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

   1 /*
   2  * gtkinfobar.c
   3  * This file is part of GTK+
   4  *
   5  * Copyright (C) 2005 - Paolo Maggi
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24  * Modified by the gedit Team, 2005. See the AUTHORS file for a
  25  * list of people on the gtk Team.
  26  * See the gedit ChangeLog files for a list of changes.
  27  *
  28  * Modified by the GTK+ team, 2008-2009.
  29  */
  30
  31
  32 #include "config.h"
  33
  34 #include <stdlib.h>
  35
  36 #include "gtkinfobar.h"
  37 #include "gtkaccessible.h"
  38 #include "gtkbuildable.h"
  39 #include "gtkbox.h"
  40 #include "gtkvbbox.h"
  41 #include "gtklabel.h"
  42 #include "gtkbutton.h"
  43 #include "gtkenums.h"
  44 #include "gtkbindings.h"
  45 #include "gtkdialog.h"
  46 #include "gtkintl.h"
  47 #include "gtkprivate.h"
  48 #include "gtkstock.h"
  49 #include "gtktypebuiltins.h"
  50
  51 /**
  52  * SECTION:gtkinfobar
  53  * @short_description: Report important messages to the user
  54  * @include: gtk/gtk.h
  55  * @see_also: #GtkStatusbar, #GtkMessageDialog
  56  *
  57  * #GtkInfoBar is a widget that can be used to show messages to
  58  * the user without showing a dialog. It is often temporarily shown
  59  * at the top or bottom of a document. In contrast to #GtkDialog, which
  60  * has a horizontal action area at the bottom, #GtkInfoBar has a
  61  * vertical action area at the side.
  62  *
  63  * The API of #GtkInfoBar is very similar to #GtkDialog, allowing you
  64  * to add buttons to the action area with gtk_info_bar_add_button() or
  65  * gtk_info_bar_new_with_buttons(). The sensitivity of action widgets
  66  * can be controlled with gtk_info_bar_set_response_sensitive().
  67  * To add widgets to the main content area of a #GtkInfoBar, use
  68  * gtk_info_bar_get_content_area() and add your widgets to the container.
  69  *
  70  * Similar to #GtkMessageDialog, the contents of a #GtkInfoBar can by
  71  * classified as error message, warning, informational message, etc,
  72  * by using gtk_info_bar_set_message_type(). GTK+ uses the message type
  73  * to determine the background color of the message area.
  74  *
  75  * <example>
  76  * <title>Simple GtkInfoBar usage.</title>
  77  * <programlisting>
  78  * /&ast; set up info bar &ast;/
  79  * info_bar = gtk_info_bar_new ();
  80  * gtk_widget_set_no_show_all (info_bar, TRUE);
  81  * message_label = gtk_label_new ("");
  82  * gtk_widget_show (message_label);
  83  * content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar));
  84  * gtk_container_add (GTK_CONTAINER (content_area), message_label);
  85  * gtk_info_bar_add_button (GTK_INFO_BAR (info_bar),
  86  *                          GTK_STOCK_OK, GTK_RESPONSE_OK);
  87  * g_signal_connect (info_bar, "response",
  88  *                   G_CALLBACK (gtk_widget_hide), NULL);
  89  * gtk_table_attach (GTK_TABLE (table),
  90  *                   info_bar,
  91  *                   0, 1, 2, 3,
  92  *                   GTK_EXPAND | GTK_FILL,  0,
  93  *                   0,                      0);
  94  *
  95  * /&ast; ... &ast;/
  96  *
  97  * /&ast; show an error message &ast;/
  98  * gtk_label_set_text (GTK_LABEL (message_label), error_message);
  99  * gtk_info_bar_set_message_type (GTK_INFO_BAR (info_bar),
 100  *                                GTK_MESSAGE_ERROR);
 101  * gtk_widget_show (info_bar);
 102  * </programlisting>
 103  * </example>
 104  *
 105  * <refsect2 id="GtkInfoBar-BUILDER-UI">
 106  * <title>GtkInfoBar as GtkBuildable</title>
 107  * <para>
 108  * The GtkInfoBar implementation of the GtkBuildable interface exposes
 109  * the content area and action area as internal children with the names
 110  * "content_area" and "action_area".
 111  * </para>
 112  * <para>
 113  * GtkInfoBar supports a custom &lt;action-widgets&gt; element, which
 114  * can contain multiple &lt;action-widget&gt; elements. The "response"
 115  * attribute specifies a numeric response, and the content of the element
 116  * is the id of widget (which should be a child of the dialogs @action_area).
 117  * </para>
 118  * </refsect2>
 119  */
 120
 121 enum
 122 {
 123   PROP_0,
 124   PROP_MESSAGE_TYPE
 125 };
 126
 127 struct _GtkInfoBarPrivate
 128 {
 129   GtkWidget *content_area;
 130   GtkWidget *action_area;
 131
 132   GtkMessageType message_type;
 133 };
 134
 135 typedef struct _ResponseData ResponseData;
 136
 137 struct _ResponseData
 138 {
 139   gint response_id;
 140 };
 141
 142 enum
 143 {
 144   RESPONSE,
 145   CLOSE,
 146   LAST_SIGNAL
 147 };
 148
 149 static guint signals[LAST_SIGNAL];
 150
 151
 152 static void     gtk_info_bar_set_property (GObject        *object,
 153                                            guint           prop_id,
 154                                            const GValue   *value,
 155                                            GParamSpec     *pspec);
 156 static void     gtk_info_bar_get_property (GObject        *object,
 157                                            guint           prop_id,
 158                                            GValue         *value,
 159                                            GParamSpec     *pspec);
 160 static void     gtk_info_bar_style_updated (GtkWidget      *widget);
 161 static gboolean gtk_info_bar_draw         (GtkWidget      *widget,
 162                                            cairo_t        *cr);
 163 static void     gtk_info_bar_buildable_interface_init     (GtkBuildableIface *iface);
 164 static GObject *gtk_info_bar_buildable_get_internal_child (GtkBuildable  *buildable,
 165                                                            GtkBuilder    *builder,
 166                                                            const gchar   *childname);
 167 static gboolean  gtk_info_bar_buildable_custom_tag_start   (GtkBuildable  *buildable,
 168                                                             GtkBuilder    *builder,
 169                                                             GObject       *child,
 170                                                             const gchar   *tagname,
 171                                                             GMarkupParser *parser,
 172                                                             gpointer      *data);
 173 static void      gtk_info_bar_buildable_custom_finished    (GtkBuildable  *buildable,
 174                                                             GtkBuilder    *builder,
 175                                                             GObject       *child,
 176                                                             const gchar   *tagname,
 177                                                             gpointer       user_data);
 178
 179
 180 G_DEFINE_TYPE_WITH_CODE (GtkInfoBar, gtk_info_bar, GTK_TYPE_HBOX,
 181                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 182                                                 gtk_info_bar_buildable_interface_init))
 183
 184 static void
 185 gtk_info_bar_set_property (GObject      *object,
 186                            guint         prop_id,
 187                            const GValue *value,
 188                            GParamSpec   *pspec)
 189 {
 190   GtkInfoBar *info_bar;
 191   GtkInfoBarPrivate *priv;
 192
 193   info_bar = GTK_INFO_BAR (object);
 194   priv = info_bar->priv;
 195
 196   switch (prop_id)
 197     {
 198     case PROP_MESSAGE_TYPE:
 199       gtk_info_bar_set_message_type (info_bar, g_value_get_enum (value));
 200       break;
 201     default:
 202       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 203       break;
 204     }
 205 }
 206
 207 static void
 208 gtk_info_bar_get_property (GObject    *object,
 209                            guint       prop_id,
 210                            GValue     *value,
 211                            GParamSpec *pspec)
 212 {
 213   GtkInfoBar *info_bar;
 214   GtkInfoBarPrivate *priv;
 215
 216   info_bar = GTK_INFO_BAR (object);
 217   priv = info_bar->priv;
 218
 219   switch (prop_id)
 220     {
 221     case PROP_MESSAGE_TYPE:
 222       g_value_set_enum (value, gtk_info_bar_get_message_type (info_bar));
 223       break;
 224     default:
 225       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 226       break;
 227     }
 228 }
 229
 230 static void
 231 gtk_info_bar_finalize (GObject *object)
 232 {
 233   G_OBJECT_CLASS (gtk_info_bar_parent_class)->finalize (object);
 234 }
 235
 236 static void
 237 response_data_free (gpointer data)
 238 {
 239   g_slice_free (ResponseData, data);
 240 }
 241
 242 static ResponseData *
 243 get_response_data (GtkWidget *widget,
 244                    gboolean   create)
 245 {
 246   ResponseData *ad = g_object_get_data (G_OBJECT (widget),
 247                                         "gtk-info-bar-response-data");
 248
 249   if (ad == NULL && create)
 250     {
 251       ad = g_slice_new (ResponseData);
 252
 253       g_object_set_data_full (G_OBJECT (widget),
 254                               I_("gtk-info-bar-response-data"),
 255                               ad,
 256                               response_data_free);
 257     }
 258
 259   return ad;
 260 }
 261
 262 static GtkWidget *
 263 find_button (GtkInfoBar *info_bar,
 264              gint        response_id)
 265 {
 266   GList *children, *list;
 267   GtkWidget *child = NULL;
 268
 269   children = gtk_container_get_children (GTK_CONTAINER (info_bar->priv->action_area));
 270
 271   for (list = children; list; list = list->next)
 272     {
 273       ResponseData *rd = get_response_data (list->data, FALSE);
 274
 275       if (rd && rd->response_id == response_id)
 276         {
 277           child = list->data;
 278           break;
 279         }
 280     }
 281
 282   g_list_free (children);
 283
 284   return child;
 285 }
 286
 287 static void
 288 gtk_info_bar_close (GtkInfoBar *info_bar)
 289 {
 290   if (!find_button (info_bar, GTK_RESPONSE_CANCEL))
 291     return;
 292
 293   gtk_info_bar_response (GTK_INFO_BAR (info_bar),
 294                          GTK_RESPONSE_CANCEL);
 295 }
 296
 297 static gboolean
 298 gtk_info_bar_draw (GtkWidget      *widget,
 299                    cairo_t        *cr)
 300 {
 301   GtkInfoBarPrivate *priv = GTK_INFO_BAR (widget)->priv;
 302   const char* type_class[] = {
 303     GTK_STYLE_CLASS_INFO,
 304     GTK_STYLE_CLASS_WARNING,
 305     GTK_STYLE_CLASS_QUESTION,
 306     GTK_STYLE_CLASS_ERROR,
 307     NULL
 308   };
 309
 310   if (priv->message_type != GTK_MESSAGE_OTHER)
 311     {
 312       GtkStyleContext *context;
 313
 314       context = gtk_widget_get_style_context (widget);
 315
 316       gtk_style_context_save (context);
 317
 318       if (type_class[priv->message_type])
 319         gtk_style_context_add_class (context,
 320                                      type_class[priv->message_type]);
 321
 322       gtk_render_background (context, cr, 0, 0,
 323                              gtk_widget_get_allocated_width (widget),
 324                              gtk_widget_get_allocated_height (widget));
 325       gtk_render_frame (context, cr, 0, 0,
 326                         gtk_widget_get_allocated_width (widget),
 327                         gtk_widget_get_allocated_height (widget));
 328
 329       gtk_style_context_restore (context);
 330     }
 331
 332   if (GTK_WIDGET_CLASS (gtk_info_bar_parent_class)->draw)
 333     GTK_WIDGET_CLASS (gtk_info_bar_parent_class)->draw (widget, cr);
 334
 335   return FALSE;
 336 }
 337
 338 static void
 339 gtk_info_bar_class_init (GtkInfoBarClass *klass)
 340 {
 341   GtkWidgetClass *widget_class;
 342   GObjectClass *object_class;
 343   GtkBindingSet *binding_set;
 344
 345   widget_class = GTK_WIDGET_CLASS (klass);
 346   object_class = G_OBJECT_CLASS (klass);
 347
 348   object_class->get_property = gtk_info_bar_get_property;
 349   object_class->set_property = gtk_info_bar_set_property;
 350   object_class->finalize = gtk_info_bar_finalize;
 351
 352   widget_class->style_updated = gtk_info_bar_style_updated;
 353   widget_class->draw = gtk_info_bar_draw;
 354
 355   klass->close = gtk_info_bar_close;
 356
 357   /**
 358    * GtkInfoBar:message-type:
 359    *
 360    * The type of the message.
 361    *
 362    * The type is used to determine the colors to use in the info bar.
 363    * The following symbolic color names can by used to customize
 364    * these colors:
 365    * "info_fg_color", "info_bg_color",
 366    * "warning_fg_color", "warning_bg_color",
 367    * "question_fg_color", "question_bg_color",
 368    * "error_fg_color", "error_bg_color".
 369    * "other_fg_color", "other_bg_color".
 370    *
 371    * If the type is #GTK_MESSAGE_OTHER, no info bar is painted but the
 372    * colors are still set.
 373    *
 374    * Since: 2.18
 375    */
 376   g_object_class_install_property (object_class,
 377                                    PROP_MESSAGE_TYPE,
 378                                    g_param_spec_enum ("message-type",
 379                                                       P_("Message Type"),
 380                                                       P_("The type of message"),
 381                                                       GTK_TYPE_MESSAGE_TYPE,
 382                                                       GTK_MESSAGE_INFO,
 383                                                       GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 384   /**
 385    * GtkInfoBar::response:
 386    * @info_bar: the object on which the signal is emitted
 387    * @response_id: the response ID
 388    *
 389    * Emitted when an action widget is clicked or the application programmer
 390    * calls gtk_dialog_response(). The @response_id depends on which action
 391    * widget was clicked.
 392    *
 393    * Since: 2.18
 394    */
 395   signals[RESPONSE] = g_signal_new (I_("response"),
 396                                     G_OBJECT_CLASS_TYPE (klass),
 397                                     G_SIGNAL_RUN_LAST,
 398                                     G_STRUCT_OFFSET (GtkInfoBarClass, response),
 399                                     NULL, NULL,
 400                                     g_cclosure_marshal_VOID__INT,
 401                                     G_TYPE_NONE, 1,
 402                                     G_TYPE_INT);
 403
 404   /**
 405    * GtkInfoBar::close:
 406    *
 407    * The ::close signal is a
 408    * <link linkend="keybinding-signals">keybinding signal</link>
 409    * which gets emitted when the user uses a keybinding to dismiss
 410    * the info bar.
 411    *
 412    * The default binding for this signal is the Escape key.
 413    *
 414    * Since: 2.18
 415    */
 416   signals[CLOSE] =  g_signal_new (I_("close"),
 417                                   G_OBJECT_CLASS_TYPE (klass),
 418                                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 419                                   G_STRUCT_OFFSET (GtkInfoBarClass, close),
 420                                   NULL, NULL,
 421                                   g_cclosure_marshal_VOID__VOID,
 422                                   G_TYPE_NONE, 0);
 423
 424   /**
 425    * GtkInfoBar:content-area-border:
 426    *
 427    * The width of the border around the content
 428    * content area of the info bar.
 429    *
 430    * Since: 2.18
 431    */
 432   gtk_widget_class_install_style_property (widget_class,
 433                                            g_param_spec_int ("content-area-border",
 434                                                              P_("Content area border"),
 435                                                              P_("Width of border around the content area"),
 436                                                              0,
 437                                                              G_MAXINT,
 438                                                              8,
 439                                                              GTK_PARAM_READABLE));
 440
 441   /**
 442    * GtkInfoBar:content-area-spacing:
 443    *
 444    * The default spacing used between elements of the
 445    * content area of the info bar.
 446    *
 447    * Since: 2.18
 448    */
 449   gtk_widget_class_install_style_property (widget_class,
 450                                            g_param_spec_int ("content-area-spacing",
 451                                                              P_("Content area spacing"),
 452                                                              P_("Spacing between elements of the area"),
 453                                                              0,
 454                                                              G_MAXINT,
 455                                                              16,
 456                                                              GTK_PARAM_READABLE));
 457
 458   /**
 459    * GtkInfoBar:button-spacing:
 460    *
 461    * Spacing between buttons in the action area of the info bar.
 462    *
 463    * Since: 2.18
 464    */
 465   gtk_widget_class_install_style_property (widget_class,
 466                                            g_param_spec_int ("button-spacing",
 467                                                              P_("Button spacing"),
 468                                                              P_("Spacing between buttons"),
 469                                                              0,
 470                                                              G_MAXINT,
 471                                                              6,
 472                                                              GTK_PARAM_READABLE));
 473
 474   /**
 475    * GtkInfoBar:action-area-border:
 476    *
 477    * Width of the border around the action area of the info bar.
 478    *
 479    * Since: 2.18
 480    */
 481   gtk_widget_class_install_style_property (widget_class,
 482                                            g_param_spec_int ("action-area-border",
 483                                                              P_("Action area border"),
 484                                                              P_("Width of border around the action area"),
 485                                                              0,
 486                                                              G_MAXINT,
 487                                                              5,
 488                                                              GTK_PARAM_READABLE));
 489
 490   binding_set = gtk_binding_set_by_class (klass);
 491
 492   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0, "close", 0);
 493
 494   g_type_class_add_private (object_class, sizeof (GtkInfoBarPrivate));
 495 }
 496
 497 static void
 498 gtk_info_bar_style_updated (GtkWidget *widget)
 499 {
 500   GtkInfoBar *info_bar = GTK_INFO_BAR (widget);
 501   gint button_spacing;
 502   gint action_area_border;
 503   gint content_area_spacing;
 504   gint content_area_border;
 505
 506   gtk_widget_style_get (widget,
 507                         "button-spacing", &button_spacing,
 508                         "action-area-border", &action_area_border,
 509                         "content-area-spacing", &content_area_spacing,
 510                         "content-area-border", &content_area_border,
 511                         NULL);
 512
 513   gtk_box_set_spacing (GTK_BOX (info_bar->priv->action_area), button_spacing);
 514   gtk_container_set_border_width (GTK_CONTAINER (info_bar->priv->action_area),
 515                                   action_area_border);
 516   gtk_box_set_spacing (GTK_BOX (info_bar->priv->content_area), content_area_spacing);
 517   gtk_container_set_border_width (GTK_CONTAINER (info_bar->priv->content_area),
 518                                   content_area_border);
 519 }
 520
 521 static void
 522 gtk_info_bar_init (GtkInfoBar *info_bar)
 523 {
 524   GtkWidget *content_area;
 525   GtkWidget *action_area;
 526
 527   gtk_widget_push_composite_child ();
 528
 529   info_bar->priv = G_TYPE_INSTANCE_GET_PRIVATE (info_bar,
 530                                                 GTK_TYPE_INFO_BAR,
 531                                                 GtkInfoBarPrivate);
 532
 533   content_area = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
 534   gtk_widget_show (content_area);
 535   gtk_box_pack_start (GTK_BOX (info_bar), content_area, TRUE, TRUE, 0);
 536
 537   action_area = gtk_button_box_new (GTK_ORIENTATION_VERTICAL);
 538   gtk_widget_show (action_area);
 539   gtk_button_box_set_layout (GTK_BUTTON_BOX (action_area), GTK_BUTTONBOX_END);
 540   gtk_box_pack_start (GTK_BOX (info_bar), action_area, FALSE, TRUE, 0);
 541
 542   gtk_widget_set_app_paintable (GTK_WIDGET (info_bar), TRUE);
 543   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (info_bar), TRUE);
 544
 545   info_bar->priv->content_area = content_area;
 546   info_bar->priv->action_area = action_area;
 547
 548   gtk_widget_pop_composite_child ();
 549 }
 550
 551 static GtkBuildableIface *parent_buildable_iface;
 552
 553 static void
 554 gtk_info_bar_buildable_interface_init (GtkBuildableIface *iface)
 555 {
 556   parent_buildable_iface = g_type_interface_peek_parent (iface);
 557   iface->get_internal_child = gtk_info_bar_buildable_get_internal_child;
 558   iface->custom_tag_start = gtk_info_bar_buildable_custom_tag_start;
 559   iface->custom_finished = gtk_info_bar_buildable_custom_finished;
 560 }
 561
 562 static GObject *
 563 gtk_info_bar_buildable_get_internal_child (GtkBuildable *buildable,
 564                                            GtkBuilder   *builder,
 565                                            const gchar  *childname)
 566 {
 567   if (strcmp (childname, "content_area") == 0)
 568     return G_OBJECT (GTK_INFO_BAR (buildable)->priv->content_area);
 569   else if (strcmp (childname, "action_area") == 0)
 570     return G_OBJECT (GTK_INFO_BAR (buildable)->priv->action_area);
 571
 572   return parent_buildable_iface->get_internal_child (buildable,
 573                                                      builder,
 574                                                      childname);
 575 }
 576
 577 static gint
 578 get_response_for_widget (GtkInfoBar *info_bar,
 579                          GtkWidget  *widget)
 580 {
 581   ResponseData *rd;
 582
 583   rd = get_response_data (widget, FALSE);
 584   if (!rd)
 585     return GTK_RESPONSE_NONE;
 586   else
 587     return rd->response_id;
 588 }
 589
 590 static void
 591 action_widget_activated (GtkWidget  *widget,
 592                          GtkInfoBar *info_bar)
 593 {
 594   gint response_id;
 595
 596   response_id = get_response_for_widget (info_bar, widget);
 597   gtk_info_bar_response (info_bar, response_id);
 598 }
 599
 600 /**
 601  * gtk_info_bar_add_action_widget:
 602  * @info_bar: a #GtkInfoBar
 603  * @child: an activatable widget
 604  * @response_id: response ID for @child
 605  *
 606  * Add an activatable widget to the action area of a #GtkInfoBar,
 607  * connecting a signal handler that will emit the #GtkInfoBar::response
 608  * signal on the message area when the widget is activated. The widget
 609  * is appended to the end of the message areas action area.
 610  *
 611  * Since: 2.18
 612  */
 613 void
 614 gtk_info_bar_add_action_widget (GtkInfoBar *info_bar,
 615                                 GtkWidget  *child,
 616                                 gint        response_id)
 617 {
 618   ResponseData *ad;
 619   guint signal_id;
 620
 621   g_return_if_fail (GTK_IS_INFO_BAR (info_bar));
 622   g_return_if_fail (GTK_IS_WIDGET (child));
 623
 624   ad = get_response_data (child, TRUE);
 625
 626   ad->response_id = response_id;
 627
 628   if (GTK_IS_BUTTON (child))
 629     signal_id = g_signal_lookup ("clicked", GTK_TYPE_BUTTON);
 630   else
 631     signal_id = GTK_WIDGET_GET_CLASS (child)->activate_signal;
 632
 633   if (signal_id)
 634     {
 635       GClosure *closure;
 636
 637       closure = g_cclosure_new_object (G_CALLBACK (action_widget_activated),
 638                                        G_OBJECT (info_bar));
 639       g_signal_connect_closure_by_id (child, signal_id, 0, closure, FALSE);
 640     }
 641   else
 642     g_warning ("Only 'activatable' widgets can be packed into the action area of a GtkInfoBar");
 643
 644   gtk_box_pack_end (GTK_BOX (info_bar->priv->action_area),
 645                     child, FALSE, FALSE, 0);
 646   if (response_id == GTK_RESPONSE_HELP)
 647     gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (info_bar->priv->action_area),
 648                                         child, TRUE);
 649 }
 650
 651 /**
 652  * gtk_info_bar_get_action_area:
 653  * @info_bar: a #GtkInfoBar
 654  *
 655  * Returns the action area of @info_bar.
 656  *
 657  * Returns: (transfer none): the action area
 658  *
 659  * Since: 2.18
 660  */
 661 GtkWidget*
 662 gtk_info_bar_get_action_area (GtkInfoBar *info_bar)
 663 {
 664   g_return_val_if_fail (GTK_IS_INFO_BAR (info_bar), NULL);
 665
 666   return info_bar->priv->action_area;
 667 }
 668
 669 /**
 670  * gtk_info_bar_get_content_area:
 671  * @info_bar: a #GtkInfoBar
 672  *
 673  * Returns the content area of @info_bar.
 674  *
 675  * Returns: (transfer none): the content area
 676  *
 677  * Since: 2.18
 678  */
 679 GtkWidget*
 680 gtk_info_bar_get_content_area (GtkInfoBar *info_bar)
 681 {
 682   g_return_val_if_fail (GTK_IS_INFO_BAR (info_bar), NULL);
 683
 684   return info_bar->priv->content_area;
 685 }
 686
 687 /**
 688  * gtk_info_bar_add_button:
 689  * @info_bar: a #GtkInfoBar
 690  * @button_text: text of button, or stock ID
 691  * @response_id: response ID for the button
 692  *
 693  * Adds a button with the given text (or a stock button, if button_text
 694  * is a stock ID) and sets things up so that clicking the button will emit
 695  * the "response" signal with the given response_id. The button is appended
 696  * to the end of the info bars's action area. The button widget is
 697  * returned, but usually you don't need it.
 698  *
 699  * Returns: (transfer none): the button widget that was added
 700  *
 701  * Since: 2.18
 702  */
 703 GtkWidget*
 704 gtk_info_bar_add_button (GtkInfoBar  *info_bar,
 705                          const gchar *button_text,
 706                          gint         response_id)
 707 {
 708   GtkWidget *button;
 709
 710   g_return_val_if_fail (GTK_IS_INFO_BAR (info_bar), NULL);
 711   g_return_val_if_fail (button_text != NULL, NULL);
 712
 713   button = gtk_button_new_from_stock (button_text);
 714
 715   gtk_widget_set_can_default (button, TRUE);
 716
 717   gtk_widget_show (button);
 718
 719   gtk_info_bar_add_action_widget (info_bar, button, response_id);
 720
 721   return button;
 722 }
 723
 724 static void
 725 add_buttons_valist (GtkInfoBar  *info_bar,
 726                     const gchar *first_button_text,
 727                     va_list      args)
 728 {
 729   const gchar* text;
 730   gint response_id;
 731
 732   g_return_if_fail (GTK_IS_INFO_BAR (info_bar));
 733
 734   if (first_button_text == NULL)
 735     return;
 736
 737   text = first_button_text;
 738   response_id = va_arg (args, gint);
 739
 740   while (text != NULL)
 741     {
 742       gtk_info_bar_add_button (info_bar, text, response_id);
 743
 744       text = va_arg (args, gchar*);
 745       if (text == NULL)
 746         break;
 747
 748       response_id = va_arg (args, int);
 749     }
 750 }
 751
 752 /**
 753  * gtk_info_bar_add_buttons:
 754  * @info_bar: a #GtkInfoBar
 755  * @first_button_text: button text or stock ID
 756  * @...: response ID for first button, then more text-response_id pairs,
 757  *     ending with %NULL
 758  *
 759  * Adds more buttons, same as calling gtk_info_bar_add_button()
 760  * repeatedly. The variable argument list should be %NULL-terminated
 761  * as with gtk_info_bar_new_with_buttons(). Each button must have both
 762  * text and response ID.
 763  *
 764  * Since: 2.18
 765  */
 766 void
 767 gtk_info_bar_add_buttons (GtkInfoBar  *info_bar,
 768                           const gchar *first_button_text,
 769                           ...)
 770 {
 771   va_list args;
 772
 773   va_start (args, first_button_text);
 774   add_buttons_valist (info_bar, first_button_text, args);
 775   va_end (args);
 776 }
 777
 778 /**
 779  * gtk_info_bar_new:
 780  *
 781  * Creates a new #GtkInfoBar object.
 782  *
 783  * Returns: a new #GtkInfoBar object
 784  *
 785  * Since: 2.18
 786  */
 787 GtkWidget *
 788 gtk_info_bar_new (void)
 789 {
 790    return g_object_new (GTK_TYPE_INFO_BAR, NULL);
 791 }
 792
 793 /**
 794  * gtk_info_bar_new_with_buttons:
 795  * @first_button_text: (allow-none): stock ID or text to go in first button, or %NULL
 796  * @...: response ID for first button, then additional buttons, ending
 797  *    with %NULL
 798  *
 799  * Creates a new #GtkInfoBar with buttons. Button text/response ID
 800  * pairs should be listed, with a %NULL pointer ending the list.
 801  * Button text can be either a stock ID such as %GTK_STOCK_OK, or
 802  * some arbitrary text. A response ID can be any positive number,
 803  * or one of the values in the #GtkResponseType enumeration. If the
 804  * user clicks one of these dialog buttons, GtkInfoBar will emit
 805  * the "response" signal with the corresponding response ID.
 806  *
 807  * Returns: a new #GtkInfoBar
 808  */
 809 GtkWidget*
 810 gtk_info_bar_new_with_buttons (const gchar *first_button_text,
 811                                ...)
 812 {
 813   GtkInfoBar *info_bar;
 814   va_list args;
 815
 816   info_bar = GTK_INFO_BAR (gtk_info_bar_new ());
 817
 818   va_start (args, first_button_text);
 819   add_buttons_valist (info_bar, first_button_text, args);
 820   va_end (args);
 821
 822   return GTK_WIDGET (info_bar);
 823 }
 824
 825 /**
 826  * gtk_info_bar_set_response_sensitive:
 827  * @info_bar: a #GtkInfoBar
 828  * @response_id: a response ID
 829  * @setting: TRUE for sensitive
 830  *
 831  * Calls gtk_widget_set_sensitive (widget, setting) for each
 832  * widget in the info bars's action area with the given response_id.
 833  * A convenient way to sensitize/desensitize dialog buttons.
 834  *
 835  * Since: 2.18
 836  */
 837 void
 838 gtk_info_bar_set_response_sensitive (GtkInfoBar *info_bar,
 839                                      gint        response_id,
 840                                      gboolean    setting)
 841 {
 842   GList *children, *list;
 843
 844   g_return_if_fail (GTK_IS_INFO_BAR (info_bar));
 845
 846   children = gtk_container_get_children (GTK_CONTAINER (info_bar->priv->action_area));
 847
 848   for (list = children; list; list = list->next)
 849     {
 850       GtkWidget *widget = list->data;
 851       ResponseData *rd = get_response_data (widget, FALSE);
 852
 853       if (rd && rd->response_id == response_id)
 854         gtk_widget_set_sensitive (widget, setting);
 855     }
 856
 857   g_list_free (children);
 858 }
 859
 860 /**
 861  * gtk_info_bar_set_default_response:
 862  * @info_bar: a #GtkInfoBar
 863  * @response_id: a response ID
 864  *
 865  * Sets the last widget in the info bar's action area with
 866  * the given response_id as the default widget for the dialog.
 867  * Pressing "Enter" normally activates the default widget.
 868  *
 869  * Note that this function currently requires @info_bar to
 870  * be added to a widget hierarchy.
 871  *
 872  * Since: 2.18
 873  */
 874 void
 875 gtk_info_bar_set_default_response (GtkInfoBar *info_bar,
 876                                    gint        response_id)
 877 {
 878   GList *children, *list;
 879
 880   g_return_if_fail (GTK_IS_INFO_BAR (info_bar));
 881
 882   children = gtk_container_get_children (GTK_CONTAINER (info_bar->priv->action_area));
 883
 884   for (list = children; list; list = list->next)
 885     {
 886       GtkWidget *widget = list->data;
 887       ResponseData *rd = get_response_data (widget, FALSE);
 888
 889       if (rd && rd->response_id == response_id)
 890         gtk_widget_grab_default (widget);
 891     }
 892
 893   g_list_free (children);
 894 }
 895
 896 /**
 897  * gtk_info_bar_response:
 898  * @info_bar: a #GtkInfoBar
 899  * @response_id: a response ID
 900  *
 901  * Emits the 'response' signal with the given @response_id.
 902  *
 903  * Since: 2.18
 904  */
 905 void
 906 gtk_info_bar_response (GtkInfoBar *info_bar,
 907                        gint        response_id)
 908 {
 909   g_return_if_fail (GTK_IS_INFO_BAR (info_bar));
 910
 911   g_signal_emit (info_bar, signals[RESPONSE], 0, response_id);
 912 }
 913
 914 typedef struct
 915 {
 916   gchar *widget_name;
 917   gchar *response_id;
 918 } ActionWidgetInfo;
 919
 920 typedef struct
 921 {
 922   GtkInfoBar *info_bar;
 923   GtkBuilder *builder;
 924   GSList *items;
 925   gchar *response;
 926 } ActionWidgetsSubParserData;
 927
 928 static void
 929 attributes_start_element (GMarkupParseContext  *context,
 930                           const gchar          *element_name,
 931                           const gchar         **names,
 932                           const gchar         **values,
 933                           gpointer              user_data,
 934                           GError              **error)
 935 {
 936   ActionWidgetsSubParserData *parser_data = (ActionWidgetsSubParserData*)user_data;
 937   guint i;
 938
 939   if (strcmp (element_name, "action-widget") == 0)
 940     {
 941       for (i = 0; names[i]; i++)
 942         if (strcmp (names[i], "response") == 0)
 943           parser_data->response = g_strdup (values[i]);
 944     }
 945   else if (strcmp (element_name, "action-widgets") == 0)
 946     return;
 947   else
 948     g_warning ("Unsupported tag for GtkInfoBar: %s\n", element_name);
 949 }
 950
 951 static void
 952 attributes_text_element (GMarkupParseContext  *context,
 953                          const gchar          *text,
 954                          gsize                 text_len,
 955                          gpointer              user_data,
 956                          GError              **error)
 957 {
 958   ActionWidgetsSubParserData *parser_data = (ActionWidgetsSubParserData*)user_data;
 959   ActionWidgetInfo *item;
 960
 961   if (!parser_data->response)
 962     return;
 963
 964   item = g_new (ActionWidgetInfo, 1);
 965   item->widget_name = g_strndup (text, text_len);
 966   item->response_id = parser_data->response;
 967   parser_data->items = g_slist_prepend (parser_data->items, item);
 968   parser_data->response = NULL;
 969 }
 970
 971 static const GMarkupParser attributes_parser =
 972 {
 973   attributes_start_element,
 974   NULL,
 975   attributes_text_element,
 976 };
 977
 978 gboolean
 979 gtk_info_bar_buildable_custom_tag_start (GtkBuildable  *buildable,
 980                                          GtkBuilder    *builder,
 981                                          GObject       *child,
 982                                          const gchar   *tagname,
 983                                          GMarkupParser *parser,
 984                                          gpointer      *data)
 985 {
 986   ActionWidgetsSubParserData *parser_data;
 987
 988   if (child)
 989     return FALSE;
 990
 991   if (strcmp (tagname, "action-widgets") == 0)
 992     {
 993       parser_data = g_slice_new0 (ActionWidgetsSubParserData);
 994       parser_data->info_bar = GTK_INFO_BAR (buildable);
 995       parser_data->items = NULL;
 996
 997       *parser = attributes_parser;
 998       *data = parser_data;
 999       return TRUE;
1000     }
1001
1002   return parent_buildable_iface->custom_tag_start (buildable, builder, child,
1003                                                    tagname, parser, data);
1004 }
1005
1006 static void
1007 gtk_info_bar_buildable_custom_finished (GtkBuildable *buildable,
1008                                         GtkBuilder   *builder,
1009                                         GObject      *child,
1010                                         const gchar  *tagname,
1011                                         gpointer      user_data)
1012 {
1013   GSList *l;
1014   ActionWidgetsSubParserData *parser_data;
1015   GObject *object;
1016   GtkInfoBar *info_bar;
1017   ResponseData *ad;
1018   guint signal_id;
1019
1020   if (strcmp (tagname, "action-widgets"))
1021     {
1022       parent_buildable_iface->custom_finished (buildable, builder, child,
1023                                                tagname, user_data);
1024       return;
1025     }
1026
1027   info_bar = GTK_INFO_BAR (buildable);
1028   parser_data = (ActionWidgetsSubParserData*)user_data;
1029   parser_data->items = g_slist_reverse (parser_data->items);
1030
1031   for (l = parser_data->items; l; l = l->next)
1032     {
1033       ActionWidgetInfo *item = l->data;
1034
1035       object = gtk_builder_get_object (builder, item->widget_name);
1036       if (!object)
1037         {
1038           g_warning ("Unknown object %s specified in action-widgets of %s",
1039                      item->widget_name,
1040                      gtk_buildable_get_name (GTK_BUILDABLE (buildable)));
1041           continue;
1042         }
1043
1044       ad = get_response_data (GTK_WIDGET (object), TRUE);
1045       ad->response_id = atoi (item->response_id);
1046
1047       if (GTK_IS_BUTTON (object))
1048         signal_id = g_signal_lookup ("clicked", GTK_TYPE_BUTTON);
1049       else
1050         signal_id = GTK_WIDGET_GET_CLASS (object)->activate_signal;
1051
1052       if (signal_id)
1053         {
1054           GClosure *closure;
1055
1056           closure = g_cclosure_new_object (G_CALLBACK (action_widget_activated),
1057                                            G_OBJECT (info_bar));
1058           g_signal_connect_closure_by_id (object,
1059                                           signal_id,
1060                                           0,
1061                                           closure,
1062                                           FALSE);
1063         }
1064
1065       if (ad->response_id == GTK_RESPONSE_HELP)
1066         gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (info_bar->priv->action_area),
1067                                             GTK_WIDGET (object), TRUE);
1068
1069       g_free (item->widget_name);
1070       g_free (item->response_id);
1071       g_free (item);
1072     }
1073   g_slist_free (parser_data->items);
1074   g_slice_free (ActionWidgetsSubParserData, parser_data);
1075 }
1076
1077 /**
1078  * gtk_info_bar_set_message_type:
1079  * @info_bar: a #GtkInfoBar
1080  * @message_type: a #GtkMessageType
1081  *
1082  * Sets the message type of the message area.
1083  * GTK+ uses this type to determine what color to use
1084  * when drawing the message area.
1085  *
1086  * Since: 2.18
1087  */
1088 void
1089 gtk_info_bar_set_message_type (GtkInfoBar     *info_bar,
1090                                GtkMessageType  message_type)
1091 {
1092   GtkInfoBarPrivate *priv;
1093   AtkObject *atk_obj;
1094
1095   g_return_if_fail (GTK_IS_INFO_BAR (info_bar));
1096
1097   priv = info_bar->priv;
1098
1099   if (priv->message_type != message_type)
1100     {
1101       priv->message_type = message_type;
1102
1103       gtk_widget_queue_draw (GTK_WIDGET (info_bar));
1104
1105       atk_obj = gtk_widget_get_accessible (GTK_WIDGET (info_bar));
1106       if (GTK_IS_ACCESSIBLE (atk_obj))
1107         {
1108           GtkStockItem item;
1109           const char *stock_id = NULL;
1110
1111           atk_object_set_role (atk_obj, ATK_ROLE_ALERT);
1112
1113           switch (message_type)
1114             {
1115             case GTK_MESSAGE_INFO:
1116               stock_id = GTK_STOCK_DIALOG_INFO;
1117               break;
1118
1119             case GTK_MESSAGE_QUESTION:
1120               stock_id = GTK_STOCK_DIALOG_QUESTION;
1121               break;
1122
1123             case GTK_MESSAGE_WARNING:
1124               stock_id = GTK_STOCK_DIALOG_WARNING;
1125               break;
1126
1127             case GTK_MESSAGE_ERROR:
1128               stock_id = GTK_STOCK_DIALOG_ERROR;
1129               break;
1130
1131             case GTK_MESSAGE_OTHER:
1132               break;
1133
1134             default:
1135               g_warning ("Unknown GtkMessageType %u", message_type);
1136               break;
1137             }
1138
1139           if (stock_id)
1140             {
1141               gtk_stock_lookup (stock_id, &item);
1142               atk_object_set_name (atk_obj, item.label);
1143             }
1144         }
1145
1146       g_object_notify (G_OBJECT (info_bar), "message-type");
1147     }
1148 }
1149
1150 /**
1151  * gtk_info_bar_get_message_type:
1152  * @info_bar: a #GtkInfoBar
1153  *
1154  * Returns the message type of the message area.
1155  *
1156  * Returns: the message type of the message area.
1157  *
1158  * Since: 2.18
1159  */
1160 GtkMessageType
1161 gtk_info_bar_get_message_type (GtkInfoBar *info_bar)
1162 {
1163   g_return_val_if_fail (GTK_IS_INFO_BAR (info_bar), GTK_MESSAGE_OTHER);
1164
1165   return info_bar->priv->message_type;
1166 }