.x + rect.width - d_allocation.width;
1016           is_moved = TRUE;
1017         }
1018     }
1019
1020   gtk_window_move (GTK_WINDOW (priv->dock), x, y);
1021
1022   if (event->type == GDK_BUTTON_PRESS)
1023     GTK_WIDGET_CLASS (gtk_scale_button_parent_class)->button_press_event (widget, (GdkEventButton *) event);
1024
1025   device = gdk_event_get_device (event);
1026
1027   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
1028     {
1029       keyboard = device;
1030       pointer = gdk_device_get_associated_device (device);
1031     }
1032   else
1033     {
1034       pointer = device;
1035       keyboard = gdk_device_get_associated_device (device);
1036     }
1037
1038   /* grab focus */
1039   gtk_device_grab_add (priv->dock, pointer, TRUE);
1040
1041   if (gdk_device_grab (pointer, gtk_widget_get_window (priv->dock),
1042                        GDK_OWNERSHIP_WINDOW, TRUE,
1043                        GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1044                        GDK_POINTER_MOTION_MASK, NULL, time) != GDK_GRAB_SUCCESS)
1045     {
1046       gtk_device_grab_remove (priv->dock, pointer);
1047       gtk_widget_hide (priv->dock);
1048       return FALSE;
1049     }
1050
1051   if (gdk_device_grab (keyboard, gtk_widget_get_window (priv->dock),
1052                        GDK_OWNERSHIP_WINDOW, TRUE,
1053                        GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
1054                        NULL, time) != GDK_GRAB_SUCCESS)
1055     {
1056       gdk_device_ungrab (pointer, time);
1057       gtk_device_grab_remove (priv->dock, pointer);
1058       gtk_widget_hide (priv->dock);
1059       return FALSE;
1060     }
1061
1062   gtk_widget_grab_focus (priv->dock);
1063   priv->grab_keyboard = keyboard;
1064   priv->grab_pointer = pointer;
1065
1066   if (event->type == GDK_BUTTON_PRESS && !is_moved)
1067     {
1068       GdkEventButton *e;
1069       GdkEventButton *button_event = (GdkEventButton *) event;
1070
1071       /* forward event to the slider */
1072       e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1073       e->window = gtk_widget_get_window (priv->scale);
1074
1075       /* position: the X position isn't relevant, halfway will work just fine.
1076        * The vertical position should be *exactly* in the middle of the slider
1077        * of the scale; if we don't do that correctly, it'll move from its current
1078        * position, which means a position change on-click, which is bad.
1079        */
1080       gtk_widget_get_allocation (priv->scale, &scale_allocation);
1081       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1082         {
1083           e->x = scale_allocation.width / 2;
1084           m = scale_allocation.height - min_slider_size;
1085           e->y = ((1.0 - v) * m) + min_slider_size / 2;
1086         }
1087       else
1088         {
1089           e->y = scale_allocation.height / 2;
1090           m = scale_allocation.width - min_slider_size;
1091           e->x = (v * m) + min_slider_size / 2;
1092         }
1093
1094       gtk_widget_event (priv->scale, (GdkEvent *) e);
1095       e->window = button_event->window;
1096       gdk_event_free ((GdkEvent *) e);
1097     }
1098
1099   gtk_widget_grab_focus (priv->scale);
1100
1101   priv->pop_time = time;
1102
1103   return TRUE;
1104 }
1105
1106 static gboolean
1107 gtk_scale_button_press (GtkWidget      *widget,
1108                         GdkEventButton *event)
1109 {
1110   return gtk_scale_popup (widget, (GdkEvent *) event, event->time);
1111 }
1112
1113 static void
1114 gtk_scale_button_popup (GtkWidget *widget)
1115 {
1116   GdkEvent *ev;
1117
1118   /* This is a callback for a keybinding signal,
1119    * current event should  be the key event that
1120    * triggered it.
1121    */
1122   ev = gtk_get_current_event ();
1123
1124   if (ev->type != GDK_KEY_PRESS &&
1125       ev->type != GDK_KEY_RELEASE)
1126     {
1127       gdk_event_free (ev);
1128       ev = gdk_event_new (GDK_KEY_RELEASE);
1129       ev->key.time = GDK_CURRENT_TIME;
1130     }
1131
1132   gtk_scale_popup (widget, ev, ev->key.time);
1133   gdk_event_free (ev);
1134 }
1135
1136 static gboolean
1137 gtk_scale_button_key_release (GtkWidget   *widget,
1138                               GdkEventKey *event)
1139 {
1140   return gtk_bindings_activate_event (G_OBJECT (widget), event);
1141 }
1142
1143 /* This is called when the grab is broken for
1144  * either the dock, or the scale itself */
1145 static void
1146 gtk_scale_button_grab_notify (GtkScaleButton *button,
1147                               gboolean        was_grabbed)
1148 {
1149   GdkDisplay *display;
1150   GtkScaleButtonPrivate *priv;
1151   GtkWidget *toplevel, *grab_widget;
1152   GtkWindowGroup *group;
1153
1154   priv = button->priv;
1155
1156   if (!priv->grab_pointer ||
1157       !gtk_widget_device_is_shadowed (GTK_WIDGET (button), priv->grab_pointer))
1158     return;
1159
1160   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
1161
1162   if (GTK_IS_WINDOW (toplevel))
1163     group = gtk_window_get_group (GTK_WINDOW (toplevel));
1164   else
1165     group = gtk_window_get_group (NULL);
1166
1167   grab_widget = gtk_window_group_get_current_device_grab (group, priv->grab_pointer);
1168
1169   if (grab_widget &&
1170       gtk_widget_is_ancestor (grab_widget, priv->dock))
1171     return;
1172
1173   display = gtk_widget_get_display (priv->dock);
1174   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1175   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1176   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1177
1178   priv->grab_keyboard = NULL;
1179   priv->grab_pointer = NULL;
1180
1181   /* hide again */
1182   gtk_widget_hide (priv->dock);
1183   priv->timeout = FALSE;
1184 }
1185
1186 /*
1187  * +/- button callbacks.
1188  */
1189
1190 static gboolean
1191 cb_button_timeout (gpointer user_data)
1192 {
1193   GtkScaleButton *button;
1194   GtkScaleButtonPrivate *priv;
1195   GtkAdjustment *adj;
1196   gdouble val;
1197   gboolean res = TRUE;
1198
1199   button = GTK_SCALE_BUTTON (user_data);
1200   priv = button->priv;
1201
1202   if (priv->click_id == 0)
1203     return FALSE;
1204
1205   adj = priv->adjustment;
1206
1207   val = gtk_scale_button_get_value (button);
1208   val += priv->direction;
1209   if (val <= adj->lower)
1210     {
1211       res = FALSE;
1212       val = adj->lower;
1213     }
1214   else if (val > adj->upper)
1215     {
1216       res = FALSE;
1217       val = adj->upper;
1218     }
1219   gtk_scale_button_set_value (button, val);
1220
1221   if (!res)
1222     {
1223       g_source_remove (priv->click_id);
1224       priv->click_id = 0;
1225     }
1226
1227   return res;
1228 }
1229
1230 static gboolean
1231 cb_button_press (GtkWidget      *widget,
1232                  GdkEventButton *event,
1233                  gpointer        user_data)
1234 {
1235   GtkScaleButton *button;
1236   GtkScaleButtonPrivate *priv;
1237   GtkAdjustment *adj;
1238
1239   button = GTK_SCALE_BUTTON (user_data);
1240   priv = button->priv;
1241   adj = priv->adjustment;
1242
1243   if (priv->click_id != 0)
1244     g_source_remove (priv->click_id);
1245
1246   if (widget == priv->plus_button)
1247     priv->direction = fabs (adj->page_increment);
1248   else
1249     priv->direction = - fabs (adj->page_increment);
1250
1251   priv->click_id = gdk_threads_add_timeout (priv->click_timeout,
1252                                             cb_button_timeout,
1253                                             button);
1254   cb_button_timeout (button);
1255
1256   return TRUE;
1257 }
1258
1259 static gboolean
1260 cb_button_release (GtkWidget      *widget,
1261                    GdkEventButton *event,
1262                    gpointer        user_data)
1263 {
1264   GtkScaleButton *button;
1265   GtkScaleButtonPrivate *priv;
1266
1267   button = GTK_SCALE_BUTTON (user_data);
1268   priv = button->priv;
1269
1270   if (priv->click_id != 0)
1271     {
1272       g_source_remove (priv->click_id);
1273       priv->click_id = 0;
1274     }
1275
1276   return TRUE;
1277 }
1278
1279 static void
1280 cb_dock_grab_notify (GtkWidget *widget,
1281                      gboolean   was_grabbed,
1282                      gpointer   user_data)
1283 {
1284   GtkScaleButton *button = (GtkScaleButton *) user_data;
1285
1286   gtk_scale_button_grab_notify (button, was_grabbed);
1287 }
1288
1289 static gboolean
1290 cb_dock_grab_broken_event (GtkWidget *widget,
1291                            gboolean   was_grabbed,
1292                            gpointer   user_data)
1293 {
1294   GtkScaleButton *button = (GtkScaleButton *) user_data;
1295
1296   gtk_scale_button_grab_notify (button, FALSE);
1297
1298   return FALSE;
1299 }
1300
1301 /*
1302  * Scale callbacks.
1303  */
1304
1305 static void
1306 gtk_scale_button_release_grab (GtkScaleButton *button,
1307                                GdkEventButton *event)
1308 {
1309   GdkEventButton *e;
1310   GdkDisplay *display;
1311   GtkScaleButtonPrivate *priv;
1312
1313   priv = button->priv;
1314
1315   /* ungrab focus */
1316   display = gtk_widget_get_display (GTK_WIDGET (button));
1317   gdk_device_ungrab (priv->grab_keyboard, event->time);
1318   gdk_device_ungrab (priv->grab_pointer, event->time);
1319   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1320
1321   priv->grab_keyboard = NULL;
1322   priv->grab_pointer = NULL;
1323
1324   /* hide again */
1325   gtk_widget_hide (priv->dock);
1326   priv->timeout = FALSE;
1327
1328   e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1329   e->window = gtk_widget_get_window (GTK_WIDGET (button));
1330   e->type = GDK_BUTTON_RELEASE;
1331   gtk_widget_event (GTK_WIDGET (button), (GdkEvent *) e);
1332   e->window = event->window;
1333   gdk_event_free ((GdkEvent *) e);
1334 }
1335
1336 static gboolean
1337 cb_dock_button_press (GtkWidget      *widget,
1338                       GdkEventButton *event,
1339                       gpointer        user_data)
1340 {
1341   GtkScaleButton *button = GTK_SCALE_BUTTON (user_data);
1342
1343   if (event->type == GDK_BUTTON_PRESS)
1344     {
1345       gtk_scale_button_release_grab (button, event);
1346       return TRUE;
1347     }
1348
1349   return FALSE;
1350 }
1351
1352 static void
1353 gtk_scale_button_popdown (GtkWidget *widget)
1354 {
1355   GtkScaleButton *button;
1356   GtkScaleButtonPrivate *priv;
1357   GdkDisplay *display;
1358
1359   button = GTK_SCALE_BUTTON (widget);
1360   priv = button->priv;
1361
1362   /* ungrab focus */
1363   display = gtk_widget_get_display (widget);
1364   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1365   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1366   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1367
1368   priv->grab_keyboard = NULL;
1369   priv->grab_pointer = NULL;
1370
1371   /* hide again */
1372   gtk_widget_hide (priv->dock);
1373   priv->timeout = FALSE;
1374 }
1375
1376 static gboolean
1377 cb_dock_key_release (GtkWidget   *widget,
1378                      GdkEventKey *event,
1379                      gpointer     user_data)
1380 {
1381   if (event->keyval == GDK_KEY_Escape)
1382     {
1383       gtk_scale_button_popdown (GTK_WIDGET (user_data));
1384       return TRUE;
1385     }
1386
1387   if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
1388     {
1389       /* The popup hasn't managed the event, pass onto the button */
1390       gtk_bindings_activate_event (G_OBJECT (user_data), event);
1391     }
1392
1393   return TRUE;
1394 }
1395
1396 static void
1397 cb_scale_grab_notify (GtkWidget *widget,
1398                       gboolean   was_grabbed,
1399                       gpointer   user_data)
1400 {
1401   GtkScaleButton *button = (GtkScaleButton *) user_data;
1402
1403   gtk_scale_button_grab_notify (button, was_grabbed);
1404 }
1405
1406 /*
1407  * Scale stuff.
1408  */
1409
1410 #define GTK_TYPE_SCALE_BUTTON_SCALE    (_gtk_scale_button_scale_get_type ())
1411 #define GTK_SCALE_BUTTON_SCALE(obj)    (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON_SCALE, GtkScaleButtonScale))
1412 #define GTK_IS_SCALE_BUTTON_SCALE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SCALE_BUTTON_SCALE))
1413
1414 typedef struct _GtkScaleButtonScale
1415 {
1416   GtkScale parent_instance;
1417   GtkScaleButton *button;
1418 } GtkScaleButtonScale;
1419
1420 typedef struct _GtkScaleButtonScaleClass
1421 {
1422   GtkScaleClass parent_class;
1423 } GtkScaleButtonScaleClass;
1424
1425 static gboolean gtk_scale_button_scale_press   (GtkWidget      *widget,
1426                                                 GdkEventButton *event);
1427 static gboolean gtk_scale_button_scale_release (GtkWidget      *widget,
1428                                                 GdkEventButton *event);
1429
1430 G_DEFINE_TYPE (GtkScaleButtonScale, _gtk_scale_button_scale, GTK_TYPE_SCALE)
1431
1432 static void
1433 _gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
1434 {
1435   GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
1436   GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
1437
1438   gtkwidget_class->button_press_event = gtk_scale_button_scale_press;
1439   gtkwidget_class->button_release_event = gtk_scale_button_scale_release;
1440   gtkrange_class->value_changed = gtk_scale_button_scale_value_changed;
1441 }
1442
1443 static void
1444 _gtk_scale_button_scale_init (GtkScaleButtonScale *scale)
1445 {
1446 }
1447
1448 static GtkWidget *
1449 gtk_scale_button_scale_new (GtkScaleButton *button)
1450 {
1451   GtkScaleButtonPrivate *priv = button->priv;
1452   GtkScaleButtonScale *scale;
1453
1454   scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE,
1455                         "orientation", priv->orientation,
1456                         "adjustment",  priv->adjustment,
1457                         "draw-value",  FALSE,
1458                         NULL);
1459
1460   scale->button = button;
1461
1462   g_signal_connect (scale, "grab-notify",
1463                     G_CALLBACK (cb_scale_grab_notify), button);
1464
1465   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1466     {
1467       gtk_widget_set_size_request (GTK_WIDGET (scale), -1, SCALE_SIZE);
1468       gtk_range_set_inverted (GTK_RANGE (scale), TRUE);
1469     }
1470   else
1471     {
1472       gtk_widget_set_size_request (GTK_WIDGET (scale), SCALE_SIZE, -1);
1473       gtk_range_set_inverted (GTK_RANGE (scale), FALSE);
1474     }
1475
1476   return GTK_WIDGET (scale);
1477 }
1478
1479 static gboolean
1480 gtk_scale_button_scale_press (GtkWidget      *widget,
1481                               GdkEventButton *event)
1482 {
1483   GtkScaleButtonPrivate *priv = GTK_SCALE_BUTTON_SCALE (widget)->button->priv;
1484
1485   /* the scale will grab input; if we have input grabbed, all goes
1486    * horribly wrong, so let's not do that.
1487    */
1488   gtk_device_grab_remove (priv->dock, event->device);
1489
1490   return GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_press_event (widget, event);
1491 }
1492
1493 static gboolean
1494 gtk_scale_button_scale_release (GtkWidget      *widget,
1495                                 GdkEventButton *event)
1496 {
1497   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (widget)->button;
1498   gboolean res;
1499
1500   if (button->priv->timeout)
1501     {
1502       /* if we did a quick click, leave the window open; else, hide it */
1503       if (event->time > button->priv->pop_time + button->priv->click_timeout)
1504         {
1505
1506           gtk_scale_button_release_grab (button, event);
1507           GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1508
1509           return TRUE;
1510         }
1511
1512       button->priv->timeout = FALSE;
1513     }
1514
1515   res = GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1516
1517   /* the scale will release input; right after that, we *have to* grab
1518    * it back so we can catch out-of-scale clicks and hide the popup,
1519    * so I basically want a g_signal_connect_after_always(), but I can't
1520    * find that, so we do this complex 'first-call-parent-then-do-actual-
1521    * action' thingy...
1522    */
1523   gtk_device_grab_add (button->priv->dock, event->device, TRUE);
1524
1525   return res;
1526 }
1527
1528 static void
1529 gtk_scale_button_update_icon (GtkScaleButton *button)
1530 {
1531   GtkScaleButtonPrivate *priv;
1532   GtkRange *range;
1533   GtkAdjustment *adj;
1534   gdouble value;
1535   const gchar *name;
1536   guint num_icons;
1537
1538   priv = button->priv;
1539
1540   if (!priv->icon_list || priv->icon_list[0] == '\0')
1541     {
1542       gtk_image_set_from_stock (GTK_IMAGE (priv->image),
1543                                 GTK_STOCK_MISSING_IMAGE,
1544                                 priv->size);
1545       return;
1546     }
1547
1548   num_icons = g_strv_length (priv->icon_list);
1549
1550   /* The 1-icon special case */
1551   if (num_icons == 1)
1552     {
1553       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1554                                     priv->icon_list[0],
1555                                     priv->size);
1556       return;
1557     }
1558
1559   range = GTK_RANGE (priv->scale);
1560   adj = priv->adjustment;
1561   value = gtk_scale_button_get_value (button);
1562
1563   /* The 2-icons special case */
1564   if (num_icons == 2)
1565     {
1566       gdouble limit;
1567       limit = (adj->upper - adj->lower) / 2 + adj->lower;
1568       if (value < limit)
1569         name = priv->icon_list[0];
1570       else
1571         name = priv->icon_list[1];
1572
1573       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1574                                     name,
1575                                     priv->size);
1576       return;
1577     }
1578
1579   /* With 3 or more icons */
1580   if (value == adj->lower)
1581     {
1582       name = priv->icon_list[0];
1583     }
1584   else if (value == adj->upper)
1585     {
1586       name = priv->icon_list[1];
1587     }
1588   else
1589     {
1590       gdouble step;
1591       guint i;
1592
1593       step = (adj->upper - adj->lower) / (num_icons - 2);
1594       i = (guint) ((value - adj->lower) / step) + 2;
1595       g_assert (i < num_icons);
1596       name = priv->icon_list[i];
1597     }
1598
1599   gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1600                                 name,
1601                                 priv->size);
1602 }
1603
1604 static void
1605 gtk_scale_button_scale_value_changed (GtkRange *range)
1606 {
1607   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (range)->button;
1608   gdouble value;
1609
1610   value = gtk_range_get_value (range);
1611
1612   gtk_scale_button_update_icon (button);
1613
1614   g_signal_emit (button, signals[VALUE_CHANGED], 0, value);
1615   g_object_notify (G_OBJECT (button), "value");
1616 }