#!/usr/local/bin/perl
use Tk;
use Tk::Gauge;
use Tk::Pane;
use subs qw/ fuel speedometer tachometer temperature /;
use strict;
use warnings;

my $mw = MainWindow->new;
$mw = $mw->Scrolled( qw/ Pane -width 400 -height 400 / )->pack( qw/ -fill both -expand 1 / );
$mw->configure( -background => 'black' );

my $tachf  = $mw->Frame->pack( qw/ -side left / );
my $speedf = $mw->Frame->pack( qw/ -side left / );
my $fuelf  = $mw->Frame->pack( qw/ -side left / );
my $gearf  = $mw->Frame->pack( qw/ -side left / );
my $tempf  = $mw->Frame->pack( qw/ -side left / );

my $t = $tachf->Frame->pack( qw/ -side left / );
$t->Frame( qw/ -height 30 -background black / )->pack( qw/ -fill both -expand yes / );
tachometer  ( $t )->pack( qw/ -side left / );

speedometer ( $speedf )->pack( qw/ -side left / );

my $ff = $fuelf->Frame->pack( qw/ -side left / );
$ff->Frame( qw/ -height 180 -background black / )->pack( qw/ -fill both -expand yes / );
fuel        ( $ff )->pack( qw/ -side left / );

my $gf = $gearf->Frame( qw/ -background black / )->pack( qw/ -side left / );
$gf->Button( qw/ -state disabled -text P  -foreground white -background black / )->pack( qw/ -side top -padx 10 -pady 5 / );
$gf->Button( qw/ -state disabled -text R  -foreground white -background black / )->pack( qw/ -side top -padx 10 -pady 5 / );
$gf->Button( qw/ -state disabled -text N  -foreground white -background black / )->pack( qw/ -side top -padx 10 -pady 10 / );
$gf->Button( qw/ -state disabled -text D4 -disabledforeground green -background black / )->pack( qw/ -side top -padx 10 -pady 5 / );
$gf->Button( qw/ -state disabled -text D3 -foreground white -background black / )->pack( qw/ -side top -padx 10 -pady 5 / );
$gf->Button( qw/ -state disabled -text 2  -foreground white -background black / )->pack( qw/ -side top -padx 10 -pady 5 / );
$gf->Button( qw/ -state disabled -text 1  -foreground white -background black / )->pack( qw/ -side top -padx 10 -pady 5 / );

my $tf = $tempf->Frame->pack( qw/ -side left / );
$tf->Frame( qw/ -height 180 -background black / )->pack( qw/ -fill both -expand yes / );
temperature ( $tf )->pack( qw/ -side left / );

MainLoop;

sub fuel {

    my $c = shift;

    my $font = 'Helvetica 20';
    my $fuelv;
    my $tempv;
    my $radius = 80;
    my $ticks  = 36;

    my $fuel = $c->Gauge(
        -background           => 'black',
        -extent               => 90,	      
        -fill                 => 'black',
        -from                 => 0,
        -highlightthickness   => 0,
        -hubcolor             => 'gray21',
        -huboutline           => 'gray21',
        -hubplace             => 'underneedle',
        -hubradius            => 10,
        -majortickinterval    => 18,
        -majorticklength      => 15,
        -majortickcolor       => 'white',
        -majorticklabelcolor  => 'white',
        -majorticklabelplace  => 'hide',
        -majorticklabelscale  => .5,
        -majortickthickness   => 4,
        -minortickinterval    => 1,
        -minortickcolor       => 'white',
        -minorticklength      => 10,
        -needles              => [
		              {
		                  -radius     => $radius,
		                  -color      => 'orangered2',
		                  -variable   => \$fuelv,
		                  -width      => 3,
                                  -showvalue  => 0,
                                  -titlecolor => 'white',
                                  -titleplace => 'north',
                                  -arrowshape => [ 6, 6, 0 ],
		              },
		             ] ,
        -to                   => $ticks,
        -start                => 0,
        -style                => 'pieslice',
    );

    my( $hx, $hy ) = $fuel->centerpoint;
    my $fw = $fuel->fontMeasure( $font, '0' );
    $fuel->createText( $hx - $fw , $hy - $radius, -text => 'F', -fill => 'white', -font => $font );
    $fuel->createText( $hx + $radius , $hy + $fw, -text => 'E', -fill => 'white', -font => $font );
    $mw->after(1000 => sub {$fuelv = $ticks * 0.75 } );

    return $fuel;

} # end fuel

sub temperature {

    my $c = shift;

    my $font = 'Helvetica -20';
    my $fuelv;
    my $tempv;
    my $radius = 80;
    my $ticks  = 36;

    my $temp = $c->Gauge(
        -background           => 'black',
        -bands                => [
                              {
                                  -arccolor => 'red', 
                                  -minimum  => 32,
                                  -maximum  => 36,
                                  -piecolor => 'red', 
                                  -tags     => 'redtemp',
                              },
                             ],
        -bandplace            => 'overticks',
        -bandstyle            => 'band',
        -bandwidth            => 16,
        -extent               => -90,	      
        -fill                 => 'black',
        -from                 => 0,
        -highlightthickness   => 0,
        -hubcolor             => 'gray21',
        -huboutline           => 'gray21',
        -hubplace             => 'underneedle',
        -hubradius            => 10,
        -majortickinterval    => 36,
        -majorticklength      => 15,
        -majortickcolor       => 'white',
        -majorticklabelcolor  => 'white',
        -majorticklabelplace  => 'hide',
        -majorticklabelscale  => .5,
        -majortickthickness   => 4,
        -minortickinterval    => 1,
        -minortickcolor       => 'white',
        -minorticklength      => 10,
        -needles              => [
		              {
		                  -radius     => $radius,
		                  -color      => 'orangered2',
		                  -variable   => \$tempv,
		                  -width      => 3,
                                  -showvalue  => 0,
                                  -titlecolor => 'white',
                                  -titleplace => 'north',
                                  -arrowshape => [ 6, 6, 0 ],
		              },
		             ] ,
        -to                   => $ticks,
        -start                => 180,
        -style                => 'pieslice',
    );

    my( $hx, $hy ) = $temp->centerpoint;
    my $fw = $temp->fontMeasure( $font, '0' );
    $temp->createText( $hx + $fw , $hy - $radius, -text => 'H', -fill => 'white', -font => $font );
    $temp->createText( $hx - $radius , $hy + $fw, -text => 'C', -fill => 'white', -font => $font );

    $mw->after(1000 => sub {$tempv = $ticks * 0.25 } );

    return $temp;

} # end temperature

sub speedometer {
    
    my $c = shift;

    my $speedv;
    my $speed = $c->Gauge(
        -background           => 'black',
        -fill                 => 'black',
        -finetickinterval     => 5,
        -fineticklength       => 5,
        -finetickcolor        => 'white',
        -from                 => 0,
        -highlightthickness   => 0,
        -hubcolor             => 'gray21',
        -huboutline           => 'gray21',
        -hubplace             => 'underneedle',
        -hubradius            => 20,
        -majortickinterval    => 20,
        -majorticklength      => 15,
        -majortickcolor       => 'white',
        -majorticklabelcolor  => 'white',
        -minortickinterval    => 10,
        -minorticklength      => 15,
        -minortickcolor       => 'white',
        -needles              => [
		              {
		                  -radius     => 160,
		                  -color      => 'orangered2',
		                  -variable   => \$speedv,
		                  -width      => 3,
                                  -showvalue  => 0,
                                  -title      => 'mph',
                                  -titlecolor => 'white',
                                  -titleplace => 'north',
                                  -arrowshape => [ 6, 6, 0 ],
		              },
		             ] ,
        -needlepad            => 15,
        -to                   => 150,
    );

    $mw->after(1000 => sub {$speedv = 55 } );

    return $speed;

} # end speedoemter

sub tachometer {

    my $c = shift;

    my $iLCD = 50;		# integral Lowest Common Denominator
    my $tachv;
    my $tach = $c->Gauge(
    -start => 225, -extent => -270,
        -background           => 'black',
        -bands                => [
		              {
		                  -arccolor => 'red', 
		                  -minimum  => 6250 / $iLCD,
		                  -maximum  => 8000 / $iLCD,
		                  -tags     => 'redtach',
		              },
		             ],
        -bandplace            => 'overticks',
        -bandwidth            => 12,
        -fill                 => 'black',
        -finetickinterval     => 250 / $iLCD,
        -fineticklength       => 5,
        -finetickcolor        => 'white',
        -from                 => 0,
        -highlightthickness   => 0,
        -hubcolor             => 'gray21',
        -huboutline           => 'gray21',
        -hubplace             => 'underneedle',
        -hubradius            => 20,
        -majortickinterval    => 1000 / $iLCD,
        -majorticklength      => 15,
        -majortickcolor       => 'white',
        -majorticklabelcolor  => 'white',
        -majorticklabelscale  => $iLCD / 1000,
        -margin               => 50,
        -minortickinterval    => 500 / $iLCD,
        -minorticklength      => 10,
        -minortickcolor       => 'white',
        -needles              => [
		              {
		                  -radius     => 120,
		                  -color      => 'orangered2',
                                  -command    => [ sub {
				      print "tach args=@_!\n";
				      1;
                                  }, 1, 2 ],
		                  -variable   => \$tachv,
		                  -width      => 3,
                                  -showvalue  => 0,
                                  -title      => 'x 1000 r / min',
                                  -titlecolor => 'white',
                                  -titleplace => 'north',
                                  -arrowshape => [ 6, 6, 0 ],
		              },
		             ] ,
        -needlepad            => 15,
        -to                   => 8000 / $iLCD,
    );

    $mw->after(1000 => sub { $tachv = 1800 / $iLCD } );

    return $tach;

} # end tachometer