README


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#
# $Id: README,v 1.24 2003/08/01 05:15:42 reinelt Exp $
#

Sorry, there is no README anymore.
Go to http://lcd4linux.sourceforge.net for all the documentation.
/* $Id: widget_icon.c,v 1.8 2004/03/03 03:47:04 reinelt Exp $
 *
 * icon 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_icon.c,v $
 * Revision 1.8  2004/03/03 03:47:04  reinelt
 * big patch from Martin Hejl:
 * - use qprintf() where appropriate
 * - save CPU cycles on gettimeofday()
 * - add quit() functions to free allocated memory
 * - fixed lots of memory leaks
 *
 * Revision 1.7  2004/02/15 21:43:43  reinelt
 * T6963 driver nearly finished
 * framework for graphic displays done
 * i2c_sensors patch from Xavier
 * some more old generation files removed
 *
 * Revision 1.6  2004/02/07 13:45:23  reinelt
 * icon visibility patch #2 from Xavier
 *
 * Revision 1.5  2004/02/04 19:11:44  reinelt
 * icon visibility patch from Xavier
 *
 * Revision 1.4  2004/01/30 20:57:56  reinelt
 * HD44780 patch from Martin Hejl
 * dmalloc integrated
 *
 * Revision 1.3  2004/01/29 04:40:03  reinelt
 * every .c file includes "config.h" now
 *
 * Revision 1.2  2004/01/23 07:04:39  reinelt
 * icons finished!
 *
 * Revision 1.1  2004/01/23 04:54:03  reinelt
 * icon widget added (not finished yet!)
 *
 */

/* 
 * exported functions:
 *
 * WIDGET_CLASS Widget_Icon
 *   the icon 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_icon.h"
#include "qprintf.h"

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif

// icons always are 8 pixels high 
#define YRES 8

static void widget_icon_read_bitmap (char *section, WIDGET_ICON *Icon)
{
  int row, n;
  char  key[15];
  char *val, *v;
  unsigned char *map;
  
  for (row=0; row<YRES; row++) {
    qprintf(key, sizeof(key), "Bitmap.Row%d", row+1);
    val=cfg_get(section, key, ""); 
    map=Icon->bitmap+row;
    n=0;
    for (v=val; *v!='\0'; v++) {
      if (n>=Icon->maxmap) {
	Icon->maxmap++;
	Icon->bitmap=realloc(Icon->bitmap, Icon->maxmap*YRES*sizeof(char));
	memset (Icon->bitmap+n*YRES, 0, YRES*sizeof(char));
	map=Icon->bitmap+n*YRES+row;
      }
      switch (*v) {
      case '|':
	n++;
	map+=YRES;
	break;
      case '*':
	(*map)<<=1;
	(*map)|=1;
	break;
      default:
	(*map)<<=1;
      }
    }
    free(val);
  }
}


void widget_icon_update (void *Self)
{
  WIDGET      *W = (WIDGET*)Self;
  WIDGET_ICON *Icon = W->data;
  RESULT result = {0, 0.0, NULL};
  
  // evaluate expressions
  Icon->speed = 100;
  if (Icon->speed_expr!=NULL && *Icon->speed_expr!='\0') {
    Eval(Icon->speed_expr, &result); 
    Icon->speed = R2N(&result); 
    if (Icon->speed<10) Icon->speed=10;
    DelResult(&result);
  }
  
  Icon->visible = 1;
  if (Icon->visible_expr!=NULL && *Icon->visible_expr!='\0') {
    Eval(Icon->visible_expr, &result); 
    Icon->visible = R2N(&result); 
    if (Icon->visible<1) Icon->visible=0;
    DelResult(&result);
  }  
  
  // rotate icon bitmap
  Icon->curmap++;
  if (Icon->curmap >= Icon->maxmap)
    Icon->curmap=0;
  
  // finally, draw it!
  if (W->class->draw)
    W->class->draw(W);

  // store currently visible bitmap
  Icon->prvmap=Icon->curmap;
  
  // add a new one-shot timer
  timer_add (widget_icon_update, Self, Icon->speed, 1);
  
}


int widget_icon_init (WIDGET *Self) 
{
  char *section;
  WIDGET_ICON *Icon;
  
  // prepare config section
  // strlen("Widget:")=7
  section=malloc(strlen(Self->name)+8);
  strcpy(section, "Widget:");
  strcat(section, Self->name);
  
  Icon=malloc(sizeof(WIDGET_ICON));
  memset (Icon, 0, sizeof(WIDGET_ICON));

  // get raw expressions (we evaluate them ourselves)
  Icon->speed_expr = cfg_get_raw (section, "speed",  NULL);
  Icon->visible_expr = cfg_get_raw (section, "visible",  NULL);  
  
  // sanity check
  if (Icon->speed_expr==NULL || *Icon->speed_expr=='\0') {
    error ("Icon %s has no speed, using '100'", Self->name);
    Icon->speed_expr="100";
  }
  
  // read bitmap
  widget_icon_read_bitmap (section, Icon);
  
  free (section);
  Self->data=Icon;
  
  // as the speed is evaluatod on every call, we use 'one-shot'-timers. 
  // The timer will be reactivated on every call to widget_icon_update(). 
  // We do the initial call here...
  Icon->prvmap=-1;

  // reset ascii 
  Icon->ascii=-1;
  
  // just do it!
  widget_icon_update(Self);

  return 0;
}


int widget_icon_quit (WIDGET *Self) 
{
  WIDGET_ICON *Icon;
  
  if (Self) {
	Icon = Self->data;
    if (Icon) {
      if (Icon->bitmap) free (Icon->bitmap); 
      free(Self->data);
      Self->data=NULL;
    }
  }
  
  return 0;
  
}


WIDGET_CLASS Widget_Icon = {
  name:   "icon",
  init:   widget_icon_init,
  draw:   NULL,
  quit:   widget_icon_quit,
};