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Progress(3)                          User Contributed Perl Documentation                         Progress(3)



NAME
       Time::Progress - Elapsed and estimated finish time reporting.

SYNOPSIS
         use Time::Progress;
         # autoflush to get \r working
         $| = 1;
         # get new `timer'
         my $p = new Time::Progress;

         # restart and report progress
         $p->restart;
         sleep 5; # or do some work here
         print $p->report( "done %p elapsed: %L (%l sec), ETA %E (%e sec)\n", 50 );

         # set min and max values
         $p->attr( min => 2, max => 20 );
         # restart `timer'
         $p->restart;
         my $c;
         for( $c = 2; $c <= 20; $c++ )
           {
           # print progress bar and percentage done
           print $p->report( "eta: %E min, %40b %p\r", $c );
           sleep 1; # work...
           }
         # stop timer
         $p->stop;

         # report times
         print $p->elapsed_str;

DESCRIPTION
       Shortest time interval that can be measured is 1 second. The available methods are:

       new
             my $p = new Time::Progress;

           Returns new object of Time::Progress class and starts the timer. It also sets min and max values
           to 0 and 100, so the next report calls will default to percents range.

       restart
           restarts the timer and clears the stop mark. optionally restart() may act also as attr() for
           setting attributes:

             $p->restart( min => 1, max => 5 );

           is the same as:

             $p->attr( min => 1, max => 5 );
             $p->restart();

           If you need to count things, you can set just 'max' attribute since 'min' is already set to 0
           when object is constructed by new():

             $p->restart( max => 42 );

       stop
           Sets the stop mark. this is only useful if you do some work, then finish, then do some work that
           shouldn't be timed and finally report. Something like:

             $p->restart;
             # do some work here...
             $p->stop;
             # do some post-work here
             print $p->report;
             # `post-work' will not be timed

           Stop is useless if you want to report time as soon as work is finished like:

             $p->restart;
             # do some work here...
             print $p->report;

       continue
           Clears the stop mark. (mostly useless, perhaps you need to restart?)

       attr
           Sets and returns internal values for attributes. Available attributes are:

           min This is the min value of the items that will follow (used to calculate estimated finish time)

           max This is the max value of all items in the even (also used to calculate estimated finish time)

           format
               This is the default report format. It is used if report is called without parameters.

           attr returns array of the set attributes:

             my ( $new_min, $new_max ) = $p->attr( min => 1, max => 5 );

           If you want just to get values use undef:

             my $old_format = $p->attr( format => undef );

           This way of handling attributes is a bit heavy but saves a lot of attribute handling functions.
           attr will complain if you pass odd number of parameters.

       report
           report is the most complex method in this package. :)

           expected arguments are:

             $p->report( format, [current_item] );

           format is string that will be used for the result string. Recognized special sequences are:

           %l  elapsed seconds

           %L  elapsed time in minutes in format MM:SS

           %e  remaining seconds

           %E  remaining time in minutes in format MM:SS

           %p  percentage done in format PPP.P%

           %f  estimated finish time in format returned by localtime()

           %b
           %B  progress bar which looks like:

                 ##############......................

               %b takes optional width:

                 %40b -- 40-chars wide bar
                 %9b  --  9-chars wide bar
                 %b   -- 79-chars wide bar (default)

           Parameters can be ommited and then default format set with attr will be used.

           Sequences 'L', 'l', 'E' and 'e' can have width also:

             %10e
             %5l
             ...

           Estimate time calculations can be used only if min and max values are set (see attr method) and
           current item is passed to report! if you want to use the default format but still have estimates
           use it like this:

             $p->format( undef, 45 );

           If you don't give current item (step) or didn't set proper min/max value then all estimate
           sequences will have value `n/a'.

           You can freely mix reports during the same event.

       elapsed
       estimate
           helpers -- return elapsed/estimate seconds.

       elapsed_str
       estimate_str
           helpers -- return elapsed/estimated string in format:

             "elapsed time is MM:SS min.\n"
             "remaining time is MM:SS min.\n"

           all helpers need one argument--current item.

FORMAT EXAMPLES
         # $c is current element (step) reached
         # for the examples: min = 0, max = 100, $c = 33.3

         print $p->report( "done %p elapsed: %L (%l sec), ETA %E (%e sec)\n", $c );
         # prints:
         # done  33.3% elapsed time   0:05 (5 sec), ETA   0:07 (7 sec)

         print $p->report( "%45b %p\r", $c );
         # prints:
         # ###############..............................  33.3%

         print $p->report( "done %p ETA %f\n", $c );
         # prints:
         # done  33.3% ETA Sun Oct 21 16:50:57 2001

AUTHOR
         Vladi Belperchinov-Shabanski "Cade"

         <cade@biscom.net> <cade@datamax.bg> <cade@cpan.org>

         http://cade.datamax.bg



perl v5.16.2                                     2010-09-10                                      Progress(3)