/*
 * Copyright (C) 2012 - Juan Ferrer Toribio
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include "vn-column-check.h"

G_DEFINE_TYPE (VnColumnCheck, vn_column_check, VN_TYPE_COLUMN);

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private

static void vn_column_check_cb_toggled (GtkCellRendererToggle * cell,
	const gchar * path, VnColumn * obj)
{
	gint col;
	DbIter iter;
	DbModel * model;
	GValue new_value = {0};
	const GValue * old_value;

	col = vn_column_get_column_index (obj);
	model = vn_column_get_model (obj);

	vn_column_get_iter (obj, path, &iter);
	old_value = db_model_get_value (model, &iter, col, NULL);

	g_value_init (&new_value, G_TYPE_BOOLEAN);
	g_value_set_boolean (&new_value,
		gvn_value_is_null (old_value) || !g_value_get_boolean (old_value));
	db_model_set_value (model, &iter, col, &new_value, NULL);
}

static void vn_column_check_set_editable (VnColumn * obj, gboolean editable)
{
	if (editable)
		g_signal_connect (obj->cell, "toggled",
			G_CALLBACK (vn_column_check_cb_toggled), obj);
	else
		g_signal_handlers_disconnect_by_func (obj->cell,
			vn_column_check_cb_toggled, obj);
}

static void vn_column_check_set_value (VnColumnCheck * obj, GtkTreeModel * model,
	GtkTreeIter * iter, GtkCellRendererToggle * cell, const GValue * value)
{
	GValue new_value = {0};
	g_value_init (&new_value, G_TYPE_BOOLEAN);

	if (!gvn_value_is_null (value))
		g_value_transform (value, &new_value);
	else
		g_value_set_boolean (&new_value, FALSE);

	gtk_cell_renderer_toggle_set_active (cell,
		g_value_get_boolean (&new_value));

	g_value_unset (&new_value);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Class

static void vn_column_check_init (VnColumnCheck * obj)
{
	GtkCellRenderer * cell = gtk_cell_renderer_toggle_new ();
	VN_COLUMN_GET_CLASS (obj)->set_renderer (VN_COLUMN (obj), cell); 
}

static void vn_column_check_finalize (VnColumnCheck * obj)
{
	G_OBJECT_CLASS (vn_column_check_parent_class)->finalize (G_OBJECT (obj));
}

static void vn_column_check_class_init (VnColumnCheckClass * klass)
{
	GObjectClass * k = G_OBJECT_CLASS (klass);
	k->finalize = (GObjectFinalizeFunc) vn_column_check_finalize;
	VN_COLUMN_CLASS (klass)->set_value = (VnColumnSetValueFunc) vn_column_check_set_value;
	VN_COLUMN_CLASS (klass)->set_editable = (VnColumnSetEditableFunc) vn_column_check_set_editable;
}