src/ui/gui/psppire-selector.c

   1 /*
   2    PSPPIRE --- A Graphical User Interface for PSPP
   3    Copyright (C) 2007  Free Software Foundation
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18    02110-1301, USA. */
  19
  20 /*
  21   This module provides a widget, PsppireSelector derived from
  22   GtkButton.
  23
  24   It contains a GtkArrow, and is used for selecting objects from a
  25   GtkTreeView and putting them into a destination widget (often
  26   another GtkTreeView).  Typically this is used in psppire for
  27   selecting variables, thus:
  28
  29
  30   +----------------------------------------------------------+
  31   |                                                          |
  32   |     Source Widget                       Dest Widget      |
  33   |   +----------------+                 +----------------+  |
  34   |   | Variable0      |                 | Variable2      |  |
  35   |   | Variable1      |                 |                |  |
  36   |   | Variable3      |                 |                |  |
  37   |   |                |    Selector     |                |  |
  38   |   |                |                 |                |  |
  39   |   |                |    +------+     |                |  |
  40   |   |                |    | |\   |     |                |  |
  41   |   |                |    | | \  |     |                |  |
  42   |   |                |    | | /  |     |                |  |
  43   |   |                |    | |/   |     |                |  |
  44   |   |                |    +------+     |                |  |
  45   |   |                |                 |                |  |
  46   |   |                |                 |                |  |
  47   |   |                |                 |                |  |
  48   |   |                |                 |                |  |
  49   |   +----------------+                 +----------------+  |
  50   |                                                          |
  51   +----------------------------------------------------------+
  52
  53   The Source Widget is always a GtkTreeView.  The Dest Widget may be a
  54   GtkTreeView or a GtkEntry (other destination widgets may be
  55   supported in the future).
  56
  57   Widgets may be source to more than one PsppireSelector.
  58 */
  59
  60
  61 #include <config.h>
  62
  63 #include <gtk/gtksignal.h>
  64 #include <gtk/gtkbutton.h>
  65 #include <gtk/gtkentry.h>
  66
  67 #include "psppire-selector.h"
  68
  69 #include <gtk/gtktreeview.h>
  70 #include <gtk/gtktreeselection.h>
  71 #include <gtk/gtkwidget.h>
  72
  73 static void psppire_selector_base_finalize (PsppireSelectorClass *, gpointer);
  74 static void psppire_selector_base_init     (PsppireSelectorClass *class);
  75 static void psppire_selector_class_init    (PsppireSelectorClass *class);
  76 static void psppire_selector_init          (PsppireSelector      *selector);
  77
  78
  79 static void set_direction (PsppireSelector *, enum psppire_selector_dir);
  80
  81
  82 enum  {SELECTED,    /* Emitted when an item is inserted into dest */
  83        DE_SELECTED, /* Emitted when an item is removed from dest */
  84        n_SIGNALS};
  85
  86 static guint signals [n_SIGNALS];
  87
  88
  89 GType
  90 psppire_selector_get_type (void)
  91 {
  92   static GType psppire_selector_type = 0;
  93
  94   if (!psppire_selector_type)
  95     {
  96       static const GTypeInfo psppire_selector_info =
  97       {
  98         sizeof (PsppireSelectorClass),
  99         (GBaseInitFunc) psppire_selector_base_init,
 100         (GBaseFinalizeFunc) psppire_selector_base_finalize,
 101         (GClassInitFunc)psppire_selector_class_init,
 102         (GClassFinalizeFunc) NULL,
 103         NULL,
 104         sizeof (PsppireSelector),
 105         0,
 106         (GInstanceInitFunc) psppire_selector_init,
 107       };
 108
 109       psppire_selector_type =
 110         g_type_register_static (GTK_TYPE_BUTTON, "PsppireSelector",
 111                                 &psppire_selector_info, 0);
 112     }
 113
 114   return psppire_selector_type;
 115 }
 116
 117
 118 static void
 119 psppire_selector_finalize (GObject *object)
 120 {
 121 }
 122
 123 /* Properties */
 124 enum
 125 {
 126   PROP_0,
 127   PROP_ORIENTATION
 128 };
 129
 130
 131 static void
 132 psppire_selector_set_property (GObject         *object,
 133                                guint            prop_id,
 134                                const GValue    *value,
 135                                GParamSpec      *pspec)
 136 {
 137   PsppireSelector *selector = PSPPIRE_SELECTOR (object);
 138
 139   switch (prop_id)
 140     {
 141     case PROP_ORIENTATION:
 142       selector->orientation = g_value_get_enum (value);
 143       set_direction (selector, selector->direction);
 144       break;
 145     default:
 146       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 147       break;
 148     };
 149 }
 150
 151
 152 static void
 153 psppire_selector_get_property (GObject         *object,
 154                                guint            prop_id,
 155                                GValue          *value,
 156                                GParamSpec      *pspec)
 157 {
 158   PsppireSelector *selector = PSPPIRE_SELECTOR (object);
 159
 160   switch (prop_id)
 161     {
 162     case PROP_ORIENTATION:
 163       g_value_set_enum (value, selector->orientation);
 164       break;
 165     default:
 166       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 167       break;
 168     };
 169 }
 170
 171
 172
 173 static void
 174 psppire_selector_class_init (PsppireSelectorClass *class)
 175 {
 176   GObjectClass *object_class = G_OBJECT_CLASS (class);
 177   GParamSpec *orientation_spec =
 178     g_param_spec_enum ("orientation",
 179                        "Orientation",
 180                        "Where the selector is relative to its subjects",
 181                        G_TYPE_PSPPIRE_SELECTOR_ORIENTATION,
 182                        PSPPIRE_SELECT_SOURCE_BEFORE_DEST /* default value */,
 183                        G_PARAM_CONSTRUCT_ONLY |G_PARAM_READWRITE);
 184
 185
 186   object_class->set_property = psppire_selector_set_property;
 187   object_class->get_property = psppire_selector_get_property;
 188
 189   g_object_class_install_property (object_class,
 190                                    PROP_ORIENTATION,
 191                                    orientation_spec);
 192
 193   signals [SELECTED] =
 194     g_signal_new ("selected",
 195                   G_TYPE_FROM_CLASS (class),
 196                   G_SIGNAL_RUN_FIRST,
 197                   0,
 198                   NULL, NULL,
 199                   g_cclosure_marshal_VOID__VOID,
 200                   G_TYPE_NONE,
 201                   0);
 202
 203   signals [DE_SELECTED] =
 204     g_signal_new ("de-selected",
 205                   G_TYPE_FROM_CLASS (class),
 206                   G_SIGNAL_RUN_FIRST,
 207                   0,
 208                   NULL, NULL,
 209                   g_cclosure_marshal_VOID__VOID,
 210                   G_TYPE_NONE,
 211                   0);
 212 }
 213
 214
 215 static void
 216 psppire_selector_base_init (PsppireSelectorClass *class)
 217 {
 218   GObjectClass *object_class = G_OBJECT_CLASS (class);
 219
 220   object_class->finalize = psppire_selector_finalize;
 221
 222   class->source_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
 223 }
 224
 225
 226
 227 static void
 228 psppire_selector_base_finalize(PsppireSelectorClass *class,
 229                                 gpointer class_data)
 230 {
 231   g_hash_table_destroy (class->source_hash);
 232 }
 233
 234
 235 static void
 236 psppire_selector_init (PsppireSelector *selector)
 237 {
 238   selector->arrow = gtk_arrow_new (GTK_ARROW_LEFT, GTK_SHADOW_NONE);
 239   selector->filtered_source = NULL;
 240
 241   gtk_container_add (GTK_CONTAINER (selector), selector->arrow);
 242
 243   gtk_widget_show (selector->arrow);
 244
 245   selector->selecting = FALSE;
 246 }
 247
 248
 249 GtkWidget*
 250 psppire_selector_new (void)
 251 {
 252   return GTK_WIDGET (g_object_new (psppire_selector_get_type (), NULL));
 253 }
 254
 255
 256 static void
 257 set_direction (PsppireSelector *selector, enum psppire_selector_dir d)
 258 {
 259   selector->direction = d;
 260
 261   /* FIXME: Need to reverse the arrow direction if an RTL locale is in
 262      effect */
 263   if ( d == PSPPIRE_SELECTOR_SOURCE_TO_DEST )
 264     {
 265       switch (selector->orientation)
 266         {
 267         case   PSPPIRE_SELECT_SOURCE_BEFORE_DEST:
 268           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_RIGHT, NULL);
 269           break;
 270         case   PSPPIRE_SELECT_SOURCE_AFTER_DEST:
 271           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_LEFT, NULL);
 272           break;
 273         case   PSPPIRE_SELECT_SOURCE_ABOVE_DEST:
 274           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_DOWN, NULL);
 275           break;
 276         case   PSPPIRE_SELECT_SOURCE_BELOW_DEST:
 277           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_UP, NULL);
 278           break;
 279         default:
 280           g_assert_not_reached ();
 281           break;
 282         };
 283     }
 284   else
 285     {
 286       switch (selector->orientation)
 287         {
 288         case   PSPPIRE_SELECT_SOURCE_BEFORE_DEST:
 289           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_LEFT, NULL);
 290           break;
 291         case   PSPPIRE_SELECT_SOURCE_AFTER_DEST:
 292           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_RIGHT, NULL);
 293           break;
 294         case   PSPPIRE_SELECT_SOURCE_ABOVE_DEST:
 295           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_UP, NULL);
 296           break;
 297         case   PSPPIRE_SELECT_SOURCE_BELOW_DEST:
 298           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_DOWN, NULL);
 299           break;
 300         default:
 301           g_assert_not_reached ();
 302           break;
 303         };
 304
 305     }
 306 }
 307
 308 /* Callback for when the source selection changes */
 309 static void
 310 on_source_select (GtkTreeSelection *treeselection, gpointer data)
 311 {
 312   PsppireSelector *selector = data;
 313
 314   set_direction (selector, PSPPIRE_SELECTOR_SOURCE_TO_DEST);
 315
 316   if ( GTK_IS_ENTRY (selector->dest) )
 317     {
 318       gtk_widget_set_sensitive (GTK_WIDGET (selector),
 319                                 gtk_tree_selection_count_selected_rows
 320                                 (treeselection) <= 1 );
 321     }
 322 }
 323
 324 /* Callback for when the destination treeview selection changes */
 325 static void
 326 on_dest_treeview_select (GtkTreeSelection *treeselection, gpointer data)
 327 {
 328   PsppireSelector *selector = data;
 329
 330   set_direction (selector, PSPPIRE_SELECTOR_DEST_TO_SOURCE);
 331 }
 332
 333 /* Callback for source deselection, when the dest is GtkEntry */
 334 static void
 335 de_select_selection_entry (PsppireSelector *selector)
 336 {
 337   gtk_entry_set_text (GTK_ENTRY (selector->dest), "");
 338 }
 339
 340 /* Callback for source deselection, when the dest is GtkTreeView */
 341 static void
 342 de_select_selection_tree_view (PsppireSelector *selector)
 343 {
 344   GList *item;
 345
 346   GtkTreeSelection* selection =
 347     gtk_tree_view_get_selection ( GTK_TREE_VIEW (selector->dest));
 348
 349   GtkTreeModel *model =
 350     gtk_tree_view_get_model (GTK_TREE_VIEW (selector->dest));
 351
 352   GList *selected_rows =
 353     gtk_tree_selection_get_selected_rows (selection, NULL);
 354
 355   g_return_if_fail (selector->select_items);
 356
 357   /* Convert paths to RowRefs */
 358   for (item = g_list_first (selected_rows);
 359        item != NULL;
 360        item = g_list_next (item))
 361     {
 362       GtkTreeRowReference* rowref;
 363       GtkTreePath *path  = item->data;
 364
 365       rowref = gtk_tree_row_reference_new (GTK_TREE_MODEL (model), path);
 366
 367       item->data = rowref ;
 368       gtk_tree_path_free (path);
 369     }
 370
 371   /* Remove each selected row from the dest widget */
 372   for (item = g_list_first (selected_rows);
 373        item != NULL;
 374        item = g_list_next (item))
 375     {
 376       GtkTreeIter iter;
 377       GtkTreeRowReference *rr = item->data;
 378
 379       GtkTreePath *path = gtk_tree_row_reference_get_path (rr);
 380
 381       gtk_tree_model_get_iter (GTK_TREE_MODEL (model), &iter, path);
 382
 383       gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
 384
 385       gtk_tree_path_free (path);
 386     }
 387
 388   /* Delete list of RowRefs and its contents */
 389   g_list_foreach (selected_rows, (GFunc) gtk_tree_row_reference_free, NULL);
 390   g_list_free (selected_rows);
 391 }
 392
 393
 394 /* Removes something from the DEST widget */
 395 static void
 396 de_select_selection (PsppireSelector *selector)
 397 {
 398   selector->selecting = TRUE;
 399
 400   if ( GTK_IS_TREE_VIEW (selector->dest ) )
 401     de_select_selection_tree_view (selector);
 402
 403   else if ( GTK_IS_ENTRY (selector->dest))
 404     de_select_selection_entry (selector);
 405
 406   else
 407     g_assert_not_reached ();
 408
 409   selector->selecting = FALSE;
 410
 411   gtk_tree_model_filter_refilter (selector->filtered_source);
 412
 413   g_signal_emit (selector, signals [DE_SELECTED], 0);
 414 }
 415
 416
 417 /* Puts something into the DEST widget */
 418 static void
 419 select_selection (PsppireSelector *selector)
 420 {
 421   GList *item ;
 422   GtkTreeSelection* selection =
 423     gtk_tree_view_get_selection ( GTK_TREE_VIEW (selector->source));
 424
 425   GList *selected_rows =
 426     gtk_tree_selection_get_selected_rows (selection, NULL);
 427
 428   GtkTreeModel *childmodel  = gtk_tree_model_filter_get_model
 429     (selector->filtered_source);
 430
 431   g_return_if_fail (selector->select_items);
 432
 433   selector->selecting = TRUE;
 434
 435   for (item = g_list_first (selected_rows);
 436        item != NULL;
 437        item = g_list_next (item))
 438     {
 439       GtkTreeIter child_iter;
 440       GtkTreeIter iter;
 441       GtkTreePath *path  = item->data;
 442
 443       gtk_tree_model_get_iter (GTK_TREE_MODEL (selector->filtered_source),
 444                                &iter, path);
 445
 446       gtk_tree_model_filter_convert_iter_to_child_iter
 447         (selector->filtered_source,
 448          &child_iter,
 449          &iter);
 450
 451       selector->select_items (child_iter,
 452                               selector->dest,
 453                               childmodel);
 454     }
 455
 456   g_list_foreach (selected_rows, (GFunc) gtk_tree_path_free, NULL);
 457   g_list_free (selected_rows);
 458
 459   gtk_tree_model_filter_refilter (selector->filtered_source);
 460
 461   g_signal_emit (selector, signals [SELECTED], 0);
 462
 463   selector->selecting = FALSE;
 464 }
 465
 466 /* Callback for when the source treeview is activated (double clicked) */
 467 static void
 468 on_row_activate (GtkTreeView       *tree_view,
 469                  GtkTreePath       *path,
 470                  GtkTreeViewColumn *column,
 471                  gpointer           data)
 472 {
 473   PsppireSelector *selector  = data;
 474
 475   select_selection (selector);
 476 }
 477
 478 /* Callback for when the selector button is clicked */
 479 static void
 480 on_click (PsppireSelector *selector, gpointer data)
 481 {
 482   switch (selector->direction)
 483     {
 484     case PSPPIRE_SELECTOR_SOURCE_TO_DEST:
 485       select_selection (selector);
 486       break;
 487     case PSPPIRE_SELECTOR_DEST_TO_SOURCE:
 488       de_select_selection (selector);
 489       break;
 490     default:
 491       g_assert_not_reached ();
 492       break;
 493     }
 494 }
 495
 496 /* Default visibility filter for GtkTreeView DEST widget */
 497 static gboolean
 498 is_item_in_dest (GtkTreeModel *model, GtkTreeIter *iter,
 499                  PsppireSelector *selector)
 500 {
 501   GtkTreeModel *dest_model;
 502   GtkTreeIter dest_iter;
 503   GtkTreeIter source_iter;
 504   gint index;
 505   GtkTreePath *path ;
 506   GtkTreeModel *source_model;
 507
 508   if ( GTK_IS_TREE_MODEL_FILTER (model) )
 509     {
 510       source_model = gtk_tree_model_filter_get_model
 511         (GTK_TREE_MODEL_FILTER (model));
 512
 513       gtk_tree_model_filter_convert_iter_to_child_iter
 514         ( GTK_TREE_MODEL_FILTER (model),  &source_iter,  iter  );
 515     }
 516   else
 517     {
 518       source_model = model;
 519       source_iter = *iter;
 520     }
 521
 522   dest_model = gtk_tree_view_get_model (GTK_TREE_VIEW (selector->dest));
 523
 524   path = gtk_tree_model_get_path (source_model, &source_iter);
 525
 526   index = *gtk_tree_path_get_indices (path);
 527
 528   gtk_tree_path_free (path);
 529
 530   if ( ! gtk_tree_model_get_iter_first (dest_model, &dest_iter) )
 531     return FALSE;
 532
 533   do
 534     {
 535       GValue value = {0};
 536       gtk_tree_model_get_value (dest_model, &dest_iter, 0, &value);
 537
 538       if ( g_value_get_int (&value) == index)
 539         return TRUE;
 540     }
 541   while (gtk_tree_model_iter_next (dest_model, &dest_iter));
 542
 543   return FALSE;
 544 }
 545
 546 /* Visibility function for items in the SOURCE widget.
 547    Returns TRUE iff *all* the selectors for which SOURCE is associated
 548    are visible */
 549 static gboolean
 550 is_source_item_visible (GtkTreeModel *childmodel,
 551                         GtkTreeIter *iter, gpointer data)
 552 {
 553   PsppireSelector *selector = data;
 554   PsppireSelectorClass *class = g_type_class_peek (PSPPIRE_SELECTOR_TYPE);
 555
 556   GList *list = NULL;
 557
 558   list = g_hash_table_lookup (class->source_hash, selector->source);
 559
 560   while (list)
 561     {
 562       PsppireSelector *selector = list->data;
 563
 564       if ( selector->filter (childmodel, iter, selector))
 565           return FALSE;
 566
 567       list = list->next;
 568     }
 569
 570
 571   return TRUE;
 572 }
 573
 574 /* set the source widget to SOURCE */
 575 static void
 576 set_tree_view_source (PsppireSelector *selector,
 577                       GtkTreeView *source)
 578 {
 579   GtkTreeSelection* selection ;
 580   GList *list = NULL;
 581
 582   PsppireSelectorClass *class = g_type_class_peek (PSPPIRE_SELECTOR_TYPE);
 583
 584   if ( ! (list = g_hash_table_lookup (class->source_hash, source)))
 585     {
 586       selector->filtered_source =
 587         GTK_TREE_MODEL_FILTER (gtk_tree_model_filter_new
 588                                (gtk_tree_view_get_model (source),  NULL));
 589
 590       gtk_tree_view_set_model (source, NULL);
 591
 592       gtk_tree_view_set_model (source,
 593                                GTK_TREE_MODEL (selector->filtered_source));
 594
 595       list = g_list_append (list, selector);
 596       g_hash_table_insert (class->source_hash, source, list);
 597
 598
 599       gtk_tree_model_filter_set_visible_func (selector->filtered_source,
 600                                               is_source_item_visible,
 601                                               selector,
 602                                               NULL);
 603     }
 604   else
 605     {  /* Append this selector to the list and push the <source,list>
 606           pair onto the hash table */
 607
 608       selector->filtered_source = GTK_TREE_MODEL_FILTER (
 609         gtk_tree_view_get_model (source));
 610
 611       list = g_list_append (list, selector);
 612       g_hash_table_replace (class->source_hash, source, list);
 613     }
 614
 615   selection = gtk_tree_view_get_selection (source);
 616
 617   g_signal_connect (source, "row-activated", G_CALLBACK (on_row_activate),
 618                     selector);
 619
 620   g_signal_connect (selection, "changed", G_CALLBACK (on_source_select),
 621                     selector);
 622 }
 623
 624
 625 /*
 626    Callback for when the destination treeview's data changes
 627  */
 628 static void
 629 on_dest_data_change (GtkTreeModel *tree_model,
 630                      GtkTreePath  *path,
 631                      GtkTreeIter  *iter,
 632                      gpointer      user_data)
 633 {
 634   PsppireSelector *selector = user_data;
 635
 636   if ( selector->selecting) return;
 637
 638   gtk_tree_model_filter_refilter (selector->filtered_source);
 639 }
 640
 641
 642 static void
 643 on_dest_data_delete (GtkTreeModel *tree_model,
 644                      GtkTreePath  *path,
 645                      gpointer      user_data)
 646 {
 647   PsppireSelector *selector = user_data;
 648
 649   if ( selector->selecting ) return;
 650
 651   gtk_tree_model_filter_refilter (selector->filtered_source);
 652 }
 653
 654
 655
 656
 657 /* Set the destination widget to DEST */
 658 static void
 659 set_tree_view_dest (PsppireSelector *selector,
 660                     GtkTreeView *dest)
 661 {
 662   GtkTreeSelection* selection = gtk_tree_view_get_selection (dest);
 663   GtkTreeModel *model = gtk_tree_view_get_model (dest);
 664
 665   gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
 666
 667   g_signal_connect (selection, "changed", G_CALLBACK (on_dest_treeview_select),
 668                     selector);
 669
 670   g_signal_connect (model, "row-changed", G_CALLBACK (on_dest_data_change),
 671                       selector);
 672
 673   g_signal_connect (model, "row-deleted", G_CALLBACK (on_dest_data_delete),
 674                       selector);
 675
 676 }
 677
 678 /* Callback for when the DEST GtkEntry is activated (Enter is pressed) */
 679 static void
 680 on_entry_activate (GtkEntry *w, gpointer data)
 681 {
 682   PsppireSelector * selector = data;
 683
 684   gtk_tree_model_filter_refilter (selector->filtered_source);
 685 }
 686
 687 /* Callback for when the DEST GtkEntry is selected (clicked) */
 688 static gboolean
 689 on_entry_dest_select (GtkWidget *widget, GdkEventFocus *event, gpointer data)
 690 {
 691   PsppireSelector * selector = data;
 692
 693   set_direction (selector, PSPPIRE_SELECTOR_DEST_TO_SOURCE);
 694
 695   return FALSE;
 696 }
 697
 698 /* Set DEST to be the destination GtkEntry widget */
 699 static void
 700 set_entry_dest (PsppireSelector *selector,
 701                 GtkEntry *dest)
 702 {
 703   g_signal_connect (dest, "activate", G_CALLBACK (on_entry_activate),
 704                     selector);
 705
 706   g_signal_connect (dest, "focus-in-event", G_CALLBACK (on_entry_dest_select),
 707                     selector);
 708 }
 709
 710
 711 /* Set SOURCE and DEST for this selector, and
 712    set SELECT_FUNC and FILTER_FUNC */
 713 void
 714 psppire_selector_set_subjects (PsppireSelector *selector,
 715                                GtkWidget *source,
 716                                GtkWidget *dest,
 717                                SelectItemsFunc *select_func,
 718                                FilterItemsFunc *filter_func )
 719 {
 720   g_assert(selector);
 721
 722   selector->filter = filter_func ;
 723
 724   selector->source = source;
 725   selector->dest = dest;
 726
 727   if ( filter_func == NULL)
 728     {
 729       if  (GTK_IS_TREE_VIEW (dest))
 730         selector->filter = is_item_in_dest;
 731     }
 732
 733   g_signal_connect (selector, "clicked", G_CALLBACK (on_click), NULL);
 734
 735   if ( GTK_IS_TREE_VIEW (source))
 736     set_tree_view_source (selector, GTK_TREE_VIEW (source) );
 737   else
 738     g_error ("Unsupported source widget: %s", G_OBJECT_TYPE_NAME (source));
 739
 740   g_assert ( GTK_IS_TREE_MODEL_FILTER (selector->filtered_source));
 741
 742   if  ( GTK_IS_TREE_VIEW (dest))
 743     set_tree_view_dest (selector, GTK_TREE_VIEW (dest));
 744
 745   else if ( GTK_IS_ENTRY (dest))
 746     set_entry_dest (selector, GTK_ENTRY (dest));
 747
 748   else
 749     g_error ("Unsupported destination widget: %s", G_OBJECT_TYPE_NAME (dest));
 750
 751   selector->select_items = select_func;
 752 }
 753
 754
 755
 756 GType
 757 psppire_selector_orientation_get_type (void)
 758 {
 759   static GType etype = 0;
 760   if (etype == 0) {
 761     static const GEnumValue values[] = {
 762       { PSPPIRE_SELECT_SOURCE_BEFORE_DEST, "PSPPIRE_SELECT_SOURCE_BEFORE_DEST", "source before destination" },
 763       { PSPPIRE_SELECT_SOURCE_AFTER_DEST, "PSPPIRE_SELECT_SOURCE_AFTER_DEST", "source after destination" },
 764       { PSPPIRE_SELECT_SOURCE_ABOVE_DEST, "PSPPIRE_SELECT_SOURCE_ABOVE_DEST", "source above destination" },
 765       { PSPPIRE_SELECT_SOURCE_BELOW_DEST, "PSPPIRE_SELECT_SOURCE_BELOW_DEST", "source below destination" },
 766       { 0, NULL, NULL }
 767     };
 768     etype = g_enum_register_static (g_intern_static_string ("PsppireSelectorOrientation"), values);
 769   }
 770   return etype;
 771 }