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/* $Id: widget_bar.c 789 2007-04-30 04:48:10Z michael $
* $URL: https://ssl.bulix.org/svn/lcd4linux/branches/0.10.1/widget_bar.c $
*
* bar widget handling
*
* Copyright (C) 2003, 2004 Michael Reinelt <reinelt@eunet.at>
* Copyright (C) 2004 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_Bar
* the bar 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_bar.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
void widget_bar_update(void *Self)
{
WIDGET *W = (WIDGET *) Self;
WIDGET_BAR *Bar = W->data;
double val1, val2;
double min, max;
/* evaluate properties */
property_eval(&Bar->expression1);
val1 = P2N(&Bar->expression1);
if (property_valid(&Bar->expression2)) {
property_eval(&Bar->expression2);
val2 = P2N(&Bar->expression2);
} else {
val2 = val1;
}
/* minimum: if expression is empty, do auto-scaling */
if (property_valid(&Bar->expr_min)) {
property_eval(&Bar->expr_min);
min = P2N(&Bar->expr_min);
} else {
min = Bar->min;
if (val1 < min)
min = val1;
if (val2 < min)
min = val2;
}
/* maximum: if expression is empty, do auto-scaling */
if (property_valid(&Bar->expr_max)) {
property_eval(&Bar->expr_max);
max = P2N(&Bar->expr_max);
} else {
max = Bar->max;
if (val1 > max)
max = val1;
if (val2 > max)
max = val2;
}
/* calculate bar values */
Bar->min = min;
Bar->max = max;
if (max > min) {
Bar->val1 = (val1 - min) / (max - min);
Bar->val2 = (val2 - min) / (max - min);
} else {
Bar->val1 = 0.0;
Bar->val2 = 0.0;
}
/* finally, draw it! */
if (W->class->draw)
W->class->draw(W);
}
int widget_bar_init(WIDGET * Self)
{
char *section;
char *c;
WIDGET_BAR *Bar;
/* prepare config section */
/* strlen("Widget:")=7 */
section = malloc(strlen(Self->name) + 8);
strcpy(section, "Widget:");
strcat(section, Self->name);
Bar = malloc(sizeof(WIDGET_BAR));
memset(Bar, 0, sizeof(WIDGET_BAR));
/* load properties */
property_load(section, "expression", NULL, &Bar->expression1);
property_load(section, "expression2", NULL, &Bar->expression2);
property_load(section, "min", NULL, &Bar->expr_min);
property_load(section, "max", NULL, &Bar->expr_max);
/* sanity checks */
if (!property_valid(&Bar->expression1)) {
error("Warning: widget %s has no expression", section);
}
/* bar length, default 1 */
cfg_number(section, "length", 1, 0, -1, &(Bar->length));
/* direction: East (default), West, North, South */
c = cfg_get(section, "direction", "E");
switch (toupper(*c)) {
case 'E':
Bar->direction = DIR_EAST;
break;
case 'W':
Bar->direction = DIR_WEST;
break;
case 'N':
Bar->direction = DIR_NORTH;
break;
case 'S':
Bar->direction = DIR_SOUTH;
break;
default:
error("widget %s has unknown direction '%s', using 'East'", Self->name, c);
Bar->direction = DIR_EAST;
}
free(c);
/* style: none (default), hollow */
c = cfg_get(section, "style", "0");
switch (toupper(*c)) {
case 'H':
Bar->style = STYLE_HOLLOW;
if (!(Bar->direction & (DIR_EAST | DIR_WEST))) {
error("widget %s with style \"hollow\" not implemented", Self->name);
Bar->style = 0;
}
break;
default:
Bar->style = 0;
}
free(c);
/* update interval (msec), default 1 sec */
cfg_number(section, "update", 1000, 10, -1, &(Bar->update));
/* get widget special colors */
Bar->color_valid[0] = widget_color(section, Self->name, "barcolor0", &Bar->color[0]);
Bar->color_valid[1] = widget_color(section, Self->name, "barcolor1", &Bar->color[1]);
free(section);
Self->data = Bar;
timer_add(widget_bar_update, Self, Bar->update, 0);
return 0;
}
int widget_bar_quit(WIDGET * Self)
{
if (Self) {
if (Self->data) {
WIDGET_BAR *Bar = Self->data;
property_free(&Bar->expression1);
property_free(&Bar->expression2);
property_free(&Bar->expr_min);
property_free(&Bar->expr_max);
free(Self->data);
}
Self->data = NULL;
}
return 0;
}
WIDGET_CLASS Widget_Bar = {
.name = "bar",
.type = WIDGET_TYPE_RC,
.init = widget_bar_init,
.draw = NULL,
.quit = widget_bar_quit,
};
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