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/* $Id: widget_gpo.c 773 2007-02-25 12:39:09Z michael $
* $URL: https://ssl.bulix.org/svn/lcd4linux/branches/0.10.1/widget_gpo.c $
*
* GPO widget handling
*
* Copyright (C) 2005 Michael Reinelt <reinelt@eunet.at>
* Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* 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 2, 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* exported functions:
*
* WIDGET_CLASS Widget_GPO
* the GPO widget
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "debug.h"
#include "cfg.h"
#include "property.h"
#include "timer.h"
#include "widget.h"
#include "widget_gpo.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
void widget_gpo_update(void *Self)
{
WIDGET *W = (WIDGET *) Self;
WIDGET_GPO *GPO = W->data;
/* evaluate properties */
property_eval(&GPO->expression);
property_eval(&GPO->update);
/* finally, draw it! */
if (W->class->draw)
W->class->draw(W);
/* add a new one-shot timer */
if (P2N(&GPO->update) > 0) {
timer_add(widget_gpo_update, Self, P2N(&GPO->update), 1);
}
}
int widget_gpo_init(WIDGET * Self)
{
char *section;
WIDGET_GPO *GPO;
/* prepare config section */
/* strlen("Widget:")=7 */
section = malloc(strlen(Self->name) + 8);
strcpy(section, "Widget:");
strcat(section, Self->name);
GPO = malloc(sizeof(WIDGET_GPO));
memset(GPO, 0, sizeof(WIDGET_GPO));
/* load properties */
property_load(section, "expression", NULL, &GPO->expression);
property_load(section, "update", "1000", &GPO->update);
/* sanity checks */
if (!property_valid(&GPO->expression)) {
error("Warning: widget %s has no expression", section);
}
free(section);
Self->data = GPO;
/* fire it the first time */
widget_gpo_update(Self);
return 0;
}
int widget_gpo_quit(WIDGET * Self)
{
if (Self && Self->data) {
WIDGET_GPO *GPO = Self->data;
property_free(&GPO->expression);
property_free(&GPO->update);
free(Self->data);
Self->data = NULL;
}
return 0;
}
WIDGET_CLASS Widget_GPO = {
.name = "gpo",
.type = WIDGET_TYPE_GPO,
.init = widget_gpo_init,
.draw = NULL,
.quit = widget_gpo_quit,
};
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