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#!/usr/bin/perl -w
=head1 NAME
Debconf::Element::Dialog::Progress - A progress bar in a dialog box
=cut
package Debconf::Element::Dialog::Progress;
use strict;
use base qw(Debconf::Element);
=head1 DESCRIPTION
This is an element that can display a dialog box with a progress bar on it.
=cut
sub _communicate {
my $this=shift;
my $data=shift;
my $dialoginput = $this->frontend->dialog_input_wtr;
print $dialoginput $data;
}
sub _percent {
my $this=shift;
use integer;
return (($this->progress_cur() - $this->progress_min()) * 100 / ($this->progress_max() - $this->progress_min()));
}
sub start {
my $this=shift;
# Use the short description as the window title, matching cdebconf.
$this->frontend->title($this->question->description);
my ($text, $lines, $columns);
if (defined $this->_info) {
($text, $lines, $columns)=$this->frontend->sizetext($this->_info->description);
} else {
# Make sure dialog allocates a bit of extra space, to allow
# for later PROGRESS INFO commands.
($text, $lines, $columns)=$this->frontend->sizetext(' ');
}
# Force progress bar to full available width, to avoid windows
# flashing.
if ($this->frontend->screenwidth - $this->frontend->columnspacer > $columns) {
$columns = $this->frontend->screenwidth - $this->frontend->columnspacer;
}
my @params=('--gauge');
push @params, $this->frontend->dashsep if $this->frontend->dashsep;
push @params, ($text, $lines + $this->frontend->spacer, $columns, $this->_percent);
$this->frontend->startdialog($this->question, 1, @params);
$this->_lines($lines);
$this->_columns($columns);
}
sub set {
my $this=shift;
my $value=shift;
$this->progress_cur($value);
$this->_communicate($this->_percent . "\n");
}
sub info {
my $this=shift;
my $question=shift;
$this->_info($question);
my ($text, $lines, $columns)=$this->frontend->sizetext($question->description);
if ($lines > $this->_lines or $columns > $this->_columns) {
# Start a new, bigger dialog if this won't fit.
$this->stop;
$this->start;
}
# TODO: escape the "XXX" marker required by dialog somehow? */
# The line immediately following the marker should be a new
# percentage, but whiptail (as of 0.51.6-17) looks for a percentage
# in the wrong buffer and fails to refresh the display as a result.
# To work around this bug, we give it the current percentage again
# afterwards to force a refresh.
$this->_communicate(
sprintf("XXX\n%d\n%s\nXXX\n%d\n",
$this->_percent, $text, $this->_percent));
}
sub stop {
my $this=shift;
$this->frontend->waitdialog;
$this->frontend->title($this->frontend->requested_title);
}
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