package Cdk::Scroll;

@ISA = qw (Cdk);

#
# This creates a new Scroll object.
#
sub new {
    my $type   = shift;
    my %params = @_;
    my $self   = {};
    my $name   = "${type}::new";

    # Retain the type of the object.
    $self->{'Type'} = $type;

    # Set up the parameters passed in.
    my $list   = Cdk::checkReq( $name, "List",   $params{'List'} );
    my $height = Cdk::checkReq( $name, "Height", $params{'Height'} );
    my $width  = Cdk::checkReq( $name, "Width",  $params{'Width'} );
    my $title = Cdk::checkDef( $name, "Title", $params{'Title'}, "" );
    my $xpos  = Cdk::checkDef( $name, "Xpos",  $params{'Xpos'},  "CENTER" );
    my $ypos  = Cdk::checkDef( $name, "Ypos",  $params{'Ypos'},  "CENTER" );
    my $spos  = Cdk::checkDef( $name, "Spos",  $params{'Spos'},  "NONE" );
    my $numbers =
      Cdk::checkDef( $name, "Numbers", $params{'Numbers'}, "FALSE" );
    my $hlight =
      Cdk::checkDef( $name, "Highlight", $params{'Highlight'}, "A_REVERSE" );
    my $box    = Cdk::checkDef( $name, "Box",    $params{'Box'},    "TRUE" );
    my $shadow = Cdk::checkDef( $name, "Shadow", $params{'Shadow'}, "FALSE" );

    # Create the thing.
    $self->{'Me'} = Cdk::Scroll::New(
        $title,  $params{'List'}, $height, $width,
        $xpos,   $ypos,           $spos,   $numbers,
        $hlight, $box,            $shadow
    );
    bless $self;
}

#
# This activates the object
#
sub activate {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::activate";

    # Activate the object...
    if ( defined $params{'Input'} ) {
        $self->{'Info'} =
          Cdk::Scroll::Activate( $self->{'Me'}, $params{'Input'} );
    }
    else {
        $self->{'Info'} = Cdk::Scroll::Activate( $self->{'Me'} );
    }
    return ( $self->{'Info'} );
}

#
# This injects a character into the widget.
#
sub inject {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::inject";

    # Set the values.
    my $character = Cdk::checkReq( $name, "Input", $params{'Input'} );

    return ( Cdk::Scroll::Inject( $self->{'Me'}, $character ) );
}

#
# This adds a line to the scrolling list.
#
sub add {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::add";

    # Set the values.
    my $item = Cdk::checkReq( $name, "Item", $params{'Item'} );
    Cdk::Scroll::Add( $self->{'Me'}, $item );
}

#
# This deletes a line from the scrolling list.
#
sub delete {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::delete";

    # Set the values.
    my $position = Cdk::checkReq( $name, "Position", $params{'Position'} );
    Cdk::Scroll::Delete( $self->{'Me'}, $position );
}

#
# This allows us to bind a key to an action.
#
sub bind {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::bind";

    # Set the values.
    my $key      = Cdk::checkReq( $name, "Key",      $params{'Key'} );
    my $function = Cdk::checkReq( $name, "Function", $params{'Function'} );
    Cdk::Scroll::Bind( $self->{'Me'}, $key, $params{'Function'} );
}

#
# This allows us to set a pre-process function.
#
sub preProcess {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::preProcess";

    # Set the values.
    my $function = Cdk::checkReq( $name, "Function", $params{'Function'} );
    Cdk::Scroll::PreProcess( $self->{'Me'}, $params{'Function'} );
}

#
# This allows us to set a post-process function.
#
sub postProcess {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::postProcess";

    # Set the values.
    my $function = Cdk::checkReq( $name, "Function", $params{'Function'} );
    Cdk::Scroll::PostProcess( $self->{'Me'}, $params{'Function'} );
}

#
# This draws the object.
#
sub draw {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::draw";

    # Set up the parameters passed in.
    my $box = Cdk::checkDef( $name, "Box", $params{'Box'}, "TRUE" );

    # Draw the object.
    Cdk::Scroll::Draw( $self->{'Me'}, $box );
}

#
# This sets several parameters of the widget.
#
sub set {
    my $self   = shift;
    my %params = @_;
    my $name   = "$self->{'Type'}::set";

    #
    # Check the parameters sent in.
    #
    if ( defined $params{'Items'} ) {
        Cdk::Scroll::SetItems( $self->{'Me'}, $params{'Items'} );
    }
    if ( defined $params{'Highlight'} ) {
        Cdk::Scroll::SetHighlight( $self->{'Me'}, $params{'Highlight'} );
    }
    if ( defined $params{'ULChar'} ) {
        Cdk::Scroll::SetULChar( $self->{'Me'}, $params{'ULChar'} );
    }
    if ( defined $params{'URChar'} ) {
        Cdk::Scroll::SetURChar( $self->{'Me'}, $params{'URChar'} );
    }
    if ( defined $params{'LLChar'} ) {
        Cdk::Scroll::SetLLChar( $self->{'Me'}, $params{'LLChar'} );
    }
    if ( defined $params{'LRChar'} ) {
        Cdk::Scroll::SetLRChar( $self->{'Me'}, $params{'LRChar'} );
    }
    if ( defined $params{'VChar'} ) {
        Cdk::Scroll::SetVerticalChar( $self->{'Me'}, $params{'VChar'} );
    }
    if ( defined $params{'HChar'} ) {
        Cdk::Scroll::SetHorizontalChar( $self->{'Me'}, $params{'HChar'} );
    }
    if ( defined $params{'BoxAttribute'} ) {
        Cdk::Scroll::SetBoxAttribute( $self->{'Me'}, $params{'BoxAttribute'} );
    }
    if ( defined $params{'BGColor'} ) {
        Cdk::Scroll::SetBackgroundColor( $self->{'Me'}, $params{'BGColor'} );
    }
    if ( defined $params{'Box'} ) {
        Cdk::Scroll::SetBox( $self->{'Me'}, $params{'Box'} );
    }
}

#
# This erases the object.
#
sub erase {
    my $self = shift;
    Cdk::Scroll::Erase( $self->{'Me'} );
}

#
# This function raises the object.
#
sub raise {
    my $self = shift;
    Cdk::Scroll::Raise( $self->{'Me'} );
}

#
# This function lowers the object.
#
sub lower {
    my $self = shift;
    Cdk::Scroll::Lower( $self->{'Me'} );
}

#
# This function registers the object.
#
sub register {
    my $self = shift;
    Cdk::Scroll::Register( $self->{'Me'} );
}

#
# This function unregisters the object.
#
sub unregister {
    my $self = shift;
    Cdk::Scroll::Unregister( $self->{'Me'} );
}

#
# This function returns the pointer to the window.
#
sub getwin {
    my $self = shift;
    Cdk::Scroll::GetWindow( $self->{'Me'} );
}

#
# This function returns the size of the scrolling list and the
# currently highlighted item.
#
sub info {
    my $self = shift;
    return Cdk::Scroll::Info( $self->{'Me'} );
}

1;