+
+void
+pspp_sheet_selection_unselect_all_columns (PsppSheetSelection *selection)
+{
+ PsppSheetView *sheet_view = selection->tree_view;
+ gboolean changed;
+ GList *list;
+
+ changed = FALSE;
+ for (list = sheet_view->priv->columns; list; list = list->next)
+ {
+ PsppSheetViewColumn *column = list->data;
+ if (column->selected)
+ {
+ column->selected = FALSE;
+ changed = TRUE;
+ }
+ }
+ if (changed && selection->type == PSPP_SHEET_SELECTION_RECTANGLE)
+ {
+ gtk_widget_queue_draw (GTK_WIDGET (selection->tree_view));
+ _pspp_sheet_selection_emit_changed (selection);
+ }
+}
+
+GList *
+pspp_sheet_selection_get_selected_columns (PsppSheetSelection *selection)
+{
+ PsppSheetView *sheet_view = selection->tree_view;
+ GList *selected_columns = NULL;
+ GList *iter;
+
+ g_return_val_if_fail (PSPP_IS_SHEET_SELECTION (selection), NULL);
+ g_return_val_if_fail (selection->tree_view != NULL, NULL);
+
+ if (selection->type != PSPP_SHEET_SELECTION_RECTANGLE)
+ return NULL;
+
+ for (iter = sheet_view->priv->columns; iter; iter = iter->next)
+ {
+ PsppSheetViewColumn *column = iter->data;
+ if (column->selected)
+ selected_columns = g_list_prepend (selected_columns, column);
+ }
+ return g_list_reverse (selected_columns);
+}
+
+gint
+pspp_sheet_selection_count_selected_columns (PsppSheetSelection *selection)
+{
+ PsppSheetView *sheet_view = selection->tree_view;
+ GList *list;
+ gint n;
+
+ n = 0;
+ for (list = sheet_view->priv->columns; list; list = list->next)
+ {
+ PsppSheetViewColumn *column = list->data;
+ if (column->selected)
+ n++;
+ }
+ return n;
+}
+
+void
+pspp_sheet_selection_select_all_columns (PsppSheetSelection *selection)
+{
+ PsppSheetView *sheet_view = selection->tree_view;
+ gboolean changed;
+ GList *list;
+
+ changed = FALSE;
+ for (list = sheet_view->priv->columns; list; list = list->next)
+ {
+ PsppSheetViewColumn *column = list->data;
+ if (!column->selected && column->selectable)
+ {
+ /* XXX should use pspp_sheet_view_column_set_selected() here (and
+ elsewhere) but we want to call
+ _pspp_sheet_selection_emit_changed() only once for all the
+ columns. */
+ column->selected = TRUE;
+ changed = TRUE;
+ }
+ }
+ if (changed && selection->type == PSPP_SHEET_SELECTION_RECTANGLE)
+ {
+ _pspp_sheet_selection_emit_changed (selection);
+ gtk_widget_queue_draw (GTK_WIDGET (selection->tree_view));
+ }
+}
+
+void
+pspp_sheet_selection_select_column (PsppSheetSelection *selection,
+ PsppSheetViewColumn *column)
+{
+ if (!column->selected && column->selectable)
+ {
+ column->selected = TRUE;
+ if (selection->type == PSPP_SHEET_SELECTION_RECTANGLE)
+ {
+ _pspp_sheet_selection_emit_changed (selection);
+ gtk_widget_queue_draw (GTK_WIDGET (selection->tree_view));
+ }
+ }
+}
+
+void
+pspp_sheet_selection_select_column_range (PsppSheetSelection *selection,
+ PsppSheetViewColumn *first,
+ PsppSheetViewColumn *last)
+{
+ PsppSheetView *sheet_view = selection->tree_view;
+ gboolean in_range;
+ gboolean changed;
+ GList *list;
+
+ in_range = FALSE;
+ changed = FALSE;
+ for (list = sheet_view->priv->columns; list; list = list->next)
+ {
+ PsppSheetViewColumn *column = list->data;
+ gboolean c0 = column == first;
+ gboolean c1 = column == last;
+
+ if (in_range || c0 || c1)
+ {
+ if (!column->selected && column->selectable)
+ {
+ column->selected = TRUE;
+ changed = TRUE;
+ }
+ }
+
+ in_range = in_range ^ c0 ^ c1;
+ }
+ if (changed && selection->type == PSPP_SHEET_SELECTION_RECTANGLE)
+ {
+ _pspp_sheet_selection_emit_changed (selection);
+ gtk_widget_queue_draw (GTK_WIDGET (selection->tree_view));
+ }
+}