NAME

       Games::Go::Sgf2Dg::Dg2Tk - convert Games::Go::Sgf2Dg::Diagrams to perl/Tk windows

SYNOPSIS

       use Games::Go::Sgf2Dg::Dg2Tk

        my $dg2tk = B<Games::Go::Sgf2Dg::Dg2Tk-E<gt>new> (options);
        my $canvas = $dg2tk->convertDiagram($diagram);

DESCRIPTION

       A Games::Go::Sgf2Dg::Dg2Tk object converts a Games::Go::Sgf2Dg::Diagram object into
       Tk::Canvas item.  The close method calls Tk::MainLoop to dispays the collection of
       Canvases.

       Bindings for the normal editing keys: Up, Down, Next (PageDown) and Prior (PageUp)
       traverse the NoteBook tabs.  Tab and Shift-tab also work as expected.

       Left and Right keys select the previous or next NoteBook tab, but don't display it.  Space
       and Enter (carriage return) display the selected tab.

NEW

       my $dg2tk = Games::Go::Sgf2Dg::Dg2Tk->new (?options?)
           Any options passed to Dg2Tk that are not recognized are passed in turn to the
           Tk::Canvas widgets as they are created (which may cause errors if Tk::Canvas also does
           not recognize them).

       A new Games::Go::Sgf2Dg::Dg2Tk takes the following options:

       boardSizeX => number
       boardSizeY => number
               Sets the size of the board.

               Default: 19

       doubleDigits => true | false
               Numbers on stones are wrapped back to 1 after they reach 100.  Numbers associated
               with comments and diagram titles are not affected.

               Default: false

       coords => true | false
               Generates a coordinate grid.

               Default: false

       topLine     => number (Default: 1)
       bottomLine  => number (Default: 19)
       leftLine    => number (Default: 1)
       rightLine   => number (Default: 19)
               The edges of the board that should be displayed.  Any portion of the board that
               extends beyond these numbers is not included in the output.

       diaCoords => sub { # convert $x, $y to Games::Go::Sgf2Dg::Diagram coordinates }
               This callback defines a subroutine to convert coordinates from $x, $y to whatever
               coordinates are used in the Games::Go::Sgf2Dg::Diagram object.  The default
               diaCoords converts 1-based $x, $y to the same coordinates used in SGF format
               files.  You only need to define this if you're using a different coordinate system
               in the Diagram.

               Default:
                   sub { my ($x, $y) = @_;
                         $x = chr($x - 1 + ord('a')); # convert 1 to 'a', etc
                         $y = chr($y - 1 + ord('a'));
                         return("$x$y"); },           # concatenate two letters

               See also the diaCoords method below.

METHODS

       $dg2tk->configure (option => value, ?...?)
           Change Dg2Tk options from values passed at new time.

       my $coord = $dg2mp->diaCoords ($x, $y)
           Provides access to the diaCoords option (see above).  Returns coordinates in the
           converter's coordinate system for board coordinates ($x, $y).  For example, to get a
           specific intersection structure:

               my $int = $diagram->get($dg2mp->diaCoords(3, 4));

       $dg2tk->print ($text ? , ... ?)
           For most Dg2 converters, print inserts diagram source code (TeX, ASCII, whatever)
           directly into the diagram source stream.  Since Tk displays the diagrams immediately,
           there is no concept of a source stream, so print just generates a warning.

       $dg2tk->printComment ($text ? , ... ?)
           Adds $text to the diagram comments.

       $dg2tk->comment ($comment ? , ... ?)
           For most Dg2 converters, comment inserts comments into the diagram source code (TeX,
           ASCII, whatever).  Since Tk displays the diagrams immediately, there is no concept of
           a source stream, so comment does nothing.

       my $canvas = $dg2tk->convertDiagram ($diagram)
           Converts a Games::Go::Sgf2Dg::Diagram into a Tk::Canvas widget.  Returns a reference
           to the Canvas.  The Canvas is also added to the Tk::NoteBook collection of diagrams
           that are displayed (at close time).

       my $converted_text = $dg2tk->convertText ($text)
           Converts $text into text for display - gee, that's not very hard.  In fact, this
           method simply returns whatever is passed to it.  This is really just a place-holder
           for more complicated converters.

           Returns the converted text.

       $dg2tk->close
           prints any final text to the diagram (currently none) and closes the dg2tk object.
           Also closes file if appropriate.

       $dg2tk->notebook
           Returns a reference to the notebook of Tk::Canvas objects.

       $dg2tk->diagrams
           Returns a reference to the list of Tk::Canvas objects that make up the Tk::NoteBook of
           diagrams.  Note that each item in the list is actually a Tk::Scrolled object, the
           actual Tk::Canvas object is:

               my $canvas = $dg2tk->diagrams->[$idx]->Subwidget('scrolled');

SEE ALSO

       sgf2dg(1)
           Script to convert SGF format files to Go diagrams

BUGS

       We ain't got to show you no stinkin' bugs!