/*
 * The display is a lin-log chart of the charge over time.
 * Time is on a log scale.
 * The top pixel line is 60s from now.
 * The bottom of the window is 1h from now.
 *
 * display outputs, per line:
 *
 *   Remaining:	 | Empty:	| Degraded:
 *     blue	 |  black	|  dimgrey	discharging
 *     green	 |  black	|  dimgrey	charging
 *     cyan	 |  black	|  dimgrey	charged
 *     grey	 |  black	|  dimgrey	charging&discharging!
 *     lightgrey |  black	|  dimgrey	none of the above
 *     blue	 |  red  	|  dimgrey	discharging - low!
 *     green	 |  red  	|  dimgrey	charging - low
 *     cyan	 |  red  	|  dimgrey	charged - low [1]
 *     grey	 |  red  	|  dimgrey	charging&discharging, low [1]
 *       ...  darkgreen  ...			no batteries present
 *       ...  yellow  ...			error
 *
 * [1] battery must be quite badly degraded
 */
/*
 * Copyright (C) 2004 Ian Jackson <ian@davenant.greenend.org.uk>
 *
 * This 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 3,
 * or (at your option) any later version.
 *
 * This 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 file; if not, consult the Free Software
 * Foundation's website at www.fsf.org, or the GNU Project website at
 * www.gnu.org.
 */