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/* $Id: widget_bar.c,v 1.6 2004/01/29 04:40:03 reinelt Exp $
*
* bar widget handling
*
* Copyright 2003,2004 Michael Reinelt <reinelt@eunet.at>
* Copyright 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.
*
*
* $Log: widget_bar.c,v $
* Revision 1.6 2004/01/29 04:40:03 reinelt
* every .c file includes "config.h" now
*
* Revision 1.5 2004/01/23 04:54:00 reinelt
* icon widget added (not finished yet!)
*
* Revision 1.4 2004/01/20 14:25:12 reinelt
* some reorganization
* moved drv_generic to drv_generic_serial
* moved port locking stuff to drv_generic_serial
*
* Revision 1.3 2004/01/20 12:45:47 reinelt
* "Default screen" working with MatrixOrbital
*
* Revision 1.2 2004/01/20 04:51:39 reinelt
* moved generic stuff from drv_MatrixOrbital to drv_generic
* implemented new-stylish bars which are nearly finished
*
* Revision 1.1 2004/01/18 21:25:16 reinelt
* Framework for bar widget opened
*
*/
/*
* 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 "evaluator.h"
#include "timer.h"
#include "widget.h"
#include "widget_bar.h"
void widget_bar_update (void *Self)
{
WIDGET *W = (WIDGET*)Self;
WIDGET_BAR *Bar = W->data;
RESULT result = {0, 0.0, NULL};
double val1, val2;
double min, max;
// evaluate expressions
val1 = 0.0;
if (Bar->expression1!=NULL && *Bar->expression1!='\0') {
Eval(Bar->expression1, &result);
val1 = R2N(&result);
DelResult(&result);
}
val2 = val1;
if (Bar->expression2!=NULL && *Bar->expression2!='\0') {
Eval(Bar->expression2, &result);
val2 = R2N(&result);
DelResult(&result);
}
// minimum: if expression is empty, do auto-scaling
if (Bar->expr_min!=NULL && *Bar->expr_min!='\0') {
Eval(Bar->expr_min, &result);
min = R2N(&result);
DelResult(&result);
} else {
min = Bar->min;
if (val1 < min) min = val1;
if (val2 < min) min = val2;
}
// maximum: if expression is empty, do auto-scaling
if (Bar->expr_max!=NULL && *Bar->expr_max!='\0') {
Eval(Bar->expr_max, &result);
max = R2N(&result);
DelResult(&result);
} 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));
// get raw expressions (we evaluate them ourselves)
Bar->expression1 = cfg_get_raw (section, "expression", NULL);
Bar->expression2 = cfg_get_raw (section, "expression2", NULL);
// sanity check
if (Bar->expression1==NULL || *Bar->expression1=='\0') {
error ("widget %s has no expression, using '0.0'", Self->name);
Bar->expression1="0";
}
// minimum and maximum value
Bar->expr_min = cfg_get_raw (section, "min", NULL);
Bar->expr_max = cfg_get_raw (section, "max", NULL);
// bar length, default 1
cfg_number (section, "length", 1, 0, 99999, &(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);
// update interval (msec), default 1 sec
cfg_number (section, "update", 1000, 10, 99999, &(Bar->update));
// buffer
// Bar->buffer=malloc(Bar->width+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->data) {
free (Self->data);
Self->data=NULL;
}
return 0;
}
WIDGET_CLASS Widget_Bar = {
name: "bar",
init: widget_bar_init,
draw: NULL,
quit: widget_bar_quit,
};
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