git.maemo.org Git - modest/blob - src/widgets/modest-wizard-dialog.c

   1 /* Copyright (c) 2006, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 /**
  31  * SECTION:modest-wizard-dialog
  32  * @short_description: A widget to create a guided installation
  33  * process wizard
  34  *
  35  * #ModestWizardDialog is a widget to create a guided installation
  36  * process. The dialog has four standard buttons, previous, next,
  37  * finish, cancel, and contains several pages with optional icons.
  38  * Response buttons are dimmed/undimmed automatically and the standard
  39  * icon is shown/hidden in response to page navigation. The notebook
  40  * widget provided by users contains the actual wizard pages.
  41  */
  42
  43 #include <config.h>
  44 #include <gtk/gtkdialog.h>
  45 #include <gtk/gtknotebook.h>
  46 #include <gtk/gtkimage.h>
  47 #include <gtk/gtkbox.h>
  48 #include <gtk/gtkhbox.h>
  49 #include <gtk/gtkvbox.h>
  50 #include <gtk/gtkbutton.h>
  51 #include <gtk/gtk.h>
  52
  53 #ifdef HAVE_CONFIG_H
  54 #include <config.h>
  55 #endif
  56
  57 #ifndef MODEST_TOOLKIT_GTK
  58 #if MODEST_HILDON_API == 0
  59 #include <hildon-widgets/hildon-defines.h>
  60 #else
  61 #include <hildon/hildon-defines.h>
  62 #endif /*MODEST_HILDON_API == 0*/
  63 #endif /*!MODEST_TOOLKIT_GTK*/
  64
  65 #include "modest-wizard-dialog.h"
  66 #include "modest-debug.h"
  67 #include "modest-text-utils.h"
  68
  69 static GtkDialogClass *parent_class;
  70
  71 static void class_init              (ModestWizardDialogClass   *wizard_dialog_class);
  72
  73 static void init                    (ModestWizardDialog        *wizard_dialog);
  74
  75 static void create_title            (ModestWizardDialog        *wizard_dialog);
  76
  77 static void set_property            (GObject                   *object,
  78                                      guint                     property_id,
  79                                      const GValue              *value,
  80                                      GParamSpec                *pspec);
  81
  82 static void get_property            (GObject                   *object,
  83                                      guint                     property_id,
  84                                      GValue                    *value,
  85                                      GParamSpec                *pspec);
  86
  87 static void finalize                (GObject                   *object);
  88
  89 static void response                (ModestWizardDialog        *wizard,
  90                                      gint                      response_id,
  91                                      gpointer                  unused);
  92
  93 static void make_buttons_sensitive  (ModestWizardDialog *wizard_dialog,
  94                                      gboolean           previous,
  95                                      gboolean           finish,
  96                                      gboolean next);
  97
  98 static gboolean invoke_before_next_vfunc (ModestWizardDialog *wizard_dialog);
  99 static void invoke_enable_buttons_vfunc (ModestWizardDialog *wizard_dialog);
 100
 101 enum {
 102     PROP_ZERO,
 103     PROP_WIZARD_NAME,
 104     PROP_WIZARD_NOTEBOOK,
 105     PROP_WIZARD_AUTOTITLE
 106 };
 107
 108 struct _ModestWizardDialogPrivate {
 109     gchar       *wizard_name;
 110     GtkNotebook *notebook;
 111     GtkBox      *box;
 112     GtkWidget   *image;
 113     gboolean    autotitle;
 114
 115     ModestWizardDialogResponseOverrideFunc override_func;
 116 };
 117
 118
 119 GType
 120 modest_wizard_dialog_get_type (void)
 121 {
 122     static GType wizard_dialog_type = 0;
 123
 124     if (!wizard_dialog_type) {
 125
 126         static const GTypeInfo wizard_dialog_info = {
 127             sizeof (ModestWizardDialogClass),
 128             NULL,       /* base_init      */
 129             NULL,       /* base_finalize  */
 130             (GClassInitFunc) class_init,
 131             NULL,       /* class_finalize */
 132             NULL,       /* class_data     */
 133             sizeof (ModestWizardDialog),
 134             0,          /* n_preallocs    */
 135             (GInstanceInitFunc) init,
 136         };
 137
 138         wizard_dialog_type = g_type_register_static (GTK_TYPE_DIALOG,
 139                                                      "ModestWizardDialog",
 140                                                      &wizard_dialog_info,
 141                                                      0);
 142     }
 143
 144     return wizard_dialog_type;
 145 }
 146
 147 static void
 148 class_init (ModestWizardDialogClass *wizard_dialog_class)
 149 {
 150     GObjectClass *object_class = G_OBJECT_CLASS (wizard_dialog_class);
 151
 152     parent_class = g_type_class_peek_parent (wizard_dialog_class);
 153
 154     g_type_class_add_private (wizard_dialog_class,
 155                               sizeof(ModestWizardDialogPrivate));
 156
 157     /* Override virtual methods */
 158     object_class->set_property = set_property;
 159     object_class->get_property = get_property;
 160     object_class->finalize     = finalize;
 161
 162     /**
 163      * ModestWizardDialog:wizard-name:
 164      *
 165      * The name of the wizard.
 166      */
 167     g_object_class_install_property (object_class, PROP_WIZARD_NAME,
 168             g_param_spec_string
 169             ("wizard-name",
 170              "Wizard Name",
 171              "The name of the ModestWizardDialog",
 172              NULL,
 173              G_PARAM_READWRITE));
 174
 175     /**
 176      * ModestWizardDialog:wizard-notebook:
 177      *
 178      * The notebook object, which is used by the ModestWizardDialog.
 179      */
 180     g_object_class_install_property(object_class, PROP_WIZARD_NOTEBOOK,
 181             g_param_spec_object
 182             ("wizard-notebook",
 183              "Wizard Notebook",
 184              "GtkNotebook object to be used in the "
 185              "ModestWizardDialog",
 186              GTK_TYPE_NOTEBOOK, G_PARAM_READWRITE));
 187
 188     /**
 189      * ModestWizardDialog:autotitle
 190      *
 191      * If the wizard should automatically try to change the window title when changing steps.
 192      * Set to FALSE if you'd like to override the default behaviour.
 193      *
 194      * Since: 0.14.5
 195      */
 196     g_object_class_install_property(object_class, PROP_WIZARD_AUTOTITLE,
 197             g_param_spec_boolean
 198             ("autotitle",
 199              "AutoTitle",
 200              "If the wizard should autotitle itself",
 201              TRUE,
 202              G_PARAM_READWRITE));
 203 }
 204
 205 static void
 206 finalize (GObject *object)
 207 {
 208     ModestWizardDialog *dialog = MODEST_WIZARD_DIALOG (object);
 209     g_return_if_fail (dialog != NULL);
 210
 211     if (dialog->priv->wizard_name != NULL)
 212         g_free (MODEST_WIZARD_DIALOG (object)->priv->wizard_name);
 213
 214     if (G_OBJECT_CLASS (parent_class)->finalize)
 215         G_OBJECT_CLASS (parent_class)->finalize(object);
 216 }
 217
 218 /* Disable or enable the Previous, Next and Finish buttons */
 219 static void
 220 make_buttons_sensitive (ModestWizardDialog *wizard_dialog,
 221                         gboolean previous,
 222                         gboolean finish,
 223                         gboolean next)
 224 {
 225     gtk_dialog_set_response_sensitive (GTK_DIALOG (wizard_dialog),
 226                                        MODEST_WIZARD_DIALOG_PREVIOUS,
 227                                        previous);
 228
 229     gtk_dialog_set_response_sensitive (GTK_DIALOG (wizard_dialog),
 230                                        MODEST_WIZARD_DIALOG_FINISH,
 231                                        finish);
 232
 233     gtk_dialog_set_response_sensitive (GTK_DIALOG (wizard_dialog),
 234                                        MODEST_WIZARD_DIALOG_NEXT,
 235                                        next);
 236 }
 237
 238 static void
 239 init (ModestWizardDialog *wizard_dialog)
 240 {
 241     /* Initialize private structure for faster member access */
 242     ModestWizardDialogPrivate *priv =
 243         G_TYPE_INSTANCE_GET_PRIVATE (wizard_dialog,
 244                 MODEST_TYPE_WIZARD_DIALOG,
 245                 ModestWizardDialogPrivate);
 246
 247     GtkDialog *dialog = GTK_DIALOG (wizard_dialog);
 248
 249     /* Init internal widgets */
 250     GtkWidget *vbox = gtk_vbox_new (FALSE, 0);
 251     gtk_dialog_set_has_separator (dialog, FALSE);
 252     wizard_dialog->priv = priv;
 253     priv->override_func = NULL;
 254     priv->box = GTK_BOX (gtk_hbox_new (FALSE, 0));
 255 #ifdef MODEST_TOOLKIT_HILDON2
 256     priv->image = NULL;
 257 #else
 258 #ifdef MODEST_TOOLKIT_GTK
 259     priv->image = gtk_image_new_from_stock (GTK_STOCK_PREFERENCES, GTK_ICON_SIZE_DIALOG);
 260 #else /*MODEST_TOOLKIT_GTK*/
 261 #if MODEST_HILDON_API == 0
 262     priv->image = gtk_image_new_from_icon_name ("qgn_widg_wizard",
 263                                                 HILDON_ICON_SIZE_WIDG_WIZARD);
 264 #else
 265     static int icon_size = 0;
 266     if (!icon_size)
 267             icon_size = gtk_icon_size_register("modest_wizard", 50, 50);
 268     priv->image = gtk_image_new_from_icon_name ("qgn_widg_wizard",
 269                                                 icon_size);
 270 #endif /*MODEST_HILDON_API == 0*/
 271 #endif /*!MODEST_TOOLKIT_GTK*/
 272 #endif /*MODEST_TOOLKIT_HILDON2 */
 273     /* Default values for user provided properties */
 274     priv->notebook = NULL;
 275     priv->wizard_name = NULL;
 276     priv->autotitle = TRUE;
 277
 278     /* Build wizard layout */
 279     gtk_box_pack_start_defaults (GTK_BOX (dialog->vbox), GTK_WIDGET (priv->box));
 280     gtk_box_pack_start_defaults (GTK_BOX (priv->box), GTK_WIDGET (vbox));
 281     if (priv->image)
 282       gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (priv->image), FALSE, FALSE, 0);
 283
 284     /* Add response buttons: finish, previous, next, cancel */
 285 #ifdef MODEST_TOOLKIT_HILDON1
 286     gtk_dialog_add_button (dialog, _HL("ecdg_bd_wizard_finish"), MODEST_WIZARD_DIALOG_FINISH);
 287     gtk_dialog_add_button (dialog, _HL("ecdg_bd_wizard_previous"), MODEST_WIZARD_DIALOG_PREVIOUS);
 288     gtk_dialog_add_button (dialog, _HL("ecdg_bd_wizard_next"), MODEST_WIZARD_DIALOG_NEXT);
 289     gtk_dialog_add_button (dialog, _HL("ecdg_bd_wizard_cancel"), MODEST_WIZARD_DIALOG_CANCEL);
 290 #endif
 291 #ifdef MODEST_TOOLKIT_HILDON2
 292     gtk_dialog_add_button (dialog, _HL("wdgt_bd_finish"), MODEST_WIZARD_DIALOG_FINISH);
 293     gtk_dialog_add_button (dialog, _HL("wdgt_bd_previous"), MODEST_WIZARD_DIALOG_PREVIOUS);
 294     gtk_dialog_add_button (dialog, _HL("wdgt_bd_next"), MODEST_WIZARD_DIALOG_NEXT);
 295 #endif
 296 #ifdef MODEST_TOOLKIT_GTK
 297     gtk_dialog_add_button (dialog, GTK_STOCK_SAVE, MODEST_WIZARD_DIALOG_FINISH);
 298     gtk_dialog_add_button (dialog, GTK_STOCK_GO_BACK, MODEST_WIZARD_DIALOG_PREVIOUS);
 299     gtk_dialog_add_button (dialog, GTK_STOCK_GO_FORWARD, MODEST_WIZARD_DIALOG_NEXT);
 300     gtk_dialog_add_button (dialog, GTK_STOCK_CANCEL, MODEST_WIZARD_DIALOG_CANCEL);
 301 #endif
 302
 303     /* Set initial button states: previous and finish buttons are disabled */
 304     make_buttons_sensitive (wizard_dialog, FALSE, FALSE, TRUE);
 305
 306     /* Show all the internal widgets */
 307     gtk_widget_show_all (GTK_WIDGET (dialog->vbox));
 308
 309     /* connect to dialog's response signal */
 310     g_signal_connect (G_OBJECT (dialog), "response",
 311             G_CALLBACK (response), NULL);
 312
 313 }
 314
 315 #if GTK_CHECK_VERSION(2, 10, 0) /* These signals were added in GTK+ 2.10: */
 316 static void on_notebook_page_added(GtkNotebook *notebook,
 317                                    GtkWidget   *child,
 318                                    guint        page_num,
 319                                    gpointer     user_data)
 320 {
 321         ModestWizardDialog* dialog = NULL;
 322
 323         g_return_if_fail (MODEST_IS_WIZARD_DIALOG(user_data));
 324         dialog = MODEST_WIZARD_DIALOG(user_data);
 325
 326         /* The title should show the total number of pages: */
 327         create_title (dialog);
 328 }
 329
 330 static void on_notebook_page_removed(GtkNotebook *notebook,
 331                                      GtkWidget   *child,
 332                                      guint        page_num,
 333                                      gpointer     user_data)
 334 {
 335         ModestWizardDialog* dialog = NULL;
 336
 337         g_return_if_fail (MODEST_IS_WIZARD_DIALOG(user_data));
 338         dialog = MODEST_WIZARD_DIALOG(user_data);
 339
 340         /* The title should show the total number of pages: */
 341         create_title (dialog);
 342 }
 343 #endif /* GTK_CHECK_VERSION */
 344
 345 static void
 346 on_notebook_switch_page (GtkNotebook *notebook,
 347                          GtkNotebookPage *page,
 348                          guint page_num,
 349                          ModestWizardDialog *self)
 350 {
 351         g_return_if_fail (MODEST_IS_WIZARD_DIALOG(self));
 352
 353         create_title (self);
 354 }
 355
 356 static void
 357 connect_to_notebook_signals(ModestWizardDialog* dialog)
 358 {
 359 #if GTK_CHECK_VERSION(2, 10, 0) /* These signals were added in GTK+ 2.10: */
 360         ModestWizardDialogPrivate *priv = MODEST_WIZARD_DIALOG(dialog)->priv;
 361         g_return_if_fail (priv->notebook);
 362
 363         /* Connect to the notebook signals,
 364          * so we can update the title when necessary: */
 365         g_signal_connect (G_OBJECT (priv->notebook), "page-added",
 366                       G_CALLBACK (on_notebook_page_added), dialog);
 367         g_signal_connect (G_OBJECT (priv->notebook), "page-removed",
 368                       G_CALLBACK (on_notebook_page_removed), dialog);
 369 #endif /* GTK_CHECK_VERSION */
 370         g_signal_connect_after (G_OBJECT (priv->notebook), "switch-page",
 371                                 G_CALLBACK (on_notebook_switch_page), dialog);
 372 }
 373
 374
 375 static void
 376 set_property (GObject      *object,
 377               guint        property_id,
 378               const GValue *value,
 379               GParamSpec   *pspec)
 380 {
 381     ModestWizardDialogPrivate *priv = MODEST_WIZARD_DIALOG(object)->priv;
 382
 383     switch (property_id) {
 384
 385         case PROP_WIZARD_AUTOTITLE:
 386
 387             priv->autotitle = g_value_get_boolean (value);
 388
 389             if (priv->autotitle &&
 390                 priv->wizard_name &&
 391                 priv->notebook)
 392                 create_title (MODEST_WIZARD_DIALOG (object));
 393             else if (priv->wizard_name)
 394                 gtk_window_set_title (GTK_WINDOW (object), priv->wizard_name);
 395
 396             break;
 397
 398         case PROP_WIZARD_NAME:
 399
 400             /* Set new wizard name. This name will appear in titlebar */
 401             if (priv->wizard_name)
 402                 g_free (priv->wizard_name);
 403
 404             gchar *str = (gchar *) g_value_get_string (value);
 405             g_return_if_fail (str != NULL);
 406
 407             priv->wizard_name = g_strdup (str);
 408
 409             /* We need notebook in order to create title, since page information
 410                is used in title generation */
 411
 412             if (priv->notebook && priv->autotitle)
 413                 create_title (MODEST_WIZARD_DIALOG (object));
 414
 415             break;
 416
 417         case PROP_WIZARD_NOTEBOOK: {
 418
 419             GtkNotebook *book = GTK_NOTEBOOK (g_value_get_object (value));
 420             g_return_if_fail (book != NULL);
 421
 422             priv->notebook = book;
 423
 424             /* Set the default properties for the notebook (disable tabs,
 425              * and remove borders) to make it look like a nice wizard widget */
 426             gtk_notebook_set_show_tabs (priv->notebook, FALSE);
 427             gtk_notebook_set_show_border (priv->notebook, FALSE);
 428             gtk_box_pack_start_defaults (GTK_BOX( priv->box), GTK_WIDGET (priv->notebook));
 429
 430             /* Show the notebook so that a gtk_widget_show on the dialog is
 431              * all that is required to display the dialog correctly */
 432             gtk_widget_show ( GTK_WIDGET (priv->notebook));
 433
 434             /* Update dialog title to reflect current page stats etc */
 435             ModestWizardDialog *wizard_dialog = MODEST_WIZARD_DIALOG (object);
 436             if (priv->wizard_name && priv->autotitle)
 437                 create_title (wizard_dialog);
 438
 439             connect_to_notebook_signals (wizard_dialog);
 440
 441             }break;
 442
 443         default:
 444             G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 445             break;
 446     }
 447 }
 448
 449 static void
 450 get_property (GObject      *object,
 451               guint        property_id,
 452               GValue       *value,
 453               GParamSpec   *pspec)
 454 {
 455     ModestWizardDialogPrivate *priv = MODEST_WIZARD_DIALOG (object)->priv;
 456
 457     switch (property_id) {
 458
 459         case PROP_WIZARD_NAME:
 460             g_value_set_string (value, priv->wizard_name);
 461             break;
 462
 463         case PROP_WIZARD_NOTEBOOK:
 464             g_value_set_object (value, priv->notebook);
 465             break;
 466
 467         default:
 468             G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 469             break;
 470     }
 471 }
 472
 473 /*
 474  * Creates the title of the dialog taking into account the current
 475  * page of the notebook.
 476  */
 477 static void
 478 create_title (ModestWizardDialog *wizard_dialog)
 479 {
 480     gchar *str = NULL;
 481     ModestWizardDialogPrivate *priv = NULL;
 482     GtkNotebook *notebook = NULL;
 483
 484     g_return_if_fail (MODEST_IS_WIZARD_DIALOG(wizard_dialog));
 485     g_return_if_fail (wizard_dialog->priv != NULL);
 486
 487     priv = wizard_dialog->priv;
 488     notebook = priv->notebook;
 489
 490     if (!notebook)
 491         return;
 492
 493     /* Get page information, we'll need that when creating title */
 494     gint pages = gtk_notebook_get_n_pages (notebook);
 495     if (pages == 0)
 496       return;
 497
 498     gint current = gtk_notebook_get_current_page (priv->notebook);
 499     if (current < 0)
 500         current = 0;
 501
 502     /* the welcome title on the initial page */
 503     /* This is the standard wizard title, with, e.g., 1/4 at the end,
 504          * but the Modest UI spec does not want this. */
 505         /*
 506     if (current == 0) {
 507         str = g_strdup_printf (_HL("ecdg_ti_wizard_welcome"),
 508                 priv->wizard_name, pages);
 509     } else {
 510     */
 511         const gchar *steps = gtk_notebook_get_tab_label_text (notebook,
 512                 gtk_notebook_get_nth_page (notebook, current));
 513
 514                 /* This is the standard wizard title, with, e.g., 1/4 at the end,
 515                  * but the Modest UI spec does not want this.
 516                  */
 517                 /*
 518         str = g_strdup_printf (_HL("ecdg_ti_wizard_step"),
 519                 priv->wizard_name, current + 1, pages, steps);
 520         */
 521
 522         str = g_strdup_printf ((steps&&*steps)?_HL("%s: %s"):_HL("%s"),
 523                 priv->wizard_name, steps);
 524     /* } */
 525
 526     /* Update the dialog to display the generated title */
 527     gtk_window_set_title (GTK_WINDOW (wizard_dialog), str);
 528     g_free (str);
 529 }
 530
 531 /*
 532  * Response signal handler. This function is needed because GtkDialog's
 533  * handler for this signal closes the dialog and we don't want that, we
 534  * want to change pages and, dim certain response buttons. Overriding the
 535  * virtual function would not work because that would be called after the
 536  * signal handler implemented by GtkDialog.
 537  * FIXME: There is a much saner way to do that [MDK]
 538  */
 539 static void
 540 response (ModestWizardDialog   *wizard_dialog,
 541           gint                 response_id,
 542           gpointer             unused)
 543 {
 544     ModestWizardDialogPrivate *priv = wizard_dialog->priv;
 545     GtkNotebook *notebook = priv->notebook;
 546     gint current = 0;
 547     gboolean is_first, is_last;
 548
 549     if (priv->override_func) {
 550             if (priv->override_func (wizard_dialog, response_id, gtk_notebook_get_current_page (notebook))) {
 551                     /* Don't let the dialog close */
 552                     g_signal_stop_emission_by_name (wizard_dialog, "response");
 553
 554                     /* Force refresh of title */
 555                     if (priv->autotitle)
 556                             create_title (wizard_dialog);
 557                     return;
 558             }
 559     }
 560
 561     switch (response_id) {
 562
 563         case MODEST_WIZARD_DIALOG_PREVIOUS:
 564             gtk_notebook_prev_page (notebook); /* go to previous page */
 565             break;
 566
 567         case MODEST_WIZARD_DIALOG_NEXT:
 568                 if (invoke_before_next_vfunc (wizard_dialog))
 569                         gtk_notebook_next_page (notebook); /* go to next page */
 570
 571             break;
 572
 573         case MODEST_WIZARD_DIALOG_CANCEL:
 574                 return;
 575                 break;
 576         case MODEST_WIZARD_DIALOG_FINISH:
 577                 if (invoke_before_next_vfunc (wizard_dialog))
 578                 return;
 579
 580             break;
 581
 582     }
 583
 584     current = gtk_notebook_get_current_page (notebook);
 585     gint last = gtk_notebook_get_n_pages (notebook) - 1;
 586     is_last = current == last;
 587     is_first = current == 0;
 588
 589     /* If first page, previous and finish are disabled,
 590        if last page, next is disabled */
 591     make_buttons_sensitive (wizard_dialog,
 592                             (is_first) ? FALSE : TRUE,
 593                             TRUE,
 594                             (is_last) ? FALSE : TRUE);
 595
 596     /* Allow derived classes to disable buttons to prevent navigation,
 597      * according to their own validation logic: */
 598     invoke_enable_buttons_vfunc (wizard_dialog);
 599
 600     /* Don't let the dialog close */
 601     g_signal_stop_emission_by_name (wizard_dialog, "response");
 602
 603     /* We show the default image on first and last pages */
 604     last = gtk_notebook_get_n_pages (notebook) - 1;
 605     if (priv->image) {
 606             if (current == last || current == 0)
 607                     gtk_widget_show (GTK_WIDGET(priv->image));
 608             else
 609                     gtk_widget_hide (GTK_WIDGET(priv->image));
 610     }
 611
 612     /* New page number may appear in the title, update it */
 613     if (priv->autotitle)
 614         create_title (wizard_dialog);
 615 }
 616
 617 /**
 618  * modest_wizard_dialog_new:
 619  * @parent: a #GtkWindow
 620  * @wizard_name: the name of dialog
 621  * @notebook: the notebook to be shown on the dialog
 622  *
 623  * Creates a new #ModestWizardDialog.
 624  *
 625  * Returns: a new #ModestWizardDialog
 626  */
 627 GtkWidget*
 628 modest_wizard_dialog_new (GtkWindow   *parent,
 629                           const char  *wizard_name,
 630                           GtkNotebook *notebook)
 631 {
 632     GtkWidget *widget;
 633
 634     g_return_val_if_fail (GTK_IS_NOTEBOOK (notebook), NULL);
 635
 636     widget = GTK_WIDGET (g_object_new
 637             (MODEST_TYPE_WIZARD_DIALOG,
 638              "wizard-name", wizard_name,
 639              "wizard-notebook", notebook, NULL));
 640
 641     if (parent)
 642         gtk_window_set_transient_for (GTK_WINDOW (widget), parent);
 643
 644     return widget;
 645 }
 646
 647 /**
 648  * modest_wizard_dialog_force_title_update:
 649  * @wizard_dialog: The wizard dialog
 650  *
 651  * Force the title to be rebuilt, for instance when you have added or
 652  * removed notebook pages. This function is not necessary when using GTK+ 2.10,
 653  * because that has GtkNotebook signals that will be used to update the title
 654  * automatically.
 655  */
 656 void
 657 modest_wizard_dialog_force_title_update (ModestWizardDialog   *wizard_dialog)
 658 {
 659         create_title (wizard_dialog);
 660 }
 661
 662 static gboolean
 663 invoke_before_next_vfunc (ModestWizardDialog *wizard_dialog)
 664 {
 665         ModestWizardDialogClass *klass = MODEST_WIZARD_DIALOG_GET_CLASS (wizard_dialog);
 666
 667         /* Call the vfunc, which may be overridden by derived classes: */
 668         if (klass->before_next) {
 669                 ModestWizardDialogPrivate *priv = MODEST_WIZARD_DIALOG(wizard_dialog)->priv;
 670
 671                 gint current_page_num = gtk_notebook_get_current_page (priv->notebook);
 672
 673                 /* Get widgets for the two pages: */
 674                 GtkWidget* current_page_widget = gtk_notebook_get_nth_page (priv->notebook, current_page_num);
 675
 676                 GtkWidget* next_page_widget = NULL;
 677                 if ((current_page_num + 1) < gtk_notebook_get_n_pages (priv->notebook))
 678                         next_page_widget = gtk_notebook_get_nth_page (priv->notebook, current_page_num + 1);
 679
 680                 MODEST_DEBUG_BLOCK (
 681                 g_debug ("Switching to page %d (%s)",
 682                          gtk_notebook_page_num (priv->notebook, next_page_widget),
 683                          gtk_notebook_get_tab_label_text (priv->notebook, next_page_widget));
 684
 685                 {
 686                         GtkWidget *p;
 687                         gint i;
 688                         g_debug ("\t***************");
 689                         for (i=0; i<gtk_notebook_get_n_pages(priv->notebook);i++) {
 690                                 p = gtk_notebook_get_nth_page (priv->notebook, i);
 691                                 g_debug ("\t%d - %s", i, gtk_notebook_get_tab_label_text (priv->notebook, p));
 692                         }
 693                         g_debug ("\t***************");
 694                 }
 695                                     );
 696
 697                 /* Ask the vfunc implementation whether navigation should be allowed: */
 698                 return (*(klass->before_next))(wizard_dialog, current_page_widget, next_page_widget);
 699         }
 700
 701         /* Allow navigation by default if there is no vfunc implementation: */
 702         return TRUE;
 703 }
 704
 705 static void
 706 invoke_enable_buttons_vfunc (ModestWizardDialog *wizard_dialog)
 707 {
 708         ModestWizardDialogClass *klass = MODEST_WIZARD_DIALOG_GET_CLASS (wizard_dialog);
 709
 710         /* Call the vfunc, which may be overridden by derived classes: */
 711         if (klass->enable_buttons) {
 712                 ModestWizardDialogPrivate *priv = MODEST_WIZARD_DIALOG(wizard_dialog)->priv;
 713
 714                 gint current_page_num = gtk_notebook_get_current_page (priv->notebook);
 715
 716                 GtkWidget* current_page_widget = gtk_notebook_get_nth_page (priv->notebook, current_page_num);
 717
 718                 (*(klass->enable_buttons))(wizard_dialog, current_page_widget);
 719         }
 720 }
 721
 722 void
 723 modest_wizard_dialog_set_response_override_handler (ModestWizardDialog *wizard_dialog,
 724                                                     ModestWizardDialogResponseOverrideFunc callback)
 725 {
 726     ModestWizardDialogPrivate *priv = wizard_dialog->priv;
 727
 728     priv->override_func = callback;
 729 }