/*
 * 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:
 *		Damon Chaplin <damon@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

/*
 * ECellPercent - a subclass of ECellText used to show an integer percentage
 * in an ETable.
 */

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

#include <ctype.h>

#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>
#include <libgnomeui/gnome-messagebox.h>
#include <glib/gi18n.h>

#include "e-cell-percent.h"

G_DEFINE_TYPE (ECellPercent, e_cell_percent, E_CELL_TEXT_TYPE)


static char *
ecp_get_text (ECellText *cell, ETableModel *model, int col, int row)
{
	int percent;
	static char buffer[8];

	percent = GPOINTER_TO_INT (e_table_model_value_at (model, col, row));

	/* A -ve value means the property is not set. */
	if (percent < 0) {
		buffer[0] = '\0';
	} else {
		g_snprintf (buffer, sizeof (buffer), "%i%%", percent);
	}

	return buffer;
}

static void
ecp_free_text(ECellText *cell, char *text)
{
	/* Do Nothing. */
}

/* FIXME: We need to set the "transient_for" property for the dialog. */
static void
show_percent_warning (void)
{
	GtkWidget *dialog;

	dialog = gtk_message_dialog_new (
		NULL, 0,
		GTK_MESSAGE_ERROR, GTK_BUTTONS_OK,
		"%s", _("The percent value must be between 0 and 100, inclusive"));
	gtk_dialog_run (GTK_DIALOG (dialog));
	gtk_widget_destroy (dialog);
}

static void
ecp_set_value (ECellText *cell, ETableModel *model, int col, int row,
	       const char *text)
{
	int matched, percent;
	gboolean empty = TRUE;
	const char *p;

	if (text) {
		p = text;
		while (*p) {
			if (!isspace ((unsigned char) *p)) {
				empty = FALSE;
				break;
			}
			p++;
		}
	}

	if (empty) {
		percent = -1;
	} else {
		matched = sscanf (text, "%i", &percent);

		if (matched != 1 || percent < 0 || percent > 100) {
			show_percent_warning ();
			return;
		}
	}

	e_table_model_set_value_at (model, col, row,
				    GINT_TO_POINTER (percent));
}

static void
e_cell_percent_class_init (ECellPercentClass *ecpc)
{
	ECellTextClass *ectc = (ECellTextClass *) ecpc;

	ectc->get_text  = ecp_get_text;
	ectc->free_text = ecp_free_text;
	ectc->set_value = ecp_set_value;
}

static void
e_cell_percent_init (ECellPercent *ecp)
{
}

/**
 * e_cell_percent_new:
 * @fontname: font to be used to render on the screen
 * @justify: Justification of the string in the cell.
 *
 * Creates a new ECell renderer that can be used to render an integer
 * percentage that comes from the model.  The value returned from the model is
 * interpreted as being an int.
 *
 * See ECellText for other features.
 *
 * Returns: an ECell object that can be used to render numbers.
 */
ECell *
e_cell_percent_new (const char *fontname, GtkJustification justify)
{
	ECellPercent *ecn = g_object_new (E_CELL_PERCENT_TYPE, NULL);

	e_cell_text_construct (E_CELL_TEXT(ecn), fontname, justify);

	return (ECell *) ecn;
}
