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package Term::MultiSpinner; |
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use strict; |
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use warnings; |
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use 5.006_000; |
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our $VERSION = '0.01'; |
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=head1 NAME |
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Term::MultiSpinner - Term::Spinner with multiple spinners |
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=head1 SYNOPSIS |
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use Term::MultiSpinner; |
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my $spinner = Term::MultiSpinner->new(); |
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while(... a complicated async loop ...) { |
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if(... can read some data ...) { |
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$spinner->advance(0); |
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# read stuff |
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$spinner->finish(0) if $done_reading; |
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} |
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if(... can write some data ...) { |
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$spinner->advance(1); |
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# write stuff |
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$spinner->finish(1) if $done_writing; |
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} |
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} |
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undef $spinner; # clears final spinner output by default. |
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=head1 DESCRIPTION |
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This is a subclass of L<Term::Spinner>, see those docs first. |
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This class provides multiple spinners on the same line, to |
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represent the state of several asynchronous long-running |
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tasks. Ideal for a complex C<select>-based loop, a L<POE> |
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process, etc. |
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Another good place to use it is if you have a long queue of |
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short tasks to complete and can only do a small number in |
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parallel at a time. Use the first spinner to indicate when |
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a task is taken from the queue and started, and the second |
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spinner to indicate task completion. |
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The docs below only indicate deviations from the interface |
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of L<Term::Spinner>, see those docs for the basic information. |
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=cut |
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use Carp qw/croak/; |
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use IO::Handle; |
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use Moose; |
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extends 'Term::Spinner'; |
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has '_spinners' => ( |
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is => 'rw', |
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isa => 'ArrayRef', |
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default => sub { [] }, |
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); |
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has '_suppress_draw' => ( |
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is => 'rw', |
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isa => 'Bool', |
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default => 0, |
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); |
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=head1 METHODS |
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=head2 clear |
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=cut |
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sub clear { |
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my ($self) = @_; |
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my $drawn = $self->_drawn; |
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return if !$drawn; |
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$self->output_handle->print( |
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"\010" x $drawn, |
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q{ } x $drawn, |
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"\010" x $drawn, |
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); |
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$self->_drawn(0); |
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} |
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=head2 draw |
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=cut |
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sub draw { |
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my ($self) = @_; |
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return if $self->_suppress_draw; |
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$self->clear(); |
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$self->output_handle->print( |
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join(q{}, map { $self->spin_chars->[$_] } @{$self->_spinners}) |
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); |
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$self->_drawn(scalar(@{$self->_spinners})); |
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} |
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=head2 advance |
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Requires an argument, which is the integer spinner slot to advance. |
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The first spinner is C<0>. The number of spinners on the screen |
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will always automagically expand to include the entire range of |
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C<0> through the highest number you've directly accessed. |
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=cut |
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sub advance { |
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my ($self, $which) = @_; |
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croak "advance() requires a spinner number" |
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if !defined $which; |
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my $spinners = $self->_spinners; |
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if($which > $#$spinners) { |
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push(@$spinners, 0) for (1..($which-$#$spinners)); |
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} |
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$spinners->[$which] = ($spinners->[$which] + 1) % $#{$self->spin_chars}; |
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$self->draw(); |
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} |
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=head2 finish |
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Requires an argument, which is the integer spinner slot to finish. |
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The first spinner is C<0>. The number of spinners on the screen |
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will always automagically expand to include the entire range of |
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C<0> through the highest number you've directly accessed. |
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=cut |
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sub finish { |
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my ($self, $which) = @_; |
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croak "finish() requires a spinner number" |
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if !defined $which; |
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$self->_spinners->[$which] = $#{$self->spin_chars}; |
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$self->draw(); |
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} |
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=head2 advance_all |
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Calls L</advance> on all spinners. |
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=cut |
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sub advance_all { |
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my ($self) = @_; |
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$self->_suppress_draw(1); |
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$self->advance($_) for (0..$#{$self->_spinners}); |
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$self->_suppress_draw(0); |
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$self->draw(); |
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} |
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=head2 finish_all |
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Calls L</finish> on all spinners. |
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=cut |
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sub finish_all { |
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my ($self) = @_; |
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$self->_suppress_draw(1); |
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$self->finish($_) for (0..$#{$self->_spinners}); |
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$self->_suppress_draw(0); |
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$self->draw(); |
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} |
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sub _destruct_cleanup { |
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my ($self) = @_; |
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$self->finish_all if $self->finish_on_destruct; |
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$self->clear if $self->clear_on_destruct; |
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} |
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185
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no Moose; |
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187
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=head1 AUTHOR |
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189
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Brandon L. Black, E<lt>blblack@gmail.comE<gt> |
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191
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=head1 COPYRIGHT AND LICENSE |
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193
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Copyright 2007 Brandon L. Black |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself. |
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198
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=cut |
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1; |