#!/usr/dt/bin/dtksh
#
# xmanagerstat - A sophisticated system status tool with blinking lights.
#	This also is a demo of the X11 capabilities Desktop Korn Shell, dtksh.
#	So far tested on Solaris. ver 0.7
#
# In the days of vacuum tubes and real computers, mainframes were adorned with 
#  blinking status lights. Reading these was quite a skill, one that provides
#  an view of the computer thinking in real time. The desire for this kind of
#  interface exists today, with some IT managers unsatisfied unless they can
#  see blinking lights.
#
# On non-Solaris check the path of your dtksh (may not be "/usr/dt/bin/dtksh").
#
#
# USAGE: xmanagerstat
#
# 	See the code for customisation such as the size of the window.
#
# COPYRIGHT: Copyright (c) 2004 Brendan Gregg.
#
#  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
#  of the License, 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
#  (http://www.gnu.org/copyleft/gpl.html)
# 
# 21-Dec-2004	Brendan Gregg	Created this

#
# --- Variable Decs ---
#
delay=10		# frame delay (ms)
max_x=400		# window size x
max_y=200		# window size y
lights_x=8		# number of x lights
lights_y=3		# number of y lights
width=20		# width of light
title_y=40		# space for title
border_x=0		# was needed during dev

### Labels
word[00]=us
word[01]=sy
word[02]=id
word[03]=re
word[04]=mf
word[05]=pi
word[06]=po
word[07]=sr
word[10]=cpu
word[11]=net
word[12]=io
word[13]=vm
word[14]=tm
word[15]=ctx
word[16]=in
word[17]=sy
word[20]=wt
word[21]=fr
word[22]=fee
word[23]=fi
word[24]=fo
word[25]=fum
word[26]=uid
word[27]=pid


# 
# --- Create X11 window ---
#
XtInitialize TOP linesdemo Linesdemo $0 
XtCreateManagedWidget FORM form XmForm $TOP \
	resizePolicy:RESIZE_NONE \
	height:$max_y width:$max_x x:0 y:0
XtCreateManagedWidget DRAW draw XmDrawingArea $FORM \
	height:$max_y width:$max_x x:0 y:0 \
	background:white foreground:white
XtDisplay DISPLAY $FORM
XSync $DISPLAY true
XtRealizeWidget $TOP
XtWindow WINDOW $DRAW

# Main Title
(( title_x = max_x / 2 - 50 ))
XtCreateManagedWidget LABELt labelt XmLabel $DRAW \
	x:$title_x y:0 background:white foreground:black \
	labelString:"Host: `uname -n`"

# This kludge is needed for some odd dtksh reason,
XtCreateManagedWidget LABELk labelk XmLabel $DRAW \
	x:0 y:$max_y background:white foreground:white \
	labelString:" "


#
# --- Draw Labels ---
#
(( max_y = max_y - title_y ))
(( max_x = max_x - border_x ))
(( nudge_x = max_x / (lights_x * 2) - width / 2 + border_x ))
(( nudge_y = max_y / (lights_y * 2) - width / 2 + title_y ))

word_y=0
while (( word_y < lights_y )); do
	word_x=0
	while (( word_x < lights_x )); do
		(( x = word_x * max_x / lights_x + nudge_x ))
		(( y = word_y * max_y / lights_y + nudge_y - width ))
		XtCreateManagedWidget LABEL$word_y$word_x label$word_y$word_x XmLabel $DRAW \
			x:$x y:$y background:white foreground:black \
			labelString:${word[$word_y$word_x]}
		(( word_x = word_x + 1 ))
	done
	(( word_y = word_y + 1 ))
done


#
# --- Draw Light Function ---
#
function blinking_lights {
	### Pick random coordinates and colour
	(( x = ($RANDOM % lights_x) * max_x / lights_x + nudge_x ))
	(( y = ($RANDOM % lights_y) * max_y / lights_y + nudge_y ))
	(( colour = $RANDOM % 2 ))
	if (( colour == 1 )); then
		colour=red
	else
		colour=black
	fi

	### Draw light
	XFillArc $DISPLAY $WINDOW \
		-background $colour \
		-foreground $colour \
		-line_width 2 \
		-line_style LineSolid \
		$x $y 20 20 0 24000

	XtAddTimeOut ID $delay blinking_lights	# pause, then draw next
}


#
# --- Main ---
#
XtAddTimeOut ID $delay blinking_lights		# pause, then draw light
XtMainLoop