path: root/widgets/table/gal-a11y-e-table-click-to-add.c

/*
 * 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:
 *      Yuedong Du <yuedong.du@sun.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <atk/atk.h>

#include "a11y/gal-a11y-util.h"
#include "table/e-table-click-to-add.h"
#include "table/e-table-group.h"
#include "table/e-table-group-leaf.h"
#include <glib/gi18n.h>

#include "gal-a11y-e-table-click-to-add.h"
#include "gal-a11y-e-table-click-to-add-factory.h"

static AtkObjectClass *parent_class;
static GType parent_type;
static gint priv_offset;
#define GET_PRIVATE(object) \
    ((GalA11yETableClickToAddPrivate *) \
    (((gchar *) object) + priv_offset))
#define PARENT_TYPE (parent_type)

struct _GalA11yETableClickToAddPrivate {
    gpointer rect;
    gpointer row;
};

static gint
etcta_get_n_actions (AtkAction *action)
{
    return 1;
}

static const gchar *
etcta_get_description (AtkAction *action,
                       gint i)
{
    if (i == 0)
        return _("click to add");

    return NULL;
}

static const gchar *
etcta_action_get_name (AtkAction *action,
                       gint i)
{
    if (i == 0)
        return _("click");

    return NULL;
}

static gboolean
idle_do_action (gpointer data)
{
    GtkLayout *layout;
    GdkEventButton event;
    ETableClickToAdd * etcta;
    gint finished;

    g_return_val_if_fail ( data!= NULL, FALSE);

    etcta = E_TABLE_CLICK_TO_ADD (
        atk_gobject_accessible_get_object (
        ATK_GOBJECT_ACCESSIBLE (data)));
    g_return_val_if_fail (etcta, FALSE);

    layout = GTK_LAYOUT (GNOME_CANVAS_ITEM (etcta)->canvas);

    event.x = 0;
    event.y = 0;
    event.type = GDK_BUTTON_PRESS;
    event.window = gtk_layout_get_bin_window (layout);
    event.button = 1;
    event.send_event = TRUE;
    event.time = GDK_CURRENT_TIME;
    event.axes = NULL;

    g_signal_emit_by_name (etcta, "event", &event, &finished);

    return FALSE;
}

static gboolean
etcta_do_action (AtkAction *action,
                 gint i)
{
    g_return_val_if_fail (i == 0, FALSE);

    g_idle_add (idle_do_action, action);

    return TRUE;
}

static void
atk_action_interface_init (AtkActionIface *iface)
{
    g_return_if_fail (iface != NULL);

    iface->do_action = etcta_do_action;
    iface->get_n_actions = etcta_get_n_actions;
    iface->get_description = etcta_get_description;
    iface->get_name = etcta_action_get_name;
}

static const gchar *
etcta_get_name (AtkObject *obj)
{
    ETableClickToAdd * etcta;

    g_return_val_if_fail (GAL_A11Y_IS_E_TABLE_CLICK_TO_ADD (obj), NULL);

    etcta = E_TABLE_CLICK_TO_ADD (
        atk_gobject_accessible_get_object (
        ATK_GOBJECT_ACCESSIBLE (obj)));
    if (etcta && etcta->message != NULL)
        return etcta->message;

    return _("click to add");
}

static gint
etcta_get_n_children (AtkObject *accessible)
{
    return 1;
}

static AtkObject *
etcta_ref_child (AtkObject *accessible,
                 gint i)
{
    AtkObject * atk_obj = NULL;
    ETableClickToAdd * etcta;

    if (i != 0)
        return NULL;

    etcta  = E_TABLE_CLICK_TO_ADD (
        atk_gobject_accessible_get_object (
        ATK_GOBJECT_ACCESSIBLE (accessible)));

    g_return_val_if_fail (etcta, NULL);

    if (etcta->rect) {
        atk_obj = atk_gobject_accessible_for_object (
            G_OBJECT (etcta->rect));
    } else if (etcta->row) {
        atk_obj = atk_gobject_accessible_for_object (
            G_OBJECT (etcta->row));
    }

    g_object_ref (atk_obj);

    return atk_obj;
}

static AtkStateSet *
etcta_ref_state_set (AtkObject *accessible)
{
    AtkStateSet * state_set = NULL;

    state_set = ATK_OBJECT_CLASS (parent_class)->ref_state_set (accessible);
    if (state_set != NULL) {
        atk_state_set_add_state (state_set, ATK_STATE_SENSITIVE);
        atk_state_set_add_state (state_set, ATK_STATE_SHOWING);
    }

    return state_set;
}

static void
etcta_class_init (GalA11yETableClickToAddClass *class)
{
    AtkObjectClass *atk_object_class = ATK_OBJECT_CLASS (class);

    parent_class = g_type_class_ref (PARENT_TYPE);

    atk_object_class->get_name = etcta_get_name;
    atk_object_class->get_n_children = etcta_get_n_children;
    atk_object_class->ref_child = etcta_ref_child;
    atk_object_class->ref_state_set = etcta_ref_state_set;
}

static void
etcta_init (GalA11yETableClickToAdd *a11y)
{
}

GType
gal_a11y_e_table_click_to_add_get_type (void)
{
    static GType type = 0;

    if (!type) {
        AtkObjectFactory *factory;

        GTypeInfo info = {
            sizeof (GalA11yETableClickToAddClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) etcta_class_init,
            (GClassFinalizeFunc) NULL,
            NULL, /* class_data */
            sizeof (GalA11yETableClickToAdd),
            0,
            (GInstanceInitFunc) etcta_init,
            NULL /* value_table */
        };

        static const GInterfaceInfo atk_action_info = {
            (GInterfaceInitFunc) atk_action_interface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

        factory = atk_registry_get_factory (
            atk_get_default_registry (),
            GNOME_TYPE_CANVAS_ITEM);

        parent_type = atk_object_factory_get_accessible_type (factory);
        type = gal_a11y_type_register_static_with_private (PARENT_TYPE,
                "GalA11yETableClickToAdd", &info, 0,
                sizeof (GalA11yETableClickToAddPrivate), &priv_offset);

        g_type_add_interface_static (type, ATK_TYPE_ACTION, &atk_action_info);

    }

    return type;
}

static gboolean
etcta_event (GnomeCanvasItem *item,
             GdkEvent *e,
             gpointer data)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (item);
    GalA11yETableClickToAdd *a11y;
    GalA11yETableClickToAddPrivate *priv;

    g_return_val_if_fail (item, TRUE);

    g_return_val_if_fail (GAL_A11Y_IS_E_TABLE_CLICK_TO_ADD (data), FALSE);
    a11y = GAL_A11Y_E_TABLE_CLICK_TO_ADD (data);

    priv = GET_PRIVATE (a11y);

    /* rect replaced by row. */
    if (etcta->rect == NULL && priv->rect != NULL) {
        g_signal_emit_by_name (a11y, "children_changed::remove", 0, NULL, NULL);

    }
    /* row inserted, and/or replaced by a new row. */
    if (etcta->row != NULL && priv->row == NULL) {
        g_signal_emit_by_name (a11y, "children_changed::add", 0, NULL, NULL);
    } else if (etcta->row != NULL && priv->row != NULL && etcta->row != priv->row) {
        g_signal_emit_by_name (a11y, "children_changed::remove", 0, NULL, NULL);
        g_signal_emit_by_name (a11y, "children_changed::add", 0, NULL, NULL);
    }

    priv->rect = etcta->rect;
    priv->row = etcta->row;

    return FALSE;
}

static void
etcta_selection_cursor_changed (ESelectionModel *esm,
                                gint row,
                                gint col,
                                GalA11yETableClickToAdd *a11y)
{
    ETableClickToAdd *etcta;
    AtkObject *row_a11y;

    etcta = E_TABLE_CLICK_TO_ADD (
        atk_gobject_accessible_get_object (
        ATK_GOBJECT_ACCESSIBLE (a11y)));

    if (etcta == NULL || etcta->row == NULL)
        return;

    row_a11y = atk_gobject_accessible_for_object (G_OBJECT (etcta->row));
    if (row_a11y) {
        AtkObject *cell_a11y;

        cell_a11y = g_object_get_data (
            G_OBJECT (row_a11y), "gail-focus-object");
        if (cell_a11y) {
            atk_focus_tracker_notify (cell_a11y);
        }
    }
}

AtkObject *
gal_a11y_e_table_click_to_add_new (GObject *widget)
{
    GalA11yETableClickToAdd *a11y;
    ETableClickToAdd * etcta;
    GalA11yETableClickToAddPrivate *priv;

    g_return_val_if_fail (widget != NULL, NULL);

    a11y = g_object_new (gal_a11y_e_table_click_to_add_get_type (), NULL);
    priv = GET_PRIVATE (a11y);

    etcta = E_TABLE_CLICK_TO_ADD (widget);

    atk_object_initialize (ATK_OBJECT (a11y), etcta);

    priv->rect = etcta->rect;
    priv->row = etcta->row;

    g_signal_connect_after (
        widget, "event",
        G_CALLBACK (etcta_event), a11y);

    g_signal_connect (
        etcta->selection, "cursor_changed",
        G_CALLBACK (etcta_selection_cursor_changed), a11y);

    return ATK_OBJECT (a11y);
}

void
gal_a11y_e_table_click_to_add_init (void)
{
    if (atk_get_root ())
        atk_registry_set_factory_type (
            atk_get_default_registry (),
            E_TYPE_TABLE_CLICK_TO_ADD,
            gal_a11y_e_table_click_to_add_factory_get_type ());
}