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/gtktextview.h>
  72 #include <gtk/gtkwidget.h>
  73
  74 static void psppire_selector_base_finalize (PsppireSelectorClass *, gpointer);
  75 static void psppire_selector_base_init     (PsppireSelectorClass *class);
  76 static void psppire_selector_class_init    (PsppireSelectorClass *class);
  77 static void psppire_selector_init          (PsppireSelector      *selector);
  78
  79
  80 static void set_direction (PsppireSelector *, enum psppire_selector_dir);
  81
  82
  83 enum  {SELECTED,    /* Emitted when an item is inserted into dest */
  84        DE_SELECTED, /* Emitted when an item is removed from dest */
  85        n_SIGNALS};
  86
  87 static guint signals [n_SIGNALS];
  88
  89
  90 GType
  91 psppire_selector_get_type (void)
  92 {
  93   static GType psppire_selector_type = 0;
  94
  95   if (!psppire_selector_type)
  96     {
  97       static const GTypeInfo psppire_selector_info =
  98       {
  99         sizeof (PsppireSelectorClass),
 100         (GBaseInitFunc) psppire_selector_base_init,
 101         (GBaseFinalizeFunc) psppire_selector_base_finalize,
 102         (GClassInitFunc)psppire_selector_class_init,
 103         (GClassFinalizeFunc) NULL,
 104         NULL,
 105         sizeof (PsppireSelector),
 106         0,
 107         (GInstanceInitFunc) psppire_selector_init,
 108       };
 109
 110       psppire_selector_type =
 111         g_type_register_static (GTK_TYPE_BUTTON, "PsppireSelector",
 112                                 &psppire_selector_info, 0);
 113     }
 114
 115   return psppire_selector_type;
 116 }
 117
 118
 119 static void
 120 psppire_selector_finalize (GObject *object)
 121 {
 122 }
 123
 124 /* Properties */
 125 enum
 126 {
 127   PROP_0,
 128   PROP_ORIENTATION
 129 };
 130
 131
 132 static void
 133 psppire_selector_set_property (GObject         *object,
 134                                guint            prop_id,
 135                                const GValue    *value,
 136                                GParamSpec      *pspec)
 137 {
 138   PsppireSelector *selector = PSPPIRE_SELECTOR (object);
 139
 140   switch (prop_id)
 141     {
 142     case PROP_ORIENTATION:
 143       selector->orientation = g_value_get_enum (value);
 144       set_direction (selector, selector->direction);
 145       break;
 146     default:
 147       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 148       break;
 149     };
 150 }
 151
 152
 153 static void
 154 psppire_selector_get_property (GObject         *object,
 155                                guint            prop_id,
 156                                GValue          *value,
 157                                GParamSpec      *pspec)
 158 {
 159   PsppireSelector *selector = PSPPIRE_SELECTOR (object);
 160
 161   switch (prop_id)
 162     {
 163     case PROP_ORIENTATION:
 164       g_value_set_enum (value, selector->orientation);
 165       break;
 166     default:
 167       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 168       break;
 169     };
 170 }
 171
 172
 173
 174 static void
 175 psppire_selector_class_init (PsppireSelectorClass *class)
 176 {
 177   GObjectClass *object_class = G_OBJECT_CLASS (class);
 178   GParamSpec *orientation_spec =
 179     g_param_spec_enum ("orientation",
 180                        "Orientation",
 181                        "Where the selector is relative to its subjects",
 182                        G_TYPE_PSPPIRE_SELECTOR_ORIENTATION,
 183                        PSPPIRE_SELECT_SOURCE_BEFORE_DEST /* default value */,
 184                        G_PARAM_CONSTRUCT_ONLY |G_PARAM_READWRITE);
 185
 186
 187   object_class->set_property = psppire_selector_set_property;
 188   object_class->get_property = psppire_selector_get_property;
 189
 190   g_object_class_install_property (object_class,
 191                                    PROP_ORIENTATION,
 192                                    orientation_spec);
 193
 194   signals [SELECTED] =
 195     g_signal_new ("selected",
 196                   G_TYPE_FROM_CLASS (class),
 197                   G_SIGNAL_RUN_FIRST,
 198                   0,
 199                   NULL, NULL,
 200                   g_cclosure_marshal_VOID__VOID,
 201                   G_TYPE_NONE,
 202                   0);
 203
 204   signals [DE_SELECTED] =
 205     g_signal_new ("de-selected",
 206                   G_TYPE_FROM_CLASS (class),
 207                   G_SIGNAL_RUN_FIRST,
 208                   0,
 209                   NULL, NULL,
 210                   g_cclosure_marshal_VOID__VOID,
 211                   G_TYPE_NONE,
 212                   0);
 213 }
 214
 215
 216 static void
 217 psppire_selector_base_init (PsppireSelectorClass *class)
 218 {
 219   GObjectClass *object_class = G_OBJECT_CLASS (class);
 220
 221   object_class->finalize = psppire_selector_finalize;
 222
 223   class->source_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
 224 }
 225
 226
 227
 228 static void
 229 psppire_selector_base_finalize(PsppireSelectorClass *class,
 230                                 gpointer class_data)
 231 {
 232   g_hash_table_destroy (class->source_hash);
 233 }
 234
 235
 236 static void
 237 psppire_selector_init (PsppireSelector *selector)
 238 {
 239   selector->arrow = gtk_arrow_new (GTK_ARROW_LEFT, GTK_SHADOW_NONE);
 240   selector->filtered_source = NULL;
 241
 242   gtk_container_add (GTK_CONTAINER (selector), selector->arrow);
 243
 244   gtk_widget_show (selector->arrow);
 245
 246   selector->selecting = FALSE;
 247 }
 248
 249
 250 GtkWidget*
 251 psppire_selector_new (void)
 252 {
 253   return GTK_WIDGET (g_object_new (psppire_selector_get_type (), NULL));
 254 }
 255
 256
 257 static void
 258 set_direction (PsppireSelector *selector, enum psppire_selector_dir d)
 259 {
 260   selector->direction = d;
 261
 262   /* FIXME: Need to reverse the arrow direction if an RTL locale is in
 263      effect */
 264   if ( d == PSPPIRE_SELECTOR_SOURCE_TO_DEST )
 265     {
 266       switch (selector->orientation)
 267         {
 268         case   PSPPIRE_SELECT_SOURCE_BEFORE_DEST:
 269           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_RIGHT, NULL);
 270           break;
 271         case   PSPPIRE_SELECT_SOURCE_AFTER_DEST:
 272           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_LEFT, NULL);
 273           break;
 274         case   PSPPIRE_SELECT_SOURCE_ABOVE_DEST:
 275           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_DOWN, NULL);
 276           break;
 277         case   PSPPIRE_SELECT_SOURCE_BELOW_DEST:
 278           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_UP, NULL);
 279           break;
 280         default:
 281           g_assert_not_reached ();
 282           break;
 283         };
 284     }
 285   else
 286     {
 287       switch (selector->orientation)
 288         {
 289         case   PSPPIRE_SELECT_SOURCE_BEFORE_DEST:
 290           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_LEFT, NULL);
 291           break;
 292         case   PSPPIRE_SELECT_SOURCE_AFTER_DEST:
 293           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_RIGHT, NULL);
 294           break;
 295         case   PSPPIRE_SELECT_SOURCE_ABOVE_DEST:
 296           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_UP, NULL);
 297           break;
 298         case   PSPPIRE_SELECT_SOURCE_BELOW_DEST:
 299           g_object_set (selector->arrow, "arrow-type", GTK_ARROW_DOWN, NULL);
 300           break;
 301         default:
 302           g_assert_not_reached ();
 303           break;
 304         };
 305
 306     }
 307 }
 308
 309 /* Callback for when the source selection changes */
 310 static void
 311 on_source_select (GtkTreeSelection *treeselection, gpointer data)
 312 {
 313   PsppireSelector *selector = data;
 314
 315   set_direction (selector, PSPPIRE_SELECTOR_SOURCE_TO_DEST);
 316
 317   if ( GTK_IS_ENTRY (selector->dest) )
 318     {
 319       gtk_widget_set_sensitive (GTK_WIDGET (selector),
 320                                 gtk_tree_selection_count_selected_rows
 321                                 (treeselection) <= 1 );
 322     }
 323 }
 324
 325 /* Callback for when the destination treeview selection changes */
 326 static void
 327 on_dest_treeview_select (GtkTreeSelection *treeselection, gpointer data)
 328 {
 329   PsppireSelector *selector = data;
 330
 331   set_direction (selector, PSPPIRE_SELECTOR_DEST_TO_SOURCE);
 332 }
 333
 334 /* Callback for source deselection, when the dest is GtkEntry */
 335 static void
 336 de_select_selection_entry (PsppireSelector *selector)
 337 {
 338   gtk_entry_set_text (GTK_ENTRY (selector->dest), "");
 339 }
 340
 341 /* Callback for source deselection, when the dest is GtkTreeView */
 342 static void
 343 de_select_selection_tree_view (PsppireSelector *selector)
 344 {
 345   GList *item;
 346
 347   GtkTreeSelection* selection =
 348     gtk_tree_view_get_selection ( GTK_TREE_VIEW (selector->dest));
 349
 350   GtkTreeModel *model =
 351     gtk_tree_view_get_model (GTK_TREE_VIEW (selector->dest));
 352
 353   GList *selected_rows =
 354     gtk_tree_selection_get_selected_rows (selection, NULL);
 355
 356   g_return_if_fail (selector->select_items);
 357
 358   /* Convert paths to RowRefs */
 359   for (item = g_list_first (selected_rows);
 360        item != NULL;
 361        item = g_list_next (item))
 362     {
 363       GtkTreeRowReference* rowref;
 364       GtkTreePath *path  = item->data;
 365
 366       rowref = gtk_tree_row_reference_new (GTK_TREE_MODEL (model), path);
 367
 368       item->data = rowref ;
 369       gtk_tree_path_free (path);
 370     }
 371
 372   /* Remove each selected row from the dest widget */
 373   for (item = g_list_first (selected_rows);
 374        item != NULL;
 375        item = g_list_next (item))
 376     {
 377       GtkTreeIter iter;
 378       GtkTreeRowReference *rr = item->data;
 379
 380       GtkTreePath *path = gtk_tree_row_reference_get_path (rr);
 381
 382       gtk_tree_model_get_iter (GTK_TREE_MODEL (model), &iter, path);
 383
 384       gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
 385
 386       gtk_tree_path_free (path);
 387     }
 388
 389   /* Delete list of RowRefs and its contents */
 390   g_list_foreach (selected_rows, (GFunc) gtk_tree_row_reference_free, NULL);
 391   g_list_free (selected_rows);
 392 }
 393
 394
 395 /* Removes something from the DEST widget */
 396 static void
 397 de_select_selection (PsppireSelector *selector)
 398 {
 399   selector->selecting = TRUE;
 400
 401   if ( GTK_IS_TREE_VIEW (selector->dest ) )
 402     de_select_selection_tree_view (selector);
 403
 404   else if ( GTK_IS_ENTRY (selector->dest))
 405     de_select_selection_entry (selector);
 406
 407   else
 408     g_assert_not_reached ();
 409
 410   selector->selecting = FALSE;
 411
 412   gtk_tree_model_filter_refilter (selector->filtered_source);
 413
 414   g_signal_emit (selector, signals [DE_SELECTED], 0);
 415 }
 416
 417
 418 /* Puts something into the DEST widget */
 419 static void
 420 select_selection (PsppireSelector *selector)
 421 {
 422   GList *item ;
 423   GtkTreeSelection* selection =
 424     gtk_tree_view_get_selection ( GTK_TREE_VIEW (selector->source));
 425
 426   GList *selected_rows =
 427     gtk_tree_selection_get_selected_rows (selection, NULL);
 428
 429   GtkTreeModel *childmodel  = gtk_tree_model_filter_get_model
 430     (selector->filtered_source);
 431
 432   g_return_if_fail (selector->select_items);
 433
 434   selector->selecting = TRUE;
 435
 436   for (item = g_list_first (selected_rows);
 437        item != NULL;
 438        item = g_list_next (item))
 439     {
 440       GtkTreeIter child_iter;
 441       GtkTreeIter iter;
 442       GtkTreePath *path  = item->data;
 443
 444       gtk_tree_model_get_iter (GTK_TREE_MODEL (selector->filtered_source),
 445                                &iter, path);
 446
 447       gtk_tree_model_filter_convert_iter_to_child_iter
 448         (selector->filtered_source,
 449          &child_iter,
 450          &iter);
 451
 452       selector->select_items (child_iter,
 453                               selector->dest,
 454                               childmodel);
 455     }
 456
 457   g_list_foreach (selected_rows, (GFunc) gtk_tree_path_free, NULL);
 458   g_list_free (selected_rows);
 459
 460   gtk_tree_model_filter_refilter (selector->filtered_source);
 461
 462   g_signal_emit (selector, signals [SELECTED], 0);
 463
 464   selector->selecting = FALSE;
 465 }
 466
 467 /* Callback for when the source treeview is activated (double clicked) */
 468 static void
 469 on_row_activate (GtkTreeView       *tree_view,
 470                  GtkTreePath       *path,
 471                  GtkTreeViewColumn *column,
 472                  gpointer           data)
 473 {
 474   PsppireSelector *selector  = data;
 475
 476   select_selection (selector);
 477 }
 478
 479 /* Callback for when the selector button is clicked */
 480 static void
 481 on_click (PsppireSelector *selector, gpointer data)
 482 {
 483   switch (selector->direction)
 484     {
 485     case PSPPIRE_SELECTOR_SOURCE_TO_DEST:
 486       select_selection (selector);
 487       break;
 488     case PSPPIRE_SELECTOR_DEST_TO_SOURCE:
 489       de_select_selection (selector);
 490       break;
 491     default:
 492       g_assert_not_reached ();
 493       break;
 494     }
 495 }
 496
 497 /* Default visibility filter for GtkTreeView DEST widget */
 498 static gboolean
 499 is_item_in_dest (GtkTreeModel *model, GtkTreeIter *iter,
 500                  PsppireSelector *selector)
 501 {
 502   GtkTreeModel *dest_model;
 503   GtkTreeIter dest_iter;
 504   GtkTreeIter source_iter;
 505   gint index;
 506   GtkTreePath *path ;
 507   GtkTreeModel *source_model;
 508
 509   if ( GTK_IS_TREE_MODEL_FILTER (model) )
 510     {
 511       source_model = gtk_tree_model_filter_get_model
 512         (GTK_TREE_MODEL_FILTER (model));
 513
 514       gtk_tree_model_filter_convert_iter_to_child_iter
 515         ( GTK_TREE_MODEL_FILTER (model),  &source_iter,  iter  );
 516     }
 517   else
 518     {
 519       source_model = model;
 520       source_iter = *iter;
 521     }
 522
 523   dest_model = gtk_tree_view_get_model (GTK_TREE_VIEW (selector->dest));
 524
 525   path = gtk_tree_model_get_path (source_model, &source_iter);
 526
 527   index = *gtk_tree_path_get_indices (path);
 528
 529   gtk_tree_path_free (path);
 530
 531   if ( ! gtk_tree_model_get_iter_first (dest_model, &dest_iter) )
 532     return FALSE;
 533
 534   do
 535     {
 536       GValue value = {0};
 537       gtk_tree_model_get_value (dest_model, &dest_iter, 0, &value);
 538
 539       if ( g_value_get_int (&value) == index)
 540         return TRUE;
 541     }
 542   while (gtk_tree_model_iter_next (dest_model, &dest_iter));
 543
 544   return FALSE;
 545 }
 546
 547 /* Visibility function for items in the SOURCE widget.
 548    Returns TRUE iff *all* the selectors for which SOURCE is associated
 549    are visible */
 550 static gboolean
 551 is_source_item_visible (GtkTreeModel *childmodel,
 552                         GtkTreeIter *iter, gpointer data)
 553 {
 554   PsppireSelector *selector = data;
 555   PsppireSelectorClass *class = g_type_class_peek (PSPPIRE_SELECTOR_TYPE);
 556
 557   GList *list = NULL;
 558
 559   list = g_hash_table_lookup (class->source_hash, selector->source);
 560
 561   while (list)
 562     {
 563       PsppireSelector *selector = list->data;
 564
 565       if ( selector->filter && selector->filter (childmodel, iter, selector))
 566         return FALSE;
 567
 568       list = list->next;
 569     }
 570
 571
 572   return TRUE;
 573 }
 574
 575 /* set the source widget to SOURCE */
 576 static void
 577 set_tree_view_source (PsppireSelector *selector,
 578                       GtkTreeView *source)
 579 {
 580   GtkTreeSelection* selection ;
 581   GList *list = NULL;
 582
 583   PsppireSelectorClass *class = g_type_class_peek (PSPPIRE_SELECTOR_TYPE);
 584
 585   if ( ! (list = g_hash_table_lookup (class->source_hash, source)))
 586     {
 587       selector->filtered_source =
 588         GTK_TREE_MODEL_FILTER (gtk_tree_model_filter_new
 589                                (gtk_tree_view_get_model (source),  NULL));
 590
 591       gtk_tree_view_set_model (source, NULL);
 592
 593       gtk_tree_view_set_model (source,
 594                                GTK_TREE_MODEL (selector->filtered_source));
 595
 596       list = g_list_append (list, selector);
 597       g_hash_table_insert (class->source_hash, source, list);
 598
 599
 600       gtk_tree_model_filter_set_visible_func (selector->filtered_source,
 601                                               is_source_item_visible,
 602                                               selector,
 603                                               NULL);
 604     }
 605   else
 606     {  /* Append this selector to the list and push the <source,list>
 607           pair onto the hash table */
 608
 609       selector->filtered_source = GTK_TREE_MODEL_FILTER (
 610         gtk_tree_view_get_model (source));
 611
 612       list = g_list_append (list, selector);
 613       g_hash_table_replace (class->source_hash, source, list);
 614     }
 615
 616   selection = gtk_tree_view_get_selection (source);
 617
 618   g_signal_connect (source, "row-activated", G_CALLBACK (on_row_activate),
 619                     selector);
 620
 621   g_signal_connect (selection, "changed", G_CALLBACK (on_source_select),
 622                     selector);
 623 }
 624
 625
 626 /*
 627    Callback for when the destination treeview's data changes
 628  */
 629 static void
 630 on_dest_data_change (GtkTreeModel *tree_model,
 631                      GtkTreePath  *path,
 632                      GtkTreeIter  *iter,
 633                      gpointer      user_data)
 634 {
 635   PsppireSelector *selector = user_data;
 636
 637   if ( selector->selecting) return;
 638
 639   gtk_tree_model_filter_refilter (selector->filtered_source);
 640 }
 641
 642
 643 static void
 644 on_dest_data_delete (GtkTreeModel *tree_model,
 645                      GtkTreePath  *path,
 646                      gpointer      user_data)
 647 {
 648   PsppireSelector *selector = user_data;
 649
 650   if ( selector->selecting ) return;
 651
 652   gtk_tree_model_filter_refilter (selector->filtered_source);
 653 }
 654
 655
 656
 657
 658 /* Set the destination widget to DEST */
 659 static void
 660 set_tree_view_dest (PsppireSelector *selector,
 661                     GtkTreeView *dest)
 662 {
 663   GtkTreeSelection* selection = gtk_tree_view_get_selection (dest);
 664   GtkTreeModel *model = gtk_tree_view_get_model (dest);
 665
 666   gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
 667
 668   g_signal_connect (selection, "changed", G_CALLBACK (on_dest_treeview_select),
 669                     selector);
 670
 671   g_signal_connect (model, "row-changed", G_CALLBACK (on_dest_data_change),
 672                       selector);
 673
 674   g_signal_connect (model, "row-deleted", G_CALLBACK (on_dest_data_delete),
 675                       selector);
 676
 677 }
 678
 679 /* Callback for when the DEST GtkEntry is activated (Enter is pressed) */
 680 static void
 681 on_entry_activate (GtkEntry *w, gpointer data)
 682 {
 683   PsppireSelector * selector = data;
 684
 685   gtk_tree_model_filter_refilter (selector->filtered_source);
 686 }
 687
 688 /* Callback for when the DEST GtkEntry is selected (clicked) */
 689 static gboolean
 690 on_entry_dest_select (GtkWidget *widget, GdkEventFocus *event, gpointer data)
 691 {
 692   PsppireSelector * selector = data;
 693
 694   set_direction (selector, PSPPIRE_SELECTOR_DEST_TO_SOURCE);
 695
 696   return FALSE;
 697 }
 698
 699 /* Set DEST to be the destination GtkEntry widget */
 700 static void
 701 set_entry_dest (PsppireSelector *selector,
 702                 GtkEntry *dest)
 703 {
 704   g_signal_connect (dest, "activate", G_CALLBACK (on_entry_activate),
 705                     selector);
 706
 707   g_signal_connect (dest, "focus-in-event", G_CALLBACK (on_entry_dest_select),
 708                     selector);
 709 }
 710
 711
 712 /* Set SOURCE and DEST for this selector, and
 713    set SELECT_FUNC and FILTER_FUNC */
 714 void
 715 psppire_selector_set_subjects (PsppireSelector *selector,
 716                                GtkWidget *source,
 717                                GtkWidget *dest,
 718                                SelectItemsFunc *select_func,
 719                                FilterItemsFunc *filter_func )
 720 {
 721   g_assert(selector);
 722
 723   selector->filter = filter_func ;
 724
 725   selector->source = source;
 726   selector->dest = dest;
 727
 728   if ( filter_func == NULL)
 729     {
 730       if  (GTK_IS_TREE_VIEW (dest))
 731         selector->filter = is_item_in_dest;
 732     }
 733
 734   g_signal_connect (selector, "clicked", G_CALLBACK (on_click), NULL);
 735
 736   if ( GTK_IS_TREE_VIEW (source))
 737     set_tree_view_source (selector, GTK_TREE_VIEW (source) );
 738   else
 739     g_error ("Unsupported source widget: %s", G_OBJECT_TYPE_NAME (source));
 740
 741   g_assert ( GTK_IS_TREE_MODEL_FILTER (selector->filtered_source));
 742
 743   if  ( GTK_IS_TREE_VIEW (dest))
 744     set_tree_view_dest (selector, GTK_TREE_VIEW (dest));
 745
 746   else if ( GTK_IS_ENTRY (dest))
 747     set_entry_dest (selector, GTK_ENTRY (dest));
 748
 749   else if (GTK_IS_TEXT_VIEW (dest))
 750     {
 751       /* Nothing to be done */
 752     }
 753
 754   else
 755     g_error ("Unsupported destination widget: %s", G_OBJECT_TYPE_NAME (dest));
 756
 757   selector->select_items = select_func;
 758 }
 759
 760
 761
 762 GType
 763 psppire_selector_orientation_get_type (void)
 764 {
 765   static GType etype = 0;
 766   if (etype == 0) {
 767     static const GEnumValue values[] = {
 768       { PSPPIRE_SELECT_SOURCE_BEFORE_DEST, "PSPPIRE_SELECT_SOURCE_BEFORE_DEST", "source before destination" },
 769       { PSPPIRE_SELECT_SOURCE_AFTER_DEST, "PSPPIRE_SELECT_SOURCE_AFTER_DEST", "source after destination" },
 770       { PSPPIRE_SELECT_SOURCE_ABOVE_DEST, "PSPPIRE_SELECT_SOURCE_ABOVE_DEST", "source above destination" },
 771       { PSPPIRE_SELECT_SOURCE_BELOW_DEST, "PSPPIRE_SELECT_SOURCE_BELOW_DEST", "source below destination" },
 772       { 0, NULL, NULL }
 773     };
 774     etype = g_enum_register_static (g_intern_static_string ("PsppireSelectorOrientation"), values);
 775   }
 776   return etype;
 777 }