git.maemo.org Git - hildon/blob - hildon/hildon-touch-selector.c

   1 /*
   2  * This file is a part of hildon
   3  *
   4  * Copyright (C) 2005, 2008 Nokia Corporation.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version. or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free
  18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /**
  22  * SECTION:hildon-touch-selector
  23  * @short_description: A selector widget with several columns.
  24  *
  25  * #HildonTouchSelector is a selector widget, that allows users to
  26  * select items from one to many predefined lists. It is very similar
  27  * to #GtkComboBox, but with several individual pannable columns.
  28  *
  29  * Normally, you would use #HildonTouchSelector together with a
  30  * #HildonPickerDialog activated from a button. For the most common
  31  * cases, you should use #HildonPickerButton.
  32  *
  33  * The composition of each column in the selector is represented by a
  34  * #GtkTreeModel. To add a new column to a #HildonTouchSelector, use
  35  * hildon_touch_selector_append_column(). If you want to add a
  36  * text-only column, without special attributes, use
  37  * hildon_touch_selector_append_text_column().
  38  *
  39  * It is highly recommended that you use only one column
  40  * #HildonTouchSelector<!-- -->s.
  41  * If you only need a text only, one column selector, you can create it with
  42  * hildon_touch_selector_new_text() and populate with
  43  * hildon_touch_selector_append_text(), hildon_touch_selector_prepend_text(),
  44  * and hildon_touch_selector_insert_text().
  45  *
  46  * If you need a selector widget that also accepts user inputs, you
  47  * can use #HildonTouchSelectorEntry.
  48  *
  49  * The current selection has a string representation. In the most common cases,
  50  * each column model will contain a text column. You can configure
  51  * which column in particular using the #HildonTouchSelectorColumn property
  52  * #HildonTouchSelectorColumn:text-column
  53  *
  54  * You can get this string representation using
  55  * hildon_touch_selector_get_current_text().
  56  * You can configure how the selection is printed with
  57  * hildon_touch_selector_set_print_func(), that sets the current hildon touch
  58  * selector print function. The widget has a default print function, that
  59  * uses the #HildonTouchSelectorColumn:text-column property on each
  60  * #HildonTouchSelectorColumn to compose the final representation.
  61  *
  62  * If you create the selector using hildon_touch_selector_new_text() you
  63  * don't need to take care of this property, as the model is created internally.
  64  * If you create the selector using hildon_touch_selector_new(), you
  65  * need to specify properly the property for your custom model in order to get a
  66  * non-empty string representation, or define your custom print function.
  67  *
  68  * <example>
  69  * <title>Creating a HildonTouchSelector</title>
  70  * <programlisting>
  71  * void
  72  * selection_changed (HildonTouchSelector * selector,
  73  *                    gpointer *user_data)
  74  * {
  75  *   gchar *current_selection = NULL;
  76  * <!-- -->
  77  *   current_selection = hildon_touch_selector_get_current_text (selector);
  78  *   g_debug ("Current selection : &percnt;s", current_selection);
  79  * }
  80  * <!-- -->
  81  * static GtkWidget *
  82  * create_customized_selector ()
  83  * {
  84  *   GtkWidget *selector = NULL;
  85  *   GSList *icon_list = NULL;
  86  *   GtkListStore *store_icons = NULL;
  87  *   GSList *item = NULL;
  88  *   GtkCellRenderer *renderer = NULL;
  89  *   HildonTouchSelectorColumn *column = NULL;
  90  * <!-- -->
  91  *   selector = hildon_touch_selector_new ();
  92  * <!-- -->
  93  *   icon_list = gtk_stock_list_ids ();
  94  * <!-- -->
  95  *   store_icons = gtk_list_store_new (1, G_TYPE_STRING);
  96  *   for (item = icon_list; item; item = g_slist_next (item)) {
  97  *     GtkTreeIter iter;
  98  *     gchar *label = item->data;
  99  * <!-- -->
 100  *     gtk_list_store_append (store_icons, &amp;iter);
 101  *     gtk_list_store_set (store_icons, &amp;iter, 0, label, -1);
 102  *     g_free (label);
 103  *   }
 104  *   g_slist_free (icon_list);
 105  * <!-- -->
 106  *   renderer = gtk_cell_renderer_pixbuf_new ();
 107  *   gtk_cell_renderer_set_fixed_size (renderer, -1, 100);
 108  * <!-- -->
 109  *   column = hildon_touch_selector_append_column (HILDON_TOUCH_SELECTOR (selector),
 110  *                                                 GTK_TREE_MODEL (store_icons),
 111  *                                                 renderer, "stock-id", 0, NULL);
 112  * <!-- -->
 113  *   g_object_set (G_OBJECT (column), "text-column", 0, NULL);
 114  * <!-- -->
 115  *   hildon_touch_selector_set_column_selection_mode (HILDON_TOUCH_SELECTOR (selector),
 116  *                                                    HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE);
 117  * <!-- -->
 118  *   g_signal_connect (G_OBJECT (selector), "changed",
 119  *                     G_CALLBACK (selection_changed), NULL);
 120  * <!-- -->
 121  *   return selector;
 122  * }
 123  * <!-- -->
 124  * static GtkWidget *
 125  * create_simple_selector ()
 126  * {
 127  *   GtkWidget *selector = NULL;
 128  *   gint i;
 129  * <!-- -->
 130  *   selector = hildon_touch_selector_new_text ();
 131  *   hildon_touch_selector_set_column_selection_mode (HILDON_TOUCH_SELECTOR (selector),
 132  *                                                    HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE);
 133  * <!-- -->
 134  *   g_signal_connect (G_OBJECT (selector), "changed",
 135  *                     G_CALLBACK (selection_changed), NULL);
 136  * <!-- -->
 137  *   for (i = 1; i <= 10 ; i++) {
 138  *     gchar *label = g_strdup_printf ("Item &amp;percnt;d", i);
 139  * <!-- -->
 140  *     hildon_touch_selector_append_text (HILDON_TOUCH_SELECTOR (selector),
 141  *                                        label);
 142  * <!-- -->
 143  *     g_free (label);
 144  *   }
 145  * <!-- -->
 146  *   return selector;
 147  * }
 148  * </programlisting>
 149  * </example>
 150  */
 151
 152 /**
 153  * SECTION:hildon-touch-selector-column
 154  * @short_description: A visible column in a #HildonTouchSelector
 155  *
 156  * #HildonTouchSelectorColumn object represents a visible column in
 157  * #HildonTouchSelector. It allows to manage the cell renderers related to each
 158  * column.
 159  */
 160
 161 #undef HILDON_DISABLE_DEPRECATED
 162
 163 #ifdef HAVE_CONFIG_H
 164 #include <config.h>
 165 #endif
 166
 167 #include <string.h>
 168 #include <stdlib.h>
 169
 170 #include "hildon-gtk.h"
 171
 172 #include "hildon-pannable-area.h"
 173 #include "hildon-touch-selector.h"
 174 #include "hildon-touch-selector-private.h"
 175
 176 #define HILDON_TOUCH_SELECTOR_GET_PRIVATE(obj)                          \
 177   (G_TYPE_INSTANCE_GET_PRIVATE ((obj), HILDON_TYPE_TOUCH_SELECTOR, HildonTouchSelectorPrivate))
 178
 179 G_DEFINE_TYPE (HildonTouchSelector, hildon_touch_selector, GTK_TYPE_VBOX)
 180
 181 /*
 182  * IMPLEMENTATION NOTES:
 183  * Struct to maintain the data of each column. The columns are the elements
 184  * of the widget that belongs properly to the selection behaviour. Although
 185  * internally the columns are arranged in a private #GtkHBox, as the selector
 186  * itself is a #GtkVBox, you can add more widgets, like buttons etc., so
 187  * you finally could have a widget with more elements that the columns, but
 188  * this doesn't belongs to the selection logic
 189  */
 190 struct _HildonTouchSelectorColumnPrivate
 191 {
 192   HildonTouchSelector *parent;    /* the selector that contains this column */
 193   GtkTreeModel *model;
 194   gint text_column;
 195   GtkTreeView *tree_view;
 196   gulong realize_handler;
 197   GtkTreePath *initial_path;
 198
 199   GtkWidget *panarea;           /* the pannable widget */
 200 };
 201
 202 struct _HildonTouchSelectorPrivate
 203 {
 204   GSList *columns;              /* the selection columns */
 205   GtkWidget *hbox;              /* the container for the selector's columns */
 206   gboolean initial_scroll;      /* whether initial fancy scrolling to selection */
 207
 208   gboolean changed_blocked;
 209
 210   HildonTouchSelectorPrintFunc print_func;
 211   gpointer print_user_data;
 212   GDestroyNotify print_destroy_func;
 213 };
 214
 215 enum
 216 {
 217   PROP_HAS_MULTIPLE_SELECTION = 1,
 218   PROP_INITIAL_SCROLL
 219 };
 220
 221 enum
 222 {
 223   CHANGED,
 224   COLUMNS_CHANGED,
 225   LAST_SIGNAL
 226 };
 227
 228 static gint hildon_touch_selector_signals[LAST_SIGNAL] = { 0 };
 229
 230 static void
 231 hildon_touch_selector_dispose                   (GObject * object);
 232
 233 static void
 234 hildon_touch_selector_get_property              (GObject * object,
 235                                                  guint prop_id,
 236                                                  GValue * value,
 237                                                  GParamSpec * pspec);
 238 static void
 239 hildon_touch_selector_set_property              (GObject *object,
 240                                                  guint prop_id,
 241                                                  const GValue *value,
 242                                                  GParamSpec *pspec);
 243 /* gtkwidget */
 244
 245 /* gtkcontainer */
 246 static void hildon_touch_selector_remove        (GtkContainer * container,
 247                                                  GtkWidget * widget);
 248 /* private functions */
 249 static void _row_tapped_cb                      (GtkTreeView * tree_view,
 250                                                  GtkTreePath * path,
 251                                                  gpointer user_data);
 252 static gchar *_default_print_func               (HildonTouchSelector * selector,
 253                                                  gpointer user_data);
 254
 255 static HildonTouchSelectorColumn *_create_new_column (HildonTouchSelector * selector,
 256                                                  GtkTreeModel * model,
 257                                                  gboolean *emit_changed,
 258                                                  GtkCellRenderer * renderer,
 259                                                  va_list args);
 260 static gboolean
 261 on_realize_cb                                  (GtkWidget *widget,
 262                                                 gpointer data);
 263 static void
 264 on_row_changed                                 (GtkTreeModel *model,
 265                                                 GtkTreePath *path,
 266                                                 GtkTreeIter *iter,
 267                                                 gpointer userdata);
 268
 269 static void
 270 hildon_touch_selector_scroll_to (HildonTouchSelectorColumn *column,
 271                                  GtkTreeView *tv,
 272                                  GtkTreePath *path);
 273 static gboolean
 274 _hildon_touch_selector_center_on_selected_items (HildonTouchSelector *selector,
 275                                                  HildonTouchSelectorColumn *column);
 276 static void
 277 _hildon_touch_selector_set_model                (HildonTouchSelector * selector,
 278                                                  gint num_column,
 279                                                  GtkTreeModel * model);
 280 static gboolean
 281 _hildon_touch_selector_has_multiple_selection   (HildonTouchSelector * selector);
 282
 283 static void
 284 hildon_touch_selector_emit_value_changed        (HildonTouchSelector *selector,
 285                                                  gint column);
 286
 287 /* GtkCellLayout implementation (HildonTouchSelectorColumn)*/
 288 static void hildon_touch_selector_column_cell_layout_init         (GtkCellLayoutIface      *iface);
 289
 290 static void hildon_touch_selector_column_cell_layout_pack_start   (GtkCellLayout         *cell_layout,
 291                                                                    GtkCellRenderer       *cell,
 292                                                                    gboolean               expand);
 293 static void hildon_touch_selector_column_cell_layout_pack_end     (GtkCellLayout         *cell_layout,
 294                                                                    GtkCellRenderer       *cell,
 295                                                                    gboolean               expand);
 296 static void hildon_touch_selector_column_cell_layout_clear        (GtkCellLayout         *cell_layout);
 297 static void hildon_touch_selector_column_cell_layout_add_attribute(GtkCellLayout         *cell_layout,
 298                                                                    GtkCellRenderer       *cell,
 299                                                                    const gchar           *attribute,
 300                                                                    gint                   column);
 301 static void hildon_touch_selector_column_cell_layout_set_cell_data_func (GtkCellLayout         *cell_layout,
 302                                                                          GtkCellRenderer       *cell,
 303                                                                          GtkCellLayoutDataFunc  func,
 304                                                                          gpointer               func_data,
 305                                                                          GDestroyNotify         destroy);
 306 static void hildon_touch_selector_column_cell_layout_clear_attributes   (GtkCellLayout         *cell_layout,
 307                                                                          GtkCellRenderer       *cell);
 308 static void hildon_touch_selector_column_cell_layout_reorder       (GtkCellLayout         *cell_layout,
 309                                                                     GtkCellRenderer       *cell,
 310                                                                     gint                   position);
 311 static GList *hildon_touch_selector_column_cell_layout_get_cells   (GtkCellLayout         *cell_layout);
 312
 313
 314 static void
 315 hildon_touch_selector_class_init (HildonTouchSelectorClass * class)
 316 {
 317   GObjectClass *gobject_class;
 318   GtkObjectClass *object_class;
 319   GtkContainerClass *container_class;
 320
 321   gobject_class = G_OBJECT_CLASS (class);
 322   object_class = GTK_OBJECT_CLASS (class);
 323   container_class = GTK_CONTAINER_CLASS (class);
 324
 325   /* GObject */
 326   gobject_class->dispose = hildon_touch_selector_dispose;
 327   gobject_class->get_property = hildon_touch_selector_get_property;
 328   gobject_class->set_property = hildon_touch_selector_set_property;
 329
 330   /* GtkWidget */
 331
 332   /* GtkContainer */
 333   container_class->remove = hildon_touch_selector_remove;
 334
 335   /* HildonTouchSelector */
 336   class->changed = NULL;
 337   class->set_model = _hildon_touch_selector_set_model;
 338
 339   class->has_multiple_selection = _hildon_touch_selector_has_multiple_selection;
 340
 341   /* signals */
 342   /**
 343    * HildonTouchSelector::changed:
 344    * @widget: the object which received the signal
 345    * @column: the number of the column that has changed
 346    *
 347    * The "changed" signal is emitted when the active item on any column is changed.
 348    * This can be due to the user selecting a different item from the list, or
 349    * due to a call to hildon_touch_selector_select_iter() on one of the columns.
 350    *
 351    * Since: 2.2
 352    */
 353   hildon_touch_selector_signals[CHANGED] =
 354     g_signal_new ("changed",
 355                   G_OBJECT_CLASS_TYPE (class),
 356                   G_SIGNAL_RUN_LAST,
 357                   G_STRUCT_OFFSET (HildonTouchSelectorClass, changed),
 358                   NULL, NULL,
 359                   g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
 360
 361   /**
 362    * HildonTouchSelector::columns-changed:
 363    * @selector: the object which received the signal
 364    *
 365    * The "columns-changed" signal is emitted when the number
 366    * of columns in the #HildonTouchSelector change.
 367    *
 368    * Since: 2.2
 369    */
 370   hildon_touch_selector_signals[COLUMNS_CHANGED] =
 371     g_signal_new ("columns-changed",
 372                   G_OBJECT_CLASS_TYPE (class),
 373                   G_SIGNAL_RUN_LAST, 0,
 374                   NULL, NULL,
 375                   g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
 376
 377   /* properties */
 378
 379   g_object_class_install_property (gobject_class, PROP_HAS_MULTIPLE_SELECTION,
 380                                    g_param_spec_boolean ("has-multiple-selection",
 381                                                          "has multiple selection",
 382                                                          "Whether the widget has multiple "
 383                                                          "selection (like multiple columns, "
 384                                                          "multiselection mode, or multiple "
 385                                                          "internal widgets) and therefore "
 386                                                          "it may need a confirmation button, "
 387                                                          "for instance.",
 388                                                          FALSE,
 389                                                          G_PARAM_READABLE));
 390
 391   g_object_class_install_property (G_OBJECT_CLASS (gobject_class),
 392                                    PROP_INITIAL_SCROLL,
 393                                    g_param_spec_boolean ("initial-scroll",
 394                                                          "Initial scroll",
 395                                                          "Whether to scroll to the"
 396                                                          "current selection when"
 397                                                          "the selector is first"
 398                                                          "shown",
 399                                                          TRUE,
 400                                                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 401
 402   /* style properties */
 403   /* We need to ensure fremantle mode for the treeview in order to work
 404      properly. This is not about the appearance, this is about behaviour */
 405   gtk_rc_parse_string ("style \"fremantle-htst\" {\n"
 406                        "  GtkWidget::hildon-mode = 1\n"
 407                        "} widget \"*.fremantle-htst\" style \"fremantle-htst\""
 408                        "widget_class \"*<HildonPannableArea>.GtkTreeView\" style :highest \"fremantle-htst\"");
 409
 410   g_type_class_add_private (object_class, sizeof (HildonTouchSelectorPrivate));
 411 }
 412
 413 static void
 414 hildon_touch_selector_get_property (GObject * object,
 415                                     guint prop_id,
 416                                     GValue * value, GParamSpec * pspec)
 417 {
 418   HildonTouchSelectorPrivate *priv = HILDON_TOUCH_SELECTOR (object)->priv;
 419
 420   switch (prop_id) {
 421   case PROP_HAS_MULTIPLE_SELECTION:
 422     g_value_set_boolean (value,
 423                          hildon_touch_selector_has_multiple_selection (HILDON_TOUCH_SELECTOR (object)));
 424     break;
 425   case PROP_INITIAL_SCROLL:
 426     g_value_set_boolean (value, priv->initial_scroll);
 427     break;
 428   default:
 429     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 430     break;
 431   }
 432 }
 433
 434 static void
 435 hildon_touch_selector_set_property (GObject *object, guint prop_id,
 436                                     const GValue *value, GParamSpec *pspec)
 437 {
 438   HildonTouchSelectorPrivate *priv = HILDON_TOUCH_SELECTOR (object)->priv;
 439
 440   switch (prop_id) {
 441   case PROP_INITIAL_SCROLL:
 442     priv->initial_scroll = g_value_get_boolean (value);
 443     break;
 444   default:
 445     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 446     break;
 447   }
 448 }
 449
 450
 451 static void
 452 hildon_touch_selector_init (HildonTouchSelector * selector)
 453 {
 454   selector->priv = HILDON_TOUCH_SELECTOR_GET_PRIVATE (selector);
 455
 456   GTK_WIDGET_SET_FLAGS (GTK_WIDGET (selector), GTK_NO_WINDOW);
 457   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (selector), FALSE);
 458
 459   selector->priv->columns = NULL;
 460
 461   selector->priv->print_func = NULL;
 462   selector->priv->print_user_data = NULL;
 463   selector->priv->print_destroy_func = NULL;
 464   selector->priv->initial_scroll = TRUE;
 465   selector->priv->hbox = gtk_hbox_new (FALSE, 0);
 466
 467   selector->priv->changed_blocked = FALSE;
 468
 469   gtk_box_pack_end (GTK_BOX (selector), selector->priv->hbox,
 470                     TRUE, TRUE, 0);
 471   gtk_widget_show (selector->priv->hbox);
 472 }
 473
 474 static void
 475 hildon_touch_selector_dispose (GObject * object)
 476 {
 477   GObjectClass *gobject_class;
 478
 479   hildon_touch_selector_set_print_func_full (HILDON_TOUCH_SELECTOR (object),
 480                                              NULL, NULL, NULL);
 481
 482   gobject_class = G_OBJECT_CLASS (hildon_touch_selector_parent_class);
 483
 484   if (gobject_class->dispose)
 485     (* gobject_class->dispose) (object);
 486 }
 487
 488 static void
 489 disconnect_model_handlers (HildonTouchSelectorColumn *col, HildonTouchSelector *selector)
 490 {
 491   g_signal_handlers_disconnect_by_func (col->priv->model,
 492                                         on_row_changed, selector);
 493 }
 494
 495 /*
 496  * IMPLEMENTATION NOTES:
 497  * Some people sent questions regarding a missing dispose/finalize function on
 498  * this widget that could lead to leak memory, so we will clarify this topic.
 499  *
 500  * This is not required as #HildonTouchSelector extends #GtkContainer. When the
 501  * widget is freed, the #GtkContainer freeing memory functions are called. This
 502  * process includes remove each widget individually, so all the widgets are
 503  * properly freed.
 504  *
 505  * In the same way, this widget redefines gtk_container->remove function, in
 506  * order to free the column related information if it is required.
 507  *
 508  * Please take a look to hildon_touch_selector_remove for more information.
 509  */
 510
 511 /*------------------------------ GtkContainer ------------------------------ */
 512
 513 /*
 514  * Required in order to free the column at the columns list
 515  */
 516 static void
 517 hildon_touch_selector_remove (GtkContainer * container, GtkWidget * widget)
 518 {
 519   HildonTouchSelector *selector = NULL;
 520
 521   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (container));
 522   selector = HILDON_TOUCH_SELECTOR (container);
 523
 524   /* Remove the extra data related to the columns, if required. */
 525   if (widget == selector->priv->hbox) {
 526     g_slist_foreach (selector->priv->columns, (GFunc) disconnect_model_handlers, selector);
 527     g_slist_foreach (selector->priv->columns, (GFunc) g_object_unref, NULL);
 528
 529     g_slist_free (selector->priv->columns);
 530
 531     selector->priv->columns = NULL;
 532   } else {
 533     g_debug ("Freeing a widget outside the columns logic");
 534   }
 535
 536   /* Now remove the widget itself from the container */
 537   GTK_CONTAINER_CLASS (hildon_touch_selector_parent_class)->remove (container, widget);
 538 }
 539
 540 /* ------------------------------ PRIVATE METHODS ---------------------------- */
 541 void
 542 hildon_touch_selector_block_changed             (HildonTouchSelector *selector)
 543 {
 544   selector->priv->changed_blocked = TRUE;
 545 }
 546
 547 void
 548 hildon_touch_selector_unblock_changed           (HildonTouchSelector *selector)
 549 {
 550   selector->priv->changed_blocked = FALSE;
 551 }
 552
 553 static void
 554 hildon_touch_selector_emit_value_changed        (HildonTouchSelector *selector,
 555                                                  gint column)
 556 {
 557   if (!selector->priv->changed_blocked) {
 558     g_signal_emit (selector, hildon_touch_selector_signals[CHANGED], 0, column);
 559   }
 560 }
 561
 562 /**
 563  * default_print_func:
 564  * @selector: a #HildonTouchSelector
 565  *
 566  * Default print function
 567  *
 568  * Returns: a new string that represents the selected items
 569  *
 570  * Since: 2.2
 571  **/
 572 static gchar *
 573 _default_print_func (HildonTouchSelector * selector, gpointer user_data)
 574 {
 575   gchar *result = NULL;
 576   gchar *aux = NULL;
 577   gint num_columns = 0;
 578   GtkTreeIter iter;
 579   GtkTreeModel *model = NULL;
 580   gchar *current_string = NULL;
 581   gint i;
 582   HildonTouchSelectorSelectionMode mode;
 583   GList *item = NULL;
 584   GtkTreePath *current_path = NULL;
 585   GList *selected_rows = NULL;
 586   gint initial_value = 0;
 587   gint text_column = -1;
 588   HildonTouchSelectorColumn *column = NULL;
 589
 590   num_columns = hildon_touch_selector_get_num_columns (selector);
 591
 592   mode = hildon_touch_selector_get_column_selection_mode (selector);
 593
 594   if ((mode == HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE)
 595       && (num_columns > 0)) {
 596     /* In this case we get the first column first */
 597     selected_rows = hildon_touch_selector_get_selected_rows (selector, 0);
 598     model = hildon_touch_selector_get_model (selector, 0);
 599     column = hildon_touch_selector_get_column (selector, 0);
 600     g_object_get (G_OBJECT(column), "text-column", &text_column, NULL);
 601
 602     result = g_strdup_printf ("(");
 603     i = 0;
 604     for (item = selected_rows; item; item = g_list_next (item)) {
 605       current_path = item->data;
 606       gtk_tree_model_get_iter (model, &iter, current_path);
 607
 608       if (text_column != -1) {
 609         gtk_tree_model_get (model, &iter, text_column, &current_string, -1);
 610       }
 611
 612       if (i < g_list_length (selected_rows) - 1) {
 613         aux = g_strconcat (result, current_string, ",", NULL);
 614         g_free (result);
 615         result = aux;
 616       } else {
 617         aux = g_strconcat (result, current_string, NULL);
 618         g_free (result);
 619         result = aux;
 620       }
 621
 622       if (current_string) {
 623         g_free (current_string);
 624         current_string = NULL;
 625       }
 626
 627       i++;
 628     }
 629
 630     aux = g_strconcat (result, ")", NULL);
 631     g_free (result);
 632     result = aux;
 633
 634     g_list_foreach (selected_rows, (GFunc) (gtk_tree_path_free), NULL);
 635     g_list_free (selected_rows);
 636     initial_value = 1;
 637   } else {
 638     initial_value = 0;
 639   }
 640
 641   for (i = initial_value; i < num_columns; i++) {
 642     model = hildon_touch_selector_get_model (selector, i);
 643     column = hildon_touch_selector_get_column (selector, i);
 644     g_object_get (G_OBJECT(column), "text-column", &text_column, NULL);
 645
 646     if (hildon_touch_selector_get_selected (selector, i, &iter)) {
 647       if (text_column == -1 ) {
 648         g_warning ("Trying to use the default print function in HildonTouchSelector, but "
 649                    "\"text-column\" property is not set for HildonTouchSelectorColumn %p.", column);
 650         current_string = NULL;
 651       } else {
 652         gtk_tree_model_get (model, &iter, text_column, &current_string, -1);
 653       }
 654
 655       if (i == 0) {
 656         result = current_string;
 657       } else {
 658         aux = g_strconcat (result, ":", current_string, NULL);
 659         g_free (result);
 660         g_free (current_string);
 661         current_string = NULL;
 662         result = aux;
 663       }
 664     }
 665   }
 666
 667   return result;
 668 }
 669
 670 static void
 671 _row_tapped_cb (GtkTreeView * tree_view, GtkTreePath * path, gpointer user_data)
 672 {
 673   HildonTouchSelector *selector = NULL;
 674   HildonTouchSelectorColumn *column = NULL;
 675   gint num_column = -1;
 676
 677   column = HILDON_TOUCH_SELECTOR_COLUMN (user_data);
 678   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (column->priv->parent));
 679
 680   selector = column->priv->parent;
 681
 682   num_column = g_slist_index (selector->priv->columns, column);
 683
 684   hildon_touch_selector_emit_value_changed (selector, num_column);
 685 }
 686
 687
 688 static HildonTouchSelectorColumn *
 689 _create_new_column (HildonTouchSelector * selector,
 690                     GtkTreeModel * model,
 691                     gboolean *emit_changed,
 692                     GtkCellRenderer * renderer, va_list args)
 693 {
 694   HildonTouchSelectorColumn *new_column = NULL;
 695   GtkTreeViewColumn *tree_column = NULL;
 696   GtkTreeView *tv = NULL;
 697   GtkWidget *panarea = NULL;
 698   GtkTreeSelection *selection = NULL;
 699   GtkTreeIter iter;
 700   gchar *attribute;
 701   gint value;
 702
 703   tree_column = gtk_tree_view_column_new ();
 704
 705   if (renderer != NULL) {
 706     gtk_tree_view_column_pack_start (tree_column, renderer, TRUE);
 707
 708     attribute = va_arg (args, gchar *);
 709     while (attribute != NULL) {
 710       value = va_arg (args, gint);
 711       gtk_tree_view_column_add_attribute (tree_column, renderer, attribute,
 712                                           value);
 713       attribute = va_arg (args, gchar *);
 714     }
 715   }
 716
 717 #ifdef MAEMO_GTK
 718   tv = GTK_TREE_VIEW (hildon_gtk_tree_view_new (HILDON_UI_MODE_EDIT));
 719 #else
 720   tv = GTK_TREE_VIEW (gtk_tree_view_new ());
 721 #endif /* MAEMO_GTK */
 722
 723   gtk_tree_view_set_enable_search (tv, FALSE);
 724   GTK_WIDGET_UNSET_FLAGS (GTK_WIDGET (tv), GTK_CAN_FOCUS);
 725
 726   gtk_tree_view_set_model (tv, model);
 727   g_signal_connect (model, "row-changed",
 728                     G_CALLBACK (on_row_changed), selector);
 729   gtk_tree_view_set_rules_hint (tv, TRUE);
 730
 731   gtk_tree_view_append_column (GTK_TREE_VIEW (tv), tree_column);
 732
 733   new_column = g_object_new (HILDON_TYPE_TOUCH_SELECTOR_COLUMN, NULL);
 734   new_column->priv->parent = selector;
 735
 736   panarea = hildon_pannable_area_new ();
 737
 738   g_object_set (G_OBJECT (panarea),
 739                 "initial-hint", FALSE, NULL);
 740
 741   gtk_container_add (GTK_CONTAINER (panarea), GTK_WIDGET (tv));
 742
 743   new_column->priv->model = model;
 744   new_column->priv->tree_view = tv;
 745   new_column->priv->panarea = panarea;
 746   new_column->priv->realize_handler = 0;
 747   new_column->priv->initial_path = NULL;
 748
 749   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tv));
 750   gtk_tree_selection_set_mode (selection, GTK_SELECTION_BROWSE);
 751
 752   /* select the first item */
 753   *emit_changed = FALSE;
 754   if (gtk_tree_model_get_iter_first (model, &iter)) {
 755     gtk_tree_selection_select_iter (selection, &iter);
 756     *emit_changed = TRUE;
 757   }
 758
 759   gtk_widget_grab_focus (GTK_WIDGET (tv));
 760
 761   /* connect to the hildon-row-tapped signal connection */
 762   g_signal_connect (G_OBJECT (tv), "hildon-row-tapped",
 763                     G_CALLBACK (_row_tapped_cb), new_column);
 764
 765   return new_column;
 766 }
 767
 768
 769 /* ------------------------ HildonTouchSelectorColumn implementation ---------------------- */
 770 G_DEFINE_TYPE_WITH_CODE (HildonTouchSelectorColumn, hildon_touch_selector_column, G_TYPE_OBJECT,
 771                          G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
 772                                                 hildon_touch_selector_column_cell_layout_init))
 773
 774 enum
 775 {
 776   PROP_TEXT_COLUMN = 1
 777 };
 778
 779 static void
 780 hildon_touch_selector_column_class_init (HildonTouchSelectorColumnClass *klass);
 781
 782 static void
 783 hildon_touch_selector_column_get_property (GObject *object, guint property_id,
 784                                            GValue *value, GParamSpec *pspec);
 785
 786 static void
 787 hildon_touch_selector_column_set_property  (GObject *object, guint property_id,
 788                                             const GValue *value, GParamSpec *pspec);
 789
 790 static void
 791 hildon_touch_selector_column_set_text_column (HildonTouchSelectorColumn *column,
 792                                               gint text_column);
 793 static gint
 794 hildon_touch_selector_column_get_text_column (HildonTouchSelectorColumn *column);
 795
 796
 797 static void
 798 hildon_touch_selector_column_class_init (HildonTouchSelectorColumnClass *klass)
 799 {
 800   GObjectClass *gobject_class = NULL;
 801
 802   gobject_class = G_OBJECT_CLASS (klass);
 803
 804   g_type_class_add_private (gobject_class, sizeof (HildonTouchSelectorColumnPrivate));
 805
 806   /* GObject */
 807   gobject_class->get_property = hildon_touch_selector_column_get_property;
 808   gobject_class->set_property = hildon_touch_selector_column_set_property;
 809
 810   g_object_class_install_property (G_OBJECT_CLASS(klass),
 811                                    PROP_TEXT_COLUMN,
 812                                    g_param_spec_int ("text-column",
 813                                                      "Text Column",
 814                                                      "A column in the data source model to get the strings from.",
 815                                                      -1,
 816                                                      G_MAXINT,
 817                                                      -1,
 818                                                      G_PARAM_READWRITE));
 819 }
 820
 821 static void
 822 hildon_touch_selector_column_init (HildonTouchSelectorColumn *column)
 823 {
 824   column->priv = G_TYPE_INSTANCE_GET_PRIVATE (column, HILDON_TYPE_TOUCH_SELECTOR_COLUMN,
 825                                               HildonTouchSelectorColumnPrivate);
 826   column->priv->text_column = -1;
 827 }
 828
 829 static void
 830 hildon_touch_selector_column_set_text_column (HildonTouchSelectorColumn *column,
 831                                               gint text_column)
 832 {
 833   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (column));
 834   g_return_if_fail (text_column >= -1);
 835
 836   column->priv->text_column = text_column;
 837
 838   g_object_notify (G_OBJECT (column), "text-column");
 839 }
 840
 841 static gint
 842 hildon_touch_selector_column_get_text_column (HildonTouchSelectorColumn *column)
 843 {
 844   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (column), -1);
 845
 846   return column->priv->text_column;
 847 }
 848
 849 static void
 850 hildon_touch_selector_column_get_property (GObject *object, guint property_id,
 851                                            GValue *value, GParamSpec *pspec)
 852 {
 853   switch (property_id) {
 854   case PROP_TEXT_COLUMN:
 855     g_value_set_int (value,
 856                      hildon_touch_selector_column_get_text_column (HILDON_TOUCH_SELECTOR_COLUMN (object)));
 857     break;
 858   default:
 859     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 860   }
 861 }
 862
 863 static void
 864 hildon_touch_selector_column_set_property (GObject *object, guint property_id,
 865                                            const GValue *value, GParamSpec *pspec)
 866 {
 867   switch (property_id) {
 868   case PROP_TEXT_COLUMN:
 869     hildon_touch_selector_column_set_text_column (HILDON_TOUCH_SELECTOR_COLUMN (object),
 870                                                   g_value_get_int (value));
 871     break;
 872   default:
 873     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 874   }
 875 }
 876
 877 /* ------------------------ GtkCellLayout implementation -------------------- */
 878 static void
 879 hildon_touch_selector_column_cell_layout_init (GtkCellLayoutIface      *iface)
 880 {
 881   iface->pack_start         = hildon_touch_selector_column_cell_layout_pack_start;
 882   iface->pack_end           = hildon_touch_selector_column_cell_layout_pack_end;
 883   iface->clear              = hildon_touch_selector_column_cell_layout_clear;
 884   iface->add_attribute      = hildon_touch_selector_column_cell_layout_add_attribute;
 885   iface->set_cell_data_func = hildon_touch_selector_column_cell_layout_set_cell_data_func;
 886   iface->clear_attributes   = hildon_touch_selector_column_cell_layout_clear_attributes;
 887   iface->reorder            = hildon_touch_selector_column_cell_layout_reorder;
 888   iface->get_cells          = hildon_touch_selector_column_cell_layout_get_cells;
 889 }
 890
 891 static void
 892 hildon_touch_selector_column_cell_layout_pack_start (GtkCellLayout         *cell_layout,
 893                                                GtkCellRenderer       *cell,
 894                                                gboolean               expand)
 895 {
 896   HildonTouchSelectorColumn *sel_column = NULL;
 897   GtkTreeViewColumn *view_column = NULL;
 898
 899   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 900   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
 901
 902   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
 903
 904   gtk_cell_layout_pack_start (GTK_CELL_LAYOUT(view_column), cell, expand);
 905
 906 }
 907
 908 static void
 909 hildon_touch_selector_column_cell_layout_pack_end (GtkCellLayout         *cell_layout,
 910                                              GtkCellRenderer       *cell,
 911                                              gboolean               expand)
 912 {
 913   HildonTouchSelectorColumn *sel_column = NULL;
 914   GtkTreeViewColumn *view_column = NULL;
 915
 916   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 917   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
 918
 919   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
 920
 921   gtk_cell_layout_pack_end (GTK_CELL_LAYOUT(view_column), cell, expand);
 922 }
 923
 924 static void
 925 hildon_touch_selector_column_cell_layout_clear (GtkCellLayout         *cell_layout)
 926 {
 927   HildonTouchSelectorColumn *sel_column = NULL;
 928   GtkTreeViewColumn *view_column = NULL;
 929
 930   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 931   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
 932
 933   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
 934
 935   gtk_cell_layout_clear (GTK_CELL_LAYOUT(view_column));
 936 }
 937
 938 static void
 939 hildon_touch_selector_column_cell_layout_add_attribute (GtkCellLayout         *cell_layout,
 940                                                   GtkCellRenderer       *cell,
 941                                                   const gchar           *attribute,
 942                                                   gint                   column)
 943 {
 944   HildonTouchSelectorColumn *sel_column = NULL;
 945   GtkTreeViewColumn *view_column = NULL;
 946
 947   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 948   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
 949
 950   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
 951
 952   gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT(view_column), cell, attribute, column);
 953 }
 954
 955
 956 static void
 957 hildon_touch_selector_column_cell_layout_set_cell_data_func (GtkCellLayout         *cell_layout,
 958                                                        GtkCellRenderer       *cell,
 959                                                        GtkCellLayoutDataFunc  func,
 960                                                        gpointer               func_data,
 961                                                        GDestroyNotify         destroy)
 962 {
 963   HildonTouchSelectorColumn *sel_column = NULL;
 964   GtkTreeViewColumn *view_column = NULL;
 965
 966   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 967   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
 968
 969   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
 970
 971   gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT(view_column), cell, func,
 972                                       func_data, destroy);
 973 }
 974
 975 static void
 976 hildon_touch_selector_column_cell_layout_clear_attributes (GtkCellLayout         *cell_layout,
 977                                                      GtkCellRenderer       *cell)
 978 {
 979   HildonTouchSelectorColumn *sel_column = NULL;
 980   GtkTreeViewColumn *view_column = NULL;
 981
 982   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 983   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
 984
 985   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
 986
 987   gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (view_column), cell);
 988 }
 989
 990 static void
 991 hildon_touch_selector_column_cell_layout_reorder (GtkCellLayout         *cell_layout,
 992                                             GtkCellRenderer       *cell,
 993                                             gint                   position)
 994 {
 995   HildonTouchSelectorColumn *sel_column = NULL;
 996   GtkTreeViewColumn *view_column = NULL;
 997
 998   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout));
 999   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
1000
1001   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
1002
1003   gtk_cell_layout_reorder (GTK_CELL_LAYOUT(view_column), cell, position);
1004 }
1005
1006 static GList*
1007 hildon_touch_selector_column_cell_layout_get_cells (GtkCellLayout         *cell_layout)
1008 {
1009   HildonTouchSelectorColumn *sel_column = NULL;
1010   GtkTreeViewColumn *view_column = NULL;
1011
1012   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR_COLUMN (cell_layout), NULL);
1013   sel_column = HILDON_TOUCH_SELECTOR_COLUMN (cell_layout);
1014
1015   view_column = gtk_tree_view_get_column (sel_column->priv->tree_view, 0);
1016
1017   return gtk_cell_layout_get_cells (GTK_CELL_LAYOUT(view_column));
1018 }
1019
1020 /* ------------------------------ PUBLIC METHODS ---------------------------- */
1021
1022 /**
1023  * hildon_touch_selector_new:
1024  *
1025  * Creates a new empty #HildonTouchSelector.
1026  *
1027  * Returns: a new #HildonTouchSelector.
1028  *
1029  * Since: 2.2
1030  **/
1031 GtkWidget *
1032 hildon_touch_selector_new (void)
1033 {
1034   return g_object_new (HILDON_TYPE_TOUCH_SELECTOR, NULL);
1035 }
1036
1037 /**
1038  * hildon_touch_selector_new_text:
1039  *
1040  * Creates a #HildonTouchSelector with a single text column that
1041  * can be populated conveniently through hildon_touch_selector_append_text(),
1042  * hildon_touch_selector_prepend_text(), hildon_touch_selector_insert_text().
1043  *
1044  * Returns: A new #HildonTouchSelector
1045  *
1046  * Since: 2.2
1047  **/
1048 GtkWidget *
1049 hildon_touch_selector_new_text (void)
1050 {
1051   GtkWidget *selector;
1052   GtkListStore *store;
1053   HildonTouchSelectorColumn *column = NULL;
1054
1055   selector = hildon_touch_selector_new ();
1056   store = gtk_list_store_new (1, G_TYPE_STRING);
1057
1058   column = hildon_touch_selector_append_text_column (HILDON_TOUCH_SELECTOR (selector),
1059                                                      GTK_TREE_MODEL (store), TRUE);
1060
1061   g_object_set (G_OBJECT (column), "text-column", 0, NULL);
1062
1063   return selector;
1064 }
1065
1066 /**
1067  * hildon_touch_selector_append_text:
1068  * @selector: A #HildonTouchSelector.
1069  * @text: a non %NULL text string.
1070  *
1071  * Appends a new entry in a #HildonTouchSelector created with
1072  * hildon_touch_selector_new_text().
1073  *
1074  * Since: 2.2
1075  **/
1076 void
1077 hildon_touch_selector_append_text (HildonTouchSelector * selector,
1078                                    const gchar * text)
1079 {
1080   GtkTreeIter iter;
1081   GtkTreeModel *model;
1082
1083   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1084   g_return_if_fail (text != NULL);
1085
1086   model = hildon_touch_selector_get_model (HILDON_TOUCH_SELECTOR (selector), 0);
1087
1088   g_return_if_fail (GTK_IS_LIST_STORE (model));
1089
1090   gtk_list_store_append (GTK_LIST_STORE (model), &iter);
1091   gtk_list_store_set (GTK_LIST_STORE (model), &iter, 0, text, -1);
1092 }
1093
1094 /**
1095  * hildon_touch_selector_prepend_text:
1096  * @selector: A #HildonTouchSelector.
1097  * @text: a non %NULL text string.
1098  *
1099  * Prepends a new entry in a #HildonTouchSelector created with
1100  * hildon_touch_selector_new_text().
1101  *
1102  * Since: 2.2
1103  **/
1104 void
1105 hildon_touch_selector_prepend_text (HildonTouchSelector * selector,
1106                                     const gchar * text)
1107 {
1108   GtkTreeIter iter;
1109   GtkTreeModel *model;
1110
1111   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1112   g_return_if_fail (text != NULL);
1113
1114   model = hildon_touch_selector_get_model (HILDON_TOUCH_SELECTOR (selector), 0);
1115
1116   g_return_if_fail (GTK_IS_LIST_STORE (model));
1117
1118   gtk_list_store_prepend (GTK_LIST_STORE (model), &iter);
1119   gtk_list_store_set (GTK_LIST_STORE (model), &iter, 0, text, -1);
1120 }
1121
1122 /**
1123  * hildon_touch_selector_insert_text:
1124  * @selector: a #HildonTouchSelector.
1125  * @position: the position to insert @text.
1126  * @text: A non %NULL text string.
1127  *
1128  * Inserts a new entry in a particular position of a
1129  * #HildonTouchSelector created with hildon_touch_selector_new_text().
1130  *
1131  * Since: 2.2
1132  **/
1133 void
1134 hildon_touch_selector_insert_text (HildonTouchSelector * selector,
1135                                    gint position, const gchar * text)
1136 {
1137   GtkTreeIter iter;
1138   GtkTreeModel *model;
1139
1140   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1141   g_return_if_fail (text != NULL);
1142   g_return_if_fail (position >= 0);
1143
1144   model = hildon_touch_selector_get_model (HILDON_TOUCH_SELECTOR (selector), 0);
1145
1146   g_return_if_fail (GTK_IS_LIST_STORE (model));
1147
1148   gtk_list_store_insert (GTK_LIST_STORE (model), &iter, position);
1149   gtk_list_store_set (GTK_LIST_STORE (model), &iter, 0, text, -1);
1150 }
1151
1152 /**
1153  * hildon_touch_selector_append_column
1154  * @selector: a #HildonTouchSelector
1155  * @model: the #GtkTreeModel with the data of the column
1156  * @cell_renderer: The #GtkCellRenderer where to draw each row contents.
1157  * @Varargs: a %NULL-terminated pair of attributes and column numbers.
1158  *
1159  * This functions adds a new column to the widget, whose data will
1160  * be obtained from the model. Only widgets added this way should used on
1161  * the selection logic, the print function, the #HildonTouchSelector::changed
1162  * signal, etc. Internally, a #GtkTreeView will be added to the widget, using
1163  * @model as the data source.
1164  *
1165  * You can optionally pass a #GtkCellRenderer in @cell_renderer,
1166  * together with a %NULL-terminated list of pairs property/value, in
1167  * the same way you would use gtk_tree_view_column_set_attributes().
1168  * This will pack @cell_renderer at the start of the column, expanded
1169  * by default.  If you prefer not to add it this way, you can simply
1170  * pass %NULL to @cell_renderer and use the #GtkCellLayout interface
1171  * on the returned #HildonTouchSelectorColumn to set your
1172  * renderers. Please note that the returned #HildonTouchSelectorColumn
1173  * is owned by @selector, you shouldn't unref it after setting it
1174  * up.
1175  *
1176  * Initially, the returned #HildonTouchSelectorColumn will have its
1177  * #HildonTouchSelectorColumn:text-column property unset. You should set
1178  * it to a column in @model with type %G_TYPE_STRING.
1179  *
1180  * Returns: the new column added added, %NULL otherwise.
1181  *
1182  * Since: 2.2
1183  **/
1184
1185 HildonTouchSelectorColumn*
1186 hildon_touch_selector_append_column (HildonTouchSelector * selector,
1187                                      GtkTreeModel * model,
1188                                      GtkCellRenderer * cell_renderer, ...)
1189 {
1190   va_list args;
1191   HildonTouchSelectorColumn *new_column = NULL;
1192   gboolean emit_changed = FALSE;
1193   gint colnum;
1194
1195   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
1196   g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
1197
1198   if (model != NULL) {
1199
1200     va_start (args, cell_renderer);
1201     new_column = _create_new_column (selector, model, &emit_changed, cell_renderer, args);
1202     va_end (args);
1203
1204     selector->priv->columns = g_slist_append (selector->priv->columns,
1205                                               new_column);
1206     gtk_box_pack_start (GTK_BOX (selector->priv->hbox),
1207                         new_column->priv->panarea,
1208                         TRUE, TRUE, 6);
1209
1210     gtk_widget_show_all (new_column->priv->panarea);
1211
1212     if (selector->priv->initial_scroll) {
1213       _hildon_touch_selector_center_on_selected_items (selector, new_column);
1214     }
1215
1216   } else {
1217     return NULL;
1218   }
1219
1220   g_signal_emit (selector, hildon_touch_selector_signals[COLUMNS_CHANGED], 0);
1221   if (emit_changed) {
1222     colnum = g_slist_length (selector->priv->columns);
1223     hildon_touch_selector_emit_value_changed (selector, colnum);
1224   }
1225
1226   return new_column;
1227 }
1228
1229 /**
1230  * hildon_touch_selector_append_text_column
1231  * @selector: a #HildonTouchSelector
1232  * @model: a #GtkTreeModel with data for the column
1233  * @center: whether to center the text on the column
1234  *
1235  * Equivalent to hildon_touch_selector_append_column(), but using a
1236  * default text cell renderer. This is the most common use case of the
1237  * widget.
1238  *
1239  * Returns: the new column added, NULL otherwise.
1240  *
1241  * Since: 2.2
1242  **/
1243 HildonTouchSelectorColumn*
1244 hildon_touch_selector_append_text_column (HildonTouchSelector * selector,
1245                                           GtkTreeModel * model, gboolean center)
1246 {
1247   gfloat xalign = center ? 0.5 : 0.0;
1248   GtkCellRenderer *renderer;
1249
1250   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
1251   g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
1252
1253   renderer = gtk_cell_renderer_text_new ();
1254
1255   g_object_set (renderer,
1256                 "width", 1,
1257                 "xalign", xalign,
1258                 NULL);
1259
1260   return hildon_touch_selector_append_column (selector, model, renderer,
1261                                               "text", 0, NULL);
1262 }
1263
1264 /**
1265  * hildon_touch_selector_remove_column:
1266  * @selector: a #HildonTouchSelector
1267  * @column: the position of the column to be removed
1268  *
1269  * Removes a column from @selector.
1270  *
1271  * Returns: %TRUE if the column was removed, %FALSE otherwise
1272  *
1273  * Since: 2.2
1274  **/
1275 gboolean
1276 hildon_touch_selector_remove_column (HildonTouchSelector * selector, gint column)
1277 {
1278   HildonTouchSelectorColumn *current_column = NULL;
1279   HildonTouchSelectorPrivate *priv;
1280
1281   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), FALSE);
1282   g_return_val_if_fail (column <
1283                         hildon_touch_selector_get_num_columns (selector), FALSE);
1284
1285   priv = HILDON_TOUCH_SELECTOR_GET_PRIVATE (selector);
1286   current_column = g_slist_nth_data (priv->columns, column);
1287
1288   gtk_container_remove (GTK_CONTAINER (priv->hbox), current_column->priv->panarea);
1289   priv->columns = g_slist_remove (priv->columns, current_column);
1290   g_object_unref (current_column);
1291
1292   g_signal_emit (selector, hildon_touch_selector_signals[COLUMNS_CHANGED], 0);
1293
1294   return TRUE;
1295 }
1296
1297 /**
1298  * hildon_touch_selector_set_column_attributes:
1299  * @selector: a #HildonTouchSelector
1300  * @num_column: the number of the column whose attributes we're setting
1301  * @cell_renderer: the #GtkCellRendere we're setting the attributes of
1302  * @Varargs: A %NULL-terminated list of attributes.
1303  *
1304  * Sets the attributes for the given column. The attributes must be given
1305  * in attribute/column pairs, just like in gtk_tree_view_column_set_attributes().
1306  * All existing attributes are removed and replaced with the new ones.
1307  *
1308  * Deprecated: #HildonTouchSelectorColumn implements #GtkCellLayout, use this
1309  *             interface instead. See
1310  *             hildon_touch_selector_get_column().
1311  *
1312  * Since: 2.2
1313  **/
1314 void
1315 hildon_touch_selector_set_column_attributes (HildonTouchSelector * selector,
1316                                              gint num_column,
1317                                              GtkCellRenderer * cell_renderer,
1318                                              ...)
1319 {
1320   va_list args;
1321   GtkTreeViewColumn *tree_column = NULL;
1322   HildonTouchSelectorColumn *current_column = NULL;
1323   gchar *attribute = NULL;
1324   gint value = 0;
1325
1326   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1327   g_return_if_fail (num_column <
1328                     hildon_touch_selector_get_num_columns (selector));
1329
1330   current_column = g_slist_nth_data (selector->priv->columns, num_column);
1331
1332   tree_column = gtk_tree_view_get_column (current_column->priv->tree_view, 0);
1333   gtk_tree_view_remove_column (current_column->priv->tree_view, tree_column);
1334
1335   tree_column = gtk_tree_view_column_new ();
1336   gtk_tree_view_column_pack_start (tree_column, cell_renderer, TRUE);
1337
1338   va_start (args, cell_renderer);
1339   attribute = va_arg (args, gchar *);
1340
1341   gtk_tree_view_column_clear_attributes (tree_column, cell_renderer);
1342
1343   while (attribute != NULL) {
1344     value = va_arg (args, gint);
1345     gtk_tree_view_column_add_attribute (tree_column, cell_renderer,
1346                                         attribute, value);
1347     attribute = va_arg (args, gchar *);
1348   }
1349
1350   va_end (args);
1351
1352   gtk_tree_view_append_column (current_column->priv->tree_view, tree_column);
1353 }
1354
1355 /**
1356  * hildon_touch_selector_get_num_columns:
1357  * @selector: a #HildonTouchSelector
1358  *
1359  * Gets the number of columns in the #HildonTouchSelector.
1360  *
1361  * Returns: the number of columns in @selector.
1362  *
1363  * Since: 2.2
1364  **/
1365 gint
1366 hildon_touch_selector_get_num_columns (HildonTouchSelector * selector)
1367 {
1368   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), -1);
1369
1370   return g_slist_length (selector->priv->columns);
1371 }
1372
1373 /**
1374  * hildon_touch_selector_get_column_selection_mode:
1375  * @selector: a #HildonTouchSelector
1376  *
1377  * Gets the selection mode of @selector.
1378  *
1379  * Returns: one of #HildonTouchSelectorSelectionMode
1380  *
1381  * Since: 2.2
1382  **/
1383 HildonTouchSelectorSelectionMode
1384 hildon_touch_selector_get_column_selection_mode (HildonTouchSelector * selector)
1385 {
1386   HildonTouchSelectorSelectionMode result =
1387     HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE;
1388   GtkSelectionMode treeview_mode = GTK_SELECTION_BROWSE;
1389   HildonTouchSelectorColumn *column = NULL;
1390   GtkTreeSelection *selection = NULL;
1391
1392   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), result);
1393   g_return_val_if_fail (hildon_touch_selector_get_num_columns (selector) > 0,
1394                         result);
1395
1396   column = HILDON_TOUCH_SELECTOR_COLUMN (selector->priv->columns->data);
1397
1398   selection = gtk_tree_view_get_selection (column->priv->tree_view);
1399   treeview_mode = gtk_tree_selection_get_mode (selection);
1400
1401
1402   if (treeview_mode == GTK_SELECTION_MULTIPLE) {
1403     result = HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE;
1404   } else {
1405     result = HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE;
1406   }
1407
1408   return result;
1409 }
1410
1411 /**
1412  * hildon_touch_selector_set_column_selection_mode:
1413  * @selector: a #HildonTouchSelector
1414  * @mode: the #HildonTouchSelectorMode for @selector
1415  *
1416  * Sets the selection mode for @selector. See #HildonTouchSelectorSelectionMode.
1417  *
1418  * Since: 2.2
1419  **/
1420 void
1421 hildon_touch_selector_set_column_selection_mode (HildonTouchSelector * selector,
1422                                                  HildonTouchSelectorSelectionMode mode)
1423 {
1424   GtkTreeView *tv = NULL;
1425   HildonTouchSelectorColumn *column = NULL;
1426   GtkTreeSelection *selection = NULL;
1427   GtkSelectionMode treeview_mode = GTK_SELECTION_MULTIPLE;
1428   GtkTreeIter iter;
1429   HildonTouchSelectorSelectionMode current_mode;
1430
1431   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1432   g_return_if_fail (hildon_touch_selector_get_num_columns (selector) > 0);
1433
1434   current_mode = hildon_touch_selector_get_column_selection_mode (selector);
1435
1436   if (current_mode == mode) {
1437     return;
1438   }
1439
1440   column = HILDON_TOUCH_SELECTOR_COLUMN ((g_slist_nth (selector->priv->columns, 0))->data);
1441   tv = column->priv->tree_view;
1442
1443   if (tv) {
1444     switch (mode) {
1445     case HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE:
1446       treeview_mode = GTK_SELECTION_BROWSE;
1447       break;
1448     case HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE:
1449       treeview_mode = GTK_SELECTION_MULTIPLE;
1450       break;
1451     }
1452
1453     selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tv));
1454     gtk_tree_selection_set_mode (selection, treeview_mode);
1455
1456     selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tv));
1457     gtk_tree_model_get_iter_first (column->priv->model, &iter);
1458     gtk_tree_selection_unselect_all (selection);
1459     gtk_tree_selection_select_iter (selection, &iter);
1460
1461     /* the column changed was the first one */
1462     hildon_touch_selector_emit_value_changed (selector, 0);
1463   }
1464
1465 }
1466
1467 /**
1468  * hildon_touch_selector_set_print_func:
1469  * @selector: a #HildonTouchSelector
1470  * @func: a #HildonTouchSelectorPrintFunc function
1471  *
1472  * Sets the function to be used by hildon_touch_selector_get_current_text()
1473  * to produce a text representation of the currently selected items in @selector.
1474  * The default function will return a concatenation of comma separated items
1475  * selected in each column in @selector. Use this to override this method if you
1476  * need a particular representation for your application.
1477  *
1478  * Since: 2.2
1479  **/
1480 void
1481 hildon_touch_selector_set_print_func (HildonTouchSelector * selector,
1482                                       HildonTouchSelectorPrintFunc func)
1483 {
1484   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1485
1486   hildon_touch_selector_set_print_func_full (selector, func, NULL, NULL);
1487 }
1488
1489 /**
1490  * hildon_touch_selector_set_print_func_full:
1491  * @selector: a #HildonTouchSelector
1492  * @func: a #HildonTouchSelectorPrintFunc function
1493  * @user_data: a pointer to user data or %NULL
1494  * @destroy_func: a callback for freeing the user data or %NULL
1495  *
1496  * Sets the function to be used by hildon_touch_selector_get_current_text()
1497  * to produce a text representation of the currently selected items in @selector.
1498  * The default function will return a concatenation of comma separated items
1499  * selected in each column in @selector. Use this to override this method if you
1500  * need a particular representation for your application.
1501  *
1502  * Since: 2.2
1503  **/
1504 void
1505 hildon_touch_selector_set_print_func_full (HildonTouchSelector          *selector,
1506                                            HildonTouchSelectorPrintFunc  func,
1507                                            gpointer                      user_data,
1508                                            GDestroyNotify                destroy_func)
1509 {
1510   gpointer       old_user_data;
1511   GDestroyNotify old_destroy_func;
1512
1513   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1514
1515   old_user_data = selector->priv->print_user_data;
1516   old_destroy_func = selector->priv->print_destroy_func;
1517
1518   selector->priv->print_func = func;
1519   selector->priv->print_user_data = user_data;
1520   selector->priv->print_destroy_func = destroy_func;
1521
1522   if (old_destroy_func && old_user_data != user_data)
1523     (*old_destroy_func) (old_user_data);
1524 }
1525
1526 /**
1527  * hildon_touch_selector_get_print_func:
1528  * @selector: a #HildonTouchSelector
1529  *
1530  * Gets the #HildonTouchSelectorPrintFunc currently used. See
1531  * hildon_touch_selector_set_print_func().
1532  *
1533  * Returns: a #HildonTouchSelectorPrintFunc or %NULL if the default
1534  * one is currently used.
1535  **/
1536 HildonTouchSelectorPrintFunc
1537 hildon_touch_selector_get_print_func (HildonTouchSelector * selector)
1538 {
1539   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
1540
1541   return selector->priv->print_func;
1542 }
1543
1544 /**
1545  * hildon_touch_selector_set_active:
1546  * @selector: a #HildonTouchSelector
1547  * @column: column number
1548  * @index: the index of the item to select, or -1 to have no active item
1549  *
1550  * Sets the active item of the #HildonTouchSelector to @index. The
1551  * column number is taken from @column.
1552  *
1553  * @selector must be in %HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE
1554  *
1555  * Since: 2.2
1556  **/
1557 void
1558 hildon_touch_selector_set_active                (HildonTouchSelector *selector,
1559                                                  gint                 column,
1560                                                  gint                 index)
1561 {
1562   GtkTreeSelection *selection = NULL;
1563   HildonTouchSelectorColumn *current_column = NULL;
1564   HildonTouchSelectorSelectionMode mode;
1565   GtkTreePath *path;
1566
1567   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1568   g_return_if_fail (column < hildon_touch_selector_get_num_columns (selector));
1569   mode = hildon_touch_selector_get_column_selection_mode (selector);
1570   g_return_if_fail (mode == HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE);
1571
1572   current_column = g_slist_nth_data (selector->priv->columns, column);
1573
1574   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (current_column->priv->tree_view));
1575   path = gtk_tree_path_new_from_indices (index, -1);
1576   gtk_tree_selection_unselect_all (selection);
1577   if (index != -1)
1578     gtk_tree_selection_select_path (selection, path);
1579
1580   hildon_touch_selector_emit_value_changed (selector, column);
1581
1582   gtk_tree_path_free (path);
1583 }
1584
1585 /**
1586  * hildon_touch_selector_get_active:
1587  * @selector: a #HildonTouchSelector
1588  * @column: column number
1589  *
1590  * Returns the index of the currently active item in column number
1591  * @column, or -1 if there's no active item.
1592  *
1593  * @selector must be in %HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE
1594  *
1595  * Returns: an integer which is the index of the currently active
1596  * item, or -1 if there's no active item.
1597  *
1598  * Since: 2.2
1599  **/
1600 gint
1601 hildon_touch_selector_get_active                (HildonTouchSelector *selector,
1602                                                  gint                 column)
1603 {
1604   GtkTreeSelection *selection = NULL;
1605   HildonTouchSelectorColumn *current_column = NULL;
1606   HildonTouchSelectorSelectionMode mode;
1607   GtkTreeModel *model;
1608   GtkTreeIter iter;
1609   GtkTreePath *path;
1610   gint index;
1611
1612   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), -1);
1613   g_return_val_if_fail (column < hildon_touch_selector_get_num_columns (selector), -1);
1614   mode = hildon_touch_selector_get_column_selection_mode (selector);
1615   g_return_val_if_fail (mode == HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE, -1);
1616
1617   current_column = g_slist_nth_data (selector->priv->columns, column);
1618
1619   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (current_column->priv->tree_view));
1620   g_return_val_if_fail (gtk_tree_selection_get_selected (selection, NULL, &iter), -1);
1621
1622   model = gtk_tree_view_get_model (GTK_TREE_VIEW (current_column->priv->tree_view));
1623   path = gtk_tree_model_get_path (model, &iter);
1624   index = (gtk_tree_path_get_indices (path))[0];
1625
1626   gtk_tree_path_free (path);
1627
1628   return index;
1629 }
1630
1631 /**
1632  * hildon_touch_selector_get_selected:
1633  * @selector: a #HildonTouchSelector
1634  * @column: the column number we want to get the element
1635  * @iter: #GtkTreeIter currently selected
1636  *
1637  * Sets @iter to the currently selected node on the nth-column, if selection is
1638  * set to %HILDON_TOUCH_SELECTOR_SINGLE or %HILDON_TOUCH_SELECTOR_MULTIPLE with
1639  * a column different that the first one. @iter may be %NULL if you just want to
1640  * test if selection has any selected items.
1641  *
1642  * This function will not work if selection is in
1643  * %HILDON_TOUCH_SELECTOR_MULTIPLE mode and the column is the first one.
1644  *
1645  * See gtk_tree_selection_get_selected() for more information.
1646  *
1647  * Returns: %TRUE if @iter was correctly set, %FALSE otherwise
1648  *
1649  * Since: 2.2
1650  **/
1651 gboolean
1652 hildon_touch_selector_get_selected (HildonTouchSelector * selector,
1653                                     gint column, GtkTreeIter * iter)
1654 {
1655   GtkTreeSelection *selection = NULL;
1656   HildonTouchSelectorColumn *current_column = NULL;
1657   HildonTouchSelectorSelectionMode mode;
1658
1659   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), FALSE);
1660   g_return_val_if_fail (column < hildon_touch_selector_get_num_columns (selector),
1661                         FALSE);
1662   mode = hildon_touch_selector_get_column_selection_mode (selector);
1663   g_return_val_if_fail
1664     ((mode == HILDON_TOUCH_SELECTOR_SELECTION_MODE_SINGLE) ||
1665      ((mode == HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE)&&(column>0)),
1666      FALSE);
1667
1668   current_column = g_slist_nth_data (selector->priv->columns, column);
1669
1670   selection =
1671     gtk_tree_view_get_selection (GTK_TREE_VIEW (current_column->priv->tree_view));
1672
1673   return gtk_tree_selection_get_selected (selection, NULL, iter);
1674 }
1675
1676 /**
1677  * hildon_touch_selector_select_iter
1678  * @selector: a #HildonTouchSelector
1679  * @column:   the column to selects
1680  * @iter:     the #GtkTreeIter to be selected
1681  * @scroll_to: whether to smoothly scroll to the item
1682  *
1683  * Sets the currently selected item in the column @column to the one pointed by @iter,
1684  * optionally smoothly scrolling to it.
1685  *
1686  * Since: 2.2
1687  **/
1688 void
1689 hildon_touch_selector_select_iter (HildonTouchSelector * selector,
1690                                    gint column, GtkTreeIter * iter,
1691                                    gboolean scroll_to)
1692 {
1693   GtkTreePath *path;
1694   GtkTreeModel *model;
1695   HildonTouchSelectorColumn *current_column = NULL;
1696   GtkTreeView *tv = NULL;
1697   GtkTreeSelection *selection = NULL;
1698
1699   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1700   g_return_if_fail (column < hildon_touch_selector_get_num_columns (selector));
1701
1702   current_column = g_slist_nth_data (selector->priv->columns, column);
1703
1704   tv = current_column->priv->tree_view;
1705   selection = gtk_tree_view_get_selection (tv);
1706   model = gtk_tree_view_get_model (tv);
1707   path = gtk_tree_model_get_path (model, iter);
1708
1709   gtk_tree_selection_select_iter (selection, iter);
1710
1711   if (scroll_to) {
1712     hildon_touch_selector_scroll_to (current_column, tv, path);
1713   }
1714
1715   hildon_touch_selector_emit_value_changed (selector, column);
1716
1717   gtk_tree_path_free (path);
1718 }
1719
1720 /**
1721  * hildon_touch_selector_unselect_iter
1722  * @selector: a #HildonTouchSelector
1723  * @column:   the column to unselects from
1724  * @iter:     the #GtkTreeIter to be unselected
1725  *
1726  * Unselect the item pointed by @iter in the column @column
1727  *
1728  * Since: 2.2
1729  **/
1730
1731 void hildon_touch_selector_unselect_iter (HildonTouchSelector * selector,
1732                                           gint column,
1733                                           GtkTreeIter * iter)
1734 {
1735   HildonTouchSelectorColumn *current_column = NULL;
1736   GtkTreeSelection *selection = NULL;
1737
1738   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1739   g_return_if_fail (column < hildon_touch_selector_get_num_columns (selector));
1740
1741   current_column = g_slist_nth_data (selector->priv->columns, column);
1742   selection = gtk_tree_view_get_selection (current_column->priv->tree_view);
1743   gtk_tree_selection_unselect_iter (selection, iter);
1744
1745   hildon_touch_selector_emit_value_changed (selector, column);
1746 }
1747
1748 /**
1749  * hildon_touch_selector_unselect_all:
1750  * @selector: a #HildonTouchSelector
1751  * @column: the position of the column to get the selected rows from
1752  *
1753  * Unselects all the selected items in the column @column.
1754  *
1755  * Since: 2.2
1756  **/
1757 void
1758 hildon_touch_selector_unselect_all (HildonTouchSelector * selector,
1759                                     gint column)
1760 {
1761   HildonTouchSelectorColumn *current_column = NULL;
1762   GtkTreeSelection *selection = NULL;
1763
1764   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
1765   g_return_if_fail (column < hildon_touch_selector_get_num_columns (selector));
1766
1767   current_column = g_slist_nth_data (selector->priv->columns, column);
1768   selection = gtk_tree_view_get_selection (current_column->priv->tree_view);
1769   gtk_tree_selection_unselect_all (selection);
1770
1771   hildon_touch_selector_emit_value_changed (selector, column);
1772 }
1773
1774 /**
1775  * hildon_touch_selector_get_selected_rows:
1776  * @selector: a #HildonTouchSelector
1777  * @column: the position of the column to get the selected rows from
1778  *
1779  * Creates a list of #GtkTreePath<!-- -->s of all selected rows in a column. Additionally,
1780  * if you to plan to modify the model after calling this function, you may
1781  * want to convert the returned list into a list of GtkTreeRowReferences. To do this,
1782  * you can use gtk_tree_row_reference_new().
1783  *
1784  * See gtk_tree_selection_get_selected_rows() for more information.
1785  *
1786  * Returns: A new #GList containing a #GtkTreePath for each selected row in the column @column.
1787  *
1788  * Since: 2.2
1789  **/
1790 GList *
1791 hildon_touch_selector_get_selected_rows (HildonTouchSelector * selector,
1792                                          gint column)
1793 {
1794   GList *result = NULL;
1795   HildonTouchSelectorColumn *current_column = NULL;
1796   GtkTreeSelection *selection = NULL;
1797
1798   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
1799   g_return_val_if_fail (column < hildon_touch_selector_get_num_columns (selector),
1800                         NULL);
1801
1802   current_column = g_slist_nth_data (selector->priv->columns, column);
1803   selection = gtk_tree_view_get_selection (current_column->priv->tree_view);
1804
1805   result = gtk_tree_selection_get_selected_rows (selection, NULL);
1806
1807   return result;
1808 }
1809
1810 /**
1811  * hildon_touch_selector_get_model:
1812  * @selector: a #HildonTouchSelector
1813  * @column: the position of the column in @selector
1814  *
1815  * Gets the model of a column of @selector.
1816  *
1817  * Returns: the #GtkTreeModel for the column @column of @selector.
1818  *
1819  * Since: 2.2
1820  **/
1821 GtkTreeModel *
1822 hildon_touch_selector_get_model (HildonTouchSelector * selector, gint column)
1823 {
1824   HildonTouchSelectorColumn *current_column = NULL;
1825
1826   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
1827   g_return_val_if_fail (column < hildon_touch_selector_get_num_columns (selector),
1828                         NULL);
1829
1830   current_column = g_slist_nth_data (selector->priv->columns, column);
1831
1832   return current_column->priv->model;
1833 }
1834
1835 static void
1836 on_row_changed (GtkTreeModel *model,
1837                 GtkTreePath *path,
1838                 GtkTreeIter *iter,
1839                 gpointer userdata)
1840 {
1841   HildonTouchSelector *selector;
1842   HildonTouchSelectorColumn *current_column;
1843
1844   gint column = 0;
1845   GSList *col;
1846
1847   selector = HILDON_TOUCH_SELECTOR (userdata);
1848
1849   for (col = selector->priv->columns; col != NULL; col = col->next) {
1850     current_column = HILDON_TOUCH_SELECTOR_COLUMN (col->data);
1851     if (current_column->priv->model == model &&
1852         gtk_tree_selection_path_is_selected (gtk_tree_view_get_selection (current_column->priv->tree_view),
1853                                              path)) {
1854       hildon_touch_selector_emit_value_changed (selector, column);
1855     }
1856     column ++;
1857   }
1858 }
1859
1860 static void
1861 _hildon_touch_selector_set_model (HildonTouchSelector * selector,
1862                                   gint column, GtkTreeModel * model)
1863 {
1864   HildonTouchSelectorColumn *current_column = NULL;
1865
1866   current_column =
1867     HILDON_TOUCH_SELECTOR_COLUMN (g_slist_nth_data (selector->priv->columns, column));
1868
1869   if (current_column->priv->model) {
1870     g_signal_handlers_disconnect_by_func (current_column->priv->model,
1871                                           on_row_changed, selector);
1872   }
1873   current_column->priv->model = model;
1874   gtk_tree_view_set_model (current_column->priv->tree_view,
1875                            current_column->priv->model);
1876   g_signal_connect (model, "row-changed",
1877                     G_CALLBACK (on_row_changed), selector);
1878 }
1879
1880 /**
1881  * hildon_touch_selector_set_model:
1882  * @selector: a #HildonTouchSelector
1883  * @column: the position of the column to set the model to
1884  * @model: a #GtkTreeModel
1885  *
1886  * Sets the #GtkTreeModel for a particular column in @model.
1887  *
1888  * Since: 2.2
1889  **/
1890 void
1891 hildon_touch_selector_set_model (HildonTouchSelector * selector,
1892                                  gint column, GtkTreeModel * model)
1893 {
1894   g_return_if_fail (HILDON_TOUCH_SELECTOR (selector));
1895   g_return_if_fail (column < hildon_touch_selector_get_num_columns (selector));
1896
1897   HILDON_TOUCH_SELECTOR_GET_CLASS (selector)->set_model (selector, column, model);
1898 }
1899
1900 /**
1901  * hildon_touch_selector_get_current_text:
1902  * @selector: a #HildonTouchSelector
1903  *
1904  * Returns a string representing the currently selected items for
1905  * each column of @selector. See hildon_touch_selector_set_print_func().
1906  *
1907  * Returns: a newly allocated string.
1908  *
1909  * Since: 2.2
1910  **/
1911 gchar *
1912 hildon_touch_selector_get_current_text (HildonTouchSelector * selector)
1913 {
1914   gchar *result = NULL;
1915   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
1916
1917   if (selector->priv->print_func) {
1918     result = (*selector->priv->print_func) (selector, selector->priv->print_user_data);
1919   } else {
1920     result = _default_print_func (selector, NULL);
1921   }
1922
1923   return result;
1924 }
1925
1926 static void
1927 search_nearest_element (HildonPannableArea *panarea,
1928                         GtkTreeView *tv,
1929                         GList *selected_rows,
1930                         GtkTreePath **nearest_path)
1931 {
1932   GtkAdjustment *adj = NULL;
1933   gdouble target_value = 0;
1934   GdkRectangle rect;
1935   GList *iter = NULL;
1936   GtkTreePath *path = NULL;
1937   gint y = -1;
1938   gdouble nearest_distance = -1;
1939   gdouble current_distance = -1;
1940   GtkTreePath *result_path = NULL;
1941
1942   g_assert (nearest_path != NULL);
1943
1944   if (selected_rows == NULL) {
1945     *nearest_path = NULL;
1946     return;
1947   }
1948
1949   adj = hildon_pannable_area_get_vadjustment (panarea);
1950   g_return_if_fail (adj != NULL);
1951
1952   /* we add this in order to check the nearest to the center of
1953      the visible area */
1954   target_value = gtk_adjustment_get_value (adj) + adj->page_size/2;
1955
1956   path = result_path = selected_rows->data;
1957   gtk_tree_view_get_background_area (tv, path, NULL, &rect);
1958   gtk_tree_view_convert_bin_window_to_tree_coords (tv, 0, rect.y, NULL, &y);
1959   nearest_distance = abs (target_value - y);
1960
1961   for (iter = selected_rows->next; iter; iter = g_list_next (iter)) {
1962     gtk_tree_view_get_background_area (tv, path, NULL, &rect);
1963     gtk_tree_view_convert_bin_window_to_tree_coords (tv, 0, rect.y, NULL, &y);
1964     current_distance = abs (target_value - y);
1965     if (current_distance < nearest_distance) {
1966       nearest_distance = current_distance;
1967       result_path = path;
1968     }
1969   }
1970
1971   *nearest_path = result_path;
1972 }
1973
1974 static gboolean
1975 on_realize_cb                                  (GtkWidget *widget,
1976                                                 gpointer data)
1977 {
1978   HildonTouchSelectorColumn *column = NULL;
1979   GdkRectangle rect;
1980   gint y;
1981
1982   column = HILDON_TOUCH_SELECTOR_COLUMN (data);
1983
1984   if (column->priv->initial_path) {
1985     gtk_tree_view_get_background_area (GTK_TREE_VIEW (column->priv->tree_view),
1986                                        column->priv->initial_path, NULL, &rect);
1987     gtk_tree_view_convert_bin_window_to_tree_coords
1988       (GTK_TREE_VIEW (column->priv->tree_view),
1989        0, rect.y, NULL, &y);
1990
1991     hildon_pannable_area_scroll_to (HILDON_PANNABLE_AREA (column->priv->panarea),
1992                                     -1, y);
1993
1994     gtk_tree_path_free (column->priv->initial_path);
1995
1996     column->priv->initial_path = NULL;
1997
1998   }
1999
2000   g_signal_handler_disconnect (column->priv->panarea,
2001                                column->priv->realize_handler);
2002
2003   return FALSE;
2004 }
2005
2006 static void
2007 hildon_touch_selector_scroll_to (HildonTouchSelectorColumn *column,
2008                                  GtkTreeView *tv,
2009                                  GtkTreePath *path)
2010 {
2011   if (GTK_WIDGET_REALIZED (column->priv->panarea)) {
2012     GdkRectangle rect;
2013     gint y;
2014
2015     gtk_tree_view_get_background_area (tv,
2016                                        path, NULL, &rect);
2017     gtk_tree_view_convert_bin_window_to_tree_coords (tv,
2018                                                      0, rect.y, NULL, &y);
2019
2020     hildon_pannable_area_scroll_to (HILDON_PANNABLE_AREA
2021                                     (column->priv->panarea), -1, y);
2022   } else {
2023     if (column->priv->realize_handler != 0) {
2024
2025       if (column->priv->initial_path) {
2026         gtk_tree_path_free (column->priv->initial_path);
2027         column->priv->initial_path = NULL;
2028       }
2029
2030       g_signal_handler_disconnect (column->priv->panarea,
2031                                    column->priv->realize_handler);
2032       column->priv->realize_handler = 0;
2033     }
2034
2035     column->priv->initial_path = gtk_tree_path_copy (path);
2036     column->priv->realize_handler =
2037       g_signal_connect_after (G_OBJECT (column->priv->panarea), "realize",
2038                               G_CALLBACK (on_realize_cb),
2039                               column);
2040   }
2041 }
2042
2043 /**
2044  *
2045  * Center on the selected item of a concrete column
2046  *
2047  * Returns: TRUE if was able to do that
2048  *          FALSE otherwise
2049  */
2050 static gboolean
2051 _hildon_touch_selector_center_on_selected_items (HildonTouchSelector *selector,
2052                                                  HildonTouchSelectorColumn *column)
2053 {
2054   GtkTreePath *path = NULL;
2055   GList *selected_rows = NULL;
2056   gint num_column = -1;
2057
2058   num_column = g_slist_index (selector->priv->columns, column);
2059
2060   selected_rows = hildon_touch_selector_get_selected_rows (selector, num_column);
2061   if (selected_rows) {
2062     search_nearest_element (HILDON_PANNABLE_AREA (column->priv->panarea),
2063                              GTK_TREE_VIEW (column->priv->tree_view),
2064                              selected_rows,
2065                              &path);
2066
2067     if (path != NULL) {
2068       hildon_touch_selector_scroll_to (column,
2069                                        GTK_TREE_VIEW (column->priv->tree_view),
2070                                        path);
2071     } else {
2072       return FALSE;
2073     }
2074
2075     g_list_foreach (selected_rows, (GFunc) (gtk_tree_path_free), NULL);
2076     g_list_free (selected_rows);
2077   }
2078
2079   return TRUE;
2080 }
2081
2082 static gboolean
2083 _hildon_touch_selector_has_multiple_selection (HildonTouchSelector * selector)
2084 {
2085   HildonTouchSelectorSelectionMode mode;
2086   gint n_columns;
2087
2088   n_columns = hildon_touch_selector_get_num_columns (selector);
2089   mode = hildon_touch_selector_get_column_selection_mode (selector);
2090
2091   return ((n_columns > 1) || (mode == HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE));
2092 }
2093
2094 /**
2095  * hildon_touch_selector_has_multiple_selection:
2096  * @selector: A #HildonTouchSelector
2097  *
2098  * Determines whether @selector is complex enough to actually require an
2099  * extra selection step than only picking an item. This is normally %TRUE
2100  * if @selector has multiple columns, multiple selection, or when it is a
2101  * more complex widget, like #HildonTouchSelectorEntry.
2102  *
2103  * This information is useful for widgets containing a #HildonTouchSelector,
2104  * like #HildonPickerDialog, that could need a "Done" button, in case that
2105  * its internal #HildonTouchSelector has multiple columns, for instance.
2106  *
2107  * Returns: %TRUE if @selector requires multiple selection steps.
2108  *
2109  * Since: 2.2
2110  **/
2111 gboolean
2112 hildon_touch_selector_has_multiple_selection (HildonTouchSelector * selector)
2113 {
2114   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), FALSE);
2115
2116   return HILDON_TOUCH_SELECTOR_GET_CLASS (selector)->has_multiple_selection (selector);
2117 }
2118
2119
2120 /**
2121  * hildon_touch_selector_get_column:
2122  * @selector: A #HildonTouchSelector
2123  * @column: a column number
2124  *
2125  * Use this method to retrieve a #HildonTouchSelectorColumn. Then, you can use
2126  * the #GtkCellLayout interface to set up the layout of the column.
2127  *
2128  * Returns: the @column<!-- -->-th #HildonTouchSelectorColumn in @selector
2129  *
2130  * Since: 2.2
2131  **/
2132 HildonTouchSelectorColumn *
2133 hildon_touch_selector_get_column (HildonTouchSelector * selector,
2134                                   gint column)
2135 {
2136   gint num_columns = -1;
2137
2138   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), NULL);
2139   num_columns = hildon_touch_selector_get_num_columns (selector);
2140   g_return_val_if_fail (column < num_columns && column >= 0, NULL);
2141
2142   return g_slist_nth_data (selector->priv->columns, column);
2143 }
2144
2145
2146 /**
2147  * hildon_touch_selector_center_on_selected:
2148  * @selector: a #HildonTouchSelector
2149  *
2150  * Ensures all the columns in a #HildonTouchSelector show a selected
2151  * item. If one of the columns is in
2152  * %HILDON_TOUCH_SELECTOR_SELECTION_MODE_MULTIPLE mode, that column
2153  * will be scrolled to ensure the selected item that is closest to the
2154  * currently visible area is shown.
2155  *
2156  * Since: 2.2
2157  **/
2158 void
2159 hildon_touch_selector_center_on_selected         (HildonTouchSelector *selector)
2160 {
2161   GSList *iter = NULL;
2162
2163   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
2164
2165   for (iter = selector->priv->columns; iter; iter = g_slist_next (iter)) {
2166     _hildon_touch_selector_center_on_selected_items (selector,
2167                                                     HILDON_TOUCH_SELECTOR_COLUMN (iter->data));
2168   }
2169 }
2170
2171 /**
2172  * hildon_touch_selector_optimal_size_request
2173  * @selector: a #HildonTouchSelector
2174  * @requisition: a #GtkRequisition
2175  *
2176  * Gets the optimal size request of the touch selector. This function is mostly
2177  * intended for dialog implementations that include a #HildonTouchSelector and
2178  * want to optimize the screen real state, for example, when you want a dialog
2179  * to show as much of the selector, avoiding any extra empty space below the
2180  * selector.
2181  *
2182  * See #HildonPickerDialog implementation for an example.
2183  *
2184  * This function is oriented to be used in the size_request of a dialog or window,
2185  * if you are not sure do not use it.
2186  *
2187  * There is a precondition to this function: Since this function does not
2188  * call the "size_request" method, it can only be used when you know that
2189  * gtk_widget_size_request() has been called since the last time a resize was
2190  * queued.
2191  *
2192  * Since: 2.2
2193  **/
2194 void
2195 hildon_touch_selector_optimal_size_request      (HildonTouchSelector *selector,
2196                                                  GtkRequisition *requisition)
2197 {
2198   GSList *iter = NULL;
2199   gint height = 0;
2200   gint base_height = 0;
2201
2202   g_return_if_fail (HILDON_IS_TOUCH_SELECTOR (selector));
2203
2204   iter = selector->priv->columns;
2205
2206   /* Default optimal values are the current ones */
2207   gtk_widget_get_child_requisition (GTK_WIDGET (selector),
2208                                     requisition);
2209
2210   if (iter == NULL) {
2211     height = requisition->height;
2212   } else {
2213     /* we use the normal requisition as base, as the touch selector can has
2214        extra widgets, not only the columns (ie: HildonTouchSelectorEntry) */
2215     base_height = requisition->height;
2216   }
2217
2218   /* Compute optimal height for the columns */
2219   while (iter) {
2220     HildonTouchSelectorColumn *column;
2221     GtkWidget *child;
2222     GtkRequisition child_requisition = {0};
2223
2224     column = HILDON_TOUCH_SELECTOR_COLUMN (iter->data);
2225     child = GTK_WIDGET (column->priv->tree_view);
2226
2227     gtk_widget_get_child_requisition (child, &child_requisition);
2228
2229     height = MAX (height, child_requisition.height);
2230
2231     iter = g_slist_next (iter);
2232   }
2233
2234   requisition->height = base_height + height;
2235 }
2236