--- /dev/null
+/*
+ PSPPIRE --- A Graphical User Interface for PSPP
+ Copyright (C) 2007 Free Software Foundation
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+/*
+ This module provides a widget, PsppireSelector derived from
+ GtkButton.
+
+ It contains a GtkArrow, and is used for selecting objects from a
+ GtkTreeView and putting them into a destination widget (often
+ another GtkTreeView). Typically this is used in psppire for
+ selecting variables, thus:
+
+
+ +----------------------------------------------------------+
+ | |
+ | Source Widget Dest Widget |
+ | +----------------+ +----------------+ |
+ | | Variable0 | | Variable2 | |
+ | | Variable1 | | | |
+ | | Variable3 | | | |
+ | | | Selector | | |
+ | | | | | |
+ | | | +------+ | | |
+ | | | | |\ | | | |
+ | | | | | \ | | | |
+ | | | | | / | | | |
+ | | | | |/ | | | |
+ | | | +------+ | | |
+ | | | | | |
+ | | | | | |
+ | | | | | |
+ | | | | | |
+ | +----------------+ +----------------+ |
+ | |
+ +----------------------------------------------------------+
+
+ The Source Widget is always a GtkTreeView. The Dest Widget may be a
+ GtkTreeView or a GtkEntry (other destination widgets may be
+ supported in the future).
+
+ Widgets may be source to more than one PsppireSelector.
+*/
+
+
+#include <config.h>
+
+#include <gtk/gtksignal.h>
+#include <gtk/gtkbutton.h>
+
+#include "psppire-selector.h"
+
+#include <gtk/gtktreeview.h>
+#include <gtk/gtktreeselection.h>
+#include <gtk/gtkwidget.h>
+
+static void psppire_selector_base_finalize (PsppireSelectorClass *, gpointer);
+static void psppire_selector_base_init (PsppireSelectorClass *class);
+static void psppire_selector_class_init (PsppireSelectorClass *class);
+static void psppire_selector_init (PsppireSelector *selector);
+
+enum {SELECTED, /* Emitted when an item is inserted into dest */
+ DE_SELECTED, /* Emitted when an item is removed from dest */
+ n_SIGNALS};
+
+static guint signals [n_SIGNALS];
+
+
+GType
+psppire_selector_get_type (void)
+{
+ static GType psppire_selector_type = 0;
+
+ if (!psppire_selector_type)
+ {
+ static const GTypeInfo psppire_selector_info =
+ {
+ sizeof (PsppireSelectorClass),
+ (GBaseInitFunc) psppire_selector_base_init,
+ (GBaseFinalizeFunc) psppire_selector_base_finalize,
+ (GClassInitFunc)psppire_selector_class_init,
+ (GClassFinalizeFunc) NULL,
+ NULL,
+ sizeof (PsppireSelector),
+ 0,
+ (GInstanceInitFunc) psppire_selector_init,
+ };
+
+ psppire_selector_type =
+ g_type_register_static (GTK_TYPE_BUTTON, "PsppireSelector",
+ &psppire_selector_info, 0);
+ }
+
+ return psppire_selector_type;
+}
+
+
+static void
+psppire_selector_finalize (GObject *object)
+{
+}
+
+
+
+static void
+psppire_selector_class_init (PsppireSelectorClass *class)
+{
+ signals [SELECTED] =
+ g_signal_new ("selected",
+ G_TYPE_FROM_CLASS (class),
+ G_SIGNAL_RUN_FIRST,
+ 0,
+ NULL, NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
+
+ signals [DE_SELECTED] =
+ g_signal_new ("de-selected",
+ G_TYPE_FROM_CLASS (class),
+ G_SIGNAL_RUN_FIRST,
+ 0,
+ NULL, NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
+
+
+}
+
+
+static void
+psppire_selector_base_init (PsppireSelectorClass *class)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+ object_class->finalize = psppire_selector_finalize;
+
+ class->source_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
+}
+
+
+
+static void
+psppire_selector_base_finalize(PsppireSelectorClass *class,
+ gpointer class_data)
+{
+ g_hash_table_destroy (class->source_hash);
+}
+
+
+static void
+psppire_selector_init (PsppireSelector *selector)
+{
+ selector->arrow = gtk_arrow_new (GTK_ARROW_LEFT, GTK_SHADOW_NONE);
+ selector->filtered_source = NULL;
+
+ gtk_container_add (GTK_CONTAINER (selector), selector->arrow);
+
+ gtk_widget_show (selector->arrow);
+
+ /* FIXME: This shouldn't be necessary, but Glade interfaces seem to
+ need it. */
+ gtk_widget_show (GTK_WIDGET (selector));
+}
+
+
+GtkWidget*
+psppire_selector_new (void)
+{
+ return GTK_WIDGET (g_object_new (psppire_selector_get_type (), NULL));
+}
+
+
+static void
+set_direction (PsppireSelector *selector, enum psppire_selector_dir d)
+{
+ selector->direction = d;
+
+ /* FIXME: Need to reverse the arrow direction if an RTL locale is in
+ effect */
+ if ( d == PSPPIRE_SELECTOR_SOURCE_TO_DEST )
+ g_object_set (selector->arrow, "arrow-type", GTK_ARROW_RIGHT, NULL);
+ else
+ g_object_set (selector->arrow, "arrow-type", GTK_ARROW_LEFT, NULL);
+}
+
+/* Callback for when the source selection changes */
+static void
+on_source_select (GtkTreeSelection *treeselection, gpointer data)
+{
+ PsppireSelector *selector = data;
+
+ set_direction (selector, PSPPIRE_SELECTOR_SOURCE_TO_DEST);
+
+ if ( GTK_IS_ENTRY (selector->dest) )
+ {
+ gtk_widget_set_sensitive (GTK_WIDGET (selector),
+ gtk_tree_selection_count_selected_rows
+ (treeselection) <= 1 );
+ }
+}
+
+/* Callback for when the destination treeview selection changes */
+static void
+on_dest_treeview_select (GtkTreeSelection *treeselection, gpointer data)
+{
+ PsppireSelector *selector = data;
+
+ set_direction (selector, PSPPIRE_SELECTOR_DEST_TO_SOURCE);
+}
+
+/* Callback for source deselection, when the dest is GtkEntry */
+static void
+de_select_selection_entry (PsppireSelector *selector)
+{
+ gtk_entry_set_text (GTK_ENTRY (selector->dest), "");
+}
+
+/* Callback for source deselection, when the dest is GtkTreeView */
+static void
+de_select_selection_tree_view (PsppireSelector *selector)
+{
+ GList *item;
+
+ GtkTreeSelection* selection =
+ gtk_tree_view_get_selection ( GTK_TREE_VIEW (selector->dest));
+
+ GtkTreeModel *model =
+ gtk_tree_view_get_model (GTK_TREE_VIEW (selector->dest));
+
+ GList *selected_rows =
+ gtk_tree_selection_get_selected_rows (selection, NULL);
+
+ g_return_if_fail (selector->select_items);
+
+ /* Convert paths to RowRefs */
+ for (item = g_list_first (selected_rows);
+ item != NULL;
+ item = g_list_next (item))
+ {
+ GtkTreeRowReference* rowref;
+ GtkTreePath *path = item->data;
+
+ rowref = gtk_tree_row_reference_new (GTK_TREE_MODEL (model), path);
+
+ item->data = rowref ;
+ gtk_tree_path_free (path);
+ }
+
+ /* Remove each selected row from the dest widget */
+ for (item = g_list_first (selected_rows);
+ item != NULL;
+ item = g_list_next (item))
+ {
+ GtkTreeIter iter;
+ GtkTreeRowReference *rr = item->data;
+
+ GtkTreePath *path = gtk_tree_row_reference_get_path (rr);
+
+ gtk_tree_model_get_iter (GTK_TREE_MODEL (model), &iter, path);
+
+ gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
+
+ gtk_tree_path_free (path);
+ }
+
+ /* Delete list of RowRefs and its contents */
+ g_list_foreach (selected_rows, (GFunc) gtk_tree_row_reference_free, NULL);
+ g_list_free (selected_rows);
+}
+
+
+/* Removes something from the DEST widget */
+static void
+de_select_selection (PsppireSelector *selector)
+{
+ if ( GTK_IS_TREE_VIEW (selector->dest ) )
+ de_select_selection_tree_view (selector);
+
+ else if ( GTK_IS_ENTRY (selector->dest))
+ de_select_selection_entry (selector);
+
+ else
+ g_assert_not_reached ();
+
+ gtk_tree_model_filter_refilter (selector->filtered_source);
+
+ g_signal_emit (selector, signals [DE_SELECTED], 0);
+}
+
+
+/* Puts something into the DEST widget */
+static void
+select_selection (PsppireSelector *selector)
+{
+ GList *item ;
+ GtkTreeSelection* selection =
+ gtk_tree_view_get_selection ( GTK_TREE_VIEW (selector->source));
+
+ GList *selected_rows =
+ gtk_tree_selection_get_selected_rows (selection, NULL);
+
+ GtkTreeModel *childmodel = gtk_tree_model_filter_get_model
+ (selector->filtered_source);
+
+ g_return_if_fail (selector->select_items);
+
+
+ for (item = g_list_first (selected_rows);
+ item != NULL;
+ item = g_list_next (item))
+ {
+ GtkTreeIter child_iter;
+ GtkTreeIter iter;
+ GtkTreePath *path = item->data;
+
+ gtk_tree_model_get_iter (GTK_TREE_MODEL (selector->filtered_source),
+ &iter, path);
+
+ gtk_tree_model_filter_convert_iter_to_child_iter
+ (selector->filtered_source,
+ &child_iter,
+ &iter);
+
+ selector->select_items (child_iter,
+ selector->dest,
+ childmodel);
+ }
+
+ g_list_foreach (selected_rows, (GFunc) gtk_tree_path_free, NULL);
+ g_list_free (selected_rows);
+
+ gtk_tree_model_filter_refilter (selector->filtered_source);
+
+ g_signal_emit (selector, signals [SELECTED], 0);
+}
+
+/* Callback fro then the source treeview is activated (double clicked) */
+static void
+on_row_activate (GtkTreeView *tree_view,
+ GtkTreePath *path,
+ GtkTreeViewColumn *column,
+ gpointer data)
+{
+ PsppireSelector *selector = data;
+
+ select_selection (selector);
+}
+
+/* Callback for when the selector button is clicked */
+static void
+on_click (PsppireSelector *selector, gpointer data)
+{
+ switch (selector->direction)
+ {
+ case PSPPIRE_SELECTOR_SOURCE_TO_DEST:
+ select_selection (selector);
+ break;
+ case PSPPIRE_SELECTOR_DEST_TO_SOURCE:
+ de_select_selection (selector);
+ break;
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+}
+
+/* Default visibility filter for GtkTreeView DEST widget */
+static gboolean
+is_item_in_dest (GtkTreeModel *model, GtkTreeIter *iter,
+ PsppireSelector *selector)
+{
+ GtkTreeModel *dest_model;
+ GtkTreeIter dest_iter;
+ GtkTreeIter source_iter;
+ gint index;
+ GtkTreePath *path ;
+ GtkTreeModel *source_model;
+
+ if ( GTK_IS_TREE_MODEL_FILTER (model) )
+ {
+ source_model = gtk_tree_model_filter_get_model
+ (GTK_TREE_MODEL_FILTER (model));
+
+ gtk_tree_model_filter_convert_iter_to_child_iter
+ ( GTK_TREE_MODEL_FILTER (model), &source_iter, iter );
+ }
+ else
+ {
+ source_model = model;
+ source_iter = *iter;
+ }
+
+ dest_model = gtk_tree_view_get_model (GTK_TREE_VIEW (selector->dest));
+
+ path = gtk_tree_model_get_path (source_model, &source_iter);
+
+ index = *gtk_tree_path_get_indices (path);
+
+ gtk_tree_path_free (path);
+
+ if ( ! gtk_tree_model_get_iter_first (dest_model, &dest_iter) )
+ return FALSE;
+
+ do
+ {
+ GValue value = {0};
+ gtk_tree_model_get_value (dest_model, &dest_iter, 0, &value);
+
+ if ( g_value_get_int (&value) == index)
+ return TRUE;
+ }
+ while (gtk_tree_model_iter_next (dest_model, &dest_iter));
+
+ return FALSE;
+}
+
+/* Visibility function for items in the SOURCE widget.
+ Returns TRUE iff *all* the selectors for which SOURCE is associated
+ are visible */
+static gboolean
+is_source_item_visible (GtkTreeModel *childmodel,
+ GtkTreeIter *iter, gpointer data)
+{
+ PsppireSelector *selector = data;
+ PsppireSelectorClass *class = g_type_class_peek (PSPPIRE_SELECTOR_TYPE);
+
+ GList *list = NULL;
+
+ list = g_hash_table_lookup (class->source_hash, selector->source);
+
+ while (list)
+ {
+ PsppireSelector *selector = list->data;
+
+ if ( selector->filter (childmodel, iter, selector))
+ return FALSE;
+
+ list = list->next;
+ }
+
+
+ return TRUE;
+}
+
+/* set the source widget to SOURCE */
+static void
+set_tree_view_source (PsppireSelector *selector,
+ GtkTreeView *source)
+{
+ GtkTreeSelection* selection ;
+ GList *list = NULL;
+
+ PsppireSelectorClass *class = g_type_class_peek (PSPPIRE_SELECTOR_TYPE);
+
+ if ( ! (list = g_hash_table_lookup (class->source_hash, source)))
+ {
+ selector->filtered_source =
+ GTK_TREE_MODEL_FILTER (gtk_tree_model_filter_new
+ (gtk_tree_view_get_model (source), NULL));
+
+ gtk_tree_view_set_model (source, NULL);
+
+ gtk_tree_view_set_model (source,
+ GTK_TREE_MODEL (selector->filtered_source));
+
+ list = g_list_append (list, selector);
+ g_hash_table_insert (class->source_hash, source, list);
+
+
+ gtk_tree_model_filter_set_visible_func (selector->filtered_source,
+ is_source_item_visible,
+ selector,
+ NULL);
+ }
+ else
+ { /* Append this selector to the list and push the <source,list>
+ pair onto the hash table */
+
+ selector->filtered_source = GTK_TREE_MODEL_FILTER (
+ gtk_tree_view_get_model (source));
+
+ list = g_list_append (list, selector);
+ g_hash_table_replace (class->source_hash, source, list);
+ }
+
+ selection = gtk_tree_view_get_selection (source);
+
+ g_signal_connect (source, "row-activated", G_CALLBACK (on_row_activate),
+ selector);
+
+ g_signal_connect (selection, "changed", G_CALLBACK (on_source_select),
+ selector);
+}
+
+
+/* Set the destination widget to DEST */
+static void
+set_tree_view_dest (PsppireSelector *selector,
+ GtkTreeView *dest)
+{
+ GtkTreeSelection* selection = gtk_tree_view_get_selection (dest);
+
+ gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
+
+ g_signal_connect (selection, "changed", G_CALLBACK (on_dest_treeview_select),
+ selector);
+}
+
+/* Callback for when the DEST GtkEntry is activated (Enter is pressed) */
+static void
+on_entry_activate (GtkEntry *w, gpointer data)
+{
+ PsppireSelector * selector = data;
+
+ gtk_tree_model_filter_refilter (selector->filtered_source);
+}
+
+/* Callback for when the DEST GtkEntry is selected (clicked) */
+static gboolean
+on_entry_dest_select (GtkWidget *widget, GdkEventFocus *event, gpointer data)
+{
+ PsppireSelector * selector = data;
+
+ set_direction (selector, PSPPIRE_SELECTOR_DEST_TO_SOURCE);
+
+ return FALSE;
+}
+
+/* Set DEST to be the destination GtkEntry widget */
+static void
+set_entry_dest (PsppireSelector *selector,
+ GtkEntry *dest)
+{
+ g_signal_connect (dest, "activate", G_CALLBACK (on_entry_activate),
+ selector);
+
+ g_signal_connect (dest, "focus-in-event", G_CALLBACK (on_entry_dest_select),
+ selector);
+}
+
+
+/* Set SOURCE and DEST for this selector, and
+ set SELECT_FUNC and FILTER_FUNC */
+void
+psppire_selector_set_subjects (PsppireSelector *selector,
+ GtkWidget *source,
+ GtkWidget *dest,
+ SelectItemsFunc *select_func,
+ FilterItemsFunc *filter_func )
+{
+ selector->filter = filter_func ;
+
+ selector->source = source;
+ selector->dest = dest;
+
+ if ( filter_func == NULL)
+ {
+ if (GTK_IS_TREE_VIEW (dest))
+ selector->filter = is_item_in_dest;
+ }
+
+ g_signal_connect (selector, "clicked", G_CALLBACK (on_click), NULL);
+
+ if ( GTK_IS_TREE_VIEW (source))
+ set_tree_view_source (selector, GTK_TREE_VIEW (source) );
+ else
+ g_error ("Unsupported source widget: %s", G_OBJECT_TYPE_NAME (source));
+
+ g_assert ( GTK_IS_TREE_MODEL_FILTER (selector->filtered_source));
+
+ if ( GTK_IS_TREE_VIEW (dest))
+ set_tree_view_dest (selector, GTK_TREE_VIEW (dest));
+
+ else if ( GTK_IS_ENTRY (dest))
+ set_entry_dest (selector, GTK_ENTRY (dest));
+
+ else
+ g_error ("Unsupported destination widget: %s", G_OBJECT_TYPE_NAME (dest));
+
+ selector->select_items = select_func;
+}
projects / pspp-builds.git / blobdiff