#!/usr/bin/perl
use strict;
use warnings;
use diagnostics;

use UI::Dialog::Backend::Whiptail;


sub printerr { print STDERR 'UI::Dialog : '.join( " ", @_ ); }
sub CB_CANCEL {
    my $args = shift();
    my $func = $args->{'caller'};
    printerr("CB_CANCEL > ".$func." (This is executed when the user presses the CANCEL button.)\n");
}
sub CB_OK {
    my $args = shift();
    my $func = $args->{'caller'};
    printerr("CB_OK > ".$func." (This is executed when the user presses the OK button.)\n");
}
sub CB_ESC {
    my $args = shift();
    my $func = $args->{'caller'};
    printerr("CB_ESC > ".$func." (This is executed when the user presses the ESC button.)\n");
}
sub CB_PRE {
    my $args = shift();
    my $func = $args->{'caller'};
    sleep(1); # we wait for a second so that the user can digest STDERR before the next widget...
    printerr("CB_PRE > ".$func." (This is executed before any widget does anything.)\n");
}
sub CB_POST {
    my $args = shift();
    my $func = $args->{'caller'};
    my $state = shift()||'NULL';
    printerr("CB_POST > ".$func." > ".$state." (This is executed after any widget has completed it's run.)\n");
}

my $d = new UI::Dialog::Backend::Whiptail ( title => "UI::Dialog::Backend::Whiptail Demo",
											debug => 0, height => 20, width => 65, listheight => 10,
											callbacks => { CANCEL => \&CB_CANCEL,
														   ESC => \&CB_ESC,
														   OK => \&CB_OK,
														   PRE => \&CB_PRE,
														   POST => \&CB_POST } );

sub CALLBACK_TEST {
    $d->msgbox( title => '$d->msgbox()',
				text =>  'This is a test of the callback functionality. '.
				'On the console STDERR output you should see "CB_PRE > main::CALLBACK_TEST". '.
				'This is because this msgbox() widget has been called from a function named CALLBACK_TEST.' );
}
CALLBACK_TEST();
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$d->infobox( title => '$d->infobox', timeout => 6000,
			 text => 'This is the infobox widget. '.
			 'There should be no buttons below this text message, '.
			 'the title of this message box should be "$d->infobox()", ' .
			 'and this should disappear after 6 seconds.' );
$d->msgbox( title => '$d->msgbox()',
			text =>  'This is the msgbox widget. ' .
			'There should be a single "OK" button below this text message, ' .
			'and the title of this message box should be "$d->msgbox()".' );

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if ($d->yesno( title => '$d->yesno()',
			   text => 'This is a question widget. '.
			   'There should be "OK" and "CANCEL" buttons below this text message. '.
			   'and the title of this message box should be "$d->yesno()".' )) {
    printerr("The user has answered YES to the yesno widget.\n");
} else {
    printerr("The user has answered NO to the yesno widget.\n");
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$d->gauge_start( title => '$d->gauge_start()',
				 text => 'This is a progress indicator.' );
foreach my $i (20,40,60,80,100) {
    last unless $d->gauge_set($i);
    sleep(1);
}
$d->gauge_stop();


#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my $inputbox = $d->inputbox( title => '$d->inputbox()',
							 text => 'Please enter some text below:',
                             entry => 'preset text entry' );
if ($d->state() eq "OK") {
    print "You input: ".($inputbox||'NULL')."\n";
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my $password = $d->password( title => '$d->password()',
							 text => 'Please input text below: (text should be hidden)' );
if ($d->state() eq "OK") {
    print "You input: ".($password||'NULL')."\n";
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$d->textbox( title => '$d->textbox()', path => $0 );

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my $menuSelect = $d->menu( title => '$d->menu()', text=>'select:',
						   list => [ 'Test', 'testing',
									 'Whip', 'whiptail' ] );
if ($d->state() eq "OK") {
    print "You selected: '".($menuSelect||'NULL')."'\n";
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my @checkSelect = $d->checklist( title => '$d->checklist()',
								 text => 'select:',
								 list => [ 'Test', [ 'testing', 1 ],
										   'Whip', [ 'whiptail', '0' ] ] );
if ($d->state() eq "OK") {
    print "You selected: '".(join("' '",@checkSelect))."'\n";
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my $radioSelect = $d->radiolist( title => '$d->radiolist()',
								 text => 'select:',
								 list =>[ 'test', [ 'testing', 0 ],
										  'Whip', [ 'whiptail', 1 ] ]);
if ($d->state() eq "OK") {
    print "You selected: '".$radioSelect."'\n";
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my $dirname = $d->dselect( title => '$d->dselect()',
						   path => "/" );
if ($d->state() eq "OK") {
    print "You selected: '".$dirname."'\n";
}

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
my $filename = $d->fselect( title => '$d->fselect()',
							path => $dirname );
if ($d->state() eq "OK") {
    print "You selected: '".$filename."'\n";
}


exit();