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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2005 Ronald S. Bultje
   3  * Copyright (C) 2006, 2007 Christian Persch
   4  * Copyright (C) 2006 Jan Arne Petersen
   5  * Copyright (C) 2005-2007 Red Hat, Inc.
   6  *
   7  * Authors:
   8  * - Ronald S. Bultje <rbultje@ronald.bitfreak.net>
   9  * - Bastien Nocera <bnocera@redhat.com>
  10  * - Jan Arne Petersen <jpetersen@jpetersen.org>
  11  * - Christian Persch <chpe@svn.gnome.org>
  12  *
  13  * This library is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2 of the License, or (at your option) any later version.
  17  *
  18  * This library is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with this library; if not, write to the
  25  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  26  * Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*
  30  * Modified by the GTK+ Team and others 2007.  See the AUTHORS
  31  * file for a list of people on the GTK+ Team.  See the ChangeLog
  32  * files for a list of changes.  These files are distributed with
  33  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  34  */
  35
  36 #include "config.h"
  37
  38 #ifndef _WIN32
  39 #define _GNU_SOURCE
  40 #endif
  41 #include <math.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #include "gtkbindings.h"
  46 #include "gtkframe.h"
  47 #include "gtkmain.h"
  48 #include "gtkmarshalers.h"
  49 #include "gtkorientable.h"
  50 #include "gtkprivate.h"
  51 #include "gtkscale.h"
  52 #include "gtkscalebutton.h"
  53 #include "gtkstock.h"
  54 #include "gtkvbox.h"
  55 #include "gtkwindow.h"
  56 #include "gtktypebuiltins.h"
  57 #include "gtkintl.h"
  58
  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) (array zero-terminated=1): a %NULL-terminated
 563  *         array of icon names, or %NULL if you want to set the list
 564  *         later with gtk_scale_button_set_icons()
 565  *
 566  * Creates a #GtkScaleButton, with a range between @min and @max, with
 567  * a stepping of @step.
 568  *
 569  * Return value: a new #GtkScaleButton
 570  *
 571  * Since: 2.12
 572  */
 573 GtkWidget *
 574 gtk_scale_button_new (GtkIconSize   size,
 575                       gdouble       min,
 576                       gdouble       max,
 577                       gdouble       step,
 578                       const gchar **icons)
 579 {
 580   GtkScaleButton *button;
 581   GtkAdjustment *adjustment;
 582
 583   adjustment = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
 584
 585   button = g_object_new (GTK_TYPE_SCALE_BUTTON,
 586                          "adjustment", adjustment,
 587                          "icons", icons,
 588                          "size", size,
 589                          NULL);
 590
 591   return GTK_WIDGET (button);
 592 }
 593
 594 /**
 595  * gtk_scale_button_get_value:
 596  * @button: a #GtkScaleButton
 597  *
 598  * Gets the current value of the scale button.
 599  *
 600  * Return value: current value of the scale button
 601  *
 602  * Since: 2.12
 603  */
 604 gdouble
 605 gtk_scale_button_get_value (GtkScaleButton * button)
 606 {
 607   GtkScaleButtonPrivate *priv;
 608
 609   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0);
 610
 611   priv = button->priv;
 612
 613   return gtk_adjustment_get_value (priv->adjustment);
 614 }
 615
 616 /**
 617  * gtk_scale_button_set_value:
 618  * @button: a #GtkScaleButton
 619  * @value: new value of the scale button
 620  *
 621  * Sets the current value of the scale; if the value is outside
 622  * the minimum or maximum range values, it will be clamped to fit
 623  * inside them. The scale button emits the #GtkScaleButton::value-changed
 624  * signal if the value changes.
 625  *
 626  * Since: 2.12
 627  */
 628 void
 629 gtk_scale_button_set_value (GtkScaleButton *button,
 630                             gdouble         value)
 631 {
 632   GtkScaleButtonPrivate *priv;
 633
 634   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 635
 636   priv = button->priv;
 637
 638   gtk_range_set_value (GTK_RANGE (priv->scale), value);
 639 }
 640
 641 /**
 642  * gtk_scale_button_set_icons:
 643  * @button: a #GtkScaleButton
 644  * @icons: (array zero-terminated=1): a %NULL-terminated array of icon names
 645  *
 646  * Sets the icons to be used by the scale button.
 647  * For details, see the #GtkScaleButton:icons property.
 648  *
 649  * Since: 2.12
 650  */
 651 void
 652 gtk_scale_button_set_icons (GtkScaleButton  *button,
 653                             const gchar    **icons)
 654 {
 655   GtkScaleButtonPrivate *priv;
 656   gchar **tmp;
 657
 658   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 659
 660   priv = button->priv;
 661
 662   tmp = priv->icon_list;
 663   priv->icon_list = g_strdupv ((gchar **) icons);
 664   g_strfreev (tmp);
 665   gtk_scale_button_update_icon (button);
 666
 667   g_object_notify (G_OBJECT (button), "icons");
 668 }
 669
 670 /**
 671  * gtk_scale_button_get_adjustment:
 672  * @button: a #GtkScaleButton
 673  *
 674  * Gets the #GtkAdjustment associated with the #GtkScaleButton's scale.
 675  * See gtk_range_get_adjustment() for details.
 676  *
 677  * Returns: (transfer none): the adjustment associated with the scale
 678  *
 679  * Since: 2.12
 680  */
 681 GtkAdjustment*
 682 gtk_scale_button_get_adjustment (GtkScaleButton *button)
 683 {
 684   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 685
 686   return button->priv->adjustment;
 687 }
 688
 689 /**
 690  * gtk_scale_button_set_adjustment:
 691  * @button: a #GtkScaleButton
 692  * @adjustment: a #GtkAdjustment
 693  *
 694  * Sets the #GtkAdjustment to be used as a model
 695  * for the #GtkScaleButton's scale.
 696  * See gtk_range_set_adjustment() for details.
 697  *
 698  * Since: 2.12
 699  */
 700 void
 701 gtk_scale_button_set_adjustment (GtkScaleButton *button,
 702                                  GtkAdjustment  *adjustment)
 703 {
 704   g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
 705
 706   if (!adjustment)
 707     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 708   else
 709     g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 710
 711   if (button->priv->adjustment != adjustment)
 712     {
 713       if (button->priv->adjustment)
 714         g_object_unref (button->priv->adjustment);
 715       button->priv->adjustment = g_object_ref_sink (adjustment);
 716
 717       if (button->priv->scale)
 718         gtk_range_set_adjustment (GTK_RANGE (button->priv->scale), adjustment);
 719
 720       g_object_notify (G_OBJECT (button), "adjustment");
 721     }
 722 }
 723
 724 /**
 725  * gtk_scale_button_get_plus_button:
 726  * @button: a #GtkScaleButton
 727  *
 728  * Retrieves the plus button of the #GtkScaleButton.
 729  *
 730  * Returns: (transfer none): the plus button of the #GtkScaleButton
 731  *
 732  * Since: 2.14
 733  */
 734 GtkWidget *
 735 gtk_scale_button_get_plus_button (GtkScaleButton *button)
 736 {
 737   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 738
 739   return button->priv->plus_button;
 740 }
 741
 742 /**
 743  * gtk_scale_button_get_minus_button:
 744  * @button: a #GtkScaleButton
 745  *
 746  * Retrieves the minus button of the #GtkScaleButton.
 747  *
 748  * Returns: (transfer none): the minus button of the #GtkScaleButton
 749  *
 750  * Since: 2.14
 751  */
 752 GtkWidget *
 753 gtk_scale_button_get_minus_button (GtkScaleButton *button)
 754 {
 755   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 756
 757   return button->priv->minus_button;
 758 }
 759
 760 /**
 761  * gtk_scale_button_get_popup:
 762  * @button: a #GtkScaleButton
 763  *
 764  * Retrieves the popup of the #GtkScaleButton.
 765  *
 766  * Returns: (transfer none): the popup of the #GtkScaleButton
 767  *
 768  * Since: 2.14
 769  */
 770 GtkWidget *
 771 gtk_scale_button_get_popup (GtkScaleButton *button)
 772 {
 773   g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
 774
 775   return button->priv->dock;
 776 }
 777
 778 static void
 779 gtk_scale_button_set_orientation_private (GtkScaleButton *button,
 780                                           GtkOrientation  orientation)
 781 {
 782   GtkScaleButtonPrivate *priv = button->priv;
 783
 784   if (orientation != priv->orientation)
 785     {
 786       priv->orientation = orientation;
 787
 788       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->box),
 789                                       orientation);
 790       gtk_container_child_set (GTK_CONTAINER (priv->box),
 791                                priv->plus_button,
 792                                "pack-type",
 793                                orientation == GTK_ORIENTATION_VERTICAL ?
 794                                GTK_PACK_START : GTK_PACK_END,
 795                                NULL);
 796       gtk_container_child_set (GTK_CONTAINER (priv->box),
 797                                priv->minus_button,
 798                                "pack-type",
 799                                orientation == GTK_ORIENTATION_VERTICAL ?
 800                                GTK_PACK_END : GTK_PACK_START,
 801                                NULL);
 802
 803       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->scale),
 804                                       orientation);
 805
 806       if (orientation == GTK_ORIENTATION_VERTICAL)
 807         {
 808           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 809                                        -1, SCALE_SIZE);
 810           gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
 811         }
 812       else
 813         {
 814           gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
 815                                        SCALE_SIZE, -1);
 816           gtk_range_set_inverted (GTK_RANGE (priv->scale), FALSE);
 817         }
 818
 819       /* FIXME: without this, the popup window appears as a square
 820        * after changing the orientation
 821        */
 822       gtk_window_resize (GTK_WINDOW (priv->dock), 1, 1);
 823
 824       g_object_notify (G_OBJECT (button), "orientation");
 825     }
 826 }
 827
 828 /*
 829  * button callbacks.
 830  */
 831
 832 static gboolean
 833 gtk_scale_button_scroll (GtkWidget      *widget,
 834                          GdkEventScroll *event)
 835 {
 836   GtkScaleButton *button;
 837   GtkScaleButtonPrivate *priv;
 838   GtkAdjustment *adjustment;
 839   gdouble d;
 840
 841   button = GTK_SCALE_BUTTON (widget);
 842   priv = button->priv;
 843   adjustment = priv->adjustment;
 844
 845   if (event->type != GDK_SCROLL)
 846     return FALSE;
 847
 848   d = gtk_scale_button_get_value (button);
 849   if (event->direction == GDK_SCROLL_UP)
 850     {
 851       d += gtk_adjustment_get_step_increment (adjustment);
 852       if (d > gtk_adjustment_get_upper (adjustment))
 853         d = gtk_adjustment_get_upper (adjustment);
 854     }
 855   else
 856     {
 857       d -= gtk_adjustment_get_step_increment (adjustment);
 858       if (d < gtk_adjustment_get_lower (adjustment))
 859         d = gtk_adjustment_get_lower (adjustment);
 860     }
 861   gtk_scale_button_set_value (button, d);
 862
 863   return TRUE;
 864 }
 865
 866 static void
 867 gtk_scale_button_screen_changed (GtkWidget *widget,
 868                                  GdkScreen *previous_screen)
 869 {
 870   GtkScaleButton *button = (GtkScaleButton *) widget;
 871   GtkScaleButtonPrivate *priv;
 872   GdkScreen *screen;
 873   GValue value = { 0, };
 874
 875   if (gtk_widget_has_screen (widget) == FALSE)
 876     return;
 877
 878   priv = button->priv;
 879
 880   screen = gtk_widget_get_screen (widget);
 881   g_value_init (&value, G_TYPE_INT);
 882   if (gdk_screen_get_setting (screen,
 883                               "gtk-double-click-time",
 884                               &value) == FALSE)
 885     {
 886       priv->click_timeout = CLICK_TIMEOUT;
 887       return;
 888     }
 889
 890   priv->click_timeout = g_value_get_int (&value);
 891 }
 892
 893 static gboolean
 894 gtk_scale_popup (GtkWidget *widget,
 895                  GdkEvent  *event,
 896                  guint32    time)
 897 {
 898   GtkAllocation allocation, dock_allocation, scale_allocation;
 899   GtkScaleButton *button;
 900   GtkScaleButtonPrivate *priv;
 901   GtkAdjustment *adjustment;
 902   gint x, y, m, dx, dy, sx, sy, startoff;
 903   gint min_slider_size;
 904   gdouble v;
 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   adjustment = priv->adjustment;
 913
 914   screen = gtk_widget_get_screen (widget);
 915   gtk_widget_get_allocation (widget, &allocation);
 916
 917   /* position roughly */
 918   gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
 919
 920   gdk_window_get_origin (gtk_widget_get_window (widget),
 921                          &x, &y);
 922   x += allocation.x;
 923   y += allocation.y;
 924
 925   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 926     gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
 927   else
 928     gtk_window_move (GTK_WINDOW (priv->dock), x - (SCALE_SIZE / 2), y);
 929
 930   gtk_widget_show_all (priv->dock);
 931
 932   gdk_window_get_origin (gtk_widget_get_window (priv->dock),
 933                          &dx, &dy);
 934   gtk_widget_get_allocation (priv->dock, &dock_allocation);
 935   dx += dock_allocation.x;
 936   dy += dock_allocation.y;
 937
 938
 939   gdk_window_get_origin (gtk_widget_get_window (priv->scale),
 940                          &sx, &sy);
 941   gtk_widget_get_allocation (priv->scale, &scale_allocation);
 942   sx += scale_allocation.x;
 943   sy += scale_allocation.y;
 944
 945   priv->timeout = TRUE;
 946
 947   /* position (needs widget to be shown already) */
 948   v = gtk_scale_button_get_value (button) / (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment));
 949   min_slider_size = gtk_range_get_min_slider_size (GTK_RANGE (priv->scale));
 950
 951   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 952     {
 953       startoff = sy - dy;
 954
 955       x += (allocation.width - dock_allocation.width) / 2;
 956       y -= startoff;
 957       y -= min_slider_size / 2;
 958       m = scale_allocation.height - min_slider_size;
 959       y -= m * (1.0 - v);
 960     }
 961   else
 962     {
 963       startoff = sx - dx;
 964
 965       x -= startoff;
 966       y += (allocation.height - dock_allocation.height) / 2;
 967       x -= min_slider_size / 2;
 968       m = scale_allocation.width - min_slider_size;
 969       x -= m * v;
 970     }
 971
 972   /* Make sure the dock stays inside the monitor */
 973   if (event->type == GDK_BUTTON_PRESS)
 974     {
 975       GtkAllocation d_allocation;
 976       int monitor;
 977       GdkEventButton *button_event = (GdkEventButton *) event;
 978       GdkRectangle rect;
 979       GtkWidget *d;
 980
 981       d = GTK_WIDGET (priv->dock);
 982       monitor = gdk_screen_get_monitor_at_point (screen,
 983                                                  button_event->x_root,
 984                                                  button_event->y_root);
 985       gdk_screen_get_monitor_geometry (screen, monitor, &rect);
 986
 987       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
 988         y += button_event->y;
 989       else
 990         x += button_event->x;
 991
 992       /* Move the dock, but set is_moved so we
 993        * don't forward the first click later on,
 994        * as it could make the scale go to the bottom */
 995       gtk_widget_get_allocation (d, &d_allocation);
 996       if (y < rect.y)
 997         {
 998           y = rect.y;
 999           is_moved = TRUE;
1000         }
1001       else if (y + d_allocation.height > rect.height + rect.y)
1002         {
1003           y = rect.y + rect.height - d_allocation.height;
1004           is_moved = TRUE;
1005         }
1006
1007       if (x < rect.x)
1008         {
1009           x = rect.x;
1010           is_moved = TRUE;
1011         }
1012       else if (x + d_allocation.width > rect.width + rect.x)
1013         {
1014           x = rect.x + rect.width - d_allocation.width;
1015           is_moved = TRUE;
1016         }
1017     }
1018
1019   gtk_window_move (GTK_WINDOW (priv->dock), x, y);
1020
1021   if (event->type == GDK_BUTTON_PRESS)
1022     GTK_WIDGET_CLASS (gtk_scale_button_parent_class)->button_press_event (widget, (GdkEventButton *) event);
1023
1024   device = gdk_event_get_device (event);
1025
1026   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
1027     {
1028       keyboard = device;
1029       pointer = gdk_device_get_associated_device (device);
1030     }
1031   else
1032     {
1033       pointer = device;
1034       keyboard = gdk_device_get_associated_device (device);
1035     }
1036
1037   /* grab focus */
1038   gtk_device_grab_add (priv->dock, pointer, TRUE);
1039
1040   if (gdk_device_grab (pointer, gtk_widget_get_window (priv->dock),
1041                        GDK_OWNERSHIP_WINDOW, TRUE,
1042                        GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1043                        GDK_POINTER_MOTION_MASK, NULL, time) != GDK_GRAB_SUCCESS)
1044     {
1045       gtk_device_grab_remove (priv->dock, pointer);
1046       gtk_widget_hide (priv->dock);
1047       return FALSE;
1048     }
1049
1050   if (gdk_device_grab (keyboard, gtk_widget_get_window (priv->dock),
1051                        GDK_OWNERSHIP_WINDOW, TRUE,
1052                        GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
1053                        NULL, time) != GDK_GRAB_SUCCESS)
1054     {
1055       gdk_device_ungrab (pointer, time);
1056       gtk_device_grab_remove (priv->dock, pointer);
1057       gtk_widget_hide (priv->dock);
1058       return FALSE;
1059     }
1060
1061   gtk_widget_grab_focus (priv->dock);
1062   priv->grab_keyboard = keyboard;
1063   priv->grab_pointer = pointer;
1064
1065   if (event->type == GDK_BUTTON_PRESS && !is_moved)
1066     {
1067       GdkEventButton *e;
1068       GdkEventButton *button_event = (GdkEventButton *) event;
1069
1070       /* forward event to the slider */
1071       e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1072       e->window = gtk_widget_get_window (priv->scale);
1073
1074       /* position: the X position isn't relevant, halfway will work just fine.
1075        * The vertical position should be *exactly* in the middle of the slider
1076        * of the scale; if we don't do that correctly, it'll move from its current
1077        * position, which means a position change on-click, which is bad.
1078        */
1079       gtk_widget_get_allocation (priv->scale, &scale_allocation);
1080       if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1081         {
1082           e->x = scale_allocation.width / 2;
1083           m = scale_allocation.height - min_slider_size;
1084           e->y = ((1.0 - v) * m) + min_slider_size / 2;
1085         }
1086       else
1087         {
1088           e->y = scale_allocation.height / 2;
1089           m = scale_allocation.width - min_slider_size;
1090           e->x = (v * m) + min_slider_size / 2;
1091         }
1092
1093       gtk_widget_event (priv->scale, (GdkEvent *) e);
1094       e->window = button_event->window;
1095       gdk_event_free ((GdkEvent *) e);
1096     }
1097
1098   gtk_widget_grab_focus (priv->scale);
1099
1100   priv->pop_time = time;
1101
1102   return TRUE;
1103 }
1104
1105 static gboolean
1106 gtk_scale_button_press (GtkWidget      *widget,
1107                         GdkEventButton *event)
1108 {
1109   return gtk_scale_popup (widget, (GdkEvent *) event, event->time);
1110 }
1111
1112 static void
1113 gtk_scale_button_popup (GtkWidget *widget)
1114 {
1115   GdkEvent *ev;
1116
1117   /* This is a callback for a keybinding signal,
1118    * current event should  be the key event that
1119    * triggered it.
1120    */
1121   ev = gtk_get_current_event ();
1122
1123   if (ev->type != GDK_KEY_PRESS &&
1124       ev->type != GDK_KEY_RELEASE)
1125     {
1126       gdk_event_free (ev);
1127       ev = gdk_event_new (GDK_KEY_RELEASE);
1128       ev->key.time = GDK_CURRENT_TIME;
1129     }
1130
1131   gtk_scale_popup (widget, ev, ev->key.time);
1132   gdk_event_free (ev);
1133 }
1134
1135 static gboolean
1136 gtk_scale_button_key_release (GtkWidget   *widget,
1137                               GdkEventKey *event)
1138 {
1139   return gtk_bindings_activate_event (G_OBJECT (widget), event);
1140 }
1141
1142 /* This is called when the grab is broken for
1143  * either the dock, or the scale itself */
1144 static void
1145 gtk_scale_button_grab_notify (GtkScaleButton *button,
1146                               gboolean        was_grabbed)
1147 {
1148   GtkScaleButtonPrivate *priv;
1149   GtkWidget *toplevel, *grab_widget;
1150   GtkWindowGroup *group;
1151
1152   priv = button->priv;
1153
1154   if (!priv->grab_pointer ||
1155       !gtk_widget_device_is_shadowed (GTK_WIDGET (button), priv->grab_pointer))
1156     return;
1157
1158   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
1159
1160   if (GTK_IS_WINDOW (toplevel))
1161     group = gtk_window_get_group (GTK_WINDOW (toplevel));
1162   else
1163     group = gtk_window_get_group (NULL);
1164
1165   grab_widget = gtk_window_group_get_current_device_grab (group, priv->grab_pointer);
1166
1167   if (grab_widget &&
1168       gtk_widget_is_ancestor (grab_widget, priv->dock))
1169     return;
1170
1171   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1172   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1173   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1174
1175   priv->grab_keyboard = NULL;
1176   priv->grab_pointer = NULL;
1177
1178   /* hide again */
1179   gtk_widget_hide (priv->dock);
1180   priv->timeout = FALSE;
1181 }
1182
1183 /*
1184  * +/- button callbacks.
1185  */
1186
1187 static gboolean
1188 cb_button_timeout (gpointer user_data)
1189 {
1190   GtkScaleButton *button;
1191   GtkScaleButtonPrivate *priv;
1192   GtkAdjustment *adjustment;
1193   gdouble val;
1194   gboolean res = TRUE;
1195
1196   button = GTK_SCALE_BUTTON (user_data);
1197   priv = button->priv;
1198
1199   if (priv->click_id == 0)
1200     return FALSE;
1201
1202   adjustment = priv->adjustment;
1203
1204   val = gtk_scale_button_get_value (button);
1205   val += priv->direction;
1206   if (val <= gtk_adjustment_get_lower (adjustment))
1207     {
1208       res = FALSE;
1209       val = gtk_adjustment_get_lower (adjustment);
1210     }
1211   else if (val > gtk_adjustment_get_upper (adjustment))
1212     {
1213       res = FALSE;
1214       val = gtk_adjustment_get_upper (adjustment);
1215     }
1216   gtk_scale_button_set_value (button, val);
1217
1218   if (!res)
1219     {
1220       g_source_remove (priv->click_id);
1221       priv->click_id = 0;
1222     }
1223
1224   return res;
1225 }
1226
1227 static gboolean
1228 cb_button_press (GtkWidget      *widget,
1229                  GdkEventButton *event,
1230                  gpointer        user_data)
1231 {
1232   GtkScaleButton *button;
1233   GtkScaleButtonPrivate *priv;
1234   GtkAdjustment *adjustment;
1235
1236   button = GTK_SCALE_BUTTON (user_data);
1237   priv = button->priv;
1238   adjustment = priv->adjustment;
1239
1240   if (priv->click_id != 0)
1241     g_source_remove (priv->click_id);
1242
1243   if (widget == priv->plus_button)
1244     priv->direction = fabs (gtk_adjustment_get_page_increment (adjustment));
1245   else
1246     priv->direction = - fabs (gtk_adjustment_get_page_increment (adjustment));
1247
1248   priv->click_id = gdk_threads_add_timeout (priv->click_timeout,
1249                                             cb_button_timeout,
1250                                             button);
1251   cb_button_timeout (button);
1252
1253   return TRUE;
1254 }
1255
1256 static gboolean
1257 cb_button_release (GtkWidget      *widget,
1258                    GdkEventButton *event,
1259                    gpointer        user_data)
1260 {
1261   GtkScaleButton *button;
1262   GtkScaleButtonPrivate *priv;
1263
1264   button = GTK_SCALE_BUTTON (user_data);
1265   priv = button->priv;
1266
1267   if (priv->click_id != 0)
1268     {
1269       g_source_remove (priv->click_id);
1270       priv->click_id = 0;
1271     }
1272
1273   return TRUE;
1274 }
1275
1276 static void
1277 cb_dock_grab_notify (GtkWidget *widget,
1278                      gboolean   was_grabbed,
1279                      gpointer   user_data)
1280 {
1281   GtkScaleButton *button = (GtkScaleButton *) user_data;
1282
1283   gtk_scale_button_grab_notify (button, was_grabbed);
1284 }
1285
1286 static gboolean
1287 cb_dock_grab_broken_event (GtkWidget *widget,
1288                            gboolean   was_grabbed,
1289                            gpointer   user_data)
1290 {
1291   GtkScaleButton *button = (GtkScaleButton *) user_data;
1292
1293   gtk_scale_button_grab_notify (button, FALSE);
1294
1295   return FALSE;
1296 }
1297
1298 /* Scale callbacks  */
1299
1300 static void
1301 gtk_scale_button_release_grab (GtkScaleButton *button,
1302                                GdkEventButton *event)
1303 {
1304   GdkEventButton *e;
1305   GtkScaleButtonPrivate *priv;
1306
1307   priv = button->priv;
1308
1309   /* ungrab focus */
1310   gdk_device_ungrab (priv->grab_keyboard, event->time);
1311   gdk_device_ungrab (priv->grab_pointer, event->time);
1312   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1313
1314   priv->grab_keyboard = NULL;
1315   priv->grab_pointer = NULL;
1316
1317   /* hide again */
1318   gtk_widget_hide (priv->dock);
1319   priv->timeout = FALSE;
1320
1321   e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
1322   e->window = gtk_widget_get_window (GTK_WIDGET (button));
1323   e->type = GDK_BUTTON_RELEASE;
1324   gtk_widget_event (GTK_WIDGET (button), (GdkEvent *) e);
1325   e->window = event->window;
1326   gdk_event_free ((GdkEvent *) e);
1327 }
1328
1329 static gboolean
1330 cb_dock_button_press (GtkWidget      *widget,
1331                       GdkEventButton *event,
1332                       gpointer        user_data)
1333 {
1334   GtkScaleButton *button = GTK_SCALE_BUTTON (user_data);
1335
1336   if (event->type == GDK_BUTTON_PRESS)
1337     {
1338       gtk_scale_button_release_grab (button, event);
1339       return TRUE;
1340     }
1341
1342   return FALSE;
1343 }
1344
1345 static void
1346 gtk_scale_button_popdown (GtkWidget *widget)
1347 {
1348   GtkScaleButton *button;
1349   GtkScaleButtonPrivate *priv;
1350
1351   button = GTK_SCALE_BUTTON (widget);
1352   priv = button->priv;
1353
1354   /* ungrab focus */
1355   gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
1356   gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
1357   gtk_device_grab_remove (priv->dock, priv->grab_pointer);
1358
1359   priv->grab_keyboard = NULL;
1360   priv->grab_pointer = NULL;
1361
1362   /* hide again */
1363   gtk_widget_hide (priv->dock);
1364   priv->timeout = FALSE;
1365 }
1366
1367 static gboolean
1368 cb_dock_key_release (GtkWidget   *widget,
1369                      GdkEventKey *event,
1370                      gpointer     user_data)
1371 {
1372   if (event->keyval == GDK_KEY_Escape)
1373     {
1374       gtk_scale_button_popdown (GTK_WIDGET (user_data));
1375       return TRUE;
1376     }
1377
1378   if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
1379     {
1380       /* The popup hasn't managed the event, pass onto the button */
1381       gtk_bindings_activate_event (G_OBJECT (user_data), event);
1382     }
1383
1384   return TRUE;
1385 }
1386
1387 static void
1388 cb_scale_grab_notify (GtkWidget *widget,
1389                       gboolean   was_grabbed,
1390                       gpointer   user_data)
1391 {
1392   GtkScaleButton *button = (GtkScaleButton *) user_data;
1393
1394   gtk_scale_button_grab_notify (button, was_grabbed);
1395 }
1396
1397 /*
1398  * Scale stuff.
1399  */
1400
1401 #define GTK_TYPE_SCALE_BUTTON_SCALE    (_gtk_scale_button_scale_get_type ())
1402 #define GTK_SCALE_BUTTON_SCALE(obj)    (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON_SCALE, GtkScaleButtonScale))
1403 #define GTK_IS_SCALE_BUTTON_SCALE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SCALE_BUTTON_SCALE))
1404
1405 typedef struct _GtkScaleButtonScale
1406 {
1407   GtkScale parent_instance;
1408   GtkScaleButton *button;
1409 } GtkScaleButtonScale;
1410
1411 typedef struct _GtkScaleButtonScaleClass
1412 {
1413   GtkScaleClass parent_class;
1414 } GtkScaleButtonScaleClass;
1415
1416 static gboolean gtk_scale_button_scale_press   (GtkWidget      *widget,
1417                                                 GdkEventButton *event);
1418 static gboolean gtk_scale_button_scale_release (GtkWidget      *widget,
1419                                                 GdkEventButton *event);
1420
1421 G_DEFINE_TYPE (GtkScaleButtonScale, _gtk_scale_button_scale, GTK_TYPE_SCALE)
1422
1423 static void
1424 _gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
1425 {
1426   GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
1427   GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
1428
1429   gtkwidget_class->button_press_event = gtk_scale_button_scale_press;
1430   gtkwidget_class->button_release_event = gtk_scale_button_scale_release;
1431   gtkrange_class->value_changed = gtk_scale_button_scale_value_changed;
1432 }
1433
1434 static void
1435 _gtk_scale_button_scale_init (GtkScaleButtonScale *scale)
1436 {
1437 }
1438
1439 static GtkWidget *
1440 gtk_scale_button_scale_new (GtkScaleButton *button)
1441 {
1442   GtkScaleButtonPrivate *priv = button->priv;
1443   GtkScaleButtonScale *scale;
1444
1445   scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE,
1446                         "orientation", priv->orientation,
1447                         "adjustment",  priv->adjustment,
1448                         "draw-value",  FALSE,
1449                         NULL);
1450
1451   scale->button = button;
1452
1453   g_signal_connect (scale, "grab-notify",
1454                     G_CALLBACK (cb_scale_grab_notify), button);
1455
1456   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
1457     {
1458       gtk_widget_set_size_request (GTK_WIDGET (scale), -1, SCALE_SIZE);
1459       gtk_range_set_inverted (GTK_RANGE (scale), TRUE);
1460     }
1461   else
1462     {
1463       gtk_widget_set_size_request (GTK_WIDGET (scale), SCALE_SIZE, -1);
1464       gtk_range_set_inverted (GTK_RANGE (scale), FALSE);
1465     }
1466
1467   return GTK_WIDGET (scale);
1468 }
1469
1470 static gboolean
1471 gtk_scale_button_scale_press (GtkWidget      *widget,
1472                               GdkEventButton *event)
1473 {
1474   GtkScaleButtonPrivate *priv = GTK_SCALE_BUTTON_SCALE (widget)->button->priv;
1475
1476   /* the scale will grab input; if we have input grabbed, all goes
1477    * horribly wrong, so let's not do that.
1478    */
1479   gtk_device_grab_remove (priv->dock, event->device);
1480
1481   return GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_press_event (widget, event);
1482 }
1483
1484 static gboolean
1485 gtk_scale_button_scale_release (GtkWidget      *widget,
1486                                 GdkEventButton *event)
1487 {
1488   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (widget)->button;
1489   gboolean res;
1490
1491   if (button->priv->timeout)
1492     {
1493       /* if we did a quick click, leave the window open; else, hide it */
1494       if (event->time > button->priv->pop_time + button->priv->click_timeout)
1495         {
1496
1497           gtk_scale_button_release_grab (button, event);
1498           GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1499
1500           return TRUE;
1501         }
1502
1503       button->priv->timeout = FALSE;
1504     }
1505
1506   res = GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
1507
1508   /* the scale will release input; right after that, we *have to* grab
1509    * it back so we can catch out-of-scale clicks and hide the popup,
1510    * so I basically want a g_signal_connect_after_always(), but I can't
1511    * find that, so we do this complex 'first-call-parent-then-do-actual-
1512    * action' thingy...
1513    */
1514   gtk_device_grab_add (button->priv->dock, event->device, TRUE);
1515
1516   return res;
1517 }
1518
1519 static void
1520 gtk_scale_button_update_icon (GtkScaleButton *button)
1521 {
1522   GtkScaleButtonPrivate *priv;
1523   GtkAdjustment *adjustment;
1524   gdouble value;
1525   const gchar *name;
1526   guint num_icons;
1527
1528   priv = button->priv;
1529
1530   if (!priv->icon_list || priv->icon_list[0] == '\0')
1531     {
1532       gtk_image_set_from_stock (GTK_IMAGE (priv->image),
1533                                 GTK_STOCK_MISSING_IMAGE,
1534                                 priv->size);
1535       return;
1536     }
1537
1538   num_icons = g_strv_length (priv->icon_list);
1539
1540   /* The 1-icon special case */
1541   if (num_icons == 1)
1542     {
1543       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1544                                     priv->icon_list[0],
1545                                     priv->size);
1546       return;
1547     }
1548
1549   adjustment = priv->adjustment;
1550   value = gtk_scale_button_get_value (button);
1551
1552   /* The 2-icons special case */
1553   if (num_icons == 2)
1554     {
1555       gdouble limit;
1556
1557       limit = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / 2 + gtk_adjustment_get_lower (adjustment);
1558       if (value < limit)
1559         name = priv->icon_list[0];
1560       else
1561         name = priv->icon_list[1];
1562
1563       gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1564                                     name,
1565                                     priv->size);
1566       return;
1567     }
1568
1569   /* With 3 or more icons */
1570   if (value == gtk_adjustment_get_lower (adjustment))
1571     {
1572       name = priv->icon_list[0];
1573     }
1574   else if (value == gtk_adjustment_get_upper (adjustment))
1575     {
1576       name = priv->icon_list[1];
1577     }
1578   else
1579     {
1580       gdouble step;
1581       guint i;
1582
1583       step = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / (num_icons - 2);
1584       i = (guint) ((value - gtk_adjustment_get_lower (adjustment)) / step) + 2;
1585       g_assert (i < num_icons);
1586       name = priv->icon_list[i];
1587     }
1588
1589   gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
1590                                 name,
1591                                 priv->size);
1592 }
1593
1594 static void
1595 gtk_scale_button_scale_value_changed (GtkRange *range)
1596 {
1597   GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (range)->button;
1598   gdouble value;
1599
1600   value = gtk_range_get_value (range);
1601
1602   gtk_scale_button_update_icon (button);
1603
1604   g_signal_emit (button, signals[VALUE_CHANGED], 0, value);
1605   g_object_notify (G_OBJECT (button), "value");
1606 }