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-rw-r--r--widgets/table/gal-a11y-e-cell-tree.c260
1 files changed, 260 insertions, 0 deletions
diff --git a/widgets/table/gal-a11y-e-cell-tree.c b/widgets/table/gal-a11y-e-cell-tree.c
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+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ *
+ * Authors:
+ * Tim Wo <tim.wo@sun.com>
+ *
+ * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
+ *
+ */
+
+#include <config.h>
+
+#include <atk/atk.h>
+
+#include "a11y/gal-a11y-util.h"
+#include "table/e-cell-tree.h"
+#include "table/e-table.h"
+#include "table/e-tree-table-adapter.h"
+#include <glib/gi18n.h>
+
+#include "gal-a11y-e-cell-tree.h"
+#include "gal-a11y-e-cell-registry.h"
+
+#define CS_CLASS(a11y) (G_TYPE_INSTANCE_GET_CLASS ((a11y), C_TYPE_STREAM, GalA11yECellTreeClass))
+static AtkObjectClass *a11y_parent_class;
+#define A11Y_PARENT_TYPE (gal_a11y_e_cell_get_type ())
+
+#define d(x)
+
+static void
+ectr_model_row_changed_cb (ETableModel *etm,
+ gint row,
+ GalA11yECell *a11y)
+{
+ ETreePath node;
+ ETreeModel *tree_model;
+ ETreeTableAdapter *tree_table_adapter;
+
+ g_return_if_fail (a11y);
+ if (a11y->row != row)
+ return;
+
+ node = e_table_model_value_at (etm, -1, a11y->row);
+ tree_model = e_table_model_value_at (etm, -2, a11y->row);
+ tree_table_adapter = e_table_model_value_at (etm, -3, a11y->row);
+
+ if (e_tree_model_node_is_expandable (tree_model, node)) {
+ gboolean is_exp = e_tree_table_adapter_node_is_expanded (tree_table_adapter, node);
+ if (is_exp)
+ gal_a11y_e_cell_add_state (a11y, ATK_STATE_EXPANDED, TRUE);
+ else
+ gal_a11y_e_cell_remove_state (a11y, ATK_STATE_EXPANDED, TRUE);
+ }
+}
+
+static void
+kill_view_cb(ECellView *subcell_view,
+ gpointer psubcell_a11ies)
+{
+ GList *node;
+ GList *subcell_a11ies = (GList *) psubcell_a11ies;
+ GalA11yECell *subcell;
+
+ for (node = subcell_a11ies; node != NULL; node = g_list_next (node))
+ {
+ subcell = GAL_A11Y_E_CELL(node->data);
+ if (subcell && subcell->cell_view == subcell_view)
+ {
+ d(fprintf(stderr, "subcell_view %p deleted before the a11y object %p\n", subcell_view, subcell));
+ subcell->cell_view = NULL;
+ }
+ }
+}
+
+static void
+ectr_subcell_weak_ref (GalA11yECellTree *a11y,
+ GalA11yECell *subcell_a11y)
+{
+ ECellView *subcell_view = subcell_a11y ? subcell_a11y->cell_view : NULL;
+ if (subcell_a11y && subcell_view && subcell_view->kill_view_cb_data)
+ subcell_view->kill_view_cb_data = g_list_remove(subcell_view->kill_view_cb_data, subcell_a11y);
+
+ g_signal_handler_disconnect (GAL_A11Y_E_CELL (a11y)->item->table_model,
+ a11y->model_row_changed_id);
+ g_object_unref (a11y);
+}
+
+static void
+ectr_do_action_expand (AtkAction *action)
+{
+ GalA11yECell *a11y;
+ ETableModel *table_model;
+ ETreePath node;
+ ETreeModel *tree_model;
+ ETreeTableAdapter *tree_table_adapter;
+
+ a11y = GAL_A11Y_E_CELL (action);
+ table_model = a11y->item->table_model;
+ node = e_table_model_value_at (table_model, -1, a11y->row);
+ tree_model = e_table_model_value_at (table_model, -2, a11y->row);
+ tree_table_adapter = e_table_model_value_at (table_model, -3, a11y->row);
+
+ if (e_tree_model_node_is_expandable (tree_model, node)) {
+ e_tree_table_adapter_node_set_expanded (tree_table_adapter,
+ node,
+ TRUE);
+ gal_a11y_e_cell_add_state (a11y, ATK_STATE_EXPANDED, TRUE);
+ }
+}
+
+static void
+ectr_do_action_collapse (AtkAction *action)
+{
+ GalA11yECell *a11y;
+ ETableModel *table_model;
+ ETreePath node;
+ ETreeModel *tree_model;
+ ETreeTableAdapter *tree_table_adapter;
+
+ a11y = GAL_A11Y_E_CELL (action);
+ table_model = a11y->item->table_model;
+ node = e_table_model_value_at (table_model, -1, a11y->row);
+ tree_model = e_table_model_value_at (table_model, -2, a11y->row);
+ tree_table_adapter = e_table_model_value_at (table_model, -3, a11y->row);
+
+ if (e_tree_model_node_is_expandable (tree_model, node)) {
+ e_tree_table_adapter_node_set_expanded (tree_table_adapter,
+ node,
+ FALSE);
+ gal_a11y_e_cell_remove_state (a11y, ATK_STATE_EXPANDED, TRUE);
+ }
+}
+
+static void
+ectr_class_init (GalA11yECellTreeClass *klass)
+{
+ a11y_parent_class = g_type_class_ref (A11Y_PARENT_TYPE);
+}
+
+static void
+ectr_init (GalA11yECellTree *a11y)
+{
+}
+
+GType
+gal_a11y_e_cell_tree_get_type (void)
+{
+ static GType type = 0;
+
+ if (!type) {
+ GTypeInfo info = {
+ sizeof (GalA11yECellTreeClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) ectr_class_init,
+ (GClassFinalizeFunc) NULL,
+ NULL, /* class_data */
+ sizeof (GalA11yECellTree),
+ 0,
+ (GInstanceInitFunc) ectr_init,
+ NULL /* value_cell_text */
+ };
+
+ type = g_type_register_static (A11Y_PARENT_TYPE, "GalA11yECellTree", &info, 0);
+ gal_a11y_e_cell_type_add_action_interface (type);
+ }
+
+ return type;
+}
+
+AtkObject *
+gal_a11y_e_cell_tree_new (ETableItem *item,
+ ECellView *cell_view,
+ AtkObject *parent,
+ gint model_col,
+ gint view_col,
+ gint row)
+{
+ AtkObject *subcell_a11y;
+ GalA11yECellTree *a11y;
+
+ ETreePath node;
+ ETreeModel *tree_model;
+ ETreeTableAdapter *tree_table_adapter;
+
+ ECellView *subcell_view;
+ subcell_view = e_cell_tree_view_get_subcell_view (cell_view);
+
+ if (subcell_view->ecell) {
+ subcell_a11y = gal_a11y_e_cell_registry_get_object (NULL,
+ item,
+ subcell_view,
+ parent,
+ model_col,
+ view_col,
+ row);
+ gal_a11y_e_cell_add_action (GAL_A11Y_E_CELL (subcell_a11y),
+ _("expand"),
+ _("expands the row in the ETree containing this cell"),
+ NULL,
+ (ACTION_FUNC)ectr_do_action_expand);
+
+ gal_a11y_e_cell_add_action (GAL_A11Y_E_CELL (subcell_a11y),
+ _("collapse"),
+ _("collapses the row in the ETree containing this cell"),
+ NULL,
+ (ACTION_FUNC)ectr_do_action_collapse);
+
+ /* init AtkStates for the cell's a11y object */
+ node = e_table_model_value_at (item->table_model, -1, row);
+ tree_model = e_table_model_value_at (item->table_model, -2, row);
+ tree_table_adapter = e_table_model_value_at (item->table_model, -3, row);
+ if (e_tree_model_node_is_expandable (tree_model, node)) {
+ gal_a11y_e_cell_add_state (GAL_A11Y_E_CELL (subcell_a11y), ATK_STATE_EXPANDABLE, FALSE);
+ if (e_tree_table_adapter_node_is_expanded (tree_table_adapter, node))
+ gal_a11y_e_cell_add_state (GAL_A11Y_E_CELL (subcell_a11y), ATK_STATE_EXPANDED, FALSE);
+ }
+ }
+ else
+ subcell_a11y = NULL;
+
+ /* create a companion a11y object, this object has type GalA11yECellTree
+ and it connects to some signals to determine whether a tree cell is
+ expanded or collapsed */
+ a11y = g_object_new (gal_a11y_e_cell_tree_get_type (), NULL);
+ gal_a11y_e_cell_construct (ATK_OBJECT (a11y),
+ item,
+ cell_view,
+ parent,
+ model_col,
+ view_col,
+ row);
+ a11y->model_row_changed_id =
+ g_signal_connect (item->table_model, "model_row_changed",
+ G_CALLBACK (ectr_model_row_changed_cb),
+ subcell_a11y);
+
+ if (subcell_a11y && subcell_view)
+ {
+ subcell_view->kill_view_cb = kill_view_cb;
+ if (!g_list_find(subcell_view->kill_view_cb_data, subcell_a11y))
+ subcell_view->kill_view_cb_data = g_list_append(subcell_view->kill_view_cb_data, subcell_a11y);
+ }
+
+ g_object_weak_ref (G_OBJECT (subcell_a11y), (GWeakNotify) ectr_subcell_weak_ref, a11y);
+
+ return subcell_a11y;
+}
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