/*
 * 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-entry.h"
#include <db/db.h>

/**
 * SECTION:vn-entry
 * @Short_description: a text box widget
 * @Title: VnEntry
 * @See_also: #VnField
 * @Image: entry.png
 *
 * A text box representing a generic value field.
 */
G_DEFINE_TYPE (VnEntry, vn_entry, VN_TYPE_FIELD);

/**
 * vn_entry_new:
 *
 * Creates a new #VnEntry
 *
 * Return value: a #VnEntry
 **/
VnField * vn_entry_new (VnEntry * obj)
{
	return g_object_new (VN_TYPE_ENTRY, NULL);
}

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

static void	vn_entry_cb_editing_done (GtkEntry * entry, VnField * obj)
{
	GValue value = {0};
	const gchar * text = gtk_entry_get_text (entry);
	
	if (g_strcmp0 (text, "") || !vn_field_get_null (obj))
	{
		g_value_init (&value, G_TYPE_STRING);
		g_value_set_string (&value, text);
	}
	else
		g_value_init (&value, GVN_TYPE_NULL);

	VN_FIELD_GET_CLASS (obj)->value_changed (obj, &value);
	g_value_unset (&value);
}

static gboolean vn_entry_cb_focus_out (GtkEntry * entry, GdkEvent * event, VnField * obj)
{
	vn_entry_cb_editing_done (entry, obj);
	return FALSE;
}

static void vn_entry_set_value (VnEntry * obj, const GValue * value)
{
	GValue new_value = {0};
	gvn_value_to_format_string (value, obj->digits, &new_value);

	g_signal_handlers_block_by_func (obj->entry,
		vn_entry_cb_editing_done, obj);
	g_signal_handlers_block_by_func (obj->entry,
		vn_entry_cb_focus_out, obj);

	gtk_entry_set_text (obj->entry,
		g_value_get_string (&new_value));

	g_signal_handlers_unblock_by_func (obj->entry,
		vn_entry_cb_editing_done, obj);
	g_signal_handlers_unblock_by_func (obj->entry,
		vn_entry_cb_focus_out, obj);
	
	g_value_unset (&new_value);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties

enum
{
	 PROP_DIGITS = 1
};

static void vn_entry_set_property (VnEntry * obj, guint id,
	const GValue * value, GParamSpec * pspec)
{
	switch (id)
	{
		case PROP_DIGITS:
			obj->digits = g_value_get_uint (value);
			break;
		default:		
			G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, id, pspec);
	}
}

static void vn_entry_get_property (VnEntry * obj, guint id,
	GValue * value, GParamSpec * pspec)
{	
	switch (id)
	{
		case PROP_DIGITS:
			g_value_set_uint (value, obj->digits);
			break;
		default:		
			G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, id, pspec);
	}
}

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

static void vn_entry_init (VnEntry * obj)
{
	obj->entry = GTK_ENTRY (gtk_entry_new ());
	g_object_connect (obj->entry
		,"signal::activate", vn_entry_cb_editing_done, obj
		,"signal::focus-out-event", vn_entry_cb_focus_out, obj
		,NULL
	);
	gtk_container_add (GTK_CONTAINER (obj), GTK_WIDGET (obj->entry));

	VN_FIELD (obj)->field = GTK_WIDGET (obj->entry);
}

static void vn_entry_finalize (VnEntry * obj)
{
	G_OBJECT_CLASS (vn_entry_parent_class)->finalize (G_OBJECT (obj));
}

static void vn_entry_class_init (VnEntryClass * klass)
{
	GObjectClass * k = G_OBJECT_CLASS (klass);
	k->set_property = (GObjectSetPropertyFunc) vn_entry_set_property;
	k->get_property = (GObjectGetPropertyFunc) vn_entry_get_property;
	k->finalize = (GObjectFinalizeFunc) vn_entry_finalize;
	VN_FIELD_CLASS (klass)->set_value = (VnFieldSetValueFunc) vn_entry_set_value;
	
	g_object_class_install_property (k, PROP_DIGITS,
		g_param_spec_uint ("digits"
			,_("Digits")
			,_("The number of decimal places to display.")
			,0 ,20 ,0
			,G_PARAM_CONSTRUCT | G_PARAM_READWRITE
	));
}