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/* $Id$
* $URL$
*
* GPO widget handling
*
* Copyright (C) 2005 Michael Reinelt <reinelt@eunet.at>
* Copyright (C) 2005 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 "evaluator.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;
RESULT result = { 0, 0, 0, NULL };
int val;
/* evaluate expression */
val = 0;
if (GPO->tree != NULL) {
Eval(GPO->tree, &result);
val = R2N(&result);
DelResult(&result);
}
GPO->num = W->row;
GPO->val = val;
/* finally, draw it! */
if (W->class->draw)
W->class->draw(W);
}
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));
/* get raw expression (we evaluate them ourselves) */
GPO->expression = cfg_get_raw(section, "expression", NULL);
/* sanity check */
if (GPO->expression == NULL || *GPO->expression == '\0') {
error("widget %s has no expression, using '0.0'", Self->name);
GPO->expression = "0";
}
/* compile expression */
Compile(GPO->expression, &GPO->tree);
/* update interval (msec), default 1 sec */
cfg_number(section, "update", 1000, 10, -1, &(GPO->update));
free(section);
Self->data = GPO;
timer_add(widget_gpo_update, Self, GPO->update, 0);
return 0;
}
int widget_gpo_quit(WIDGET * Self)
{
if (Self) {
if (Self->data) {
WIDGET_GPO *GPO = Self->data;
DelTree(GPO->tree);
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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