#!/usr/bin/perl
# 
# This short script tries to demonstrate with a simple example what yo
+u can  
# do with Tk Zinc widget, in particular how to use group item, clippin
+g, and 
# transformations.  
# adapted from  $Id: wheelOfFortune.pl,v 1.4 2003/09/15 12:25:05 mertz
+ Exp $ 
# by D. Etienne etienne@cena.fr 
# 
# this triple wheel demo by zentara 

use Tk;
use Tk::Zinc;

my @win =(); # an array to store winning wheel values, can range from 
             # () to (1,1,1)  

# We create a classical root widget called MainWindow; then we create 
+Zinc  
# widget child with size, color and relief attributes, and we display 
+it using 
# the geometry manager called 'pack'. 
my $mw = MainWindow->new;
$mw->geometry("700x600");

$mw->resizable(0,0);

my $zinc = $mw->Zinc(-width => 700, -height => 565,
                    -backcolor => 'black',
                     -borderwidth => 3, -relief => 'sunken');
$zinc->pack;

# Then we create a gray filled rectangle, in which we will display exp
+lain text. 
$zinc->add('rectangle', 1 , [200, 400, 490, 490],
           -linewidth => 2,
           -filled => 1,
           -fillcolor => 'SkyBlue',
           );
my $text = $zinc->add('text', 1,
                      -position => [350, 445],
                      -anchor => 'center',
                      );

$zinc->add('rectangle', 1 , [250,275,450,325], #(xpos1,ypos1,xpos2,ypo
+s2) 
           -linewidth => 2,
           -filled => 1,
           -fillcolor => 'Orange',
           );

my $wintext = $zinc->add('text', 1,
                      -position => [350, 300],
                      -anchor => 'center',
                      );

# Create the Wheel object (see Wheel.pm) 
my $wheel1 = Wheel->new($zinc, 350, 500,  100); #start xpos,ypos,mag 
my $wheel2 = Wheel->new($zinc, 350, 500, 100);
my $wheel3 = Wheel->new($zinc, 350, 500, 100);

# Display comment 
&comment("Strike any key to begin");
&wincomment("READY");

# Create Tk binding 
$mw->Tk::bind('<Key>', \&openmode);

my $closebutton = $mw->Button(text => 'Exit', -command => sub{Tk::exit
+(0)})
               ->pack;

MainLoop;

# Callback bound to '<Key>' event when wheel is unmapped 
sub openmode {
    # set binding to unmap the wheel 
    $mw->Tk::bind('<Key>', \&closemode);
    # set binding to rotate the hand 
    $zinc->bind($wheel1, '<1>', sub {spin()});
    $zinc->bind($wheel2, '<1>', sub {spin()});
    $zinc->bind($wheel3, '<1>', sub {spin()});
    # map the wheel 
    $wheel1->show(140, 150);
    $wheel2->show(350, 150);
    $wheel3->show(560, 150);

    # and then inform user 
    &comment("Click on any wheel to play.\n".
             "Strike any key to hide the wheels.");
}

sub spin {
    return if $wheel1->ismoving;
    return if $wheel2->ismoving;
    return if $wheel3->ismoving;

  @win=();
  &wincomment("PLAYING");
          $wheel1->rotatehand(int rand(360));
          $wheel2->rotatehand(int rand(360));
          $wheel3->rotatehand(int rand(360));
#  print "\@win->@win\n"; 
 }


# Callback bound to '<Key>' event when wheel is already mapped  
sub closemode {
    return if $wheel1->ismoving;
    return if $wheel2->ismoving;
    return if $wheel3->ismoving;

    # set binding to map the wheel 
    $mw->Tk::bind('<Key>', \&openmode);
    # unmap the wheel 
    $wheel1->hide(350, 400);
    $wheel2->hide(350, 400);
    $wheel3->hide(350, 400);
    # and then inform user 
    &comment("Strike any key to show the wheel");
}

# Just display comment  
sub comment {
    my $string = shift;
    $zinc->itemconfigure($text, -text => $string);
}

# display winning comment  
sub wincomment {
    my $string = shift;
    $zinc->itemconfigure($wintext, -text => $string);
}

sub displaywin {
  if($#win == -1){&wincomment("NO WIN")}
  if($#win == 0){&wincomment("SINGLE")}
  if($#win == 1){&wincomment("DOUBLE")}
  if($#win == 2){&wincomment("TRIPLE")}

 #restore disabled mouse click for next spin 
  $zinc->bind($wheel1, '<1>',  sub {spin()});
  $zinc->bind($wheel2, '<1>', sub {spin()});
  $zinc->bind($wheel3, '<1>', sub {spin()});
}

#=====================================================================
+======== 
#                 Wheel  Class 
#=====================================================================
+======== 
package Wheel;

use strict 'vars';
use Carp;
#==================== 
# Object constructor 
#==================== 
sub new {
    my ($proto, $widget, $x, $y, $radius) = @_;

    # object attributes 
    my $self = {
        'widget' => $widget,   # widget reference 
        'origin' => [$x, $y],  # origin coordinates 
        'radius' => $radius,   # wheel radius 
        'topgroup' => undef,   # top Group item 
        'itemclip' => undef,   # id of item which clips the wheel 
        'hand' => undef,       # id of item wich represents the hand 
        #'angle' => 60,         # the angle between hand and jackpot 
        'angle' => 0,         # the angle between hand and jackpot 
        'stepsnumber' => 10,   # animations parameters 
        'afterdelay' => 60,
        'shrinkrate' => 0.8,   # zoom parameters 
        'zoomrate' => 1.1
        };
    bless $self;

    # First, we create a new Group item for the wheel. Why a Group ite
+m ? 
    # At least two reasons. Wheel object consists of several Zinc item
+s,   
    # we'll see below; it moves when it is mapped or unmapped, grows w
+hen   
    # you hit the jackpot. So, it's more easy to apply such transforma
+tions  
    # to a structured items set, using Group capability, rather than a
+pply  
    # to each item separately or using canvas-like Tags mechanism. 
    # Second reason refers to clipping. When it is mapped or unmapped,
+ wheel  
    # object is drawn inside a circle with variant radius; clipping is
+ a  
    # specific property of Group item 

    # That's why we create a Group item in the top group, and set its 
    # coordinates. 
    $self->{topgroup} = $widget->add('group', 1, -visible => 0);
    $widget->coords($self->{topgroup}, [$x, $y]);
    # All the following items will be created in this group... 

    # Create the invisible Arc item used to clip the wheel, centered o
+n the 
    # group origin. 
    $self->{itemclip} = $widget->add('arc',  $self->{topgroup},
                                     [-$radius, -$radius, $radius, $ra
+dius],
                                     -visible => 0,
                                     );
    $widget->itemconfigure($self->{topgroup}, -clip => $self->{itemcli
+p});

    # Create the wheel with 6 filled Arc items centered on the group o
+rigin 
    my $i = 0;
    for my $color (qw(magenta blue cyan green yellow red)) {
        $widget->add('arc',  $self->{topgroup},
                     [-$radius, -$radius, $radius, $radius],
                     -visible => 1,
                     -filled => 1,
                     -closed => 1,
                     -extent => 60,
                     -pieslice => 1,
                     -fillcolor => $color,
                     -linewidth => 0,
                     -startangle => 60*$i ,
                     -tags => [$self],
                     );
        $i++;
    }

    # Create the Text item representing the jackpot. 
    $widget->add('text', $self->{topgroup},
                 -position => [0, -$radius+20],
                 -font =>
                 '-adobe-helvetica-bold-o-normal--34-240-100-100-p-182
+-iso8859-1',
                 -anchor => 'center',
                 -text => "\$",
                 );

    # Create the closed Curve item representing the hand. 
    # In order to make processing easier, its rotation axis will be pl
+aced 
    # on the group origin. 
    $self->{hand} = $widget->add('curve', $self->{topgroup},
                                 [0, -$radius + 10, 20, -$radius + 40,
                                  6, -$radius + 40, 20, 10,
                                  -20, 10, -6, -$radius + 40,
                                  -20, -$radius + 40],
                                 -linewidth => 3,
                                 -linecolor => 'gray40',
                                 -filled => 1,
                                 -fillcolor => 'gray80',
                                 -closed => 1,
                                 -tags => [$self]);
    # Then, we apply rotation to the hand using the Zinc 'rotation' me
+thod. 
    #set initial pointer 
    #$widget->rotate($self->{hand}, 3.1416/3); 

    # Then we unmap the wheel; in fact, Group item is translated and i
+ts 
    # clipping circle is shrunk to a point. 
    $self->_clipAndTranslate($self->{shrinkrate}**$self->{stepsnumber}
+);

    return $self;

}

#================ 
# Public methods 
#================ 
 
# Return 1 if wheel is moving (opening or closing animation) 
sub ismoving {
    my $self = shift;
    return 1 if $self->{opening} or $self->{closing} or $self->{turnin
+g};
}

# Display wheel with animation effect 
sub show {
    my ($self, $x, $y) = @_;
    # simple lock management 
    return if $self->{opening} or $self->{closing};
    $self->{opening} = 1;
    # start animation  
    $self->_open($x, $y, 0);
}


# Unmap wheel with animation effect 
sub hide {
    my ($self, $x, $y) = @_;
    # simple lock management 
    return if $self->{opening} or $self->{closing};
    $self->{closing} = 1;
    # start animation 
    $self->_close($x, $y, 0);
}


# Just rotate the hand with animation effect. 
sub rotatehand {

    my $self = shift;
#    print "wheel-> $self->{topgroup}"; 
    my $angle = shift;
    return if $self->{turning};

#prevent "double-clicking", so mouse is disabled 
#until current play is over 
$zinc->bind($wheel1, '<1>', sub {});
$zinc->bind($wheel2, '<1>', sub {});
$zinc->bind($wheel3, '<1>', sub {});

    $angle = 0  unless $angle;
    my $oldangle = $self->{angle};
    $self->{angle} = $angle;

    if ((330 < $angle)||($angle < 30)) {
        $self->{fortune} = 1;
        push (@win, $self->{fortune});
    }
    $self->_rotatehand(2*3.1416*($angle + 720 - $oldangle)/360);
    #the 720 above gives at least one full spin each play   
}

#================= 
# Private methods 
#================= 

# Generate opening animation; see below _clipAndTranslate method for 
# Zinc specific use. 
sub _open {
    my ($self, $x, $y, $cnt) = @_;
    my $widget = $self->{widget};
    my $group = $self->{topgroup};
    # first step of animation 
    if ($cnt == 0) {
        $widget->itemconfigure($group, -visible => 1);
        my @pos = $widget->coords($group);
        $x = ($x - $pos[0])/$self->{stepsnumber};
        $y = ($y - $pos[1])/$self->{stepsnumber};
    # last step 
    } elsif ($cnt == $self->{stepsnumber}) {
        $self->{opening} = undef;
        return;
    }
    $cnt++;
    # move and grow the wheel 
    $self->_clipAndTranslate(1/$self->{shrinkrate}, $x, $y);
    # process the animation using the 'after' Tk defering method 
    $widget->after($self->{afterdelay}, sub {$self->_open($x, $y, $cnt
+)});
}


# Generate closing animation; see below _clipAndTranslate method for 
# Zinc specific use. 
sub _close {
    my ($self, $x, $y, $cnt) = @_;
    my $widget = $self->{widget};
    my $group = $self->{topgroup};
    # first step of animation 
    if ($cnt == 0) {
        my @pos = $widget->coords($group);
        $x = ($x - $pos[0])/$self->{stepsnumber};
        $y = ($y - $pos[1])/$self->{stepsnumber};
    # last step 
    } elsif ($cnt == $self->{stepsnumber}) {
        $widget->itemconfigure($group, -visible => 0);
        $self->{closing} = undef;
        return;
    }
    $cnt++;
    # move and shrink the wheel 
    $self->_clipAndTranslate($self->{shrinkrate}, $x, $y);
    # process the animation using the 'after' Tk defering method 
    $widget->after($self->{afterdelay}, sub {$self->_close($x, $y, $cn
+t)});

&main::wincomment("READY");

}


# Generate hand rotation animation. 
sub _rotatehand {
    my ($self, $angle, $cnt) = @_;
    my $widget = $self->{widget};
    my $group = $self->{topgroup};
    $self->{turning} = 1;
    # first step of animation 
    if (not $cnt) {
        $angle /= $self->{stepsnumber};
    # last step 
    } elsif ($cnt == $self->{stepsnumber}) {
        if ($self->{fortune}) {
            $self->_fortune;
        } else {
            $self->{turning} = undef;
        }

        &main::displaywin();
        return;
    }
    $cnt++;
    # use 'rotation' Zinc method. 
    $widget->rotate($self->{hand}, $angle);

    # process the animation using the 'after' Tk defering method 
    $widget->after($self->{afterdelay}, sub {$self->_rotatehand($angle
+, $cnt)});

}

# Generate growing animation to notify jackpot 
sub _fortune {
    my ($self, $cnt) = @_;
    $cnt = 0 unless $cnt;
    my $zf;
    my $widget = $self->{widget};
    my $group = $self->{topgroup};
    my @pos = $widget->coords($group);
    # last step of animation 
    if ($cnt == 6) {
        $self->{fortune} = undef;
        $self->{turning} = undef;
        return;
    # event steps : wheel grows 
    } elsif ($cnt == 0 or $cnt % 2 == 0) {
        $zf = $self->{zoomrate};
    # odd steps : wheel is shrunk 
    } else {
        $zf = 1/$self->{zoomrate};
    }
    $cnt++;

    # Now, we apply scale transformation to the Group item, using the 
+'scale' 
    # Zinc method. Note that we reset group coords before scaling it, 
+in order 
    # that the origin of the transformation corresponds to the center 
+of the 
    # wheel. When scale is done, we restore previous coords of group. 
    $widget->coords($group, [0, 0]);
    $widget->scale($group, $zf, $zf);
    $widget->coords($group, \@pos);

    # process the animation using the 'after' Tk defering method 
    $widget->after(100, sub {print "\007";$self->_fortune($cnt)});
    &main::displaywin();
}


# Update group clipping and translation, using 'scale' and 'translate'
+ 
# Zinc methods. 
sub _clipAndTranslate {
    my ($self, $shrinkfactor, $x, $y) = @_;
    $x = 0 unless $x;
    $y = 0 unless $y;
    $self->{widget}->scale($self->{itemclip}, $shrinkfactor, $shrinkfa
+ctor);
    $self->{widget}->translate($self->{topgroup}, $x, $y);
}
1;
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