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# -*-Perl-*-
# the best beginning module example. Very simple, uses the standard hooks.
# instances allowed: one
# (single instance modules would be silly to use more than one of
# anyway, so we use package local storage. This is faster and places
# less artificial load on the machine than doing everything through
# the object hash)
package MGMmodule::loadav;
use vars qw($xpath $widget $graph);
sub module_init{
my$this=shift;
my$toplevel=$this->{"toplevel"};
my$xclass=$this->{"xclass"};
unless (open(PROC,"</proc/loadavg")){
$toplevel->optionAdd("$xclass*active",'false',21);
}
$toplevel->optionAdd("$xclass.order", 2,21);
$this;
}
sub module_instance{
my$this=shift;
my$toplevel=$this->{"toplevel"};
return undef if(defined($xpath));
$xpath=$this->{"xpath"};
# modify defaults
$toplevel->optionAdd("$xpath*scalerefresh",2000,21); # 2s
$toplevel->optionAdd("$xpath.bar.0.label", "Load average",21);
$toplevel->optionAdd("$xpath.bar.1.label", "Load (5min)",21);
$toplevel->optionAdd("$xpath.bar.2.label", "Load (15min)",21);
$toplevel->optionAdd("$xpath.scalewidadj", 220,21); # narrower
$toplevel->optionAdd("$xpath.scalelenadj", 60,21); # shorter
my($minx,$miny)=&MGM::Graph::calcxysize($this,1024*1024*512,' proc(s)',3);
$toplevel->optionAdd("$xpath.minx", $minx,21);
$toplevel->optionAdd("$xpath.miny", $miny,21);
$this;
}
sub module_run{
my$this=shift;
$graph=MGM::Graph->new($this,num=>3,prompt=>' proc(s)');
$widget=$graph->{"widget"}; # must return the widget
}
sub module_update{
my$this=shift;
if(open(PROC,"</proc/loadavg")){
sysread PROC, $_, 1024;
if(m/^([0123456789\.]+)\s*([0123456789\.]+)\s*([0123456789\.]+)/){
$graph->set($1,$2,$3);
}
close PROC;
}
}
sub destroy{
undef $xpath;
}
bless {};
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