evolution/widgets/table/gal-a11y-e-cell-toggle.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:
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <gtk/gtk.h>

#include "table/e-cell-toggle.h"
#include "table/e-table-model.h"
#include <glib/gi18n.h>

#include "gal-a11y-e-cell-toggle.h"

#define PARENT_TYPE  (gal_a11y_e_cell_get_type ())
static GObjectClass *parent_class;

static void gal_a11y_e_cell_toggle_class_init (GalA11yECellToggleClass *class);

static void
gal_a11y_e_cell_toggle_dispose (GObject *object)
{
	GalA11yECellToggle *a11y = GAL_A11Y_E_CELL_TOGGLE (object);

	ETableModel *e_table_model = GAL_A11Y_E_CELL (a11y)->item->table_model;

	if (e_table_model && a11y->model_id > 0) {
		g_signal_handler_disconnect (e_table_model, a11y->model_id);
		a11y->model_id = 0;
	}

	if (parent_class->dispose)
		parent_class->dispose (object);
}

GType
gal_a11y_e_cell_toggle_get_type (void)
{
  static GType type = 0;

  if (!type)
    {
      static const GTypeInfo tinfo =
      {
	sizeof (GalA11yECellToggleClass),
	(GBaseInitFunc) NULL, /* base init */
	(GBaseFinalizeFunc) NULL, /* base finalize */
	(GClassInitFunc) gal_a11y_e_cell_toggle_class_init, /* class init */
	(GClassFinalizeFunc) NULL, /* class finalize */
	NULL, /* class data */
	sizeof (GalA11yECellToggle), /* instance size */
	0, /* nb preallocs */
	NULL, /* instance init */
	NULL /* value table */
      };

      type = g_type_register_static (GAL_A11Y_TYPE_E_CELL,
				     "GalA11yECellToggle", &tinfo, 0);
      gal_a11y_e_cell_type_add_action_interface (type);

    }
  return type;
}

static void
gal_a11y_e_cell_toggle_class_init (GalA11yECellToggleClass *class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (class);

	object_class->dispose      = gal_a11y_e_cell_toggle_dispose;
	parent_class               = g_type_class_ref (PARENT_TYPE);
}

static void
toggle_cell_action (GalA11yECell *cell)
{
	gint finished;
	GtkLayout *layout;
	GdkEventButton event;
	gint x, y, width, height;
	gint row, col;

	row = cell->row;
	col = cell->view_col;

	layout = GTK_LAYOUT (GNOME_CANVAS_ITEM (cell->item)->canvas);

	e_table_item_get_cell_geometry (
		cell->item, &row, &col, &x, &y, &width, &height);

	event.x = x + width / 2 + (gint)(GNOME_CANVAS_ITEM (cell->item)->x1);
	event.y = y + height / 2 + (gint)(GNOME_CANVAS_ITEM (cell->item)->y1);

	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 (cell->item, "event", &event, &finished);
}

static void
model_change_cb (ETableModel *etm,
                 gint col,
                 gint row,
                 GalA11yECell *cell)
{
	gint value;

	if (col == cell->model_col && row == cell->row) {

		value = GPOINTER_TO_INT (
			e_table_model_value_at (cell->cell_view->e_table_model,
						cell->model_col, cell->row));
		/* Cheat gnopernicus, or it will ignore the state change signal  */
		atk_focus_tracker_notify (ATK_OBJECT (cell));

		if (value)
			gal_a11y_e_cell_add_state (cell, ATK_STATE_CHECKED, TRUE);
		else
			gal_a11y_e_cell_remove_state (cell, ATK_STATE_CHECKED, TRUE);
	}
}

AtkObject *
gal_a11y_e_cell_toggle_new (ETableItem *item,
                            ECellView *cell_view,
                            AtkObject *parent,
                            gint model_col,
                            gint view_col,
                            gint row)
{
	AtkObject *a11y;
	GalA11yECell *cell;
	GalA11yECellToggle *toggle_cell;
	gint value;

	a11y = ATK_OBJECT (g_object_new (GAL_A11Y_TYPE_E_CELL_TOGGLE, NULL));

	g_return_val_if_fail (a11y != NULL, NULL);

	cell = GAL_A11Y_E_CELL (a11y);
	toggle_cell = GAL_A11Y_E_CELL_TOGGLE (a11y);
	a11y->role  = ATK_ROLE_TABLE_CELL;

	gal_a11y_e_cell_construct (a11y,
				   item,
				   cell_view,
				   parent,
				   model_col,
				   view_col,
				   row);

	gal_a11y_e_cell_add_action (cell,
				    "toggle",
				    /* Translators: description of a "toggle" action */
				    _("toggle the cell"),
				    NULL,              /* action keybinding */
				    toggle_cell_action);

	toggle_cell->model_id = g_signal_connect (
		item->table_model, "model_cell_changed",
		(GCallback) model_change_cb, a11y);

	value = GPOINTER_TO_INT (
			e_table_model_value_at (cell->cell_view->e_table_model,
						cell->model_col, cell->row));
	if (value)
		gal_a11y_e_cell_add_state (cell, ATK_STATE_CHECKED, FALSE);
	else
		gal_a11y_e_cell_remove_state (cell, ATK_STATE_CHECKED, FALSE);

	return a11y;
}